re PR middle-end/38492 ([graphite] segfaulting code when compiled with…

re PR middle-end/38492 ([graphite] segfaulting code when compiled with -fgraphite -fgraphite-identity)

2009-01-05  Sebastian Pop  <sebastian.pop@amd.com>

	PR tree-optimization/38492
	* graphite.c (rename_map_elt, debug_rename_elt,
        debug_rename_map_1, debug_rename_map, new_rename_map_elt,
        rename_map_elt_info, eq_rename_map_elts,
        get_new_name_from_old_name, bb_in_sese_p): Moved around.
	(sese_find_uses_to_rename_use): Renamed sese_build_livein_liveouts_use.
	(sese_find_uses_to_rename_bb): Renamed sese_build_livein_liveouts_bb.
	(sese_build_livein_liveouts): New.
	(new_sese, free_sese): New.
	(new_scop): Call new_sese.
	(free_scop): Call free_sese.
	(rename_variables_from_edge, rename_phis_end_scop): Removed.
	(register_old_new_names): Renamed register_old_and_new_names.
	(register_scop_liveout_renames, add_loop_exit_phis,
	insert_loop_close_phis, struct igp,
	default_liveout_before_guard, add_guard_exit_phis,
	insert_guard_phis, copy_renames): New.
	(translate_clast): Call insert_loop_close_phis and insert_guard_phis.
	(sese_add_exit_phis_edge): Renamed scop_add_exit_phis_edge.
	(rewrite_into_sese_closed_ssa): Renamed scop_insert_phis_for_liveouts.
	(scop_adjust_phis_for_liveouts): New.
	(gloog): Call scop_adjust_phis_for_liveouts.

	* graphite.h (struct sese): Documented.  Added fields liveout,
        num_ver and livein.
	(SESE_LIVEOUT, SESE_LIVEIN, SESE_LIVEIN_VER, SESE_NUM_VER): New.
	(new_sese, free_sese, sese_build_livein_liveouts): Declared.
	(struct scop): Added field liveout_renames.
	(SCOP_LIVEOUT_RENAMES): New.

From-SVN: r143097

gcc/ChangeLog

+2009-01-05  Sebastian Pop  <sebastian.pop@amd.com>
+
+	PR tree-optimization/38492
+	* graphite.c (rename_map_elt, debug_rename_elt,
+        debug_rename_map_1, debug_rename_map, new_rename_map_elt,
+        rename_map_elt_info, eq_rename_map_elts,
+        get_new_name_from_old_name, bb_in_sese_p): Moved around.
+	(sese_find_uses_to_rename_use): Renamed sese_build_livein_liveouts_use.
+	(sese_find_uses_to_rename_bb): Renamed sese_build_livein_liveouts_bb.
+	(sese_build_livein_liveouts): New.
+	(new_sese, free_sese): New.
+	(new_scop): Call new_sese.
+	(free_scop): Call free_sese.
+	(rename_variables_from_edge, rename_phis_end_scop): Removed.
+	(register_old_new_names): Renamed register_old_and_new_names.
+	(register_scop_liveout_renames, add_loop_exit_phis,
+	insert_loop_close_phis, struct igp,
+	default_liveout_before_guard, add_guard_exit_phis,
+	insert_guard_phis, copy_renames): New.
+	(translate_clast): Call insert_loop_close_phis and insert_guard_phis.
+	(sese_add_exit_phis_edge): Renamed scop_add_exit_phis_edge.
+	(rewrite_into_sese_closed_ssa): Renamed scop_insert_phis_for_liveouts.
+	(scop_adjust_phis_for_liveouts): New.
+	(gloog): Call scop_adjust_phis_for_liveouts.
+
+	* graphite.h (struct sese): Documented.  Added fields liveout,
+        num_ver and livein.
+	(SESE_LIVEOUT, SESE_LIVEIN, SESE_LIVEIN_VER, SESE_NUM_VER): New.
+	(new_sese, free_sese, sese_build_livein_liveouts): Declared.
+	(struct scop): Added field liveout_renames.
+	(SCOP_LIVEOUT_RENAMES): New.
+
 2009-01-05  Harsha Jagasia  <harsha.jagasia@amd.com>
 
 	PR tree-optimization/38510

gcc/graphite.h

@@ -275,13 +275,36 @@ DEF_VEC_ALLOC_P (name_tree, heap);
    by two edges.  */
 typedef struct sese
 {
+  /* Single ENTRY and single EXIT from the SESE region.  */
   edge entry, exit;
+
+  /* REGION_BASIC_BLOCKS contains the set of all the basic blocks
+     belonging to the SESE region.  */
   struct pointer_set_t *region_basic_blocks;
+
+  /* An SSA_NAME version is flagged in the LIVEOUT bitmap if the
+     SSA_NAME is defined inside and used outside the SESE region.  */
+  bitmap liveout;
+
+  /* The overall number of SSA_NAME versions used to index LIVEIN.  */
+  int num_ver;
+
+  /* For each SSA_NAME version VER in LIVEOUT, LIVEIN[VER] contains
+     the set of basic blocks indices that contain a use of VER.  */
+  bitmap *livein;
 } *sese;
 
 #define SESE_ENTRY(S) (S->entry)
 #define SESE_EXIT(S) (S->exit)
 #define SESE_REGION_BBS(S) (S->region_basic_blocks)
+#define SESE_LIVEOUT(S) (S->liveout)
+#define SESE_LIVEIN(S) (S->livein)
+#define SESE_LIVEIN_VER(S, I) (S->livein[I])
+#define SESE_NUM_VER(S) (S->num_ver)
+
+extern sese new_sese (edge, edge);
+extern void free_sese (sese);
+extern void sese_build_livein_liveouts (sese);
 
 /* A SCOP is a Static Control Part of the program, simple enough to be
    represented in polyhedral form.  */
@@ -319,6 +342,10 @@ struct scop
      can only add new params before generating the bb domains, otherwise they
      become invalid.  */
   bool add_params;
+
+  /* LIVEOUT_RENAMES registers the rename mapping that has to be
+     applied after code generation.  */
+  htab_t liveout_renames;
 };
 
 #define SCOP_BBS(S) S->bbs
@@ -341,6 +368,7 @@ struct scop
 #define SCOP_PROG(S) S->program
 #define SCOP_LOOP2CLOOG_LOOP(S) S->loop2cloog_loop
 #define SCOP_LOOPS_MAPPING(S) S->loops_mapping
+#define SCOP_LIVEOUT_RENAMES(S) S->liveout_renames
 
 extern void debug_scop (scop_p, int);
 extern void debug_scops (int);