diff options
| author | Eli Friedman <eli.friedman@gmail.com> | 2012-03-05 23:09:40 +0000 |
|---|---|---|
| committer | Eli Friedman <eli.friedman@gmail.com> | 2012-03-05 23:09:40 +0000 |
| commit | 049d08f5c9e4f9f5c71d8f8d08d846ba15f2ae99 (patch) | |
| tree | d485f0f784f5e115de00b93339a29b8ff6495c4d /lib/Analysis | |
| parent | c3384c93c0e4c50da4ad093f08997507f9281c75 (diff) | |
Make sure we don't return bits outside the mask in ComputeMaskedBits. PR12189.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152066 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Analysis')
| -rw-r--r-- | lib/Analysis/ValueTracking.cpp | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/Analysis/ValueTracking.cpp b/lib/Analysis/ValueTracking.cpp index b5811f2e8a..b35e2074ac 100644 --- a/lib/Analysis/ValueTracking.cpp +++ b/lib/Analysis/ValueTracking.cpp @@ -691,8 +691,8 @@ void llvm::ComputeMaskedBits(Value *V, const APInt &Mask, if (P->hasConstantValue() == P) break; - KnownZero = APInt::getAllOnesValue(BitWidth); - KnownOne = APInt::getAllOnesValue(BitWidth); + KnownZero = Mask; + KnownOne = Mask; for (unsigned i = 0, e = P->getNumIncomingValues(); i != e; ++i) { // Skip direct self references. if (P->getIncomingValue(i) == P) continue; |