* combine.c (num_sign_bit_copies): In NEG, MULT, DIV and MOD cases,
when a test can't be performed due to limited width of
HOST_BITS_PER_WIDE_INT, use the more conservative approximation.
Fix UDIV case for cases where the first operand has the highest bit
set.
From-SVN: r24547
* Makefile.in (recog.o): Depend on toplev.h.
(insn-emit.o): Depend on recog.h.
(insn-peep.o): Depend on recog.h and insn-config.h.
* combine.c (simplify_set): Remove unused variable `scratches'.
* final.c (final_scan_insn): Wrap declaration of variables `vlen'
and `idx' in macro conditional controlling their use.
* genemit.c (main): Make the generated output file include
recog.h. Don't have it declare `insn_operand_constraint', since
we get it from recog.h.
* genpeep.c (main): Make the generated output file include
insn-config.h and recog.h.
* recog.c: Include toplev.h.
(extract_insn): Remove unused variable `p'.
* regclass.c (fix_register): Add missing braces around initializer
for `what_option'.
(allocate_reg_info): Move variable `i' into the scope where it is
used. Change its type to `size_t'.
From-SVN: r23307
* Makefile.in (sched.o): Depend on recog.h.
* alias.c (REG_BASE_VALUE): Cast the result of REGNO() macro to
(unsigned) when comparing against one.
(find_base_value): Likewise.
(record_base_value): Cast variable `regno' to (unsigned) when
comparing against one. Cast the result of REGNO() macro to
(unsigned) when comparing against one.
(memrefs_conflict_p): Change type of variables `r_x' and `r_y' to
unsigned.
(init_alias_analysis): Add unsigned variable `ui'. Use it as loop
variable where an unsigned index is needed.
* caller-save.c (init_caller_save): Cast `-1' to (enum insn_code)
before comparing against one.
* collect2.c: Add prototypes for functions `error', `fatal' and
`fatal_perror'. Make these functions take variable arguments
instead of faking it with a fixed number of args.
(write_c_file_stat): Cast the argument of ctype macro to (unsigned
char).
* combine.c (can_combine_p): Mark parameter `pred' with
ATTRIBUTE_UNUSED.
(find_split_point): Cast variable `src' to (unsigned
HOST_WIDE_INT) when comparing against one.
HOST_WIDE_INT) when comparing against one.
(simplify_rtx): Cast 1 to (unsigned HOST_WIDE_INT) in shift.
(simplify_logical): Likewise.
(force_to_mode): Cast result of INTVAL() macro to (unsigned
HOST_WIDE_INT) when comparing against one. Cast 1 to (unsigned
HOST_WIDE_INT) in shift.
(simplify_and_const_int): Cast result of INTVAL() macro to
`unsigned HOST_WIDE_INT' when comparing against one.
(merge_outer_ops): Cast variable const0 to `unsigned
HOST_WIDE_INT' when comparing against the result of
GET_MODE_MASK() macro.
(simplify_comparison): Likewise for variable `c0'. Cast variable
`const_op' to `unsigned HOST_WIDE_INT' when comparing against
one. Cast `1' to `unsigned HOST_WIDE_INT' in shift. Cast the
result of `GET_MODE_MASK()/2' to `HOST_WIDE_INT' when comparing
against one. Cast `1' to `unsigned HOST_WIDE_INT' in shift. Cast
result of INTVAL() macro to `unsigned HOST_WIDE_INT' when
comparing against one.
(distribute_notes): Wrap variable `cc0_setter' in macro `HAVE_cc0'.
config/mips/mips.c (gen_int_relational): Cast result of INTVAL()
macro to `unsigned HOST_WIDE_INT' when comparing against one.
(output_block_move): Cast `sizeof' expression to (int) when
comparing against one.
(function_arg): Cast BITS_PER_WORD to `unsigned' when comparing
against one.
(save_restore_insns): Cast `base_offset' to `long' to match format
specifier in fprintf.
* config/mips/mips.h (Pmode): Cast the result of `Pmode' macro
to `enum machine_mode'.
* flow.c (life_analysis_1): Remove unused variable `insn'.
* gcc.c (translate_options): Move variables `j' and `k' into the
scope in which they are used. Change their types to `size_t'.
(set_spec): Cast the argument of ctype macro to `unsigned char'.
(read_specs): Likewise.
(process_command): Cast `sizeof' to (int) when comparing against one.
(do_spec_1): Cast the argument of ctype macro to `unsigned char'.
(handle_braces): Cast both sides of `==' expression to `long' to
ensure sign matching.
(main): Cast variable `i' to `int' when comparing against one.
* gcov-io.h (__fetch_long): Change type of parameter `bytes' from
int to size_t. Cast variable `i' to size_t when comparing against
one.
* genattrtab.c (convert_set_attr_alternative): Remove unused
parameter `insn_code'. All callers changed.
(convert_set_attr): Likewise.
* genrecog.c (add_to_sequence): Cast result of XVECLEN() macro to
size_t when comparing against one. Likewise for variable `len'.
* global.c (global_alloc): Cast variable `max_regno' to size_t
when comparing against one. Likewise for variable `max_allocno'.
* jump.c (sets_cc0_p): Mark parameter `x' with ATTRIBUTE_UNUSED.
* local-alloc.c (validate_equiv_mem_from_store): Mark parameter
`set' with ATTRIBUTE_UNUSED.
(find_free_reg): Cast `sizeof' expression to (int) when comparing
against one.
* loop.c (count_loop_regs_set): Remove unused variable `dest'.
(strength_reduce): Mark parameter `bct_p' with ATTRIBUTE_UNUSED.
(get_condition): Cast variable `const_val' to `unsigned
HOST_WIDE_INT' when comparing against one. Cast unsigned
expression to HOST_WIDE_INT when comparing against one.
