[PATCH] Fix PR48270

[Richard Guenther]

Bootstrapped and tested on x86_64-unknonw-linux-gnu, applied.

Richard.

2011-03-24  Richard Guenther  <rguent...@suse.de>

        PR tree-optimization/48270
        * tree-ssa-phiopt.c (cond_if_else_store_replacement): Do
        not free datarefs before ddrs.

Index: gcc/tree-ssa-phiopt.c
===================================================================
--- gcc/tree-ssa-phiopt.c       (revision 171388)
+++ gcc/tree-ssa-phiopt.c       (working copy)
@@ -1494,8 +1494,6 @@ cond_if_else_store_replacement (basic_bl
   else_ddrs = VEC_alloc (ddr_p, heap, 1);
   compute_all_dependences (then_datarefs, &then_ddrs, NULL, false);
   compute_all_dependences (else_datarefs, &else_ddrs, NULL, false);
-  free_data_refs (then_datarefs);
-  free_data_refs (else_datarefs);
   blocks[0] = then_bb;
   blocks[1] = else_bb;
   blocks[2] = join_bb;
@@ -1517,6 +1515,8 @@ cond_if_else_store_replacement (basic_bl
         {
           free_dependence_relations (then_ddrs);
           free_dependence_relations (else_ddrs);
+         free_data_refs (then_datarefs);
+         free_data_refs (else_datarefs);
           VEC_free (gimple, heap, then_stores);
           VEC_free (gimple, heap, else_stores);
           return false;
@@ -1539,6 +1539,8 @@ cond_if_else_store_replacement (basic_bl
         {
           free_dependence_relations (then_ddrs);
           free_dependence_relations (else_ddrs);
+         free_data_refs (then_datarefs);
+         free_data_refs (else_datarefs);
           VEC_free (gimple, heap, then_stores);
           VEC_free (gimple, heap, else_stores);
           return false;
@@ -1556,6 +1558,8 @@ cond_if_else_store_replacement (basic_bl
 
   free_dependence_relations (then_ddrs);
   free_dependence_relations (else_ddrs);
+  free_data_refs (then_datarefs);
+  free_data_refs (else_datarefs);
   VEC_free (gimple, heap, then_stores);
   VEC_free (gimple, heap, else_stores);