[Passes] Remove legacy PM version of BDCE (aka BitTrackingDCEPass)

BDCE is not used by the codegen pipeline so we should not need the
legacy PM version of the pass any longer.

Differential Revision: https://reviews.llvm.org/D148335

diff --git a/llvm/include/llvm/InitializePasses.h b/llvm/include/llvm/InitializePasses.h
index 7bf013f..23acfa7 100644 (file)
--- a/llvm/include/llvm/InitializePasses.h
+++ b/llvm/include/llvm/InitializePasses.h
@@ -62,7 +62,6 @@ void initializeAssumptionCacheTrackerPass(PassRegistry&);
 void initializeAtomicExpandPass(PassRegistry&);
 void initializeBasicBlockSectionsProfileReaderPass(PassRegistry &);
 void initializeBasicBlockSectionsPass(PassRegistry &);
-void initializeBDCELegacyPassPass(PassRegistry&);
 void initializeBarrierNoopPass(PassRegistry&);
 void initializeBasicAAWrapperPassPass(PassRegistry&);
 void initializeBlockFrequencyInfoWrapperPassPass(PassRegistry&);

diff --git a/llvm/include/llvm/LinkAllPasses.h b/llvm/include/llvm/LinkAllPasses.h
index 55d2a35..f2a662e 100644 (file)
--- a/llvm/include/llvm/LinkAllPasses.h
+++ b/llvm/include/llvm/LinkAllPasses.h
@@ -69,7 +69,6 @@ namespace {
         return;
 
       (void) llvm::createAAEvalPass();
-      (void)llvm::createBitTrackingDCEPass();
       (void) llvm::createAlignmentFromAssumptionsPass();
       (void) llvm::createBasicAAWrapperPass();
       (void) llvm::createSCEVAAWrapperPass();

diff --git a/llvm/include/llvm/Transforms/Scalar.h b/llvm/include/llvm/Transforms/Scalar.h
index c188df4..24f7192 100644 (file)
--- a/llvm/include/llvm/Transforms/Scalar.h
+++ b/llvm/include/llvm/Transforms/Scalar.h
@@ -75,13 +75,6 @@ Pass *createLoopGuardWideningPass();
 
 //===----------------------------------------------------------------------===//
 //
-// BitTrackingDCE - This pass uses a bit-tracking DCE algorithm in order to
-// remove computations of dead bits.
-//
-FunctionPass *createBitTrackingDCEPass();
-
-//===----------------------------------------------------------------------===//
-//
 // SROA - Replace aggregates or pieces of aggregates with scalar SSA values.
 //
 FunctionPass *createSROAPass(bool PreserveCFG = true);

diff --git a/llvm/lib/Transforms/Scalar/BDCE.cpp b/llvm/lib/Transforms/Scalar/BDCE.cpp
index 24d2f3d..1fa2c75 100644 (file)
--- a/llvm/lib/Transforms/Scalar/BDCE.cpp
+++ b/llvm/lib/Transforms/Scalar/BDCE.cpp
@@ -23,11 +23,8 @@
 #include "llvm/IR/IRBuilder.h"
 #include "llvm/IR/InstIterator.h"
 #include "llvm/IR/Instructions.h"
-#include "llvm/InitializePasses.h"
-#include "llvm/Pass.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/raw_ostream.h"
-#include "llvm/Transforms/Scalar.h"
 #include "llvm/Transforms/Utils/Local.h"
 using namespace llvm;
 
@@ -173,34 +170,3 @@ PreservedAnalyses BDCEPass::run(Function &F, FunctionAnalysisManager &AM) {
   PA.preserveSet<CFGAnalyses>();
   return PA;
 }
-
-namespace {
-struct BDCELegacyPass : public FunctionPass {
-  static char ID; // Pass identification, replacement for typeid
-  BDCELegacyPass() : FunctionPass(ID) {
-    initializeBDCELegacyPassPass(*PassRegistry::getPassRegistry());
-  }
-
-  bool runOnFunction(Function &F) override {
-    if (skipFunction(F))
-      return false;
-    auto &DB = getAnalysis<DemandedBitsWrapperPass>().getDemandedBits();
-    return bitTrackingDCE(F, DB);
-  }
-
-  void getAnalysisUsage(AnalysisUsage &AU) const override {
-    AU.setPreservesCFG();
-    AU.addRequired<DemandedBitsWrapperPass>();
-    AU.addPreserved<GlobalsAAWrapperPass>();
-  }
-};
-}
-
-char BDCELegacyPass::ID = 0;
-INITIALIZE_PASS_BEGIN(BDCELegacyPass, "bdce",
-                      "Bit-Tracking Dead Code Elimination", false, false)
-INITIALIZE_PASS_DEPENDENCY(DemandedBitsWrapperPass)
-INITIALIZE_PASS_END(BDCELegacyPass, "bdce",
-                    "Bit-Tracking Dead Code Elimination", false, false)
-
-FunctionPass *llvm::createBitTrackingDCEPass() { return new BDCELegacyPass(); }

diff --git a/llvm/lib/Transforms/Scalar/Scalar.cpp b/llvm/lib/Transforms/Scalar/Scalar.cpp
index 6e08091..a6e058c 100644 (file)
--- a/llvm/lib/Transforms/Scalar/Scalar.cpp
+++ b/llvm/lib/Transforms/Scalar/Scalar.cpp
@@ -27,7 +27,6 @@ using namespace llvm;
 /// initializeScalarOptsPasses - Initialize all passes linked into the
 /// ScalarOpts library.
 void llvm::initializeScalarOpts(PassRegistry &Registry) {
-  initializeBDCELegacyPassPass(Registry);
   initializeAlignmentFromAssumptionsPass(Registry);
   initializeCallSiteSplittingLegacyPassPass(Registry);
   initializeConstantHoistingLegacyPassPass(Registry);