[PATCH] D138332: [Passes] Don't add CHR pass for CSIRInstr build in PostLink

[Rong Xu via Phabricator via llvm-commits]

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Don't add ControlHeightReductin (CHR) pass for CSIRInstr build in the PostLink because the profile is the same as the PreLink compilation.


https://reviews.llvm.org/D138332

Files:
  llvm/lib/Passes/PassBuilderPipelines.cpp


Index: llvm/lib/Passes/PassBuilderPipelines.cpp
===================================================================
--- llvm/lib/Passes/PassBuilderPipelines.cpp
+++ llvm/lib/Passes/PassBuilderPipelines.cpp
@@ -603,8 +603,12 @@
   FPM.addPass(InstCombinePass());
   invokePeepholeEPCallbacks(FPM, Level);
 
+  // Don't add CHR pass for CSIRInstr build in PostLink as the profile
+  // is still the same as the PreLink compilation.
   if (EnableCHR && Level == OptimizationLevel::O3 && PGOOpt &&
-      (PGOOpt->Action == PGOOptions::IRUse ||
+      ((PGOOpt->Action == PGOOptions::IRUse &&
+        (Phase != ThinOrFullLTOPhase::ThinLTOPostLink ||
+         PGOOpt->CSAction != PGOOptions::CSIRInstr)) ||
        PGOOpt->Action == PGOOptions::SampleUse))
     FPM.addPass(ControlHeightReductionPass());
 


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