[LegacyPM] Remove ControlHeightReductionLegacyPass

This pass tries to reduce the number of conditional branches in the hot path
based on profile. It's mostly a no-op after legacy PGO passes are moved.

1 files changed, 0 insertions, 53 deletions

diff --git a/llvm/lib/Transforms/Instrumentation/ControlHeightReduction.cpp b/llvm/lib/Transforms/Instrumentation/ControlHeightReduction.cpp
index e5c0705..adc007d 100644
--- a/llvm/lib/Transforms/Instrumentation/ControlHeightReduction.cpp
+++ b/llvm/lib/Transforms/Instrumentation/ControlHeightReduction.cpp
@@ -103,47 +103,6 @@ static void parseCHRFilterFiles() {
 }
 
 namespace {
-class ControlHeightReductionLegacyPass : public FunctionPass {
-public:
-  static char ID;
-
-  ControlHeightReductionLegacyPass() : FunctionPass(ID) {
-    initializeControlHeightReductionLegacyPassPass(
-        *PassRegistry::getPassRegistry());
-    parseCHRFilterFiles();
-  }
-
-  bool runOnFunction(Function &F) override;
-  void getAnalysisUsage(AnalysisUsage &AU) const override {
-    AU.addRequired<BlockFrequencyInfoWrapperPass>();
-    AU.addRequired<DominatorTreeWrapperPass>();
-    AU.addRequired<ProfileSummaryInfoWrapperPass>();
-    AU.addRequired<RegionInfoPass>();
-    AU.addPreserved<GlobalsAAWrapperPass>();
-  }
-};
-} // end anonymous namespace
-
-char ControlHeightReductionLegacyPass::ID = 0;
-
-INITIALIZE_PASS_BEGIN(ControlHeightReductionLegacyPass,
-                      "chr",
-                      "Reduce control height in the hot paths",
-                      false, false)
-INITIALIZE_PASS_DEPENDENCY(BlockFrequencyInfoWrapperPass)
-INITIALIZE_PASS_DEPENDENCY(DominatorTreeWrapperPass)
-INITIALIZE_PASS_DEPENDENCY(ProfileSummaryInfoWrapperPass)
-INITIALIZE_PASS_DEPENDENCY(RegionInfoPass)
-INITIALIZE_PASS_END(ControlHeightReductionLegacyPass,
-                    "chr",
-                    "Reduce control height in the hot paths",
-                    false, false)
-
-FunctionPass *llvm::createControlHeightReductionLegacyPass() {
-  return new ControlHeightReductionLegacyPass();
-}
-
-namespace {
 
 struct CHRStats {
   CHRStats() = default;
@@ -2083,18 +2042,6 @@ bool CHR::run() {
   return Changed;
 }
 
-bool ControlHeightReductionLegacyPass::runOnFunction(Function &F) {
-  BlockFrequencyInfo &BFI =
-      getAnalysis<BlockFrequencyInfoWrapperPass>().getBFI();
-  DominatorTree &DT = getAnalysis<DominatorTreeWrapperPass>().getDomTree();
-  ProfileSummaryInfo &PSI =
-      getAnalysis<ProfileSummaryInfoWrapperPass>().getPSI();
-  RegionInfo &RI = getAnalysis<RegionInfoPass>().getRegionInfo();
-  std::unique_ptr<OptimizationRemarkEmitter> OwnedORE =
-      std::make_unique<OptimizationRemarkEmitter>(&F);
-  return CHR(F, BFI, DT, PSI, RI, *OwnedORE).run();
-}
-
 namespace llvm {
 
 ControlHeightReductionPass::ControlHeightReductionPass() {