diff options
Diffstat (limited to 'compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp')
| -rw-r--r-- | compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp b/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp index 79babd27a30..2f28162f908 100644 --- a/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp +++ b/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp @@ -1015,7 +1015,12 @@ LLVMRustOptimizeWithNewPassManager( case LLVMRustOptStage::PreLinkThinLTO: #if LLVM_VERSION_GE(12, 0) MPM = PB.buildThinLTOPreLinkDefaultPipeline(OptLevel); - NeedThinLTOBufferPasses = false; + // 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; #else MPM = PB.buildThinLTOPreLinkDefaultPipeline(OptLevel, DebugPassManager); #endif |