* reload.c (find_reloads_subreg_address): Check the original
req_equiv_mem address to detect the case where an address is
not valid in the outer mode.
From-SVN: r150649
gcc/:
* combine.c (record_value_for_reg): Change 0 to VOIDmode, twice.
(record_dead_and_set_regs): Likewise.
* df.h (struct df_mw_hardreg): Change flags field to int.
(struct df_base_ref): Likewise.
(struct df): Change changeable_flags field to int.
* df-scan.c (df_defs_record): Change clobber_flags to int.
* dwarf2.h (enum dwarf_tag): Make lo_user and hi_user values enum
constants rather than #define macros.
(enum dwarf_attribute, enum dwarf_location_atom): Likewise.
(enum dwarf_type, enum dwarf_endianity_encoding): Likewise.
(enum dwarf_calling_convention): Likewise.
(enum dwarf_line_number_x_ops): Likewise.
(enum dwarf_call_frame_info): Likewise.
(enum dwarf_source_language): Likewise.
* dwarf2out.c (int_loc_descriptor): Add cast to enum type.
(add_calling_convention_attribute): Likewise.
* fold-const.c (fold_undefer_overflow_warnings): Add cast to enum
type.
(combine_comparisons): Change compcode to int. Add cast to enum
type.
* genrecog.c (maybe_both_true_2): Change c to int.
(write_switch): Likewise. Add cast to enum type.
* gimplify.c (gimplify_omp_for): Handle return values from
gimplify_expr using MIN rather than bitwise or.
(gimplify_expr): Add cast to enum type.
* ipa-prop.c (update_jump_functions_after_inlining): Change
IPA_BOTTOM to IPA_JF_UNKNOWN.
* ira.c (setup_class_subset_and_memory_move_costs): Change mode to
int. Add casts to enum type.
(setup_cover_and_important_classes): Change cl to int. Add casts
to enum type.
(setup_class_translate): Change cl and mode to int.
(ira_init_once): Change mode to int.
(free_register_move_costs): Likewise.
(setup_prohibited_mode_move_regs): Add casts to enum type.
* langhooks.c (add_builtin_function_common): Rework assertion that
value fits bitfield.
* mcf.c (add_fixup_edge): Change type parameter to edge_type.
* omega.c (omega_do_elimination): Avoid math on enum types.
* optabs.c (expand_vec_shift_expr): Remove casts to int.
* opts.c (set_debug_level): Change 2 to enum constant. Use new
int local to handle integral_argment value.
* regmove.c (try_auto_increment): Change PUT_MODE to
PUT_REG_NOTE_KIND.
* reload.c (push_secondary_reload): Add casts to enum type.
(secondary_reload_class, find_valid_class): Likewise.
* reload1.c (emit_input_reload_insns): Likewise.
* rtl.h (NOTE_VAR_LOCATION_STATUS): Likewise.
* sel-sched.c (init_hard_regs_data): Change cur_mode to int.
* sel-sched-ir.c (hash_with_unspec_callback): Change 0 to enum
constant.
* tree.c (build_common_builtin_nodes): Add casts to enum type.
* tree-complex.c (complex_lattice_t): Typedef to int rather than
enum type.
(expand_complex_libcall): Add casts to enum type.
* tree-into-ssa.c (get_ssa_name_ann): Change 0 to enum constant.
* tree-vect-loop.c (vect_model_reduction_cost): Compare reduc_code
with ERROR_MARK, not NUM_TREE_CODES.
(vect_create_epilog_for_reduction): Likewise.
(vectorizable_reduction): Don't initialize epiloc_reduc_code.
When not using it, set it to ERROR_MARK rather than
NUM_TREE_CODES.
* tree-vect-patterns.c (vect_pattern_recog_1): Change vec_mode to
enum machine_mode.
* tree-vect-stmts.c (new_stmt_vec_info): Change 0 to
vect_unused_in_loop. Change 0 to loop_vect.
* tree-vectorizer.c (vect_set_verbosity_level): Add casts to enum
type.
* var-tracking.c (get_init_value): Change return type to enum
var_init_status.
* vec.h (DEF_VEC_FUNC_P) [iterate]: Cast 0 to type T.
* config/arm/arm.c (fp_model_for_fpu): Change to array to enum
arm_fp_model.
(arm_override_options): Add casts to enum type.
(arm_emit_tls_decoration): Likewise.
* config/i386/i386.c (ix86_function_specific_restore): Add casts
to enum type.
* config/i386/i386-c.c (ix86_pragma_target_parse): Likewise.
* config/ia64/ia64.c (ia64_expand_compare): Change magic to int.
* config/rs6000/rs6000.c (rs6000_override_options): Add casts to
enum type.
* config/s390/s390.c (code_for_builtin_64): Change to array of
enum insn_code.
(code_for_builtin_31): Likewise.
(s390_expand_builtin): Change code_for_builtin to enum insn_code
const *.
* config/sparc/sparc.c (sparc_override_options): Change value
field in struct code_model to enum cmodel. In initializer change
0 to NULL and add cast to enum type.
* c-typeck.c (build_modify_expr): Add lhs_origtype parameter.
Change all callers. Issue a -Wc++-compat warning using
lhs_origtype if necessary.
(convert_for_assignment): Issue -Wc++-compat warnings about
invalid conversions to enum type on assignment.
* c-common.h (build_modify_expr): Update declaration.
gcc/cp/:
* call.c (build_temp): Change 0 to enum constant.
* cp-tree.h (cp_lvalue_kind): Typedef to int rather than enum
type.
* cp-gimplify.c (cp_gimplify_expr): Add cast to enum type.
* decl2.c (constrain_visibility): Likewise.
* parser.c (cp_lexer_get_preprocessor_token): Likewise.
(cp_parser_flags): Typedef to int rather than enum type.
(cp_parser_expression_stack_entry): Change prec field to enum
cp_parser_prec.
* typeck.c (build_modify_expr): Add lhs_origtype parameter.
Change all callers.
gcc/fortran/:
* gfortran.h (enum gfc_symbol_type): New named enum type, broken
out of struct gfc_symbol.
(struct gfc_symbol): Use enum gfc_symbol_type.
(enum gfc_array_ref_dimen_type): New named enum type, broken out
of struct gfc_array_ref).
(struct gfc_array_ref): Use enum gfc_array_ref_dimen_type.
(mod_pointee_as): Update declaration.
* decl.c (add_global_entry): Change type to enum gfc_symbol_type.
