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More cosmetic changes. 

llvm-svn: 35820
This commit is contained in:
Devang Patel 2007-04-09 16:21:29 +00:00
parent 88bc2c6f82
commit b28a391a8d
1 changed files with 18 additions and 14 deletions
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32
llvm/lib/Transforms/Scalar/LoopRotation.cpp
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@ -238,10 +238,12 @@ bool LoopRotate::rotateLoop(Loop *Lp, LPPassManager &LPM) {
for (SmallVector<RenameData, MAX_HEADER_SIZE>::iterator
I = LoopHeaderInfo.begin(), E = LoopHeaderInfo.end(); I != E; ++I) {
RenameData ILoopHeaderInfo = (*I);
const RenameData &ILoopHeaderInfo = *I;
Instruction *In = ILoopHeaderInfo.Original;
Instruction *C = ILoopHeaderInfo.PreHeader;
// If this instruction is not from new pre-header then is not new
// pre-header then this instruction is not handled here.
if (C->getParent() != NewPreHeader)
continue;
@ -249,7 +251,7 @@ bool LoopRotate::rotateLoop(Loop *Lp, LPPassManager &LPM) {
if (isa<PHINode>(In))
continue;
for (unsigned opi = 0; opi < In->getNumOperands(); ++opi) {
for (unsigned opi = 0, e = In->getNumOperands(); opi != e; ++opi) {
if (Instruction *OpPhi = dyn_cast<PHINode>(In->getOperand(opi))) {
if (RenameData *D = findReplacementData(OpPhi))
C->setOperand(opi, D->PreHeader);
@ -283,7 +285,7 @@ bool LoopRotate::rotateLoop(Loop *Lp, LPPassManager &LPM) {
for (SmallVector<RenameData, MAX_HEADER_SIZE>::iterator
I = LoopHeaderInfo.begin(), E = LoopHeaderInfo.end(); I != E; ++I) {
RenameData ILoopHeaderInfo = (*I);
const RenameData &ILoopHeaderInfo = *I;
if (!ILoopHeaderInfo.Header)
continue;
@ -294,7 +296,7 @@ bool LoopRotate::rotateLoop(Loop *Lp, LPPassManager &LPM) {
// not invalidated.
SmallVector<Instruction *, 16> AllUses;
for (Value::use_iterator UI = OldPhi->use_begin(), UE = OldPhi->use_end();
UI != UE; ++UI ) {
UI != UE; ++UI) {
Instruction *U = cast<Instruction>(UI);
AllUses.push_back(U);
}
@ -307,9 +309,10 @@ bool LoopRotate::rotateLoop(Loop *Lp, LPPassManager &LPM) {
// Used inside original header
if (Parent == OrigHeader) {
// Do not rename uses inside original header non-phi instructions.
if (!isa<PHINode>(U))
continue;
PHINode *PU = dyn_cast<PHINode>(U);
if (!PU)
continue;
// Do not rename uses inside original header phi nodes, if the
// incoming value is for new header.
if (PU->getBasicBlockIndex(NewHeader) != -1
@ -322,13 +325,14 @@ bool LoopRotate::rotateLoop(Loop *Lp, LPPassManager &LPM) {
// Used inside loop, but not in original header.
if (L->contains(U->getParent())) {
if (U != NewPhi )
if (U != NewPhi)
U->replaceUsesOfWith(OldPhi, NewPhi);
continue;
}
// Used inside Exit Block. Since we are in LCSSA form, U must be PHINode.
assert ( U->getParent() == Exit && "Need to propagate new PHI into Exit blocks");
assert (U->getParent() == Exit
&& "Need to propagate new PHI into Exit blocks");
assert (isa<PHINode>(U) && "Use in Exit Block that is not PHINode");
PHINode *UPhi = cast<PHINode>(U);
@ -374,10 +378,9 @@ void LoopRotate::updateExitBlock() {
for (BasicBlock::iterator I = Exit->begin(), E = Exit->end();
I != E; ++I) {
if (!isa<PHINode>(I))
break;
PHINode *PN = dyn_cast<PHINode>(I);
if (!PN)
break;
if (PN->getBasicBlockIndex(NewPreHeader) == -1) {
Value *V = PN->getIncomingValueForBlock(OrigHeader);
@ -405,7 +408,8 @@ void LoopRotate::initialize() {
LoopHeaderInfo.clear();
}
/// Return true if this instruction is used outside original header.
/// Return true if this instruction is used by any instructions in the loop that
/// aren't in original header.
bool LoopRotate::usedOutsideOriginalHeader(Instruction *In) {
for (Value::use_iterator UI = In->use_begin(), UE = In->use_end();
@ -427,7 +431,7 @@ RenameData *LoopRotate::findReplacementData(Instruction *In) {
// Since LoopHeaderInfo is small, linear walk is OK.
for (SmallVector<RenameData, MAX_HEADER_SIZE>::iterator
I = LoopHeaderInfo.begin(), E = LoopHeaderInfo.end(); I != E; ++I)
if ((*I).Original == In)
if (I->Original == In)
return &(*I);
return NULL;