[PM] Port BDCE to the new pass manager.
llvm-svn: 270647
diff --git a/llvm/lib/Transforms/Scalar/BDCE.cpp b/llvm/lib/Transforms/Scalar/BDCE.cpp
index a357280..a1331dd 100644
--- a/llvm/lib/Transforms/Scalar/BDCE.cpp
+++ b/llvm/lib/Transforms/Scalar/BDCE.cpp
@@ -14,11 +14,11 @@
//
//===----------------------------------------------------------------------===//
-#include "llvm/Transforms/Scalar.h"
+#include "llvm/Transforms/Scalar/BDCE.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/Statistic.h"
-#include "llvm/Analysis/GlobalsModRef.h"
#include "llvm/Analysis/DemandedBits.h"
+#include "llvm/Analysis/GlobalsModRef.h"
#include "llvm/IR/CFG.h"
#include "llvm/IR/InstIterator.h"
#include "llvm/IR/Instructions.h"
@@ -27,6 +27,7 @@
#include "llvm/Pass.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
+#include "llvm/Transforms/Scalar.h"
using namespace llvm;
#define DEBUG_TYPE "bdce"
@@ -34,35 +35,7 @@
STATISTIC(NumRemoved, "Number of instructions removed (unused)");
STATISTIC(NumSimplified, "Number of instructions trivialized (dead bits)");
-namespace {
-struct BDCE : public FunctionPass {
- static char ID; // Pass identification, replacement for typeid
- BDCE() : FunctionPass(ID) {
- initializeBDCEPass(*PassRegistry::getPassRegistry());
- }
-
- bool runOnFunction(Function& F) override;
-
- void getAnalysisUsage(AnalysisUsage& AU) const override {
- AU.setPreservesCFG();
- AU.addRequired<DemandedBitsWrapperPass>();
- AU.addPreserved<GlobalsAAWrapperPass>();
- }
-};
-}
-
-char BDCE::ID = 0;
-INITIALIZE_PASS_BEGIN(BDCE, "bdce", "Bit-Tracking Dead Code Elimination",
- false, false)
-INITIALIZE_PASS_DEPENDENCY(DemandedBitsWrapperPass)
-INITIALIZE_PASS_END(BDCE, "bdce", "Bit-Tracking Dead Code Elimination",
- false, false)
-
-bool BDCE::runOnFunction(Function& F) {
- if (skipFunction(F))
- return false;
- auto &DB = getAnalysis<DemandedBitsWrapperPass>().getDemandedBits();
-
+static bool bitTrackingDCE(Function &F, DemandedBits &DB) {
SmallVector<Instruction*, 128> Worklist;
bool Changed = false;
for (Instruction &I : instructions(F)) {
@@ -96,7 +69,40 @@
return Changed;
}
-FunctionPass *llvm::createBitTrackingDCEPass() {
- return new BDCE();
+PreservedAnalyses BDCEPass::run(Function &F, FunctionAnalysisManager &AM) {
+ auto &DB = AM.getResult<DemandedBitsAnalysis>(F);
+ if (bitTrackingDCE(F, DB))
+ return PreservedAnalyses::none();
+ return PreservedAnalyses::all();
}
+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(); }