[Bug middle-end/17503] quadratic behaviour in invalid_mode_change_p

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

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2004-12-04 00:37 -------
Subject: Bug 17503

CVSROOT:	/cvs/gcc
Module name:	gcc
Branch: 	gcc-3_3-branch
Changes by:	rth@gcc.gnu.org	2004-12-04 00:36:41

Modified files:
	gcc            : ChangeLog combine.c flow.c regclass.c regs.h 
	                 rtl.h 

Log message:
	PR rtl-opt/17503
	* regclass.c (subregs_of_mode): Turn into an htab.  Make static.
	(som_hash, som_eq): New.
	(init_subregs_of_mode, record_subregs_of_mode): New.
	(cannot_change_mode_set_regs): Rewrite for htab implementation.
	(invalid_mode_change_p): Likewise.
	* combine.c (gen_lowpart_for_combine): Use record_subregs_of_mode.
	* flow.c (mark_used_regs): Likewise.
	(life_analysis): Use init_subregs_of_mode.
	* regs.h (subregs_of_mode): Remove.
	* rtl.h (init_subregs_of_mode, record_subregs_of_mode): Declare.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.16114.2.1031&r2=1.16114.2.1032
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/combine.c.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.325.2.17&r2=1.325.2.18
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/flow.c.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.541.2.6&r2=1.541.2.7
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/regclass.c.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.160.4.7&r2=1.160.4.8
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/regs.h.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.26.4.2&r2=1.26.4.3
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/rtl.h.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.375.2.8&r2=1.375.2.9



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17503