(gfc_mod_pointee_as): Change return type to "match".
* module.c (mio_array_ref): Add cast to enum type.
(mio_symbol): Likewise.
* resolve.c (resolve_global_procedure): Change type to enum
gfc_symbol_type.
* trans-io.c (gfc_build_st_parameter): Change type to unsigned
int.
gcc/java/:
* jcf-parse.c (handle_constant): Add cast to enum type.
gcc/objc/:
* objc-act.c (get_super_receiver): Update calls to
build_modify_expr to pass new argument.
gcc/testsuite/:
* gcc.dg/Wcxx-compat-4.c: New testcase.
From-SVN: r146735
gcc/:
Fix enum conversions which are invalid in C++:
* auto-inc-dec.c (attempt_change): Change 0 to SET in function
call.
* calls.c (store_one_arg): Change 0 to EXPAND_NORMAL in function
call.
* cse.c (hash_rtx_cb): Change 0 to VOIDmode in function call.
* dbgcnt.c (dbg_cnt_set_limit_by_name): Add cast to enum type.
* dbxout.c (dbxout_symbol): Change 0 to VOIDmode in function
call.
(dbxout_parms): Likewise.
* df-core.c (df_set_flags): Change changeable_flags parameter to
int.
(df_clear_flags): Likewise.
* df-problems.c (df_rd_bb_local_compute_process_def): Change
top_flag parameter to int.
(df_chain_create_bb_process_use): Likewise.
(df_chain_add_problem): Change chain_flags parameter to unsigned
int. Remove cast.
* df-scan.c (df_ref_create): Change ref_flags parameter to int.
(df_ref_create_structure, df_def_record_1): Likewise.
(df_defs_record, df_uses_record, df_get_call_refs): Likewise.
(df_notes_rescan): Change 0 to VOIDmode in function call.
(df_get_call_refs, df_insn_refs_collect): Likewise.
(df_bb_regs_collect): Likewise.
(df_entry_block_defs_collect): Likewise.
(df_exit_block_uses_collect): Likewise.
* df.h: Update declarations.
* double-int.c (double_int_divmod): Add cast to enum type.
* dse.c (replace_inc_dec): Reverse parameters to gen_int_mode.
* dwarf2out.c (new_reg_loc_descr): Add casts to enum type.
(based_loc_descr): Likewise.
(loc_descriptor_from_tree_1): Change first_op and second_op to
enum dwarf_location_atom. Add cast to enum type.
* expmed.c (init_expmed): Change 0 to SET in function call.
* expr.c (init_expr_target): Change 0 to VOIDmode in function
call.
(expand_expr_real_1): Change 0 to EXPAND_NORMAL in function call.
(do_store_flag): Likewise.
* fixed-value.h (struct fixed_value): Change mode to enum
machine_mode.
* function.c (assign_parms): Change 0 to VOIDmode in function
call.
* genautomata.c (insert_automaton_decl): Change 1 to INSERT in
function call.
(insert_insn_decl, insert_decl, insert_state): Likewise.
(automata_list_finish): Likewise.
* genrecog.c (process_define_predicate): Add cast to enum type.
* gensupport.c (init_predicate_table): Add cast to enum type.
* gimple.c (gimple_build_return): Change 0 to ERROR_MARK in
function call.
(gimple_build_call_1, gimple_build_label): Likewise.
(gimple_build_goto, gimple_build_asm_1): Likewise.
(gimple_build_switch_1, gimple_build_cdt): Likewise.
* gimple.h (GIMPLE_CHECK): Change 0 to ERROR_MARK in function
call.
(enum fallback): Rename from enum fallback_t.
(fallback_t): Typedef as int.
* gimple-low.c (lower_builtin_setjmp): Change TSI_SAME_STMT to
GSI_SAME_STMT in function call.
* ira.c (setup_class_subset_and_memory_move_costs): Add casts to
enum type.
(setup_reg_class_relations): Likewise.
(setup_reg_class_nregs): Change cl to int. Add casts to enum
type.
(setup_prohibited_class_mode_regs): Add cast to enum type.
(setup_prohibited_mode_move_regs): Likewise.
* ira-costs.c (record_reg_classes): Change rclass to enum
reg_class.
(record_address_regs): Change i to enum reg_class.
* lists.c (alloc_EXPR_LIST): Add cast to enum type.
* machmode.h (GET_MODE_CLASS): Cast value to enum mode_class.
(GET_MODE_WIDER_MODE): Cast value to enum machine_mode.
(GET_MODE_2XWIDER_MODE): Likewise.
(GET_CLASS_NARROWEST_MODE): Likewise.
* omp-low.c (expand_omp_for): Add cast to enum type.
* optabs.c (debug_optab_libfuncs): Add casts to enum type.
* opts.c (enable_warning_as_error): Change kind to diagostic_t.
* postreload.c (reload_cse_simplify_operands): Change rclass local
to enum reg_class.
* predict.c (combine_predictions_for_insn): Change best_predictor
and predictor to enum br_predictor.
(combine_predictions_for_bb): Likewise.
(build_predict_expr): Change assignment to PREDICT_EXPR_OUTCOME to
use SET_PREDICT_EXPR_OUTCOME.
* real.c (real_arithmetic): Change icode to code in function
call.
* reginfo.c (init_move_cost): Add casts to enum type.
(init_reg_sets_1, init_fake_stack_mems): Likewise.
* regmove.c (regclass_compatible_p): Change class0 and class1 to
enum reg_class.
* reload.c (find_valid_class): Add casts to enum type.
(push_reload): Change 0 to NO_REGS in function call.
(find_reloads): Change this_alternative to array of enum
reg_class. Remove some now-unnecessary casts.
(make_memloc): Change 0 to VOIDmode in function call.
* reload1.c (reload): Change 0 to VOIDmode in function call.
(eliminate_regs_1, elimination_effects): Likewise.
(eliminate_regs_in_insn): Likewise.
(emit_input_reload_insns): Add cast to enum type.
(delete_output_reload): Change 0 to VOIDmode in function call.
* reorg.c (insn_sets_resource_p): Convert include_delayed_effects
to enum type in function call.
* tree.h (PREDICT_EXPR_OUTCOME): Add cast to enum type.
(SET_PREDICT_EXPR_OUTCOME): Define.
* tree-dump.c (get_dump_file_info): Change phase parameter to
int.
(get_dump_file_name, dump_begin, dump_enabled_p): Likewise.
