@@ -3830,6 +3830,8 @@ commutative_binary_fn_p (internal_fn fn)
case IFN_FMIN:
case IFN_FMAX:
case IFN_COMPLEX_MUL:
+ case IFN_UBSAN_CHECK_ADD:
+ case IFN_UBSAN_CHECK_MUL:
return true;
default:
new file mode 100644
@@ -0,0 +1,30 @@
+/* { dg-do compile } */
+/* { dg-options "-fsanitize=undefined -fdump-tree-optimized" } */
+/* { dg-skip-if "" { *-*-* } { "-O0" "-flto" } { "" } } */
+
+int res[2];
+
+void
+f1 (int x, int y)
+{
+ res[0] = x + y;
+ res[1] = y + x;
+}
+
+void
+f2 (int x, int y)
+{
+ res[0] = x - y;
+ res[1] = y - x;
+}
+
+void
+f3 (int x, int y)
+{
+ res[0] = x * y;
+ res[1] = y * x;
+}
+
+/* { dg-final { scan-tree-dump-times {\.UBSAN_CHECK_ADD} 1 "optimized" } } */
+/* { dg-final { scan-tree-dump-times {\.UBSAN_CHECK_SUB} 2 "optimized" } } */
+/* { dg-final { scan-tree-dump-times {\.UBSAN_CHECK_MUL} 1 "optimized" } } */