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| author | Dan Gohman <gohman@apple.com> | 2009-05-01 16:44:18 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2009-05-01 16:44:18 +0000 |
| commit | 10b9479f555b27521062d1303ed43e11b69f7873 (patch) | |
| tree | c81df0e116412ffbc2020ba608e15f61b50ebc06 /lib/Analysis/ScalarEvolution.cpp | |
| parent | fbccdef1064dabe3b50e69646cbdddddbc8e7db2 (diff) | |
When creating cast scevs, canonicalize the destination type. This
avoids duplicate scevs that differ only in type.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70549 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Analysis/ScalarEvolution.cpp')
| -rw-r--r-- | lib/Analysis/ScalarEvolution.cpp | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp index 3e2b7354a8..ae3eb48bf5 100644 --- a/lib/Analysis/ScalarEvolution.cpp +++ b/lib/Analysis/ScalarEvolution.cpp @@ -649,6 +649,9 @@ SCEVHandle SCEVAddRecExpr::evaluateAtIteration(SCEVHandle It, SCEVHandle ScalarEvolution::getTruncateExpr(const SCEVHandle &Op, const Type *Ty) { assert(getTypeSizeInBits(Op->getType()) > getTypeSizeInBits(Ty) && "This is not a truncating conversion!"); + assert(isSCEVable(Ty) && + "This is not a conversion to a SCEVable type!"); + Ty = getEffectiveSCEVType(Ty); if (SCEVConstant *SC = dyn_cast<SCEVConstant>(Op)) return getUnknown( @@ -689,6 +692,9 @@ SCEVHandle ScalarEvolution::getZeroExtendExpr(const SCEVHandle &Op, const Type *Ty) { assert(getTypeSizeInBits(Op->getType()) < getTypeSizeInBits(Ty) && "This is not an extending conversion!"); + assert(isSCEVable(Ty) && + "This is not a conversion to a SCEVable type!"); + Ty = getEffectiveSCEVType(Ty); if (SCEVConstant *SC = dyn_cast<SCEVConstant>(Op)) { const Type *IntTy = getEffectiveSCEVType(Ty); @@ -771,6 +777,9 @@ SCEVHandle ScalarEvolution::getSignExtendExpr(const SCEVHandle &Op, const Type *Ty) { assert(getTypeSizeInBits(Op->getType()) < getTypeSizeInBits(Ty) && "This is not an extending conversion!"); + assert(isSCEVable(Ty) && + "This is not a conversion to a SCEVable type!"); + Ty = getEffectiveSCEVType(Ty); if (SCEVConstant *SC = dyn_cast<SCEVConstant>(Op)) { const Type *IntTy = getEffectiveSCEVType(Ty); |