(insert_loop_mem): Mark parameter `data' with ATTRIBUTE_UNUSED.
(load_mems_and_recount_loop_regs_set): Cast variable `nregs' to
`unsigned' when comparing against one.
* protoize.c (is_id_char): Change type of parameter `ch' to
unsigned char.
(munge_compile_params): Cast argument of ctype macro to (const
unsigned char).
(process_aux_info_file): Cast variable `aux_info_size' to int when
comparing against one.
(forward_to_next_token_char): Cast argument of ctype macro to
`const unsigned char'.
(edit_formals_lists): Likewise.
(find_rightmost_formals_list): Likewise.
(add_local_decl): Likewise.
(add_global_decls): Likewise.
(edit_fn_definition): Likewise.
(do_cleaning): Likewise.
(scan_for_missed_items): Likewise.
(edit_file): Cast variable `orig_size' to (int) when comparing
against one.
(main): Cast argument of ctype macro to `const unsigned char'.
* recog.c (const_int_operand): Mark parameter `mode' with
ATTRIBUTE_UNUSED.
* regclass.c (record_reg_classes): Change type of variable `c' to
`unsigned char'. Cast `char' array index to `unsigned char'.
* reload.c (push_secondary_reload): Cast argument to
REG_CLASS_FROM_LETTER() macro to `unsigned char'.
* reload1.c (calculate_needs): Cast `char' array index to
`unsigned char'.
(set_label_offsets): Change type of variable `i' to unsigned int.
Cast result of XVECLEN() macro to unsigned when comparing against
one.
(mark_not_eliminable): Change type of variable `i' to unsigned.
(order_regs_for_reload): Likewise. Cast `max_regno' to unsigned
when comparing against one.
(reload_as_needed): Cast macro NUM_ELIMINABLE_REGS to (int) when
comparing against one.
(choose_reload_regs): Hide unused label `fail'.
(reload_cse_simplify_operands): Cast `char' array index to
`unsigned char'.
(reload_combine_note_store): Mark parameter `set' with
ATTRIBUTE_UNUSED. Cast UNITS_PER_WORD to unsigned when comparing
against one.
(reload_cse_move2add): Remove unused variable `src2'.
* sched.c: Include recog.h.
(sched_note_set): Remove unused parameter `b'. All callers
changed.
(split_hard_reg_notes): Likewise for parameter `orig_insn'.
(blockage_range): Cast result of UNIT_BLOCKED() macro to (int)
when comparing against one.
* stupid.c (stupid_find_reg): Mark parameter `changes_size' with
ATTRIBUTE_UNUSED. Cast `sizeof' expression to (int) when
comparing against one.
* unroll.c (precondition_loop_p): Remove unused parameter
`loop_end'. All callers changed.
From-SVN: r23079
* combine.c (make_extraction): If no mode is specified for
an operand of insv, extv, or extzv, default it to word_mode.
(simplify_comparison): Similarly.
* expmed.c (store_bit_field): Similarly.
(extract_bit_field): Similarly.
* function.c (fixup_var_regs_1): Similarly.
* recog.c (validate_replace_rtx_1): Similarly.
* mips.md (extv, extzv, insv expanders): Default modes for most
operands. Handle TARGET_64BIT.
(movdi_uld, movdi_usd): New patterns.
From-SVN: r22439
* alias.c: Include toplev.h
* caller-save.c: Include toplev.h
* combine.c: Include toplev.h
* flow.c Include toplev.h
* global.c: Include toplev.h
* jump.c: Include toplev.h
* local-alloc.c: Include toplev.h
* loop.c: Include toplev.h
* regmove.c: Include toplev.h
* stupid.c: Include toplev.h
* unroll.c: Include toplev.h
* Makefile.in: Add toplev.h dependencies.
From-SVN: r20623
* Makefile.in (c-lang.o): Depend on c-tree.h, c-lex.h and toplev.h.
(c-lex.o): Depend on output.h.
(c-common.o): Likewise.
(stmt.o): Likewise.
(calls.o): Likewise.
(integrate.o): Depend on toplev.h.
(regclass.o): Depend on output.h.
(final.o): Depend on reload.h.
* c-common.c: Include output.h.
(check_format_info): Remove unused variable `integral_format'.
* c-decl.c (print_lang_decl): Mark parameters `file', `node' and
`indent' with ATTRIBUTE_UNUSED.
(print_lang_type): Likewise.
(maybe_build_cleanup): Likewise for parameter `decl'.
(copy_lang_decl): Likewise for parameter `node'.
* c-lang.c: Include c-tree.h, c-lex.h and toplev.h.
(lang_print_xnode): Mark parameters `file', `node' and `indent'
with ATTRIBUTE_UNUSED.
(lookup_interface): Likewise for parameter `arg'.
(is_class_name): Likewise.
(maybe_objc_check_decl): Likewise for parameter `decl'.
(maybe_objc_comptypes): Likewise for parameters `lhs', `rhs' and
`reflexive'.
(maybe_objc_method_name): Likewise for parameter `decl'.
(build_objc_string): Likewise for parameters `len' and `str'.
* c-lex.c: Include output.h.
* c-lex.h (position_after_white_space): Correct typo in prototype.
* c-tree.h (finish_file, c_expand_start_cond, c_expand_start_else,
c_expand_end_cond, init_iterators): Add prototypes.
* caller-save.c (set_reg_live): Mark parameters `reg' and `setter'
with ATTRIBUTE_UNUSED.
* calls.c: Include output.h.
* cccp.c (pipe_closed): Mark parameter `signo' with
ATTRIBUTE_UNUSED.
* combine.c: Move inclusion of expr.h to after insn-config.h.
