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ConstantFoldInstOperands can theoretically return null if it

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didn't fold anything.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97049 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2010-02-24 19:31:47 +00:00
parent 8f767d987f
commit e177c9a9bc
1 changed files with 3 additions and 2 deletions
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3
lib/Analysis/ScalarEvolution.cpp
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@ -4226,13 +4226,14 @@ const SCEV *ScalarEvolution::computeSCEVAtScope(const SCEV *V, const Loop *L) {
}
}
Constant *C;
Constant *C = 0;
if (const CmpInst *CI = dyn_cast<CmpInst>(I))
C = ConstantFoldCompareInstOperands(CI->getPredicate(),
Operands[0], Operands[1], TD);
else
C = ConstantFoldInstOperands(I->getOpcode(), I->getType(),
&Operands[0], Operands.size(), TD);
if (C)
return getSCEV(C);
}
}