re PR tree-optimization/54629 (ICE (segfault) in index_in_loop_nest tree-data-ref.h:608)

2012-09-21  Jakub Jelinek  <jakub@redhat.com>

	PR tree-optimization/54629
	* tree-loop-distribution.c (classify_partition): Free loop nest only
	after freeing ddr.  Free ddr and loop nest also if successful.

From-SVN: r191611

gcc/ChangeLog

+2012-09-21  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/54629
+	* tree-loop-distribution.c (classify_partition): Free loop nest only
+	after freeing ddr.  Free ddr and loop nest also if successful.
+
 2012-09-21  Matthias Klose  <doko@ubuntu.com>
 
 	* config/arm/arm.c (arm_mangle_type): Don't warn anymore that 

gcc/tree-loop-distribution.c

@@ -1019,10 +1019,10 @@ classify_partition (loop_p loop, struct graph *rdg, partition_t partition)
       ddr = initialize_data_dependence_relation (single_load, single_store,
 						 loops);
       compute_affine_dependence (ddr, loop);
-      VEC_free (loop_p, heap, loops);
       if (DDR_ARE_DEPENDENT (ddr) == chrec_dont_know)
 	{
 	  free_dependence_relation (ddr);
+	  VEC_free (loop_p, heap, loops);
 	  return;
 	}
       if (DDR_ARE_DEPENDENT (ddr) != chrec_known)
@@ -1030,6 +1030,7 @@ classify_partition (loop_p loop, struct graph *rdg, partition_t partition)
 	  if (DDR_NUM_DIST_VECTS (ddr) == 0)
 	    {
 	      free_dependence_relation (ddr);
+	      VEC_free (loop_p, heap, loops);
 	      return;
 	    }
 	  lambda_vector dist_v;
@@ -1040,10 +1041,13 @@ classify_partition (loop_p loop, struct graph *rdg, partition_t partition)
 	      if (dist > 0 && !DDR_REVERSED_P (ddr))
 		{
 		  free_dependence_relation (ddr);
+		  VEC_free (loop_p, heap, loops);
 		  return;
 		}
 	    }
 	}
+      free_dependence_relation (ddr);
+      VEC_free (loop_p, heap, loops);
       partition->kind = PKIND_MEMCPY;
       partition->main_dr = single_store;
       partition->secondary_dr = single_load;