* iris6.h (ASM_IDENTIFY_GCC, ASM_IDENTIFY_LANGUAGE): Don't define
as empty, rather define as ((void)0).
* sparc.c (sparc_check_64): Add braces around ambiguous `else'.
Add parentheses around assignment used as truth value.
* cplus-dem.c (squangle_mop_up): Change return type to void.
(internal_cplus_demangle): Remove unused parameter `options'.
All callers changed.
(cplus_demangle_opname): Remove function wide variable `int i' and
replace with `size_t i' at each location where it is used.
(cplus_demangle_opname): change type of `i' from int to size_t.
* cppexp.c (right_shift): Mark parameter `pfile' with
ATTRIBUTE_UNUSED.
* cpphash.c (cpp_lookup): Likewise.
(cpp_hash_cleanup): Likewise.
* cpplib.c (parse_name): Add a prototype and make it static.
(null_underflow): Mark parameter `pfile' with ATTRIBUTE_UNUSED.
(null_cleanup): Likewise for parameters `pbuf' and `pfile'.
(macro_cleanup): Likewise for parameter `pfile'.
(file_cleanup): Likewise.
* cpplib.h (cpp_reader_init, cpp_options_init, cpp_start_read,
cpp_read_check_assertion, skip_rest_of_line): Add prototypes.
* crtstuff.c (force_to_data, __CTOR_LIST__, force_to_data,
__DTOR_END__, __FRAME_END__): Mark with ATTRIBUTE_UNUSED.
* cse.c (cse_check_loop_start): Mark parameter `set' with
ATTRIBUTE_UNUSED.
* dbxout.c (flag_minimal_debug, have_used_extensions,
source_label_number): Move inside macro wrapper check against
defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO).
* dwarf2out.c (gen_entry_point_die): Hide prototype and definition.
* except.h (doing_eh): Provide prototype.
* expr.c: Move inclusion of expr.h to after insn-config.h.
* final.c: Include reload.h.
(shorten_branches): Cast the first argument of bzero to char *.
* fix-header.c (cpp_print_containing_files): Mark parameter
`pfile' with ATTRIBUTE_UNUSED.
(cpp_fatal): Likewise.
* flow.c (find_basic_blocks_1): Cast the first argument of bzero
to char *.
* genattrtab.c (make_length_attrs): Change the type of variable
`i' from int to size_t.
(zero_fn): Mark parameter `exp' with ATTRIBUTE_UNUSED.
(one_fn): Likewise.
* genextract.c (main): When generating insn-extract.c, mark
variable `junk' with ATTRIBUTE_UNUSED.
* gengenrtl.c (gencode): When generating genrtl.c, cast the first
argument of bzero to char*.
* integrate.c: Include toplev.h.
* libgcc2.c: Wrap `struct exception_table' and
`find_exception_handler' in macro DWARF2_UNWIND_INFO.
* objc/Make-lang.in (objc-act.o): Depend on toplev.h.
* objc/objc-act.c: Include toplev.h.
(lang_print_xnode): Mark parameters `file', `node' and `indent'
with ATTRIBUTE_UNUSED.
(finish_protocol): Likewise for parameter `protocol'.
* output.h (declare_weak): Add prototype.
(decode_reg_name): Don't wrap with TREE_CODE macro.
(assemble_alias): Add prototype.
* regclass.c: Include output.h.
* reload.h (reloads_conflict): Add prototype.
* rtl.h (print_rtl_single, mark_elimiation, reg_class_subset_p,
output_func_start_profiler): Add prototypes.
* rtlanal.c (reg_set_p_1): Mark parameters `x' and `pat' with
ATTRIBUTE_UNUSED.
* scan-decls.c: Include scan.h.
* scan.h (recognized_function, recognized_extern): Add prototypes.
* stmt.c: Include output.h.
* toplev.c (error_for_asm, warning_for_asm): Remove prototypes.
(output_lang_identify): Hide prototype and definition.
(float_signal): Mark parameter `signo' with ATTRIBUTE_UNUSED.
(pipe_closed): Likewise.
* toplev.h (count_error, strip_off_ending, error_for_asm,
warning_for_asm): Add prototypes.
From-SVN: r19712
* emit-rtl.c (gen_lowpart_common): Suppress last change if __complex__.
* emit-rtl.c (hard-reg-set.h): Include.
(get_lowpart_common): Don't make new REG for hard reg in a
class that cannot change size.
* Makefile.in (emit-rtl.o): Depend on hard-reg-set.h.
* combine.c: Revert previous patch.
Co-Authored-By: Richard Kenner <kenner@vlsi1.ultra.nyu.edu>
From-SVN: r18109
* combine.c (simplify_rtx): Obey CLASS_CANNOT_CHANGE_SIZE when
simplifying a subreg of a hard reg.
(expand_compound_operation): Likewise.
(force_to_mode): Likewise.
From-SVN: r18052
* rtl.c (read_rtx): Use atol/atoq based upon disposition of
HOST_WIDE_INT.
* genattrtab.c (write_test_expr): Use HOST_WIDE_INT_PRINT_DEC
as needed.
* genemit.c (gen_exp): Likewise.
* genpeep.c (match_rtx): Likewise.
* genrecog.c (write_tree_1): Likewise.
* c-lex.c (yyprint): Use proper format string based upon
disposition of HOST_BITS_PER_WIDE_INT.
(yylex): Put casts in right place for args to build_int_2.
* combine.c: Fix typos in Jan27 changes.
From-SVN: r17544
* c-lex.c: Include <stdlib.h> and <string.h>/<strings.h>. Add
prototype for `handle_sysv_pragma', and make it static. Add
parentheses around assignment used as truth value.
* combine.c (combine_instructions): Protect variable `prev' with
macro HAVE_cc0.
