r128840 - in /trunk/gcc: ChangeLog fold-const.c...

[ian at gcc dot gnu dot org]

Author: ian
Date: Thu Sep 27 17:31:34 2007
New Revision: 128840

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=128840
Log:
./:
	PR tree-optimization/33565
	* tree-ssa-loop-ch.c (copy_loop_headers): Set TREE_NO_WARNING on
	assignments of comparisons.
	* tree-ssa-sccvn.c (simplify_binary_expression): Add stmt
	parameter.  Change caller.  Defer overflow warnings around call to
	fold_binary.
	* fold-const.c (fold_undefer_overflow_warnings): Don't warn if
	TREE_NO_WARNING is set on the statement.
	* tree-ssa-forwprop.c
	(tree_ssa_forward_propagate_single_use_vars): Don't test
	TREE_NO_WARNING when calling fold_undefer_overflow_warnings.
	* tree-cfg.c (fold_cond_expr_cond): Likewise.
testsuite/:
	PR tree-optimization/33565
	* gcc.dg/Wstrict-overflow-20.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/Wstrict-overflow-20.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/fold-const.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-cfg.c
    trunk/gcc/tree-ssa-forwprop.c
    trunk/gcc/tree-ssa-loop-ch.c
    trunk/gcc/tree-ssa-sccvn.c