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prepare for a change I'm about to make

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llvm-svn: 31248
This commit is contained in:
Chris Lattner 2006-10-28 00:59:20 +00:00
parent 0d69f553c9
commit 93414d06c4
1 changed files with 6 additions and 0 deletions
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6
lib/Transforms/Scalar/LoopStrengthReduce.cpp
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@ -379,6 +379,9 @@ static bool IVUseShouldUsePostIncValue(Instruction *User, Instruction *IV,
for (unsigned i = 0, e = PN->getNumIncomingValues(); i != e; ++i)
if (PN->getIncomingValue(i) == IV) {
SplitCriticalEdge(PN->getIncomingBlock(i), PN->getParent(), P);
// Splitting the critical edge can reduce the number of entries in this
// PHI.
e = PN->getNumIncomingValues();
if (--NumUses == 0) break;
}
@ -589,6 +592,9 @@ void BasedUser::RewriteInstructionToUseNewBase(const SCEVHandle &NewBase,
BasicBlock *NewBB = PN->getIncomingBlock(i);
NewBB->moveBefore(PN->getParent());
}
// Splitting the edge can reduce the number of PHI entries we have.
e = PN->getNumIncomingValues();
}
Value *&Code = InsertedCode[PN->getIncomingBlock(i)];