poly_int: GET_MODE_SIZE

This patch changes GET_MODE_SIZE from unsigned short to poly_uint16.
The non-mechanical parts were handled by previous patches.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/
	* machmode.h (mode_size): Change from unsigned short to
	poly_uint16_pod.
	(mode_to_bytes): Return a poly_uint16 rather than an unsigned short.
	(GET_MODE_SIZE): Return a constant if ONLY_FIXED_SIZE_MODES,
	or if measurement_type is not polynomial.
	(fixed_size_mode::includes_p): Check for constant-sized modes.
	* genmodes.c (emit_mode_size_inline): Make mode_size_inline
	return a poly_uint16 rather than an unsigned short.
	(emit_mode_size): Change the type of mode_size from unsigned short
	to poly_uint16_pod.  Use ZERO_COEFFS for the initializer.
	(emit_mode_adjustments): Cope with polynomial vector sizes.
	* lto-streamer-in.c (lto_input_mode_table): Use bp_unpack_poly_value
	for GET_MODE_SIZE.
	* lto-streamer-out.c (lto_write_mode_table): Use bp_pack_poly_value
	for GET_MODE_SIZE.
	* auto-inc-dec.c (try_merge): Treat GET_MODE_SIZE as polynomial.
	* builtins.c (expand_ifn_atomic_compare_exchange_into_call): Likewise.
	* caller-save.c (setup_save_areas): Likewise.
	(replace_reg_with_saved_mem): Likewise.
	* calls.c (emit_library_call_value_1): Likewise.
	* combine-stack-adj.c (combine_stack_adjustments_for_block): Likewise.
	* combine.c (simplify_set, make_extraction, simplify_shift_const_1)
	(gen_lowpart_for_combine): Likewise.
	* convert.c (convert_to_integer_1): Likewise.
	* cse.c (equiv_constant, cse_insn): Likewise.
	* cselib.c (autoinc_split, cselib_hash_rtx): Likewise.
	(cselib_subst_to_values): Likewise.
	* dce.c (word_dce_process_block): Likewise.
	* df-problems.c (df_word_lr_mark_ref): Likewise.
	* dwarf2cfi.c (init_one_dwarf_reg_size): Likewise.
	* dwarf2out.c (multiple_reg_loc_descriptor, mem_loc_descriptor)
	(concat_loc_descriptor, concatn_loc_descriptor, loc_descriptor)
	(rtl_for_decl_location): Likewise.
	* emit-rtl.c (gen_highpart, widen_memory_access): Likewise.
	* expmed.c (extract_bit_field_1, extract_integral_bit_field): Likewise.
	* expr.c (emit_group_load_1, clear_storage_hints): Likewise.
	(emit_move_complex, emit_move_multi_word, emit_push_insn): Likewise.
	(expand_expr_real_1): Likewise.
	* function.c (assign_parm_setup_block_p, assign_parm_setup_block)
	(pad_below): Likewise.
	* gimple-fold.c (optimize_atomic_compare_exchange_p): Likewise.
	* gimple-ssa-store-merging.c (rhs_valid_for_store_merging_p): Likewise.
	* ira.c (get_subreg_tracking_sizes): Likewise.
	* ira-build.c (ira_create_allocno_objects): Likewise.
	* ira-color.c (coalesced_pseudo_reg_slot_compare): Likewise.
	(ira_sort_regnos_for_alter_reg): Likewise.
	* ira-costs.c (record_operand_costs): Likewise.
	* lower-subreg.c (interesting_mode_p, simplify_gen_subreg_concatn)
	(resolve_simple_move): Likewise.
	* lra-constraints.c (get_reload_reg, operands_match_p): Likewise.
	(process_addr_reg, simplify_operand_subreg, curr_insn_transform)
	(lra_constraints): Likewise.
	(CONST_POOL_OK_P): Reject variable-sized modes.
	* lra-spills.c (slot, assign_mem_slot, pseudo_reg_slot_compare)
	(add_pseudo_to_slot, lra_spill): Likewise.
	* omp-low.c (omp_clause_aligned_alignment): Likewise.
	* optabs-query.c (get_best_extraction_insn): Likewise.
	* optabs-tree.c (expand_vec_cond_expr_p): Likewise.
	* optabs.c (expand_vec_perm_var, expand_vec_cond_expr): Likewise.
	(expand_mult_highpart, valid_multiword_target_p): Likewise.
	* recog.c (offsettable_address_addr_space_p): Likewise.
	* regcprop.c (maybe_mode_change): Likewise.
	* reginfo.c (choose_hard_reg_mode, record_subregs_of_mode): Likewise.
	* regrename.c (build_def_use): Likewise.
	* regstat.c (dump_reg_info): Likewise.
	* reload.c (complex_word_subreg_p, push_reload, find_dummy_reload)
	(find_reloads, find_reloads_subreg_address): Likewise.
	* reload1.c (eliminate_regs_1): Likewise.
	* rtlanal.c (for_each_inc_dec_find_inc_dec, rtx_cost): Likewise.
	* simplify-rtx.c (avoid_constant_pool_reference): Likewise.
	(simplify_binary_operation_1, simplify_subreg): Likewise.
	* targhooks.c (default_function_arg_padding): Likewise.
	(default_hard_regno_nregs, default_class_max_nregs): Likewise.
	* tree-cfg.c (verify_gimple_assign_binary): Likewise.
	(verify_gimple_assign_ternary): Likewise.
	* tree-inline.c (estimate_move_cost): Likewise.
	* tree-ssa-forwprop.c (simplify_vector_constructor): Likewise.
	* tree-ssa-loop-ivopts.c (add_autoinc_candidates): Likewise.
	(get_address_cost_ainc): Likewise.
	* tree-vect-data-refs.c (vect_enhance_data_refs_alignment): Likewise.
	(vect_supportable_dr_alignment): Likewise.
	* tree-vect-loop.c (vect_determine_vectorization_factor): Likewise.
	(vectorizable_reduction): Likewise.
	* tree-vect-stmts.c (vectorizable_assignment, vectorizable_shift)
	(vectorizable_operation, vectorizable_load): Likewise.
	* tree.c (build_same_sized_truth_vector_type): Likewise.
	* valtrack.c (cleanup_auto_inc_dec): Likewise.
	* var-tracking.c (emit_note_insn_var_location): Likewise.
	* config/arc/arc.h (ASM_OUTPUT_CASE_END): Use as_a <scalar_int_mode>.
	(ADDR_VEC_ALIGN): Likewise.

