re PR tree-optimization/58539 (ICE with segfault at -O3 with -g enabled on x86_64-linux-gnu)

2013-09-26  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/58539
	* tree-vect-loop.c (vect_create_epilog_for_reduction): Honor
	the fact that debug statements are not taking part in loop-closed
	SSA construction.

	* gcc.dg/torture/pr58539.c: New testcase.

From-SVN: r202942

gcc/ChangeLog

+2013-09-26  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/58539
+	* tree-vect-loop.c (vect_create_epilog_for_reduction): Honor
+	the fact that debug statements are not taking part in loop-closed
+	SSA construction.
+
 2013-09-26  Nick Clifton  <nickc@redhat.com>
 
 	* config/msp430/msp430.c (msp430_expand_epilogue): Fix compile

gcc/testsuite/ChangeLog

+2013-09-26  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/58539
+	* gcc.dg/torture/pr58539.c: New testcase.
+
 2013-09-25  Jeff Law  <law@redhat.com>
 
 	* gcc.dg/tree-ssa/ssa-dom-thread-3.c: Update expected output.

gcc/testsuite/gcc.dg/torture/pr58539.c

+/* { dg-do compile } */
+/* { dg-options "-g" } */
+
+int a, b;
+
+extern void baz (int);
+
+int foo (int p)
+{
+  return p ? p : 1;
+}
+
+void bar ()
+{
+  int *c = &a, *d = &a;
+  for (b = 0; b < 12; b++)
+    *d |= 1;
+  foo (*c);
+  baz (*c && 1);
+}

gcc/tree-vect-loop.c

@@ -4411,7 +4411,8 @@ vect_finalize_reduction:
          result.  (The reduction result is expected to have two immediate uses -
          one at the latch block, and one at the loop exit).  */
       FOR_EACH_IMM_USE_FAST (use_p, imm_iter, scalar_dest)
-        if (!flow_bb_inside_loop_p (loop, gimple_bb (USE_STMT (use_p))))
+        if (!flow_bb_inside_loop_p (loop, gimple_bb (USE_STMT (use_p)))
+	    && !is_gimple_debug (USE_STMT (use_p)))
           phis.safe_push (USE_STMT (use_p));
 
       /* While we expect to have found an exit_phi because of loop-closed-ssa
@@ -4541,7 +4542,10 @@ vect_finalize_reduction:
       FOR_EACH_IMM_USE_FAST (use_p, imm_iter, scalar_dest)
         {
           if (!flow_bb_inside_loop_p (loop, gimple_bb (USE_STMT (use_p))))
-            phis.safe_push (USE_STMT (use_p));
+	    {
+	      if (!is_gimple_debug (USE_STMT (use_p)))
+		phis.safe_push (USE_STMT (use_p));
+	    }
           else
             {
               if (double_reduc && gimple_code (USE_STMT (use_p)) == GIMPLE_PHI)
@@ -4551,7 +4555,8 @@ vect_finalize_reduction:
                   FOR_EACH_IMM_USE_FAST (phi_use_p, phi_imm_iter, phi_res)
                     {
                       if (!flow_bb_inside_loop_p (loop,
-                                             gimple_bb (USE_STMT (phi_use_p))))
+                                             gimple_bb (USE_STMT (phi_use_p)))
+			  && !is_gimple_debug (USE_STMT (phi_use_p)))
                         phis.safe_push (USE_STMT (phi_use_p));
                     }
                 }