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Replace calls to ConstantFoldInstruction with calls to SimplifyInstruction

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in two places that are really interested in simplified instructions, not
constants.

llvm-svn: 120044
This commit is contained in:
Duncan Sands 2010-11-23 20:26:33 +00:00
parent 20cae200d0
commit 42e2ffcd33
2 changed files with 12 additions and 11 deletions
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12
lib/Transforms/Scalar/TailDuplication.cpp
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@ -26,14 +26,14 @@
#include "llvm/IntrinsicInst.h"
#include "llvm/Pass.h"
#include "llvm/Type.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/Analysis/InstructionSimplify.h"
#include "llvm/Support/CFG.h"
#include "llvm/Analysis/ConstantFolding.h"
#include "llvm/Transforms/Utils/Local.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/Transforms/Utils/Local.h"
#include <map>
using namespace llvm;
@ -362,8 +362,8 @@ void TailDup::eliminateUnconditionalBranch(BranchInst *Branch) {
Instruction *Inst = BI++;
if (isInstructionTriviallyDead(Inst))
Inst->eraseFromParent();
else if (Constant *C = ConstantFoldInstruction(Inst)) {
Inst->replaceAllUsesWith(C);
else if (Value *V = SimplifyInstruction(Inst)) {
Inst->replaceAllUsesWith(V);
Inst->eraseFromParent();
}
}

11
lib/Transforms/Utils/LoopUnroll.cpp
View File

@ -22,7 +22,7 @@
#include "llvm/Transforms/Utils/UnrollLoop.h"
#include "llvm/BasicBlock.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Analysis/ConstantFolding.h"
#include "llvm/Analysis/InstructionSimplify.h"
#include "llvm/Analysis/LoopPass.h"
#include "llvm/Analysis/ScalarEvolution.h"
#include "llvm/Support/Debug.h"
@ -361,10 +361,11 @@ bool llvm::UnrollLoop(Loop *L, unsigned Count, LoopInfo* LI, LPPassManager* LPM)
if (isInstructionTriviallyDead(Inst))
(*BB)->getInstList().erase(Inst);
else if (Constant *C = ConstantFoldInstruction(Inst)) {
Inst->replaceAllUsesWith(C);
(*BB)->getInstList().erase(Inst);
}
else if (Value *V = SimplifyInstruction(Inst))
if (LI->replacementPreservesLCSSAForm(Inst, V)) {
Inst->replaceAllUsesWith(V);
(*BB)->getInstList().erase(Inst);
}
}
NumCompletelyUnrolled += CompletelyUnroll;