[17/77] Add an int_mode_for_size helper function

[Jeff Law]

On 07/13/2017 02:44 AM, Richard Sandiford wrote:
> This patch adds a wrapper around mode_for_size for cases in which
> the mode class is MODE_INT (the commonest case).  The return type
> can then be an opt_scalar_int_mode instead of a machine_mode.
> 
> 2017-07-13  Richard Sandiford  <richard.sandiford@linaro.org>
> 	    Alan Hayward  <alan.hayward@arm.com>
> 	    David Sherwood  <david.sherwood@arm.com>
> 
> gcc/
> 	* machmode.h (int_mode_for_size): New function.
> 	* builtins.c (set_builtin_user_assembler_name): Use int_mode_for_size
> 	instead of mode_for_size.
> 	* calls.c (save_fixed_argument_area): Likewise.  Make use of BLKmode
> 	explicit.
> 	* combine.c (expand_field_assignment): Use int_mode_for_size
> 	instead of mode_for_size.
> 	(make_extraction): Likewise.
> 	(simplify_shift_const_1): Likewise.
> 	(simplify_comparison): Likewise.
> 	* dojump.c (do_jump): Likewise.
> 	* dwarf2out.c (mem_loc_descriptor): Likewise.
> 	* emit-rtl.c (init_derived_machine_modes): Likewise.
> 	* expmed.c (flip_storage_order): Likewise.
> 	(convert_extracted_bit_field): Likewise.
> 	* expr.c (copy_blkmode_from_reg): Likewise.
> 	* graphite-isl-ast-to-gimple.c (max_mode_int_precision): Likewise.
> 	* internal-fn.c (expand_mul_overflow): Likewise.
> 	* lower-subreg.c (simple_move): Likewise.
> 	* optabs-libfuncs.c (init_optabs): Likewise.
> 	* simplify-rtx.c (simplify_unary_operation_1): Likewise.
> 	* stor-layout.c (vector_type_mode): Likewise.
> 	* tree-ssa-strlen.c (handle_builtin_memcmp): Likewise.
> 	* tree-vect-data-refs.c (vect_lanes_optab_supported_p): Likewise.
> 	* tree-vect-generic.c (expand_vector_parallel): Likewise.
> 	* tree-vect-stmts.c (vectorizable_load): Likewise.
> 
> gcc/ada/
> 	* gcc-interface/decl.c (gnat_to_gnu_entity): Use int_mode_for_size
> 	instead of mode_for_size.
> 	(gnat_to_gnu_subprog_type): Likewise.
> 	* gcc-interface/utils.c (make_type_from_size): Likewise.
OK.

Jeff