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Cleanup: make std::pair usage slightly less indecipherable without actually naming variables!

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135684 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Trick 2011-07-21 17:37:39 +00:00
parent a50c175fe3
commit a305fe7545
1 changed files with 8 additions and 7 deletions
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15
lib/Transforms/Scalar/IndVarSimplify.cpp
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@ -1389,23 +1389,24 @@ void IndVarSimplify::SimplifyIVUsersNoRewrite(Loop *L, SCEVExpander &Rewriter) {
pushIVUsers(CurrIV, Simplified, SimpleIVUsers);
while (!SimpleIVUsers.empty()) {
std::pair<Instruction*, Instruction*> Use =SimpleIVUsers.pop_back_val();
std::pair<Instruction*, Instruction*> UseOper =
SimpleIVUsers.pop_back_val();
// Bypass back edges to avoid extra work.
if (Use.first == CurrIV) continue;
if (UseOper.first == CurrIV) continue;
if (EliminateIVUser(Use.first, Use.second)) {
pushIVUsers(Use.second, Simplified, SimpleIVUsers);
if (EliminateIVUser(UseOper.first, UseOper.second)) {
pushIVUsers(UseOper.second, Simplified, SimpleIVUsers);
continue;
}
if (CastInst *Cast = dyn_cast<CastInst>(Use.first)) {
if (CastInst *Cast = dyn_cast<CastInst>(UseOper.first)) {
bool IsSigned = Cast->getOpcode() == Instruction::SExt;
if (IsSigned || Cast->getOpcode() == Instruction::ZExt) {
CollectExtend(Cast, IsSigned, WI, SE, TD);
}
continue;
}
if (isSimpleIVUser(Use.first, L, SE)) {
pushIVUsers(Use.first, Simplified, SimpleIVUsers);
if (isSimpleIVUser(UseOper.first, L, SE)) {
pushIVUsers(UseOper.first, Simplified, SimpleIVUsers);
}
}
if (WI.WidestNativeType) {