(dump_initialized_p, dump_flag_name, dump_end): Likewise.
(dump_function): Likewise.
* tree-dump.h: Update declarations.
* tree-pass.h: Update declarations.
* varasm.c (assemble_integer): Change mclass to enum mode_class.
* config/arm/arm.c (thumb_legitimize_reload_address): Add cast to
enum type.
(arm_rtx_costs_1): Correct parenthesization.
(arm_rtx_costs): Add casts to enum type.
(adjacent_mem_locations): Reverse arguments to const_ok_for_op.
(vfp_emit_fstmd): Use add_rg_note.
(emit_multi_reg_push, emit_sfm): Likewise.
(thumb_set_frame_pointer): Likewise.
(arm_expand_prologue): Likewise.
(arm_regno_class): Change return type to enum reg_class.
(thumb1_expand_prologue): Use add_reg_note.
* config/arm/arm-protos.h (arm_regno_class): Update declaration.
* config/arm/arm.h (INITIALIZE_TRAMPOLINE): Change 0 to LCT_NORMAL
in function call.
* config/arm/gentune.sh: Add cast to enum type.
* config/arm/arm-tune.md: Rebuild.
* config/i386/i386.c (ix86_expand_prologue): Use add_reg_note.
(ix86_split_fp_branch, predict_jump): Likewise.
(ix86_expand_multi_arg_builtin): Change sub_code from enum
insn_code to enum rtx_code.
(ix86_builtin_vectorized_function): Add cast to enum type.
* config/i386/i386.md (truncdfsf2): Change slot to enum
ix86_stack_slot.
(truncxf<mode>2, isinf<mode>2): Likewise.
* config/i386/i386-c.c (ix86_pragma_target_parse): Add cast to
enum type.
* config/ia64/ia64.c (ia64_split_tmode_move): Use add_reg_note.
(spill_restore_mem, do_spill, ia64_expand_prologue): Likewise.
(insert_bundle_state): Change 1 to INSERT in function call.
(ia64_add_bundle_selector_before): Likewise.
* config/ia64/ia64.md (cpu attr): Add cast to enum type.
(save_stack_nonlocal): Change 0 to LCT_NORMAL in function call.
(restore_stack_nonlocal): Likewise.
* config/mips/mips.h (MIPS_ICACHE_SYNC): Change 0 to LCT_NORMAL in
function call.
* config/mips/mips.c (mips_binary_cost): Change 0 to SET in
function call.
(mips_rtx_costs): Likewise.
(mips_override_options): Add casts to enum type.
* config/mips/sdemtk.h (MIPS_ICACHE_SYNC): Change 0 to LCT_NORMAL
in function call.
* config/pa/pa.c (legitimize_pic_address): Use add_reg_note.
(store_reg, set_reg_plus_d): Likewise.
(hppa_expand_prologue, hppa_profile_hook): Likewise.
* config/rs6000/rs6000.c (rs6000_init_hard_regno_mode_ok): Add
cast to enum type.
(altivec_expand_vec_set_builtin): Change 0 to EXPAND_NORMAL in
function call.
(emit_unlikely_jump): Use add_reg_note.
(rs6000_emit_allocate_stack): Likewise.
(rs6000_frame_related, rs6000_emit_prologue): Likewise.
(output_toc): Change 1 to INSERT in function call.
(output_profile_hook): Change 0 to LCT_NORMAL in function call.
(rs6000_initialize_trampoline): Likewise.
(rs6000_init_dwarf_reg_sizes_extra): Change 0 to EXPAND_NORMAL in
function call.
* config/s390/s390.c (s390_rtx_costs): Add cast to enum type.
(s390_expand_movmem): Change 0 to OPTAB_DIRECT in function call.
(s390_expand_setmem, s390_expand_cmpmem): Likewise.
(save_gprs): Use add_reg_note.
(s390_emit_prologue): Likewise.
(s390_expand_builtin): Change 0 to EXPAND_NORMAL in function
call.
* config/sparc/sparc.c (sparc_expand_prologue): Use add_reg_note.
(sparc_fold_builtin): Add cast to enum type.
* config/spu/spu.c (spu_emit_branch_or_set): Change ior_code to
enum insn_code.
(spu_expand_prologue): Use add_reg_note.
(expand_builtin_args): Change 0 to EXPAND_NORMAL in function
call.
* c-parser.c (c_parser_attributes): Change VEC back to tree list.
(c_parser_postfix_expression_after_primary): Get VEC for list of
arguments. Get original types of arguments. Call
build_function_call_vec.
(cached_expr_list_1, cached_expr_list_2): New static variables.
(c_parser_expr_list): Change return type to VEC *. Add
p_orig_types parameter. Change all callers.
(c_parser_release_expr): New static function.
(c_parser_vec_to_tree_list): New static function.
* c-typeck.c (build_function_call): Rewrite to build a VEC and
call build_function_call_vec.
(build_function_call_vec): New function, based on old
build_function_call.
(convert_arguments): Remove nargs and argarray parameters. Change
values to a VEC. Add origtypes parameter.
(build_modify_expr): Add rhs_origtype parameter. Change all
callers.
(convert_for_assignment): Add origtype parameter. Change all
callers. If warn_cxx_compat, check for conversion to an enum
type when calling a function.
(store_init_value): Add origtype parameter. Change all callers.
(digest_init): Likewise.
(struct init_node): Add origtype field.
(add_pending_init): Add origtype parameter. Change all callers.
(output_init_element): Likewise.
(output_pending_init_elements): Pass origtype from init_node to
output_init_element.
(process_init_elemnt): Pass origtype from c_expr to
output_init_element.
(c_finish_return): Add origtype parameter. Change all callers.
* c-common.c (sync_resolve_size): Change params to VEC *. Change
caller.
(sync_resolve_params): Likewise.
(sync_resolve_return): Change params to first_param. Change
caller.
(resolve_overloaded_builtins): Change params to VEC *. Change
callers. Save first parameter around call to
build_function_call_vec.
* c-decl.c (finish_decl): Add origtype parameter. Change all
callers. Call build_function_call_vec rather than
build_function_call for cleanup.
* c-tree.h: Update declarations.
* c-common.h: Update declarations.
* stub-objc.c (objc_rewrite_function_call): Change parameter from
params to first_param.
* target.h (struct gcc_target): Change resolve_overloaded_builtin
params parameter from tree to void *.
* config/rs6000/rs6000-c.c (altivec_resolve_overloaded_builtin):
Change arglist parameter to have type void *, and to be a pointer
to a VEC.
