------- Additional Comments From cvs-commit at gcc dot gnu dot org  2005-05-27 
02:46 -------
Subject: Bug 9814

CVSROOT:        /cvs/gcc
Module name:    gcc
Changes by:     [EMAIL PROTECTED]       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



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=9814

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