[Bug tree-optimization/23386] [4.1 Regression] bitmap.c is being miscompiled (VRP)

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2005-08-15 07:51 -------
Subject: Bug 23386

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	spop@gcc.gnu.org	2005-08-15 07:51:42

Modified files:
	gcc            : ChangeLog tree-data-ref.c 
Added files:
	gcc/testsuite/gcc.dg/tree-ssa: pr23386.c 

Log message:
	PR 23386
	* tree-data-ref.c (estimate_niter_from_size_of_data): When
	step is negative compute the estimation from init downwards to
	zero.
	
	* testsuite/gcc.dg/tree-ssa/pr23386.c: New.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.9731&r2=2.9732
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-data-ref.c.diff?cvsroot=gcc&r1=2.37&r2=2.38
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.dg/tree-ssa/pr23386.c.diff?cvsroot=gcc&r1=NONE&r2=1.1



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23386