3 files changed, 3 insertions, 15 deletions
diff --git a/compiler/rustc_llvm/llvm-wrapper/LLVMWrapper.h b/compiler/rustc_llvm/llvm-wrapper/LLVMWrapper.h
index 5bfffc5d911..6d578c97f3f 100644
--- a/compiler/rustc_llvm/llvm-wrapper/LLVMWrapper.h
+++ b/compiler/rustc_llvm/llvm-wrapper/LLVMWrapper.h
@@ -76,7 +76,6 @@ enum LLVMRustAttribute {
   SanitizeMemory = 22,
   NonLazyBind = 23,
   OptimizeNone = 24,
-  ReturnsTwice = 25,
   ReadNone = 26,
   SanitizeHWAddress = 28,
   WillReturn = 29,
diff --git a/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp b/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp
index 6114f7c8678..3b6bf03686b 100644
--- a/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp
+++ b/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp
@@ -934,10 +934,8 @@ LLVMRustOptimize(
     } else {
       for (const auto &C : PipelineStartEPCallbacks)
         PB.registerPipelineStartEPCallback(C);
-      if (OptStage != LLVMRustOptStage::PreLinkThinLTO) {
-        for (const auto &C : OptimizerLastEPCallbacks)
-          PB.registerOptimizerLastEPCallback(C);
-      }
+      for (const auto &C : OptimizerLastEPCallbacks)
+        PB.registerOptimizerLastEPCallback(C);
 
       switch (OptStage) {
       case LLVMRustOptStage::PreLinkNoLTO:
@@ -945,14 +943,7 @@ LLVMRustOptimize(
         break;
       case LLVMRustOptStage::PreLinkThinLTO:
         MPM = PB.buildThinLTOPreLinkDefaultPipeline(OptLevel);
-        // The ThinLTOPreLink pipeline already includes ThinLTOBuffer passes. However, callback
-        // passes may still run afterwards. This means we need to run the buffer passes again.
-        // FIXME: In LLVM 13, the ThinLTOPreLink pipeline also runs OptimizerLastEPCallbacks
-        // before the RequiredLTOPreLinkPasses, in which case we can remove these hacks.
-        if (OptimizerLastEPCallbacks.empty())
-          NeedThinLTOBufferPasses = false;
-        for (const auto &C : OptimizerLastEPCallbacks)
-          C(MPM, OptLevel);
+        NeedThinLTOBufferPasses = false;
         break;
       case LLVMRustOptStage::PreLinkFatLTO:
         MPM = PB.buildLTOPreLinkDefaultPipeline(OptLevel);
diff --git a/compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp b/compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp
index 0df7b7eed11..a2dfebec594 100644
--- a/compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp
+++ b/compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp
@@ -250,8 +250,6 @@ static Attribute::AttrKind fromRust(LLVMRustAttribute Kind) {
     return Attribute::NonLazyBind;
   case OptimizeNone:
     return Attribute::OptimizeNone;
-  case ReturnsTwice:
-    return Attribute::ReturnsTwice;
   case ReadNone:
     return Attribute::ReadNone;
   case SanitizeHWAddress: