re PR middle-end/28683 (ICE (segfault in add_reg_br_prob_note) when comparing…

re PR middle-end/28683 (ICE (segfault in add_reg_br_prob_note) when comparing pointers with -O (and higher))

	PR middle-end/28683
	* cfgexpand.c (add_reg_br_prob_note): Check if last has exactly
	3 following insns.

	* gcc.c-torture/compile/20060823-1.c: New test.

From-SVN: r116467

gcc/ChangeLog

+2006-08-26  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/28683
+	* cfgexpand.c (add_reg_br_prob_note): Check if last has exactly
+	3 following insns.
+
 2006-08-25  Volker Reichelt  <reichelt@igpm.rwth-aachen.de>
 
 	* flow.c (verify_wide_reg): Use internal_error for consistency failure.

gcc/cfgexpand.c

@@ -58,7 +58,9 @@ add_reg_br_prob_note (rtx last, int probability)
 	if (!any_condjump_p (last)
 	    || !JUMP_P (NEXT_INSN (last))
 	    || !simplejump_p (NEXT_INSN (last))
+	    || !NEXT_INSN (NEXT_INSN (last))
 	    || !BARRIER_P (NEXT_INSN (NEXT_INSN (last)))
+	    || !NEXT_INSN (NEXT_INSN (NEXT_INSN (last)))
 	    || !LABEL_P (NEXT_INSN (NEXT_INSN (NEXT_INSN (last))))
 	    || NEXT_INSN (NEXT_INSN (NEXT_INSN (NEXT_INSN (last)))))
 	  goto failed;

gcc/testsuite/ChangeLog

+2006-08-26  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/28683
+	* gcc.c-torture/compile/20060823-1.c: New test.
+
 2006-08-25  Volker Reichelt  <reichelt@igpm.rwth-aachen.de>
 
 	PR c++/28853

gcc/testsuite/gcc.c-torture/compile/20060823-1.c

+/* PR middle-end/28683 */
+
+extern void foo (int *);
+
+struct A
+{
+  int f;
+};
+
+struct A *
+test (struct A *r)
+{
+  int *f = &r->f;
+  static int i = 0;
+  if (!i && !((void *) f == (void *) r))
+    foo (&i);
+  return r;
+}