about summary refs log tree commit diff
path: root/compiler/rustc_codegen_llvm/src
diff options
context:
space:
mode:
Diffstat (limited to 'compiler/rustc_codegen_llvm/src')
-rw-r--r--compiler/rustc_codegen_llvm/src/abi.rs48
-rw-r--r--compiler/rustc_codegen_llvm/src/allocator.rs4
-rw-r--r--compiler/rustc_codegen_llvm/src/asm.rs4
-rw-r--r--compiler/rustc_codegen_llvm/src/back/archive.rs11
-rw-r--r--compiler/rustc_codegen_llvm/src/back/lto.rs29
-rw-r--r--compiler/rustc_codegen_llvm/src/back/owned_target_machine.rs2
-rw-r--r--compiler/rustc_codegen_llvm/src/back/write.rs257
-rw-r--r--compiler/rustc_codegen_llvm/src/base.rs2
-rw-r--r--compiler/rustc_codegen_llvm/src/builder.rs51
-rw-r--r--compiler/rustc_codegen_llvm/src/builder/autodiff.rs72
-rw-r--r--compiler/rustc_codegen_llvm/src/common.rs2
-rw-r--r--compiler/rustc_codegen_llvm/src/consts.rs6
-rw-r--r--compiler/rustc_codegen_llvm/src/context.rs10
-rw-r--r--compiler/rustc_codegen_llvm/src/coverageinfo/mapgen/covfun.rs55
-rw-r--r--compiler/rustc_codegen_llvm/src/coverageinfo/mod.rs23
-rw-r--r--compiler/rustc_codegen_llvm/src/debuginfo/create_scope_map.rs2
-rw-r--r--compiler/rustc_codegen_llvm/src/debuginfo/gdb.rs2
-rw-r--r--compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs24
-rw-r--r--compiler/rustc_codegen_llvm/src/debuginfo/metadata/enums/native.rs8
-rw-r--r--compiler/rustc_codegen_llvm/src/debuginfo/mod.rs49
-rw-r--r--compiler/rustc_codegen_llvm/src/debuginfo/namespace.rs8
-rw-r--r--compiler/rustc_codegen_llvm/src/debuginfo/utils.rs2
-rw-r--r--compiler/rustc_codegen_llvm/src/declare.rs2
-rw-r--r--compiler/rustc_codegen_llvm/src/errors.rs5
-rw-r--r--compiler/rustc_codegen_llvm/src/intrinsic.rs473
-rw-r--r--compiler/rustc_codegen_llvm/src/lib.rs17
-rw-r--r--compiler/rustc_codegen_llvm/src/llvm/archive_ro.rs6
-rw-r--r--compiler/rustc_codegen_llvm/src/llvm/enzyme_ffi.rs27
-rw-r--r--compiler/rustc_codegen_llvm/src/llvm/ffi.rs954
-rw-r--r--compiler/rustc_codegen_llvm/src/llvm/mod.rs94
-rw-r--r--compiler/rustc_codegen_llvm/src/llvm_util.rs3
-rw-r--r--compiler/rustc_codegen_llvm/src/mono_item.rs5
-rw-r--r--compiler/rustc_codegen_llvm/src/type_.rs8
33 files changed, 1189 insertions, 1076 deletions
diff --git a/compiler/rustc_codegen_llvm/src/abi.rs b/compiler/rustc_codegen_llvm/src/abi.rs
index 31ee0eeca11..28f423efc21 100644
--- a/compiler/rustc_codegen_llvm/src/abi.rs
+++ b/compiler/rustc_codegen_llvm/src/abi.rs
@@ -4,8 +4,7 @@ use std::cmp;
 use libc::c_uint;
 use rustc_abi as abi;
 pub(crate) use rustc_abi::ExternAbi;
-use rustc_abi::Primitive::Int;
-use rustc_abi::{HasDataLayout, Size};
+use rustc_abi::{HasDataLayout, Primitive, Reg, RegKind, Size};
 use rustc_codegen_ssa::MemFlags;
 use rustc_codegen_ssa::mir::operand::{OperandRef, OperandValue};
 use rustc_codegen_ssa::mir::place::{PlaceRef, PlaceValue};
@@ -440,7 +439,7 @@ impl<'ll, 'tcx> FnAbiLlvmExt<'ll, 'tcx> for FnAbi<'tcx, Ty<'tcx>> {
         let apply_range_attr = |idx: AttributePlace, scalar: rustc_abi::Scalar| {
             if cx.sess().opts.optimize != config::OptLevel::No
                 && llvm_util::get_version() >= (19, 0, 0)
-                && matches!(scalar.primitive(), Int(..))
+                && matches!(scalar.primitive(), Primitive::Int(..))
                 // If the value is a boolean, the range is 0..2 and that ultimately
                 // become 0..0 when the type becomes i1, which would be rejected
                 // by the LLVM verifier.
@@ -448,11 +447,11 @@ impl<'ll, 'tcx> FnAbiLlvmExt<'ll, 'tcx> for FnAbi<'tcx, Ty<'tcx>> {
                 // LLVM also rejects full range.
                 && !scalar.is_always_valid(cx)
             {
-                attributes::apply_to_llfn(llfn, idx, &[llvm::CreateRangeAttr(
-                    cx.llcx,
-                    scalar.size(cx),
-                    scalar.valid_range(cx),
-                )]);
+                attributes::apply_to_llfn(
+                    llfn,
+                    idx,
+                    &[llvm::CreateRangeAttr(cx.llcx, scalar.size(cx), scalar.valid_range(cx))],
+                );
             }
         };
 
@@ -472,10 +471,14 @@ impl<'ll, 'tcx> FnAbiLlvmExt<'ll, 'tcx> for FnAbi<'tcx, Ty<'tcx>> {
                 );
                 attributes::apply_to_llfn(llfn, llvm::AttributePlace::Argument(i), &[sret]);
                 if cx.sess().opts.optimize != config::OptLevel::No {
-                    attributes::apply_to_llfn(llfn, llvm::AttributePlace::Argument(i), &[
-                        llvm::AttributeKind::Writable.create_attr(cx.llcx),
-                        llvm::AttributeKind::DeadOnUnwind.create_attr(cx.llcx),
-                    ]);
+                    attributes::apply_to_llfn(
+                        llfn,
+                        llvm::AttributePlace::Argument(i),
+                        &[
+                            llvm::AttributeKind::Writable.create_attr(cx.llcx),
+                            llvm::AttributeKind::DeadOnUnwind.create_attr(cx.llcx),
+                        ],
+                    );
                 }
             }
             PassMode::Cast { cast, pad_i32: _ } => {
@@ -574,7 +577,7 @@ impl<'ll, 'tcx> FnAbiLlvmExt<'ll, 'tcx> for FnAbi<'tcx, Ty<'tcx>> {
         if bx.cx.sess().opts.optimize != config::OptLevel::No
                 && llvm_util::get_version() < (19, 0, 0)
                 && let abi::BackendRepr::Scalar(scalar) = self.ret.layout.backend_repr
-                && matches!(scalar.primitive(), Int(..))
+                && matches!(scalar.primitive(), Primitive::Int(..))
                 // If the value is a boolean, the range is 0..2 and that ultimately
                 // become 0..0 when the type becomes i1, which would be rejected
                 // by the LLVM verifier.
@@ -593,9 +596,11 @@ impl<'ll, 'tcx> FnAbiLlvmExt<'ll, 'tcx> for FnAbi<'tcx, Ty<'tcx>> {
                         bx.cx.llcx,
                         bx.cx.type_array(bx.cx.type_i8(), arg.layout.size.bytes()),
                     );
-                    attributes::apply_to_callsite(callsite, llvm::AttributePlace::Argument(i), &[
-                        byval,
-                    ]);
+                    attributes::apply_to_callsite(
+                        callsite,
+                        llvm::AttributePlace::Argument(i),
+                        &[byval],
+                    );
                 }
                 PassMode::Direct(attrs)
                 | PassMode::Indirect { attrs, meta_attrs: None, on_stack: false } => {
@@ -627,9 +632,11 @@ impl<'ll, 'tcx> FnAbiLlvmExt<'ll, 'tcx> for FnAbi<'tcx, Ty<'tcx>> {
             // This will probably get ignored on all targets but those supporting the TrustZone-M
             // extension (thumbv8m targets).
             let cmse_nonsecure_call = llvm::CreateAttrString(bx.cx.llcx, "cmse_nonsecure_call");
-            attributes::apply_to_callsite(callsite, llvm::AttributePlace::Function, &[
-                cmse_nonsecure_call,
-            ]);
+            attributes::apply_to_callsite(
+                callsite,
+                llvm::AttributePlace::Function,
+                &[cmse_nonsecure_call],
+            );
         }
 
         // Some intrinsics require that an elementtype attribute (with the pointee type of a
@@ -657,7 +664,7 @@ impl<'tcx> AbiBuilderMethods<'tcx> for Builder<'_, '_, 'tcx> {
 }
 
 impl llvm::CallConv {
-    pub fn from_conv(conv: Conv, arch: &str) -> Self {
+    pub(crate) fn from_conv(conv: Conv, arch: &str) -> Self {
         match conv {
             Conv::C
             | Conv::Rust
@@ -680,7 +687,6 @@ impl llvm::CallConv {
             Conv::AvrNonBlockingInterrupt => llvm::AvrNonBlockingInterrupt,
             Conv::ArmAapcs => llvm::ArmAapcsCallConv,
             Conv::Msp430Intr => llvm::Msp430Intr,
-            Conv::PtxKernel => llvm::PtxKernel,
             Conv::X86Fastcall => llvm::X86FastcallCallConv,
             Conv::X86Intr => llvm::X86_Intr,
             Conv::X86Stdcall => llvm::X86StdcallCallConv,
diff --git a/compiler/rustc_codegen_llvm/src/allocator.rs b/compiler/rustc_codegen_llvm/src/allocator.rs
index 149ded28356..66723cbf882 100644
--- a/compiler/rustc_codegen_llvm/src/allocator.rs
+++ b/compiler/rustc_codegen_llvm/src/allocator.rs
@@ -81,13 +81,13 @@ pub(crate) unsafe fn codegen(
         llvm::set_visibility(ll_g, llvm::Visibility::from_generic(tcx.sess.default_visibility()));
         let val = tcx.sess.opts.unstable_opts.oom.should_panic();
         let llval = llvm::LLVMConstInt(i8, val as u64, False);
-        llvm::LLVMSetInitializer(ll_g, llval);
+        llvm::set_initializer(ll_g, llval);
 
         let name = NO_ALLOC_SHIM_IS_UNSTABLE;
         let ll_g = llvm::LLVMRustGetOrInsertGlobal(llmod, name.as_c_char_ptr(), name.len(), i8);
         llvm::set_visibility(ll_g, llvm::Visibility::from_generic(tcx.sess.default_visibility()));
         let llval = llvm::LLVMConstInt(i8, 0, False);
-        llvm::LLVMSetInitializer(ll_g, llval);
+        llvm::set_initializer(ll_g, llval);
     }
 
     if tcx.sess.opts.debuginfo != DebugInfo::None {
diff --git a/compiler/rustc_codegen_llvm/src/asm.rs b/compiler/rustc_codegen_llvm/src/asm.rs
index 3722d4350a2..be5673eddf9 100644
--- a/compiler/rustc_codegen_llvm/src/asm.rs
+++ b/compiler/rustc_codegen_llvm/src/asm.rs
@@ -286,7 +286,9 @@ impl<'ll, 'tcx> AsmBuilderMethods<'tcx> for Builder<'_, 'll, 'tcx> {
                 InlineAsmArch::M68k => {
                     constraints.push("~{ccr}".to_string());
                 }
-                InlineAsmArch::CSKY => {}
+                InlineAsmArch::CSKY => {
+                    constraints.push("~{psr}".to_string());
+                }
             }
         }
         if !options.contains(InlineAsmOptions::NOMEM) {
diff --git a/compiler/rustc_codegen_llvm/src/back/archive.rs b/compiler/rustc_codegen_llvm/src/back/archive.rs
index 33a956e552f..93553f3f364 100644
--- a/compiler/rustc_codegen_llvm/src/back/archive.rs
+++ b/compiler/rustc_codegen_llvm/src/back/archive.rs
@@ -11,7 +11,7 @@ use rustc_codegen_ssa::back::archive::{
 use rustc_session::Session;
 
 use crate::llvm::archive_ro::{ArchiveRO, Child};
-use crate::llvm::{self, ArchiveKind};
+use crate::llvm::{self, ArchiveKind, last_error};
 
 /// Helper for adding many files to an archive.
 #[must_use = "must call build() to finish building the archive"]
@@ -169,6 +169,8 @@ impl<'a> LlvmArchiveBuilder<'a> {
             .unwrap_or_else(|kind| self.sess.dcx().emit_fatal(UnknownArchiveKind { kind }));
 
         let mut additions = mem::take(&mut self.additions);
+        // Values in the `members` list below will contain pointers to the strings allocated here.
+        // So they need to get dropped after all elements of `members` get freed.
         let mut strings = Vec::new();
         let mut members = Vec::new();
 
@@ -229,12 +231,7 @@ impl<'a> LlvmArchiveBuilder<'a> {
                 self.sess.target.arch == "arm64ec",
             );
             let ret = if r.into_result().is_err() {
-                let err = llvm::LLVMRustGetLastError();
-                let msg = if err.is_null() {
-                    "failed to write archive".into()
-                } else {
-                    String::from_utf8_lossy(CStr::from_ptr(err).to_bytes())
-                };
+                let msg = last_error().unwrap_or_else(|| "failed to write archive".into());
                 Err(io::Error::new(io::ErrorKind::Other, msg))
             } else {
                 Ok(!members.is_empty())
diff --git a/compiler/rustc_codegen_llvm/src/back/lto.rs b/compiler/rustc_codegen_llvm/src/back/lto.rs
index 78c759bbe8c..7262fce4911 100644
--- a/compiler/rustc_codegen_llvm/src/back/lto.rs
+++ b/compiler/rustc_codegen_llvm/src/back/lto.rs
@@ -606,10 +606,31 @@ pub(crate) fn run_pass_manager(
 
     // If this rustc version was build with enzyme/autodiff enabled, and if users applied the
     // `#[autodiff]` macro at least once, then we will later call llvm_optimize a second time.
-    let first_run = true;
     debug!("running llvm pm opt pipeline");
     unsafe {
-        write::llvm_optimize(cgcx, dcx, module, config, opt_level, opt_stage, first_run)?;
+        write::llvm_optimize(
+            cgcx,
+            dcx,
+            module,
+            config,
+            opt_level,
+            opt_stage,
+            write::AutodiffStage::DuringAD,
+        )?;
+    }
+    // FIXME(ZuseZ4): Make this more granular
+    if cfg!(llvm_enzyme) && !thin {
+        unsafe {
+            write::llvm_optimize(
+                cgcx,
+                dcx,
+                module,
+                config,
+                opt_level,
+                llvm::OptStage::FatLTO,
+                write::AutodiffStage::PostAD,
+            )?;
+        }
     }
     debug!("lto done");
     Ok(())
@@ -621,7 +642,7 @@ unsafe impl Send for ModuleBuffer {}
 unsafe impl Sync for ModuleBuffer {}
 
 impl ModuleBuffer {
-    pub fn new(m: &llvm::Module) -> ModuleBuffer {
+    pub(crate) fn new(m: &llvm::Module) -> ModuleBuffer {
         ModuleBuffer(unsafe { llvm::LLVMRustModuleBufferCreate(m) })
     }
 }
@@ -663,7 +684,7 @@ unsafe impl Send for ThinBuffer {}
 unsafe impl Sync for ThinBuffer {}
 
 impl ThinBuffer {
-    pub fn new(m: &llvm::Module, is_thin: bool, emit_summary: bool) -> ThinBuffer {
+    pub(crate) fn new(m: &llvm::Module, is_thin: bool, emit_summary: bool) -> ThinBuffer {
         unsafe {
             let buffer = llvm::LLVMRustThinLTOBufferCreate(m, is_thin, emit_summary);
             ThinBuffer(buffer)
diff --git a/compiler/rustc_codegen_llvm/src/back/owned_target_machine.rs b/compiler/rustc_codegen_llvm/src/back/owned_target_machine.rs
index 4cbd49aa44d..f075f332462 100644
--- a/compiler/rustc_codegen_llvm/src/back/owned_target_machine.rs
+++ b/compiler/rustc_codegen_llvm/src/back/owned_target_machine.rs
@@ -17,7 +17,7 @@ pub struct OwnedTargetMachine {
 }
 
 impl OwnedTargetMachine {
-    pub fn new(
+    pub(crate) fn new(
         triple: &CStr,
         cpu: &CStr,
         features: &CStr,
diff --git a/compiler/rustc_codegen_llvm/src/back/write.rs b/compiler/rustc_codegen_llvm/src/back/write.rs
index 4706744f353..9fa10e96068 100644
--- a/compiler/rustc_codegen_llvm/src/back/write.rs
+++ b/compiler/rustc_codegen_llvm/src/back/write.rs
@@ -40,7 +40,7 @@ use crate::errors::{
     WithLlvmError, WriteBytecode,
 };
 use crate::llvm::diagnostic::OptimizationDiagnosticKind::*;
-use crate::llvm::{self, DiagnosticInfo, PassManager};
+use crate::llvm::{self, DiagnosticInfo};
 use crate::type_::Type;
 use crate::{LlvmCodegenBackend, ModuleLlvm, base, common, llvm_util};
 
@@ -54,7 +54,7 @@ pub(crate) fn llvm_err<'a>(dcx: DiagCtxtHandle<'_>, err: LlvmError<'a>) -> Fatal
 fn write_output_file<'ll>(
     dcx: DiagCtxtHandle<'_>,
     target: &'ll llvm::TargetMachine,
-    pm: &llvm::PassManager<'ll>,
+    no_builtins: bool,
     m: &'ll llvm::Module,
     output: &Path,
     dwo_output: Option<&Path>,
@@ -63,16 +63,19 @@ fn write_output_file<'ll>(
     verify_llvm_ir: bool,
 ) -> Result<(), FatalError> {
     debug!("write_output_file output={:?} dwo_output={:?}", output, dwo_output);
-    unsafe {
-        let output_c = path_to_c_string(output);
-        let dwo_output_c;
-        let dwo_output_ptr = if let Some(dwo_output) = dwo_output {
-            dwo_output_c = path_to_c_string(dwo_output);
-            dwo_output_c.as_ptr()
-        } else {
-            std::ptr::null()
-        };
-        let result = llvm::LLVMRustWriteOutputFile(
+    let output_c = path_to_c_string(output);
+    let dwo_output_c;
+    let dwo_output_ptr = if let Some(dwo_output) = dwo_output {
+        dwo_output_c = path_to_c_string(dwo_output);
+        dwo_output_c.as_ptr()
+    } else {
+        std::ptr::null()
+    };
+    let result = unsafe {
+        let pm = llvm::LLVMCreatePassManager();
+        llvm::LLVMAddAnalysisPasses(target, pm);
+        llvm::LLVMRustAddLibraryInfo(pm, m, no_builtins);
+        llvm::LLVMRustWriteOutputFile(
             target,
             pm,
             m,
@@ -80,22 +83,22 @@ fn write_output_file<'ll>(
             dwo_output_ptr,
             file_type,
             verify_llvm_ir,
-        );
+        )
+    };
 
-        // Record artifact sizes for self-profiling
-        if result == llvm::LLVMRustResult::Success {
-            let artifact_kind = match file_type {
-                llvm::FileType::ObjectFile => "object_file",
-                llvm::FileType::AssemblyFile => "assembly_file",
-            };
-            record_artifact_size(self_profiler_ref, artifact_kind, output);
-            if let Some(dwo_file) = dwo_output {
-                record_artifact_size(self_profiler_ref, "dwo_file", dwo_file);
-            }
+    // Record artifact sizes for self-profiling
+    if result == llvm::LLVMRustResult::Success {
+        let artifact_kind = match file_type {
+            llvm::FileType::ObjectFile => "object_file",
+            llvm::FileType::AssemblyFile => "assembly_file",
+        };
+        record_artifact_size(self_profiler_ref, artifact_kind, output);
+        if let Some(dwo_file) = dwo_output {
+            record_artifact_size(self_profiler_ref, "dwo_file", dwo_file);
         }
-
-        result.into_result().map_err(|()| llvm_err(dcx, LlvmError::WriteOutput { path: output }))
     }
+
+    result.into_result().map_err(|()| llvm_err(dcx, LlvmError::WriteOutput { path: output }))
 }
 
 pub(crate) fn create_informational_target_machine(
@@ -138,7 +141,7 @@ fn to_llvm_opt_settings(cfg: config::OptLevel) -> (llvm::CodeGenOptLevel, llvm::
     match cfg {
         No => (llvm::CodeGenOptLevel::None, llvm::CodeGenOptSizeNone),
         Less => (llvm::CodeGenOptLevel::Less, llvm::CodeGenOptSizeNone),
-        Default => (llvm::CodeGenOptLevel::Default, llvm::CodeGenOptSizeNone),
+        More => (llvm::CodeGenOptLevel::Default, llvm::CodeGenOptSizeNone),
         Aggressive => (llvm::CodeGenOptLevel::Aggressive, llvm::CodeGenOptSizeNone),
         Size => (llvm::CodeGenOptLevel::Default, llvm::CodeGenOptSizeDefault),
         SizeMin => (llvm::CodeGenOptLevel::Default, llvm::CodeGenOptSizeAggressive),
@@ -150,7 +153,7 @@ fn to_pass_builder_opt_level(cfg: config::OptLevel) -> llvm::PassBuilderOptLevel
     match cfg {
         No => llvm::PassBuilderOptLevel::O0,
         Less => llvm::PassBuilderOptLevel::O1,
-        Default => llvm::PassBuilderOptLevel::O2,
+        More => llvm::PassBuilderOptLevel::O2,
         Aggressive => llvm::PassBuilderOptLevel::O3,
         Size => llvm::PassBuilderOptLevel::Os,
         SizeMin => llvm::PassBuilderOptLevel::Oz,
@@ -325,13 +328,17 @@ pub(crate) fn save_temp_bitcode(
     if !cgcx.save_temps {
         return;
     }
+    let ext = format!("{name}.bc");
+    let cgu = Some(&module.name[..]);
+    let path = cgcx.output_filenames.temp_path_ext(&ext, cgu);
+    write_bitcode_to_file(module, &path)
+}
+
+fn write_bitcode_to_file(module: &ModuleCodegen<ModuleLlvm>, path: &Path) {
     unsafe {
-        let ext = format!("{name}.bc");
-        let cgu = Some(&module.name[..]);
-        let path = cgcx.output_filenames.temp_path_ext(&ext, cgu);
-        let cstr = path_to_c_string(&path);
+        let path = path_to_c_string(&path);
         let llmod = module.module_llvm.llmod();
-        llvm::LLVMWriteBitcodeToFile(llmod, cstr.as_ptr());
+        llvm::LLVMWriteBitcodeToFile(llmod, path.as_ptr());
     }
 }
 
@@ -530,6 +537,16 @@ fn get_instr_profile_output_path(config: &ModuleConfig) -> Option<CString> {
     config.instrument_coverage.then(|| c"default_%m_%p.profraw".to_owned())
 }
 
+// PreAD will run llvm opts but disable size increasing opts (vectorization, loop unrolling)
+// DuringAD is the same as above, but also runs the enzyme opt and autodiff passes.
+// PostAD will run all opts, including size increasing opts.
+#[derive(Debug, Eq, PartialEq)]
+pub(crate) enum AutodiffStage {
+    PreAD,
+    DuringAD,
+    PostAD,
+}
+
 pub(crate) unsafe fn llvm_optimize(
     cgcx: &CodegenContext<LlvmCodegenBackend>,
     dcx: DiagCtxtHandle<'_>,
@@ -537,7 +554,7 @@ pub(crate) unsafe fn llvm_optimize(
     config: &ModuleConfig,
     opt_level: config::OptLevel,
     opt_stage: llvm::OptStage,
-    skip_size_increasing_opts: bool,
+    autodiff_stage: AutodiffStage,
 ) -> Result<(), FatalError> {
     // Enzyme:
     // The whole point of compiler based AD is to differentiate optimized IR instead of unoptimized
@@ -550,12 +567,16 @@ pub(crate) unsafe fn llvm_optimize(
     let unroll_loops;
     let vectorize_slp;
     let vectorize_loop;
+    let run_enzyme = cfg!(llvm_enzyme) && autodiff_stage == AutodiffStage::DuringAD;
 
     // When we build rustc with enzyme/autodiff support, we want to postpone size-increasing
-    // optimizations until after differentiation. FIXME(ZuseZ4): Before shipping on nightly,
+    // optimizations until after differentiation. Our pipeline is thus: (opt + enzyme), (full opt).
+    // We therefore have two calls to llvm_optimize, if autodiff is used.
+    //
+    // FIXME(ZuseZ4): Before shipping on nightly,
     // we should make this more granular, or at least check that the user has at least one autodiff
     // call in their code, to justify altering the compilation pipeline.
-    if skip_size_increasing_opts && cfg!(llvm_enzyme) {
+    if cfg!(llvm_enzyme) && autodiff_stage != AutodiffStage::PostAD {
         unroll_loops = false;
         vectorize_slp = false;
         vectorize_loop = false;
@@ -565,7 +586,7 @@ pub(crate) unsafe fn llvm_optimize(
         vectorize_slp = config.vectorize_slp;
         vectorize_loop = config.vectorize_loop;
     }
-    trace!(?unroll_loops, ?vectorize_slp, ?vectorize_loop);
+    trace!(?unroll_loops, ?vectorize_slp, ?vectorize_loop, ?run_enzyme);
     let using_thin_buffers = opt_stage == llvm::OptStage::PreLinkThinLTO || config.bitcode_needed();
     let pgo_gen_path = get_pgo_gen_path(config);
     let pgo_use_path = get_pgo_use_path(config);
@@ -633,6 +654,7 @@ pub(crate) unsafe fn llvm_optimize(
             vectorize_loop,
             config.no_builtins,
             config.emit_lifetime_markers,
+            run_enzyme,
             sanitizer_options.as_ref(),
             pgo_gen_path.as_ref().map_or(std::ptr::null(), |s| s.as_ptr()),
             pgo_use_path.as_ref().map_or(std::ptr::null(), |s| s.as_ptr()),
@@ -661,7 +683,6 @@ pub(crate) unsafe fn optimize(
 ) -> Result<(), FatalError> {
     let _timer = cgcx.prof.generic_activity_with_arg("LLVM_module_optimize", &*module.name);
 
-    let llmod = module.module_llvm.llmod();
     let llcx = &*module.module_llvm.llcx;
     let _handlers = DiagnosticHandlers::new(cgcx, dcx, llcx, module, CodegenDiagnosticsStage::Opt);
 
@@ -670,8 +691,7 @@ pub(crate) unsafe fn optimize(
 
     if config.emit_no_opt_bc {
         let out = cgcx.output_filenames.temp_path_ext("no-opt.bc", module_name);
-        let out = path_to_c_string(&out);
-        unsafe { llvm::LLVMWriteBitcodeToFile(llmod, out.as_ptr()) };
+        write_bitcode_to_file(module, &out)
     }
 
     // FIXME(ZuseZ4): support SanitizeHWAddress and prevent illegal/unsupported opts
@@ -684,18 +704,14 @@ pub(crate) unsafe fn optimize(
             _ => llvm::OptStage::PreLinkNoLTO,
         };
 
-        // If we know that we will later run AD, then we disable vectorization and loop unrolling
-        let skip_size_increasing_opts = cfg!(llvm_enzyme);
+        // If we know that we will later run AD, then we disable vectorization and loop unrolling.
+        // Otherwise we pretend AD is already done and run the normal opt pipeline (=PostAD).
+        // FIXME(ZuseZ4): Make this more granular, only set PreAD if we actually have autodiff
+        // usages, not just if we build rustc with autodiff support.
+        let autodiff_stage =
+            if cfg!(llvm_enzyme) { AutodiffStage::PreAD } else { AutodiffStage::PostAD };
         return unsafe {
-            llvm_optimize(
-                cgcx,
-                dcx,
-                module,
-                config,
-                opt_level,
-                opt_stage,
-                skip_size_increasing_opts,
-            )
+            llvm_optimize(cgcx, dcx, module, config, opt_level, opt_stage, autodiff_stage)
         };
     }
     Ok(())
@@ -744,31 +760,6 @@ pub(crate) unsafe fn codegen(
             create_msvc_imps(cgcx, llcx, llmod);
         }
 
