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Get even more accurate on the casting. 

llvm-svn: 32478
This commit is contained in:
Reid Spencer 2006-12-12 09:17:50 +00:00
parent 41cb269a2b
commit 1ac0ab0850
1 changed files with 5 additions and 8 deletions
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13
llvm/lib/Analysis/ScalarEvolution.cpp
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@ -1567,8 +1567,7 @@ SCEVHandle ScalarEvolutionsImpl::ComputeIterationCount(const Loop *L) {
ConstantInt *CompVal = RHSC->getValue();
const Type *RealTy = ExitCond->getOperand(0)->getType();
CompVal = dyn_cast<ConstantInt>(
ConstantExpr::getIntegerCast(CompVal, RealTy,
CompVal->getType()->isSigned()));
ConstantExpr::getBitCast(CompVal, RealTy));
if (CompVal) {
// Form the constant range.
ConstantRange CompRange(Cond, CompVal);
@ -1577,12 +1576,10 @@ SCEVHandle ScalarEvolutionsImpl::ComputeIterationCount(const Loop *L) {
// range.
if (CompRange.getLower()->getType()->isSigned()) {
const Type *NewTy = RHSC->getValue()->getType();
Constant *NewL =
ConstantExpr::getIntegerCast(CompRange.getLower(), NewTy,
CompRange.getLower()->getType()->isSigned());
Constant *NewU =
ConstantExpr::getIntegerCast(CompRange.getUpper(), NewTy,
CompRange.getUpper()->getType()->isSigned());
Constant *NewL = ConstantExpr::getBitCast(CompRange.getLower(),
NewTy);
Constant *NewU = ConstantExpr::getBitCast(CompRange.getUpper(),
NewTy);
CompRange = ConstantRange(NewL, NewU);
}