* config/rs6000/rs6000-protos.h
(altivec_resolve_overloaded_builtin): Update declaration.
* config/spu/spu-c.c (spu_resolved_overloaded_builtin): Change
fnargs parameter to have type void *, and to be a pointer to a
VEC. Call build_function_call_vec instead of
build_function_call.
* config/spu/spu-protos.h (spu_expand_builtin): Update
declaration.
gcc/cp/:
* typeck.c (build_function_call_vec): New function.
(cp_build_function_call): Only pass first parameter to
objc_rewrite_function_call.
(build_modify_expr): Add rhs_origtype parameter. Change all
callers.
* decl.c (finish_decl): Add origtype parameter. Change all
callers.
* semantics.c (finish_call_expr): Pass VEC to
resolve_overloaded_builtin.
gcc/objc:
* objc-act.c (objc_rewrite_function_call): Change parameter from
params to first_param. Change all callers.
gcc/testsuite:
* gcc.dg/Wcxx-compat-3.c: New testcase.
From-SVN: r146451
2008-08-26 Vladimir Makarov <vmakarov@redhat.com>
* ira-build.c, ira-color.c, ira-costs.c, ira.h, ira-lives.c,
ira.c, ira-conflicts.c, ira-emit.c, ira-int.h: New files.
* doc/passes.texi: Describe IRA.
* doc/tm.texi (IRA_COVER_CLASSES,
IRA_HARD_REGNO_ADD_COST_MULTIPLIER): Describe the new macros.
* doc/invoke.texi (ira-max-loops-num): Describe the new parameter.
(-fira, -fira-algorithm, -fira-coalesce, -fno-ira-move-spills,
-fira-propagate-cost, -fno-ira-share-save-slots,
-fno-ira-share-spill-slots, -fira-verbose): Describe new options.
* flags.h (ira_algorithm): New enumeration.
(flag_ira_algorithm, flag_ira_verbose): New external variable
declarations.
* postreload.c (gate_handle_postreload): Don't do post reload
optimizations unless the reload is completed.
* reload.c (push_reload, find_dummy_reload): Use DF_LR_OUT for
IRA.
* tree-pass.h (pass_ira): New external variable declaration.
* reload.h: Add 2008 to the Copyright.
* cfgloopanal.c: Include params.h.
(estimate_reg_pressure_cost): Decrease cost for IRA optimization
mode.
* params.h (IRA_MAX_LOOPS_NUM): New macro.
* toplev.c (ira.h): New include.
(flag_ira_algorithm, flag_ira_verbose): New external variables.
(backend_init_target): Call ira_init.
(backend_init): Call ira_init_once.
(finalize): Call finish_ira_once.
* toplev.h (flag_ira, flag_ira_coalesce, flag_ira_move_spills,
flag_ira_share_save_slots, flag_ira_share_spill_slots): New
external variables.
* regs.h (contains_reg_of_mode, move_cost, may_move_in_cost,
may_move_out_cost): New external variable declarations.
(move_table): New typedef.
* caller-save.c: Include headers output.h and ira.h.
(no_caller_save_reg_set): New global variable.
(save_slots_num, save_slots): New variables.
(reg_save_code, reg_restore_code, add_stored_regs): Add
prototypes.
(init_caller_save): Set up no_caller_save_reg_set.
(init_save_areas): Reset save_slots_num.
(saved_hard_reg): New structure.
(hard_reg_map, saved_regs_num, all_saved_regs): New variables.
(initiate_saved_hard_regs, new_saved_hard_reg,
finish_saved_hard_regs, saved_hard_reg_compare_func): New
functions.
(setup_save_areas): Add code for sharing stack slots.
(all_blocks): New variable.
(save_call_clobbered_regs): Process pseudo-register too.
(mark_set_regs): Process pseudo-register too.
(insert_one_insn): Put the insn after bb note in a empty basic
block. Add insn check.
* global.c (eliminable_regset): Make it external.
(mark_elimination): Use DF_LR_IN for IRA.
(pseudo_for_reload_consideration_p): New.
(build_insn_chain): Make it external. Don't ignore spilled
pseudos for IRA. Use pseudo_for_reload_consideration_p.
(gate_handle_global_alloc): New function.
(pass_global_alloc): Add the gate function.
* opts.c (decode_options): Set up flag_ira. Print the warning for
-fira.
(common_handle_option): Process -fira-algorithm and -fira-verbose.
* timevar.def (TV_IRA, TV_RELOAD): New passes.
* regmove.c (regmove_optimize): Don't do replacement of output for
IRA.
* hard-reg-set.h (no_caller_save_reg_set, reg_class_subclasses):
New external variable declarations.
* local-alloc.c (update_equiv_regs): Make it external. Return
true if jump label rebuilding should be done. Rescan new_insn for
notes.
(gate_handle_local_alloc): New function.
(pass_local_alloc): Add the gate function.
* alias.c (value_addr_p, stack_addr_p): New functions.
(nonoverlapping_memrefs_p): Use them for IRA.
* common.opt (fira, fira-algorithm, fira-coalesce,
fira-move-spills, fira-share-save-slots, fira-share-spill-slots,
fira-verbose): New options.
* regclass.c (reg_class_subclasses, contains_reg_of_mode,
move_cost, may_move_in_cost, may_move_out_cost): Make the
variables external.
(move_table): Remove typedef.
(init_move_cost): Make it external.
(allocate_reg_info, resize_reg_info, setup_reg_classes): New
functions.
* rtl.h (init_move_cost, allocate_reg_info, resize_reg_info,
setup_reg_classes): New function prototypes.
(eliminable_regset): New external variable declaration.
(build_insn_chain, update_equiv_regs): New function prototypes.
* Makefile.in (IRA_INT_H): New definition.
(OBJS-common): Add ira.o, ira-build.o, ira-costs.o,
ira-conflicts.o, ira-color.o, ira-emit.o, and ira-lives.o.
(reload1.o, toplev.o): Add dependence on ira.h.
(cfgloopanal.o): Add PARAMS_H.
(caller-save.o): Add dependence on output.h and ira.h.
(ira.o, ira-build.o, ira-costs.o, ira-conflicts.o, ira-color.o,
ira-emit.o, ira-lives.o): New entries.
* passes.c (pass_ira): New pass.
* params.def (PARAM_IRA_MAX_LOOPS_NUM): New parameter.
* reload1.c (ira.h): Include the header.
