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, 5 insertions, 6 deletions

diff --git a/gcc/tree.c b/gcc/tree.c
index e3a60fb..e696d03 100644
--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -1757,7 +1757,7 @@ build_vector_from_ctor (tree type, vec<constructor_elt, va_gc> *v)
   unsigned HOST_WIDE_INT idx;
   tree value;
 
-  auto_vec<tree, 32> vec (nelts);
+  tree_vector_builder vec (type, nelts, 1);
   FOR_EACH_CONSTRUCTOR_VALUE (v, idx, value)
     {
       if (TREE_CODE (value) == VECTOR_CST)
@@ -1769,7 +1769,7 @@ build_vector_from_ctor (tree type, vec<constructor_elt, va_gc> *v)
   while (vec.length () < nelts)
     vec.quick_push (build_zero_cst (TREE_TYPE (type)));
 
-  return build_vector (type, vec);
+  return vec.build ();
 }
 
 /* Build a vector of type VECTYPE where all the elements are SCs.  */
@@ -1792,10 +1792,9 @@ build_vector_from_val (tree vectype, tree sc)
 
   if (CONSTANT_CLASS_P (sc))
     {
-      auto_vec<tree, 32> v (nunits);
-      for (i = 0; i < nunits; ++i)
-	v.quick_push (sc);
-      return build_vector (vectype, v);
+      tree_vector_builder v (vectype, 1, 1);
+      v.quick_push (sc);
+      return v.build ();
     }
   else
     {