diff options
| author | jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-08-26 12:15:25 +0000 |
|---|---|---|
| committer | jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-08-26 12:15:25 +0000 |
| commit | 3b23b4cce8a3397e830b9e57e66ce9a35dbbdd7b (patch) | |
| tree | 38c43d9eeba68b3c670a4a594f19e3b254a85720 /gcc/rtlanal.c | |
| parent | f32d300e7da31c677823798d7a57534953310f1e (diff) | |
| download | gcc-3b23b4cce8a3397e830b9e57e66ce9a35dbbdd7b.tar.gz | |
* rtlanal.c (nonzero_bits1): Handle CLRSB.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@178101 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/rtlanal.c')
| -rw-r--r-- | gcc/rtlanal.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/gcc/rtlanal.c b/gcc/rtlanal.c index 7fa3ca6f315..d6e84a22221 100644 --- a/gcc/rtlanal.c +++ b/gcc/rtlanal.c @@ -1,7 +1,7 @@ /* Analyze RTL for GNU compiler. Copyright (C) 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, - 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 - Free Software Foundation, Inc. + 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, + 2011 Free Software Foundation, Inc. This file is part of GCC. @@ -4273,6 +4273,11 @@ nonzero_bits1 (const_rtx x, enum machine_mode mode, const_rtx known_x, nonzero = -1; break; + case CLRSB: + /* This is at most the number of bits in the mode minus 1. */ + nonzero = ((unsigned HOST_WIDE_INT) 1 << (floor_log2 (mode_width))) - 1; + break; + case PARITY: nonzero = 1; break; |