(can_combine_p): Protect variable `link' with AUTO_INC_DEC.
(extract_left_shift): Add parentheses around operand of &.
(merge_outer_ops): Avoid an empty body in an else-statement.
(gen_rtx_combine): Remove unused variable `i'.
* sparc/gmon-sol2.c: Include <fcntl.h>. Make return type of
function monstartup `void'. Likewise for internal_mcount. Add
`static void' prototype for moncontrol. Reconcile sprintf format
vs. args.
* sparc/sparc.c: Include <stdlib.h> and <string.h>/<strings.h>.
Make return type of function_arg_slotno explicitly `int'.
(reg_unused_after): Add parentheses around assignment used as
truth value.
(save_regs): Add explicit braces to avoid ambiguous `else'.
(function_arg_slotno): Add parentheses around && within ||.
(function_arg_pass_by_reference): Likewise.
(sparc_flat_output_function_prologue): Reconcile fprintf format
vs. args.
* svr4.h (ASM_OUTPUT_LIMITED_STRING): Add parentheses around
assignment used as truth value.
* cplus-dem.c: Include <stdlib.h>.
(demangle_signature): Avoid an empty body in an else-statement.
(do_type): Remove unused variable `lvl'.
* cppexp.c: Don't have <stdlib.h> depend on MULTIBYTE_CHARS.
Include <string.h>/<strings.h>.
(cpp_lex): Remove unused variable `namelen'.
(cpp_lex): Explicitly declare `num_chars' as an int.
* cpplib.c: Avoid duplicate inclusion of <stdlib.h>, include
<unistd.h> instead. Explicitly declare is_system_include
returning int.
(make_assertion): Remove unused variable `kt'.
(cpp_expand_to_buffer): Hide variable `obuf'.
(output_line_command): Remove unused variables, `line_end',
`line_cmd_buf' and `len'.
(macarg): Remove unused variable `arg_start'.
(special_symbol): Remove unused variable `i'. Add parentheses
around assignment used as truth value.
(do_include): Remove unused variables `pcfname' and `retried',
hide `pcf' and `pcfbuflimit'.
(do_line): Remove unused variable `i'.
(finclude): Hide variable `missing_newline'.
(cpp_handle_options): Remove unused variable `j'.
(read_token_list): Remove unused variable `eofp'.
(cpp_error_with_line): Remove unused variable `i'.
(cpp_warning_with_line): Likewise.
(cpp_pedwarn_with_line): Explicitly declare `column' as int.
(cpp_error_from_errno): Remove unused variable `i'.
* cse.c (invalidate): Add parentheses around assignment used as
truth value.
(find_best_addr): Move declaration of variable `our_cost' inside
the conditional macro where its used.
(fold_rtx): Avoid an empty body in an if-statement.
(cse_insn): Wrap variables `this_insn_cc0_mode' and
`this_insn_cc0' in macro HAVE_cc0.
* dwarf2out.c: Include <stdlib.h> and <string.h>/<string.h>.
(ASM_OUTPUT_DWARF_DATA8): Reconcile format vs. args in fprintf's.
(output_uleb128): Likewise.
(output_sleb128): Likewise.
(output_cfi): Likewise.
(output_call_frame_info): Remove unused variables `j', `fde_size'
and `fde_pad'.
(comp_unit_has_inlines): Hide declaration as per rest of file.
(size_of_line_prolog): Correct typo in prototype.
(add_arange): Likewise.
(output_aranges): Likewise.
(add_name_and_src_coords_attributes): Likewise.
(gen_array_type_die): Likewise.
(gen_inlined_subroutine_die): Likewise.
(equate_decl_number_to_die): Remove unused variable `i'.
(print_die): Reconcile format vs. args in fprintf's.
(print_dwarf_line_table): Likewise.
(output_die): Likewise.
(output_line_info): Likewise.
(add_subscript_info): Avoid an empty body in an else-statement.
(gen_subprogram_die): Remove unused variable `fp_loc'.
* dwarfout.c: Explicitly declare `next_pubname_number' as int.
Protect `ordering_attribute' prototype with USE_ORDERING_ATTRIBUTE
macro. Protect `src_coords_attribute' prototype with
DWARF_DECL_COORDINATES macro. Hide `output_entry_point_die'
prototype as in the rest of the file. Likewise for
`output_pointer_type_die' and `output_reference_type_die'. Remove
prototype for `type_of_for_scope'.
(output_unsigned_leb128): Reconcile format vs. args in fprintf.
(type_attribute): Add explicit braces to avoid ambiguous `else'.
* final.c: Include <stdlib.h> and <string.h>/<strings.h>.
(shorten_branches): Protect declaration of tmp_length with
SHORTEN_WITH_ADJUST_INSN_LENGTH and ADJUST_INSN_LENGTH macros.
(profile_function): Protect declaration of `sval' and `cxt'
variables with appropriate macros.
(final_scan_insn): Likewise for `note' variable. Add explicit
braces to avoid empty body in an if-statement.
(output_asm_insn): Move variable `i' inside macro conditional
where it is used. Add parentheses around assignment used as truth
value.
(asm_fprintf) Likewise, likewise.
* fix-header.c (main): Remove unused variable `done'. Protect
declaration of `i' with FIXPROTO_IGNORE_LIST.
* pexecute.c: Include <unistd.h>. Prototype `my_strerror'.
* print-rtl.c (print_inline_rtx): Explicitly declare the parameter
`ind'.
* profile.c: Include <string.h>/<strings.h>.
(instrument_arcs): Remove unused variables `note', `inverted',
`zero' and `neg_one'.
(branch_prob): Avoid empty body in an if-statement.
* regclass.c: Include <stdlib.h>.
(reg_alternate_class): Explicitly declare parameter `regno'.
