re PR target/71554 (Miscompilation of __builtin_mul_overflow on i686)

	PR target/71554
	* gcc.c-torture/execute/pr71554.c: New test.

From-SVN: r237512

gcc/ChangeLog

@@ -4,6 +4,7 @@
 
 2016-06-16  Jakub Jelinek  <jakub@redhat.com>
 
+	PR target/71554
 	* config/i386/i386.md (setcc + movzbl peephole2): Use reg_set_p.
 	(setcc + and peephole2): Likewise.
 

gcc/testsuite/ChangeLog

 2016-06-16  Jakub Jelinek  <jakub@redhat.com>
 
+	PR target/71554
+	* gcc.c-torture/execute/pr71554.c: New test.
+
 	PR rtl-optimization/71532
 	* gcc.dg/torture/pr71532.c: New test.
 

gcc/testsuite/gcc.c-torture/execute/pr71554.c

+/* PR target/71554 */
+
+int v;
+
+__attribute__ ((noinline, noclone)) void
+bar (void)
+{
+  v++;
+}
+
+__attribute__ ((noinline, noclone))
+void
+foo (unsigned int x)
+{
+  signed int y = ((-__INT_MAX__ - 1) / 2);
+  signed int r;
+  if (__builtin_mul_overflow (x, y, &r))
+    bar ();
+}
+
+int
+main ()
+{
+  foo (2);
+  if (v)
+    __builtin_abort ();
+  return 0;
+}