PR9350: increment/decrement of char (and anything else narrower than int)
can't overflow due to promotion rules; emit a wrapping add for those cases.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@126816 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/integer-overflow.c b/test/CodeGen/integer-overflow.c
index 066ef89..1d46065 100644
--- a/test/CodeGen/integer-overflow.c
+++ b/test/CodeGen/integer-overflow.c
@@ -50,11 +50,17 @@
// TRAPV_HANDLER: foo(
--a;
-
// -fwrapv should turn off inbounds for GEP's, PR9256
extern int* P;
++P;
// DEFAULT: getelementptr inbounds i32*
// WRAPV: getelementptr i32*
// TRAPV: getelementptr inbounds i32*
+
+ // PR9350: char increment never overflows.
+ extern volatile signed char PR9350;
+ // DEFAULT: add i8 {{.*}}, 1
+ // WRAPV: add i8 {{.*}}, 1
+ // TRAPV: add i8 {{.*}}, 1
+ ++PR9350;
}