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Get even more accurate on the casting.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32478 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Spencer
2006-12-12 09:17:50 +00:00
parent daa8e3c263
commit b6ba3e6d85
1 changed files with 5 additions and 8 deletions
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13
lib/Analysis/ScalarEvolution.cpp
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@ -1567,8 +1567,7 @@ SCEVHandle ScalarEvolutionsImpl::ComputeIterationCount(const Loop *L) {
ConstantInt *CompVal = RHSC->getValue(); ConstantInt *CompVal = RHSC->getValue();
const Type *RealTy = ExitCond->getOperand(0)->getType(); const Type *RealTy = ExitCond->getOperand(0)->getType();
CompVal = dyn_cast<ConstantInt>( CompVal = dyn_cast<ConstantInt>(
ConstantExpr::getIntegerCast(CompVal, RealTy, ConstantExpr::getBitCast(CompVal, RealTy));
CompVal->getType()->isSigned()));
if (CompVal) { if (CompVal) {
// Form the constant range. // Form the constant range.
ConstantRange CompRange(Cond, CompVal); ConstantRange CompRange(Cond, CompVal);
@ -1577,12 +1576,10 @@ SCEVHandle ScalarEvolutionsImpl::ComputeIterationCount(const Loop *L) {
// range. // range.
if (CompRange.getLower()->getType()->isSigned()) { if (CompRange.getLower()->getType()->isSigned()) {
const Type *NewTy = RHSC->getValue()->getType(); const Type *NewTy = RHSC->getValue()->getType();
Constant *NewL = Constant *NewL = ConstantExpr::getBitCast(CompRange.getLower(),
ConstantExpr::getIntegerCast(CompRange.getLower(), NewTy, NewTy);
CompRange.getLower()->getType()->isSigned()); Constant *NewU = ConstantExpr::getBitCast(CompRange.getUpper(),
Constant *NewU = NewTy);
ConstantExpr::getIntegerCast(CompRange.getUpper(), NewTy,
CompRange.getUpper()->getType()->isSigned());
CompRange = ConstantRange(NewL, NewU); CompRange = ConstantRange(NewL, NewU);
} }