-        // A codegen-specific pass manager is used to generate object
-        // files for an LLVM module.
-        //
-        // Apparently each of these pass managers is a one-shot kind of
-        // thing, so we create a new one for each type of output. The
-        // pass manager passed to the closure should be ensured to not
-        // escape the closure itself, and the manager should only be
-        // used once.
-        unsafe fn with_codegen<'ll, F, R>(
-            tm: &'ll llvm::TargetMachine,
-            llmod: &'ll llvm::Module,
-            no_builtins: bool,
-            f: F,
-        ) -> R
-        where
-            F: FnOnce(&'ll mut PassManager<'ll>) -> R,
-        {
-            unsafe {
-                let cpm = llvm::LLVMCreatePassManager();
-                llvm::LLVMAddAnalysisPasses(tm, cpm);
-                llvm::LLVMRustAddLibraryInfo(cpm, llmod, no_builtins);
-                f(cpm)
-            }
-        }
-
         // Note that if object files are just LLVM bitcode we write bitcode,
         // copy it to the .o file, and delete the bitcode if it wasn't
         // otherwise requested.
@@ -887,21 +878,17 @@ pub(crate) unsafe fn codegen(
             } else {
                 llmod
             };
-            unsafe {
-                with_codegen(tm, llmod, config.no_builtins, |cpm| {
-                    write_output_file(
-                        dcx,
-                        tm,
-                        cpm,
-                        llmod,
-                        &path,
-                        None,
-                        llvm::FileType::AssemblyFile,
-                        &cgcx.prof,
-                        config.verify_llvm_ir,
-                    )
-                })?;
-            }
+            write_output_file(
+                dcx,
+                tm,
+                config.no_builtins,
+                llmod,
+                &path,
+                None,
+                llvm::FileType::AssemblyFile,
+                &cgcx.prof,
+                config.verify_llvm_ir,
+            )?;
         }
 
         match config.emit_obj {
@@ -925,21 +912,17 @@ pub(crate) unsafe fn codegen(
                     (_, SplitDwarfKind::Split) => Some(dwo_out.as_path()),
                 };
 
-                unsafe {
-                    with_codegen(tm, llmod, config.no_builtins, |cpm| {
-                        write_output_file(
-                            dcx,
-                            tm,
-                            cpm,
-                            llmod,
-                            &obj_out,
-                            dwo_out,
-                            llvm::FileType::ObjectFile,
-                            &cgcx.prof,
-                            config.verify_llvm_ir,
-                        )
-                    })?;
-                }
+                write_output_file(
+                    dcx,
+                    tm,
+                    config.no_builtins,
+                    llmod,
+                    &obj_out,
+                    dwo_out,
+                    llvm::FileType::ObjectFile,
+                    &cgcx.prof,
+                    config.verify_llvm_ir,
+                )?;
             }
 
             EmitObj::Bitcode => {
@@ -1066,24 +1049,18 @@ unsafe fn embed_bitcode(
         {
             // We don't need custom section flags, create LLVM globals.
             let llconst = common::bytes_in_context(llcx, bitcode);
-            let llglobal = llvm::LLVMAddGlobal(
-                llmod,
-                common::val_ty(llconst),
-                c"rustc.embedded.module".as_ptr(),
-            );
-            llvm::LLVMSetInitializer(llglobal, llconst);
+            let llglobal =
+                llvm::add_global(llmod, common::val_ty(llconst), c"rustc.embedded.module");
+            llvm::set_initializer(llglobal, llconst);
 
             llvm::set_section(llglobal, bitcode_section_name(cgcx));
             llvm::set_linkage(llglobal, llvm::Linkage::PrivateLinkage);
             llvm::LLVMSetGlobalConstant(llglobal, llvm::True);
 
             let llconst = common::bytes_in_context(llcx, cmdline.as_bytes());
-            let llglobal = llvm::LLVMAddGlobal(
-                llmod,
-                common::val_ty(llconst),
-                c"rustc.embedded.cmdline".as_ptr(),
-            );
-            llvm::LLVMSetInitializer(llglobal, llconst);
+            let llglobal =
+                llvm::add_global(llmod, common::val_ty(llconst), c"rustc.embedded.cmdline");
+            llvm::set_initializer(llglobal, llconst);
             let section = if cgcx.target_is_like_osx {
                 c"__LLVM,__cmdline"
             } else if cgcx.target_is_like_aix {
@@ -1123,31 +1100,29 @@ fn create_msvc_imps(
     // underscores added in front).
     let prefix = if cgcx.target_arch == "x86" { "\x01__imp__" } else { "\x01__imp_" };
 
-    unsafe {
-        let ptr_ty = Type::ptr_llcx(llcx);
-        let globals = base::iter_globals(llmod)
-            .filter(|&val| {
-                llvm::get_linkage(val) == llvm::Linkage::ExternalLinkage
-                    && llvm::LLVMIsDeclaration(val) == 0
-            })
-            .filter_map(|val| {
-                // Exclude some symbols that we know are not Rust symbols.
-                let name = llvm::get_value_name(val);
-                if ignored(name) { None } else { Some((val, name)) }
-            })
-            .map(move |(val, name)| {
-                let mut imp_name = prefix.as_bytes().to_vec();
-                imp_name.extend(name);
-                let imp_name = CString::new(imp_name).unwrap();
-                (imp_name, val)
-            })
-            .collect::<Vec<_>>();
+    let ptr_ty = Type::ptr_llcx(llcx);
+    let globals = base::iter_globals(llmod)
+        .filter(|&val| {
+            llvm::get_linkage(val) == llvm::Linkage::ExternalLinkage && !llvm::is_declaration(val)
+        })
+        .filter_map(|val| {
+            // Exclude some symbols that we know are not Rust symbols.
+            let name = llvm::get_value_name(val);
+            if ignored(name) { None } else { Some((val, name)) }
+        })
+        .map(move |(val, name)| {
+            let mut imp_name = prefix.as_bytes().to_vec();
+            imp_name.extend(name);
+            let imp_name = CString::new(imp_name).unwrap();
+            (imp_name, val)
+        })
+        .collect::<Vec<_>>();
 
-        for (imp_name, val) in globals {
-            let imp = llvm::LLVMAddGlobal(llmod, ptr_ty, imp_name.as_ptr());
-            llvm::LLVMSetInitializer(imp, val);
-            llvm::set_linkage(imp, llvm::Linkage::ExternalLinkage);
-        }
+    for (imp_name, val) in globals {
+        let imp = llvm::add_global(llmod, ptr_ty, &imp_name);
+
+        llvm::set_initializer(imp, val);
+        llvm::set_linkage(imp, llvm::Linkage::ExternalLinkage);
     }
 
     // Use this function to exclude certain symbols from `__imp` generation.
diff --git a/compiler/rustc_codegen_llvm/src/base.rs b/compiler/rustc_codegen_llvm/src/base.rs
index d05faf5577b..d35c7945bae 100644
--- a/compiler/rustc_codegen_llvm/src/base.rs
+++ b/compiler/rustc_codegen_llvm/src/base.rs
@@ -157,9 +157,7 @@ pub(crate) fn linkage_to_llvm(linkage: Linkage) -> llvm::Linkage {
         Linkage::LinkOnceODR => llvm::Linkage::LinkOnceODRLinkage,
         Linkage::WeakAny => llvm::Linkage::WeakAnyLinkage,
         Linkage::WeakODR => llvm::Linkage::WeakODRLinkage,
-        Linkage::Appending => llvm::Linkage::AppendingLinkage,
         Linkage::Internal => llvm::Linkage::InternalLinkage,
-        Linkage::Private => llvm::Linkage::PrivateLinkage,
         Linkage::ExternalWeak => llvm::Linkage::ExternalWeakLinkage,
         Linkage::Common => llvm::Linkage::CommonLinkage,
     }
diff --git a/compiler/rustc_codegen_llvm/src/builder.rs b/compiler/rustc_codegen_llvm/src/builder.rs
index 2d007416263..57f09b1fa2f 100644
--- a/compiler/rustc_codegen_llvm/src/builder.rs
+++ b/compiler/rustc_codegen_llvm/src/builder.rs
@@ -421,6 +421,51 @@ impl<'a, 'll, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
         unchecked_umul(x, y) => LLVMBuildNUWMul,
     }
 
+    fn unchecked_suadd(&mut self, a: &'ll Value, b: &'ll Value) -> &'ll Value {
+        unsafe {
+            let add = llvm::LLVMBuildAdd(self.llbuilder, a, b, UNNAMED);
+            if llvm::LLVMIsAInstruction(add).is_some() {
+                llvm::LLVMSetNUW(add, True);
+                llvm::LLVMSetNSW(add, True);
+            }
+            add
+        }
+    }
+    fn unchecked_susub(&mut self, a: &'ll Value, b: &'ll Value) -> &'ll Value {
+        unsafe {
+            let sub = llvm::LLVMBuildSub(self.llbuilder, a, b, UNNAMED);
+            if llvm::LLVMIsAInstruction(sub).is_some() {
+                llvm::LLVMSetNUW(sub, True);
+                llvm::LLVMSetNSW(sub, True);
+            }
+            sub
+        }
+    }
+    fn unchecked_sumul(&mut self, a: &'ll Value, b: &'ll Value) -> &'ll Value {
+        unsafe {
+            let mul = llvm::LLVMBuildMul(self.llbuilder, a, b, UNNAMED);
+            if llvm::LLVMIsAInstruction(mul).is_some() {
+                llvm::LLVMSetNUW(mul, True);
+                llvm::LLVMSetNSW(mul, True);
+            }
+            mul
+        }
+    }
+
+    fn or_disjoint(&mut self, a: &'ll Value, b: &'ll Value) -> &'ll Value {
+        unsafe {
+            let or = llvm::LLVMBuildOr(self.llbuilder, a, b, UNNAMED);
+
+            // If a and b are both values, then `or` is a value, rather than
+            // an instruction, so we need to check before setting the flag.
+            // (See also `LLVMBuildNUWNeg` which also needs a check.)
+            if llvm::LLVMIsAInstruction(or).is_some() {
+                llvm::LLVMSetIsDisjoint(or, True);
+            }
+            or
+        }
+    }
+
     set_math_builder_methods! {
         fadd_fast(x, y) => (LLVMBuildFAdd, LLVMRustSetFastMath),
         fsub_fast(x, y) => (LLVMBuildFSub, LLVMRustSetFastMath),
@@ -529,7 +574,8 @@ impl<'a, 'll, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
         unsafe {
             let alloca = llvm::LLVMBuildAlloca(bx.llbuilder, ty, UNNAMED);
             llvm::LLVMSetAlignment(alloca, align.bytes() as c_uint);
-            alloca
+            // Cast to default addrspace if necessary
+            llvm::LLVMBuildPointerCast(bx.llbuilder, alloca, self.cx().type_ptr(), UNNAMED)
         }
     }
 
@@ -538,7 +584,8 @@ impl<'a, 'll, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
             let alloca =
                 llvm::LLVMBuildArrayAlloca(self.llbuilder, self.cx().type_i8(), size, UNNAMED);
             llvm::LLVMSetAlignment(alloca, align.bytes() as c_uint);
-            alloca
+            // Cast to default addrspace if necessary
+            llvm::LLVMBuildPointerCast(self.llbuilder, alloca, self.cx().type_ptr(), UNNAMED)
         }
     }
 
diff --git a/compiler/rustc_codegen_llvm/src/builder/autodiff.rs b/compiler/rustc_codegen_llvm/src/builder/autodiff.rs
index 9e8e4e1c567..b2c1088e3fc 100644
--- a/compiler/rustc_codegen_llvm/src/builder/autodiff.rs
+++ b/compiler/rustc_codegen_llvm/src/builder/autodiff.rs
@@ -4,10 +4,9 @@ use rustc_ast::expand::autodiff_attrs::{AutoDiffAttrs, AutoDiffItem, DiffActivit
 use rustc_codegen_ssa::ModuleCodegen;
 use rustc_codegen_ssa::back::write::ModuleConfig;
 use rustc_errors::FatalError;
-use rustc_session::config::Lto;
 use tracing::{debug, trace};
 
-use crate::back::write::{llvm_err, llvm_optimize};
+use crate::back::write::llvm_err;
 use crate::builder::SBuilder;
 use crate::context::SimpleCx;
 use crate::declare::declare_simple_fn;
@@ -53,8 +52,6 @@ fn generate_enzyme_call<'ll>(
     let mut ad_name: String = match attrs.mode {
         DiffMode::Forward => "__enzyme_fwddiff",
         DiffMode::Reverse => "__enzyme_autodiff",
-        DiffMode::ForwardFirst => "__enzyme_fwddiff",
-        DiffMode::ReverseFirst => "__enzyme_autodiff",
         _ => panic!("logic bug in autodiff, unrecognized mode"),
     }
     .to_string();
@@ -153,7 +150,7 @@ fn generate_enzyme_call<'ll>(
             _ => {}
         }
 
-        trace!("matching autodiff arguments");
+        debug!("matching autodiff arguments");
         // We now handle the issue that Rust level arguments not always match the llvm-ir level
         // arguments. A slice, `&[f32]`, for example, is represented as a pointer and a length on
         // llvm-ir level. The number of activities matches the number of Rust level arguments, so we
@@ -164,10 +161,10 @@ fn generate_enzyme_call<'ll>(
         let mut activity_pos = 0;
         let outer_args: Vec<&llvm::Value> = get_params(outer_fn);
         while activity_pos < inputs.len() {
-            let activity = inputs[activity_pos as usize];
+            let diff_activity = inputs[activity_pos as usize];
             // Duplicated arguments received a shadow argument, into which enzyme will write the
             // gradient.
-            let (activity, duplicated): (&Metadata, bool) = match activity {
+            let (activity, duplicated): (&Metadata, bool) = match diff_activity {
                 DiffActivity::None => panic!("not a valid input activity"),
                 DiffActivity::Const => (enzyme_const, false),
                 DiffActivity::Active => (enzyme_out, false),
@@ -222,7 +219,15 @@ fn generate_enzyme_call<'ll>(
                     // A duplicated pointer will have the following two outer_fn arguments:
                     // (..., ptr, ptr, ...). We add the following llvm-ir to our __enzyme call:
                     // (..., metadata! enzyme_dup, ptr, ptr, ...).
-                    assert!(llvm::LLVMRustGetTypeKind(next_outer_ty) == llvm::TypeKind::Pointer);
+                    if matches!(
+                        diff_activity,
+                        DiffActivity::Duplicated | DiffActivity::DuplicatedOnly
+                    ) {
+                        assert!(
+                            llvm::LLVMRustGetTypeKind(next_outer_ty) == llvm::TypeKind::Pointer
+                        );
+                    }
+                    // In the case of Dual we don't have assumptions, e.g. f32 would be valid.
                     args.push(next_outer_arg);
                     outer_pos += 2;
                     activity_pos += 1;
@@ -277,7 +282,7 @@ pub(crate) fn differentiate<'ll>(
     module: &'ll ModuleCodegen<ModuleLlvm>,
     cgcx: &CodegenContext<LlvmCodegenBackend>,
     diff_items: Vec<AutoDiffItem>,
-    config: &ModuleConfig,
+    _config: &ModuleConfig,
 ) -> Result<(), FatalError> {
     for item in &diff_items {
         trace!("{}", item);
@@ -291,20 +296,26 @@ pub(crate) fn differentiate<'ll>(
         let name = item.source.clone();
         let fn_def: Option<&llvm::Value> = cx.get_function(&name);
         let Some(fn_def) = fn_def else {
-            return Err(llvm_err(diag_handler.handle(), LlvmError::PrepareAutoDiff {
-                src: item.source.clone(),
-                target: item.target.clone(),
-                error: "could not find source function".to_owned(),
-            }));
+            return Err(llvm_err(
+                diag_handler.handle(),
+                LlvmError::PrepareAutoDiff {
+                    src: item.source.clone(),
+                    target: item.target.clone(),
+                    error: "could not find source function".to_owned(),
+                },
+            ));
         };
         debug!(?item.target);
         let fn_target: Option<&llvm::Value> = cx.get_function(&item.target);
         let Some(fn_target) = fn_target else {
-            return Err(llvm_err(diag_handler.handle(), LlvmError::PrepareAutoDiff {
-                src: item.source.clone(),
-                target: item.target.clone(),
-                error: "could not find target function".to_owned(),
-            }));
+            return Err(llvm_err(
+                diag_handler.handle(),
+                LlvmError::PrepareAutoDiff {
+                    src: item.source.clone(),
+                    target: item.target.clone(),
+                    error: "could not find target function".to_owned(),
+                },
+            ));
         };
 
         generate_enzyme_call(&cx, fn_def, fn_target, item.attrs.clone());
@@ -312,29 +323,6 @@ pub(crate) fn differentiate<'ll>(
 
     // FIXME(ZuseZ4): support SanitizeHWAddress and prevent illegal/unsupported opts
 
-    if let Some(opt_level) = config.opt_level {
-        let opt_stage = match cgcx.lto {
-            Lto::Fat => llvm::OptStage::PreLinkFatLTO,
-            Lto::Thin | Lto::ThinLocal => llvm::OptStage::PreLinkThinLTO,
-            _ if cgcx.opts.cg.linker_plugin_lto.enabled() => llvm::OptStage::PreLinkThinLTO,
-            _ => llvm::OptStage::PreLinkNoLTO,
-        };
-        // This is our second opt call, so now we run all opts,
-        // to make sure we get the best performance.
-        let skip_size_increasing_opts = false;
-        trace!("running Module Optimization after differentiation");
-        unsafe {
-            llvm_optimize(
-                cgcx,
-                diag_handler.handle(),
-                module,
-                config,
-                opt_level,
-                opt_stage,
-                skip_size_increasing_opts,
-            )?
-        };
-    }
     trace!("done with differentiate()");
 
     Ok(())
diff --git a/compiler/rustc_codegen_llvm/src/common.rs b/compiler/rustc_codegen_llvm/src/common.rs
index 8c94a46ebf3..78b3a7f8541 100644
--- a/compiler/rustc_codegen_llvm/src/common.rs
+++ b/compiler/rustc_codegen_llvm/src/common.rs
@@ -219,8 +219,8 @@ impl<'ll, 'tcx> ConstCodegenMethods<'tcx> for CodegenCx<'ll, 'tcx> {
                 let g = self.define_global(&sym, self.val_ty(sc)).unwrap_or_else(|| {
                     bug!("symbol `{}` is already defined", sym);
                 });
+                llvm::set_initializer(g, sc);
                 unsafe {
-                    llvm::LLVMSetInitializer(g, sc);
                     llvm::LLVMSetGlobalConstant(g, True);
                     llvm::LLVMSetUnnamedAddress(g, llvm::UnnamedAddr::Global);
                 }
diff --git a/compiler/rustc_codegen_llvm/src/consts.rs b/compiler/rustc_codegen_llvm/src/consts.rs
index c6855dd42e5..4a5491ec7a1 100644
--- a/compiler/rustc_codegen_llvm/src/consts.rs
+++ b/compiler/rustc_codegen_llvm/src/consts.rs
@@ -191,7 +191,7 @@ fn check_and_apply_linkage<'ll, 'tcx>(
             })
         });
         llvm::set_linkage(g2, llvm::Linkage::InternalLinkage);
-        unsafe { llvm::LLVMSetInitializer(g2, g1) };
+        llvm::set_initializer(g2, g1);
         g2
     } else if cx.tcx.sess.target.arch == "x86"
         && common::is_mingw_gnu_toolchain(&cx.tcx.sess.target)
@@ -235,7 +235,7 @@ impl<'ll> CodegenCx<'ll, '_> {
             }
             _ => self.define_private_global(self.val_ty(cv)),
         };
-        unsafe { llvm::LLVMSetInitializer(gv, cv) };
+        llvm::set_initializer(gv, cv);
         set_global_alignment(self, gv, align);
         llvm::SetUnnamedAddress(gv, llvm::UnnamedAddr::Global);
         gv
@@ -458,7 +458,7 @@ impl<'ll> CodegenCx<'ll, '_> {
                 new_g
             };
             set_global_alignment(self, g, alloc.align);
-            llvm::LLVMSetInitializer(g, v);
+            llvm::set_initializer(g, v);
 
             if self.should_assume_dso_local(g, true) {
                 llvm::LLVMRustSetDSOLocal(g, true);
diff --git a/compiler/rustc_codegen_llvm/src/context.rs b/compiler/rustc_codegen_llvm/src/context.rs
index ebb4b421ad0..e7952bc95e7 100644
--- a/compiler/rustc_codegen_llvm/src/context.rs
+++ b/compiler/rustc_codegen_llvm/src/context.rs
@@ -622,12 +622,10 @@ impl<'ll, 'tcx> CodegenCx<'ll, 'tcx> {
     pub(crate) fn create_used_variable_impl(&self, name: &'static CStr, values: &[&'ll Value]) {
         let array = self.const_array(self.type_ptr(), values);
 
-        unsafe {
-            let g = llvm::LLVMAddGlobal(self.llmod, self.val_ty(array), name.as_ptr());
-            llvm::LLVMSetInitializer(g, array);
-            llvm::set_linkage(g, llvm::Linkage::AppendingLinkage);
-            llvm::set_section(g, c"llvm.metadata");
-        }
+        let g = llvm::add_global(self.llmod, self.val_ty(array), name);
+        llvm::set_initializer(g, array);
+        llvm::set_linkage(g, llvm::Linkage::AppendingLinkage);
+        llvm::set_section(g, c"llvm.metadata");
     }
 }
 impl<'ll> SimpleCx<'ll> {
diff --git a/compiler/rustc_codegen_llvm/src/coverageinfo/mapgen/covfun.rs b/compiler/rustc_codegen_llvm/src/coverageinfo/mapgen/covfun.rs
index 460a4664615..c53ea6d4666 100644
--- a/compiler/rustc_codegen_llvm/src/coverageinfo/mapgen/covfun.rs
+++ b/compiler/rustc_codegen_llvm/src/coverageinfo/mapgen/covfun.rs
@@ -11,7 +11,8 @@ use rustc_codegen_ssa::traits::{
     BaseTypeCodegenMethods, ConstCodegenMethods, StaticCodegenMethods,
 };
 use rustc_middle::mir::coverage::{
-    CovTerm, CoverageIdsInfo, Expression, FunctionCoverageInfo, Mapping, MappingKind, Op,
+    BasicCoverageBlock, CovTerm, CoverageIdsInfo, Expression, FunctionCoverageInfo, Mapping,
+    MappingKind, Op,
 };
 use rustc_middle::ty::{Instance, TyCtxt};
 use rustc_span::Span;
@@ -53,7 +54,7 @@ pub(crate) fn prepare_covfun_record<'tcx>(
     let fn_cov_info = tcx.instance_mir(instance.def).function_coverage_info.as_deref()?;
     let ids_info = tcx.coverage_ids_info(instance.def)?;
 
-    let expressions = prepare_expressions(fn_cov_info, ids_info, is_used);
+    let expressions = prepare_expressions(ids_info);
 
     let mut covfun = CovfunRecord {
         mangled_function_name: tcx.symbol_name(instance).name,
@@ -75,26 +76,14 @@ pub(crate) fn prepare_covfun_record<'tcx>(
 }
 
 /// Convert the function's coverage-counter expressions into a form suitable for FFI.
-fn prepare_expressions(
-    fn_cov_info: &FunctionCoverageInfo,
-    ids_info: &CoverageIdsInfo,
-    is_used: bool,
-) -> Vec<ffi::CounterExpression> {
-    // If any counters or expressions were removed by MIR opts, replace their
-    // terms with zero.
-    let counter_for_term = |term| {
-        if !is_used || ids_info.is_zero_term(term) {
-            ffi::Counter::ZERO
-        } else {
-            ffi::Counter::from_term(term)
-        }
-    };
+fn prepare_expressions(ids_info: &CoverageIdsInfo) -> Vec<ffi::CounterExpression> {
+    let counter_for_term = ffi::Counter::from_term;
 
     // We know that LLVM will optimize out any unused expressions before
     // producing the final coverage map, so there's no need to do the same
     // thing on the Rust side unless we're confident we can do much better.
     // (See `CounterExpressionsMinimizer` in `CoverageMappingWriter.cpp`.)
-    fn_cov_info
+    ids_info
         .expressions
         .iter()
         .map(move |&Expression { lhs, op, rhs }| ffi::CounterExpression {
@@ -136,11 +125,16 @@ fn fill_region_tables<'tcx>(
 
     // For each counter/region pair in this function+file, convert it to a
     // form suitable for FFI.
-    let is_zero_term = |term| !covfun.is_used || ids_info.is_zero_term(term);
     for &Mapping { ref kind, span } in &fn_cov_info.mappings {
-        // If the mapping refers to counters/expressions that were removed by
-        // MIR opts, replace those occurrences with zero.
-        let kind = kind.map_terms(|term| if is_zero_term(term) { CovTerm::Zero } else { term });
+        // If this function is unused, replace all counters with zero.
+        let counter_for_bcb = |bcb: BasicCoverageBlock| -> ffi::Counter {
+            let term = if covfun.is_used {
+                ids_info.term_for_bcb[bcb].expect("every BCB in a mapping was given a term")
+            } else {
+                CovTerm::Zero
+            };
+            ffi::Counter::from_term(term)
+        };
 
         // Convert the `Span` into coordinates that we can pass to LLVM, or
         // discard the span if conversion fails. In rare, cases _all_ of a
@@ -154,23 +148,22 @@ fn fill_region_tables<'tcx>(
             continue;
         }
 
-        match kind {
-            MappingKind::Code(term) => {
-                code_regions
-                    .push(ffi::CodeRegion { cov_span, counter: ffi::Counter::from_term(term) });
+        match *kind {
+            MappingKind::Code { bcb } => {
+                code_regions.push(ffi::CodeRegion { cov_span, counter: counter_for_bcb(bcb) });
             }
-            MappingKind::Branch { true_term, false_term } => {
+            MappingKind::Branch { true_bcb, false_bcb } => {
                 branch_regions.push(ffi::BranchRegion {
                     cov_span,
-                    true_counter: ffi::Counter::from_term(true_term),
-                    false_counter: ffi::Counter::from_term(false_term),
+                    true_counter: counter_for_bcb(true_bcb),
+                    false_counter: counter_for_bcb(false_bcb),
                 });
             }
-            MappingKind::MCDCBranch { true_term, false_term, mcdc_params } => {
+            MappingKind::MCDCBranch { true_bcb, false_bcb, mcdc_params } => {
                 mcdc_branch_regions.push(ffi::MCDCBranchRegion {
                     cov_span,
-                    true_counter: ffi::Counter::from_term(true_term),
-                    false_counter: ffi::Counter::from_term(false_term),
+                    true_counter: counter_for_bcb(true_bcb),
+                    false_counter: counter_for_bcb(false_bcb),
                     mcdc_branch_params: ffi::mcdc::BranchParameters::from(mcdc_params),
                 });
             }
diff --git a/compiler/rustc_codegen_llvm/src/coverageinfo/mod.rs b/compiler/rustc_codegen_llvm/src/coverageinfo/mod.rs
index 021108cd51c..ea7f581a3cb 100644
--- a/compiler/rustc_codegen_llvm/src/coverageinfo/mod.rs
+++ b/compiler/rustc_codegen_llvm/src/coverageinfo/mod.rs
@@ -160,21 +160,12 @@ impl<'tcx> CoverageInfoBuilderMethods<'tcx> for Builder<'_, '_, 'tcx> {
             CoverageKind::SpanMarker | CoverageKind::BlockMarker { .. } => unreachable!(
                 "marker statement {kind:?} should have been removed by CleanupPostBorrowck"
             ),
-            CoverageKind::CounterIncrement { id } => {
-                // The number of counters passed to `llvm.instrprof.increment` might
-                // be smaller than the number originally inserted by the instrumentor,
-                // if some high-numbered counters were removed by MIR optimizations.
-                // If so, LLVM's profiler runtime will use fewer physical counters.
-                let num_counters = ids_info.num_counters_after_mir_opts();
-                assert!(
-                    num_counters as usize <= function_coverage_info.num_counters,
-                    "num_counters disagreement: query says {num_counters} but function info only has {}",
-                    function_coverage_info.num_counters
-                );
-
+            CoverageKind::VirtualCounter { bcb }
+                if let Some(&id) = ids_info.phys_counter_for_node.get(&bcb) =>
+            {
                 let fn_name = bx.get_pgo_func_name_var(instance);
                 let hash = bx.const_u64(function_coverage_info.function_source_hash);
-                let num_counters = bx.const_u32(num_counters);
+                let num_counters = bx.const_u32(ids_info.num_counters);
                 let index = bx.const_u32(id.as_u32());
                 debug!(
                     "codegen intrinsic instrprof.increment(fn_name={:?}, hash={:?}, num_counters={:?}, index={:?})",
@@ -182,10 +173,8 @@ impl<'tcx> CoverageInfoBuilderMethods<'tcx> for Builder<'_, '_, 'tcx> {
                 );
                 bx.instrprof_increment(fn_name, hash, num_counters, index);
             }
-            CoverageKind::ExpressionUsed { id: _ } => {
-                // Expression-used statements are markers that are handled by
-                // `coverage_ids_info`, so there's nothing to codegen here.
-            }
+            // If a BCB doesn't have an associated physical counter, there's nothing to codegen.
+            CoverageKind::VirtualCounter { .. } => {}
             CoverageKind::CondBitmapUpdate { index, decision_depth } => {
                 let cond_bitmap = coverage_cx
                     .try_get_mcdc_condition_bitmap(&instance, decision_depth)
diff --git a/compiler/rustc_codegen_llvm/src/debuginfo/create_scope_map.rs b/compiler/rustc_codegen_llvm/src/debuginfo/create_scope_map.rs
index 11eb9651af6..f52991b3697 100644
--- a/compiler/rustc_codegen_llvm/src/debuginfo/create_scope_map.rs
+++ b/compiler/rustc_codegen_llvm/src/debuginfo/create_scope_map.rs
@@ -127,7 +127,7 @@ fn make_mir_scope<'ll, 'tcx>(
             })
         }
         None => unsafe {
-            llvm::LLVMRustDIBuilderCreateLexicalBlock(
+            llvm::LLVMDIBuilderCreateLexicalBlock(
                 DIB(cx),
                 parent_scope.dbg_scope,
                 file_metadata,
diff --git a/compiler/rustc_codegen_llvm/src/debuginfo/gdb.rs b/compiler/rustc_codegen_llvm/src/debuginfo/gdb.rs
index 2c9f1cda13a..54c5d445f66 100644
--- a/compiler/rustc_codegen_llvm/src/debuginfo/gdb.rs
+++ b/compiler/rustc_codegen_llvm/src/debuginfo/gdb.rs
@@ -73,7 +73,7 @@ pub(crate) fn get_or_insert_gdb_debug_scripts_section_global<'ll>(
                 .define_global(section_var_name, llvm_type)
                 .unwrap_or_else(|| bug!("symbol `{}` is already defined", section_var_name));
             llvm::set_section(section_var, c".debug_gdb_scripts");
-            llvm::LLVMSetInitializer(section_var, cx.const_bytes(section_contents));
+            llvm::set_initializer(section_var, cx.const_bytes(section_contents));
             llvm::LLVMSetGlobalConstant(section_var, llvm::True);
             llvm::LLVMSetUnnamedAddress(section_var, llvm::UnnamedAddr::Global);
             llvm::set_linkage(section_var, llvm::Linkage::LinkOnceODRLinkage);
diff --git a/compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs b/compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs
index 3a0c7f007bd..59c3fe635d0 100644
--- a/compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs
+++ b/compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs
@@ -319,19 +319,16 @@ fn build_subroutine_type_di_node<'ll, 'tcx>(
     // This is actually a function pointer, so wrap it in pointer DI.
     let name = compute_debuginfo_type_name(cx.tcx, fn_ty, false);
     let (size, align) = match fn_ty.kind() {
-        ty::FnDef(..) => (0, 1),
-        ty::FnPtr(..) => (
-            cx.tcx.data_layout.pointer_size.bits(),
-            cx.tcx.data_layout.pointer_align.abi.bits() as u32,
-        ),
+        ty::FnDef(..) => (Size::ZERO, Align::ONE),
+        ty::FnPtr(..) => (cx.tcx.data_layout.pointer_size, cx.tcx.data_layout.pointer_align.abi),
         _ => unreachable!(),
     };
     let di_node = unsafe {
         llvm::LLVMRustDIBuilderCreatePointerType(
             DIB(cx),
             fn_di_node,
-            size,
-            align,
+            size.bits(),
+            align.bits() as u32,
             0, // Ignore DWARF address space.
             name.as_c_char_ptr(),
             name.len(),
@@ -931,7 +928,7 @@ pub(crate) fn build_compile_unit_di_node<'ll, 'tcx>(
 
     unsafe {
         let compile_unit_file = llvm::LLVMRustDIBuilderCreateFile(
-            debug_context.builder,
+            debug_context.builder.as_ref(),
             name_in_debuginfo.as_c_char_ptr(),
             name_in_debuginfo.len(),
             work_dir.as_c_char_ptr(),
@@ -944,7 +941,7 @@ pub(crate) fn build_compile_unit_di_node<'ll, 'tcx>(
         );
 
         let unit_metadata = llvm::LLVMRustDIBuilderCreateCompileUnit(
-            debug_context.builder,
+            debug_context.builder.as_ref(),
             dwarf_const::DW_LANG_Rust,
             compile_unit_file,
             producer.as_c_char_ptr(),
@@ -1641,7 +1638,14 @@ pub(crate) fn extend_scope_to_file<'ll>(
     file: &SourceFile,
 ) -> &'ll DILexicalBlock {
     let file_metadata = file_metadata(cx, file);
-    unsafe { llvm::LLVMRustDIBuilderCreateLexicalBlockFile(DIB(cx), scope_metadata, file_metadata) }
+    unsafe {
+        llvm::LLVMDIBuilderCreateLexicalBlockFile(
+            DIB(cx),
+            scope_metadata,
+            file_metadata,
+            /* Discriminator (default) */ 0u32,
+        )
+    }
 }
 
 fn tuple_field_name(field_index: usize) -> Cow<'static, str> {
diff --git a/compiler/rustc_codegen_llvm/src/debuginfo/metadata/enums/native.rs b/compiler/rustc_codegen_llvm/src/debuginfo/metadata/enums/native.rs
index 11824398f24..187d97c54c8 100644
--- a/compiler/rustc_codegen_llvm/src/debuginfo/metadata/enums/native.rs
+++ b/compiler/rustc_codegen_llvm/src/debuginfo/metadata/enums/native.rs
@@ -437,6 +437,12 @@ fn build_enum_variant_member_di_node<'ll, 'tcx>(
         .source_info
         .unwrap_or_else(|| (unknown_file_metadata(cx), UNKNOWN_LINE_NUMBER));
 
+    let discr = discr_value.opt_single_val().map(|value| {
+        let tag_base_type = tag_base_type(cx.tcx, enum_type_and_layout);
+        let size = cx.size_of(tag_base_type);
+        cx.const_uint_big(cx.type_ix(size.bits()), value)
+    });
+
     unsafe {
         llvm::LLVMRustDIBuilderCreateVariantMemberType(
             DIB(cx),
@@ -448,7 +454,7 @@ fn build_enum_variant_member_di_node<'ll, 'tcx>(
             enum_type_and_layout.size.bits(),
             enum_type_and_layout.align.abi.bits() as u32,
             Size::ZERO.bits(),
-            discr_value.opt_single_val().map(|value| cx.const_u128(value)),
+            discr,
             DIFlags::FlagZero,
             variant_member_info.variant_struct_type_di_node,
         )
diff --git a/compiler/rustc_codegen_llvm/src/debuginfo/mod.rs b/compiler/rustc_codegen_llvm/src/debuginfo/mod.rs
index b1ce52667bd..17f2d5f4e73 100644
--- a/compiler/rustc_codegen_llvm/src/debuginfo/mod.rs
+++ b/compiler/rustc_codegen_llvm/src/debuginfo/mod.rs
@@ -2,6 +2,7 @@
 
 use std::cell::{OnceCell, RefCell};
 use std::ops::Range;
+use std::sync::Arc;
 use std::{iter, ptr};
 
 use libc::c_uint;
@@ -10,7 +11,6 @@ use rustc_codegen_ssa::debuginfo::type_names;
 use rustc_codegen_ssa::mir::debuginfo::VariableKind::*;
 use rustc_codegen_ssa::mir::debuginfo::{DebugScope, FunctionDebugContext, VariableKind};
 use rustc_codegen_ssa::traits::*;
-use rustc_data_structures::sync::Lrc;
 use rustc_data_structures::unord::UnordMap;
 use rustc_hir::def_id::{DefId, DefIdMap};
 use rustc_index::IndexVec;
@@ -34,7 +34,7 @@ use crate::builder::Builder;
 use crate::common::{AsCCharPtr, CodegenCx};
 use crate::llvm;
 use crate::llvm::debuginfo::{
-    DIArray, DIBuilder, DIFile, DIFlags, DILexicalBlock, DILocation, DISPFlags, DIScope, DIType,
+    DIArray, DIBuilderBox, DIFile, DIFlags, DILexicalBlock, DILocation, DISPFlags, DIScope, DIType,
     DIVariable,
 };
 use crate::value::Value;
@@ -61,7 +61,7 @@ const DW_TAG_arg_variable: c_uint = 0x101;
 /// A context object for maintaining all state needed by the debuginfo module.
 pub(crate) struct CodegenUnitDebugContext<'ll, 'tcx> {
     llmod: &'ll llvm::Module,
-    builder: &'ll mut DIBuilder<'ll>,
+    builder: DIBuilderBox<'ll>,
     created_files: RefCell<UnordMap<Option<(StableSourceFileId, SourceFileHash)>, &'ll DIFile>>,
 
     type_map: metadata::TypeMap<'ll, 'tcx>,
@@ -69,18 +69,10 @@ pub(crate) struct CodegenUnitDebugContext<'ll, 'tcx> {
     recursion_marker_type: OnceCell<&'ll DIType>,
 }
 
-impl Drop for CodegenUnitDebugContext<'_, '_> {
-    fn drop(&mut self) {
-        unsafe {
-            llvm::LLVMRustDIBuilderDispose(&mut *(self.builder as *mut _));
-        }
-    }
-}
-
 impl<'ll, 'tcx> CodegenUnitDebugContext<'ll, 'tcx> {
     pub(crate) fn new(llmod: &'ll llvm::Module) -> Self {
         debug!("CodegenUnitDebugContext::new");
-        let builder = unsafe { llvm::LLVMRustDIBuilderCreate(llmod) };
+        let builder = DIBuilderBox::new(llmod);
         // DIBuilder inherits context from the module, so we'd better use the same one
         CodegenUnitDebugContext {
             llmod,
@@ -93,7 +85,7 @@ impl<'ll, 'tcx> CodegenUnitDebugContext<'ll, 'tcx> {
     }
 
     pub(crate) fn finalize(&self, sess: &Session) {
-        unsafe { llvm::LLVMRustDIBuilderFinalize(self.builder) };
+        unsafe { llvm::LLVMDIBuilderFinalize(self.builder.as_ref()) };
 
         match sess.target.debuginfo_kind {
             DebuginfoKind::Dwarf | DebuginfoKind::DwarfDsym => {
@@ -105,7 +97,11 @@ impl<'ll, 'tcx> CodegenUnitDebugContext<'ll, 'tcx> {
                 // Android has the same issue (#22398)
                 llvm::add_module_flag_u32(
                     self.llmod,
-                    llvm::ModuleFlagMergeBehavior::Warning,
+                    // In the case where multiple CGUs with different dwarf version
+                    // values are being merged together, such as with cross-crate
+                    // LTO, then we want to use the highest version of dwarf
+                    // we can. This matches Clang's behavior as well.
+                    llvm::ModuleFlagMergeBehavior::Max,
                     "Dwarf Version",
                     sess.dwarf_version(),
                 );
@@ -248,7 +244,7 @@ impl<'ll> DebugInfoBuilderMethods for Builder<'_, 'll, '_> {
 // `lookup_char_pos` return the right information instead.
 struct DebugLoc {
     /// Information about the original source file.
-    file: Lrc<SourceFile>,
+    file: Arc<SourceFile>,
     /// The (1-based) line number.
     line: u32,
     /// The (1-based) column number.
@@ -552,14 +548,17 @@ impl<'ll, 'tcx> DebugInfoCodegenMethods<'tcx> for CodegenCx<'ll, 'tcx> {
                 }
             }
 
-            let scope = namespace::item_namespace(cx, DefId {
-                krate: instance.def_id().krate,
-                index: cx
-                    .tcx
-                    .def_key(instance.def_id())
-                    .parent
-                    .expect("get_containing_scope: missing parent?"),
-            });
+            let scope = namespace::item_namespace(
+                cx,
+                DefId {
+                    krate: instance.def_id().krate,
+                    index: cx
+                        .tcx
+                        .def_key(instance.def_id())
+                        .parent
+                        .expect("get_containing_scope: missing parent?"),
+                },
+            );
             (scope, false)
         }
     }
@@ -582,7 +581,7 @@ impl<'ll, 'tcx> DebugInfoCodegenMethods<'tcx> for CodegenCx<'ll, 'tcx> {
             (line, col)
         };
 
-        unsafe { llvm::LLVMRustDIBuilderCreateDebugLocation(line, col, scope, inlined_at) }
+        unsafe { llvm::LLVMDIBuilderCreateDebugLocation(self.llcx, line, col, scope, inlined_at) }
     }
 
     fn create_vtable_debuginfo(
@@ -641,7 +640,7 @@ impl<'ll, 'tcx> DebugInfoCodegenMethods<'tcx> for CodegenCx<'ll, 'tcx> {
                 true,
                 DIFlags::FlagZero,
                 argument_index,
-                align.bytes() as u32,
+                align.bits() as u32,
             )
         }
     }
diff --git a/compiler/rustc_codegen_llvm/src/debuginfo/namespace.rs b/compiler/rustc_codegen_llvm/src/debuginfo/namespace.rs
index 33d9bc23890..b4d639368b0 100644
--- a/compiler/rustc_codegen_llvm/src/debuginfo/namespace.rs
+++ b/compiler/rustc_codegen_llvm/src/debuginfo/namespace.rs
@@ -5,7 +5,7 @@ use rustc_hir::def_id::DefId;
 use rustc_middle::ty::{self, Instance};
 
 use super::utils::{DIB, debug_context};
-use crate::common::{AsCCharPtr, CodegenCx};
+use crate::common::CodegenCx;
 use crate::llvm;
 use crate::llvm::debuginfo::DIScope;
 
@@ -33,12 +33,12 @@ pub(crate) fn item_namespace<'ll>(cx: &CodegenCx<'ll, '_>, def_id: DefId) -> &'l
     };
 
     let scope = unsafe {
-        llvm::LLVMRustDIBuilderCreateNameSpace(
+        llvm::LLVMDIBuilderCreateNameSpace(
             DIB(cx),
             parent_scope,
-            namespace_name_string.as_c_char_ptr(),
+            namespace_name_string.as_ptr(),
             namespace_name_string.len(),
-            false, // ExportSymbols (only relevant for C++ anonymous namespaces)
+            llvm::False, // ExportSymbols (only relevant for C++ anonymous namespaces)
         )
     };
 
diff --git a/compiler/rustc_codegen_llvm/src/debuginfo/utils.rs b/compiler/rustc_codegen_llvm/src/debuginfo/utils.rs
index 6e841293477..cc1d504b430 100644
--- a/compiler/rustc_codegen_llvm/src/debuginfo/utils.rs
+++ b/compiler/rustc_codegen_llvm/src/debuginfo/utils.rs
@@ -41,7 +41,7 @@ pub(crate) fn debug_context<'a, 'll, 'tcx>(
 #[inline]
 #[allow(non_snake_case)]
 pub(crate) fn DIB<'a, 'll>(cx: &'a CodegenCx<'ll, '_>) -> &'a DIBuilder<'ll> {
-    cx.dbg_cx.as_ref().unwrap().builder
+    cx.dbg_cx.as_ref().unwrap().builder.as_ref()
 }
 
 pub(crate) fn get_namespace_for_item<'ll>(cx: &CodegenCx<'ll, '_>, def_id: DefId) -> &'ll DIScope {
diff --git a/compiler/rustc_codegen_llvm/src/declare.rs b/compiler/rustc_codegen_llvm/src/declare.rs
index bdc83267cca..cebceef1b93 100644
--- a/compiler/rustc_codegen_llvm/src/declare.rs
+++ b/compiler/rustc_codegen_llvm/src/declare.rs
@@ -235,7 +235,7 @@ impl<'ll, 'tcx> CodegenCx<'ll, 'tcx> {
     /// name.
     pub(crate) fn get_defined_value(&self, name: &str) -> Option<&'ll Value> {
         self.get_declared_value(name).and_then(|val| {
-            let declaration = unsafe { llvm::LLVMIsDeclaration(val) != 0 };
+            let declaration = llvm::is_declaration(val);
             if !declaration { Some(val) } else { None }
         })
     }
diff --git a/compiler/rustc_codegen_llvm/src/errors.rs b/compiler/rustc_codegen_llvm/src/errors.rs
index f4c9491f758..97f49256165 100644
--- a/compiler/rustc_codegen_llvm/src/errors.rs
+++ b/compiler/rustc_codegen_llvm/src/errors.rs
@@ -131,8 +131,6 @@ pub enum LlvmError<'a> {
     LoadBitcode { name: CString },
     #[diag(codegen_llvm_write_thinlto_key)]
     WriteThinLtoKey { err: std::io::Error },
-    #[diag(codegen_llvm_multiple_source_dicompileunit)]
-    MultipleSourceDiCompileUnit,
     #[diag(codegen_llvm_prepare_thin_lto_module)]
     PrepareThinLtoModule,
     #[diag(codegen_llvm_parse_bitcode)]
@@ -155,9 +153,6 @@ impl<G: EmissionGuarantee> Diagnostic<'_, G> for WithLlvmError<'_> {
             PrepareThinLtoContext => fluent::codegen_llvm_prepare_thin_lto_context_with_llvm_err,
             LoadBitcode { .. } => fluent::codegen_llvm_load_bitcode_with_llvm_err,
             WriteThinLtoKey { .. } => fluent::codegen_llvm_write_thinlto_key_with_llvm_err,
-            MultipleSourceDiCompileUnit => {
-                fluent::codegen_llvm_multiple_source_dicompileunit_with_llvm_err
-            }
             PrepareThinLtoModule => fluent::codegen_llvm_prepare_thin_lto_module_with_llvm_err,
             ParseBitcode => fluent::codegen_llvm_parse_bitcode_with_llvm_err,
             PrepareAutoDiff { .. } => fluent::codegen_llvm_prepare_autodiff_with_llvm_err,
diff --git a/compiler/rustc_codegen_llvm/src/intrinsic.rs b/compiler/rustc_codegen_llvm/src/intrinsic.rs
index 43d6ccfcb4a..8b976885904 100644
--- a/compiler/rustc_codegen_llvm/src/intrinsic.rs
+++ b/compiler/rustc_codegen_llvm/src/intrinsic.rs
@@ -333,12 +333,15 @@ impl<'ll, 'tcx> IntrinsicCallBuilderMethods<'tcx> for Builder<'_, 'll, 'tcx> {
                     sym::prefetch_write_instruction => (1, 0),
                     _ => bug!(),
                 };
-                self.call_intrinsic("llvm.prefetch", &[
-                    args[0].immediate(),
-                    self.const_i32(rw),
-                    args[1].immediate(),
-                    self.const_i32(cache_type),
-                ])
+                self.call_intrinsic(
+                    "llvm.prefetch",
+                    &[
+                        args[0].immediate(),
+                        self.const_i32(rw),
+                        args[1].immediate(),
+                        self.const_i32(cache_type),
+                    ],
+                )
             }
             sym::carrying_mul_add => {
                 let (size, signed) = fn_args.type_at(0).int_size_and_signed(self.tcx);
@@ -396,10 +399,10 @@ impl<'ll, 'tcx> IntrinsicCallBuilderMethods<'tcx> for Builder<'_, 'll, 'tcx> {
                 match name {
                     sym::ctlz | sym::cttz => {
                         let y = self.const_bool(false);
-                        let ret = self.call_intrinsic(&format!("llvm.{name}.i{width}"), &[
-                            args[0].immediate(),
-                            y,
-                        ]);
+                        let ret = self.call_intrinsic(
+                            &format!("llvm.{name}.i{width}"),
+                            &[args[0].immediate(), y],
+                        );
 
                         self.intcast(ret, llret_ty, false)
                     }
@@ -416,24 +419,26 @@ impl<'ll, 'tcx> IntrinsicCallBuilderMethods<'tcx> for Builder<'_, 'll, 'tcx> {
                         self.intcast(ret, llret_ty, false)
                     }
                     sym::ctpop => {
-                        let ret = self.call_intrinsic(&format!("llvm.ctpop.i{width}"), &[
-                            args[0].immediate()
-                        ]);
+                        let ret = self.call_intrinsic(
+                            &format!("llvm.ctpop.i{width}"),
+                            &[args[0].immediate()],
+                        );
                         self.intcast(ret, llret_ty, false)
                     }
                     sym::bswap => {
                         if width == 8 {
                             args[0].immediate() // byte swap a u8/i8 is just a no-op
                         } else {
-                            self.call_intrinsic(&format!("llvm.bswap.i{width}"), &[
-                                args[0].immediate()
-                            ])
+                            self.call_intrinsic(
+                                &format!("llvm.bswap.i{width}"),
+                                &[args[0].immediate()],
+                            )
                         }
                     }
-                    sym::bitreverse => self
-                        .call_intrinsic(&format!("llvm.bitreverse.i{width}"), &[
-                            args[0].immediate()
-                        ]),
+                    sym::bitreverse => self.call_intrinsic(
+                        &format!("llvm.bitreverse.i{width}"),
+                        &[args[0].immediate()],
+                    ),
                     sym::rotate_left | sym::rotate_right => {
                         let is_left = name == sym::rotate_left;
                         let val = args[0].immediate();
@@ -500,11 +505,10 @@ impl<'ll, 'tcx> IntrinsicCallBuilderMethods<'tcx> for Builder<'_, 'll, 'tcx> {
 
             sym::compare_bytes => {
                 // Here we assume that the `memcmp` provided by the target is a NOP for size 0.
-                let cmp = self.call_intrinsic("memcmp", &[
-                    args[0].immediate(),
-                    args[1].immediate(),
-                    args[2].immediate(),
-                ]);
+                let cmp = self.call_intrinsic(
+                    "memcmp",
+                    &[args[0].immediate(), args[1].immediate(), args[2].immediate()],
+                );
                 // Some targets have `memcmp` returning `i16`, but the intrinsic is always `i32`.
                 self.sext(cmp, self.type_ix(32))
             }
@@ -820,7 +824,7 @@ fn codegen_msvc_try<'ll>(
         if bx.cx.tcx.sess.target.supports_comdat() {
             llvm::SetUniqueComdat(bx.llmod, tydesc);
         }
-        unsafe { llvm::LLVMSetInitializer(tydesc, type_info) };
+        llvm::set_initializer(tydesc, type_info);
 
         // The flag value of 8 indicates that we are catching the exception by
         // reference instead of by value. We can't use catch by value because
@@ -1305,14 +1309,17 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
     if let Some(cmp_op) = comparison {
         let (out_len, out_ty) = require_simd!(ret_ty, SimdReturn);
 
-        require!(in_len == out_len, InvalidMonomorphization::ReturnLengthInputType {
-            span,
-            name,
-            in_len,
-            in_ty,
-            ret_ty,
-            out_len
-        });
+        require!(
+            in_len == out_len,
+            InvalidMonomorphization::ReturnLengthInputType {
+                span,
+                name,
+                in_len,
+                in_ty,
+                ret_ty,
+                out_len
+            }
+        );
         require!(
             bx.type_kind(bx.element_type(llret_ty)) == TypeKind::Integer,
             InvalidMonomorphization::ReturnIntegerType { span, name, ret_ty, out_ty }
@@ -1333,21 +1340,14 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
         let n = idx.len() as u64;
 
         let (out_len, out_ty) = require_simd!(ret_ty, SimdReturn);
-        require!(out_len == n, InvalidMonomorphization::ReturnLength {
-            span,
-            name,
-            in_len: n,
-            ret_ty,
-            out_len
-        });
-        require!(in_elem == out_ty, InvalidMonomorphization::ReturnElement {
-            span,
-            name,
-            in_elem,
-            in_ty,
-            ret_ty,
-            out_ty
-        });
+        require!(
+            out_len == n,
+            InvalidMonomorphization::ReturnLength { span, name, in_len: n, ret_ty, out_len }
+        );
+        require!(
+            in_elem == out_ty,
+            InvalidMonomorphization::ReturnElement { span, name, in_elem, in_ty, ret_ty, out_ty }
+        );
 
         let total_len = in_len * 2;
 
@@ -1392,21 +1392,14 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
         };
 
         let (out_len, out_ty) = require_simd!(ret_ty, SimdReturn);
-        require!(out_len == n, InvalidMonomorphization::ReturnLength {
-            span,
-            name,
-            in_len: n,
-            ret_ty,
-            out_len
-        });
-        require!(in_elem == out_ty, InvalidMonomorphization::ReturnElement {
-            span,
-            name,
-            in_elem,
-            in_ty,
-            ret_ty,
-            out_ty
-        });
+        require!(
+            out_len == n,
+            InvalidMonomorphization::ReturnLength { span, name, in_len: n, ret_ty, out_len }
+        );
+        require!(
+            in_elem == out_ty,
+            InvalidMonomorphization::ReturnElement { span, name, in_elem, in_ty, ret_ty, out_ty }
+        );
 
         let total_len = u128::from(in_len) * 2;
 
@@ -1431,13 +1424,16 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
     }
 
     if name == sym::simd_insert {
-        require!(in_elem == arg_tys[2], InvalidMonomorphization::InsertedType {
-            span,
-            name,
-            in_elem,
-            in_ty,
-            out_ty: arg_tys[2]
-        });
+        require!(
+            in_elem == arg_tys[2],
+            InvalidMonomorphization::InsertedType {
+                span,
+                name,
+                in_elem,
+                in_ty,
+                out_ty: arg_tys[2]
+            }
+        );
         let idx = bx
             .const_to_opt_u128(args[1].immediate(), false)
             .expect("typeck should have ensure that this is a const");
@@ -1456,13 +1452,10 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
         ));
     }
     if name == sym::simd_extract {
-        require!(ret_ty == in_elem, InvalidMonomorphization::ReturnType {
-            span,
-            name,
-            in_elem,
-            in_ty,
-            ret_ty
-        });
+        require!(
+            ret_ty == in_elem,
+            InvalidMonomorphization::ReturnType { span, name, in_elem, in_ty, ret_ty }
+        );
         let idx = bx
             .const_to_opt_u128(args[1].immediate(), false)
             .expect("typeck should have ensure that this is a const");
@@ -1481,18 +1474,14 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
         let m_elem_ty = in_elem;
         let m_len = in_len;
         let (v_len, _) = require_simd!(arg_tys[1], SimdArgument);
-        require!(m_len == v_len, InvalidMonomorphization::MismatchedLengths {
-            span,
-            name,
-            m_len,
-            v_len
-        });
-        let in_elem_bitwidth =
-            require_int_ty!(m_elem_ty.kind(), InvalidMonomorphization::MaskType {
-                span,
-                name,
-                ty: m_elem_ty
-            });
+        require!(
+            m_len == v_len,
+            InvalidMonomorphization::MismatchedLengths { span, name, m_len, v_len }
+        );
+        let in_elem_bitwidth = require_int_ty!(
+            m_elem_ty.kind(),
+            InvalidMonomorphization::MaskType { span, name, ty: m_elem_ty }
+        );
         let m_i1s = vector_mask_to_bitmask(bx, args[0].immediate(), in_elem_bitwidth, m_len);
         return Ok(bx.select(m_i1s, args[1].immediate(), args[2].immediate()));
     }
@@ -1510,13 +1499,10 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
         let expected_bytes = in_len.div_ceil(8);
 
         // Integer vector <i{in_bitwidth} x in_len>:
-        let in_elem_bitwidth =
-            require_int_or_uint_ty!(in_elem.kind(), InvalidMonomorphization::VectorArgument {
-                span,
-                name,
-                in_ty,
-                in_elem
-            });
+        let in_elem_bitwidth = require_int_or_uint_ty!(
+            in_elem.kind(),
+            InvalidMonomorphization::VectorArgument { span, name, in_ty, in_elem }
+        );
 
         let i1xn = vector_mask_to_bitmask(bx, args[0].immediate(), in_elem_bitwidth, in_len);
         // Bitcast <i1 x N> to iN:
@@ -1698,30 +1684,34 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
         require_simd!(ret_ty, SimdReturn);
 
         // Of the same length:
-        require!(in_len == out_len, InvalidMonomorphization::SecondArgumentLength {
-            span,
-            name,
-            in_len,
-            in_ty,
-            arg_ty: arg_tys[1],
-            out_len
-        });
-        require!(in_len == out_len2, InvalidMonomorphization::ThirdArgumentLength {
-            span,
-            name,
-            in_len,
-            in_ty,
-            arg_ty: arg_tys[2],
-            out_len: out_len2
-        });
+        require!(
+            in_len == out_len,
+            InvalidMonomorphization::SecondArgumentLength {
+                span,
+                name,
+                in_len,
+                in_ty,
+                arg_ty: arg_tys[1],
+                out_len
+            }
+        );
+        require!(
+            in_len == out_len2,
+            InvalidMonomorphization::ThirdArgumentLength {
+                span,
+                name,
+                in_len,
+                in_ty,
+                arg_ty: arg_tys[2],
+                out_len: out_len2
+            }
+        );
 
