gcc/gcc ChangeLog ifcvt.c testsuite/ChangeLog ...

[sayle@gcc.gnu.org]

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	sayle@gcc.gnu.org	2005-05-27 02:46:01

Modified files:
	gcc            : ChangeLog ifcvt.c 
	gcc/testsuite  : ChangeLog 
Added files:
	gcc/testsuite/gcc.dg: pr9814-1.c 

Log message:
	PR tree-optimization/9814
	* ifcvt.c (noce_emit_move_insn): If we fail to recognize the move
	instruction, add the necessary clobbers by re-expanding the RTL
	for arithmetic operations via optab.c's expand_unop/expand_binop.
	(noce_try_bitop): New function to optimize bit manipulation idioms
	of the form "if (x & C) x = x op C" and "if (!(x & C) x = x op C".
	(noce_process_if_block): Call noce_try_bitop.
	
	* gcc.dg/pr9814-1.c: New test case.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.8916&r2=2.8917
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ifcvt.c.diff?cvsroot=gcc&r1=1.187&r2=1.188
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&r1=1.5540&r2=1.5541
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.dg/pr9814-1.c.diff?cvsroot=gcc&r1=NONE&r2=1.1