Auto merge of #145423 - Zalathar:rollup-9jtefpl, r=Zalathar

Rollup of 21 pull requests

Successful merges:

 - rust-lang/rust#118087 (Add Ref/RefMut try_map method)
 - rust-lang/rust#122661 (Change the desugaring of `assert!` for better error output)
 - rust-lang/rust#142640 (Implement autodiff using intrinsics)
 - rust-lang/rust#143075 (compiler: Allow `extern "interrupt" fn() -> !`)
 - rust-lang/rust#144865 (Fix tail calls to `#[track_caller]` functions)
 - rust-lang/rust#144944 (E0793: Clarify that it applies to unions as well)
 - rust-lang/rust#144947 (Fix description of unsigned `checked_exact_div`)
 - rust-lang/rust#145004 (Couple of minor cleanups)
 - rust-lang/rust#145005 (strip prefix of temporary file names when it exceeds filesystem name length limit)
 - rust-lang/rust#145012 (Tail call diagnostics to include lifetime info)
 - rust-lang/rust#145065 (resolve: Introduce `RibKind::Block`)
 - rust-lang/rust#145120 (llvm: Accept new LLVM lifetime format)
 - rust-lang/rust#145189 (Weekly `cargo update`)
 - rust-lang/rust#145235 (Minor `[const]` tweaks)
 - rust-lang/rust#145275 (fix(compiler/rustc_codegen_llvm): apply `target-cpu` attribute)
 - rust-lang/rust#145322 (Resolve the prelude import in `build_reduced_graph`)
 - rust-lang/rust#145331 (Make std use the edition 2024 prelude)
 - rust-lang/rust#145369 (Do not ICE on private type in field of unresolved struct)
 - rust-lang/rust#145378 (Add `FnContext` in parser for diagnostic)
 - rust-lang/rust#145389 ([rustdoc] Revert "rustdoc search: prefer stable items in search results")
 - rust-lang/rust#145392 (coverage: Remove intermediate data structures from mapping creation)

r? `@ghost`
`@rustbot` modify labels: rollup

2 files changed, 7 insertions, 32 deletions

diff --git a/compiler/rustc_codegen_llvm/src/back/lto.rs b/compiler/rustc_codegen_llvm/src/back/lto.rs
index c269f11e931..853d0295238 100644
--- a/compiler/rustc_codegen_llvm/src/back/lto.rs
+++ b/compiler/rustc_codegen_llvm/src/back/lto.rs
@@ -24,9 +24,8 @@ use crate::back::write::{
     self, CodegenDiagnosticsStage, DiagnosticHandlers, bitcode_section_name, save_temp_bitcode,
 };
 use crate::errors::{LlvmError, LtoBitcodeFromRlib};
-use crate::llvm::AttributePlace::Function;
 use crate::llvm::{self, build_string};
-use crate::{LlvmCodegenBackend, ModuleLlvm, SimpleCx, attributes};
+use crate::{LlvmCodegenBackend, ModuleLlvm, SimpleCx};
 
 /// We keep track of the computed LTO cache keys from the previous
 /// session to determine which CGUs we can reuse.
@@ -593,31 +592,6 @@ pub(crate) fn run_pass_manager(
     }
 
     if cfg!(llvm_enzyme) && enable_ad && !thin {
-        let cx =
-            SimpleCx::new(module.module_llvm.llmod(), &module.module_llvm.llcx, cgcx.pointer_size);
-
-        for function in cx.get_functions() {
-            let enzyme_marker = "enzyme_marker";
-            if attributes::has_string_attr(function, enzyme_marker) {
-                // Sanity check: Ensure 'noinline' is present before replacing it.
-                assert!(
-                    attributes::has_attr(function, Function, llvm::AttributeKind::NoInline),
-                    "Expected __enzyme function to have 'noinline' before adding 'alwaysinline'"
-                );
-
-                attributes::remove_from_llfn(function, Function, llvm::AttributeKind::NoInline);
-                attributes::remove_string_attr_from_llfn(function, enzyme_marker);
-
-                assert!(
-                    !attributes::has_string_attr(function, enzyme_marker),
-                    "Expected function to not have 'enzyme_marker'"
-                );
-
-                let always_inline = llvm::AttributeKind::AlwaysInline.create_attr(cx.llcx);
-                attributes::apply_to_llfn(function, Function, &[always_inline]);
-            }
-        }
-
         let opt_stage = llvm::OptStage::FatLTO;
         let stage = write::AutodiffStage::PostAD;
         if !config.autodiff.contains(&config::AutoDiff::NoPostopt) {
diff --git a/compiler/rustc_codegen_llvm/src/back/write.rs b/compiler/rustc_codegen_llvm/src/back/write.rs
index 85a06f457eb..62998003ca1 100644
--- a/compiler/rustc_codegen_llvm/src/back/write.rs
+++ b/compiler/rustc_codegen_llvm/src/back/write.rs
@@ -862,7 +862,7 @@ pub(crate) fn codegen(
                     .generic_activity_with_arg("LLVM_module_codegen_embed_bitcode", &*module.name);
                 let thin_bc =
                     module.thin_lto_buffer.as_deref().expect("cannot find embedded bitcode");
-                embed_bitcode(cgcx, llcx, llmod, &config.bc_cmdline, &thin_bc);
+                embed_bitcode(cgcx, llcx, llmod, &thin_bc);
             }
         }
 
@@ -1058,7 +1058,6 @@ fn embed_bitcode(
     cgcx: &CodegenContext<LlvmCodegenBackend>,
     llcx: &llvm::Context,
     llmod: &llvm::Module,
-    cmdline: &str,
     bitcode: &[u8],
 ) {
     // We're adding custom sections to the output object file, but we definitely
@@ -1074,7 +1073,9 @@ fn embed_bitcode(
     // * Mach-O - this is for macOS. Inspecting the source code for the native
     //   linker here shows that the `.llvmbc` and `.llvmcmd` sections are
     //   automatically skipped by the linker. In that case there's nothing extra
-    //   that we need to do here.
+    //   that we need to do here. We do need to make sure that the
+    //   `__LLVM,__cmdline` section exists even though it is empty as otherwise
+    //   ld64 rejects the object file.
     //
     // * Wasm - the native LLD linker is hard-coded to skip `.llvmbc` and
     //   `.llvmcmd` sections, so there's nothing extra we need to do.
@@ -1111,7 +1112,7 @@ fn embed_bitcode(
         llvm::set_linkage(llglobal, llvm::Linkage::PrivateLinkage);
         llvm::LLVMSetGlobalConstant(llglobal, llvm::True);
 
-        let llconst = common::bytes_in_context(llcx, cmdline.as_bytes());
+        let llconst = common::bytes_in_context(llcx, &[]);
         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_darwin {
@@ -1128,7 +1129,7 @@ fn embed_bitcode(
         let section_flags = if cgcx.is_pe_coff { "n" } else { "e" };
         let asm = create_section_with_flags_asm(".llvmbc", section_flags, bitcode);
         llvm::append_module_inline_asm(llmod, &asm);
-        let asm = create_section_with_flags_asm(".llvmcmd", section_flags, cmdline.as_bytes());
+        let asm = create_section_with_flags_asm(".llvmcmd", section_flags, &[]);
         llvm::append_module_inline_asm(llmod, &asm);
     }
 }