llvm-wrapper: remove llvm 12 hack

effectively reverts https://github.com/rust-lang/rust/commit/9a8acea78355b604dbeb29bc38bd4dbf7bfce95f

1 files changed, 1 insertions, 6 deletions

diff --git a/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp b/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp
index 6114f7c8678..ed7aa437ddd 100644
--- a/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp
+++ b/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp
@@ -945,12 +945,7 @@ 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;
+        NeedThinLTOBufferPasses = false;
         for (const auto &C : OptimizerLastEPCallbacks)
           C(MPM, OptLevel);
         break;