Make isNegative() a const function since it doesn't modify the APInt.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34630 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/llvm/ADT/APInt.h b/include/llvm/ADT/APInt.h
index 489675d..a22ed82 100644 (file)
--- a/include/llvm/ADT/APInt.h
+++ b/include/llvm/ADT/APInt.h
@@ -355,7 +355,7 @@ public:
   /// This just tests the high bit of this APInt to determine if it is negative.
   /// @returns true if this APInt is negative, false otherwise
   /// @brief Determine sign of this APInt.
-  bool isNegative() {
+  bool isNegative() const {
     return (*this)[BitWidth - 1];
   }