         // The return type must match the first argument type
-        require!(ret_ty == in_ty, InvalidMonomorphization::ExpectedReturnType {
-            span,
-            name,
-            in_ty,
-            ret_ty
-        });
+        require!(
+            ret_ty == in_ty,
+            InvalidMonomorphization::ExpectedReturnType { span, name, in_ty, ret_ty }
+        );
 
         require!(
             matches!(
@@ -1739,13 +1729,15 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
             }
         );
 
-        let mask_elem_bitwidth =
-            require_int_ty!(element_ty2.kind(), InvalidMonomorphization::ThirdArgElementType {
+        let mask_elem_bitwidth = require_int_ty!(
+            element_ty2.kind(),
+            InvalidMonomorphization::ThirdArgElementType {
                 span,
                 name,
                 expected_element: element_ty2,
                 third_arg: arg_tys[2]
-            });
+            }
+        );
 
         // Alignment of T, must be a constant integer value:
         let alignment_ty = bx.type_i32();
@@ -1805,22 +1797,23 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
         require_simd!(ret_ty, SimdReturn);
 
         // Of the same length:
-        require!(values_len == mask_len, InvalidMonomorphization::ThirdArgumentLength {
-            span,
-            name,
-            in_len: mask_len,
-            in_ty: mask_ty,
-            arg_ty: values_ty,
-            out_len: values_len
-        });
+        require!(
+            values_len == mask_len,
+            InvalidMonomorphization::ThirdArgumentLength {
+                span,
+                name,
+                in_len: mask_len,
+                in_ty: mask_ty,
+                arg_ty: values_ty,
+                out_len: values_len
+            }
+        );
 
         // The return type must match the last argument type
-        require!(ret_ty == values_ty, InvalidMonomorphization::ExpectedReturnType {
-            span,
-            name,
-            in_ty: values_ty,
-            ret_ty
-        });
+        require!(
+            ret_ty == values_ty,
+            InvalidMonomorphization::ExpectedReturnType { span, name, in_ty: values_ty, ret_ty }
+        );
 
         require!(
             matches!(
@@ -1838,13 +1831,15 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
             }
         );
 
-        let m_elem_bitwidth =
-            require_int_ty!(mask_elem.kind(), InvalidMonomorphization::ThirdArgElementType {
+        let m_elem_bitwidth = require_int_ty!(
+            mask_elem.kind(),
+            InvalidMonomorphization::ThirdArgElementType {
                 span,
                 name,
                 expected_element: values_elem,
                 third_arg: mask_ty,
-            });
+            }
+        );
 
         let mask = vector_mask_to_bitmask(bx, args[0].immediate(), m_elem_bitwidth, mask_len);
         let mask_ty = bx.type_vector(bx.type_i1(), mask_len);
@@ -1896,14 +1891,17 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
         let (values_len, values_elem) = require_simd!(values_ty, SimdThird);
 
         // Of the same length:
-        require!(values_len == mask_len, InvalidMonomorphization::ThirdArgumentLength {
-            span,
-            name,
-            in_len: mask_len,
-            in_ty: mask_ty,
-            arg_ty: values_ty,
-            out_len: values_len
-        });
+        require!(
+            values_len == mask_len,
+            InvalidMonomorphization::ThirdArgumentLength {
+                span,
+                name,
+                in_len: mask_len,
+                in_ty: mask_ty,
+                arg_ty: values_ty,
+                out_len: values_len
+            }
+        );
 
         // The second argument must be a mutable pointer type matching the element type
         require!(
@@ -1923,13 +1921,15 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
             }
         );
 
-        let m_elem_bitwidth =
-            require_int_ty!(mask_elem.kind(), InvalidMonomorphization::ThirdArgElementType {
+        let m_elem_bitwidth = require_int_ty!(
+            mask_elem.kind(),
+            InvalidMonomorphization::ThirdArgElementType {
                 span,
                 name,
                 expected_element: values_elem,
                 third_arg: mask_ty,
-            });
+            }
+        );
 
         let mask = vector_mask_to_bitmask(bx, args[0].immediate(), m_elem_bitwidth, mask_len);
         let mask_ty = bx.type_vector(bx.type_i1(), mask_len);
@@ -1976,22 +1976,28 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
         let (element_len2, element_ty2) = require_simd!(arg_tys[2], SimdThird);
 
         // Of the same length:
-        require!(in_len == element_len1, InvalidMonomorphization::SecondArgumentLength {
-            span,
-            name,
-            in_len,
-            in_ty,
-            arg_ty: arg_tys[1],
-            out_len: element_len1
-        });
-        require!(in_len == element_len2, InvalidMonomorphization::ThirdArgumentLength {
-            span,
-            name,
-            in_len,
-            in_ty,
-            arg_ty: arg_tys[2],
-            out_len: element_len2
-        });
+        require!(
+            in_len == element_len1,
+            InvalidMonomorphization::SecondArgumentLength {
+                span,
+                name,
+                in_len,
+                in_ty,
+                arg_ty: arg_tys[1],
+                out_len: element_len1
+            }
+        );
+        require!(
+            in_len == element_len2,
+            InvalidMonomorphization::ThirdArgumentLength {
+                span,
+                name,
+                in_len,
+                in_ty,
+                arg_ty: arg_tys[2],
+                out_len: element_len2
+            }
+        );
 
         require!(
             matches!(
@@ -2011,13 +2017,15 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
         );
 
         // The element type of the third argument must be a signed integer type of any width:
-        let mask_elem_bitwidth =
-            require_int_ty!(element_ty2.kind(), InvalidMonomorphization::ThirdArgElementType {
+        let mask_elem_bitwidth = require_int_ty!(
+            element_ty2.kind(),
+            InvalidMonomorphization::ThirdArgElementType {
                 span,
                 name,
                 expected_element: element_ty2,
                 third_arg: arg_tys[2]
-            });
+            }
+        );
 
         // Alignment of T, must be a constant integer value:
         let alignment_ty = bx.type_i32();
@@ -2058,13 +2066,10 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
         ($name:ident : $integer_reduce:ident, $float_reduce:ident, $ordered:expr, $op:ident,
          $identity:expr) => {
             if name == sym::$name {
-                require!(ret_ty == in_elem, InvalidMonomorphization::ReturnType {
-                    span,
-                    name,
-                    in_elem,
-                    in_ty,
-                    ret_ty
-                });
+                require!(
+                    ret_ty == in_elem,
+                    InvalidMonomorphization::ReturnType { span, name, in_elem, in_ty, ret_ty }
+                );
                 return match in_elem.kind() {
                     ty::Int(_) | ty::Uint(_) => {
                         let r = bx.$integer_reduce(args[0].immediate());
@@ -2133,13 +2138,10 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
     macro_rules! minmax_red {
         ($name:ident: $int_red:ident, $float_red:ident) => {
             if name == sym::$name {
-                require!(ret_ty == in_elem, InvalidMonomorphization::ReturnType {
-                    span,
-                    name,
-                    in_elem,
-                    in_ty,
-                    ret_ty
-                });
+                require!(
+                    ret_ty == in_elem,
+                    InvalidMonomorphization::ReturnType { span, name, in_elem, in_ty, ret_ty }
+                );
                 return match in_elem.kind() {
                     ty::Int(_i) => Ok(bx.$int_red(args[0].immediate(), true)),
                     ty::Uint(_u) => Ok(bx.$int_red(args[0].immediate(), false)),
@@ -2164,13 +2166,10 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
         ($name:ident : $red:ident, $boolean:expr) => {
             if name == sym::$name {
                 let input = if !$boolean {
-                    require!(ret_ty == in_elem, InvalidMonomorphization::ReturnType {
-                        span,
-                        name,
-                        in_elem,
-                        in_ty,
-                        ret_ty
-                    });
+                    require!(
+                        ret_ty == in_elem,
+                        InvalidMonomorphization::ReturnType { span, name, in_elem, in_ty, ret_ty }
+                    );
                     args[0].immediate()
                 } else {
                     let bitwidth = match in_elem.kind() {
@@ -2218,25 +2217,27 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
 
     if name == sym::simd_cast_ptr {
         let (out_len, out_elem) = require_simd!(ret_ty, SimdReturn);
-        require!(in_len == out_len, InvalidMonomorphization::ReturnLengthInputType {
-            span,
-            name,
-            in_len,
-            in_ty,
-            ret_ty,
-            out_len
-        });
+        require!(
+            in_len == out_len,
+            InvalidMonomorphization::ReturnLengthInputType {
+                span,
+                name,
+                in_len,
+                in_ty,
+                ret_ty,
+                out_len
+            }
+        );
 
         match in_elem.kind() {
             ty::RawPtr(p_ty, _) => {
                 let metadata = p_ty.ptr_metadata_ty(bx.tcx, |ty| {
                     bx.tcx.normalize_erasing_regions(bx.typing_env(), ty)
                 });
-                require!(metadata.is_unit(), InvalidMonomorphization::CastWidePointer {
-                    span,
-                    name,
-                    ty: in_elem
-                });
+                require!(
+                    metadata.is_unit(),
+                    InvalidMonomorphization::CastWidePointer { span, name, ty: in_elem }
+                );
             }
             _ => {
                 return_error!(InvalidMonomorphization::ExpectedPointer { span, name, ty: in_elem })
@@ -2247,11 +2248,10 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
                 let metadata = p_ty.ptr_metadata_ty(bx.tcx, |ty| {
                     bx.tcx.normalize_erasing_regions(bx.typing_env(), ty)
                 });
-                require!(metadata.is_unit(), InvalidMonomorphization::CastWidePointer {
-                    span,
-                    name,
-                    ty: out_elem
-                });
+                require!(
+                    metadata.is_unit(),
+                    InvalidMonomorphization::CastWidePointer { span, name, ty: out_elem }
+                );
             }
             _ => {
                 return_error!(InvalidMonomorphization::ExpectedPointer { span, name, ty: out_elem })
@@ -2263,14 +2263,17 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
 
     if name == sym::simd_expose_provenance {
         let (out_len, out_elem) = require_simd!(ret_ty, SimdReturn);
-        require!(in_len == out_len, InvalidMonomorphization::ReturnLengthInputType {
-            span,
-            name,
-            in_len,
-            in_ty,
-            ret_ty,
-            out_len
-        });
+        require!(
+            in_len == out_len,
+            InvalidMonomorphization::ReturnLengthInputType {
+                span,
+                name,
+                in_len,
+                in_ty,
+                ret_ty,
+                out_len
+            }
+        );
 
         match in_elem.kind() {
             ty::RawPtr(_, _) => {}
@@ -2288,14 +2291,17 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
 
     if name == sym::simd_with_exposed_provenance {
         let (out_len, out_elem) = require_simd!(ret_ty, SimdReturn);
-        require!(in_len == out_len, InvalidMonomorphization::ReturnLengthInputType {
-            span,
-            name,
-            in_len,
-            in_ty,
-            ret_ty,
-            out_len
-        });
+        require!(
+            in_len == out_len,
+            InvalidMonomorphization::ReturnLengthInputType {
+                span,
+                name,
+                in_len,
+                in_ty,
+                ret_ty,
+                out_len
+            }
+        );
 
         match in_elem.kind() {
             ty::Uint(ty::UintTy::Usize) => {}
@@ -2313,14 +2319,17 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
 
     if name == sym::simd_cast || name == sym::simd_as {
         let (out_len, out_elem) = require_simd!(ret_ty, SimdReturn);
-        require!(in_len == out_len, InvalidMonomorphization::ReturnLengthInputType {
-            span,
-            name,
-            in_len,
-            in_ty,
-            ret_ty,
-            out_len
-        });
+        require!(
+            in_len == out_len,
+            InvalidMonomorphization::ReturnLengthInputType {
+                span,
+                name,
+                in_len,
+                in_ty,
+                ret_ty,
+                out_len
+            }
+        );
         // casting cares about nominal type, not just structural type
         if in_elem == out_elem {
             return Ok(args[0].immediate());
diff --git a/compiler/rustc_codegen_llvm/src/lib.rs b/compiler/rustc_codegen_llvm/src/lib.rs
index 4a84fd29e44..e9e1b644f18 100644
--- a/compiler/rustc_codegen_llvm/src/lib.rs
+++ b/compiler/rustc_codegen_llvm/src/lib.rs
@@ -13,6 +13,7 @@
 #![feature(extern_types)]
 #![feature(file_buffered)]
 #![feature(hash_raw_entry)]
+#![feature(if_let_guard)]
 #![feature(impl_trait_in_assoc_type)]
 #![feature(iter_intersperse)]
 #![feature(let_chains)]
@@ -29,7 +30,7 @@ use std::mem::ManuallyDrop;
 use back::owned_target_machine::OwnedTargetMachine;
 use back::write::{create_informational_target_machine, create_target_machine};
 use errors::{AutoDiffWithoutLTO, ParseTargetMachineConfig};
-pub use llvm_util::target_features_cfg;
+pub(crate) use llvm_util::target_features_cfg;
 use rustc_ast::expand::allocator::AllocatorKind;
 use rustc_ast::expand::autodiff_attrs::AutoDiffItem;
 use rustc_codegen_ssa::back::lto::{LtoModuleCodegen, SerializedModule, ThinModule};
@@ -71,14 +72,9 @@ mod debuginfo;
 mod declare;
 mod errors;
 mod intrinsic;
-
-// The following is a workaround that replaces `pub mod llvm;` and that fixes issue 53912.
-#[path = "llvm/mod.rs"]
-mod llvm_;
-pub mod llvm {
-    pub use super::llvm_::*;
-}
-
+// FIXME(Zalathar): Fix all the unreachable-pub warnings that would occur if
+// this isn't pub, then make it not pub.
+pub mod llvm;
 mod llvm_util;
 mod mono_item;
 mod type_;
@@ -249,9 +245,6 @@ impl WriteBackendMethods for LlvmCodegenBackend {
     }
 }
 
-unsafe impl Send for LlvmCodegenBackend {} // Llvm is on a per-thread basis
-unsafe impl Sync for LlvmCodegenBackend {}
-
 impl LlvmCodegenBackend {
     pub fn new() -> Box<dyn CodegenBackend> {
         Box::new(LlvmCodegenBackend(()))
diff --git a/compiler/rustc_codegen_llvm/src/llvm/archive_ro.rs b/compiler/rustc_codegen_llvm/src/llvm/archive_ro.rs
index 4dabde55e98..63b2b15c514 100644
--- a/compiler/rustc_codegen_llvm/src/llvm/archive_ro.rs
+++ b/compiler/rustc_codegen_llvm/src/llvm/archive_ro.rs
@@ -26,7 +26,7 @@ impl ArchiveRO {
     ///
     /// If this archive is used with a mutable method, then an error will be
     /// raised.
-    pub fn open(dst: &Path) -> Result<ArchiveRO, String> {
+    pub(crate) fn open(dst: &Path) -> Result<ArchiveRO, String> {
         unsafe {
             let s = path_to_c_string(dst);
             let ar = super::LLVMRustOpenArchive(s.as_ptr()).ok_or_else(|| {
@@ -36,7 +36,7 @@ impl ArchiveRO {
         }
     }
 
-    pub fn iter(&self) -> Iter<'_> {
+    pub(crate) fn iter(&self) -> Iter<'_> {
         unsafe { Iter { raw: super::LLVMRustArchiveIteratorNew(self.raw) } }
     }
 }
@@ -71,7 +71,7 @@ impl<'a> Drop for Iter<'a> {
 }
 
 impl<'a> Child<'a> {
-    pub fn name(&self) -> Option<&'a str> {
+    pub(crate) fn name(&self) -> Option<&'a str> {
         unsafe {
             let mut name_len = 0;
             let name_ptr = super::LLVMRustArchiveChildName(self.raw, &mut name_len);
diff --git a/compiler/rustc_codegen_llvm/src/llvm/enzyme_ffi.rs b/compiler/rustc_codegen_llvm/src/llvm/enzyme_ffi.rs
index 92b0ce8ffe1..39bac13a968 100644
--- a/compiler/rustc_codegen_llvm/src/llvm/enzyme_ffi.rs
+++ b/compiler/rustc_codegen_llvm/src/llvm/enzyme_ffi.rs
@@ -1,4 +1,5 @@
 #![allow(non_camel_case_types)]
+#![expect(dead_code)]
 
 use libc::{c_char, c_uint};
 
@@ -8,23 +9,23 @@ use crate::llvm::Bool;
 #[link(name = "llvm-wrapper", kind = "static")]
 extern "C" {
     // Enzyme
-    pub fn LLVMRustHasMetadata(I: &Value, KindID: c_uint) -> bool;
-    pub fn LLVMRustEraseInstUntilInclusive(BB: &BasicBlock, I: &Value);
-    pub fn LLVMRustGetLastInstruction<'a>(BB: &BasicBlock) -> Option<&'a Value>;
-    pub fn LLVMRustDIGetInstMetadata(I: &Value) -> Option<&Metadata>;
-    pub fn LLVMRustEraseInstFromParent(V: &Value);
-    pub fn LLVMRustGetTerminator<'a>(B: &BasicBlock) -> &'a Value;
-    pub fn LLVMRustVerifyFunction(V: &Value, action: LLVMRustVerifierFailureAction) -> Bool;
+    pub(crate) fn LLVMRustHasMetadata(I: &Value, KindID: c_uint) -> bool;
+    pub(crate) fn LLVMRustEraseInstUntilInclusive(BB: &BasicBlock, I: &Value);
+    pub(crate) fn LLVMRustGetLastInstruction<'a>(BB: &BasicBlock) -> Option<&'a Value>;
+    pub(crate) fn LLVMRustDIGetInstMetadata(I: &Value) -> Option<&Metadata>;
+    pub(crate) fn LLVMRustEraseInstFromParent(V: &Value);
+    pub(crate) fn LLVMRustGetTerminator<'a>(B: &BasicBlock) -> &'a Value;
+    pub(crate) fn LLVMRustVerifyFunction(V: &Value, action: LLVMRustVerifierFailureAction) -> Bool;
 }
 
 extern "C" {
     // Enzyme
-    pub fn LLVMDumpModule(M: &Module);
-    pub fn LLVMDumpValue(V: &Value);
-    pub fn LLVMGetFunctionCallConv(F: &Value) -> c_uint;
-    pub fn LLVMGetReturnType(T: &Type) -> &Type;
-    pub fn LLVMGetParams(Fnc: &Value, parms: *mut &Value);
-    pub fn LLVMGetNamedFunction(M: &Module, Name: *const c_char) -> Option<&Value>;
+    pub(crate) fn LLVMDumpModule(M: &Module);
+    pub(crate) fn LLVMDumpValue(V: &Value);
+    pub(crate) fn LLVMGetFunctionCallConv(F: &Value) -> c_uint;
+    pub(crate) fn LLVMGetReturnType(T: &Type) -> &Type;
+    pub(crate) fn LLVMGetParams(Fnc: &Value, parms: *mut &Value);
+    pub(crate) fn LLVMGetNamedFunction(M: &Module, Name: *const c_char) -> Option<&Value>;
 }
 
 #[repr(C)]
diff --git a/compiler/rustc_codegen_llvm/src/llvm/ffi.rs b/compiler/rustc_codegen_llvm/src/llvm/ffi.rs
index cc7c5231aca..3b0187b9d37 100644
--- a/compiler/rustc_codegen_llvm/src/llvm/ffi.rs
+++ b/compiler/rustc_codegen_llvm/src/llvm/ffi.rs
@@ -1,3 +1,15 @@
+//! Bindings to the LLVM-C API (`LLVM*`), and to our own `extern "C"` wrapper
+//! functions around the unstable LLVM C++ API (`LLVMRust*`).
+//!
+//! ## Passing pointer/length strings as `*const c_uchar`
+//!
+//! Normally it's a good idea for Rust-side bindings to match the corresponding
+//! C-side function declarations as closely as possible. But when passing `&str`
+//! or `&[u8]` data as a pointer/length pair, it's more convenient to declare
+//! the Rust-side pointer as `*const c_uchar` instead of `*const c_char`.
+//! Both pointer types have the same ABI, and using `*const c_uchar` avoids
+//! the need for an extra cast from `*const u8` on the Rust side.
+
 #![allow(non_camel_case_types)]
 #![allow(non_upper_case_globals)]
 
@@ -5,17 +17,18 @@ use std::fmt::Debug;
 use std::marker::PhantomData;
 use std::ptr;
 
-use libc::{c_char, c_int, c_uint, c_ulonglong, c_void, size_t};
+use bitflags::bitflags;
+use libc::{c_char, c_int, c_uchar, c_uint, c_ulonglong, c_void, size_t};
 use rustc_macros::TryFromU32;
 use rustc_target::spec::SymbolVisibility;
 
 use super::RustString;
 use super::debuginfo::{
     DIArray, DIBasicType, DIBuilder, DICompositeType, DIDerivedType, DIDescriptor, DIEnumerator,
-    DIFile, DIFlags, DIGlobalVariableExpression, DILexicalBlock, DILocation, DINameSpace,
-    DISPFlags, DIScope, DISubprogram, DISubrange, DITemplateTypeParameter, DIType, DIVariable,
-    DebugEmissionKind, DebugNameTableKind,
+    DIFile, DIFlags, DIGlobalVariableExpression, DILocation, DISPFlags, DIScope, DISubprogram,
+    DISubrange, DITemplateTypeParameter, DIType, DIVariable, DebugEmissionKind, DebugNameTableKind,
 };
+use crate::llvm;
 
 /// In the LLVM-C API, boolean values are passed as `typedef int LLVMBool`,
 /// which has a different ABI from Rust or C++ `bool`.
@@ -56,19 +69,6 @@ pub enum LLVMRustResult {
     Failure,
 }
 
-/// Translation of LLVM's MachineTypes enum, defined in llvm\include\llvm\BinaryFormat\COFF.h.
-///
-/// We include only architectures supported on Windows.
-#[derive(Copy, Clone, PartialEq)]
-#[repr(C)]
-pub enum LLVMMachineType {
-    AMD64 = 0x8664,
-    I386 = 0x14c,
-    ARM64 = 0xaa64,
-    ARM64EC = 0xa641,
-    ARM = 0x01c0,
-}
-
 /// Must match the layout of `LLVMRustModuleFlagMergeBehavior`.
 ///
 /// When merging modules (e.g. during LTO), their metadata flags are combined. Conflicts are
@@ -160,7 +160,7 @@ pub enum Visibility {
 }
 
 impl Visibility {
-    pub fn from_generic(visibility: SymbolVisibility) -> Self {
+    pub(crate) fn from_generic(visibility: SymbolVisibility) -> Self {
         match visibility {
             SymbolVisibility::Hidden => Visibility::Hidden,
             SymbolVisibility::Protected => Visibility::Protected,
@@ -255,7 +255,7 @@ pub enum IntPredicate {
 }
 
 impl IntPredicate {
-    pub fn from_generic(intpre: rustc_codegen_ssa::common::IntPredicate) -> Self {
+    pub(crate) fn from_generic(intpre: rustc_codegen_ssa::common::IntPredicate) -> Self {
         use rustc_codegen_ssa::common::IntPredicate as Common;
         match intpre {
             Common::IntEQ => Self::IntEQ,
@@ -295,7 +295,7 @@ pub enum RealPredicate {
 }
 
 impl RealPredicate {
-    pub fn from_generic(realp: rustc_codegen_ssa::common::RealPredicate) -> Self {
+    pub(crate) fn from_generic(realp: rustc_codegen_ssa::common::RealPredicate) -> Self {
         use rustc_codegen_ssa::common::RealPredicate as Common;
         match realp {
             Common::RealPredicateFalse => Self::RealPredicateFalse,
@@ -344,7 +344,7 @@ pub enum TypeKind {
 }
 
 impl TypeKind {
-    pub fn to_generic(self) -> rustc_codegen_ssa::common::TypeKind {
+    pub(crate) fn to_generic(self) -> rustc_codegen_ssa::common::TypeKind {
         use rustc_codegen_ssa::common::TypeKind as Common;
         match self {
             Self::Void => Common::Void,
@@ -388,7 +388,7 @@ pub enum AtomicRmwBinOp {
 }
 
 impl AtomicRmwBinOp {
-    pub fn from_generic(op: rustc_codegen_ssa::common::AtomicRmwBinOp) -> Self {
+    pub(crate) fn from_generic(op: rustc_codegen_ssa::common::AtomicRmwBinOp) -> Self {
         use rustc_codegen_ssa::common::AtomicRmwBinOp as Common;
         match op {
             Common::AtomicXchg => Self::AtomicXchg,
@@ -422,7 +422,7 @@ pub enum AtomicOrdering {
 }
 
 impl AtomicOrdering {
-    pub fn from_generic(ao: rustc_codegen_ssa::common::AtomicOrdering) -> Self {
+    pub(crate) fn from_generic(ao: rustc_codegen_ssa::common::AtomicOrdering) -> Self {
         use rustc_codegen_ssa::common::AtomicOrdering as Common;
         match ao {
             Common::Unordered => Self::Unordered,
@@ -632,16 +632,6 @@ pub enum ThreadLocalMode {
     LocalExec,
 }
 
-/// LLVMRustTailCallKind
-#[derive(Copy, Clone)]
-#[repr(C)]
-pub enum TailCallKind {
-    None,
-    Tail,
-    MustTail,
-    NoTail,
-}
-
 /// LLVMRustChecksumKind
 #[derive(Copy, Clone)]
 #[repr(C)]
@@ -760,7 +750,6 @@ pub struct Builder<'a>(InvariantOpaque<'a>);
 #[repr(C)]
 pub struct PassManager<'a>(InvariantOpaque<'a>);
 unsafe extern "C" {
-    pub type Pass;
     pub type TargetMachine;
     pub type Archive;
 }
@@ -786,15 +775,52 @@ unsafe extern "C" {
 }
 
 pub type DiagnosticHandlerTy = unsafe extern "C" fn(&DiagnosticInfo, *mut c_void);
-pub type InlineAsmDiagHandlerTy = unsafe extern "C" fn(&SMDiagnostic, *const c_void, c_uint);
 
 pub mod debuginfo {
+    use std::ptr;
+
     use bitflags::bitflags;
 
     use super::{InvariantOpaque, Metadata};
+    use crate::llvm::{self, Module};
 
+    /// Opaque target type for references to an LLVM debuginfo builder.
+    ///
+    /// `&'_ DIBuilder<'ll>` corresponds to `LLVMDIBuilderRef`, which is the
+    /// LLVM-C wrapper for `DIBuilder *`.
+    ///
+    /// Debuginfo builders are created and destroyed during codegen, so the
+    /// builder reference typically has a shorter lifetime than the LLVM
+    /// session (`'ll`) that it participates in.
     #[repr(C)]
-    pub struct DIBuilder<'a>(InvariantOpaque<'a>);
+    pub struct DIBuilder<'ll>(InvariantOpaque<'ll>);
+
+    /// Owning pointer to a `DIBuilder<'ll>` that will dispose of the builder
+    /// when dropped. Use `.as_ref()` to get the underlying `&DIBuilder`
+    /// needed for debuginfo FFI calls.
+    pub(crate) struct DIBuilderBox<'ll> {
+        raw: ptr::NonNull<DIBuilder<'ll>>,
+    }
+
+    impl<'ll> DIBuilderBox<'ll> {
+        pub(crate) fn new(llmod: &'ll Module) -> Self {
+            let raw = unsafe { llvm::LLVMCreateDIBuilder(llmod) };
+            let raw = ptr::NonNull::new(raw).unwrap();
+            Self { raw }
+        }
+
+        pub(crate) fn as_ref(&self) -> &DIBuilder<'ll> {
+            // SAFETY: This is an owning pointer, so `&DIBuilder` is valid
+            // for as long as `&self` is.
+            unsafe { self.raw.as_ref() }
+        }
+    }
+
+    impl<'ll> Drop for DIBuilderBox<'ll> {
+        fn drop(&mut self) {
+            unsafe { llvm::LLVMDisposeDIBuilder(self.raw) };
+        }
+    }
 
     pub type DIDescriptor = Metadata;
     pub type DILocation = Metadata;
@@ -802,7 +828,6 @@ pub mod debuginfo {
     pub type DIFile = DIScope;
     pub type DILexicalBlock = DIScope;
     pub type DISubprogram = DIScope;
-    pub type DINameSpace = DIScope;
     pub type DIType = DIDescriptor;
     pub type DIBasicType = DIType;
     pub type DIDerivedType = DIType;
@@ -883,7 +908,7 @@ pub mod debuginfo {
     }
 
     impl DebugEmissionKind {
-        pub fn from_generic(kind: rustc_session::config::DebugInfo) -> Self {
+        pub(crate) fn from_generic(kind: rustc_session::config::DebugInfo) -> Self {
             // We should be setting LLVM's emission kind to `LineTablesOnly` if
             // we are compiling with "limited" debuginfo. However, some of the
             // existing tools relied on slightly more debuginfo being generated than
@@ -914,7 +939,6 @@ pub mod debuginfo {
     }
 }
 
