[Bug tree-optimization/18800] [4.0 Regression] ivopt missed

["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  2004-12-18 20:23 -------
Subject: Bug 18800

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	rakdver@gcc.gnu.org	2004-12-18 20:22:54

Modified files:
	gcc            : ChangeLog params.def tree-ssa-loop-ivopts.c 
	gcc/doc        : invoke.texi 

Log message:
	PR tree-optimization/18800
	* params.def (PARAM_IV_ALWAYS_PRUNE_CAND_SET_BOUND): New parameter.
	* tree-ssa-loop-ivopts.c (struct iv_ca): Add n_cands field.
	(ALWAYS_PRUNE_CAND_SET_BOUND): New macro.
	(iv_ca_set_no_cp, iv_ca_set_cp, iv_ca_new): Update n_cands field.
	(iv_ca_delta_join, iv_ca_delta_reverse, iv_ca_n_cands, iv_ca_prune):
	New functions.
	(iv_ca_extend): Return number of candidates in the set.
	(try_add_cand_for): Add argument to iv_ca_extend calls.
	(try_improve_iv_set): Use iv_ca_prune.
	* doc/invoke.texi (iv-always-prune-cand-set-bound): Document.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.6882&r2=2.6883
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/params.def.diff?cvsroot=gcc&r1=1.50&r2=1.51
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-ssa-loop-ivopts.c.diff?cvsroot=gcc&r1=2.35&r2=2.36
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/doc/invoke.texi.diff?cvsroot=gcc&r1=1.561&r2=1.562



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18800