[InstSimplify] Use m_SignBit instead of calling getSignBit and using m_Specific. NFCI
llvm-svn: 299121
diff --git a/llvm/lib/Analysis/InstructionSimplify.cpp b/llvm/lib/Analysis/InstructionSimplify.cpp
index dace55a..29c0d0a 100644
--- a/llvm/lib/Analysis/InstructionSimplify.cpp
+++ b/llvm/lib/Analysis/InstructionSimplify.cpp
@@ -565,10 +565,8 @@
// add nsw/nuw (xor Y, signbit), signbit --> Y
// The no-wrapping add guarantees that the top bit will be set by the add.
// Therefore, the xor must be clearing the already set sign bit of Y.
- Constant *SignBit =
- ConstantInt::get(Ty, APInt::getSignBit(Ty->getScalarSizeInBits()));
- if ((isNSW || isNUW) && match(Op1, m_Specific(SignBit)) &&
- match(Op0, m_Xor(m_Value(Y), m_Specific(SignBit))))
+ if ((isNSW || isNUW) && match(Op1, m_SignBit()) &&
+ match(Op0, m_Xor(m_Value(Y), m_SignBit())))
return Y;
/// i1 add -> xor.