(changed_allocation_pseudos): New bitmap.
(init_reload): Initiate the bitmap.
(compute_use_by_pseudos): Permits spilled registers in FROM.
(temp_pseudo_reg_arr): New variable.
(reload): Allocate and free temp_pseudo_reg_arr. Sort pseudos for
IRA. Call alter_reg with the additional parameter. Don't clear
spilled_pseudos for IRA. Restore original insn chain for IRA.
Clear changed_allocation_pseudos at the end of reload.
(calculate_needs_all_insns): Call IRA's mark_memory_move_deletion.
(hard_regno_to_pseudo_regno): New variable.
(count_pseudo): Check spilled pseudos. Set up
hard_regno_to_pseudo_regno.
(count_spilled_pseudo): Check spilled pseudos. Update
hard_regno_to_pseudo_regno.
(find_reg): Use better_spill_reload_regno_p. Check
hard_regno_to_pseudo_regno.
(alter_reg): Set up spilled_pseudos. Add a new parameter. Add
code for IRA.
(eliminate_regs_1): Use additional parameter for alter_reg.
(finish_spills): Set up pseudo_previous_regs only for spilled
pseudos. Call reassign_pseudos once for all spilled pseudos, pass
more arguments. Don't clear live_throughout and dead_or_set for
spilled pseudos. Use additional parameter for alter_reg. Call
mark_allocation_change. Set up changed_allocation_pseudos.
Remove sanity check.
(emit_input_reload_insns, delete_output_reload): Use additional
parameter for alter_reg. Call mark_allocation_change.
(substitute, gen_reload_chain_without_interm_reg_p): New
functions.
(reloads_conflict): Use gen_reload_chain_without_interm_reg_p.
* testsuite/gcc.dg/20080410-1.c: New file.
* config/s390/s390.h (IRA_COVER_CLASSES,
IRA_HARD_REGNO_ADD_COST_MULTIPLIER): Define.
* config/sparc/sparc.h (IRA_COVER_CLASSES): New macro.
* config/i386/i386.h (IRA_COVER_CLASSES): Ditto.
* config/ia64/ia64.h (IRA_COVER_CLASSES): Ditto.
* config/rs6000/rs6000.h (IRA_COVER_CLASSES): Ditto.
* config/arm/arm.h (IRA_COVER_CLASSES): Ditto.
* config/alpha/alpha.h (IRA_COVER_CLASSES): Ditto.
2008-08-24 Jeff Law <law@redhat.com>
* ira.c (setup_reg_class_intersect_union): Prefer smallest class
when ignoring unavailable registers.
2008-08-24 Jeff Law <law@redhat.com>
* ira-color.c (coalesced_pseudo_reg_slot_compare): Check
FRAME_GROWS_DOWNWARD and STACK_GROWS_DOWNWARD.
* ira.c (setup_eliminable_regset): Check stack_realign_needed.
* config/mn10300/mn10300.h (IRA_COVER_CLASSES): New macro.
2008-06-03 Steve Chamberlain <steve.chamberlain@gmail.com>
* ira-build.c (allocno_range_compare_func): Stabilize sort.
2008-05-29 Andy Hutchinson <hutchinsonandy@aim.com>
* config/avr/avr.h (IRA_COVER_CLASSES): New macro.
* reload1.c (find_reg): Process registers in register allocation order.
2008-05-10 Richard Sandiford <rsandifo@nildram.co.uk>
* toplev.c (backend_init_target): Move ira_init call from
here...
(lang_dependent_init_target): ...to here.
2008-05-10 Richard Sandiford <rsandifo@nildram.co.uk>
* ira.c (setup_class_subset_and_memory_move_costs): Don't
calculate memory move costs for NO_REGS.
2008-05-05 Kaz Kojima <kkojima@gcc.gnu.org>
* ira-color.c (ira_fast_allocation): Use no_stack_reg_p only if
STACK_REGS is defined.
2008-04-08 Andrew Pinski <andrew_pinski@playstation.sony.com>
* config/spu/spu.h (IRA_COVER_CLASSES): New macro.
2008-04-04 Bernd Schmidt <bernd.schmidt@analog.com>
* config/bfin/bfin.h (IRA_COVER_CLASSES): New macro.
2008-04-04 Kaz Kojima <kkojima@gcc.gnu.org>
* config/sh/sh.h (IRA_COVER_CLASSES): Define.
* config/sh/sh.md (movsicc_true+3): Check if emit returns a
barrier.
From-SVN: r139590
2008-08-06 Andreas Krebbel <krebbel1@de.ibm.com>
* reload.c (find_reloads): Force constants into literal pool
also if they are wrapped in a SUBREG.
2008-08-06 Andreas Krebbel <krebbel1@de.ibm.com>
* gcc.c-torture/compile/20080806-1.c: New testcase.
From-SVN: r138763
2008-05-27 Andreas Krebbel <krebbel1@de.ibm.com>
* reload.c: (find_reloads): Skip alternatives according to the
"enabled" attribute. Constify the constraint variable.
* recog.c (get_attr_enabled): Add default implementation.
(extract_insn): Set the alternative_enabled_p array
in the recog_data struct.
(preprocess_constraints, constrain_operands): Skip
alternatives according to the "enabled" attribute
* recog.h (struct recog_data): New field alternative_enabled_p.
(skip_alternative): New inline function.
* regclass.c: (record_operand_costs): Check the "enabled"
attribute.
(record_reg_classes): Skip alternative according to the
"enabled" attribute.
* doc/md.texi: Add documention for the "enabled" attribute.
From-SVN: r136012
gcc/
PR rtl-optimization/34995
* reload.c (alternative_allows_const_pool_ref): Take an rtx
parameter and return a bool. If the rtx parameter is nonnull,
check that it satisfies an EXTRA_MEMORY_CONSTRAINT.
(find_reloads): Update call accordingly. Pass the new operand
if it needed no address reloads, otherwise pass null.
From-SVN: r131976
2008-01-10 Andreas Krebbel <krebbel1@de.ibm.com>
PR middle-end/34641
* reload.c (push_reload): Add assertions. All constants from
reg_equiv_constant should have been used for replacing the respective
pseudo earlier.
(find_reloads_address): Invoke find_reloads_address_part for
constant taken from the reg_equiv_constant array.
2008-01-10 Andreas Krebbel <krebbel1@de.ibm.com>
PR middle-end/34641
* g++.dg/torture/pr34641.C: New testcase.
