Removes the useless DisableSimplifyLibCalls parameter.

After applying no_builtins to the function attributes, we can remove the
DisableSimplifyLibCalls parameter.

Author: dianqk

compiler/rustc_codegen_llvm/src/back/write.rs

@@ -517,7 +517,6 @@ 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()),
@@ -632,15 +631,14 @@ 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
             F: FnOnce(&'ll mut PassManager<'ll>) -> R,
         {
             let cpm = llvm::LLVMCreatePassManager();
             llvm::LLVMAddAnalysisPasses(tm, cpm);
-            llvm::LLVMRustAddLibraryInfo(cpm, llmod, no_builtins);
+            llvm::LLVMRustAddLibraryInfo(cpm, llmod);
             f(cpm)
         }
 
@@ -743,7 +741,7 @@ pub(crate) unsafe fn codegen(
             } else {
                 llmod
             };
-            with_codegen(tm, llmod, config.no_builtins, |cpm| {
+            with_codegen(tm, llmod, |cpm| {
                 write_output_file(
                     diag_handler,
                     tm,
@@ -778,7 +776,7 @@ pub(crate) unsafe fn codegen(
                     (_, SplitDwarfKind::Split) => Some(dwo_out.as_path()),
                 };
 
-                with_codegen(tm, llmod, config.no_builtins, |cpm| {
+                with_codegen(tm, llmod, |cpm| {
                     write_output_file(
                         diag_handler,
                         tm,

compiler/rustc_codegen_llvm/src/llvm/ffi.rs

@@ -2123,11 +2123,7 @@ extern "C" {
         ForceEmulatedTls: bool,
     ) -> Option<&'static mut TargetMachine>;
     pub fn LLVMRustDisposeTargetMachine(T: &'static mut TargetMachine);
-    pub fn LLVMRustAddLibraryInfo<'a>(
-        PM: &PassManager<'a>,
-        M: &'a Module,
-        DisableSimplifyLibCalls: bool,
-    );
+    pub fn LLVMRustAddLibraryInfo<'a>(PM: &PassManager<'a>, M: &'a Module);
     pub fn LLVMRustWriteOutputFile<'a>(
         T: &'a TargetMachine,
         PM: &PassManager<'a>,
@@ -2149,7 +2145,6 @@ extern "C" {
         UnrollLoops: bool,
         SLPVectorize: bool,
         LoopVectorize: bool,
-        DisableSimplifyLibCalls: bool,
         EmitLifetimeMarkers: bool,
         SanitizerOptions: Option<&SanitizerOptions>,
         PGOGenPath: *const c_char,

compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp

@@ -466,12 +466,9 @@ extern "C" void LLVMRustDisposeTargetMachine(LLVMTargetMachineRef TM) {
 
 // Unfortunately, the LLVM C API doesn't provide a way to create the
 // TargetLibraryInfo pass, so we use this method to do so.
-extern "C" void LLVMRustAddLibraryInfo(LLVMPassManagerRef PMR, LLVMModuleRef M,
-                                       bool DisableSimplifyLibCalls) {
+extern "C" void LLVMRustAddLibraryInfo(LLVMPassManagerRef PMR, LLVMModuleRef M) {
   Triple TargetTriple(unwrap(M)->getTargetTriple());
   TargetLibraryInfoImpl TLII(TargetTriple);
-  if (DisableSimplifyLibCalls)
-    TLII.disableAllFunctions();
   unwrap(PMR)->add(new TargetLibraryInfoWrapperPass(TLII));
 }
 
@@ -630,7 +627,7 @@ LLVMRustOptimize(
     bool IsLinkerPluginLTO,
     bool NoPrepopulatePasses, bool VerifyIR, bool UseThinLTOBuffers,
     bool MergeFunctions, bool UnrollLoops, bool SLPVectorize, bool LoopVectorize,
-    bool DisableSimplifyLibCalls, bool EmitLifetimeMarkers,
+    bool EmitLifetimeMarkers,
     LLVMRustSanitizerOptions *SanitizerOptions,
     const char *PGOGenPath, const char *PGOUsePath,
     bool InstrumentCoverage, const char *InstrProfileOutput,
@@ -722,8 +719,6 @@ LLVMRustOptimize(
 
   Triple TargetTriple(TheModule->getTargetTriple());
   std::unique_ptr<TargetLibraryInfoImpl> TLII(new TargetLibraryInfoImpl(TargetTriple));
-  if (DisableSimplifyLibCalls)
-    TLII->disableAllFunctions();
   FAM.registerPass([&] { return TargetLibraryAnalysis(*TLII); });
 
   PB.registerModuleAnalyses(MAM);