re PR middle-end/77718 (expand_builtin_memcmp swaps args)

	PR target/77718
	* builtins.c (expand_builtin_memcmp): Formatting fix.

	* gcc.c-torture/execute/pr77718.c: New test.

From-SVN: r242007

gcc/ChangeLog

 2016-11-09  Jakub Jelinek  <jakub@redhat.com>
 
+	PR target/77718
+	* builtins.c (expand_builtin_memcmp): Formatting fix.
+
 	* flag-types.h (enum sanitize_code): Add SANITIZE_SHIFT_BASE
 	and SANITIZE_SHIFT_EXPONENT, change SANITIZE_SHIFT to bitwise
 	or of them, renumber other enumerators.
@@ -5059,7 +5062,8 @@
 
 2016-09-29  Bernd Schmidt  <bschmidt@redhat.com>
 
-	* builtins.c (expand_builtin_memcmp): don't swap args unless
+	PR target/77718
+	* builtins.c (expand_builtin_memcmp): Don't swap args unless
 	result is only being compared with zero.
 
 2016-09-29  Marek Polacek  <polacek@redhat.com>

gcc/testsuite/ChangeLog

 2016-11-09  Jakub Jelinek  <jakub@redhat.com>
 
+	PR target/77718
+	* gcc.c-torture/execute/pr77718.c: New test.
+
 	* gcc.dg/ubsan/c99-shift-3.c: New test.
 	* gcc.dg/ubsan/c99-shift-4.c: New test.
 	* gcc.dg/ubsan/c99-shift-5.c: New test.

gcc/testsuite/gcc.c-torture/execute/pr77718.c

+/* PR middle-end/77718 */
+
+char a[64] __attribute__((aligned (8)));
+
+__attribute__((noinline, noclone)) int
+foo (void)
+{
+  return __builtin_memcmp ("bbbbbb", a, 6);
+}
+
+__attribute__((noinline, noclone)) int
+bar (void)
+{
+  return __builtin_memcmp (a, "bbbbbb", 6);
+}
+
+int
+main ()
+{
+  __builtin_memset (a, 'a', sizeof (a));
+  if (((foo () < 0) ^ ('a' > 'b'))
+      || ((bar () < 0) ^ ('a' < 'b')))
+    __builtin_abort ();
+  return 0;
+}