[Bug rtl-optimization/20211] autoincrement generation is poor

["cvs-commit at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2005-09-19 16:54 -------
Subject: Bug 20211

CVSROOT:	/cvs/gcc
Module name:	gcc
Branch: 	sh-elf-4_1-branch
Changes by:	amylaar@gcc.gnu.org	2005-09-19 16:54:05

Modified files:
	gcc            : ChangeLog common.opt optabs.c opts.c regmove.c 

Log message:
	2005-09-19  J"orn Rennecke <joern.rennecke@st.com>
	Bernd Schmidt  <bernds@redhat.com>
	
	PR rtl-optimization/20211
	* common.opt: Add optimize-related-values entry.
	* opts.c (decode_options): Set flag_optimize_related_values.
	* optabs.c (gen_add3_insn): If direct addition is not possible,
	try to move the constant into the destination register first.
	* regmove.c (obstack.h, ggc.h, optabs.h): Include.
	(related, rel_use_chain, rel_mod, rel_use): New structures.
	(related_baseinfo, update): Likewise.
	(lookup_related, rel_build_chain): New functions.
	(recognize_related_for_insn, record_reg_use, create_rel_use): Likewise.
	(new_reg_use, rel_record_mem, new_base, invalidate_related): Likewise.
	(find_related, find_related_toplev, chain_starts_earlier): Likewise.
	(chain_ends_later, mod_before, remove_setting_insns): Likewise.
	(perform_addition, modify_address): Likewise.
	(optimize_related_values_1, optimize_related_values_0): Likewise.
	(optimize_related_values, count_sets, link_chains): Likewise.
	(init_add_limits): Likewise.
	(REL_USE_HASH_SIZE, REL_USE_HASH, rel_alloc, rel_new): New macros.
	(regno_related, rel_base_list, unrelatedly_used): New variables.
	(related_obstack, add_limits): Likewise.
	(regmove_optimize): Call optimize_related_values.
	Include gt-regmove.h.
	(have_3addr_const_add): New variable.
	* Makefile.in (gt-regmove.h): New rule.
	(regmove.o): Depend on $(OPTABS_H) and gt-regmove.h.
	(GTFILES): Add regmove.c.
	* doc/invoke.texi: Document -foptimize-related-values.
	
	2005-09-19  J"orn Rennecke <joern.rennecke@st.com>
	
	* regmove.c (discover_flags_reg): Use the PATTERN of an INSN.
	
	* regmove.c (fixup_match_1): When moving a death note, check if
	it needs changing into a REG_UNUSED note.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&only_with_tag=sh-elf-4_1-branch&r1=2.8142.2.30&r2=2.8142.2.31
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/common.opt.diff?cvsroot=gcc&only_with_tag=sh-elf-4_1-branch&r1=1.66.2.3&r2=1.66.2.4
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/optabs.c.diff?cvsroot=gcc&only_with_tag=sh-elf-4_1-branch&r1=1.268.2.4&r2=1.268.2.5
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/opts.c.diff?cvsroot=gcc&only_with_tag=sh-elf-4_1-branch&r1=1.99.2.3&r2=1.99.2.4
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/regmove.c.diff?cvsroot=gcc&only_with_tag=sh-elf-4_1-branch&r1=1.166.18.2&r2=1.166.18.3



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20211