From 642c8d35755887b2c06cb589371c0c13b3530ad7 Mon Sep 17 00:00:00 2001 From: Xin Tong Date: Thu, 15 Nov 2018 18:06:42 +0000 Subject: [LTO] Load sample profile in LTO link step. Summary: Load sample profile in LTO link step. ThinLTO calls populateModulePassManager to load the profile Reviewers: tejohnson, davidxl, danielcdh Subscribers: mehdi_amini, inglorion, steven_wu, dexonsmith, llvm-commits Differential Revision: https://reviews.llvm.org/D54564 llvm-svn: 346971 --- llvm/lib/Transforms/IPO/PassManagerBuilder.cpp | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'llvm/lib/Transforms/IPO') diff --git a/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp b/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp index 19ff2a21cd2..4a6b4aa1d56 100644 --- a/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp +++ b/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp @@ -747,6 +747,12 @@ void PassManagerBuilder::populateModulePassManager( } void PassManagerBuilder::addLTOOptimizationPasses(legacy::PassManagerBase &PM) { + // Load sample profile before running the LTO optimization pipeline. + if (!PGOSampleUse.empty()) { + PM.add(createPruneEHPass()); + PM.add(createSampleProfileLoaderPass(PGOSampleUse)); + } + // Remove unused virtual tables to improve the quality of code generated by // whole-program devirtualization and bitset lowering. PM.add(createGlobalDCEPass()); -- cgit v1.2.3