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A loop may be unswitched multiple times. Reconstruct dom info. at the end. 

llvm-svn: 55806
This commit is contained in:
Devang Patel 2008-09-04 22:43:59 +00:00
parent 98982ef954
commit 40519f0370
1 changed files with 8 additions and 5 deletions
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13
llvm/lib/Transforms/Scalar/LoopUnswitch.cpp
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@ -190,6 +190,7 @@ bool LoopUnswitch::runOnLoop(Loop *L, LPPassManager &LPM_Ref) {
DF = getAnalysisToUpdate<DominanceFrontier>();
DT = getAnalysisToUpdate<DominatorTree>();
currentLoop = L;
Function *F = currentLoop->getHeader()->getParent();
bool Changed = false;
do {
assert(currentLoop->isLCSSAForm());
@ -197,6 +198,13 @@ bool LoopUnswitch::runOnLoop(Loop *L, LPPassManager &LPM_Ref) {
Changed |= processCurrentLoop();
} while(redoLoop);
if (Changed) {
// FIXME: Reconstruct dom info, because it is not preserved properly.
if (DT)
DT->runOnFunction(*F);
if (DF)
DF->runOnFunction(*F);
}
return Changed;
}
@ -450,11 +458,6 @@ bool LoopUnswitch::UnswitchIfProfitable(Value *LoopCond, Constant *Val){
UnswitchNontrivialCondition(LoopCond, Val, currentLoop);
}
// FIXME: Reconstruct dom info, because it is not preserved properly.
if (DT)
DT->runOnFunction(*F);
if (DF)
DF->runOnFunction(*F);
return true;
}