-use bitflags::bitflags;
 // These values **must** match with LLVMRustAllocKindFlags
 bitflags! {
     #[repr(transparent)]
@@ -943,49 +967,55 @@ pub type GetSymbolsErrorCallback = unsafe extern "C" fn(*const c_char) -> *mut c
 
 unsafe extern "C" {
     // Create and destroy contexts.
-    pub fn LLVMContextDispose(C: &'static mut Context);
-    pub fn LLVMGetMDKindIDInContext(C: &Context, Name: *const c_char, SLen: c_uint) -> c_uint;
+    pub(crate) fn LLVMContextDispose(C: &'static mut Context);
+    pub(crate) fn LLVMGetMDKindIDInContext(
+        C: &Context,
+        Name: *const c_char,
+        SLen: c_uint,
+    ) -> c_uint;
 
     // Create modules.
-    pub fn LLVMModuleCreateWithNameInContext(ModuleID: *const c_char, C: &Context) -> &Module;
-    pub fn LLVMGetModuleContext(M: &Module) -> &Context;
-    pub fn LLVMCloneModule(M: &Module) -> &Module;
+    pub(crate) fn LLVMModuleCreateWithNameInContext(
+        ModuleID: *const c_char,
+        C: &Context,
+    ) -> &Module;
+    pub(crate) fn LLVMCloneModule(M: &Module) -> &Module;
 
     /// Data layout. See Module::getDataLayout.
-    pub fn LLVMGetDataLayoutStr(M: &Module) -> *const c_char;
-    pub fn LLVMSetDataLayout(M: &Module, Triple: *const c_char);
+    pub(crate) fn LLVMGetDataLayoutStr(M: &Module) -> *const c_char;
+    pub(crate) fn LLVMSetDataLayout(M: &Module, Triple: *const c_char);
 
     /// See Module::setModuleInlineAsm.
-    pub fn LLVMAppendModuleInlineAsm(M: &Module, Asm: *const c_char, Len: size_t);
+    pub(crate) fn LLVMAppendModuleInlineAsm(M: &Module, Asm: *const c_char, Len: size_t);
 
     // Operations on integer types
-    pub fn LLVMInt1TypeInContext(C: &Context) -> &Type;
-    pub fn LLVMInt8TypeInContext(C: &Context) -> &Type;
-    pub fn LLVMInt16TypeInContext(C: &Context) -> &Type;
-    pub fn LLVMInt32TypeInContext(C: &Context) -> &Type;
-    pub fn LLVMInt64TypeInContext(C: &Context) -> &Type;
-    pub fn LLVMIntTypeInContext(C: &Context, NumBits: c_uint) -> &Type;
+    pub(crate) fn LLVMInt1TypeInContext(C: &Context) -> &Type;
+    pub(crate) fn LLVMInt8TypeInContext(C: &Context) -> &Type;
+    pub(crate) fn LLVMInt16TypeInContext(C: &Context) -> &Type;
+    pub(crate) fn LLVMInt32TypeInContext(C: &Context) -> &Type;
+    pub(crate) fn LLVMInt64TypeInContext(C: &Context) -> &Type;
+    pub(crate) fn LLVMIntTypeInContext(C: &Context, NumBits: c_uint) -> &Type;
 
-    pub fn LLVMGetIntTypeWidth(IntegerTy: &Type) -> c_uint;
+    pub(crate) fn LLVMGetIntTypeWidth(IntegerTy: &Type) -> c_uint;
 
     // Operations on real types
-    pub fn LLVMHalfTypeInContext(C: &Context) -> &Type;
-    pub fn LLVMFloatTypeInContext(C: &Context) -> &Type;
-    pub fn LLVMDoubleTypeInContext(C: &Context) -> &Type;
-    pub fn LLVMFP128TypeInContext(C: &Context) -> &Type;
+    pub(crate) fn LLVMHalfTypeInContext(C: &Context) -> &Type;
+    pub(crate) fn LLVMFloatTypeInContext(C: &Context) -> &Type;
+    pub(crate) fn LLVMDoubleTypeInContext(C: &Context) -> &Type;
+    pub(crate) fn LLVMFP128TypeInContext(C: &Context) -> &Type;
 
     // Operations on function types
-    pub fn LLVMFunctionType<'a>(
+    pub(crate) fn LLVMFunctionType<'a>(
         ReturnType: &'a Type,
         ParamTypes: *const &'a Type,
         ParamCount: c_uint,
         IsVarArg: Bool,
     ) -> &'a Type;
-    pub fn LLVMCountParamTypes(FunctionTy: &Type) -> c_uint;
-    pub fn LLVMGetParamTypes<'a>(FunctionTy: &'a Type, Dest: *mut &'a Type);
+    pub(crate) fn LLVMCountParamTypes(FunctionTy: &Type) -> c_uint;
+    pub(crate) fn LLVMGetParamTypes<'a>(FunctionTy: &'a Type, Dest: *mut &'a Type);
 
     // Operations on struct types
-    pub fn LLVMStructTypeInContext<'a>(
+    pub(crate) fn LLVMStructTypeInContext<'a>(
         C: &'a Context,
         ElementTypes: *const &'a Type,
         ElementCount: c_uint,
@@ -993,111 +1023,123 @@ unsafe extern "C" {
     ) -> &'a Type;
 
     // Operations on array, pointer, and vector types (sequence types)
-    pub fn LLVMPointerTypeInContext(C: &Context, AddressSpace: c_uint) -> &Type;
-    pub fn LLVMVectorType(ElementType: &Type, ElementCount: c_uint) -> &Type;
+    pub(crate) fn LLVMPointerTypeInContext(C: &Context, AddressSpace: c_uint) -> &Type;
+    pub(crate) fn LLVMVectorType(ElementType: &Type, ElementCount: c_uint) -> &Type;
 
-    pub fn LLVMGetElementType(Ty: &Type) -> &Type;
-    pub fn LLVMGetVectorSize(VectorTy: &Type) -> c_uint;
+    pub(crate) fn LLVMGetElementType(Ty: &Type) -> &Type;
+    pub(crate) fn LLVMGetVectorSize(VectorTy: &Type) -> c_uint;
 
     // Operations on other types
-    pub fn LLVMVoidTypeInContext(C: &Context) -> &Type;
-    pub fn LLVMTokenTypeInContext(C: &Context) -> &Type;
-    pub fn LLVMMetadataTypeInContext(C: &Context) -> &Type;
+    pub(crate) fn LLVMVoidTypeInContext(C: &Context) -> &Type;
+    pub(crate) fn LLVMTokenTypeInContext(C: &Context) -> &Type;
+    pub(crate) fn LLVMMetadataTypeInContext(C: &Context) -> &Type;
 
     // Operations on all values
-    pub fn LLVMIsUndef(Val: &Value) -> Bool;
-    pub fn LLVMTypeOf(Val: &Value) -> &Type;
-    pub fn LLVMGetValueName2(Val: &Value, Length: *mut size_t) -> *const c_char;
-    pub fn LLVMSetValueName2(Val: &Value, Name: *const c_char, NameLen: size_t);
-    pub fn LLVMReplaceAllUsesWith<'a>(OldVal: &'a Value, NewVal: &'a Value);
-    pub fn LLVMSetMetadata<'a>(Val: &'a Value, KindID: c_uint, Node: &'a Value);
-    pub fn LLVMGlobalSetMetadata<'a>(Val: &'a Value, KindID: c_uint, Metadata: &'a Metadata);
-    pub fn LLVMValueAsMetadata(Node: &Value) -> &Metadata;
+    pub(crate) fn LLVMIsUndef(Val: &Value) -> Bool;
+    pub(crate) fn LLVMTypeOf(Val: &Value) -> &Type;
+    pub(crate) fn LLVMGetValueName2(Val: &Value, Length: *mut size_t) -> *const c_char;
+    pub(crate) fn LLVMSetValueName2(Val: &Value, Name: *const c_char, NameLen: size_t);
+    pub(crate) fn LLVMReplaceAllUsesWith<'a>(OldVal: &'a Value, NewVal: &'a Value);
+    pub(crate) fn LLVMSetMetadata<'a>(Val: &'a Value, KindID: c_uint, Node: &'a Value);
+    pub(crate) fn LLVMGlobalSetMetadata<'a>(Val: &'a Value, KindID: c_uint, Metadata: &'a Metadata);
+    pub(crate) fn LLVMValueAsMetadata(Node: &Value) -> &Metadata;
 
     // Operations on constants of any type
-    pub fn LLVMConstNull(Ty: &Type) -> &Value;
-    pub fn LLVMGetUndef(Ty: &Type) -> &Value;
-    pub fn LLVMGetPoison(Ty: &Type) -> &Value;
+    pub(crate) fn LLVMConstNull(Ty: &Type) -> &Value;
+    pub(crate) fn LLVMGetUndef(Ty: &Type) -> &Value;
+    pub(crate) fn LLVMGetPoison(Ty: &Type) -> &Value;
 
     // Operations on metadata
-    pub fn LLVMMDStringInContext2(C: &Context, Str: *const c_char, SLen: size_t) -> &Metadata;
-    pub fn LLVMMDNodeInContext2<'a>(
+    pub(crate) fn LLVMMDStringInContext2(
+        C: &Context,
+        Str: *const c_char,
+        SLen: size_t,
+    ) -> &Metadata;
+    pub(crate) fn LLVMMDNodeInContext2<'a>(
         C: &'a Context,
         Vals: *const &'a Metadata,
         Count: size_t,
     ) -> &'a Metadata;
-    pub fn LLVMAddNamedMetadataOperand<'a>(M: &'a Module, Name: *const c_char, Val: &'a Value);
+    pub(crate) fn LLVMAddNamedMetadataOperand<'a>(
+        M: &'a Module,
+        Name: *const c_char,
+        Val: &'a Value,
+    );
 
     // Operations on scalar constants
-    pub fn LLVMConstInt(IntTy: &Type, N: c_ulonglong, SignExtend: Bool) -> &Value;
-    pub fn LLVMConstIntOfArbitraryPrecision(IntTy: &Type, Wn: c_uint, Ws: *const u64) -> &Value;
-    pub fn LLVMConstReal(RealTy: &Type, N: f64) -> &Value;
+    pub(crate) fn LLVMConstInt(IntTy: &Type, N: c_ulonglong, SignExtend: Bool) -> &Value;
+    pub(crate) fn LLVMConstIntOfArbitraryPrecision(
+        IntTy: &Type,
+        Wn: c_uint,
+        Ws: *const u64,
+    ) -> &Value;
+    pub(crate) fn LLVMConstReal(RealTy: &Type, N: f64) -> &Value;
 
     // Operations on composite constants
-    pub fn LLVMConstArray2<'a>(
+    pub(crate) fn LLVMConstArray2<'a>(
         ElementTy: &'a Type,
         ConstantVals: *const &'a Value,
         Length: u64,
     ) -> &'a Value;
-    pub fn LLVMArrayType2(ElementType: &Type, ElementCount: u64) -> &Type;
-    pub fn LLVMConstStringInContext2(
+    pub(crate) fn LLVMArrayType2(ElementType: &Type, ElementCount: u64) -> &Type;
+    pub(crate) fn LLVMConstStringInContext2(
         C: &Context,
         Str: *const c_char,
         Length: size_t,
         DontNullTerminate: Bool,
     ) -> &Value;
-    pub fn LLVMConstStructInContext<'a>(
+    pub(crate) fn LLVMConstStructInContext<'a>(
         C: &'a Context,
         ConstantVals: *const &'a Value,
         Count: c_uint,
         Packed: Bool,
     ) -> &'a Value;
-    pub fn LLVMConstVector(ScalarConstantVals: *const &Value, Size: c_uint) -> &Value;
+    pub(crate) fn LLVMConstVector(ScalarConstantVals: *const &Value, Size: c_uint) -> &Value;
 
     // Constant expressions
-    pub fn LLVMConstInBoundsGEP2<'a>(
+    pub(crate) fn LLVMConstInBoundsGEP2<'a>(
         ty: &'a Type,
         ConstantVal: &'a Value,
         ConstantIndices: *const &'a Value,
         NumIndices: c_uint,
     ) -> &'a Value;
-    pub fn LLVMConstPtrToInt<'a>(ConstantVal: &'a Value, ToType: &'a Type) -> &'a Value;
-    pub fn LLVMConstIntToPtr<'a>(ConstantVal: &'a Value, ToType: &'a Type) -> &'a Value;
-    pub fn LLVMConstBitCast<'a>(ConstantVal: &'a Value, ToType: &'a Type) -> &'a Value;
-    pub fn LLVMConstPointerCast<'a>(ConstantVal: &'a Value, ToType: &'a Type) -> &'a Value;
-    pub fn LLVMGetAggregateElement(ConstantVal: &Value, Idx: c_uint) -> Option<&Value>;
-    pub fn LLVMGetConstOpcode(ConstantVal: &Value) -> Opcode;
-    pub fn LLVMIsAConstantExpr(Val: &Value) -> Option<&Value>;
+    pub(crate) fn LLVMConstPtrToInt<'a>(ConstantVal: &'a Value, ToType: &'a Type) -> &'a Value;
+    pub(crate) fn LLVMConstIntToPtr<'a>(ConstantVal: &'a Value, ToType: &'a Type) -> &'a Value;
+    pub(crate) fn LLVMConstBitCast<'a>(ConstantVal: &'a Value, ToType: &'a Type) -> &'a Value;
+    pub(crate) fn LLVMConstPointerCast<'a>(ConstantVal: &'a Value, ToType: &'a Type) -> &'a Value;
+    pub(crate) fn LLVMGetAggregateElement(ConstantVal: &Value, Idx: c_uint) -> Option<&Value>;
+    pub(crate) fn LLVMGetConstOpcode(ConstantVal: &Value) -> Opcode;
+    pub(crate) fn LLVMIsAConstantExpr(Val: &Value) -> Option<&Value>;
 
     // Operations on global variables, functions, and aliases (globals)
-    pub fn LLVMIsDeclaration(Global: &Value) -> Bool;
-    pub fn LLVMGetLinkage(Global: &Value) -> RawEnum<Linkage>;
-    pub fn LLVMSetLinkage(Global: &Value, RustLinkage: Linkage);
-    pub fn LLVMSetSection(Global: &Value, Section: *const c_char);
-    pub fn LLVMGetVisibility(Global: &Value) -> RawEnum<Visibility>;
-    pub fn LLVMSetVisibility(Global: &Value, Viz: Visibility);
-    pub fn LLVMGetAlignment(Global: &Value) -> c_uint;
-    pub fn LLVMSetAlignment(Global: &Value, Bytes: c_uint);
-    pub fn LLVMSetDLLStorageClass(V: &Value, C: DLLStorageClass);
-    pub fn LLVMGlobalGetValueType(Global: &Value) -> &Type;
+    pub(crate) fn LLVMIsDeclaration(Global: &Value) -> Bool;
+    pub(crate) fn LLVMGetLinkage(Global: &Value) -> RawEnum<Linkage>;
+    pub(crate) fn LLVMSetLinkage(Global: &Value, RustLinkage: Linkage);
+    pub(crate) fn LLVMSetSection(Global: &Value, Section: *const c_char);
+    pub(crate) fn LLVMGetVisibility(Global: &Value) -> RawEnum<Visibility>;
+    pub(crate) fn LLVMSetVisibility(Global: &Value, Viz: Visibility);
+    pub(crate) fn LLVMGetAlignment(Global: &Value) -> c_uint;
+    pub(crate) fn LLVMSetAlignment(Global: &Value, Bytes: c_uint);
+    pub(crate) fn LLVMSetDLLStorageClass(V: &Value, C: DLLStorageClass);
+    pub(crate) fn LLVMGlobalGetValueType(Global: &Value) -> &Type;
 
     // Operations on global variables
-    pub fn LLVMIsAGlobalVariable(GlobalVar: &Value) -> Option<&Value>;
-    pub fn LLVMAddGlobal<'a>(M: &'a Module, Ty: &'a Type, Name: *const c_char) -> &'a Value;
-    pub fn LLVMGetNamedGlobal(M: &Module, Name: *const c_char) -> Option<&Value>;
-    pub fn LLVMGetFirstGlobal(M: &Module) -> Option<&Value>;
-    pub fn LLVMGetNextGlobal(GlobalVar: &Value) -> Option<&Value>;
-    pub fn LLVMDeleteGlobal(GlobalVar: &Value);
-    pub fn LLVMGetInitializer(GlobalVar: &Value) -> Option<&Value>;
-    pub fn LLVMSetInitializer<'a>(GlobalVar: &'a Value, ConstantVal: &'a Value);
-    pub fn LLVMIsThreadLocal(GlobalVar: &Value) -> Bool;
-    pub fn LLVMSetThreadLocalMode(GlobalVar: &Value, Mode: ThreadLocalMode);
-    pub fn LLVMIsGlobalConstant(GlobalVar: &Value) -> Bool;
-    pub fn LLVMSetGlobalConstant(GlobalVar: &Value, IsConstant: Bool);
-    pub fn LLVMSetTailCall(CallInst: &Value, IsTailCall: Bool);
+    pub(crate) fn LLVMIsAGlobalVariable(GlobalVar: &Value) -> Option<&Value>;
+    pub(crate) fn LLVMAddGlobal<'a>(M: &'a Module, Ty: &'a Type, Name: *const c_char) -> &'a Value;
+    pub(crate) fn LLVMGetNamedGlobal(M: &Module, Name: *const c_char) -> Option<&Value>;
+    pub(crate) fn LLVMGetFirstGlobal(M: &Module) -> Option<&Value>;
+    pub(crate) fn LLVMGetNextGlobal(GlobalVar: &Value) -> Option<&Value>;
+    pub(crate) fn LLVMDeleteGlobal(GlobalVar: &Value);
+    pub(crate) fn LLVMGetInitializer(GlobalVar: &Value) -> Option<&Value>;
+    pub(crate) fn LLVMSetInitializer<'a>(GlobalVar: &'a Value, ConstantVal: &'a Value);
+    pub(crate) fn LLVMIsThreadLocal(GlobalVar: &Value) -> Bool;
+    pub(crate) fn LLVMSetThreadLocalMode(GlobalVar: &Value, Mode: ThreadLocalMode);
+    pub(crate) fn LLVMIsGlobalConstant(GlobalVar: &Value) -> Bool;
+    pub(crate) fn LLVMSetGlobalConstant(GlobalVar: &Value, IsConstant: Bool);
+    pub(crate) fn LLVMSetTailCall(CallInst: &Value, IsTailCall: Bool);
 
     // Operations on attributes
-    pub fn LLVMCreateStringAttribute(
+    pub(crate) fn LLVMCreateStringAttribute(
         C: &Context,
         Name: *const c_char,
         NameLen: c_uint,
@@ -1106,34 +1148,34 @@ unsafe extern "C" {
     ) -> &Attribute;
 
     // Operations on functions
-    pub fn LLVMSetFunctionCallConv(Fn: &Value, CC: c_uint);
+    pub(crate) fn LLVMSetFunctionCallConv(Fn: &Value, CC: c_uint);
 
     // Operations on parameters
-    pub fn LLVMIsAArgument(Val: &Value) -> Option<&Value>;
-    pub fn LLVMCountParams(Fn: &Value) -> c_uint;
-    pub fn LLVMGetParam(Fn: &Value, Index: c_uint) -> &Value;
+    pub(crate) fn LLVMIsAArgument(Val: &Value) -> Option<&Value>;
+    pub(crate) fn LLVMCountParams(Fn: &Value) -> c_uint;
+    pub(crate) fn LLVMGetParam(Fn: &Value, Index: c_uint) -> &Value;
 
     // Operations on basic blocks
-    pub fn LLVMGetBasicBlockParent(BB: &BasicBlock) -> &Value;
-    pub fn LLVMAppendBasicBlockInContext<'a>(
+    pub(crate) fn LLVMGetBasicBlockParent(BB: &BasicBlock) -> &Value;
+    pub(crate) fn LLVMAppendBasicBlockInContext<'a>(
         C: &'a Context,
         Fn: &'a Value,
         Name: *const c_char,
     ) -> &'a BasicBlock;
 
     // Operations on instructions
-    pub fn LLVMIsAInstruction(Val: &Value) -> Option<&Value>;
-    pub fn LLVMGetFirstBasicBlock(Fn: &Value) -> &BasicBlock;
-    pub fn LLVMGetOperand(Val: &Value, Index: c_uint) -> Option<&Value>;
+    pub(crate) fn LLVMIsAInstruction(Val: &Value) -> Option<&Value>;
+    pub(crate) fn LLVMGetFirstBasicBlock(Fn: &Value) -> &BasicBlock;
+    pub(crate) fn LLVMGetOperand(Val: &Value, Index: c_uint) -> Option<&Value>;
 
     // Operations on call sites
-    pub fn LLVMSetInstructionCallConv(Instr: &Value, CC: c_uint);
+    pub(crate) fn LLVMSetInstructionCallConv(Instr: &Value, CC: c_uint);
 
     // Operations on load/store instructions (only)
-    pub fn LLVMSetVolatile(MemoryAccessInst: &Value, volatile: Bool);
+    pub(crate) fn LLVMSetVolatile(MemoryAccessInst: &Value, volatile: Bool);
 
     // Operations on phi nodes
-    pub fn LLVMAddIncoming<'a>(
+    pub(crate) fn LLVMAddIncoming<'a>(
         PhiNode: &'a Value,
         IncomingValues: *const &'a Value,
         IncomingBlocks: *const &'a BasicBlock,
@@ -1141,263 +1183,278 @@ unsafe extern "C" {
     );
 
     // Instruction builders
-    pub fn LLVMCreateBuilderInContext(C: &Context) -> &mut Builder<'_>;
-    pub fn LLVMPositionBuilderAtEnd<'a>(Builder: &Builder<'a>, Block: &'a BasicBlock);
-    pub fn LLVMGetInsertBlock<'a>(Builder: &Builder<'a>) -> &'a BasicBlock;
-    pub fn LLVMDisposeBuilder<'a>(Builder: &'a mut Builder<'a>);
+    pub(crate) fn LLVMCreateBuilderInContext(C: &Context) -> &mut Builder<'_>;
+    pub(crate) fn LLVMPositionBuilderAtEnd<'a>(Builder: &Builder<'a>, Block: &'a BasicBlock);
+    pub(crate) fn LLVMGetInsertBlock<'a>(Builder: &Builder<'a>) -> &'a BasicBlock;
+    pub(crate) fn LLVMDisposeBuilder<'a>(Builder: &'a mut Builder<'a>);
 
     // Metadata
-    pub fn LLVMSetCurrentDebugLocation2<'a>(Builder: &Builder<'a>, Loc: *const Metadata);
-    pub fn LLVMGetCurrentDebugLocation2<'a>(Builder: &Builder<'a>) -> Option<&'a Metadata>;
+    pub(crate) fn LLVMSetCurrentDebugLocation2<'a>(Builder: &Builder<'a>, Loc: *const Metadata);
+    pub(crate) fn LLVMGetCurrentDebugLocation2<'a>(Builder: &Builder<'a>) -> Option<&'a Metadata>;
 
     // Terminators
-    pub fn LLVMBuildRetVoid<'a>(B: &Builder<'a>) -> &'a Value;
-    pub fn LLVMBuildRet<'a>(B: &Builder<'a>, V: &'a Value) -> &'a Value;
-    pub fn LLVMBuildBr<'a>(B: &Builder<'a>, Dest: &'a BasicBlock) -> &'a Value;
-    pub fn LLVMBuildCondBr<'a>(
+    pub(crate) fn LLVMBuildRetVoid<'a>(B: &Builder<'a>) -> &'a Value;
+    pub(crate) fn LLVMBuildRet<'a>(B: &Builder<'a>, V: &'a Value) -> &'a Value;
+    pub(crate) fn LLVMBuildBr<'a>(B: &Builder<'a>, Dest: &'a BasicBlock) -> &'a Value;
+    pub(crate) fn LLVMBuildCondBr<'a>(
         B: &Builder<'a>,
         If: &'a Value,
         Then: &'a BasicBlock,
         Else: &'a BasicBlock,
     ) -> &'a Value;
-    pub fn LLVMBuildSwitch<'a>(
+    pub(crate) fn LLVMBuildSwitch<'a>(
         B: &Builder<'a>,
         V: &'a Value,
         Else: &'a BasicBlock,
         NumCases: c_uint,
     ) -> &'a Value;
-    pub fn LLVMBuildLandingPad<'a>(
+    pub(crate) fn LLVMBuildLandingPad<'a>(
         B: &Builder<'a>,
         Ty: &'a Type,
         PersFn: Option<&'a Value>,
         NumClauses: c_uint,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildResume<'a>(B: &Builder<'a>, Exn: &'a Value) -> &'a Value;
-    pub fn LLVMBuildUnreachable<'a>(B: &Builder<'a>) -> &'a Value;
+    pub(crate) fn LLVMBuildResume<'a>(B: &Builder<'a>, Exn: &'a Value) -> &'a Value;
+    pub(crate) fn LLVMBuildUnreachable<'a>(B: &Builder<'a>) -> &'a Value;
 
-    pub fn LLVMBuildCleanupPad<'a>(
+    pub(crate) fn LLVMBuildCleanupPad<'a>(
         B: &Builder<'a>,
         ParentPad: Option<&'a Value>,
         Args: *const &'a Value,
         NumArgs: c_uint,
         Name: *const c_char,
     ) -> Option<&'a Value>;
-    pub fn LLVMBuildCleanupRet<'a>(
+    pub(crate) fn LLVMBuildCleanupRet<'a>(
         B: &Builder<'a>,
         CleanupPad: &'a Value,
         BB: Option<&'a BasicBlock>,
     ) -> Option<&'a Value>;
-    pub fn LLVMBuildCatchPad<'a>(
+    pub(crate) fn LLVMBuildCatchPad<'a>(
         B: &Builder<'a>,
         ParentPad: &'a Value,
         Args: *const &'a Value,
         NumArgs: c_uint,
         Name: *const c_char,
     ) -> Option<&'a Value>;
-    pub fn LLVMBuildCatchRet<'a>(
+    pub(crate) fn LLVMBuildCatchRet<'a>(
         B: &Builder<'a>,
         CatchPad: &'a Value,
         BB: &'a BasicBlock,
     ) -> Option<&'a Value>;
-    pub fn LLVMBuildCatchSwitch<'a>(
+    pub(crate) fn LLVMBuildCatchSwitch<'a>(
         Builder: &Builder<'a>,
         ParentPad: Option<&'a Value>,
         UnwindBB: Option<&'a BasicBlock>,
         NumHandlers: c_uint,
         Name: *const c_char,
     ) -> Option<&'a Value>;
-    pub fn LLVMAddHandler<'a>(CatchSwitch: &'a Value, Dest: &'a BasicBlock);
-    pub fn LLVMSetPersonalityFn<'a>(Func: &'a Value, Pers: &'a Value);
+    pub(crate) fn LLVMAddHandler<'a>(CatchSwitch: &'a Value, Dest: &'a BasicBlock);
+    pub(crate) fn LLVMSetPersonalityFn<'a>(Func: &'a Value, Pers: &'a Value);
 
     // Add a case to the switch instruction
-    pub fn LLVMAddCase<'a>(Switch: &'a Value, OnVal: &'a Value, Dest: &'a BasicBlock);
+    pub(crate) fn LLVMAddCase<'a>(Switch: &'a Value, OnVal: &'a Value, Dest: &'a BasicBlock);
 
     // Add a clause to the landing pad instruction
-    pub fn LLVMAddClause<'a>(LandingPad: &'a Value, ClauseVal: &'a Value);
+    pub(crate) fn LLVMAddClause<'a>(LandingPad: &'a Value, ClauseVal: &'a Value);
 
     // Set the cleanup on a landing pad instruction
-    pub fn LLVMSetCleanup(LandingPad: &Value, Val: Bool);
+    pub(crate) fn LLVMSetCleanup(LandingPad: &Value, Val: Bool);
 
