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More minor code simplifications.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74395 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2009-06-27 21:23:40 +00:00
parent 9d59d9f849
commit cfb32203bc
1 changed files with 9 additions and 14 deletions
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23
lib/Transforms/Scalar/LoopRotation.cpp
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@ -352,10 +352,9 @@ bool LoopRotate::rotateLoop(Loop *Lp, LPPassManager &LPM) {
// Removing incoming branch from loop preheader to original header.
// Now original header is inside the loop.
for (BasicBlock::iterator I = OrigHeader->begin(), E = OrigHeader->end();
I != E; ++I)
if (PHINode *PN = dyn_cast<PHINode>(I))
PN->removeIncomingValue(OrigPreHeader);
for (BasicBlock::iterator I = OrigHeader->begin();
(PN = dyn_cast<PHINode>(I)); ++I)
PN->removeIncomingValue(OrigPreHeader);
// Make NewHeader as the new header for the loop.
L->moveToHeader(NewHeader);
@ -452,13 +451,10 @@ void LoopRotate::preserveCanonicalLoopForm(LPPassManager &LPM) {
"Unexpected original pre-header terminator");
OrigPH_BI->setSuccessor(1, NewPreHeader);
}
for (BasicBlock::iterator I = NewHeader->begin(), E = NewHeader->end();
I != E; ++I) {
PHINode *PN = dyn_cast<PHINode>(I);
if (!PN)
break;
PHINode *PN;
for (BasicBlock::iterator I = NewHeader->begin();
(PN = dyn_cast<PHINode>(I)); ++I) {
int index = PN->getBasicBlockIndex(OrigPreHeader);
assert(index != -1 && "Expected incoming value from Original PreHeader");
PN->setIncomingBlock(index, NewPreHeader);
@ -545,11 +541,10 @@ void LoopRotate::preserveCanonicalLoopForm(LPPassManager &LPM) {
BasicBlock *NExit = SplitEdge(L->getLoopLatch(), Exit, this);
// Preserve LCSSA.
BasicBlock::iterator I = Exit->begin(), E = Exit->end();
PHINode *PN = NULL;
for (; (PN = dyn_cast<PHINode>(I)); ++I) {
for (BasicBlock::iterator I = Exit->begin();
(PN = dyn_cast<PHINode>(I)); ++I) {
unsigned N = PN->getNumIncomingValues();
for (unsigned index = 0; index < N; ++index)
for (unsigned index = 0; index != N; ++index)
if (PN->getIncomingBlock(index) == NExit) {
PHINode *NewPN = PHINode::Create(PN->getType(), PN->getName(),
NExit->begin());