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Dang, I've done that twice now! Undo previous commit.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34860 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Spencer 2007-03-02 23:37:53 +00:00
parent a5dae0cac0
commit 502db93a8a
1 changed files with 11 additions and 12 deletions
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23
lib/Transforms/Scalar/LoopStrengthReduce.cpp
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@ -540,7 +540,7 @@ Value *BasedUser::InsertCodeForBaseAtPosition(const SCEVHandle &NewBase,
// If there is no immediate value, skip the next part.
if (SCEVConstant *SC = dyn_cast<SCEVConstant>(Imm))
if (SC->getValue()->isZero())
if (SC->getValue()->isNullValue())
return Rewriter.expandCodeFor(NewBase, BaseInsertPt,
OperandValToReplace->getType());
@ -779,7 +779,7 @@ static void SeparateSubExprs(std::vector<SCEVHandle> &SubExprs,
SeparateSubExprs(SubExprs, SARE->getOperand(0));
}
} else if (!isa<SCEVConstant>(Expr) ||
!cast<SCEVConstant>(Expr)->getValue()->isZero()) {
!cast<SCEVConstant>(Expr)->getValue()->isNullValue()) {
// Do not add zero.
SubExprs.push_back(Expr);
}
@ -869,7 +869,7 @@ RemoveCommonExpressionsFromUseBases(std::vector<BasedUser> &Uses) {
///
static bool isZero(SCEVHandle &V) {
if (SCEVConstant *SC = dyn_cast<SCEVConstant>(V))
return SC->getValue()->isZero();
return SC->getValue()->getZExtValue() == 0;
return false;
}
@ -883,18 +883,17 @@ unsigned LoopStrengthReduce::CheckForIVReuse(const SCEVHandle &Stride,
if (!TLI) return 0;
if (SCEVConstant *SC = dyn_cast<SCEVConstant>(Stride)) {
APInt SInt(SC->getValue()->getValue());
if (SInt == 1)
return 0;
int64_t SInt = SC->getValue()->getSExtValue();
if (SInt == 1) return 0;
for (TargetLowering::legal_am_scale_iterator
I = TLI->legal_am_scale_begin(), E = TLI->legal_am_scale_end();
I != E; ++I) {
APInt Scale(SInt.getBitWidth(), *I);
if (SInt.abs().ult(Scale) || SInt.srem(Scale) != 0)
unsigned Scale = *I;
if (unsigned(abs(SInt)) < Scale || (SInt % Scale) != 0)
continue;
std::map<SCEVHandle, IVsOfOneStride>::iterator SI =
IVsByStride.find(SCEVUnknown::getIntegerSCEV(SInt.sdiv(Scale)));
IVsByStride.find(SCEVUnknown::getIntegerSCEV(SInt/Scale, UIntPtrTy));
if (SI == IVsByStride.end())
continue;
for (std::vector<IVExpr>::iterator II = SI->second.IVs.begin(),
@ -903,7 +902,7 @@ unsigned LoopStrengthReduce::CheckForIVReuse(const SCEVHandle &Stride,
// Only reuse previous IV if it would not require a type conversion.
if (isZero(II->Base) && II->Base->getType() == Ty) {
IV = *II;
return Scale.getZExtValue();
return Scale;
}
}
}
@ -1149,14 +1148,14 @@ void LoopStrengthReduce::StrengthReduceStridedIVUsers(const SCEVHandle &Stride,
// are reusing an IV, it has not been used to initialize the PHI node.
// Add it to the expression used to rewrite the uses.
if (!isa<ConstantInt>(CommonBaseV) ||
!cast<ConstantInt>(CommonBaseV)->isZero())
!cast<ConstantInt>(CommonBaseV)->isNullValue())
RewriteExpr = SCEVAddExpr::get(RewriteExpr,
SCEVUnknown::get(CommonBaseV));
}
// Now that we know what we need to do, insert code before User for the
// immediate and any loop-variant expressions.
if (!isa<ConstantInt>(BaseV) || !cast<ConstantInt>(BaseV)->isZero())
if (!isa<ConstantInt>(BaseV) || !cast<ConstantInt>(BaseV)->isNullValue())
// Add BaseV to the PHI value if needed.
RewriteExpr = SCEVAddExpr::get(RewriteExpr, SCEVUnknown::get(BaseV));