     // Arithmetic
-    pub fn LLVMBuildAdd<'a>(
+    pub(crate) fn LLVMBuildAdd<'a>(
         B: &Builder<'a>,
         LHS: &'a Value,
         RHS: &'a Value,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildFAdd<'a>(
+    pub(crate) fn LLVMBuildFAdd<'a>(
         B: &Builder<'a>,
         LHS: &'a Value,
         RHS: &'a Value,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildSub<'a>(
+    pub(crate) fn LLVMBuildSub<'a>(
         B: &Builder<'a>,
         LHS: &'a Value,
         RHS: &'a Value,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildFSub<'a>(
+    pub(crate) fn LLVMBuildFSub<'a>(
         B: &Builder<'a>,
         LHS: &'a Value,
         RHS: &'a Value,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildMul<'a>(
+    pub(crate) fn LLVMBuildMul<'a>(
         B: &Builder<'a>,
         LHS: &'a Value,
         RHS: &'a Value,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildFMul<'a>(
+    pub(crate) fn LLVMBuildFMul<'a>(
         B: &Builder<'a>,
         LHS: &'a Value,
         RHS: &'a Value,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildUDiv<'a>(
+    pub(crate) fn LLVMBuildUDiv<'a>(
         B: &Builder<'a>,
         LHS: &'a Value,
         RHS: &'a Value,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildExactUDiv<'a>(
+    pub(crate) fn LLVMBuildExactUDiv<'a>(
         B: &Builder<'a>,
         LHS: &'a Value,
         RHS: &'a Value,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildSDiv<'a>(
+    pub(crate) fn LLVMBuildSDiv<'a>(
         B: &Builder<'a>,
         LHS: &'a Value,
         RHS: &'a Value,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildExactSDiv<'a>(
+    pub(crate) fn LLVMBuildExactSDiv<'a>(
         B: &Builder<'a>,
         LHS: &'a Value,
         RHS: &'a Value,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildFDiv<'a>(
+    pub(crate) fn LLVMBuildFDiv<'a>(
         B: &Builder<'a>,
         LHS: &'a Value,
         RHS: &'a Value,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildURem<'a>(
+    pub(crate) fn LLVMBuildURem<'a>(
         B: &Builder<'a>,
         LHS: &'a Value,
         RHS: &'a Value,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildSRem<'a>(
+    pub(crate) fn LLVMBuildSRem<'a>(
         B: &Builder<'a>,
         LHS: &'a Value,
         RHS: &'a Value,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildFRem<'a>(
+    pub(crate) fn LLVMBuildFRem<'a>(
         B: &Builder<'a>,
         LHS: &'a Value,
         RHS: &'a Value,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildShl<'a>(
+    pub(crate) fn LLVMBuildShl<'a>(
         B: &Builder<'a>,
         LHS: &'a Value,
         RHS: &'a Value,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildLShr<'a>(
+    pub(crate) fn LLVMBuildLShr<'a>(
         B: &Builder<'a>,
         LHS: &'a Value,
         RHS: &'a Value,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildAShr<'a>(
+    pub(crate) fn LLVMBuildAShr<'a>(
         B: &Builder<'a>,
         LHS: &'a Value,
         RHS: &'a Value,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildNSWAdd<'a>(
+    pub(crate) fn LLVMBuildNSWAdd<'a>(
         B: &Builder<'a>,
         LHS: &'a Value,
         RHS: &'a Value,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildNUWAdd<'a>(
+    pub(crate) fn LLVMBuildNUWAdd<'a>(
         B: &Builder<'a>,
         LHS: &'a Value,
         RHS: &'a Value,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildNSWSub<'a>(
+    pub(crate) fn LLVMBuildNSWSub<'a>(
         B: &Builder<'a>,
         LHS: &'a Value,
         RHS: &'a Value,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildNUWSub<'a>(
+    pub(crate) fn LLVMBuildNUWSub<'a>(
         B: &Builder<'a>,
         LHS: &'a Value,
         RHS: &'a Value,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildNSWMul<'a>(
+    pub(crate) fn LLVMBuildNSWMul<'a>(
         B: &Builder<'a>,
         LHS: &'a Value,
         RHS: &'a Value,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildNUWMul<'a>(
+    pub(crate) fn LLVMBuildNUWMul<'a>(
         B: &Builder<'a>,
         LHS: &'a Value,
         RHS: &'a Value,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildAnd<'a>(
+    pub(crate) fn LLVMBuildAnd<'a>(
         B: &Builder<'a>,
         LHS: &'a Value,
         RHS: &'a Value,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildOr<'a>(
+    pub(crate) fn LLVMBuildOr<'a>(
         B: &Builder<'a>,
         LHS: &'a Value,
         RHS: &'a Value,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildXor<'a>(
+    pub(crate) fn LLVMBuildXor<'a>(
         B: &Builder<'a>,
         LHS: &'a Value,
         RHS: &'a Value,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildNeg<'a>(B: &Builder<'a>, V: &'a Value, Name: *const c_char) -> &'a Value;
-    pub fn LLVMBuildFNeg<'a>(B: &Builder<'a>, V: &'a Value, Name: *const c_char) -> &'a Value;
-    pub fn LLVMBuildNot<'a>(B: &Builder<'a>, V: &'a Value, Name: *const c_char) -> &'a Value;
+    pub(crate) fn LLVMBuildNeg<'a>(B: &Builder<'a>, V: &'a Value, Name: *const c_char)
+    -> &'a Value;
+    pub(crate) fn LLVMBuildFNeg<'a>(
+        B: &Builder<'a>,
+        V: &'a Value,
+        Name: *const c_char,
+    ) -> &'a Value;
+    pub(crate) fn LLVMBuildNot<'a>(B: &Builder<'a>, V: &'a Value, Name: *const c_char)
+    -> &'a Value;
+
+    // Extra flags on arithmetic
+    pub(crate) fn LLVMSetIsDisjoint(Instr: &Value, IsDisjoint: Bool);
+    pub(crate) fn LLVMSetNUW(ArithInst: &Value, HasNUW: Bool);
+    pub(crate) fn LLVMSetNSW(ArithInst: &Value, HasNSW: Bool);
 
     // Memory
-    pub fn LLVMBuildAlloca<'a>(B: &Builder<'a>, Ty: &'a Type, Name: *const c_char) -> &'a Value;
-    pub fn LLVMBuildArrayAlloca<'a>(
+    pub(crate) fn LLVMBuildAlloca<'a>(
+        B: &Builder<'a>,
+        Ty: &'a Type,
+        Name: *const c_char,
+    ) -> &'a Value;
+    pub(crate) fn LLVMBuildArrayAlloca<'a>(
         B: &Builder<'a>,
         Ty: &'a Type,
         Val: &'a Value,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildLoad2<'a>(
+    pub(crate) fn LLVMBuildLoad2<'a>(
         B: &Builder<'a>,
         Ty: &'a Type,
         PointerVal: &'a Value,
         Name: *const c_char,
     ) -> &'a Value;
 
-    pub fn LLVMBuildStore<'a>(B: &Builder<'a>, Val: &'a Value, Ptr: &'a Value) -> &'a Value;
+    pub(crate) fn LLVMBuildStore<'a>(B: &Builder<'a>, Val: &'a Value, Ptr: &'a Value) -> &'a Value;
 
-    pub fn LLVMBuildGEP2<'a>(
+    pub(crate) fn LLVMBuildGEP2<'a>(
         B: &Builder<'a>,
         Ty: &'a Type,
         Pointer: &'a Value,
@@ -1405,7 +1462,7 @@ unsafe extern "C" {
         NumIndices: c_uint,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildInBoundsGEP2<'a>(
+    pub(crate) fn LLVMBuildInBoundsGEP2<'a>(
         B: &Builder<'a>,
         Ty: &'a Type,
         Pointer: &'a Value,
@@ -1415,85 +1472,85 @@ unsafe extern "C" {
     ) -> &'a Value;
 
     // Casts
-    pub fn LLVMBuildTrunc<'a>(
+    pub(crate) fn LLVMBuildTrunc<'a>(
         B: &Builder<'a>,
         Val: &'a Value,
         DestTy: &'a Type,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildZExt<'a>(
+    pub(crate) fn LLVMBuildZExt<'a>(
         B: &Builder<'a>,
         Val: &'a Value,
         DestTy: &'a Type,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildSExt<'a>(
+    pub(crate) fn LLVMBuildSExt<'a>(
         B: &Builder<'a>,
         Val: &'a Value,
         DestTy: &'a Type,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildFPToUI<'a>(
+    pub(crate) fn LLVMBuildFPToUI<'a>(
         B: &Builder<'a>,
         Val: &'a Value,
         DestTy: &'a Type,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildFPToSI<'a>(
+    pub(crate) fn LLVMBuildFPToSI<'a>(
         B: &Builder<'a>,
         Val: &'a Value,
         DestTy: &'a Type,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildUIToFP<'a>(
+    pub(crate) fn LLVMBuildUIToFP<'a>(
         B: &Builder<'a>,
         Val: &'a Value,
         DestTy: &'a Type,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildSIToFP<'a>(
+    pub(crate) fn LLVMBuildSIToFP<'a>(
         B: &Builder<'a>,
         Val: &'a Value,
         DestTy: &'a Type,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildFPTrunc<'a>(
+    pub(crate) fn LLVMBuildFPTrunc<'a>(
         B: &Builder<'a>,
         Val: &'a Value,
         DestTy: &'a Type,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildFPExt<'a>(
+    pub(crate) fn LLVMBuildFPExt<'a>(
         B: &Builder<'a>,
         Val: &'a Value,
         DestTy: &'a Type,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildPtrToInt<'a>(
+    pub(crate) fn LLVMBuildPtrToInt<'a>(
         B: &Builder<'a>,
         Val: &'a Value,
         DestTy: &'a Type,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildIntToPtr<'a>(
+    pub(crate) fn LLVMBuildIntToPtr<'a>(
         B: &Builder<'a>,
         Val: &'a Value,
         DestTy: &'a Type,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildBitCast<'a>(
+    pub(crate) fn LLVMBuildBitCast<'a>(
         B: &Builder<'a>,
         Val: &'a Value,
         DestTy: &'a Type,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildPointerCast<'a>(
+    pub(crate) fn LLVMBuildPointerCast<'a>(
         B: &Builder<'a>,
         Val: &'a Value,
         DestTy: &'a Type,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildIntCast2<'a>(
+    pub(crate) fn LLVMBuildIntCast2<'a>(
         B: &Builder<'a>,
         Val: &'a Value,
         DestTy: &'a Type,
@@ -1502,14 +1559,14 @@ unsafe extern "C" {
     ) -> &'a Value;
 
     // Comparisons
-    pub fn LLVMBuildICmp<'a>(
+    pub(crate) fn LLVMBuildICmp<'a>(
         B: &Builder<'a>,
         Op: c_uint,
         LHS: &'a Value,
         RHS: &'a Value,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildFCmp<'a>(
+    pub(crate) fn LLVMBuildFCmp<'a>(
         B: &Builder<'a>,
         Op: c_uint,
         LHS: &'a Value,
@@ -1518,47 +1575,48 @@ unsafe extern "C" {
     ) -> &'a Value;
 
     // Miscellaneous instructions
-    pub fn LLVMBuildPhi<'a>(B: &Builder<'a>, Ty: &'a Type, Name: *const c_char) -> &'a Value;
-    pub fn LLVMBuildSelect<'a>(
+    pub(crate) fn LLVMBuildPhi<'a>(B: &Builder<'a>, Ty: &'a Type, Name: *const c_char)
+    -> &'a Value;
+    pub(crate) fn LLVMBuildSelect<'a>(
         B: &Builder<'a>,
         If: &'a Value,
         Then: &'a Value,
         Else: &'a Value,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildVAArg<'a>(
+    pub(crate) fn LLVMBuildVAArg<'a>(
         B: &Builder<'a>,
         list: &'a Value,
         Ty: &'a Type,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildExtractElement<'a>(
+    pub(crate) fn LLVMBuildExtractElement<'a>(
         B: &Builder<'a>,
         VecVal: &'a Value,
         Index: &'a Value,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildInsertElement<'a>(
+    pub(crate) fn LLVMBuildInsertElement<'a>(
         B: &Builder<'a>,
         VecVal: &'a Value,
         EltVal: &'a Value,
         Index: &'a Value,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildShuffleVector<'a>(
+    pub(crate) fn LLVMBuildShuffleVector<'a>(
         B: &Builder<'a>,
         V1: &'a Value,
         V2: &'a Value,
         Mask: &'a Value,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildExtractValue<'a>(
+    pub(crate) fn LLVMBuildExtractValue<'a>(
         B: &Builder<'a>,
         AggVal: &'a Value,
         Index: c_uint,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMBuildInsertValue<'a>(
+    pub(crate) fn LLVMBuildInsertValue<'a>(
         B: &Builder<'a>,
         AggVal: &'a Value,
         EltVal: &'a Value,
@@ -1567,7 +1625,7 @@ unsafe extern "C" {
     ) -> &'a Value;
 
     // Atomic Operations
-    pub fn LLVMBuildAtomicCmpXchg<'a>(
+    pub(crate) fn LLVMBuildAtomicCmpXchg<'a>(
         B: &Builder<'a>,
         LHS: &'a Value,
         CMP: &'a Value,
@@ -1577,9 +1635,9 @@ unsafe extern "C" {
         SingleThreaded: Bool,
     ) -> &'a Value;
 
-    pub fn LLVMSetWeak(CmpXchgInst: &Value, IsWeak: Bool);
+    pub(crate) fn LLVMSetWeak(CmpXchgInst: &Value, IsWeak: Bool);
 
-    pub fn LLVMBuildAtomicRMW<'a>(
+    pub(crate) fn LLVMBuildAtomicRMW<'a>(
         B: &Builder<'a>,
         Op: AtomicRmwBinOp,
         LHS: &'a Value,
@@ -1588,7 +1646,7 @@ unsafe extern "C" {
         SingleThreaded: Bool,
     ) -> &'a Value;
 
-    pub fn LLVMBuildFence<'a>(
+    pub(crate) fn LLVMBuildFence<'a>(
         B: &Builder<'a>,
         Order: AtomicOrdering,
         SingleThreaded: Bool,
@@ -1596,36 +1654,36 @@ unsafe extern "C" {
     ) -> &'a Value;
 
     /// Writes a module to the specified path. Returns 0 on success.
-    pub fn LLVMWriteBitcodeToFile(M: &Module, Path: *const c_char) -> c_int;
+    pub(crate) fn LLVMWriteBitcodeToFile(M: &Module, Path: *const c_char) -> c_int;
 
     /// Creates a legacy pass manager -- only used for final codegen.
-    pub fn LLVMCreatePassManager<'a>() -> &'a mut PassManager<'a>;
+    pub(crate) fn LLVMCreatePassManager<'a>() -> &'a mut PassManager<'a>;
 
-    pub fn LLVMAddAnalysisPasses<'a>(T: &'a TargetMachine, PM: &PassManager<'a>);
+    pub(crate) fn LLVMAddAnalysisPasses<'a>(T: &'a TargetMachine, PM: &PassManager<'a>);
 
-    pub fn LLVMGetHostCPUFeatures() -> *mut c_char;
+    pub(crate) fn LLVMGetHostCPUFeatures() -> *mut c_char;
 
-    pub fn LLVMDisposeMessage(message: *mut c_char);
+    pub(crate) fn LLVMDisposeMessage(message: *mut c_char);
 
-    pub fn LLVMIsMultithreaded() -> Bool;
+    pub(crate) fn LLVMIsMultithreaded() -> Bool;
 
-    pub fn LLVMStructCreateNamed(C: &Context, Name: *const c_char) -> &Type;
+    pub(crate) fn LLVMStructCreateNamed(C: &Context, Name: *const c_char) -> &Type;
 
-    pub fn LLVMStructSetBody<'a>(
+    pub(crate) fn LLVMStructSetBody<'a>(
         StructTy: &'a Type,
         ElementTypes: *const &'a Type,
         ElementCount: c_uint,
         Packed: Bool,
     );
 
-    pub fn LLVMMetadataAsValue<'a>(C: &'a Context, MD: &'a Metadata) -> &'a Value;
+    pub(crate) fn LLVMMetadataAsValue<'a>(C: &'a Context, MD: &'a Metadata) -> &'a Value;
 
-    pub fn LLVMSetUnnamedAddress(Global: &Value, UnnamedAddr: UnnamedAddr);
+    pub(crate) fn LLVMSetUnnamedAddress(Global: &Value, UnnamedAddr: UnnamedAddr);
 
-    pub fn LLVMIsAConstantInt(value_ref: &Value) -> Option<&ConstantInt>;
+    pub(crate) fn LLVMIsAConstantInt(value_ref: &Value) -> Option<&ConstantInt>;
 
-    pub fn LLVMGetOrInsertComdat(M: &Module, Name: *const c_char) -> &Comdat;
-    pub fn LLVMSetComdat(V: &Value, C: &Comdat);
+    pub(crate) fn LLVMGetOrInsertComdat(M: &Module, Name: *const c_char) -> &Comdat;
+    pub(crate) fn LLVMSetComdat(V: &Value, C: &Comdat);
 
     pub(crate) fn LLVMCreateOperandBundle(
         Tag: *const c_char,
@@ -1672,24 +1730,72 @@ unsafe extern "C" {
     ) -> &'a Value;
 }
 
+// FFI bindings for `DIBuilder` functions in the LLVM-C API.
+// Try to keep these in the same order as in `llvm/include/llvm-c/DebugInfo.h`.
+//
+// FIXME(#134001): Audit all `Option` parameters, especially in lists, to check
+// that they really are nullable on the C/C++ side. LLVM doesn't appear to
+// actually document which ones are nullable.
+unsafe extern "C" {
+    pub(crate) fn LLVMCreateDIBuilder<'ll>(M: &'ll Module) -> *mut DIBuilder<'ll>;
+    pub(crate) fn LLVMDisposeDIBuilder<'ll>(Builder: ptr::NonNull<DIBuilder<'ll>>);
+
+    pub(crate) fn LLVMDIBuilderFinalize<'ll>(Builder: &DIBuilder<'ll>);
+
+    pub(crate) fn LLVMDIBuilderCreateNameSpace<'ll>(
+        Builder: &DIBuilder<'ll>,
+        ParentScope: Option<&'ll Metadata>,
+        Name: *const c_uchar,
+        NameLen: size_t,
+        ExportSymbols: llvm::Bool,
+    ) -> &'ll Metadata;
+
+    pub(crate) fn LLVMDIBuilderCreateLexicalBlock<'ll>(
+        Builder: &DIBuilder<'ll>,
+        Scope: &'ll Metadata,
+        File: &'ll Metadata,
+        Line: c_uint,
+        Column: c_uint,
+    ) -> &'ll Metadata;
+
+    pub(crate) fn LLVMDIBuilderCreateLexicalBlockFile<'ll>(
+        Builder: &DIBuilder<'ll>,
+        Scope: &'ll Metadata,
+        File: &'ll Metadata,
+        Discriminator: c_uint, // (optional "DWARF path discriminator"; default is 0)
+    ) -> &'ll Metadata;
+
+    pub(crate) fn LLVMDIBuilderCreateDebugLocation<'ll>(
+        Ctx: &'ll Context,
+        Line: c_uint,
+        Column: c_uint,
+        Scope: &'ll Metadata,
+        InlinedAt: Option<&'ll Metadata>,
+    ) -> &'ll Metadata;
+}
+
 #[link(name = "llvm-wrapper", kind = "static")]
 unsafe extern "C" {
-    pub fn LLVMRustInstallErrorHandlers();
-    pub fn LLVMRustDisableSystemDialogsOnCrash();
+    pub(crate) fn LLVMRustInstallErrorHandlers();
+    pub(crate) fn LLVMRustDisableSystemDialogsOnCrash();
 
     // Create and destroy contexts.
-    pub fn LLVMRustContextCreate(shouldDiscardNames: bool) -> &'static mut Context;
+    pub(crate) fn LLVMRustContextCreate(shouldDiscardNames: bool) -> &'static mut Context;
 
     /// See llvm::LLVMTypeKind::getTypeID.
-    pub fn LLVMRustGetTypeKind(Ty: &Type) -> TypeKind;
+    pub(crate) fn LLVMRustGetTypeKind(Ty: &Type) -> TypeKind;
 
     // Operations on all values
-    pub fn LLVMRustGlobalAddMetadata<'a>(Val: &'a Value, KindID: c_uint, Metadata: &'a Metadata);
-    pub fn LLVMRustIsNonGVFunctionPointerTy(Val: &Value) -> bool;
+    pub(crate) fn LLVMRustGlobalAddMetadata<'a>(
+        Val: &'a Value,
+        KindID: c_uint,
+        Metadata: &'a Metadata,
+    );
+    pub(crate) fn LLVMRustIsNonGVFunctionPointerTy(Val: &Value) -> bool;
 
     // Operations on scalar constants
-    pub fn LLVMRustConstIntGetZExtValue(ConstantVal: &ConstantInt, Value: &mut u64) -> bool;
-    pub fn LLVMRustConstInt128Get(
+    pub(crate) fn LLVMRustConstIntGetZExtValue(ConstantVal: &ConstantInt, Value: &mut u64) -> bool;
+    pub(crate) fn LLVMRustConstInt128Get(
         ConstantVal: &ConstantInt,
         SExt: bool,
         high: &mut u64,
@@ -1697,36 +1803,38 @@ unsafe extern "C" {
     ) -> bool;
 
     // Operations on global variables, functions, and aliases (globals)
-    pub fn LLVMRustSetDSOLocal(Global: &Value, is_dso_local: bool);
+    pub(crate) fn LLVMRustSetDSOLocal(Global: &Value, is_dso_local: bool);
 
     // Operations on global variables
-    pub fn LLVMRustGetOrInsertGlobal<'a>(
+    pub(crate) fn LLVMRustGetOrInsertGlobal<'a>(
         M: &'a Module,
         Name: *const c_char,
         NameLen: size_t,
         T: &'a Type,
     ) -> &'a Value;
-    pub fn LLVMRustInsertPrivateGlobal<'a>(M: &'a Module, T: &'a Type) -> &'a Value;
-    pub fn LLVMRustGetNamedValue(
+    pub(crate) fn LLVMRustInsertPrivateGlobal<'a>(M: &'a Module, T: &'a Type) -> &'a Value;
+    pub(crate) fn LLVMRustGetNamedValue(
         M: &Module,
         Name: *const c_char,
         NameLen: size_t,
     ) -> Option<&Value>;
-    pub fn LLVMRustSetTailCallKind(CallInst: &Value, TKC: TailCallKind);
 
     // Operations on attributes
-    pub fn LLVMRustCreateAttrNoValue(C: &Context, attr: AttributeKind) -> &Attribute;
-    pub fn LLVMRustCreateAlignmentAttr(C: &Context, bytes: u64) -> &Attribute;
-    pub fn LLVMRustCreateDereferenceableAttr(C: &Context, bytes: u64) -> &Attribute;
-    pub fn LLVMRustCreateDereferenceableOrNullAttr(C: &Context, bytes: u64) -> &Attribute;
-    pub fn LLVMRustCreateByValAttr<'a>(C: &'a Context, ty: &'a Type) -> &'a Attribute;
-    pub fn LLVMRustCreateStructRetAttr<'a>(C: &'a Context, ty: &'a Type) -> &'a Attribute;
-    pub fn LLVMRustCreateElementTypeAttr<'a>(C: &'a Context, ty: &'a Type) -> &'a Attribute;
-    pub fn LLVMRustCreateUWTableAttr(C: &Context, async_: bool) -> &Attribute;
-    pub fn LLVMRustCreateAllocSizeAttr(C: &Context, size_arg: u32) -> &Attribute;
-    pub fn LLVMRustCreateAllocKindAttr(C: &Context, size_arg: u64) -> &Attribute;
-    pub fn LLVMRustCreateMemoryEffectsAttr(C: &Context, effects: MemoryEffects) -> &Attribute;
-    pub fn LLVMRustCreateRangeAttribute(
+    pub(crate) fn LLVMRustCreateAttrNoValue(C: &Context, attr: AttributeKind) -> &Attribute;
+    pub(crate) fn LLVMRustCreateAlignmentAttr(C: &Context, bytes: u64) -> &Attribute;
+    pub(crate) fn LLVMRustCreateDereferenceableAttr(C: &Context, bytes: u64) -> &Attribute;
+    pub(crate) fn LLVMRustCreateDereferenceableOrNullAttr(C: &Context, bytes: u64) -> &Attribute;
+    pub(crate) fn LLVMRustCreateByValAttr<'a>(C: &'a Context, ty: &'a Type) -> &'a Attribute;
+    pub(crate) fn LLVMRustCreateStructRetAttr<'a>(C: &'a Context, ty: &'a Type) -> &'a Attribute;
+    pub(crate) fn LLVMRustCreateElementTypeAttr<'a>(C: &'a Context, ty: &'a Type) -> &'a Attribute;
+    pub(crate) fn LLVMRustCreateUWTableAttr(C: &Context, async_: bool) -> &Attribute;
+    pub(crate) fn LLVMRustCreateAllocSizeAttr(C: &Context, size_arg: u32) -> &Attribute;
+    pub(crate) fn LLVMRustCreateAllocKindAttr(C: &Context, size_arg: u64) -> &Attribute;
+    pub(crate) fn LLVMRustCreateMemoryEffectsAttr(
+        C: &Context,
+        effects: MemoryEffects,
+    ) -> &Attribute;
+    pub(crate) fn LLVMRustCreateRangeAttribute(
         C: &Context,
         num_bits: c_uint,
         lower_words: *const u64,
@@ -1734,13 +1842,13 @@ unsafe extern "C" {
     ) -> &Attribute;
 
     // Operations on functions
-    pub fn LLVMRustGetOrInsertFunction<'a>(
+    pub(crate) fn LLVMRustGetOrInsertFunction<'a>(
         M: &'a Module,
         Name: *const c_char,
         NameLen: size_t,
         FunctionTy: &'a Type,
     ) -> &'a Value;
-    pub fn LLVMRustAddFunctionAttributes<'a>(
+    pub(crate) fn LLVMRustAddFunctionAttributes<'a>(
         Fn: &'a Value,
         index: c_uint,
         Attrs: *const &'a Attribute,
@@ -1748,19 +1856,19 @@ unsafe extern "C" {
     );
 
     // Operations on call sites
-    pub fn LLVMRustAddCallSiteAttributes<'a>(
+    pub(crate) fn LLVMRustAddCallSiteAttributes<'a>(
         Instr: &'a Value,
         index: c_uint,
         Attrs: *const &'a Attribute,
         AttrsLen: size_t,
     );
 
-    pub fn LLVMRustSetFastMath(Instr: &Value);
-    pub fn LLVMRustSetAlgebraicMath(Instr: &Value);
-    pub fn LLVMRustSetAllowReassoc(Instr: &Value);
+    pub(crate) fn LLVMRustSetFastMath(Instr: &Value);
+    pub(crate) fn LLVMRustSetAlgebraicMath(Instr: &Value);
+    pub(crate) fn LLVMRustSetAllowReassoc(Instr: &Value);
 
     // Miscellaneous instructions
-    pub fn LLVMRustBuildMemCpy<'a>(
+    pub(crate) fn LLVMRustBuildMemCpy<'a>(
         B: &Builder<'a>,
         Dst: &'a Value,
         DstAlign: c_uint,
@@ -1769,7 +1877,7 @@ unsafe extern "C" {
         Size: &'a Value,
         IsVolatile: bool,
     ) -> &'a Value;
-    pub fn LLVMRustBuildMemMove<'a>(
+    pub(crate) fn LLVMRustBuildMemMove<'a>(
         B: &Builder<'a>,
         Dst: &'a Value,
         DstAlign: c_uint,
@@ -1778,7 +1886,7 @@ unsafe extern "C" {
         Size: &'a Value,
         IsVolatile: bool,
     ) -> &'a Value;
-    pub fn LLVMRustBuildMemSet<'a>(
+    pub(crate) fn LLVMRustBuildMemSet<'a>(
         B: &Builder<'a>,
         Dst: &'a Value,
         DstAlign: c_uint,
@@ -1787,47 +1895,55 @@ unsafe extern "C" {
         IsVolatile: bool,
     ) -> &'a Value;
 
