[Bug tree-optimization/15791] fold misses that two ADDR_EXPR of an arrary obvious not equal

cvs-commit at gcc dot gnu dot org gcc-bugzilla@gcc.gnu.org
Sat Jan 29 19:25:00 GMT 2005


------- Additional Comments From cvs-commit at gcc dot gnu dot org  2005-01-29 19:25 -------
Subject: Bug 15791

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	sayle@gcc.gnu.org	2005-01-29 19:25:17

Modified files:
	gcc            : ChangeLog fold-const.c 
	gcc/testsuite  : ChangeLog 
Added files:
	gcc/testsuite/gcc.dg/tree-ssa: pr15791-1.c pr15791-2.c 
	                               pr15791-3.c pr15791-4.c 
	                               pr15791-5.c 
	gcc/testsuite/g++.dg/tree-ssa: pr15791-1.C pr15791-2.C 
	                               pr15791-3.C pr15791-4.C 
	                               pr15791-5.C 

Log message:
	2005-01-29  Richard Guenther <richard.guenther@uni-tuebingen.de>
	
	PR tree-optimization/15791
	* fold-const.c (extract_array_ref): New function.
	(fold): Fold comparisons between &a[i] and &a[j] or
	semantically equivalent trees.
	
	* gcc.dg/tree-ssa/pr15791-1.c: New testcase.
	* gcc.dg/tree-ssa/pr15791-2.c: Likewise.
	* gcc.dg/tree-ssa/pr15791-3.c: Likewise.
	* gcc.dg/tree-ssa/pr15791-4.c: Likewise.
	* gcc.dg/tree-ssa/pr15791-5.c: Likewise.
	* g++.dg/tree-ssa/pr15791-1.C: Likewise.
	* g++.dg/tree-ssa/pr15791-2.C: Likewise.
	* g++.dg/tree-ssa/pr15791-3.C: Likewise.
	* g++.dg/tree-ssa/pr15791-4.C: Likewise.
	* g++.dg/tree-ssa/pr15791-5.C: Likewise.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.7325&r2=2.7326
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/fold-const.c.diff?cvsroot=gcc&r1=1.498&r2=1.499
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&r1=1.4957&r2=1.4958
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.dg/tree-ssa/pr15791-1.c.diff?cvsroot=gcc&r1=NONE&r2=1.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.dg/tree-ssa/pr15791-2.c.diff?cvsroot=gcc&r1=NONE&r2=1.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.dg/tree-ssa/pr15791-3.c.diff?cvsroot=gcc&r1=NONE&r2=1.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.dg/tree-ssa/pr15791-4.c.diff?cvsroot=gcc&r1=NONE&r2=1.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.dg/tree-ssa/pr15791-5.c.diff?cvsroot=gcc&r1=NONE&r2=1.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/tree-ssa/pr15791-1.C.diff?cvsroot=gcc&r1=NONE&r2=1.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/tree-ssa/pr15791-2.C.diff?cvsroot=gcc&r1=NONE&r2=1.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/tree-ssa/pr15791-3.C.diff?cvsroot=gcc&r1=NONE&r2=1.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/tree-ssa/pr15791-4.C.diff?cvsroot=gcc&r1=NONE&r2=1.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/tree-ssa/pr15791-5.C.diff?cvsroot=gcc&r1=NONE&r2=1.1



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15791



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