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fix some cases where instcombine would change hte IR but not return true

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from runOnFunction


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80562 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2009-08-31 06:57:37 +00:00
parent f3a1c15b75
commit b0b822c449
1 changed files with 10 additions and 8 deletions
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18
lib/Transforms/Scalar/InstructionCombining.cpp
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@ -164,6 +164,7 @@ namespace {
public InstVisitor<InstCombiner, Instruction*> {
TargetData *TD;
bool MustPreserveLCSSA;
bool MadeIRChange;
public:
/// Worklist - All of the instructions that need to be simplified.
InstCombineWorklist Worklist;
@ -339,6 +340,7 @@ namespace {
}
Worklist.Remove(&I);
I.eraseFromParent();
MadeIRChange = true;
return 0; // Don't do anything with FI
}
@ -12676,7 +12678,7 @@ static void AddReachableCodeToWorklist(BasicBlock *BB,
}
bool InstCombiner::DoOneIteration(Function &F, unsigned Iteration) {
bool Changed = false;
MadeIRChange = false;
TD = getAnalysisIfAvailable<TargetData>();
DEBUG(errs() << "\n\nINSTCOMBINE ITERATION #" << Iteration << " on "
@ -12703,7 +12705,7 @@ bool InstCombiner::DoOneIteration(Function &F, unsigned Iteration) {
// going to do one without it.
if (!isa<DbgInfoIntrinsic>(I)) {
++NumDeadInst;
Changed = true;
MadeIRChange = true;
}
if (!I->use_empty())
I->replaceAllUsesWith(UndefValue::get(I->getType()));
@ -12721,7 +12723,7 @@ bool InstCombiner::DoOneIteration(Function &F, unsigned Iteration) {
DEBUG(errs() << "IC: DCE: " << *I << '\n');
EraseInstFromFunction(*I);
++NumDeadInst;
Changed = true;
MadeIRChange = true;
continue;
}
@ -12733,7 +12735,7 @@ bool InstCombiner::DoOneIteration(Function &F, unsigned Iteration) {
ReplaceInstUsesWith(*I, C);
++NumConstProp;
EraseInstFromFunction(*I);
Changed = true;
MadeIRChange = true;
continue;
}
@ -12745,7 +12747,7 @@ bool InstCombiner::DoOneIteration(Function &F, unsigned Iteration) {
F.getContext(), TD))
if (NewC != CE) {
i->set(NewC);
Changed = true;
MadeIRChange = true;
}
}
@ -12768,7 +12770,7 @@ bool InstCombiner::DoOneIteration(Function &F, unsigned Iteration) {
if (UserIsSuccessor && !isa<PHINode>(I->use_back()) &&
next(pred_begin(UserParent)) == pred_end(UserParent))
// Okay, the CFG is simple enough, try to sink this instruction.
Changed |= TryToSinkInstruction(I, UserParent);
MadeIRChange |= TryToSinkInstruction(I, UserParent);
}
}
@ -12823,12 +12825,12 @@ bool InstCombiner::DoOneIteration(Function &F, unsigned Iteration) {
Worklist.AddUsersToWorkList(*I);
}
}
Changed = true;
MadeIRChange = true;
}
}
Worklist.Zap();
return Changed;
return MadeIRChange;
}