r176482 - in /branches/gcc-4_4-branch/gcc: Chan...

[jakub@gcc.gnu.org]

Author: jakub
Date: Tue Jul 19 19:28:41 2011
New Revision: 176482

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=176482
Log:
	Backport from mainline
	2011-05-23  Jakub Jelinek  <jakub@redhat.com>

	PR middle-end/48973
	* expr.c (expand_expr_real_1) <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 TREE_TYPE (exp) is single bit signed type, disable
	single bit test optimization, pass -1 instead of 1 as last
	parameter to emit_store_flag and use constm1_rtx instead of
	const1_rtx as true value.

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

Added:
    branches/gcc-4_4-branch/gcc/testsuite/gcc.c-torture/execute/pr48973-1.c
    branches/gcc-4_4-branch/gcc/testsuite/gcc.c-torture/execute/pr48973-2.c
Modified:
    branches/gcc-4_4-branch/gcc/ChangeLog
    branches/gcc-4_4-branch/gcc/expr.c
    branches/gcc-4_4-branch/gcc/testsuite/ChangeLog