From-SVN: r131445
gcc/
* rtl.def (SUBREG): Update comments.
* rtl.h (reg_attrs): Be explicit about the type of offset used.
(set_reg_attrs_from_mem): Rename to...
(set_reg_attrs_from_value): ...this.
(adjust_reg_mode, byte_lowpart_offset): Declare.
* emit-rtl.c (byte_lowpart_offset): New function.
(update_reg_offset): Remove special offset handling for big-endian
targets.
(gen_rtx_REG_offset, gen_reg_rtx_offset): Explicitly say that the
offset parameter is added to REG_OFFSET.
(adjust_reg_mode): New function.
(set_reg_attrs_for_mem): Rename to...
(set_reg_attrs_for_value): ...this and generalize to all values.
If the register is a lowpart of the value, adjust the offset
accordingly.
(set_reg_attrs_for_parm): Update after the above renaming.
(set_reg_attrs_for_decl_rtl): New function, split out from
set_decl_incoming_rtl. Set the offset of plain REGs to the
offset of the REG's mode from the decl's. Assert that all
subregs are lowparts and handle their inner registers in the
same way as plain REGs.
(set_decl_rtl, set_incoming_decl_rtl): Use reg_attrs_for_decl_rtl.
(subreg_lowpart_offset): Explicitly say that the returned offset
is a SUBREG_BYTE.
* combine.c (do_SUBST_MODE, try_combine, undo_all): Use adjust_reg_mode
instead of PUT_MODE.
* final.c (alter_subreg): Fix/update argument to gen_rtx_REG_offset.
* config/ia64/ia64.c (ia64_expand_load_address): Likewise.
* regclass.c (reg_scan_mark_refs): Use set_reg_attrs_from_value.
* reload.c (find_reloads_subreg_address): Call set_mem_offset
when offseting a MEM.
* var-tracking.c (offset_valid_for_tracked_p): Delete.
(mode_for_reg_attrs): Replace with...
(track_loc_p): ...this new function. Return the mode and offset
to the caller, checking that the latter is valid. If the rtx is
a paradoxical lowpart of the decl, use the decl's mode instead.
Do the same when storing to a register that contains the entire decl.
(var_lowpart): Use byte_lowpart_offset rather than
subreg_lowpart_offset when adjusting the offset attribute.
(count_uses, add_uses, add_stores): Use track_reg_p instead of
REG_EXPR, MEM_EXPR, REG_OFFSET, INT_MEM_OFFSET, track_expr_p,
offset_valid_for_tracked_p and mode_for_reg_attrs. Generate
lowparts for MEMs as well as REGs.
(vt_add_function_parameters): When obtaining the information from
the decl_rtl, adjust the offset to match incoming. Use track_loc_p
and var_lowpart.
From-SVN: r131055
* reload.c (find_reloads_address_1): To properly mark as an
autoincdec, pass X for non-NULL OUT in call to push_reload for
autoincdec which can't be trivially used as an address.
From-SVN: r130734
PR rtl-optimization/33732
* reload.c (push_reload): Check that the REG_DEAD note was referring
to a hardreg or to a pseudo that has been assigned exactly one hardreg
before considering it in order to select the reload register.
(combine_reloads): Likewise.
(find_dummy_reload): Likewise.
From-SVN: r130042
gcc/
2007-11-06 Ulrich Weigand <Ulrich.Weigand@de.ibm.com>
PR target/30961
* reload1.c (find_reloads): Also check in_reg when handling a
simple move with an input reload and a destination of a hard
register.
gcc/testsuite/
2007-11-06 H.J. Lu <hongjiu.lu@intel.com>
PR target/30961
* gcc.target/i386/pr30961-1.c: New.
From-SVN: r129943
2007-09-02 Kenneth Zadeck <zadeck@naturalbridge.com>
* ra-conflict.c: New file.
* ra.h: New file.
* reload.c (push_reload, find_dummy_reload): Change DF_RA_LIVE
usage to DF_LIVE usage.
* rtlanal.c (subreg_nregs_with_regno): New function.
* df-scan.c (df_def_record_1, df_uses_record): Add code to set
DF_REF_EXTRACT, DF_REF_STRICT_LOWER_PART, and DF_REF_SUBREG flags.
(df_has_eh_preds): Removed.
(df_bb_refs_collect, df_bb_refs_collect, df_bb_refs_collect,
df_exit_block_uses_collect): Changed call from df_has_eh_preds to
bb_has_eh_pred.
* global.c (allocno, max_allocno, conflicts, allocno_row_words,
reg_allocno, EXECUTE_IF_SET_IN_ALLOCNO_SET): Moved to ra.h
(SET_ALLOCNO_LIVE, CLEAR_ALLOCNO_LIVE): Moved to ra-conflicts.c.
(regs_set, record_one_conflict, record_conflicts, mark_reg_store,
mark_reg_clobber, mark_reg_conflicts, mark_reg_death): Deleted.
(global_alloc): Turn off rescanning insns after call to
global_conflicts and added call to set_preferences.
(global_conflicts): Moved to ra-alloc.c.
(set_preferences_1, set_preferences): New function.
(mirror_conflicts): Changed types for various variables.
(mark_elimination): Change DF_RA_LIVE
usage to DF_LIVE usage.
(build_insn_chain): Rewritten from scratch and made local.
(print_insn_chain, print_insn_chains): New functions.
(dump_conflicts): Do not print conflicts for fixed_regs.
(rest_of_handle_global_alloc): Turn off insn rescanning.
* hard-reg-set.h: Fixed comment.
* local-alloc.c (update_equiv_regs): Change DF_RA_LIVE
usage to DF_LIVE usage and delete refs to TOP sets.
(block_alloc): Mark regs as live if they are in the artificial
defs at top of block.
(find_stack_regs): New function.
(rest_of_handle_local_alloc): Changed urec problem to live
problem and do not turn off df rescanning.
* df.h (DF_UREC, DF_UREC_BB_INFO, DF_LIVE_TOP, DF_RA_LIVE_IN,
DF_RA_LIVE_TOP, DF_RA_LIVE_OUT, df_urec_bb_info, df_urec,
df_urec_add_problem, df_urec_get_bb_info, df_has_eh_preds): Removed.
(DF_CHAIN, DF_NOTE, DF_CHAIN): Renumbered.
(DF_REF_EXTRACT, DF_REF_STRICT_LOWER_PART, DF_REF_SUBREG): New
fields in df_ref_flags. The rest have been renumbered.
