[Bug optimization/12322] [3.4 Regression] [gcse-lm] Significant slowdown when compiling computed-goto code in Parrot, GCSE is slower

["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  2003-12-02 01:39 -------
Subject: Bug 12322

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	sayle@gcc.gnu.org	2003-12-02 01:39:20

Modified files:
	gcc            : ChangeLog gcse.c 

Log message:
	PR optimization/12322
	* gcse.c (struct ls_expr): Change type of hash_index from int to
	unsigned int.
	(hash_expr): Document hash_table_size parameter and wrap long line.
	(ldst_entry): Calculate expression's hash_index and record in ptr.
	(trim_ld_motion_mems): Use hash_index to search a single bucket
	instead of scanning the entire hash_table.  Remove the "del" local
	variable and use the equivalent "expr == 0" instead.  Change last
	to be a pointer to the pointer to the current element, to simplify
	and speed-up deleting from a linked list.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.1887&r2=2.1888
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/gcse.c.diff?cvsroot=gcc&r1=1.278&r2=1.279



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12322