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diff gcc/testsuite/gcc.dg/attr-may-alias-1.c @ 111:04ced10e8804

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gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/attr-may-alias-1.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,15 @@
+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+/* { dg-final { scan-assembler "dont_delete" } } */
+
+typedef struct { int x; } __attribute__((may_alias)) S;
+
+extern void dont_delete (void);
+
+void f(S *s, float *f)
+{
+  s->x = 1;
+  *f = 0;
+  if (s->x != 1)
+    dont_delete ();
+}