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-rw-r--r--lib/Analysis/ScalarEvolution.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp
index 1dc8e83b12..9aaafafe05 100644
--- a/lib/Analysis/ScalarEvolution.cpp
+++ b/lib/Analysis/ScalarEvolution.cpp
@@ -1896,7 +1896,7 @@ const SCEV *ScalarEvolution::getUDivExpr(const SCEV *LHS,
// TODO: Generalize this to non-constants by using known-bits information.
const Type *Ty = LHS->getType();
unsigned LZ = RHSC->getValue()->getValue().countLeadingZeros();
- unsigned MaxShiftAmt = getTypeSizeInBits(Ty) - LZ;
+ unsigned MaxShiftAmt = getTypeSizeInBits(Ty) - LZ - 1;
// For non-power-of-two values, effectively round the value up to the
// nearest power of two.
if (!RHSC->getValue()->getValue().isPowerOf2())