* init-regs.c (initialize_uninitialized_regs): Enhanced debugging
at -O1.
* rtl.h (subreg_nregs_with_regno): New function.
* df-problems.c: (df_get_live_out, df_get_live_in,
df_get_live_top): Removed reference to DF_RA_LIVE.
(df_lr_reset, df_lr_transfer_function, df_live_free_bb_info,
df_live_alloc, df_live_reset, df_live_local_finalize,
df_live_free): Make top set only if different from in set.
(df_lr_top_dump, df_live_top_dump): Only print top set if
different from in set.
(df_lr_bb_local_compute): Removed unnecessary check.
(df_urec_problem_data, df_urec_set_bb_info, df_urec_free_bb_info,
df_urec_alloc, df_urec_mark_reg_change, earlyclobber_regclass,
df_urec_check_earlyclobber, df_urec_mark_reg_use_for_earlyclobber,
df_urec_mark_reg_use_for_earlyclobber_1, df_urec_bb_local_compute,
df_urec_local_compute, df_urec_init, df_urec_local_finalize,
df_urec_confluence_n, df_urec_transfer_function, df_urec_free,
df_urec_top_dump, df_urec_bottom_dump, problem_UREC,
df_urec_add_problem): Removed.
(df_simulate_fixup_sets): Changed call from df_has_eh_preds to
bb_has_eh_pred.
* Makefile.in (ra-conflict.o, ra.h): New dependencies.
* basic_block.h (bb_has_abnormal_pred): New function.
* reload1.c (compute_use_by_pseudos): Change DF_RA_LIVE
usage to DF_LIVE usage.
From-SVN: r128957
* doc/rtl.texi (Insns): Specify when a label_ref makes a jump_insn.
Similar for what label_refs can go in the JUMP_TARGET field. Split
REG_LABEL documentation into REG_LABEL_TARGET and REG_LABEL_OPERAND.
* reload.c (find_reloads): Generate REG_LABEL_OPERAND, not
REG_LABEL when replacing an operand with a LABEL_REF for a
non-jump insn.
(subst_reloads): When replacing a LABEL_REG with a register,
instead of generating a REG_LABEL note, assert that there already
is one or that the label is a known target for the insn.
* rtlanal.c (computed_jump_p): Instead of looking for a REG_LABEL
note, check the JUMP_LABEL field. Remove "else" after return.
* reorg.c (emit_delay_sequence): Replace case for REG_LABEL with
cases for REG_LABEL_OPERAND and REG_LABEL_TARGET.
(fill_slots_from_thread): Handle both REG_LABEL_OPERAND and
REG_LABEL_TARGET notes, including the JUMP_TARGET field on JUMP_P
insns. Iterate over all notes; don't assume there's only one.
* cse.c (recorded_label_ref): Adjust comment to refer to
REG_LABEL_OPERAND.
(cse_extended_basic_block): Do LABEL_REF check for all INSN_P
insns, not just NONJUMP_INSN_P.
(check_for_label_ref): For JUMP_P insns, check that the LABEL_REF
isn't a jump target.
* jump.c (rebuild_jump_labels): Adjust head comment.
(init_label_info): Ditto. Remove REG_LABEL_OPERAND notes only;
don't reset REG_LABEL_TARGET notes, including the JUMP_LABEL field.
(mark_all_labels): For JUMP_P insns without a target, check if the
the target is noted on the previous nonjump insn.
(mark_jump_label_1): New function, guts from mark_jump_label.
<case IF_THEN_ELSE>: Handle first operand as a non-target when
marking jump target labels.
<case LABEL_REF>: Adjust for whether to generate a
REG_LABEL_TARGET or a REG_LABEL_OPERAND note.
For 'E' format rtl, iterate in descending element order.
(delete_related_insns): Handle both REG_LABEL_TARGET and
REG_LABEL_OPERAND notes. For JUMP_P insns with labels with zero
reference count, delete and fallthrough. Move finding-next-
non-deleted insn last in the function. Look at all INSN_P insns
for REG_LABEL_OPERAND notes.
(redirect_jump_2): Assert that OLABEL equals the old JUMP_LABEL of
JUMP.
* print-rtl.c (print_rtx): For JUMP_P insns and a non-NULL
JUMP_LABEL, output the INSN_UID of it.
* gcse.c: Adjust comments as appropriate to say REG_LABEL_OPERAND
and/or REG_LABEL_TARGET.
(add_label_notes): Only add REG_LABEL_OPERAND notes. Put in line
with jump.c copy by only adding notes for labels actually
referenced in the insn.
* emit-rtl.c (try_split): Don't assume only NONJUMP_INSN_P need
usage count increment; handle all INSN_P trial insns.
(emit_copy_of_insn_after): Change to not copy REG_LABEL_OPERAND
notes.
* rtl.h (struct rtx_def) <volatil>: Adjust to mention
REG_LABEL_TARGET and REG_LABEL_OPERAND.
(LABEL_REF_NONLOCAL_P): Allow REG_LABEL_TARGET and
REG_LABEL_OPERAND.
* combine.c (distribute_notes): Adjust for REG_LABEL_TARGET on
JUMP_P insns and REG_LABEL_OPERAND everywhere.
* sched-rgn.c (is_cfg_nonregular): Check for REG_LABEL_OPERANDS
on all INSN_P insns.
* reg-notes.def (LABEL_TARGET, LABEL_OPERAND): Split from LABEL.
* cfgrtl.c (delete_insn): Adjust to handle REG_LABEL_TARGET and
REG_LABEL_OPERAND notes.
* reload1.c (calculate_needs_all_insns): Adjust comments.
(set_label_offsets): Adjust to look for REG_LABEL_OPERAND notes.
* config/alpha/alpha.md (split for load of an address into a
four-insn sequence on Unicos/Mk): Adjust to use
REG_LABEL_OPERAND.
* config/sh/sh.md (sh_reorg, final_prescan_insn): Ditto.
From-SVN: r128287
gcc/
PR middle-end/32897
* reload.c (find_reloads): Check that the memory returned by
find_reloads_toplev was not the result of forcing a constant
to memory.
(find_reloads_toplev): Always use simplify_gen_subreg to get
the subreg of a constant. If the result is also a constant,
but not a legitimate one, force it into the constant pool
and reload its address.
gcc/testsuite/
* gcc.dg/torture/pr32897.c: New test.
From-SVN: r127536
gcc/
* regs.h (end_hard_regno): New function.
