[19/77] Add a smallest_int_mode_for_size helper function

This patch adds a wrapper around smallest_mode_for_size
for cases in which the mode class is MODE_INT.  Unlike
(int_)mode_for_size, smallest_mode_for_size always returns
a mode of the specified class, asserting if no such mode exists.
smallest_int_mode_for_size therefore returns a scalar_int_mode
rather than an opt_scalar_int_mode.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/
	* machmode.h (smallest_mode_for_size): Fix formatting.
	(smallest_int_mode_for_size): New function.
	* cfgexpand.c (expand_debug_expr): Use smallest_int_mode_for_size
	instead of smallest_mode_for_size.
	* combine.c (make_extraction): Likewise.
	* config/arc/arc.c (arc_expand_movmem): Likewise.
	* config/arm/arm.c (arm_expand_divmod_libfunc): Likewise.
	* config/i386/i386.c (ix86_get_mask_mode): Likewise.
	* config/s390/s390.c (s390_expand_insv): Likewise.
	* config/sparc/sparc.c (assign_int_registers): Likewise.
	* config/spu/spu.c (spu_function_value): Likewise.
	(spu_function_arg): Likewise.
	* coverage.c (get_gcov_type): Likewise.
	(get_gcov_unsigned_t): Likewise.
	* dse.c (find_shift_sequence): Likewise.
	* expmed.c (store_bit_field_1): Likewise.
	* expr.c (convert_move): Likewise.
	(store_field): Likewise.
	* internal-fn.c (expand_arith_overflow): Likewise.
	* optabs-query.c (get_best_extraction_insn): Likewise.
	* optabs.c (expand_twoval_binop_libfunc): Likewise.
	* stor-layout.c (layout_type): Likewise.
	(initialize_sizetypes): Likewise.
	* targhooks.c (default_get_mask_mode): Likewise.
	* tree-ssa-loop-manip.c (canonicalize_loop_ivs): Likewise.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>

From-SVN: r251471

1 files changed, 7 insertions, 7 deletions

diff --git a/gcc/expr.c b/gcc/expr.c
index b9a0b06..776c719 100644
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -346,8 +346,8 @@ convert_move (rtx to, rtx from, int unsignedp)
      xImode for all MODE_PARTIAL_INT modes they use, but no others.  */
   if (GET_MODE_CLASS (to_mode) == MODE_PARTIAL_INT)
     {
-      machine_mode full_mode
-	= smallest_mode_for_size (GET_MODE_BITSIZE (to_mode), MODE_INT);
+      scalar_int_mode full_mode
+	= smallest_int_mode_for_size (GET_MODE_BITSIZE (to_mode));
 
       gcc_assert (convert_optab_handler (trunc_optab, to_mode, full_mode)
 		  != CODE_FOR_nothing);
@@ -361,8 +361,8 @@ convert_move (rtx to, rtx from, int unsignedp)
   if (GET_MODE_CLASS (from_mode) == MODE_PARTIAL_INT)
     {
       rtx new_from;
-      machine_mode full_mode
-	= smallest_mode_for_size (GET_MODE_BITSIZE (from_mode), MODE_INT);
+      scalar_int_mode full_mode
+	= smallest_int_mode_for_size (GET_MODE_BITSIZE (from_mode));
       convert_optab ctab = unsignedp ? zext_optab : sext_optab;
       enum insn_code icode;
 
@@ -6848,8 +6848,8 @@ store_field (rtx target, HOST_WIDE_INT bitsize, HOST_WIDE_INT bitpos,
       if (GET_CODE (temp) == PARALLEL)
 	{
 	  HOST_WIDE_INT size = int_size_in_bytes (TREE_TYPE (exp));
-	  machine_mode temp_mode
-	    = smallest_mode_for_size (size * BITS_PER_UNIT, MODE_INT);
+	  scalar_int_mode temp_mode
+	    = smallest_int_mode_for_size (size * BITS_PER_UNIT);
 	  rtx temp_target = gen_reg_rtx (temp_mode);
 	  emit_group_store (temp_target, temp, TREE_TYPE (exp), size);
 	  temp = temp_target;
@@ -6920,7 +6920,7 @@ store_field (rtx target, HOST_WIDE_INT bitsize, HOST_WIDE_INT bitpos,
 	 word size, we need to load the value (see again store_bit_field).  */
       if (GET_MODE (temp) == BLKmode && bitsize <= BITS_PER_WORD)
 	{
-	  machine_mode temp_mode = smallest_mode_for_size (bitsize, MODE_INT);
+	  scalar_int_mode temp_mode = smallest_int_mode_for_size (bitsize);
 	  temp = extract_bit_field (temp, bitsize, 0, 1, NULL_RTX, temp_mode,
 				    temp_mode, false, NULL);
 	}