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Change break critical edges to not remove, then insert, PHI node entries.

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Instead, just update the BB in-place.  This is both faster, and it prevents
split-critical-edges from shuffling the PHI argument list unneccesarily.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22765 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-08-12 21:58:07 +00:00
parent 1f3e808ebf
commit b01bfd49c3
1 changed files with 2 additions and 2 deletions
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4
lib/Transforms/Utils/BreakCriticalEdges.cpp
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@ -124,8 +124,8 @@ bool llvm::SplitCriticalEdge(TerminatorInst *TI, unsigned SuccNum, Pass *P) {
// We no longer enter through TIBB, now we come in through NewBB. Revector
// exactly one entry in the PHI node that used to come from TIBB to come
// from NewBB.
Value *InVal = PN->removeIncomingValue(TIBB, false);
PN->addIncoming(InVal, NewBB);
int BBIdx = PN->getBasicBlockIndex(TIBB);
PN->setIncomingBlock(BBIdx, NewBB);
}
// If we don't have a pass object, we can't update anything...