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Update isLCSSAForm to handle PHI nodes specially for live-out detection. This 

is the same as the recent patch to LCSSA.cpp.

llvm-svn: 28773
This commit is contained in:
Owen Anderson 2006-06-13 20:45:22 +00:00
parent 7c69df968c
commit 7e428625c9
1 changed files with 6 additions and 1 deletions
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7
llvm/lib/Analysis/LoopInfo.cpp
View File

@ -487,7 +487,12 @@ bool Loop::isLCSSAForm() const {
for (Value::use_iterator UI = I->use_begin(), E = I->use_end(); UI != E;
++UI) {
BasicBlock *UserBB = cast<Instruction>(*UI)->getParent();
if (!isa<PHINode>(*UI) && !contains(UserBB)) {
if (PHINode* p = dyn_cast<PHINode>(*UI)) {
unsigned OperandNo = UI.getOperandNo();
UserBB = p->getIncomingBlock(OperandNo/2);
}
if (!contains(UserBB)) {
return false;
}
}