[Bug tree-optimization/21173] [4.0/4.1 regression] miscompiled pointer subtraction broke Linux kernel

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2005-04-25 14:03 -------
Subject: Bug 21173

CVSROOT:	/cvs/gcc
Module name:	gcc
Branch: 	gcc-4_0-branch
Changes by:	dberlin@gcc.gnu.org	2005-04-25 14:02:38

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

Log message:
	2005-04-25  Daniel Berlin  <dberlin@dberlin.org>
	
	Fix PR tree-optimization/21173
	
	* tree-ssa-pre.c (create_expression_by_pieces): Call unshare_expr
	on things we pass to force_gimple_operand.  Don't try to special
	case min_invariants.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=2.7592.2.192&r2=2.7592.2.193
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-ssa-pre.c.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=2.65.4.2&r2=2.65.4.3



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21173