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Fix OptimizeShadowIV to set Changed. Change OptimizeLoopTermCond to set

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Changed directly instead of using a return value.

Rename FilterOutUndesirableDedicatedRegisters's Changed variable to
distinguish it from LSRInstance's Changed member.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104269 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2010-05-20 20:05:31 +00:00
parent f7ff37d674
commit c6519f916b
1 changed files with 7 additions and 8 deletions
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15
lib/Transforms/Scalar/LoopStrengthReduce.cpp
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@ -1263,7 +1263,7 @@ class LSRInstance {
void OptimizeShadowIV();
bool FindIVUserForCond(ICmpInst *Cond, IVStrideUse *&CondUse);
ICmpInst *OptimizeMax(ICmpInst *Cond, IVStrideUse* &CondUse);
bool OptimizeLoopTermCond();
void OptimizeLoopTermCond();
void CollectInterestingTypesAndFactors();
void CollectFixupsAndInitialFormulae();
@ -1458,6 +1458,7 @@ void LSRInstance::OptimizeShadowIV() {
/* Remove cast operation */
ShadowUse->replaceAllUsesWith(NewPH);
ShadowUse->eraseFromParent();
Changed = true;
break;
}
}
@ -1637,7 +1638,7 @@ ICmpInst *LSRInstance::OptimizeMax(ICmpInst *Cond, IVStrideUse* &CondUse) {
/// OptimizeLoopTermCond - Change loop terminating condition to use the
/// postinc iv when possible.
bool
void
LSRInstance::OptimizeLoopTermCond() {
SmallPtrSet<Instruction *, 4> PostIncs;
@ -1773,8 +1774,6 @@ LSRInstance::OptimizeLoopTermCond() {
else if (BB != IVIncInsertPos->getParent())
IVIncInsertPos = BB->getTerminator();
}
return Changed;
}
bool
@ -2702,7 +2701,7 @@ LSRInstance::GenerateAllReuseFormulae() {
/// by other uses, pick the best one and delete the others.
void LSRInstance::FilterOutUndesirableDedicatedRegisters() {
#ifndef NDEBUG
bool Changed = false;
bool ChangedFormulae = false;
#endif
// Collect the best formula for each unique set of shared registers. This
@ -2746,7 +2745,7 @@ void LSRInstance::FilterOutUndesirableDedicatedRegisters() {
" in favor of formula "; Best.print(dbgs());
dbgs() << '\n');
#ifndef NDEBUG
Changed = true;
ChangedFormulae = true;
#endif
LU.DeleteFormula(F);
--FIdx;
@ -2764,7 +2763,7 @@ void LSRInstance::FilterOutUndesirableDedicatedRegisters() {
BestFormulae.clear();
}
DEBUG(if (Changed) {
DEBUG(if (ChangedFormulae) {
dbgs() << "\n"
"After filtering out undesirable candidates:\n";
print_uses(dbgs());
@ -3508,7 +3507,7 @@ LSRInstance::LSRInstance(const TargetLowering *tli, Loop *l, Pass *P)
OptimizeShadowIV();
// Change loop terminating condition to use the postinc iv when possible.
Changed |= OptimizeLoopTermCond();
OptimizeLoopTermCond();
CollectInterestingTypesAndFactors();
CollectFixupsAndInitialFormulae();