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Fix normalization and de-normalization of non-affine SCEVs.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105480 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2010-06-04 19:16:34 +00:00
parent 6de07178e1
commit c87b40b1cd
2 changed files with 32 additions and 6 deletions
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15
lib/Analysis/ScalarEvolutionNormalization.cpp
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@@ -105,22 +105,25 @@ const SCEV *llvm::TransformForPostIncUse(TransformKind Kind,
case NormalizeAutodetect:
if (Instruction *OI = dyn_cast<Instruction>(OperandValToReplace))
if (IVUseShouldUsePostIncValue(User, OI, L, &DT)) {
Result = SE.getMinusSCEV(Result, AR->getStepRecurrence(SE));
const SCEV *TransformedStep =
TransformForPostIncUse(Kind, AR->getStepRecurrence(SE),
User, OperandValToReplace, Loops, SE, DT);
Result = SE.getMinusSCEV(Result, TransformedStep);
Loops.insert(L);
}
break;
case Normalize:
if (Loops.count(L))
Result = SE.getMinusSCEV(Result, AR->getStepRecurrence(SE));
break;
case Denormalize:
if (Loops.count(L)) {
const SCEV *TransformedStep =
TransformForPostIncUse(Kind, AR->getStepRecurrence(SE),
User, OperandValToReplace, Loops, SE, DT);
Result = SE.getAddExpr(Result, TransformedStep);
Result = SE.getMinusSCEV(Result, TransformedStep);
}
break;
case Denormalize:
if (Loops.count(L))
Result = SE.getAddExpr(Result, AR->getStepRecurrence(SE));
break;
}
return Result;
}