re PR rtl-optimization/61772 (RTL if-conversion removes asm volatile goto)

        PR rtl-optimization/61772
        * ifcvt.c (dead_or_predicable): Check jump to be free of side
        effects.

testsuite/
        * gcc.dg/torture/pr61772.c: New test.

From-SVN: r212563

gcc/ChangeLog

+2014-07-15  Michael Matz  <matz@suse.de>
+
+	PR rtl-optimization/61772
+	* ifcvt.c (dead_or_predicable): Check jump to be free of side
+	effects.
+
 2014-07-15  Richard Biener  <rguenther@suse.de>
 
 	* opts.c (default_options_table): Disable bit-ccp at -Og.

gcc/ifcvt.c

@@ -4138,6 +4138,8 @@ dead_or_predicable (basic_block test_bb, basic_block merge_bb,
 
   if (JUMP_P (end))
     {
+      if (!onlyjump_p (end))
+	return FALSE;
       if (head == end)
 	{
 	  head = end = NULL_RTX;

gcc/testsuite/ChangeLog

+2014-07-15  Michael Matz  <matz@suse.de>
+
+	PR rtl-optimization/61772
+	* gcc.dg/torture/pr61772.c: New test.
+
 2014-07-15  Marek Polacek  <polacek@redhat.com>
 
 	* gcc.dg/ubsan/bounds-1.c: New test.

gcc/testsuite/gcc.dg/torture/pr61772.c

+/* { dg-do compile } */
+/* { dg-final { scan-assembler-times "XXX" 2 } } */
+
+static inline __attribute__((always_inline)) int dec_and_test (int *i)
+{
+    asm volatile goto ("XXX %0, %l[cc_label]"
+		       : : "m" (*i) : "memory" : cc_label);
+    return 0;
+cc_label:
+    return 1;
+}
+extern int getit (int *);
+int f (int *i, int cond)
+{
+  if (cond) {
+      getit (0);
+      if (dec_and_test (i))
+	getit (i);
+      return 42;
+  }
+  if (dec_and_test (i))
+    (void)1;
+  return getit (i);
+}