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, 21 insertions, 16 deletions

diff --git a/gcc/expr.c b/gcc/expr.c
index 444a3a7..281a714 100644
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -2238,7 +2238,7 @@ emit_group_load_1 (rtx *tmps, rtx dst, rtx orig_src, tree type,
       else if (VECTOR_MODE_P (GET_MODE (dst))
 	       && REG_P (src))
 	{
-	  int slen = GET_MODE_SIZE (GET_MODE (src));
+	  poly_uint64 slen = GET_MODE_SIZE (GET_MODE (src));
 	  rtx mem;
 
 	  mem = assign_stack_temp (GET_MODE (src), slen);
@@ -2970,7 +2970,7 @@ clear_storage_hints (rtx object, rtx size, enum block_op_methods method,
      just move a zero.  Otherwise, do this a piece at a time.  */
   if (mode != BLKmode
       && CONST_INT_P (size)
-      && INTVAL (size) == (HOST_WIDE_INT) GET_MODE_SIZE (mode))
+      && known_eq (INTVAL (size), GET_MODE_SIZE (mode)))
     {
       rtx zero = CONST0_RTX (mode);
       if (zero != NULL)
@@ -3508,7 +3508,7 @@ emit_move_complex (machine_mode mode, rtx x, rtx y)
 	 existing block move logic.  */
       if (MEM_P (x) && MEM_P (y))
 	{
-	  emit_block_move (x, y, GEN_INT (GET_MODE_SIZE (mode)),
+	  emit_block_move (x, y, gen_int_mode (GET_MODE_SIZE (mode), Pmode),
 			   BLOCK_OP_NO_LIBCALL);
 	  return get_last_insn ();
 	}
@@ -3573,9 +3573,12 @@ emit_move_multi_word (machine_mode mode, rtx x, rtx y)
   rtx_insn *seq;
   rtx inner;
   bool need_clobber;
-  int i;
+  int i, mode_size;
 
-  gcc_assert (GET_MODE_SIZE (mode) >= UNITS_PER_WORD);
+  /* This function can only handle cases where the number of words is
+     known at compile time.  */
+  mode_size = GET_MODE_SIZE (mode).to_constant ();
+  gcc_assert (mode_size >= UNITS_PER_WORD);
 
   /* If X is a push on the stack, do the push now and replace
      X with a reference to the stack pointer.  */
@@ -3594,9 +3597,7 @@ emit_move_multi_word (machine_mode mode, rtx x, rtx y)
   start_sequence ();
 
   need_clobber = false;
-  for (i = 0;
-       i < (GET_MODE_SIZE (mode) + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD;
-       i++)
+  for (i = 0; i < CEIL (mode_size, UNITS_PER_WORD); i++)
     {
       rtx xpart = operand_subword (x, i, 1, mode);
       rtx ypart;
@@ -4337,7 +4338,7 @@ emit_push_insn (rtx x, machine_mode mode, tree type, rtx size,
 	  /* A value is to be stored in an insufficiently aligned
 	     stack slot; copy via a suitably aligned slot if
 	     necessary.  */
-	  size = GEN_INT (GET_MODE_SIZE (mode));
+	  size = gen_int_mode (GET_MODE_SIZE (mode), Pmode);
 	  if (!MEM_P (xinner))
 	    {
 	      temp = assign_temp (type, 1, 1);
@@ -4493,9 +4494,10 @@ emit_push_insn (rtx x, machine_mode mode, tree type, rtx size,
     }
   else if (partial > 0)
     {
-      /* Scalar partly in registers.  */
-
-      int size = GET_MODE_SIZE (mode) / UNITS_PER_WORD;
+      /* Scalar partly in registers.  This case is only supported
+	 for fixed-wdth modes.  */
+      int size = GET_MODE_SIZE (mode).to_constant ();
+      size /= UNITS_PER_WORD;
       int i;
       int not_stack;
       /* # bytes of start of argument
@@ -11158,10 +11160,13 @@ expand_expr_real_1 (tree exp, rtx target, machine_mode tmode,
 		  gcc_assert (!TREE_ADDRESSABLE (exp));
 
 		  if (GET_MODE (op0) == BLKmode)
-		    emit_block_move (new_with_op0_mode, op0,
-				     GEN_INT (GET_MODE_SIZE (mode)),
-				     (modifier == EXPAND_STACK_PARM
-				      ? BLOCK_OP_CALL_PARM : BLOCK_OP_NORMAL));
+		    {
+		      rtx size_rtx = gen_int_mode (mode_size, Pmode);
+		      emit_block_move (new_with_op0_mode, op0, size_rtx,
+				       (modifier == EXPAND_STACK_PARM
+					? BLOCK_OP_CALL_PARM
+					: BLOCK_OP_NORMAL));
+		    }
 		  else
 		    emit_move_insn (new_with_op0_mode, op0);