[Bug target/30961] [4.1/4.2/4.3 regression] redundant reg/mem stores/moves

["pluto at agmk dot net" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #31 from pluto at agmk dot net  2007-08-08 21:50 -------
r84072 introduces an extra movq regression:

+2004-07-04  Richard Henderson  <rth@redhat.com>
+
+       * rtl.def (ADDRESSOF): Remove.
+       * alias.c (rtx_equal_for_memref_p): Don't handle addressof.
+       (find_base_term, memrefs_conflict_p): Likewise.
+       * cse.c (fixed_base_plus_p, find_best_addr: Likewise.
+       (fold_rtx, cse_insn, set_live_p): Likewise.
+       * dwarf2out.c (mem_loc_descriptor): Likewise.
+       (add_location_or_const_value_attribute): Likewise.
+       * emit-rtl.c (copy_insn_1): Likewise.
+       * explow.c (memory_address): Likewise.
+       * expmed.c (store_split_bit_field): Likewise.
+       * expr.c (expand_expr_real_1): Likewise.
+       * function.c (instantiate_decl
+       (instantiate_virtual_regs_1, fix_lexical_addr): Likewise.
+       * genrecog.c (preds, validate_pattern): Likewise.
+       * integrate.c (copy_rtx_and_substitute): Likewise.
+       * recog.c (general_operand, register_operand): Likewise.
+       (memory_address_p): Likwise.
+       * reload1.c (eliminate_regs, elimination_effects): Likewise.
+       * rtl.c (copy_rtx): Likewise.
+       * rtlanal.c (rtx_unstable_p, rtx_varies_p): Likewise.
+       (rtx_addr_can_trap_p, nonzero_address_p, address_cost): Likewise.
+       * rtlhooks.c (gen_lowpart_general): Likewise.
+       * stmt.c (expand_asm_operands): Likewise.
+       * web.c (entry_register, replace_ref, web_main): Likewise.
+       * config/alpha/alpha.c (input_operand, alpha_legitimate_address_p,
+       alpha_expand_block_move, alpha_expand_block_clear): Likewise.
+       * config/arm/arm.c (thumb_rtx_costs): Likewise.
+       * config/c4x/c4x.c (c4x_valid_operands): Likewise.
+       * config/frv/frv.c (move_destination_operand, move_source_operand,
+       condexec_dest_operand, condexec_source_operand,
+       condexec_memory_operand): Likewise.
+       * config/h8300/h8300.h (PREDICATE_CODES): Likewise.
+       * config/ia64/ia64.c (general_xfmode_operand): Likewise.
+       (destination_xfmode_operand): Likewise.
+       * config/mips/mips.h (PREDICATE_CODES): Likewise.
+       * config/mn10300/mn10300.c (mn10300_address_cost_1): Likewise.
+       * config/s390/s390.c (general_s_operand): Likewise.
+       * config/s390/s390.md (mov*): Likewise.
+       * config/sparc/sparc.h (PREDICATE_CODES): Likewise.
+
+       * c-typeck.c (c_mark_addressable): Don't put_var_into_stack.
+       * expr.c (expand_expr_real_1): Likewise.
+       * stmt.c (expand_decl): Likewise.
+       * config/c4x/c4x.c (c4x_expand_builtin): Likewise.
+
+       * function.c (struct fixup_replacement, struct insns_for_mem_entry,
+       postponed_insns, put_var_into_stack, put_reg_into_stack,
+       schedule_fixup_var_refs, fixup_var_refs, find_fixup_replacement,
+       fixup_var_refs_insns, fixup_var_refs_insns_with_hash,
+       fixup_var_refs_insn, fixup_var_refs_1, fixup_memory_subreg,
+       walk_fixup_memory_subreg, fixup_stack_1, optimize_bit_field,
+       gen_mem_addressof, flush_addressof, put_addressof_into_stack,
+       purge_bitfield_addressof_replacements, purge_addressof_replacements,
+       purge_addressof_1, insns_for_mem_hash, insns_for_mem_comp,
+       struct insns_for_mem_walk_info, insns_for_mem_walk,
+       compute_insns_for_mem, is_addressof, purge_addressof, setjmp_protect,
+       setjmp_protect_args): Remove.
+       (push_function_context_to): Don't handle var_refs_queue.
+       (pop_function_context_from, free_after_compilation): Likewise.
+       (instantiate_virtual_regs): Don't handle parm_reg_stack_loc.
+       (assign_parms, allocate_struct_function): Likewise.
+       (use_register_for_decl): New.
+       (expand_function_end): Don't setjmp_protect.
+       * function.h (struct emit_status): Update commentary.
+       (struct function): Remove x_max_parm_reg, x_parm_reg_stack_loc.
+       (max_parm_reg, parm_reg_stack_loc): Remove.
+       * passes.c (DFI_addressof): Remove.
+       (dump_file_info): Remove addressof.
+       (rest_of_handle_addressof): Remove.
+       (rest_of_compilation): Don't call it.
+       * rtl.h (ADDRESSOF_REGNO, ADDRESSOF_DECL): Remove.
+       * stmt.c (expand_decl): Use use_register_for_decl.
+       * tree.h: Update decls.
+       * web.c (mark_addressof): Remove.
+       * doc/invoke.texi (-dF): Remove.
+


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30961