-    pub fn LLVMRustBuildVectorReduceFAdd<'a>(
+    pub(crate) fn LLVMRustBuildVectorReduceFAdd<'a>(
         B: &Builder<'a>,
         Acc: &'a Value,
         Src: &'a Value,
     ) -> &'a Value;
-    pub fn LLVMRustBuildVectorReduceFMul<'a>(
+    pub(crate) fn LLVMRustBuildVectorReduceFMul<'a>(
         B: &Builder<'a>,
         Acc: &'a Value,
         Src: &'a Value,
     ) -> &'a Value;
-    pub fn LLVMRustBuildVectorReduceAdd<'a>(B: &Builder<'a>, Src: &'a Value) -> &'a Value;
-    pub fn LLVMRustBuildVectorReduceMul<'a>(B: &Builder<'a>, Src: &'a Value) -> &'a Value;
-    pub fn LLVMRustBuildVectorReduceAnd<'a>(B: &Builder<'a>, Src: &'a Value) -> &'a Value;
-    pub fn LLVMRustBuildVectorReduceOr<'a>(B: &Builder<'a>, Src: &'a Value) -> &'a Value;
-    pub fn LLVMRustBuildVectorReduceXor<'a>(B: &Builder<'a>, Src: &'a Value) -> &'a Value;
-    pub fn LLVMRustBuildVectorReduceMin<'a>(
+    pub(crate) fn LLVMRustBuildVectorReduceAdd<'a>(B: &Builder<'a>, Src: &'a Value) -> &'a Value;
+    pub(crate) fn LLVMRustBuildVectorReduceMul<'a>(B: &Builder<'a>, Src: &'a Value) -> &'a Value;
+    pub(crate) fn LLVMRustBuildVectorReduceAnd<'a>(B: &Builder<'a>, Src: &'a Value) -> &'a Value;
+    pub(crate) fn LLVMRustBuildVectorReduceOr<'a>(B: &Builder<'a>, Src: &'a Value) -> &'a Value;
+    pub(crate) fn LLVMRustBuildVectorReduceXor<'a>(B: &Builder<'a>, Src: &'a Value) -> &'a Value;
+    pub(crate) fn LLVMRustBuildVectorReduceMin<'a>(
         B: &Builder<'a>,
         Src: &'a Value,
         IsSigned: bool,
     ) -> &'a Value;
-    pub fn LLVMRustBuildVectorReduceMax<'a>(
+    pub(crate) fn LLVMRustBuildVectorReduceMax<'a>(
         B: &Builder<'a>,
         Src: &'a Value,
         IsSigned: bool,
     ) -> &'a Value;
-    pub fn LLVMRustBuildVectorReduceFMin<'a>(
+    pub(crate) fn LLVMRustBuildVectorReduceFMin<'a>(
         B: &Builder<'a>,
         Src: &'a Value,
         IsNaN: bool,
     ) -> &'a Value;
-    pub fn LLVMRustBuildVectorReduceFMax<'a>(
+    pub(crate) fn LLVMRustBuildVectorReduceFMax<'a>(
         B: &Builder<'a>,
         Src: &'a Value,
         IsNaN: bool,
     ) -> &'a Value;
 
-    pub fn LLVMRustBuildMinNum<'a>(B: &Builder<'a>, LHS: &'a Value, LHS: &'a Value) -> &'a Value;
-    pub fn LLVMRustBuildMaxNum<'a>(B: &Builder<'a>, LHS: &'a Value, LHS: &'a Value) -> &'a Value;
+    pub(crate) fn LLVMRustBuildMinNum<'a>(
+        B: &Builder<'a>,
+        LHS: &'a Value,
+        LHS: &'a Value,
+    ) -> &'a Value;
+    pub(crate) fn LLVMRustBuildMaxNum<'a>(
+        B: &Builder<'a>,
+        LHS: &'a Value,
+        LHS: &'a Value,
+    ) -> &'a Value;
 
     // Atomic Operations
-    pub fn LLVMRustBuildAtomicLoad<'a>(
+    pub(crate) fn LLVMRustBuildAtomicLoad<'a>(
         B: &Builder<'a>,
         ElementType: &'a Type,
         PointerVal: &'a Value,
@@ -1835,21 +1951,21 @@ unsafe extern "C" {
         Order: AtomicOrdering,
     ) -> &'a Value;
 
-    pub fn LLVMRustBuildAtomicStore<'a>(
+    pub(crate) fn LLVMRustBuildAtomicStore<'a>(
         B: &Builder<'a>,
         Val: &'a Value,
         Ptr: &'a Value,
         Order: AtomicOrdering,
     ) -> &'a Value;
 
-    pub fn LLVMRustTimeTraceProfilerInitialize();
+    pub(crate) fn LLVMRustTimeTraceProfilerInitialize();
 
-    pub fn LLVMRustTimeTraceProfilerFinishThread();
+    pub(crate) fn LLVMRustTimeTraceProfilerFinishThread();
 
-    pub fn LLVMRustTimeTraceProfilerFinish(FileName: *const c_char);
+    pub(crate) fn LLVMRustTimeTraceProfilerFinish(FileName: *const c_char);
 
     /// Returns a string describing the last error caused by an LLVMRust* call.
-    pub fn LLVMRustGetLastError() -> *const c_char;
+    pub(crate) fn LLVMRustGetLastError() -> *const c_char;
 
     /// Prints the timing information collected by `-Ztime-llvm-passes`.
     pub(crate) fn LLVMRustPrintPassTimings(OutStr: &RustString);
@@ -1858,7 +1974,7 @@ unsafe extern "C" {
     pub(crate) fn LLVMRustPrintStatistics(OutStr: &RustString);
 
     /// Prepares inline assembly.
-    pub fn LLVMRustInlineAsm(
+    pub(crate) fn LLVMRustInlineAsm(
         Ty: &Type,
         AsmString: *const c_char,
         AsmStringLen: size_t,
@@ -1869,7 +1985,7 @@ unsafe extern "C" {
         Dialect: AsmDialect,
         CanThrow: Bool,
     ) -> &Value;
-    pub fn LLVMRustInlineAsmVerify(
+    pub(crate) fn LLVMRustInlineAsmVerify(
         Ty: &Type,
         Constraints: *const c_char,
         ConstraintsLen: size_t,
@@ -1913,16 +2029,16 @@ unsafe extern "C" {
     pub(crate) fn LLVMRustCoverageWriteCovmapVarNameToString(OutStr: &RustString);
 
     pub(crate) fn LLVMRustCoverageMappingVersion() -> u32;
-    pub fn LLVMRustDebugMetadataVersion() -> u32;
-    pub fn LLVMRustVersionMajor() -> u32;
-    pub fn LLVMRustVersionMinor() -> u32;
-    pub fn LLVMRustVersionPatch() -> u32;
+    pub(crate) fn LLVMRustDebugMetadataVersion() -> u32;
+    pub(crate) fn LLVMRustVersionMajor() -> u32;
+    pub(crate) fn LLVMRustVersionMinor() -> u32;
+    pub(crate) fn LLVMRustVersionPatch() -> u32;
 
     /// Add LLVM module flags.
     ///
     /// In order for Rust-C LTO to work, module flags must be compatible with Clang. What
     /// "compatible" means depends on the merge behaviors involved.
-    pub fn LLVMRustAddModuleFlagU32(
+    pub(crate) fn LLVMRustAddModuleFlagU32(
         M: &Module,
         MergeBehavior: ModuleFlagMergeBehavior,
         Name: *const c_char,
@@ -1930,7 +2046,7 @@ unsafe extern "C" {
         Value: u32,
     );
 
-    pub fn LLVMRustAddModuleFlagString(
+    pub(crate) fn LLVMRustAddModuleFlagString(
         M: &Module,
         MergeBehavior: ModuleFlagMergeBehavior,
         Name: *const c_char,
@@ -1939,13 +2055,7 @@ unsafe extern "C" {
         ValueLen: size_t,
     );
 
-    pub fn LLVMRustDIBuilderCreate(M: &Module) -> &mut DIBuilder<'_>;
-
-    pub fn LLVMRustDIBuilderDispose<'a>(Builder: &'a mut DIBuilder<'a>);
-
-    pub fn LLVMRustDIBuilderFinalize(Builder: &DIBuilder<'_>);
-
-    pub fn LLVMRustDIBuilderCreateCompileUnit<'a>(
+    pub(crate) fn LLVMRustDIBuilderCreateCompileUnit<'a>(
         Builder: &DIBuilder<'a>,
         Lang: c_uint,
         File: &'a DIFile,
@@ -1962,7 +2072,7 @@ unsafe extern "C" {
         DebugNameTableKind: DebugNameTableKind,
     ) -> &'a DIDescriptor;
 
-    pub fn LLVMRustDIBuilderCreateFile<'a>(
+    pub(crate) fn LLVMRustDIBuilderCreateFile<'a>(
         Builder: &DIBuilder<'a>,
         Filename: *const c_char,
         FilenameLen: size_t,
@@ -1975,12 +2085,12 @@ unsafe extern "C" {
         SourceLen: size_t,
     ) -> &'a DIFile;
 
-    pub fn LLVMRustDIBuilderCreateSubroutineType<'a>(
+    pub(crate) fn LLVMRustDIBuilderCreateSubroutineType<'a>(
         Builder: &DIBuilder<'a>,
         ParameterTypes: &'a DIArray,
     ) -> &'a DICompositeType;
 
-    pub fn LLVMRustDIBuilderCreateFunction<'a>(
+    pub(crate) fn LLVMRustDIBuilderCreateFunction<'a>(
         Builder: &DIBuilder<'a>,
         Scope: &'a DIDescriptor,
         Name: *const c_char,
@@ -1998,7 +2108,7 @@ unsafe extern "C" {
         Decl: Option<&'a DIDescriptor>,
     ) -> &'a DISubprogram;
 
-    pub fn LLVMRustDIBuilderCreateMethod<'a>(
+    pub(crate) fn LLVMRustDIBuilderCreateMethod<'a>(
         Builder: &DIBuilder<'a>,
         Scope: &'a DIDescriptor,
         Name: *const c_char,
@@ -2013,7 +2123,7 @@ unsafe extern "C" {
         TParam: &'a DIArray,
     ) -> &'a DISubprogram;
 
-    pub fn LLVMRustDIBuilderCreateBasicType<'a>(
+    pub(crate) fn LLVMRustDIBuilderCreateBasicType<'a>(
         Builder: &DIBuilder<'a>,
         Name: *const c_char,
         NameLen: size_t,
@@ -2021,7 +2131,7 @@ unsafe extern "C" {
         Encoding: c_uint,
     ) -> &'a DIBasicType;
 
-    pub fn LLVMRustDIBuilderCreateTypedef<'a>(
+    pub(crate) fn LLVMRustDIBuilderCreateTypedef<'a>(
         Builder: &DIBuilder<'a>,
         Type: &'a DIBasicType,
         Name: *const c_char,
@@ -2031,7 +2141,7 @@ unsafe extern "C" {
         Scope: Option<&'a DIScope>,
     ) -> &'a DIDerivedType;
 
-    pub fn LLVMRustDIBuilderCreatePointerType<'a>(
+    pub(crate) fn LLVMRustDIBuilderCreatePointerType<'a>(
         Builder: &DIBuilder<'a>,
         PointeeTy: &'a DIType,
         SizeInBits: u64,
@@ -2041,7 +2151,7 @@ unsafe extern "C" {
         NameLen: size_t,
     ) -> &'a DIDerivedType;
 
-    pub fn LLVMRustDIBuilderCreateStructType<'a>(
+    pub(crate) fn LLVMRustDIBuilderCreateStructType<'a>(
         Builder: &DIBuilder<'a>,
         Scope: Option<&'a DIDescriptor>,
         Name: *const c_char,
@@ -2059,7 +2169,7 @@ unsafe extern "C" {
         UniqueIdLen: size_t,
     ) -> &'a DICompositeType;
 
-    pub fn LLVMRustDIBuilderCreateMemberType<'a>(
+    pub(crate) fn LLVMRustDIBuilderCreateMemberType<'a>(
         Builder: &DIBuilder<'a>,
         Scope: &'a DIDescriptor,
         Name: *const c_char,
@@ -2073,7 +2183,7 @@ unsafe extern "C" {
         Ty: &'a DIType,
     ) -> &'a DIDerivedType;
 
-    pub fn LLVMRustDIBuilderCreateVariantMemberType<'a>(
+    pub(crate) fn LLVMRustDIBuilderCreateVariantMemberType<'a>(
         Builder: &DIBuilder<'a>,
         Scope: &'a DIScope,
         Name: *const c_char,
@@ -2088,7 +2198,7 @@ unsafe extern "C" {
         Ty: &'a DIType,
     ) -> &'a DIType;
 
-    pub fn LLVMRustDIBuilderCreateStaticMemberType<'a>(
+    pub(crate) fn LLVMRustDIBuilderCreateStaticMemberType<'a>(
         Builder: &DIBuilder<'a>,
         Scope: &'a DIDescriptor,
         Name: *const c_char,
@@ -2101,27 +2211,13 @@ unsafe extern "C" {
         AlignInBits: u32,
     ) -> &'a DIDerivedType;
 
-    pub fn LLVMRustDIBuilderCreateQualifiedType<'a>(
+    pub(crate) fn LLVMRustDIBuilderCreateQualifiedType<'a>(
         Builder: &DIBuilder<'a>,
         Tag: c_uint,
         Type: &'a DIType,
     ) -> &'a DIDerivedType;
 
-    pub fn LLVMRustDIBuilderCreateLexicalBlock<'a>(
-        Builder: &DIBuilder<'a>,
-        Scope: &'a DIScope,
-        File: &'a DIFile,
-        Line: c_uint,
-        Col: c_uint,
-    ) -> &'a DILexicalBlock;
-
-    pub fn LLVMRustDIBuilderCreateLexicalBlockFile<'a>(
-        Builder: &DIBuilder<'a>,
-        Scope: &'a DIScope,
-        File: &'a DIFile,
-    ) -> &'a DILexicalBlock;
-
-    pub fn LLVMRustDIBuilderCreateStaticVariable<'a>(
+    pub(crate) fn LLVMRustDIBuilderCreateStaticVariable<'a>(
         Builder: &DIBuilder<'a>,
         Context: Option<&'a DIScope>,
         Name: *const c_char,
@@ -2137,7 +2233,7 @@ unsafe extern "C" {
         AlignInBits: u32,
     ) -> &'a DIGlobalVariableExpression;
 
-    pub fn LLVMRustDIBuilderCreateVariable<'a>(
+    pub(crate) fn LLVMRustDIBuilderCreateVariable<'a>(
         Builder: &DIBuilder<'a>,
         Tag: c_uint,
         Scope: &'a DIDescriptor,
@@ -2152,7 +2248,7 @@ unsafe extern "C" {
         AlignInBits: u32,
     ) -> &'a DIVariable;
 
-    pub fn LLVMRustDIBuilderCreateArrayType<'a>(
+    pub(crate) fn LLVMRustDIBuilderCreateArrayType<'a>(
         Builder: &DIBuilder<'a>,
         Size: u64,
         AlignInBits: u32,
@@ -2160,19 +2256,19 @@ unsafe extern "C" {
         Subscripts: &'a DIArray,
     ) -> &'a DIType;
 
-    pub fn LLVMRustDIBuilderGetOrCreateSubrange<'a>(
+    pub(crate) fn LLVMRustDIBuilderGetOrCreateSubrange<'a>(
         Builder: &DIBuilder<'a>,
         Lo: i64,
         Count: i64,
     ) -> &'a DISubrange;
 
-    pub fn LLVMRustDIBuilderGetOrCreateArray<'a>(
+    pub(crate) fn LLVMRustDIBuilderGetOrCreateArray<'a>(
         Builder: &DIBuilder<'a>,
         Ptr: *const Option<&'a DIDescriptor>,
         Count: c_uint,
     ) -> &'a DIArray;
 
-    pub fn LLVMRustDIBuilderInsertDeclareAtEnd<'a>(
+    pub(crate) fn LLVMRustDIBuilderInsertDeclareAtEnd<'a>(
         Builder: &DIBuilder<'a>,
         Val: &'a Value,
         VarInfo: &'a DIVariable,
@@ -2182,7 +2278,7 @@ unsafe extern "C" {
         InsertAtEnd: &'a BasicBlock,
     );
 
-    pub fn LLVMRustDIBuilderCreateEnumerator<'a>(
+    pub(crate) fn LLVMRustDIBuilderCreateEnumerator<'a>(
         Builder: &DIBuilder<'a>,
         Name: *const c_char,
         NameLen: size_t,
@@ -2191,7 +2287,7 @@ unsafe extern "C" {
         IsUnsigned: bool,
     ) -> &'a DIEnumerator;
 
-    pub fn LLVMRustDIBuilderCreateEnumerationType<'a>(
+    pub(crate) fn LLVMRustDIBuilderCreateEnumerationType<'a>(
         Builder: &DIBuilder<'a>,
         Scope: &'a DIScope,
         Name: *const c_char,
@@ -2205,7 +2301,7 @@ unsafe extern "C" {
         IsScoped: bool,
     ) -> &'a DIType;
 
-    pub fn LLVMRustDIBuilderCreateUnionType<'a>(
+    pub(crate) fn LLVMRustDIBuilderCreateUnionType<'a>(
         Builder: &DIBuilder<'a>,
         Scope: Option<&'a DIScope>,
         Name: *const c_char,
@@ -2221,7 +2317,7 @@ unsafe extern "C" {
         UniqueIdLen: size_t,
     ) -> &'a DIType;
 
-    pub fn LLVMRustDIBuilderCreateVariantPart<'a>(
+    pub(crate) fn LLVMRustDIBuilderCreateVariantPart<'a>(
         Builder: &DIBuilder<'a>,
         Scope: &'a DIScope,
         Name: *const c_char,
@@ -2237,7 +2333,7 @@ unsafe extern "C" {
         UniqueIdLen: size_t,
     ) -> &'a DIDerivedType;
 
-    pub fn LLVMRustDIBuilderCreateTemplateTypeParameter<'a>(
+    pub(crate) fn LLVMRustDIBuilderCreateTemplateTypeParameter<'a>(
         Builder: &DIBuilder<'a>,
         Scope: Option<&'a DIScope>,
         Name: *const c_char,
@@ -2245,51 +2341,37 @@ unsafe extern "C" {
         Ty: &'a DIType,
     ) -> &'a DITemplateTypeParameter;
 
-    pub fn LLVMRustDIBuilderCreateNameSpace<'a>(
-        Builder: &DIBuilder<'a>,
-        Scope: Option<&'a DIScope>,
-        Name: *const c_char,
-        NameLen: size_t,
-        ExportSymbols: bool,
-    ) -> &'a DINameSpace;
-
-    pub fn LLVMRustDICompositeTypeReplaceArrays<'a>(
+    pub(crate) fn LLVMRustDICompositeTypeReplaceArrays<'a>(
         Builder: &DIBuilder<'a>,
         CompositeType: &'a DIType,
         Elements: Option<&'a DIArray>,
         Params: Option<&'a DIArray>,
     );
 
-    pub fn LLVMRustDIBuilderCreateDebugLocation<'a>(
-        Line: c_uint,
-        Column: c_uint,
-        Scope: &'a DIScope,
-        InlinedAt: Option<&'a DILocation>,
-    ) -> &'a DILocation;
-    pub fn LLVMRustDILocationCloneWithBaseDiscriminator<'a>(
+    pub(crate) fn LLVMRustDILocationCloneWithBaseDiscriminator<'a>(
         Location: &'a DILocation,
         BD: c_uint,
     ) -> Option<&'a DILocation>;
 
-    pub fn LLVMRustWriteTypeToString(Type: &Type, s: &RustString);
-    pub fn LLVMRustWriteValueToString(value_ref: &Value, s: &RustString);
+    pub(crate) fn LLVMRustWriteTypeToString(Type: &Type, s: &RustString);
+    pub(crate) fn LLVMRustWriteValueToString(value_ref: &Value, s: &RustString);
 
-    pub fn LLVMRustHasFeature(T: &TargetMachine, s: *const c_char) -> bool;
+    pub(crate) fn LLVMRustHasFeature(T: &TargetMachine, s: *const c_char) -> bool;
 
     pub(crate) fn LLVMRustPrintTargetCPUs(TM: &TargetMachine, OutStr: &RustString);
-    pub fn LLVMRustGetTargetFeaturesCount(T: &TargetMachine) -> size_t;
-    pub fn LLVMRustGetTargetFeature(
+    pub(crate) fn LLVMRustGetTargetFeaturesCount(T: &TargetMachine) -> size_t;
+    pub(crate) fn LLVMRustGetTargetFeature(
         T: &TargetMachine,
         Index: size_t,
         Feature: &mut *const c_char,
         Desc: &mut *const c_char,
     );
 
-    pub fn LLVMRustGetHostCPUName(LenOut: &mut size_t) -> *const u8;
+    pub(crate) fn LLVMRustGetHostCPUName(LenOut: &mut size_t) -> *const u8;
 
     // This function makes copies of pointed to data, so the data's lifetime may end after this
     // function returns.
-    pub fn LLVMRustCreateTargetMachine(
+    pub(crate) fn LLVMRustCreateTargetMachine(
         Triple: *const c_char,
         CPU: *const c_char,
         Features: *const c_char,
@@ -2315,22 +2397,22 @@ unsafe extern "C" {
         ArgsCstrBuffLen: usize,
     ) -> *mut TargetMachine;
 
-    pub fn LLVMRustDisposeTargetMachine(T: *mut TargetMachine);
-    pub fn LLVMRustAddLibraryInfo<'a>(
+    pub(crate) fn LLVMRustDisposeTargetMachine(T: *mut TargetMachine);
+    pub(crate) fn LLVMRustAddLibraryInfo<'a>(
         PM: &PassManager<'a>,
         M: &'a Module,
         DisableSimplifyLibCalls: bool,
     );
-    pub fn LLVMRustWriteOutputFile<'a>(
+    pub(crate) fn LLVMRustWriteOutputFile<'a>(
         T: &'a TargetMachine,
-        PM: &PassManager<'a>,
+        PM: *mut PassManager<'a>,
         M: &'a Module,
         Output: *const c_char,
         DwoOutput: *const c_char,
         FileType: FileType,
         VerifyIR: bool,
     ) -> LLVMRustResult;
-    pub fn LLVMRustOptimize<'a>(
+    pub(crate) fn LLVMRustOptimize<'a>(
         M: &'a Module,
         TM: &'a TargetMachine,
         OptLevel: PassBuilderOptLevel,
@@ -2346,6 +2428,7 @@ unsafe extern "C" {
         LoopVectorize: bool,
         DisableSimplifyLibCalls: bool,
         EmitLifetimeMarkers: bool,
+        RunEnzyme: bool,
         SanitizerOptions: Option<&SanitizerOptions>,
         PGOGenPath: *const c_char,
         PGOUsePath: *const c_char,
@@ -2361,29 +2444,32 @@ unsafe extern "C" {
         LLVMPlugins: *const c_char,
         LLVMPluginsLen: size_t,
     ) -> LLVMRustResult;
-    pub fn LLVMRustPrintModule(
+    pub(crate) fn LLVMRustPrintModule(
         M: &Module,
         Output: *const c_char,
         Demangle: extern "C" fn(*const c_char, size_t, *mut c_char, size_t) -> size_t,
     ) -> LLVMRustResult;
-    pub fn LLVMRustSetLLVMOptions(Argc: c_int, Argv: *const *const c_char);
-    pub fn LLVMRustPrintPasses();
-    pub fn LLVMRustSetNormalizedTarget(M: &Module, triple: *const c_char);
-    pub fn LLVMRustRunRestrictionPass(M: &Module, syms: *const *const c_char, len: size_t);
-
-    pub fn LLVMRustOpenArchive(path: *const c_char) -> Option<&'static mut Archive>;
-    pub fn LLVMRustArchiveIteratorNew(AR: &Archive) -> &mut ArchiveIterator<'_>;
-    pub fn LLVMRustArchiveIteratorNext<'a>(
+    pub(crate) fn LLVMRustSetLLVMOptions(Argc: c_int, Argv: *const *const c_char);
+    pub(crate) fn LLVMRustPrintPasses();
+    pub(crate) fn LLVMRustSetNormalizedTarget(M: &Module, triple: *const c_char);
+    pub(crate) fn LLVMRustRunRestrictionPass(M: &Module, syms: *const *const c_char, len: size_t);
+
+    pub(crate) fn LLVMRustOpenArchive(path: *const c_char) -> Option<&'static mut Archive>;
+    pub(crate) fn LLVMRustArchiveIteratorNew(AR: &Archive) -> &mut ArchiveIterator<'_>;
+    pub(crate) fn LLVMRustArchiveIteratorNext<'a>(
         AIR: &ArchiveIterator<'a>,
     ) -> Option<&'a mut ArchiveChild<'a>>;
-    pub fn LLVMRustArchiveChildName(ACR: &ArchiveChild<'_>, size: &mut size_t) -> *const c_char;
-    pub fn LLVMRustArchiveChildFree<'a>(ACR: &'a mut ArchiveChild<'a>);
-    pub fn LLVMRustArchiveIteratorFree<'a>(AIR: &'a mut ArchiveIterator<'a>);
-    pub fn LLVMRustDestroyArchive(AR: &'static mut Archive);
+    pub(crate) fn LLVMRustArchiveChildName(
+        ACR: &ArchiveChild<'_>,
+        size: &mut size_t,
+    ) -> *const c_char;
+    pub(crate) fn LLVMRustArchiveChildFree<'a>(ACR: &'a mut ArchiveChild<'a>);
+    pub(crate) fn LLVMRustArchiveIteratorFree<'a>(AIR: &'a mut ArchiveIterator<'a>);
+    pub(crate) fn LLVMRustDestroyArchive(AR: &'static mut Archive);
 
-    pub fn LLVMRustWriteTwineToString(T: &Twine, s: &RustString);
+    pub(crate) fn LLVMRustWriteTwineToString(T: &Twine, s: &RustString);
 
-    pub fn LLVMRustUnpackOptimizationDiagnostic<'a>(
+    pub(crate) fn LLVMRustUnpackOptimizationDiagnostic<'a>(
         DI: &'a DiagnosticInfo,
         pass_name_out: &RustString,
         function_out: &mut Option<&'a Value>,
@@ -2393,22 +2479,22 @@ unsafe extern "C" {
         message_out: &RustString,
     );
 
-    pub fn LLVMRustUnpackInlineAsmDiagnostic<'a>(
+    pub(crate) fn LLVMRustUnpackInlineAsmDiagnostic<'a>(
         DI: &'a DiagnosticInfo,
         level_out: &mut DiagnosticLevel,
         cookie_out: &mut u64,
         message_out: &mut Option<&'a Twine>,
     );
 
-    pub fn LLVMRustWriteDiagnosticInfoToString(DI: &DiagnosticInfo, s: &RustString);
-    pub fn LLVMRustGetDiagInfoKind(DI: &DiagnosticInfo) -> DiagnosticKind;
+    pub(crate) fn LLVMRustWriteDiagnosticInfoToString(DI: &DiagnosticInfo, s: &RustString);
+    pub(crate) fn LLVMRustGetDiagInfoKind(DI: &DiagnosticInfo) -> DiagnosticKind;
 
-    pub fn LLVMRustGetSMDiagnostic<'a>(
+    pub(crate) fn LLVMRustGetSMDiagnostic<'a>(
         DI: &'a DiagnosticInfo,
         cookie_out: &mut u64,
     ) -> &'a SMDiagnostic;
 
-    pub fn LLVMRustUnpackSMDiagnostic(
+    pub(crate) fn LLVMRustUnpackSMDiagnostic(
         d: &SMDiagnostic,
         message_out: &RustString,
         buffer_out: &RustString,
@@ -2418,7 +2504,7 @@ unsafe extern "C" {
         num_ranges: &mut usize,
     ) -> bool;
 
-    pub fn LLVMRustWriteArchive(
+    pub(crate) fn LLVMRustWriteArchive(
         Dst: *const c_char,
         NumMembers: size_t,
         Members: *const &RustArchiveMember<'_>,
@@ -2426,63 +2512,63 @@ unsafe extern "C" {
         Kind: ArchiveKind,
         isEC: bool,
     ) -> LLVMRustResult;
-    pub fn LLVMRustArchiveMemberNew<'a>(
+    pub(crate) fn LLVMRustArchiveMemberNew<'a>(
         Filename: *const c_char,
         Name: *const c_char,
         Child: Option<&ArchiveChild<'a>>,
     ) -> &'a mut RustArchiveMember<'a>;
-    pub fn LLVMRustArchiveMemberFree<'a>(Member: &'a mut RustArchiveMember<'a>);
+    pub(crate) fn LLVMRustArchiveMemberFree<'a>(Member: &'a mut RustArchiveMember<'a>);
 
-    pub fn LLVMRustSetDataLayoutFromTargetMachine<'a>(M: &'a Module, TM: &'a TargetMachine);
+    pub(crate) fn LLVMRustSetDataLayoutFromTargetMachine<'a>(M: &'a Module, TM: &'a TargetMachine);
 
