Add utility routines for creating integer negation operators with NSW set.

Integer negation only overflows with INT_MIN, but that's an important case.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91662 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 3 insertions, 0 deletions

diff --git a/include/llvm/Support/ConstantFolder.h b/include/llvm/Support/ConstantFolder.h
index b73cea04ab..eea33dfff6 100644
--- a/include/llvm/Support/ConstantFolder.h
+++ b/include/llvm/Support/ConstantFolder.h
@@ -109,6 +109,9 @@ public:
   Constant *CreateNeg(Constant *C) const {
     return ConstantExpr::getNeg(C);
   }
+  Constant *CreateNSWNeg(Constant *C) const {
+    return ConstantExpr::getNSWNeg(C);
+  }
   Constant *CreateFNeg(Constant *C) const {
     return ConstantExpr::getFNeg(C);
   }