diff options
| author | Bill Wendling <isanbard@gmail.com> | 2012-04-30 17:09:46 +0000 |
|---|---|---|
| committer | Bill Wendling <isanbard@gmail.com> | 2012-04-30 17:09:46 +0000 |
| commit | 55f951325943a719478d625eb4271adb817fde7d (patch) | |
| tree | a8733273ac414c3efbd91d12f63d02d92a34c134 /lib | |
| parent | 8d1440d0217ab3b09a407c42f7559ad641c7077f (diff) | |
Merging r155818:
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r155818 | baldrick | 2012-04-30 04:56:58 -0700 (Mon, 30 Apr 2012) | 3 lines
Just mark the sign bit as known zero, rather than any other irrelevant bits
known zero in the LHS. Fixes PR12541.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_31@155827 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Analysis/ValueTracking.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/Analysis/ValueTracking.cpp b/lib/Analysis/ValueTracking.cpp index a430f6281e..1418e01d7c 100644 --- a/lib/Analysis/ValueTracking.cpp +++ b/lib/Analysis/ValueTracking.cpp @@ -564,7 +564,7 @@ void llvm::ComputeMaskedBits(Value *V, APInt &KnownZero, APInt &KnownOne, Depth+1); // If it's known zero, our sign bit is also zero. if (LHSKnownZero.isNegative()) - KnownZero |= LHSKnownZero; + KnownZero.setBit(BitWidth - 1); } break; |