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Add some comments about things that can go away once signless types are in.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32727 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Spencer 2006-12-21 06:43:46 +00:00
parent 1336a6bf06
commit 2e20d39493
1 changed files with 8 additions and 1 deletions
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9
lib/Analysis/ScalarEvolution.cpp
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@ -173,6 +173,8 @@ SCEVConstant::~SCEVConstant() {
SCEVHandle SCEVConstant::get(ConstantInt *V) {
// Make sure that SCEVConstant instances are all unsigned.
// FIXME:Signless. This entire if statement can be removed when integer types
// are signless. There won't be a need to bitcast then.
if (V->getType()->isSigned()) {
const Type *NewTy = V->getType()->getUnsignedVersion();
V = cast<ConstantInt>(
@ -459,7 +461,10 @@ SCEVHandle SCEVUnknown::getIntegerSCEV(int Val, const Type *Ty) {
C = Constant::getNullValue(Ty);
else if (Ty->isFloatingPoint())
C = ConstantFP::get(Ty, Val);
else if (Ty->isSigned())
/// FIXME:Signless. when integer types are signless, just change this to:
/// else
/// C = ConstantInt::get(Ty, Val);
else if (Ty->isSigned())
C = ConstantInt::get(Ty, Val);
else {
C = ConstantInt::get(Ty->getSignedVersion(), Val);
@ -1574,6 +1579,8 @@ SCEVHandle ScalarEvolutionsImpl::ComputeIterationCount(const Loop *L) {
// Now that we have it, if it's signed, convert it to an unsigned
// range.
// FIXME:Signless. This entire if statement can go away when
// integers are signless. ConstantRange is already signless.
if (CompRange.getLower()->getType()->isSigned()) {
const Type *NewTy = RHSC->getValue()->getType();
Constant *NewL = ConstantExpr::getBitCast(CompRange.getLower(),