Adjust by-value function vec arguments to by-reference.

gcc/c/ChangeLog:

	* c-parser.c (c_parser_declaration_or_fndef): Adjust by-value function
	vec arguments to by-reference.
	(c_finish_omp_declare_simd): Same.
	(c_parser_compound_statement_nostart): Same.
	(c_parser_for_statement): Same.
	(c_parser_objc_methodprotolist): Same.
	(c_parser_oacc_routine): Same.
	(c_parser_omp_for_loop): Same.
	(c_parser_omp_declare_simd): Same.

gcc/ChangeLog:

	* dominance.c (prune_bbs_to_update_dominators): Adjust by-value vec
	arguments to by-reference.
	(iterate_fix_dominators): Same.
	* dominance.h (iterate_fix_dominators): Same.
	* ipa-prop.h: Call auto_vec::to_vec_legacy.
	* tree-data-ref.c (dump_data_dependence_relation): Adjust by-value vec
	arguments to by-reference.
	(debug_data_dependence_relation): Same.
	(dump_data_dependence_relations): Same.
	* tree-data-ref.h (debug_data_dependence_relation): Same.
	(dump_data_dependence_relations): Same.
	* tree-predcom.c (dump_chains): Same.
	(initialize_root_vars_lm): Same.
	(determine_unroll_factor): Same.
	(replace_phis_by_defined_names): Same.
	(insert_init_seqs): Same.
	(pcom_worker::tree_predictive_commoning_loop): Call
	 auto_vec::to_vec_legacy.
	* tree-ssa-pre.c (insert_into_preds_of_block): Adjust by-value vec
	arguments to by-reference.
	* tree-ssa-threadbackward.c (populate_worklist): Same.
	(back_threader::resolve_def): Same.
	* tree-vect-data-refs.c (vect_check_nonzero_value): Same.
	(vect_enhance_data_refs_alignment): Same.
	(vect_check_lower_bound): Same.
	(vect_prune_runtime_alias_test_list): Same.
	(vect_permute_store_chain): Same.
	* tree-vect-slp-patterns.c (vect_normalize_conj_loc): Same.
	* tree-vect-stmts.c (vect_create_vectorized_demotion_stmts): Same.
	* tree-vectorizer.h (vect_permute_store_chain): Same.
	* vec.c (test_init): New function.
	(vec_c_tests): Call new function.
	* vec.h (vec): Declare ctors, dtor, and assignment.
	(auto_vec::vec_to_legacy): New function.
	(vec::copy): Adjust initialization.

1 files changed, 8 insertions, 7 deletions

diff --git a/gcc/tree-vect-data-refs.c b/gcc/tree-vect-data-refs.c
index 17d24b4..d594c0a 100644
--- a/gcc/tree-vect-data-refs.c
+++ b/gcc/tree-vect-data-refs.c
@@ -212,7 +212,7 @@ vect_mark_for_runtime_alias_test (ddr_p ddr, loop_vec_info loop_vinfo)
 static void
 vect_check_nonzero_value (loop_vec_info loop_vinfo, tree value)
 {
-  vec<tree> checks = LOOP_VINFO_CHECK_NONZERO (loop_vinfo);
+  const vec<tree> &checks = LOOP_VINFO_CHECK_NONZERO (loop_vinfo);
   for (unsigned int i = 0; i < checks.length(); ++i)
     if (checks[i] == value)
       return;
@@ -2349,8 +2349,8 @@ vect_enhance_data_refs_alignment (loop_vec_info loop_vinfo)
 
   if (do_versioning)
     {
-      vec<stmt_vec_info> may_misalign_stmts
-        = LOOP_VINFO_MAY_MISALIGN_STMTS (loop_vinfo);
+      const vec<stmt_vec_info> &may_misalign_stmts
+	= LOOP_VINFO_MAY_MISALIGN_STMTS (loop_vinfo);
       stmt_vec_info stmt_info;
 
       /* It can now be assumed that the data references in the statements
@@ -3364,7 +3364,8 @@ static void
 vect_check_lower_bound (loop_vec_info loop_vinfo, tree expr, bool unsigned_p,
 			poly_uint64 min_value)
 {
-  vec<vec_lower_bound> lower_bounds = LOOP_VINFO_LOWER_BOUNDS (loop_vinfo);
+  vec<vec_lower_bound> &lower_bounds
+    = LOOP_VINFO_LOWER_BOUNDS (loop_vinfo);
   for (unsigned int i = 0; i < lower_bounds.length (); ++i)
     if (operand_equal_p (lower_bounds[i].expr, expr, 0))
       {
@@ -3466,10 +3467,10 @@ vect_prune_runtime_alias_test_list (loop_vec_info loop_vinfo)
   typedef pair_hash <tree_operand_hash, tree_operand_hash> tree_pair_hash;
   hash_set <tree_pair_hash> compared_objects;
 
-  vec<ddr_p> may_alias_ddrs = LOOP_VINFO_MAY_ALIAS_DDRS (loop_vinfo);
+  const vec<ddr_p> &may_alias_ddrs = LOOP_VINFO_MAY_ALIAS_DDRS (loop_vinfo);
   vec<dr_with_seg_len_pair_t> &comp_alias_ddrs
     = LOOP_VINFO_COMP_ALIAS_DDRS (loop_vinfo);
-  vec<vec_object_pair> &check_unequal_addrs
+  const vec<vec_object_pair> &check_unequal_addrs
     = LOOP_VINFO_CHECK_UNEQUAL_ADDRS (loop_vinfo);
   poly_uint64 vect_factor = LOOP_VINFO_VECT_FACTOR (loop_vinfo);
   tree scalar_loop_iters = LOOP_VINFO_NITERS (loop_vinfo);
@@ -5350,7 +5351,7 @@ vect_store_lanes_supported (tree vectype, unsigned HOST_WIDE_INT count,
    I4:  6 14 22 30  7 15 23 31.  */
 
 void
-vect_permute_store_chain (vec_info *vinfo, vec<tree> dr_chain,
+vect_permute_store_chain (vec_info *vinfo, vec<tree> &dr_chain,
 			  unsigned int length,
 			  stmt_vec_info stmt_info,
 			  gimple_stmt_iterator *gsi,