diff options
Diffstat (limited to 'llvm/lib/Analysis/ScalarEvolution.cpp')
| -rw-r--r-- | llvm/lib/Analysis/ScalarEvolution.cpp | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/llvm/lib/Analysis/ScalarEvolution.cpp b/llvm/lib/Analysis/ScalarEvolution.cpp index 483159bef98..d635afb0a29 100644 --- a/llvm/lib/Analysis/ScalarEvolution.cpp +++ b/llvm/lib/Analysis/ScalarEvolution.cpp @@ -5717,10 +5717,11 @@ ScalarEvolution::getRangeRef(const SCEV *S, if (SignHint == ScalarEvolution::HINT_RANGE_UNSIGNED) { // For a SCEVUnknown, ask ValueTracking. KnownBits Known = computeKnownBits(U->getValue(), DL, 0, &AC, nullptr, &DT); - if (Known.One != ~Known.Zero + 1) - ConservativeResult = - ConservativeResult.intersectWith( - ConstantRange(Known.One, ~Known.Zero + 1), RangeType); + // If Known does not result in full-set, intersect with it. + if (Known.getMinValue() != Known.getMaxValue() + 1) + ConservativeResult = ConservativeResult.intersectWith( + ConstantRange(Known.getMinValue(), Known.getMaxValue() + 1), + RangeType); } else { assert(SignHint == ScalarEvolution::HINT_RANGE_SIGNED && "generalize as needed!"); |