* regmove.c (regmove_optimize): Remove unused variable `p'. Add
parentheses around assignment used as truth value.
(find_matches): Remove unused variables `output_operand' and
`matching_operand'.
(fixup_match_1): Remove statement with no effect: "if (0) ;".
* scan.c (sstring_append): Explicitly declare `count' as int.
(scan_string): Explicitly declare parameter `init' as int.
* sched.c: Include <stdlib.h>.
(BLOCKAGE_RANGE): Add parentheses around arithmetic in operand of |.
(rank_for_schedule): Add parentheses around assignment used as
truth value.
(schedule_block): Likewise.
(regno_use_in): Likewise.
(schedule_insns): Remove unused variable `i'.
* toplev.c: Include <stdlib.h> and <string.h>/<strings.h>.
(v_message_with_decl): Remove unused variable `n'.
(botch): Explicitly declare parameter `s' as char *.
(main): Add parentheses around assignment used as truth value.
* tree.c (make_node): Protect the variable `kind' with the
GATHER_STATISTICS macro.
(real_value_from_int_cst): Move variable `e' inside conditional
macro area where it is used.
(tree_last): Add parentheses around assignment used as truth value.
(build1): Protect the variable `kind' with the GATHER_STATISTICS
macro.
(print_obstack_statistics): Reconcile format vs. args in fprintf.
Protect variables `i', `total_nodes', and `total_bytes' with the
GATHER_STATISTICS macro.
Lots more -W -Wall warnings disappear.
From-SVN: r17516
* combine.c (force_to_mode, nonzero_bits): Correctly optimize
constant offset computations from objects with known alignment in
the presence of STACK_BIAS.
From-SVN: r17405
* combine.c (try_combine): When setting elim_i2, check whether newi2pat
sets i2dest. When calling distribute_notes for i3dest_killed, pass
elim_i2 and elim_i1. When setting elim_i1, check if newi2pat
sets i1dest.
From-SVN: r16334
* combine.c (try_combine): Don't elim_i1 when it is used in i2src.
* combine.c (try_combine): When setting elim_i2, check whether newi2pat
sets i2dest. When calling distribute_notes for i3dest_killed, pass
elim_i2 and elim_i1.
Co-Authored-By: Jim Wilson <wilson@cygnus.com>
From-SVN: r16296
* Makefile.in (OBJS): Add alias.o
(alias.o): Add dependencies.
* alias.c: New file.
* sched.c: Remove alias analysis code. It lives in alias.c now.
(reg_last_uses_size): Declare.
(sched_analyze_2): Add new arguments to true_dependence.
(sched_analyze_insn): Use reg_last_uses_size instead of max_reg.
(schedule_block): Initialize reg_last_uses_size.
(schedule_insns): Always call init_alias_analysis.
* calls.c (expand_call): Note calls to malloc, calloc, and realloc;
mark return value from such functions as a pointer and keep track of
them for alias analysis. If a return value from a function is a
pointer, mark it as such.
* combine.c (distribute_notes): Handle REG_NOALIAS.
* cse.c (struct write_data): Delete. No longer needed.
(invalidate): Don't call set_nonvarying_address_components anymore.
Use true_dependence to decide if an entry should be removed from
the hash table.
(invalidate_memory): Remove WRITES argument, simplify appropriately.
Fix all callers.
(note_mem_written): Similarly for WRITE_PTR argument.
(invalidate_from_clobbers): Similarly for W argument.
(invalidate_for_call): Remove memory elements from the hash table.
(refers_to_mem_p, cse_rtx_addr_varies_p): Deleted.
(cse_rtx_varies_p): New function. Derived from old
cse_rtx_addr_varies_p.
(cse_insn): Remove WRITES_MEMORY and INIT variables and all references.
Don't call note_mem_written anymore. Stack pushes invalidate the stack
pointer if PUSH_ROUNDING is defined. No longer need to call
cse_rtx_addr_varies_p to decide if a MEM should be invalidated.
(skipped_writes_memory): Remove variable.
(invalidate_skipped_set): Simplify and wewrite to use invalidate_memory.
(invalidate_skipped_block): Simplify for new alias analysis code.
(cse_set_around_loop): Likewise.
(cse_main): Call init_alias_analysis.
* flags.h (flag_alias_check, flag_argument_noalias): Declare.
* toplev.c (flag_alias_check, flag_argument_noalias): Define.
(f_options): Add new alias checking arguments.
(main): Set flag_alias_check when optimizing.
* local_alloc (validate_equiv_mem_from_store): Add new arguments
to true_dependence.
(memref_referenced_p): Likewise.
* loop.c (NUM_STORES): Increase to 30.
(prescan_loop): Only non-constant calls set unknown_address_altered.
(invariant_p): Add new arguments to true_dependence.
(record_giv): Initialize unrolled and shared fields.
(emit_iv_add_mult): Call record_base_value as needed.
* loop.h (struct induction): Add unrolled and shared fields.
* unroll.c (unroll_loop): Call record_base_value as needed.
(copy_loop_body): Likewise.
(final_biv_value): Likewise.
(final_giv_value): Likewise.
(find_splittable_regs): Likewise. Only create one new pseudo
if we have multiple address GIVs that were combined with the same
dst_reg GIV. Note when a new register is created due to unrolling.
* rtl.c (reg_note_name): Add REG_NOALIAS.
* rtl.h (enum reg_note): Similarly.
(rtx_varies_p, may_trap_p, side_effects_p): Declare.
(volatile_refs_p, volatile_insn_p, remove_note): Likewise.
(note_stores, refers_to_regno_p, reg_overlap_mentioned_p): Likewise.
(true_dependence, read_dependence, anti_dependence): Likewise.
(output_dependence, init_alias_analysis, end_alias_analysis): Likewise.
