//
//===----------------------------------------------------------------------===//
-#define DEBUG_TYPE "dce"
#include "llvm/Transforms/Scalar.h"
-#include "llvm/Transforms/Utils/Local.h"
-#include "llvm/Instruction.h"
-#include "llvm/Pass.h"
-#include "llvm/Support/InstIterator.h"
-#include "llvm/Target/TargetLibraryInfo.h"
#include "llvm/ADT/Statistic.h"
+#include "llvm/IR/InstIterator.h"
+#include "llvm/IR/Instruction.h"
+#include "llvm/Pass.h"
+#include "llvm/Analysis/TargetLibraryInfo.h"
+#include "llvm/Transforms/Utils/Local.h"
using namespace llvm;
+#define DEBUG_TYPE "dce"
+
STATISTIC(DIEEliminated, "Number of insts removed by DIE pass");
STATISTIC(DCEEliminated, "Number of insts removed");
DeadInstElimination() : BasicBlockPass(ID) {
initializeDeadInstEliminationPass(*PassRegistry::getPassRegistry());
}
- virtual bool runOnBasicBlock(BasicBlock &BB) {
- TargetLibraryInfo *TLI = getAnalysisIfAvailable<TargetLibraryInfo>();
+ bool runOnBasicBlock(BasicBlock &BB) override {
+ if (skipOptnoneFunction(BB))
+ return false;
+ auto *TLIP = getAnalysisIfAvailable<TargetLibraryInfoWrapperPass>();
+ TargetLibraryInfo *TLI = TLIP ? &TLIP->getTLI() : nullptr;
bool Changed = false;
for (BasicBlock::iterator DI = BB.begin(); DI != BB.end(); ) {
Instruction *Inst = DI++;
return Changed;
}
- virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+ void getAnalysisUsage(AnalysisUsage &AU) const override {
AU.setPreservesCFG();
}
};
initializeDCEPass(*PassRegistry::getPassRegistry());
}
- virtual bool runOnFunction(Function &F);
+ bool runOnFunction(Function &F) override;
- virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+ void getAnalysisUsage(AnalysisUsage &AU) const override {
AU.setPreservesCFG();
}
};
INITIALIZE_PASS(DCE, "dce", "Dead Code Elimination", false, false)
bool DCE::runOnFunction(Function &F) {
- TargetLibraryInfo *TLI = getAnalysisIfAvailable<TargetLibraryInfo>();
+ if (skipOptnoneFunction(F))
+ return false;
+
+ auto *TLIP = getAnalysisIfAvailable<TargetLibraryInfoWrapperPass>();
+ TargetLibraryInfo *TLI = TLIP ? &TLIP->getTLI() : nullptr;
// Start out with all of the instructions in the worklist...
std::vector<Instruction*> WorkList;
I->eraseFromParent();
// Remove the instruction from the worklist if it still exists in it.
- for (std::vector<Instruction*>::iterator WI = WorkList.begin();
- WI != WorkList.end(); ) {
- if (*WI == I)
- WI = WorkList.erase(WI);
- else
- ++WI;
- }
+ WorkList.erase(std::remove(WorkList.begin(), WorkList.end(), I),
+ WorkList.end());
MadeChange = true;
++DCEEliminated;