re PR tree-optimization/91445 (After memset, logical && operator produces false resul...

2019-08-15  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/91445
	* gcc.dg/torture/pr91445.c: New testcase.

From-SVN: r274533

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index d076a7717408385b553fdd21240596854e7add58..a21600b4cc9628b16424c717ed3d6287da7de0a7 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2019-08-15  Richard Biener  <rguenther@suse.de>
+
+       PR tree-optimization/91445
+       * gcc.dg/torture/pr91445.c: New testcase.
+
 2019-08-15  Richard Biener  <rguenther@suse.de>
 
        * gcc.dg/pr80170.c: Adjust to use __SIZETYPE__.

diff --git a/gcc/testsuite/gcc.dg/torture/pr91445.c b/gcc/testsuite/gcc.dg/torture/pr91445.c
new file mode 100644 (file)
index 0000000..1d24d45
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/torture/pr91445.c
@@ -0,0 +1,22 @@
+/* { dg-do run } */
+
+struct S { _Bool x; };
+
+void
+foo (struct S *s)
+{
+  __builtin_memset (s, 0x11, sizeof (struct S));
+  s->x = 1;
+}
+
+int
+main ()
+{
+  struct S s;
+  foo (&s);
+  char c;
+  __builtin_memcpy (&c, &s.x, 1);
+  if (c != 1)
+    __builtin_abort ();
+  return 0;
+}