(END_HARD_REGNO, END_REGNO): New macros.
(add_to_hard_reg_set): New function.
(remove_from_hard_reg_set): Likewise.
(in_hard_reg_set_p): Likewise.
(overlaps_hard_reg_set_p): Likewise.
* bt-load.c (find_btr_reference): Use overlaps_hard_reg_set_p.
(note_btr_set): Use END_HARD_REGNO.
* caller-save.c (setup_save_areas): Use end_hard_regno.
(mark_set_regs): Use END_HARD_REGNO.
(add_stored_regs): Use end_hard_regno.
(mark_referenced_regs): Use add_to_hard_reg_set.
* combine.c (update_table_tick): Use END_REGNO.
(record_value_for_reg): Likewise.
(record_dead_and_set_regs): Likewise.
(get_last_value_validate): Likewise.
(use_crosses_set_p): Likewise.
(reg_dead_at_p_1): Likewise.
(reg_dead_at_p): Likewise.
(mark_used_regs_combine): Use add_to_hard_reg_set.
(move_deaths): Use END_HARD_REGNO.
(reg_bitfield_target_p): Use end_hard_regno.
(distribute_notes): Use END_HARD_REGNO.
* cse.c (mention_regs): Use END_REGNO.
(insert): Use add_to_hard_reg_set.
(invalidate): Use END_HARD_REGNO.
(invalidate_for_call): Likewise.
(exp_equiv_p): Use END_REGNO.
(cse_insn): Likewise.
* cselib.c (cselib_invalidate_regno): Use end_hard_regno.
* df-problems.c (df_urec_mark_reg_change): Use END_HARD_REGNO.
* df-scan.c (df_ref_record): Use END_HARD_REGNO.
* function.c (keep_stack_depressed): Use end_hard_regno.
* global.c (global_alloc): Use end_hard_regno.
(global_conflicts): Use add_to_hard_reg_set instead of
mark_reg_live_nc.
(find_reg): Likewise.
(mark_reg_store): Likewise.
(mark_reg_conflicts): Likewise.
(mark_reg_death): Use remove_from_hard_reg_set.
(mark_reg_live_nc): Delete.
(set_preference): Use end_hard_regno.
* local-alloc.c (mark_life): Use add_to_hard_reg_set and
remove_from_hard_reg_set.
(post_mark_life): Use add_to_hard_reg_set.
* mode-switching.c (reg_dies): Use remove_from_hard_reg_set.
(reg_becomes_live): Use add_to_hard_reg_set.
* recog.c (reg_fits_class_p): Use in_hard_reg_set_p.
(peep2_find_free_register): Use add_to_hard_reg_set.
* reg-stack.c (convert_regs_exit): Use END_HARD_REGNO.
* regclass.c (record_reg_classes): Use in_hard_reg_set_p.
* regrename.c (note_sets): Use add_to_hard_reg_set.
(clear_dead_regs): Use remove_from_hard_reg_set.
(regrename_optimize): Use add_to_hard_reg_set.
(find_oldest_value_reg): Use in_hard_reg_set_p.
* reload.c (push_reload): Use in_hard_reg_set_p and end_hard_regno.
(hard_reg_set_here_p): Use end_hard_regno.
(decompose): Likewise.
(reg_overlap_mentioned_for_reload_p): Use END_HARD_REGNO.
(find_equiv_reg): Use in_hard_reg_set_p and end_hard_regno.
* reload1.c (compute_use_by_pseudos): Use add_to_hard_reg_set.
(mark_home_live): Use end_hard_regno.
(spill_hard_reg): Likewise.
(clear_reload_reg_in_use): Likewise.
* reorg.c (delete_prior_computation): Use END_REGNO.
* resource.c (update_live_status): Use END_HARD_REGNO.
(mark_referenced_resources): Use add_to_hard_reg_set.
(mark_set_resources): Likewise.
(mark_target_live_regs): Likewise. Use remove_from_hard_reg_set.
* rtlanal.c (refers_to_regno_p): Use END_REGNO.
(reg_overlap_mentioned_p): Likewise.
(dead_or_set_p): Likewise. Use an exclusive upper loop bound.
(covers_regno_no_parallel_p): Use END_REGNO.
(find_regno_note): Likewise.
(find_reg_fusage): Use END_HARD_REGNO.
* stmt.c (decl_overlaps_hard_reg_set_p): Use overlaps_hard_reg_set_p.
* var-tracking.c (emit_note_insn_var_location): Use end_hard_regno.
From-SVN: r124961
PR rtl-optimization/28011
* reload.c (push_reload): Set dont_share if IN appears in OUT
also when IN is a PLUS rtx.
(reg_overlap_mentioned_for_reload_p): Return true if X and IN
are same PLUS rtx.
From-SVN: r124557
gcc/
* reload.h (elimination_target_reg_p): Declare.
* reload.c (find_reloads): Don't apply the reg_rtx move
optimization if the SET_DEST satisfies elimination_target_reg_p.
* reload1.c (elimination_target_reg_p): New function.
(gen_reload): In the move/add2 fallback, make sure that op0
does not overlap the destination register.
From-SVN: r124215
gcc/:
PR target/28675
* reload.c (find_reloads_subreg_address): If the address was valid
in the original mode but not in the new mode, reload the whole
address.
testsuite/:
PR target/28675
* gcc.c-torture/compile/pr28675.c: New test.
From-SVN: r124211
* reload.c (find_reloads_toplev, find_reloads_address,
find_reloads_address_1, find_reloads_subreg_address): Use rtx_equal_p,
not a pointer equality test, to decide if we need to call
push_reg_equiv_alt_mem.
From-SVN: r123724
* reload.c (find_reloads_address_1): Handle PLUS expressions resulting
from register elimination as PRE_MODIFY / POST_MODIFY increments.
Do not attempt to handle MEM inside auto-inc expressions.
* reload1.c (eliminate_regs_1): Do not attempt to handle elimination
of a register modified by an auto-inc expression. However, do handle
elimination of a register used as PRE_MODIFY / POST_MODIFY increment.
(elimination_effects): Prohibit elimination of a register modified
by an auto-inc expression. Disable register elimination rules whose
target register is modified by an auto-inc expression with variable
increment.
From-SVN: r122318
Alexandre Oliva
Ulrich Weigand
Ian Lance Taylor
Shujing Zhao
Paolo Bonzini
Vladimir Makarov
Jakub Jelinek
Richard Sandiford
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