Use tree_vector_builder instead of build_vector

This patch switches most build_vector calls over to tree_vector_builder,
using explicit encodings where appropriate.  Later patches handle
the remaining uses of build_vector.

2017-12-07  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/
	* config/sparc/sparc.c: Include tree-vector-builder.h.
	(sparc_fold_builtin): Use tree_vector_builder instead of build_vector.
	* expmed.c: Include tree-vector-builder.h.
	(make_tree): Use tree_vector_builder instead of build_vector.
	* fold-const.c: Include tree-vector-builder.h.
	(const_binop): Use tree_vector_builder instead of build_vector.
	(const_unop): Likewise.
	(native_interpret_vector): Likewise.
	(fold_vec_perm): Likewise.
	(fold_ternary_loc): Likewise.
	* gimple-fold.c: Include tree-vector-builder.h.
	(gimple_fold_stmt_to_constant_1): Use tree_vector_builder instead
	of build_vector.
	* tree-ssa-forwprop.c: Include tree-vector-builder.h.
	(simplify_vector_constructor): Use tree_vector_builder instead
	of build_vector.
	* tree-vect-generic.c: Include tree-vector-builder.h.
	(add_rshift): Use tree_vector_builder instead of build_vector.
	(expand_vector_divmod): Likewise.
	(optimize_vector_constructor): Likewise.
	* tree-vect-loop.c: Include tree-vector-builder.h.
	(vect_create_epilog_for_reduction): Use tree_vector_builder instead
	of build_vector.  Explicitly use a stepped encoding for
	{ 1, 2, 3, ... }.
	* tree-vect-slp.c: Include tree-vector-builder.h.
	(vect_get_constant_vectors): Use tree_vector_builder instead
	of build_vector.
	(vect_transform_slp_perm_load): Likewise.
	(vect_schedule_slp_instance): Likewise.
	* tree-vect-stmts.c: Include tree-vector-builder.h.
	(vectorizable_bswap): Use tree_vector_builder instead of build_vector.
	(vect_gen_perm_mask_any): Likewise.
	(vectorizable_call): Likewise.  Explicitly use a stepped encoding.
	* tree.c: (build_vector_from_ctor): Use tree_vector_builder instead
	of build_vector.
	(build_vector_from_val): Likewise.  Explicitly use a duplicate
	encoding.

From-SVN: r255475

1 files changed, 4 insertions, 3 deletions

diff --git a/gcc/tree-vect-loop.c b/gcc/tree-vect-loop.c
index 6a2de9a..566e2a6 100644
--- a/gcc/tree-vect-loop.c
+++ b/gcc/tree-vect-loop.c
@@ -51,6 +51,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "tree-cfg.h"
 #include "tree-if-conv.h"
 #include "internal-fn.h"
+#include "tree-vector-builder.h"
 
 /* Loop Vectorization Pass.
 
@@ -4507,10 +4508,10 @@ vect_create_epilog_for_reduction (vec<tree> vect_defs, gimple *stmt,
 	 vector size (STEP).  */
 
       /* Create a {1,2,3,...} vector.  */
-      auto_vec<tree, 32> vtemp (nunits_out);
-      for (k = 0; k < nunits_out; ++k)
+      tree_vector_builder vtemp (cr_index_vector_type, 1, 3);
+      for (k = 0; k < 3; ++k)
 	vtemp.quick_push (build_int_cst (cr_index_scalar_type, k + 1));
-      tree series_vect = build_vector (cr_index_vector_type, vtemp);
+      tree series_vect = vtemp.build ();
 
       /* Create a vector of the step value.  */
       tree step = build_int_cst (cr_index_scalar_type, nunits_out);