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

From-SVN: r256201

1 files changed, 10 insertions, 16 deletions

diff --git a/gcc/combine.c b/gcc/combine.c
index 19cdb2d..3a42de5 100644
--- a/gcc/combine.c
+++ b/gcc/combine.c
@@ -6931,10 +6931,10 @@ simplify_set (rtx x)
 
   if (GET_CODE (src) == SUBREG && subreg_lowpart_p (src)
       && !OBJECT_P (SUBREG_REG (src))
-      && (((GET_MODE_SIZE (GET_MODE (src)) + (UNITS_PER_WORD - 1))
-	   / UNITS_PER_WORD)
-	  == ((GET_MODE_SIZE (GET_MODE (SUBREG_REG (src)))
-	       + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD))
+      && (known_equal_after_align_up
+	  (GET_MODE_SIZE (GET_MODE (src)),
+	   GET_MODE_SIZE (GET_MODE (SUBREG_REG (src))),
+	   UNITS_PER_WORD))
       && (WORD_REGISTER_OPERATIONS || !paradoxical_subreg_p (src))
       && ! (REG_P (dest) && REGNO (dest) < FIRST_PSEUDO_REGISTER
 	    && !REG_CAN_CHANGE_MODE_P (REGNO (dest),
@@ -7773,7 +7773,7 @@ make_extraction (machine_mode mode, rtx inner, HOST_WIDE_INT pos,
       && ! mode_dependent_address_p (XEXP (inner, 0), MEM_ADDR_SPACE (inner))
       && ! MEM_VOLATILE_P (inner))
     {
-      int offset = 0;
+      poly_int64 offset = 0;
 
       /* The computations below will be correct if the machine is big
 	 endian in both bits and bytes or little endian in bits and bytes.
@@ -10469,8 +10469,6 @@ simplify_shift_const_1 (enum rtx_code code, machine_mode result_mode,
   machine_mode mode = result_mode;
   machine_mode shift_mode;
   scalar_int_mode tmode, inner_mode, int_mode, int_varop_mode, int_result_mode;
-  unsigned int mode_words
-    = (GET_MODE_SIZE (mode) + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD;
   /* We form (outer_op (code varop count) (outer_const)).  */
   enum rtx_code outer_op = UNKNOWN;
   HOST_WIDE_INT outer_const = 0;
@@ -10651,9 +10649,8 @@ simplify_shift_const_1 (enum rtx_code code, machine_mode result_mode,
 	  if (subreg_lowpart_p (varop)
 	      && is_int_mode (GET_MODE (SUBREG_REG (varop)), &inner_mode)
 	      && GET_MODE_SIZE (inner_mode) > GET_MODE_SIZE (int_varop_mode)
-	      && (unsigned int) ((GET_MODE_SIZE (inner_mode)
-				  + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD)
-		 == mode_words
+	      && (CEIL (GET_MODE_SIZE (inner_mode), UNITS_PER_WORD)
+		  == CEIL (GET_MODE_SIZE (int_mode), UNITS_PER_WORD))
 	      && GET_MODE_CLASS (int_varop_mode) == MODE_INT)
 	    {
 	      varop = SUBREG_REG (varop);
@@ -11625,8 +11622,6 @@ static rtx
 gen_lowpart_for_combine (machine_mode omode, rtx x)
 {
   machine_mode imode = GET_MODE (x);
-  unsigned int osize = GET_MODE_SIZE (omode);
-  unsigned int isize = GET_MODE_SIZE (imode);
   rtx result;
 
   if (omode == imode)
@@ -11634,8 +11629,9 @@ gen_lowpart_for_combine (machine_mode omode, rtx x)
 
   /* We can only support MODE being wider than a word if X is a
      constant integer or has a mode the same size.  */
-  if (GET_MODE_SIZE (omode) > UNITS_PER_WORD
-      && ! (CONST_SCALAR_INT_P (x) || isize == osize))
+  if (maybe_gt (GET_MODE_SIZE (omode), UNITS_PER_WORD)
+      && ! (CONST_SCALAR_INT_P (x)
+	    || known_eq (GET_MODE_SIZE (imode), GET_MODE_SIZE (omode))))
     goto fail;
 
   /* X might be a paradoxical (subreg (mem)).  In that case, gen_lowpart
@@ -11652,8 +11648,6 @@ gen_lowpart_for_combine (machine_mode omode, rtx x)
 
       if (imode == omode)
 	return x;
-
-      isize = GET_MODE_SIZE (imode);
     }
 
   result = gen_lowpart_common (omode, x);