r118926 - in /trunk/gcc: ChangeLog testsuite/Ch...

[rakdver@gcc.gnu.org]

Author: rakdver
Date: Fri Nov 17 10:29:07 2006
New Revision: 118926

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=118926
Log:
	PR tree-optimization/29801
	* tree-ssa-ccp.c (get_symbol_constant_value): New function.
	(get_default_value): Use get_symbol_constant_value.
	(set_lattice_value): ICE when the value of the constant is
	changed.
	(visit_assignment): Ignore VDEFs of read-only variables.

	* gcc.dg/pr29801.c: New test.


Added:
    trunk/gcc/testsuite/gcc.dg/pr29801.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-ccp.c