(mark_user_reg, mark_reg_pointer): Likewise.
jfc's alias analysis code.
From-SVN: r14768
(simplify_rtx): Don't do anything with if_then_else_cond
result if both one arm and the input are a comparison.
(simplify_{rtx,if_then_else,logical,shift_const}): Don't
test STORE_FLAG_VALUE with #if; properly test for just sign bit.
(num_sign_bit_copies, if_then_else_cond): Likewise.
From-SVN: r13551
(find_split_point, case SET): If SET_SRC is NE and
STORE_FLAG_VALUE is -1, see if we can convert into NEG of shift.
(force_to_mode, case NE): Make condition stricter.
From-SVN: r13370
(MAX_UNDO): Deleted macro.
(struct undo): New field, next.
(struct undobuf): Deleted num_undos and undo.
New fields undos, frees, and previous_undos.
(SUBST, SUBST_INT): Rework to allocate memory and chain undo entries.
(combine_instructions): Initialize undobuf.{undos,previous_undos},
not undobuf.num_undo and previous_num_undos.
(try_combine): Likewise.
(undo_all, gen_rtx_combine): Rework to use new data structures.
From-SVN: r12372
(expand_field_assignment): Take SUBREG_WORD into account when have
STRICT_LOW_PART.
(make_extraction): Make a STRICT_LOW_PART at any low-order word.
From-SVN: r11775
(combine_instructions): In initial scan of insns, handle a REG_INC
note's affect on sign bit copies and nonzero bits.
(set_nonzero_bits_and_sign_copies): Treat a zero SET arg as a CLOBBER.
From-SVN: r11762
(make_field_assignment): Use it.
Expand compound operations on both sides of an IOR.
Properly adjust constand in IOR when computing bit position.
From-SVN: r10927
(set_nonzero_bits_and_sign_copies): Handle reg even
if only set once and in one basic block.
(nonzero_bits, case REG): Use REGNO_POINTER_ALIGN instead of
explicit alignment of registers pointing into frame.
From-SVN: r10870
* regclass.c (regclass): Use SECONDARY_RELOAD_CLASS if it's
defined to avoid useless work.
* combine.c (find_split_point): Try to split SET_DEST
just like we do for SET_SRC.
From-SVN: r10790
(try_combine): When checking for two sets of the same register in a
split insn, also test for setting a ZERO_EXTRACT, STRICT_LOW_PART, or
SUBREG.
From-SVN: r10783
(simplify_rtx): In code that attempts to simplify conditional
expressions, if the result is an NE around another comparison, return
the original expression.
From-SVN: r10428
(simplify_and_const_int): Sign-extend constants when they have the
most significant bit set for the target.
(merge_outer_ops): Likewise.
(simplify_shift_const): Likewise.
From-SVN: r9310
(INSN_CUID): Call abort if INSN is out of range.
(combine_instructions): Set max_uid_cuid. Set uid_cuid directly
instead of through INSN_CUID.
(get_last_value): Use prev_real_insn instead of prev_nonnote_insn.
Ignore USE insns generated by combine.
From-SVN: r9169
(force_to_mode): OP_MODE must be MODE if MODE and mode of X are of different
classes.
(nonzero_bits, num_sign_bit_copies): Say nothing known for floating-point
modes.
From-SVN: r7688
* flow.c (mark_set_1): Record explicit hard registers in their raw mode.
(mark_used_regs): Likewise.
* combine.c (distribute_notes): Likewise.
From-SVN: r7670
Only exit quickly if X is narrower than MODE and MASK has all bits in X's
mode set.
(force_to_mode, case SUBREG): Don't check for WORD_REGISTER_OPERATIONS.
(force_to_mode, case NEG): Special-case test for low-order bit.
From-SVN: r7384
(simplify_set): Move call to make_field_assignment to end; if SRC or DEST is
a (clobber (const_int 0)), return it.
(force_to_mode): If X is a CALL, just return it.
From-SVN: r7323
(simplify_logical, case IOR): Convert back to PLUS if valid and it will
combine with another PLUS.
(extract_left_shift): New function.
(make_compound_operation, case ASHIFTRT): Simplify by calling it.
(force_to_mode): Don't ignore if X is a SUBREG.
(force_to_mode, case AND): Try to turn unchecked bits on instead of just off
and see which is cheaper.
From-SVN: r7224
(mark_used_regs_combine): New function.
(try_combine): Use them.
(reg_dead_at_p): Registers marked in newpat_used_regs must always be
considered to be live.
From-SVN: r6826
(distribute_links): Set it.
(if_then_else_cond): New function.
(try_combine): Return added_links_insn if it is earlier than what we would
otherwise return.
(subst): Generalize (OP X Y) to call if_then_else_cond instead of only
checking for an explicit IF_THEN_ELSE.
(subst, case IF_THEN_ELSE): When converting to a MULT, simplify the MULT
before putting it into OP.
(subst, case AND): Don't make IF_THEN_ELSE here; now made in generic case
earlier.
From-SVN: r6343
Set it for special case of substituting i3 into i2. Use it near
end to detect when special case succeeded. Move i2notes to
i3notes for this special case.
(distribute_notes, REG_UNUSED case): Ignore all REG_UNUSED notes
except those from I3.
From-SVN: r5639
(subst, force_to_mode, nonzero_bits, num_sign_bit_copies): Use new
macros LOAD_EXTEND_OP and WORD_REGISTER_OPERATION instead of
BYTE_LOADS_*_EXTEND and LOAD_EXTEND.
From-SVN: r5473
* combine.c: (combinable_i3_pat): Don't add REG_DEAD notes for
HARD_FRAME_POINTER_REGNUM.
(subst, case SUBREG): Don't change register number or mode if it
is HARD_FRAME_POINTER_REGNUM.
