* calls.c (emit_call_1): Mark parameter `stack_size' with
	ATTRIBUTE_UNUSED.
	(expand_call): Initialize variable `insn'.
	(emit_library_call): Likewise for variable `high_to_save'.
	(emit_library_call_value): Likewise.
	(store_one_arg): Likewise for variables `lower_bound' and
	`upper_bound'.

	* combine.c (try_combine): Likewise for variables `i2_code_number'
	and `other_code_number'.
	(find_split_point): Likewise for variables `pos', `unsignedp' and
	`inner'.
	(simplify_if_then_else): Likewise for variables `op' and `c1'.
	(simplify_and_const_int): Remove unused variable `width'.
	(merge_outer_ops): Likewise.

	* cse.c (simplify_binary_operation): Cast an INTVAL() to `unsigned
	HOST_WIDE_INT' when comparing against one.
	(simplify_relational_operation): Likewise.
	(cse_insn): Initialize variables `src_eqv_volatile',
	`src_eqv_in_memory', `src_eqv_in_struct', `src_eqv_hash' and `sets'.

	* final.c (init_final): Constify parameter `filename'.
	(final_start_function): Mark parameter `optimize' with
	ATTRIBUTE_UNUSED.
	(profile_function): Likewise for parameters `first' and `optimize'.
	(output_source_line): Likewise for parameter `file'.

	* integrate.c (subst_constants): Cast a value to `size_t' when
	comparing against one.
	(mark_stores): Initialize variable `mode'.  Cast a value to
	`size_t' when comparing against one.

	* integrate.h (MAYBE_EXTEND_CONST_EQUIV_VARRAY): Likewise.

	* loop.c (move_movables): Initialize variable `first'.
	(strength_reduce): Likewise for variable `increment'.
	(check_dbra_loop): Likewise for variable `comparison_val'.  Cast a
	value to `size_t' when comparing against one.
	(load_mems): Initialize variable `end_label'.

	* output.h (init_final): Constify parameter.

	* reload.c (decompose): Initialize variable `base'.

	* reload1.c (reload): Likewise for variable `is_scalar'.
	(spill_hard_reg): Mark parameter `dumpfile' with ATTRIBUTE_UNUSED.
	(choose_reload_regs): Initialize variable `mode'.
	(emit_reload_insns): Likewise for variable `store_insn'.
	(reload_cse_noop_set_p): Mark parameter `insn' with
	ATTRIBUTE_UNUSED.
	(reload_combine): Initialize variable `set'.

	* unroll.c (unroll_loop): Likewise for variable `local_label'.
	(copy_loop_body): Cast a value to `size_t' when comparing against
	one.

	* varasm.c (assemble_variable): Initialize variable `size_tree'.
	(const_hash): Add an `else abort()' in an if-else-if-else sequence.
	(remove_from_pending_weak_list): Mark parameter `name' with
	ATTRIBUTE_UNUSED.

From-SVN: r28860

	* cplus-dem.c (gnu_special): Cast a `size_t' to `long' when
	comparing against a signed quantity.
	(arm_special): Likewise.
	(demangle_fund_type): Likewise.
	(do_hpacc_template_const_value): Mark parameter `work' with
	ATTRIBUTE_UNUSED.
	(main): Constify variable `valid_symbols'.

From-SVN: r28859

From-SVN: r28858

From-SVN: r28857

* decl2.c (handle_class_head): Be graceful about additional
scope qualifiers. Adjust comments to reflect reality.

From-SVN: r28856

From-SVN: r28855

From-SVN: r28854

From-SVN: r28853

From-SVN: r28852

From-SVN: r28851

From-SVN: r28850

From-SVN: r28849

From-SVN: r28848

From-SVN: r28847

	* calls.c (emit_call_1): Use call_pop/call_value_pop for all values
	of n_popped when call/call_value are not defined.

From-SVN: r28846

From-SVN: r28845

        * tm.texi: GNU CC -> GCC conversion.
        (CC1_SPEC): Indicate it is used for all language front ends.

From-SVN: r28844

From-SVN: r28843

        * config-ml.in: Pass compiler flag corresponding to multidirs to
        subdir configures.

From-SVN: r28842

loop.c (strength_reduce): Automatically unroll loops if the unrolled loop size is smaller than the rolled...

        * loop.c (strength_reduce): Automatically unroll loops if the
        unrolled loop size is smaller than the rolled loop size.

Co-Authored-By: Jeffrey A Law <law@cygnus.com>

From-SVN: r28841

	* flow.c (delete_block): Spell NOTE_INSN_EH_REGION_BEG and
	NOTE_INSN_EH_REGION_END correctly.

From-SVN: r28840

loop.c (insert_bct): Replace use of sdiv_optab with asr_optab and delete comment that code should be...

        * loop.c (insert_bct): Replace use of sdiv_optab with asr_optab
        and delete comment that code should be rewritten.

From-SVN: r28839

        * haifa-sched.c (find_rgns): Mark a block found during the DFS search
        as reachable.

From-SVN: r28838

From-SVN: r28837

        * fixinc/mkfixinc.sh: Don't fix uwin headers.
        * i386/uwin.h (MD_STARTFILE_PREFIX): Define.
        (LINK_SPEC): Add -u _main when building executables.
        (ASM_DECLARE_FUNCTION): Update from Cygwin.
        (ASM_FILE_END): Use the default for ix86-pe.
        * i386/xm-uwin.h (HAVE_BCOPY): Undefine.

