r174060 - in /trunk/gcc: ChangeLog expr.c tests...

[jakub@gcc.gnu.org]

Author: jakub
Date: Mon May 23 09:36:05 2011
New Revision: 174060

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=174060
Log:
	PR middle-end/48973
	* expr.c (expand_expr_real_2) <case LT_EXPR>: If do_store_flag
	failed and the comparison has a single bit signed type, use
	constm1_rtx instead of const1_rtx for true value.
	(do_store_flag): If ops->type is single bit signed type, disable
	signel bit test optimization and pass -1 instead of 1 as last
	parameter to emit_store_flag_force.

	* gcc.c-torture/execute/pr48973-1.c: New test.
	* gcc.c-torture/execute/pr48973-2.c: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/execute/pr48973-1.c
    trunk/gcc/testsuite/gcc.c-torture/execute/pr48973-2.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/expr.c
    trunk/gcc/testsuite/ChangeLog