fix this method for 64-bit constants

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21158 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/llvm/CodeGen/SelectionDAGNodes.h b/include/llvm/CodeGen/SelectionDAGNodes.h
index 6d5d26223f09a0cecd2a418f53a6b48949121124..adb85f0e9637375294b6595c313518caa7702c03 100644 (file)
--- a/include/llvm/CodeGen/SelectionDAGNodes.h
+++ b/include/llvm/CodeGen/SelectionDAGNodes.h
@@ -605,7 +605,9 @@ public:
 
   bool isNullValue() const { return Value == 0; }
   bool isAllOnesValue() const {
-    return Value == (1ULL << MVT::getSizeInBits(getValueType(0)))-1;
+    int NumBits = MVT::getSizeInBits(getValueType(0));
+    if (NumBits == 64) return Value+1 == 0;
+    return Value == (1ULL << NumBits)-1;
   }
 
   static bool classof(const ConstantSDNode *) { return true; }