[Bug middle-end/20933] [4.1 Regression] gcc can no longer bootstrap itself

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2005-04-11 22:07 -------
Subject: Bug 20933

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	dnovillo@gcc.gnu.org	2005-04-11 22:06:47

Modified files:
	gcc            : ChangeLog tree-ssa-alias.c tree-ssa.c 
	gcc/testsuite  : ChangeLog 
Added files:
	gcc/testsuite/gcc.dg/tree-ssa: pr20933.c 

Log message:
	PR tree-optimization/20933
	* tree-ssa-alias.c (compute_flow_insensitive_aliasing): Move
	logic to reject aliases between read-only and writable
	variables ...
	(may_alias_p): ... here.
	(get_tmt_for): Do not associate read-only tags to pointers
	whose pointed-to type is not read-only.
	* tree-ssa.c (verify_ssa): Check that memory stores have at
	least one V_MAY_DEF or V_MUST_DEF.
	
	testsuite/ChangeLog
	
	PR tree-optimization/20933
	* gcc.dg/tree-ssa/pr20933.c: New test.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.8239&r2=2.8240
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-ssa-alias.c.diff?cvsroot=gcc&r1=2.84&r2=2.85
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-ssa.c.diff?cvsroot=gcc&r1=2.87&r2=2.88
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&r1=1.5327&r2=1.5328
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.dg/tree-ssa/pr20933.c.diff?cvsroot=gcc&r1=NONE&r2=1.1



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20933