[Bug tree-optimization/14796] [tree-ssa] combine two shifts into one

Mon Jun 13 00:18:00 GMT 2005

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2005-06-13 00:18 -------
Subject: Bug 14796

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	phython@gcc.gnu.org	2005-06-13 00:18:41

Modified files:
	gcc            : ChangeLog fold-const.c 
	gcc/testsuite  : ChangeLog 
	gcc/testsuite/gcc.dg: pr14796-1.c 

Log message:
	2005-06-12  James A. Morrison  <phython@gcc.gnu.org>
	
	PR tree-optimization/14796
	* fold-const (fold_binary): Transform (X << C) >> C into X & (-1>>C)
	for unsigned types.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.9132&r2=2.9133
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/fold-const.c.diff?cvsroot=gcc&r1=1.593&r2=1.594
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&r1=1.5628&r2=1.5629
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.dg/pr14796-1.c.diff?cvsroot=gcc&r1=1.1&r2=1.2


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14796