From-SVN: r5450
(combine_instructions): Use it.
(force_to_mode): Narrow mask to fit mode (except VOIDmode).
(record_value_for_reg): When zeroing reg_last_set_value, also
zero reg_last_set_{mode,nonzero_bits,sign_bit_copies}.
(record_dead_and_set_regs): Likewise.
From-SVN: r5430
(make_compound_operation): Handle the case
(and (xor/ior (lshift...) (lshift...)) ...).
(make_field_assignment): In get_pos_from_mask call, only invert
bits in mode mask.
From-SVN: r5237
(nonzero_bits): Fix reversed test for when we need to insert extra bits when
sizes differ.
(nonzero_bits, case EQ): Always return STORE_FLAG_VALUE when returning integer
mode; remove now-redundant test.
From-SVN: r5221
(subst): Instead, do it here, but also allow it in as a nested SUBREG since
the inner one will be eliminated.
(simplify_and_const_int): Convert (and (neg X) (const_int 1)) to a shift
when X is known to be either 0 or 1.
From-SVN: r5187
(try_combine): Don't split a PARALLEL of a SIGN_EXTEND and the object
being sign extended if we have made assumptions about the form the
I2DEST.
From-SVN: r5184
generalize appropriately.
Move most cases from simplify_and_const_int in.
(simplify_and_const_int): Remove most code from here; call force_to_mode
instead.
(subst, make_extraction, make_compound_operation): Change calls to
force_to_mode.
(make_field_assignment): Likewise.
(simplify_comparison): Add call to force_to_mode when doing a sign bit
comparison.
From-SVN: r5060
(subst): Move simple operations inside IF_THEN_ELSE if the IF_THEN_ELSE is in
the second operand as well as the first.
(subst, case NEG): Use plus_constant to make a PLUS.
(subst, case MINUS): Simplify (minus 1 (comparison foo bar)).
(subst, case EQ): Add a number of missing cases where comparisons may be
replaced with arithmetic or logical ops.
(subst, case IF_THEN_ELSE): Handle (if_then_else COND (OP Z C1) Z) in a more
general manner.
(simplify_and_const_int): Make AND with gen_binary in case we can simplify it.
From-SVN: r5056
(this_basic_block): New variable.
(combine_instructions): Set it.
(try_combine, distribute_links): Use it and basic_block_head to see if
we've gone to a new basic block instead of trying to reproduce
calculation done in flow.
From-SVN: r5044
(subst, case IF_THEN_ELSE): Add missing arg to make_compound_operation.
(make_compound_operation, case ASHIFTRT): Delete extra gen_unary arg.
From-SVN: r4945
(subst, case IF_THEN_ELSE): Make a shift when appropriate.
(simplify_shift_const): If we have an outer operation and made a shift, see if
it can be simplified.
From-SVN: r4748
(set_nonzero_bits_and_sign_copies, nonzero_bits): If we have a
positive constant that is negative in the mode it is being used in,
treat it as negative.
From-SVN: r4506
(set_nonzero_bits_and_sign_copies): Don't record data for a a pseudo that is
undefined on entry to a function.
When a pseudo is clobbered, show we don't know anything about it.
From-SVN: r4471
Clean up code so more readable and don't restrict to case where C2 >= C1.
Pass correct (inner) code to recursive call.
(make_compound_operation, case SUBREG): Pass the code of our operand
to recursive call, not SUBREG, and make another recursive call after
calling force_to_mode.
From-SVN: r4082
(reg_nonzero_bits): Should be unsigned.
(reg_last_set_{mode,nonzero_bits,sign_bit_copies}): New variables.
(combine_instructions): Allocate and initialized them.
(nonzero_bits, num_sign_bit_copies, case REG): Use new variables to get
information on regs we've seen before.
(record_value_for_reg): Set new variables for register being modified.
(record_dead_and_set_regs): Invalidate regs clobbered by CALL_INSN.
From-SVN: r4051
(simplify_comparison, case PLUS): Generalize simplification
of (eq (plus A B) C).
(simplify_comparison, case MINUS): Add corresponding cases.
From-SVN: r3992
(record_dead_and_set_regs): Record death of all hard regs when a multi-reg
object in hard regs dies.
(move_deaths): Handle the case when we only have to move part of a
multi-register death note.
From-SVN: r3930
(make_compound_operation): Call recursively in the cases where we find a
simplification.
(make_compound_operation, case SUBREG): If the recursive call changes the rtx
code and this is an appropriate SUBREG, use force_to_mode.
From-SVN: r3800
(subst, case NOT): If STORE_FLAG_VALUE==-1, treat an ASHIFTRT of just the
sign bit as if it were an LT.
(subst, case XOR): Likewise for STORE_FLAG_VALUE==1 and an LSHIFTRT.
(simplify_and_const_int, case LSHIFTRT): If shifting a sign bit copy,
start shift at the sign bit.
(simplify_shift_const): Likewise for ASHIFTRT.
(BYTE_LOADS_EXTEND): Fix typo when defining.
(setup_incoming_promotions): Set modes properly.
From-SVN: r3575
set things up so that we can call get_last value; call
record_dead_and_set_regs in loop.
(set_nonzero_bits_and_sign_copies): Handle paradoxical SET.
From-SVN: r3444
(make_extraction): Don't use POS < 0 as a flag that POS_RTX is to be
used; instead use POS_RTX unless it is nonzero. If POS_RTX is a
constant, set POS and clear POS_RTX.
(make_compound_operation, make_field_assignment): Pass 0 for POS
instead of -1 when POS_RTX is nonzero.
From-SVN: r3178
(subst, simplify_and_const_int, nonzero_bits, num_sign_bit_copies): Use them.
