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| author | Evan Cheng <evan.cheng@apple.com> | 2011-05-22 18:25:30 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2011-05-22 18:25:30 +0000 |
| commit | cb559c1270a773de2c97c99700dcd5456f24a732 (patch) | |
| tree | fad3556b5d6c6c1595c2c0ef1ee942e565bfb355 /lib/Analysis/ValueTracking.cpp | |
| parent | 1add46ddfa38f23669cb02de342fdb59a8709245 (diff) | |
Teach ValueTracking about x86 crc32 intrinsics.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131861 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Analysis/ValueTracking.cpp')
| -rw-r--r-- | lib/Analysis/ValueTracking.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/Analysis/ValueTracking.cpp b/lib/Analysis/ValueTracking.cpp index 8f18dd278a..7b7e39f6c4 100644 --- a/lib/Analysis/ValueTracking.cpp +++ b/lib/Analysis/ValueTracking.cpp @@ -670,6 +670,10 @@ void llvm::ComputeMaskedBits(Value *V, const APInt &Mask, KnownZero = APInt::getHighBitsSet(BitWidth, BitWidth - LowBits); break; } + case Intrinsic::x86_sse42_crc64_8: + case Intrinsic::x86_sse42_crc64_64: + KnownZero = APInt::getHighBitsSet(64, 32); + break; } } break; |