r138882 - in /trunk/gcc: ChangeLog testsuite/Ch...

[rguenth@gcc.gnu.org]

Author: rguenth
Date: Fri Aug  8 15:01:05 2008
New Revision: 138882

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=138882
Log:
2008-08-08  Richard Guenther  <rguenther@suse.de>

	* tree-ssa-ccp.c (likely_value): Calls are not all varying.
	(surely_varying_stmt_p): Calls are varying only if they are
	non-builtin and not indirect or have no result.
	(ccp_fold): Re-instantiate code before the tuples merge.

	* gcc.dg/tree-ssa/ssa-ccp-20.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-ccp-20.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-ccp.c