(subst, case SET): Make a SIGN_EXTEND instead of paradoxical SUBREG if
BYTE_LOADS_SIGN_EXTEND; previously only made ZERO_EXTEND.
From-SVN: r3160
Rename references to `significant' bits to be `nonzero' bits;
specifically the following, but also local vars and comments:
(reg_nonzero_bits): Renamed from reg_significant.
(nonzero_bits): Renamed from significant_bits.
(nonzero_sign_valid): Renamed from significant_valid.
(set_nonzero_bits_and_sign_copies): Renamed from set_significant.
From-SVN: r2975
(subst, make_field_assignment, num_sign_bit_copies): Protect calls to
significant_bits; unless we only care if the result is a power of two,
don't call if mode size is wider than HOST_BITS_PER_WIDE_INT.
(extended_count, simplify_shift_const, simplify_comparison): Likewise.
From-SVN: r2824
(subst, simplify_and_const_int, significant_bits): Treat
BYTE_LOADS_SIGN_EXTEND just like BYTE_LOADS_ZERO_EXTEND.
(num_sign_bit_copies, case MEM): New case for BYTE_LOADS_SIGN_EXTEND.
(num_sign_bit_copies, case SUBREG): Handle just like significant_bits.
From-SVN: r2189
Likewise, when making new REG_DEAD notes for distribute_notes.
(remove_death, move_deaths): Update reg_n_deaths.
(distribute_notes): When placing second REG_DEAD or REG_UNUSED note or
ignoring such a note, update reg_n_deaths.
(simplify_comparison, case ASHIFT): Fix typo.
(try_combine): The insns made by a DEFINE_SPLIT might contain a PARALLEL and
the call to recog_for_combine might add it.
(combine_instructions): Clear significant_valid at end of combine pass for
a function.
(find_split_point, case MEM): See if first operand of the PLUS that makes
up an address is complex.
(subst): Add missing arg to recursive calls when IF_THEN_ELSE is an arg
of an operator.
(subst, case IF_THEN_ELSE): Generalize code to propagate comparison result
into arms by using known_cond.
If an arm is the first operand of the comparison, make it the true arm.
Remove unneeded comparison when arms are identical.
Try to convert IF_THEN_ELSE to ABS, (neg (abs X)), [US]MIN, [US]MAX.
Convert (if_then_else (ne A 0) (OP X C) X) to (OP X (mult A C)).
(subst, case SET): If we don't have conditional moves, convert IF_THEN_ELSE
into logical operations.
(subst, case AND): Always make conditional moves, even if we don't support
them on the machine.
(known_cond, extended_count): New functions.
(gen_binary): For commutative operations, put constant last.
From-SVN: r2182
(make_compound_operation, case ASHIFTRT): Add new code to
handle (ashiftrt (neg (ashift FOO C1) C2)) just like we currently
handle (ashiftrt (OP (ashiftrt FOO C1) C2) C2).
From-SVN: r2028
comparison in a wider mode.
(distribute_notes, REG_EQUAL): Don't put back a note with a
non-constant expression since it may no longer be valid.
From-SVN: r1894
(combine_instructions): Initialize it.
(set_significant): Set it.
(try_combine): Set subst_low_cuid immediately before calling `subst' to
the INSN_CUID of the lowest insn involved in the call. Change XOR with
out-of-range constant to (not (xor ...)).
Call both split_insns and find_split_point; pass extra parm to
find_split_point.
Record I2DEST's value if I2 now sets it; similarly for I1DEST.
(find_split_point): Add new arg INSN.
If AND'ing with a large single-bit constant and we only care about
equality with zero, replace with bit extraction.
Make two shifts for ZERO_EXTRACTs unless very narrow.
(subst): Move RESTART label earlier.
If we have a simple operation applied to IF_THEN_ELSE, move the operation
inside the two arms.
(subst, case SUBREG): Use force_to_mode.
(subst, case NOT): Change (not (xor X C)) to (xor X ~C).
(subst, case NEG): Remove (neg (abs X)); redundant.
Convert (neg (xor A 1)) to (plus A -1) if A is known to be 0 or 1.
(subst, case IF_THEN_ELSE): Simplify if an arm contains a register being
tested by substiting the known value.
Put constant integer in last arm if can reverse comparison.
(subst, case SET): Use gen_lowpart_for_combine.
(subst, case AND): Make IF_THEN_ELSE when appropriate.
(subst, case IOR): (ior A C) can sometimes be just C.
(subst, case XOR): Go back and restart when canonicalizing.
(subst, case ABS): Use num_sign_bit_copies.
(make_extraction): Call force_to_mode.
(make_compound_operation): Look at optabs rather that explicitly checking
for operations and assuming we have SImode.
Handle (ashiftrt (OP (ashift foo C1) C3) C2).
(force_to_mode): Only change mode of arithmetic if optab says we have
operation in that mode.
Remove unneeded ASHIFTRT; add handling for IF_THEN_ELSE.
(significant_bits, case NEG): Call num_sign_bit_copies.
(significant_bits, case ABS, case [US]{MIN,MAX}, IF_THEN_ELSE): New.
(num_sign_bit_copies): New function.
(simplify_shift_const): Remove ASHIFTRT if value is known -1 or 0.
Use num_sign_bit_copies to simplify (ashiftrt (ashift ...) ...)
and (ashiftrt (neg ...) ...).
Remove now redundant case when VAROP is a PLUS.
(simplify_comparison): If A is known to be -1 or 0, A != -1 is A == 0.
Simplify unsigned tests that really check the sign bit.
(simplify_comparison, case ASHIFTRT): Convert to LSHIFTRT if equality
comparison with zero.
(get_last_value): Check if the desired register is set in the
insn before the one whose INSN_CUID is subst_low_cuid.
From-SVN: r1746
