Revert "Auto merge of #113923 - DianQK:restore-no-builtins-lto, r=pnkfelix"

This reverts commit 8c2b577217, reversing
changes made to 9cf18e98f8.

compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp

@@ -531,9 +531,12 @@ 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) {
+extern "C" void LLVMRustAddLibraryInfo(LLVMPassManagerRef PMR, LLVMModuleRef M,
+                                       bool DisableSimplifyLibCalls) {
   Triple TargetTriple(unwrap(M)->getTargetTriple());
   TargetLibraryInfoImpl TLII(TargetTriple);
+  if (DisableSimplifyLibCalls)
+    TLII.disableAllFunctions();
   unwrap(PMR)->add(new TargetLibraryInfoWrapperPass(TLII));
 }
 
@@ -700,7 +703,7 @@ LLVMRustOptimize(
     bool IsLinkerPluginLTO,
     bool NoPrepopulatePasses, bool VerifyIR, bool UseThinLTOBuffers,
     bool MergeFunctions, bool UnrollLoops, bool SLPVectorize, bool LoopVectorize,
-    bool EmitLifetimeMarkers,
+    bool DisableSimplifyLibCalls, bool EmitLifetimeMarkers,
     LLVMRustSanitizerOptions *SanitizerOptions,
     const char *PGOGenPath, const char *PGOUsePath,
     bool InstrumentCoverage, const char *InstrProfileOutput,
@@ -800,6 +803,8 @@ 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);