Rollup merge of #119885 - DianQK:revert-pr-113923, r=petrochenkov

Revert #113923

Per [#t-compiler/meetings > [weekly] 2024-01-11](https://rust-lang.zulipchat.com/#narrow/stream/238009-t-compiler.2Fmeetings/topic/.5Bweekly.5D.202024-01-11) discussion, revert #113923. Also revert associated #118568.

The PR #113923 causes the regression issue #118609. We need more time to find a proper solution.

Discussions start at [412365838](https://rust-lang.zulipchat.com/#narrow/stream/238009-t-compiler.2Fmeetings/topic/.5Bweekly.5D.202024-01-11/near/412365838) and continue to [412369643](https://rust-lang.zulipchat.com/#narrow/stream/238009-t-compiler.2Fmeetings/topic/.5Bweekly.5D.202024-01-11/near/412369643).

Fixes #118609.

r? compiler

3 files changed, 13 insertions, 5 deletions

diff --git a/compiler/rustc_codegen_llvm/src/back/lto.rs b/compiler/rustc_codegen_llvm/src/back/lto.rs
index e9e8ade09b7..42bd8687042 100644
--- a/compiler/rustc_codegen_llvm/src/back/lto.rs
+++ b/compiler/rustc_codegen_llvm/src/back/lto.rs
@@ -60,7 +60,7 @@ fn prepare_lto(
     };
 
     let symbol_filter = &|&(ref name, info): &(String, SymbolExportInfo)| {
-        if info.level.is_below_threshold(export_threshold) || info.used || info.used_compiler {
+        if info.level.is_below_threshold(export_threshold) || info.used {
             Some(CString::new(name.as_str()).unwrap())
         } else {
             None
diff --git a/compiler/rustc_codegen_llvm/src/back/write.rs b/compiler/rustc_codegen_llvm/src/back/write.rs
index a912ef9e755..27cb0366f17 100644
--- a/compiler/rustc_codegen_llvm/src/back/write.rs
+++ b/compiler/rustc_codegen_llvm/src/back/write.rs
@@ -569,6 +569,7 @@ pub(crate) unsafe fn llvm_optimize(
         unroll_loops,
         config.vectorize_slp,
         config.vectorize_loop,
+        config.no_builtins,
         config.emit_lifetime_markers,
         sanitizer_options.as_ref(),
         pgo_gen_path.as_ref().map_or(std::ptr::null(), |s| s.as_ptr()),
@@ -677,6 +678,7 @@ pub(crate) unsafe fn codegen(
         unsafe fn with_codegen<'ll, F, R>(
             tm: &'ll llvm::TargetMachine,
             llmod: &'ll llvm::Module,
+            no_builtins: bool,
             f: F,
         ) -> R
         where
@@ -684,7 +686,7 @@ pub(crate) unsafe fn codegen(
         {
             let cpm = llvm::LLVMCreatePassManager();
             llvm::LLVMAddAnalysisPasses(tm, cpm);
-            llvm::LLVMRustAddLibraryInfo(cpm, llmod);
+            llvm::LLVMRustAddLibraryInfo(cpm, llmod, no_builtins);
             f(cpm)
         }
 
@@ -785,7 +787,7 @@ pub(crate) unsafe fn codegen(
             } else {
                 llmod
             };
-            with_codegen(tm, llmod, |cpm| {
+            with_codegen(tm, llmod, config.no_builtins, |cpm| {
                 write_output_file(
                     dcx,
                     tm,
@@ -820,7 +822,7 @@ pub(crate) unsafe fn codegen(
                     (_, SplitDwarfKind::Split) => Some(dwo_out.as_path()),
                 };
 
-                with_codegen(tm, llmod, |cpm| {
+                with_codegen(tm, llmod, config.no_builtins, |cpm| {
                     write_output_file(
                         dcx,
                         tm,
diff --git a/compiler/rustc_codegen_llvm/src/llvm/ffi.rs b/compiler/rustc_codegen_llvm/src/llvm/ffi.rs
index aefca6b34f5..ee73c6b4756 100644
--- a/compiler/rustc_codegen_llvm/src/llvm/ffi.rs
+++ b/compiler/rustc_codegen_llvm/src/llvm/ffi.rs
@@ -2173,8 +2173,13 @@ extern "C" {
         ArgsCstrBuff: *const c_char,
         ArgsCstrBuffLen: usize,
     ) -> *mut TargetMachine;
+
     pub fn LLVMRustDisposeTargetMachine(T: *mut TargetMachine);
-    pub fn LLVMRustAddLibraryInfo<'a>(PM: &PassManager<'a>, M: &'a Module);
+    pub fn LLVMRustAddLibraryInfo<'a>(
+        PM: &PassManager<'a>,
+        M: &'a Module,
+        DisableSimplifyLibCalls: bool,
+    );
     pub fn LLVMRustWriteOutputFile<'a>(
         T: &'a TargetMachine,
         PM: &PassManager<'a>,
@@ -2196,6 +2201,7 @@ extern "C" {
         UnrollLoops: bool,
         SLPVectorize: bool,
         LoopVectorize: bool,
+        DisableSimplifyLibCalls: bool,
         EmitLifetimeMarkers: bool,
         SanitizerOptions: Option<&SanitizerOptions>,
         PGOGenPath: *const c_char,