Replace some heap vectors with stack vectors.

From http://gcc.gnu.org/ml/gcc-patches/2013-10/msg02735.html

This patch is pretty dull, it just replaces a bunch of things of the
form
vec<T> x;
x.create (N); // N is a constant
blah blah
x.release ();
by
stack_vec<T, N> x;
blah blah

2013-11-01  Trevor Saunders  <tsaunders@mozilla.com>

gcc/
	* function.c (reorder_blocks): Convert block_stack to a stack_vec.
	* gimplify.c (gimplify_compound_lval): Likewise.
	* graphite-clast-to-gimple.c (gloog): Likewise.
	* graphite-dependences.c (loop_is_parallel_p): Likewise.
	* graphite-scop-detection.c (scopdet_basic_block_info): Likewise.
	(limit_scop); Likewise.
	(build_scops): Likewise.
	(dot_scop): Likewise.
	* graphite-sese-to-poly.c (sese_dom_walker): Likewise.
	(build_scop_drs): Likewise.
	(insert_stmts): Likewise.
	(insert_out_of_ssa_copy): Likewise.
	(remove_phi): Likewise.
	(rewrite_commutative_reductions_out_of_ssa_close_phi): Likewise.
	* hw-doloop.c (discover_loop): Likewise.
	* tree-call-cdce.c (shrink_wrap_one_built_in_call): Likewise.
	* tree-dfa.c (dump_enumerated_decls): Likewise.
	* tree-if-conv.c (if_convertable_loop_p): Likewise.
	* tree-inline.c (tree_function_versioning): Likewise.
	* tree-loop-distribution.c (build_rdg): Likewise.
	(rdg_flag_vertex_and_dependent): Likewise.
	(distribute_loop): Likewise.
	* tree-parloops.c (loop_parallel_p): Likewise.
	(eliminate_local_variables): Likewise.
	(separate_decls_in_region): Likewise.
	* tree-predcom.c (tree_predictive_commoning_loop): Likewise.
	* tree-ssa-phiopt.c (cond_if_else_store_replacement): Likewise.
	* tree-ssa-uncprop.c (uncprop_dom_walker): Likewise.
	* tree-vect-loop.c (vect_analyze_scaler_cycles_1): Likewise.
	* tree-vect-patterns.c (vect_pattern_recog): Likewise.
	* tree-vect-stmts.c (vect_mark_stmts_to_be_vectorized): Likewise.
	(vectorizable_condition): Likewise.

gcc/cp/
	* semantics.c (build_anon_member_initialization): Convert fields to be
        a stack_vec.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@204301 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 6 insertions, 14 deletions

diff --git a/gcc/graphite-scop-detection.c b/gcc/graphite-scop-detection.c
index 38fe92b44bb..e73a349803a 100644
--- a/gcc/graphite-scop-detection.c
+++ b/gcc/graphite-scop-detection.c
@@ -475,8 +475,7 @@ scopdet_basic_block_info (basic_block bb, loop_p outermost_loop,
 
     case GBB_LOOP_SING_EXIT_HEADER:
       {
-	vec<sd_region> regions;
-	regions.create (3);
+	stack_vec<sd_region, 3> regions;
 	struct scopdet_info sinfo;
 	edge exit_e = single_exit (loop);
 
@@ -541,8 +540,7 @@ scopdet_basic_block_info (basic_block bb, loop_p outermost_loop,
       {
         /* XXX: For now we just do not join loops with multiple exits.  If the
            exits lead to the same bb it may be possible to join the loop.  */
-        vec<sd_region> regions;
-	regions.create (3);
+        stack_vec<sd_region, 3> regions;
         vec<edge> exits = get_loop_exit_edges (loop);
         edge e;
         int i;
@@ -585,8 +583,7 @@ scopdet_basic_block_info (basic_block bb, loop_p outermost_loop,
       }
     case GBB_COND_HEADER:
       {
-	vec<sd_region> regions;
-	regions.create (3);
+	stack_vec<sd_region, 3> regions;
 	struct scopdet_info sinfo;
 	vec<basic_block> dominated;
 	int i;
@@ -1189,8 +1186,7 @@ print_graphite_statistics (FILE* file, vec<scop_p> scops)
 static void
 limit_scops (vec<scop_p> *scops)
 {
-  vec<sd_region> regions;
-  regions.create (3);
+  stack_vec<sd_region, 3> regions;
 
   int i;
   scop_p scop;
@@ -1225,7 +1221,6 @@ limit_scops (vec<scop_p> *scops)
 
   create_sese_edges (regions);
   build_graphite_scops (regions, scops);
-  regions.release ();
 }
 
 /* Returns true when P1 and P2 are close phis with the same
@@ -1404,8 +1399,7 @@ void
 build_scops (vec<scop_p> *scops)
 {
   struct loop *loop = current_loops->tree_root;
-  vec<sd_region> regions;
-  regions.create (3);
+  stack_vec<sd_region, 3> regions;
 
   canonicalize_loop_closed_ssa_form ();
   build_scops_1 (single_succ (ENTRY_BLOCK_PTR), ENTRY_BLOCK_PTR->loop_father,
@@ -1595,7 +1589,7 @@ dot_all_scops (vec<scop_p> scops)
 DEBUG_FUNCTION void
 dot_scop (scop_p scop)
 {
-  vec<scop_p> scops = vNULL;
+  stack_vec<scop_p, 1> scops;
 
   if (scop)
     scops.safe_push (scop);
@@ -1615,8 +1609,6 @@ dot_scop (scop_p scop)
 #else
   dot_all_scops_1 (stderr, scops);
 #endif
-
-  scops.release ();
 }
 
 #endif