[Bug rtl-optimization/15242] [3.3/3.4/4.0 regression] pessimization of "goto *"

["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  2005-02-01 10:03 -------
Subject: Bug 15242

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	steven@gcc.gnu.org	2005-02-01 10:03:27

Modified files:
	gcc            : ChangeLog basic-block.h bb-reorder.c 
	                 cfgcleanup.c params.def passes.c 
	gcc/doc        : invoke.texi 

Log message:
	PR optimization/15242
	* params.def (PARAM_MAX_GOTO_DUPLICATION_INSNS): New param.
	* basic-block.h (duplicate_computed_gotos): Add prototype.
	* bb-reorder.c (duplicate_computed_gotos): New function to
	duplicate sufficiently small blocks ending in a computed jump.
	* passes.c (rest_of_compilation): Call duplicate_computed_gotos
	if not optimizing for size.
	* cfgcleanup.c (try_crossjump_bb): If not optimizing for size,
	never do tail merging for blocks ending in a computed jump.
	* doc/invoke.texi: Document the max-goto-duplication-insns param.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.7359&r2=2.7360
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/basic-block.h.diff?cvsroot=gcc&r1=1.236&r2=1.237
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/bb-reorder.c.diff?cvsroot=gcc&r1=1.88&r2=1.89
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cfgcleanup.c.diff?cvsroot=gcc&r1=1.138&r2=1.139
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/params.def.diff?cvsroot=gcc&r1=1.53&r2=1.54
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/passes.c.diff?cvsroot=gcc&r1=2.64&r2=2.65
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/doc/invoke.texi.diff?cvsroot=gcc&r1=1.571&r2=1.572



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15242