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Fix a minor bug which resulted in intermediate calculations
using wider types than are necessary. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110241 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -1896,7 +1896,7 @@ const SCEV *ScalarEvolution::getUDivExpr(const SCEV *LHS,
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// TODO: Generalize this to non-constants by using known-bits information.
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// TODO: Generalize this to non-constants by using known-bits information.
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const Type *Ty = LHS->getType();
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const Type *Ty = LHS->getType();
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unsigned LZ = RHSC->getValue()->getValue().countLeadingZeros();
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unsigned LZ = RHSC->getValue()->getValue().countLeadingZeros();
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unsigned MaxShiftAmt = getTypeSizeInBits(Ty) - LZ;
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unsigned MaxShiftAmt = getTypeSizeInBits(Ty) - LZ - 1;
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// For non-power-of-two values, effectively round the value up to the
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// For non-power-of-two values, effectively round the value up to the
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// nearest power of two.
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// nearest power of two.
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if (!RHSC->getValue()->getValue().isPowerOf2())
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if (!RHSC->getValue()->getValue().isPowerOf2())
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