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| author | Teresa Johnson <tejohnson@google.com> | 2018-10-23 22:57:40 +0000 |
|---|---|---|
| committer | Teresa Johnson <tejohnson@google.com> | 2018-10-23 22:57:40 +0000 |
| commit | d725335bd19f5aaaea1d387e974ee4c84ec782f2 (patch) | |
| tree | 47d9601c3f24078c78827d94a831af5b22c20daa /llvm/lib/Passes/PassBuilder.cpp | |
| parent | 3513dc245ec6666d20faf3a05a0f8b5e051fba0b (diff) | |
| download | bcm5719-llvm-d725335bd19f5aaaea1d387e974ee4c84ec782f2.tar.gz bcm5719-llvm-d725335bd19f5aaaea1d387e974ee4c84ec782f2.zip | |
[hot-cold-split] Only perform splitting in ThinLTO backend post-link
Summary:
Fix the new PM to only perform hot cold splitting once during ThinLTO,
by skipping it in the pre-link phase.
This was already fixed in the old PM by the move of the hot cold split
pass later (after the early return when PrepareForThinLTO) by r344869.
Reviewers: vsk, sebpop, hiraditya
Subscribers: mehdi_amini, inglorion, eraman, steven_wu, dexonsmith, llvm-commits
Differential Revision: https://reviews.llvm.org/D53611
llvm-svn: 345096
Diffstat (limited to 'llvm/lib/Passes/PassBuilder.cpp')
| -rw-r--r-- | llvm/lib/Passes/PassBuilder.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/llvm/lib/Passes/PassBuilder.cpp b/llvm/lib/Passes/PassBuilder.cpp index 8b333b7f8a6..90561b05e62 100644 --- a/llvm/lib/Passes/PassBuilder.cpp +++ b/llvm/lib/Passes/PassBuilder.cpp @@ -710,7 +710,9 @@ PassBuilder::buildModuleSimplificationPipeline(OptimizationLevel Level, MainCGPipeline.addPass(createCGSCCToFunctionPassAdaptor( buildFunctionSimplificationPipeline(Level, Phase, DebugLogging))); - if (EnableHotColdSplit) + // We only want to do hot cold splitting once for ThinLTO, during the + // post-link ThinLTO. + if (EnableHotColdSplit && Phase != ThinLTOPhase::PreLink) MPM.addPass(HotColdSplittingPass()); for (auto &C : CGSCCOptimizerLateEPCallbacks) |
