[Bug tree-optimization/22018] [4.1 Regression] VRP miscompiles multiply

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2005-06-15 11:33 -------
Subject: Bug 22018

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	dnovillo@gcc.gnu.org	2005-06-15 11:33:14

Modified files:
	gcc            : ChangeLog tree-vrp.c 
	gcc/testsuite  : ChangeLog 
	gcc/testsuite/gcc.dg/tree-ssa: vrp13.c 
Added files:
	gcc/testsuite/gcc.dg/tree-ssa: pr22018.c 

Log message:
	PR 22018
	* tree-vrp.c (vrp_int_const_binop): New.
	(extract_range_from_binary_expr): Call it.
	Unify handling division and multiplication.
	
	testsuite/ChangeLog:
	
	PR 22018
	* gcc.dg/tree-ssa/vrp13.c: Add multiplication tests.
	* gcc.dg/tree-ssa/pr22018.c: New test.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.9150&r2=2.9151
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-vrp.c.diff?cvsroot=gcc&r1=2.27&r2=2.28
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&r1=1.5638&r2=1.5639
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.dg/tree-ssa/pr22018.c.diff?cvsroot=gcc&r1=NONE&r2=1.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.dg/tree-ssa/vrp13.c.diff?cvsroot=gcc&r1=1.1&r2=1.2



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22018