From-SVN: r28836

        * gcse.c (find_avail_set): Follow chains of register-register copies.
        Use oprs_not_set_p to guarantee that the returned value can be
        substituted.
        (cprop_insn): Don't verify the return value of find_avail_set with
        oprs_not_set_p.

From-SVN: r28835

        * gcse.c (cprop_jump): New function, broken out of cprop_insn.
        (cprop_cc0_jump): New function.
        (cprop_insn): Break out new function cprop_jump and use it.
        Also use cprop_cc0_jump for machines with CC0.
        (cprop): Don't crash if cprop_insn turned the insn into a NOTE.

From-SVN: r28834

final.c (output_addr_const): Handle case where ASM_OPEN_PAREN and ASM_CLOSE_PAREN are empty strings.

        * final.c (output_addr_const): Handle case where ASM_OPEN_PAREN
        and ASM_CLOSE_PAREN are empty strings.

From-SVN: r28833

* Makefile.in (PREPROCESSOR_DEFINES): New macro.
(protoize.o):  Use PREPROCESSOR_DEFINES and DRIVER_DEFINES.
(unprotoize.o): Ditto.
(test-protoize-simple): Don't define STD_PROTO_DIR.
* protoize.c: Use PARAMS rather than PROTO.  Minor whitespace
changes to make 'test-protoize-simple' pass.
(STD_PROTO_DIR): Remove define.
(STANDARD_EXEC_PREFIX): Supply default define.
(standard_exec_prefix): New variable, init to STANDARD_EXEC_PREFIX.
(target_machine): New variable, init to DEFAULT_TARGET_MACHINE.
(target_version): New variable, init to DEFAULT_TARGET_VERSION.
(GET_ENV_PATH_LIST): New macro.
(default_syscalls_dir): No longer initialized to STD_PROTO_DIR.
(do_processing): Initialize default_syscalls_dir using new
macros.  Use it to initialize syscalls_absolute_filename.

Co-Authored-By: Geoff Keating <geoffk@cygnus.com>

From-SVN: r28832

From-SVN: r28831

jump.c (jump_optimize_1): Do cmov opt on any single-set; force B into a register before emit_conditional_move.

        * jump.c (jump_optimize_1): Do cmov opt on any single-set; force
        B into a register before emit_conditional_move.

From-SVN: r28830

        * fold-const.c (fold): Reassociate (+ (+ (* a b) c) (* d e))
        as (+ (+ (* a b) (* d e)) c).  Factor a common power-of-two
        multiplicand out of (+ (* a b) (* c d)).

From-SVN: r28829

        * haifa-sched.c (split_hard_reg_notes): Move to flow.c
        (new_insn_dead_notes): Likewise.
        (update_n_sets): Likewise.
        (update_flow_info): Move to flow.c, renamed to update_life_info;
        extend to handle multiple source insns.
        * flow.c: Include resource.h
        (unlink_insn_chain): New.
        (split_hard_reg_notes): New.
        (maybe_add_dead_note): New.
        (maybe_add_dead_note_use): New.
        (find_insn_with_note): New.
        (new_insn_dead_notes): New.
        (update_n_sets): New.
        (sets_reg_or_subreg_1, sets_reg_or_subreg): New.
        (maybe_remove_dead_notes): New.
        (update_life_info): New.
        (prepend_reg_notes): New.
        (replace_insns): New.
        * output.h (update_life_info): Declare.
        * recog.c (split_block_insns): Use update_life_info.
        * resource.c (find_free_register): Use reg_alloc_order, don't use
        fixed regs, make sure the mode is supported, don't use new regs.
        (reg_dead_p): New.
        * rtl.h (replace_insns): Declare.

Co-Authored-By: Richard Henderson <rth@cygnus.com>

From-SVN: r28828

From-SVN: r28827

	* call.c (build_conditional_expr): Fix typo.
	* typeck.c (build_modify_expr, COND_EXPR): Make sure we've got an
	lvalue before trying to mess with the sides.

	* error.c (dump_expr, CONVERT_EXPR): Handle (void) properly.

From-SVN: r28826

	* expr.c (expand_expr): Cope with COND_EXPRs with one
	non-returning branch.

From-SVN: r28825

	* expr.c (store_expr): Always pass down the target, even when not
	doing CSE.

From-SVN: r28824

From-SVN: r28823

	* genattr.c (function_unit_desc): Constify a char*.  Add prototype.
	(main): Add prototypes.

	* genattrtab.c (substitute_address, write_const_num_delay_slots,
	attr_eq, attr_numeral, attr_equal_p, attr_copy_rtx): Prototype.
	(write_attr_get): Emit prototypes along with function definition.
	(write_eligible_delay): Mark a parameter with ATTRIBUTE_UNUSED.
	(write_complex_function): Emit static prototype along with
	function definition.

	* genemit.c (gen_split): Emit prototypes along with function
	definition.

	* genoutput.c (output_epilogue): Add prototype to `insn_outfun'.
	Likewise for predicates and `insn_operand_predicate'.
	(process_template): Emit static prototype along with function
	definition.

	* genrecog.c (make_insn_sequence): Constify a char*.  Add
	prototypes for get_split_*().
	(write_subroutine): Emit prototypes along with function
	definition.

From-SVN: r28822

        * noncompile/noncompile.exp: Load_lib c-torture.exp.
        (postbase_with_opts): New proc to loop over TORTURE_OPTIONS and
        call `postbase' for each one.  All callers of `postbase' changed
        to call this instead.

From-SVN: r28821