[Bug tree-optimization/17528] [4.0 Regression] tree optimization incorrectly optimizes away entire function (incorrect aliasing detection?)

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2004-09-17 01:10 -------
Subject: Bug 17528

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	dnovillo@gcc.gnu.org	2004-09-17 01:10:30

Modified files:
	gcc            : ChangeLog tree-ssa-alias.c 

Log message:
	PR tree-optimization/17528
	* tree-ssa-alias.c (compute_flow_insensitive_aliasing): Do not
	erase the may-alias set for a tag when merging it with
	another.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.5486&r2=2.5487
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-ssa-alias.c.diff?cvsroot=gcc&r1=2.35&r2=2.36



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17528