-    pub fn LLVMRustPositionBuilderAtStart<'a>(B: &Builder<'a>, BB: &'a BasicBlock);
+    pub(crate) fn LLVMRustPositionBuilderAtStart<'a>(B: &Builder<'a>, BB: &'a BasicBlock);
 
-    pub fn LLVMRustSetModulePICLevel(M: &Module);
-    pub fn LLVMRustSetModulePIELevel(M: &Module);
-    pub fn LLVMRustSetModuleCodeModel(M: &Module, Model: CodeModel);
-    pub fn LLVMRustModuleBufferCreate(M: &Module) -> &'static mut ModuleBuffer;
-    pub fn LLVMRustModuleBufferPtr(p: &ModuleBuffer) -> *const u8;
-    pub fn LLVMRustModuleBufferLen(p: &ModuleBuffer) -> usize;
-    pub fn LLVMRustModuleBufferFree(p: &'static mut ModuleBuffer);
-    pub fn LLVMRustModuleCost(M: &Module) -> u64;
-    pub fn LLVMRustModuleInstructionStats(M: &Module, Str: &RustString);
+    pub(crate) fn LLVMRustSetModulePICLevel(M: &Module);
+    pub(crate) fn LLVMRustSetModulePIELevel(M: &Module);
+    pub(crate) fn LLVMRustSetModuleCodeModel(M: &Module, Model: CodeModel);
+    pub(crate) fn LLVMRustModuleBufferCreate(M: &Module) -> &'static mut ModuleBuffer;
+    pub(crate) fn LLVMRustModuleBufferPtr(p: &ModuleBuffer) -> *const u8;
+    pub(crate) fn LLVMRustModuleBufferLen(p: &ModuleBuffer) -> usize;
+    pub(crate) fn LLVMRustModuleBufferFree(p: &'static mut ModuleBuffer);
+    pub(crate) fn LLVMRustModuleCost(M: &Module) -> u64;
+    pub(crate) fn LLVMRustModuleInstructionStats(M: &Module, Str: &RustString);
 
-    pub fn LLVMRustThinLTOBufferCreate(
+    pub(crate) fn LLVMRustThinLTOBufferCreate(
         M: &Module,
         is_thin: bool,
         emit_summary: bool,
     ) -> &'static mut ThinLTOBuffer;
-    pub fn LLVMRustThinLTOBufferFree(M: &'static mut ThinLTOBuffer);
-    pub fn LLVMRustThinLTOBufferPtr(M: &ThinLTOBuffer) -> *const c_char;
-    pub fn LLVMRustThinLTOBufferLen(M: &ThinLTOBuffer) -> size_t;
-    pub fn LLVMRustThinLTOBufferThinLinkDataPtr(M: &ThinLTOBuffer) -> *const c_char;
-    pub fn LLVMRustThinLTOBufferThinLinkDataLen(M: &ThinLTOBuffer) -> size_t;
-    pub fn LLVMRustCreateThinLTOData(
+    pub(crate) fn LLVMRustThinLTOBufferFree(M: &'static mut ThinLTOBuffer);
+    pub(crate) fn LLVMRustThinLTOBufferPtr(M: &ThinLTOBuffer) -> *const c_char;
+    pub(crate) fn LLVMRustThinLTOBufferLen(M: &ThinLTOBuffer) -> size_t;
+    pub(crate) fn LLVMRustThinLTOBufferThinLinkDataPtr(M: &ThinLTOBuffer) -> *const c_char;
+    pub(crate) fn LLVMRustThinLTOBufferThinLinkDataLen(M: &ThinLTOBuffer) -> size_t;
+    pub(crate) fn LLVMRustCreateThinLTOData(
         Modules: *const ThinLTOModule,
         NumModules: size_t,
         PreservedSymbols: *const *const c_char,
         PreservedSymbolsLen: size_t,
     ) -> Option<&'static mut ThinLTOData>;
-    pub fn LLVMRustPrepareThinLTORename(
+    pub(crate) fn LLVMRustPrepareThinLTORename(
         Data: &ThinLTOData,
         Module: &Module,
         Target: &TargetMachine,
     );
-    pub fn LLVMRustPrepareThinLTOResolveWeak(Data: &ThinLTOData, Module: &Module) -> bool;
-    pub fn LLVMRustPrepareThinLTOInternalize(Data: &ThinLTOData, Module: &Module) -> bool;
-    pub fn LLVMRustPrepareThinLTOImport(
+    pub(crate) fn LLVMRustPrepareThinLTOResolveWeak(Data: &ThinLTOData, Module: &Module) -> bool;
+    pub(crate) fn LLVMRustPrepareThinLTOInternalize(Data: &ThinLTOData, Module: &Module) -> bool;
+    pub(crate) fn LLVMRustPrepareThinLTOImport(
         Data: &ThinLTOData,
         Module: &Module,
         Target: &TargetMachine,
     ) -> bool;
-    pub fn LLVMRustFreeThinLTOData(Data: &'static mut ThinLTOData);
-    pub fn LLVMRustParseBitcodeForLTO(
+    pub(crate) fn LLVMRustFreeThinLTOData(Data: &'static mut ThinLTOData);
+    pub(crate) fn LLVMRustParseBitcodeForLTO(
         Context: &Context,
         Data: *const u8,
         len: usize,
         Identifier: *const c_char,
     ) -> Option<&Module>;
-    pub fn LLVMRustGetSliceFromObjectDataByName(
+    pub(crate) fn LLVMRustGetSliceFromObjectDataByName(
         data: *const u8,
         len: usize,
         name: *const u8,
@@ -2490,25 +2576,27 @@ unsafe extern "C" {
         out_len: &mut usize,
     ) -> *const u8;
 
-    pub fn LLVMRustLinkerNew(M: &Module) -> &mut Linker<'_>;
-    pub fn LLVMRustLinkerAdd(
+    pub(crate) fn LLVMRustLinkerNew(M: &Module) -> &mut Linker<'_>;
+    pub(crate) fn LLVMRustLinkerAdd(
         linker: &Linker<'_>,
         bytecode: *const c_char,
         bytecode_len: usize,
     ) -> bool;
-    pub fn LLVMRustLinkerFree<'a>(linker: &'a mut Linker<'a>);
-    pub fn LLVMRustComputeLTOCacheKey(
+    pub(crate) fn LLVMRustLinkerFree<'a>(linker: &'a mut Linker<'a>);
+    pub(crate) fn LLVMRustComputeLTOCacheKey(
         key_out: &RustString,
         mod_id: *const c_char,
         data: &ThinLTOData,
     );
 
-    pub fn LLVMRustContextGetDiagnosticHandler(Context: &Context) -> Option<&DiagnosticHandler>;
-    pub fn LLVMRustContextSetDiagnosticHandler(
+    pub(crate) fn LLVMRustContextGetDiagnosticHandler(
+        Context: &Context,
+    ) -> Option<&DiagnosticHandler>;
+    pub(crate) fn LLVMRustContextSetDiagnosticHandler(
         context: &Context,
         diagnostic_handler: Option<&DiagnosticHandler>,
     );
-    pub fn LLVMRustContextConfigureDiagnosticHandler(
+    pub(crate) fn LLVMRustContextConfigureDiagnosticHandler(
         context: &Context,
         diagnostic_handler_callback: DiagnosticHandlerTy,
         diagnostic_handler_context: *mut c_void,
@@ -2519,17 +2607,15 @@ unsafe extern "C" {
         pgo_available: bool,
     );
 
-    pub fn LLVMRustGetMangledName(V: &Value, out: &RustString);
-
-    pub fn LLVMRustGetElementTypeArgIndex(CallSite: &Value) -> i32;
+    pub(crate) fn LLVMRustGetMangledName(V: &Value, out: &RustString);
 
-    pub fn LLVMRustIsBitcode(ptr: *const u8, len: usize) -> bool;
+    pub(crate) fn LLVMRustGetElementTypeArgIndex(CallSite: &Value) -> i32;
 
-    pub fn LLVMRustLLVMHasZlibCompressionForDebugSymbols() -> bool;
+    pub(crate) fn LLVMRustLLVMHasZlibCompressionForDebugSymbols() -> bool;
 
-    pub fn LLVMRustLLVMHasZstdCompressionForDebugSymbols() -> bool;
+    pub(crate) fn LLVMRustLLVMHasZstdCompressionForDebugSymbols() -> bool;
 
-    pub fn LLVMRustGetSymbols(
+    pub(crate) fn LLVMRustGetSymbols(
         buf_ptr: *const u8,
         buf_len: usize,
         state: *mut c_void,
@@ -2537,10 +2623,10 @@ unsafe extern "C" {
         error_callback: GetSymbolsErrorCallback,
     ) -> *mut c_void;
 
-    pub fn LLVMRustIs64BitSymbolicFile(buf_ptr: *const u8, buf_len: usize) -> bool;
+    pub(crate) fn LLVMRustIs64BitSymbolicFile(buf_ptr: *const u8, buf_len: usize) -> bool;
 
-    pub fn LLVMRustIsECObject(buf_ptr: *const u8, buf_len: usize) -> bool;
+    pub(crate) fn LLVMRustIsECObject(buf_ptr: *const u8, buf_len: usize) -> bool;
 
-    pub fn LLVMRustSetNoSanitizeAddress(Global: &Value);
-    pub fn LLVMRustSetNoSanitizeHWAddress(Global: &Value);
+    pub(crate) fn LLVMRustSetNoSanitizeAddress(Global: &Value);
+    pub(crate) fn LLVMRustSetNoSanitizeHWAddress(Global: &Value);
 }
diff --git a/compiler/rustc_codegen_llvm/src/llvm/mod.rs b/compiler/rustc_codegen_llvm/src/llvm/mod.rs
index 2592a7df95c..efc9cf2ef69 100644
--- a/compiler/rustc_codegen_llvm/src/llvm/mod.rs
+++ b/compiler/rustc_codegen_llvm/src/llvm/mod.rs
@@ -10,13 +10,9 @@ use libc::c_uint;
 use rustc_abi::{Align, Size, WrappingRange};
 use rustc_llvm::RustString;
 
-pub use self::AtomicRmwBinOp::*;
 pub use self::CallConv::*;
 pub use self::CodeGenOptSize::*;
-pub use self::IntPredicate::*;
-pub use self::Linkage::*;
 pub use self::MetadataType::*;
-pub use self::RealPredicate::*;
 pub use self::ffi::*;
 use crate::common::AsCCharPtr;
 
@@ -28,7 +24,7 @@ mod ffi;
 pub use self::enzyme_ffi::*;
 
 impl LLVMRustResult {
-    pub fn into_result(self) -> Result<(), ()> {
+    pub(crate) fn into_result(self) -> Result<(), ()> {
         match self {
             LLVMRustResult::Success => Ok(()),
             LLVMRustResult::Failure => Err(()),
@@ -36,13 +32,17 @@ impl LLVMRustResult {
     }
 }
 
-pub fn AddFunctionAttributes<'ll>(llfn: &'ll Value, idx: AttributePlace, attrs: &[&'ll Attribute]) {
+pub(crate) fn AddFunctionAttributes<'ll>(
+    llfn: &'ll Value,
+    idx: AttributePlace,
+    attrs: &[&'ll Attribute],
+) {
     unsafe {
         LLVMRustAddFunctionAttributes(llfn, idx.as_uint(), attrs.as_ptr(), attrs.len());
     }
 }
 
-pub fn AddCallSiteAttributes<'ll>(
+pub(crate) fn AddCallSiteAttributes<'ll>(
     callsite: &'ll Value,
     idx: AttributePlace,
     attrs: &[&'ll Attribute],
@@ -52,7 +52,11 @@ pub fn AddCallSiteAttributes<'ll>(
     }
 }
 
-pub fn CreateAttrStringValue<'ll>(llcx: &'ll Context, attr: &str, value: &str) -> &'ll Attribute {
+pub(crate) fn CreateAttrStringValue<'ll>(
+    llcx: &'ll Context,
+    attr: &str,
+    value: &str,
+) -> &'ll Attribute {
     unsafe {
         LLVMCreateStringAttribute(
             llcx,
@@ -64,7 +68,7 @@ pub fn CreateAttrStringValue<'ll>(llcx: &'ll Context, attr: &str, value: &str) -
     }
 }
 
-pub fn CreateAttrString<'ll>(llcx: &'ll Context, attr: &str) -> &'ll Attribute {
+pub(crate) fn CreateAttrString<'ll>(llcx: &'ll Context, attr: &str) -> &'ll Attribute {
     unsafe {
         LLVMCreateStringAttribute(
             llcx,
@@ -76,39 +80,39 @@ pub fn CreateAttrString<'ll>(llcx: &'ll Context, attr: &str) -> &'ll Attribute {
     }
 }
 
-pub fn CreateAlignmentAttr(llcx: &Context, bytes: u64) -> &Attribute {
+pub(crate) fn CreateAlignmentAttr(llcx: &Context, bytes: u64) -> &Attribute {
     unsafe { LLVMRustCreateAlignmentAttr(llcx, bytes) }
 }
 
-pub fn CreateDereferenceableAttr(llcx: &Context, bytes: u64) -> &Attribute {
+pub(crate) fn CreateDereferenceableAttr(llcx: &Context, bytes: u64) -> &Attribute {
     unsafe { LLVMRustCreateDereferenceableAttr(llcx, bytes) }
 }
 
-pub fn CreateDereferenceableOrNullAttr(llcx: &Context, bytes: u64) -> &Attribute {
+pub(crate) fn CreateDereferenceableOrNullAttr(llcx: &Context, bytes: u64) -> &Attribute {
     unsafe { LLVMRustCreateDereferenceableOrNullAttr(llcx, bytes) }
 }
 
-pub fn CreateByValAttr<'ll>(llcx: &'ll Context, ty: &'ll Type) -> &'ll Attribute {
+pub(crate) fn CreateByValAttr<'ll>(llcx: &'ll Context, ty: &'ll Type) -> &'ll Attribute {
     unsafe { LLVMRustCreateByValAttr(llcx, ty) }
 }
 
-pub fn CreateStructRetAttr<'ll>(llcx: &'ll Context, ty: &'ll Type) -> &'ll Attribute {
+pub(crate) fn CreateStructRetAttr<'ll>(llcx: &'ll Context, ty: &'ll Type) -> &'ll Attribute {
     unsafe { LLVMRustCreateStructRetAttr(llcx, ty) }
 }
 
-pub fn CreateUWTableAttr(llcx: &Context, async_: bool) -> &Attribute {
+pub(crate) fn CreateUWTableAttr(llcx: &Context, async_: bool) -> &Attribute {
     unsafe { LLVMRustCreateUWTableAttr(llcx, async_) }
 }
 
-pub fn CreateAllocSizeAttr(llcx: &Context, size_arg: u32) -> &Attribute {
+pub(crate) fn CreateAllocSizeAttr(llcx: &Context, size_arg: u32) -> &Attribute {
     unsafe { LLVMRustCreateAllocSizeAttr(llcx, size_arg) }
 }
 
-pub fn CreateAllocKindAttr(llcx: &Context, kind_arg: AllocKindFlags) -> &Attribute {
+pub(crate) fn CreateAllocKindAttr(llcx: &Context, kind_arg: AllocKindFlags) -> &Attribute {
     unsafe { LLVMRustCreateAllocKindAttr(llcx, kind_arg.bits()) }
 }
 
-pub fn CreateRangeAttr(llcx: &Context, size: Size, range: WrappingRange) -> &Attribute {
+pub(crate) fn CreateRangeAttr(llcx: &Context, size: Size, range: WrappingRange) -> &Attribute {
     let lower = range.start;
     let upper = range.end.wrapping_add(1);
     let lower_words = [lower as u64, (lower >> 64) as u64];
@@ -131,7 +135,7 @@ pub enum AttributePlace {
 }
 
 impl AttributePlace {
-    pub fn as_uint(self) -> c_uint {
+    pub(crate) fn as_uint(self) -> c_uint {
         match self {
             AttributePlace::ReturnValue => 0,
             AttributePlace::Argument(i) => 1 + i,
@@ -163,12 +167,12 @@ impl FromStr for ArchiveKind {
     }
 }
 
-pub fn SetInstructionCallConv(instr: &Value, cc: CallConv) {
+pub(crate) fn SetInstructionCallConv(instr: &Value, cc: CallConv) {
     unsafe {
         LLVMSetInstructionCallConv(instr, cc as c_uint);
     }
 }
-pub fn SetFunctionCallConv(fn_: &Value, cc: CallConv) {
+pub(crate) fn SetFunctionCallConv(fn_: &Value, cc: CallConv) {
     unsafe {
         LLVMSetFunctionCallConv(fn_, cc as c_uint);
     }
@@ -180,20 +184,20 @@ pub fn SetFunctionCallConv(fn_: &Value, cc: CallConv) {
 // value's name as the comdat value to make sure that it is in a 1-to-1 relationship to the
 // function.
 // For more details on COMDAT sections see e.g., https://www.airs.com/blog/archives/52
-pub fn SetUniqueComdat(llmod: &Module, val: &Value) {
+pub(crate) fn SetUniqueComdat(llmod: &Module, val: &Value) {
     let name_buf = get_value_name(val).to_vec();
     let name =
         CString::from_vec_with_nul(name_buf).or_else(|buf| CString::new(buf.into_bytes())).unwrap();
     set_comdat(llmod, val, &name);
 }
 
-pub fn SetUnnamedAddress(global: &Value, unnamed: UnnamedAddr) {
+pub(crate) fn SetUnnamedAddress(global: &Value, unnamed: UnnamedAddr) {
     unsafe {
         LLVMSetUnnamedAddress(global, unnamed);
     }
 }
 
-pub fn set_thread_local_mode(global: &Value, mode: ThreadLocalMode) {
+pub(crate) fn set_thread_local_mode(global: &Value, mode: ThreadLocalMode) {
     unsafe {
         LLVMSetThreadLocalMode(global, mode);
     }
@@ -201,61 +205,65 @@ pub fn set_thread_local_mode(global: &Value, mode: ThreadLocalMode) {
 
 impl AttributeKind {
     /// Create an LLVM Attribute with no associated value.
-    pub fn create_attr(self, llcx: &Context) -> &Attribute {
+    pub(crate) fn create_attr(self, llcx: &Context) -> &Attribute {
         unsafe { LLVMRustCreateAttrNoValue(llcx, self) }
     }
 }
 
 impl MemoryEffects {
     /// Create an LLVM Attribute with these memory effects.
-    pub fn create_attr(self, llcx: &Context) -> &Attribute {
+    pub(crate) fn create_attr(self, llcx: &Context) -> &Attribute {
         unsafe { LLVMRustCreateMemoryEffectsAttr(llcx, self) }
     }
 }
 
-pub fn set_section(llglobal: &Value, section_name: &CStr) {
+pub(crate) fn set_section(llglobal: &Value, section_name: &CStr) {
     unsafe {
         LLVMSetSection(llglobal, section_name.as_ptr());
     }
 }
 
-pub fn add_global<'a>(llmod: &'a Module, ty: &'a Type, name_cstr: &CStr) -> &'a Value {
+pub(crate) fn add_global<'a>(llmod: &'a Module, ty: &'a Type, name_cstr: &CStr) -> &'a Value {
     unsafe { LLVMAddGlobal(llmod, ty, name_cstr.as_ptr()) }
 }
 
-pub fn set_initializer(llglobal: &Value, constant_val: &Value) {
+pub(crate) fn set_initializer(llglobal: &Value, constant_val: &Value) {
     unsafe {
         LLVMSetInitializer(llglobal, constant_val);
     }
 }
 
-pub fn set_global_constant(llglobal: &Value, is_constant: bool) {
+pub(crate) fn set_global_constant(llglobal: &Value, is_constant: bool) {
     unsafe {
         LLVMSetGlobalConstant(llglobal, if is_constant { ffi::True } else { ffi::False });
     }
 }
 
-pub fn get_linkage(llglobal: &Value) -> Linkage {
+pub(crate) fn get_linkage(llglobal: &Value) -> Linkage {
     unsafe { LLVMGetLinkage(llglobal) }.to_rust()
 }
 
-pub fn set_linkage(llglobal: &Value, linkage: Linkage) {
+pub(crate) fn set_linkage(llglobal: &Value, linkage: Linkage) {
     unsafe {
         LLVMSetLinkage(llglobal, linkage);
     }
 }
 
-pub fn get_visibility(llglobal: &Value) -> Visibility {
+pub(crate) fn is_declaration(llglobal: &Value) -> bool {
+    unsafe { LLVMIsDeclaration(llglobal) == ffi::True }
+}
+
+pub(crate) fn get_visibility(llglobal: &Value) -> Visibility {
     unsafe { LLVMGetVisibility(llglobal) }.to_rust()
 }
 
-pub fn set_visibility(llglobal: &Value, visibility: Visibility) {
+pub(crate) fn set_visibility(llglobal: &Value, visibility: Visibility) {
     unsafe {
         LLVMSetVisibility(llglobal, visibility);
     }
 }
 
-pub fn set_alignment(llglobal: &Value, align: Align) {
+pub(crate) fn set_alignment(llglobal: &Value, align: Align) {
     unsafe {
         ffi::LLVMSetAlignment(llglobal, align.bytes() as c_uint);
     }
@@ -265,7 +273,7 @@ pub fn set_alignment(llglobal: &Value, align: Align) {
 ///
 /// Inserts the comdat into `llmod` if it does not exist.
 /// It is an error to call this if the target does not support comdat.
-pub fn set_comdat(llmod: &Module, llglobal: &Value, name: &CStr) {
+pub(crate) fn set_comdat(llmod: &Module, llglobal: &Value, name: &CStr) {
     unsafe {
         let comdat = LLVMGetOrInsertComdat(llmod, name.as_ptr());
         LLVMSetComdat(llglobal, comdat);
@@ -273,7 +281,7 @@ pub fn set_comdat(llmod: &Module, llglobal: &Value, name: &CStr) {
 }
 
 /// Safe wrapper around `LLVMGetParam`, because segfaults are no fun.
-pub fn get_param(llfn: &Value, index: c_uint) -> &Value {
+pub(crate) fn get_param(llfn: &Value, index: c_uint) -> &Value {
     unsafe {
         assert!(
             index < LLVMCountParams(llfn),
@@ -286,7 +294,7 @@ pub fn get_param(llfn: &Value, index: c_uint) -> &Value {
 }
 
 /// Safe wrapper for `LLVMGetValueName2` into a byte slice
-pub fn get_value_name(value: &Value) -> &[u8] {
+pub(crate) fn get_value_name(value: &Value) -> &[u8] {
     unsafe {
         let mut len = 0;
         let data = LLVMGetValueName2(value, &mut len);
@@ -295,28 +303,28 @@ pub fn get_value_name(value: &Value) -> &[u8] {
 }
 
 /// Safe wrapper for `LLVMSetValueName2` from a byte slice
-pub fn set_value_name(value: &Value, name: &[u8]) {
+pub(crate) fn set_value_name(value: &Value, name: &[u8]) {
     unsafe {
         let data = name.as_c_char_ptr();
         LLVMSetValueName2(value, data, name.len());
     }
 }
 
-pub fn build_string(f: impl FnOnce(&RustString)) -> Result<String, FromUtf8Error> {
+pub(crate) fn build_string(f: impl FnOnce(&RustString)) -> Result<String, FromUtf8Error> {
     String::from_utf8(RustString::build_byte_buffer(f))
 }
 
-pub fn build_byte_buffer(f: impl FnOnce(&RustString)) -> Vec<u8> {
+pub(crate) fn build_byte_buffer(f: impl FnOnce(&RustString)) -> Vec<u8> {
     RustString::build_byte_buffer(f)
 }
 
-pub fn twine_to_string(tr: &Twine) -> String {
+pub(crate) fn twine_to_string(tr: &Twine) -> String {
     unsafe {
         build_string(|s| LLVMRustWriteTwineToString(tr, s)).expect("got a non-UTF8 Twine from LLVM")
     }
 }
 
-pub fn last_error() -> Option<String> {
+pub(crate) fn last_error() -> Option<String> {
     unsafe {
         let cstr = LLVMRustGetLastError();
         if cstr.is_null() {
diff --git a/compiler/rustc_codegen_llvm/src/llvm_util.rs b/compiler/rustc_codegen_llvm/src/llvm_util.rs
index 53611c746a7..b4b5d6a5b19 100644
--- a/compiler/rustc_codegen_llvm/src/llvm_util.rs
+++ b/compiler/rustc_codegen_llvm/src/llvm_util.rs
@@ -271,6 +271,7 @@ pub(crate) fn to_llvm_features<'a>(sess: &Session, s: &'a str) -> Option<LLVMFea
         ("aarch64", "fp16") => Some(LLVMFeature::new("fullfp16")),
         // Filter out features that are not supported by the current LLVM version
         ("aarch64", "fpmr") if get_version().0 != 18 => None,
+        ("arm", "fp16") => Some(LLVMFeature::new("fullfp16")),
         // In LLVM 18, `unaligned-scalar-mem` was merged with `unaligned-vector-mem` into a single
         // feature called `fast-unaligned-access`. In LLVM 19, it was split back out.
         ("riscv32" | "riscv64", "unaligned-scalar-mem") if get_version().0 == 18 => {
@@ -303,7 +304,7 @@ pub(crate) fn to_llvm_features<'a>(sess: &Session, s: &'a str) -> Option<LLVMFea
 /// Must express features in the way Rust understands them.
 ///
 /// We do not have to worry about RUSTC_SPECIFIC_FEATURES here, those are handled outside codegen.
-pub fn target_features_cfg(sess: &Session, allow_unstable: bool) -> Vec<Symbol> {
+pub(crate) fn target_features_cfg(sess: &Session, allow_unstable: bool) -> Vec<Symbol> {
     let mut features: FxHashSet<Symbol> = Default::default();
 
     // Add base features for the target.
diff --git a/compiler/rustc_codegen_llvm/src/mono_item.rs b/compiler/rustc_codegen_llvm/src/mono_item.rs
index 33789c6261f..70edee21bd6 100644
--- a/compiler/rustc_codegen_llvm/src/mono_item.rs
+++ b/compiler/rustc_codegen_llvm/src/mono_item.rs
@@ -71,10 +71,7 @@ impl<'tcx> PreDefineCodegenMethods<'tcx> for CodegenCx<'_, 'tcx> {
         // compiler-rt, then we want to implicitly compile everything with hidden
         // visibility as we're going to link this object all over the place but
         // don't want the symbols to get exported.
-        if linkage != Linkage::Internal
-            && linkage != Linkage::Private
-            && self.tcx.is_compiler_builtins(LOCAL_CRATE)
-        {
+        if linkage != Linkage::Internal && self.tcx.is_compiler_builtins(LOCAL_CRATE) {
             llvm::set_visibility(lldecl, llvm::Visibility::Hidden);
         } else {
             llvm::set_visibility(lldecl, base::visibility_to_llvm(visibility));
diff --git a/compiler/rustc_codegen_llvm/src/type_.rs b/compiler/rustc_codegen_llvm/src/type_.rs
index c56ad886120..d61ce417562 100644
--- a/compiler/rustc_codegen_llvm/src/type_.rs
+++ b/compiler/rustc_codegen_llvm/src/type_.rs
@@ -1,14 +1,14 @@
 use std::{fmt, ptr};
 
 use libc::{c_char, c_uint};
-use rustc_abi::{AddressSpace, Align, Integer, Size};
+use rustc_abi::{AddressSpace, Align, Integer, Reg, Size};
 use rustc_codegen_ssa::common::TypeKind;
 use rustc_codegen_ssa::traits::*;
 use rustc_data_structures::small_c_str::SmallCStr;
 use rustc_middle::bug;
 use rustc_middle::ty::layout::TyAndLayout;
 use rustc_middle::ty::{self, Ty};
-use rustc_target::callconv::{CastTarget, FnAbi, Reg};
+use rustc_target::callconv::{CastTarget, FnAbi};
 
 use crate::abi::{FnAbiLlvmExt, LlvmType};
 use crate::context::{CodegenCx, SimpleCx};
@@ -237,11 +237,11 @@ impl<'ll, 'tcx> BaseTypeCodegenMethods<'tcx> for CodegenCx<'ll, 'tcx> {
 
 impl Type {
     /// Creates an integer type with the given number of bits, e.g., i24
-    pub fn ix_llcx(llcx: &llvm::Context, num_bits: u64) -> &Type {
+    pub(crate) fn ix_llcx(llcx: &llvm::Context, num_bits: u64) -> &Type {
         unsafe { llvm::LLVMIntTypeInContext(llcx, num_bits as c_uint) }
     }
 
-    pub fn ptr_llcx(llcx: &llvm::Context) -> &Type {
+    pub(crate) fn ptr_llcx(llcx: &llvm::Context) -> &Type {
         unsafe { llvm::LLVMPointerTypeInContext(llcx, AddressSpace::DATA.0) }
     }
 }