[InstSimplify] Use APInt::isMask isntead of manually implementing it. NFC

llvm-svn: 303968

diff --git a/llvm/lib/Analysis/InstructionSimplify.cpp b/llvm/lib/Analysis/InstructionSimplify.cpp
index 34ca389..0a7b98b 100644 (file)
--- a/llvm/lib/Analysis/InstructionSimplify.cpp
+++ b/llvm/lib/Analysis/InstructionSimplify.cpp
@@ -1931,7 +1931,7 @@ static Value *SimplifyOrInst(Value *Op0, Value *Op1, const SimplifyQuery &Q,
       // .. and C2 = ~C1 and C2 is 0+1+ and (N & C2) == 0
       // replace with V+N.
       Value *V1, *V2;
-      if ((C2->getValue() & (C2->getValue() + 1)) == 0 && // C2 == 0+1+
+      if (C2->getValue().isMask() && // C2 == 0+1+
           match(A, m_Add(m_Value(V1), m_Value(V2)))) {
         // Add commutes, try both ways.
         if (V1 == B &&
@@ -1942,7 +1942,7 @@ static Value *SimplifyOrInst(Value *Op0, Value *Op1, const SimplifyQuery &Q,
           return A;
       }
       // Or commutes, try both ways.
-      if ((C1->getValue() & (C1->getValue() + 1)) == 0 &&
+      if (C1->getValue().isMask() &&
           match(B, m_Add(m_Value(V1), m_Value(V2)))) {
         // Add commutes, try both ways.
         if (V1 == A &&