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[Bug target/32433] Code for __builtin_ffs does not benefit from compiler optimizations
- From: "uros at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 30 Jun 2007 17:06:01 -0000
- Subject: [Bug target/32433] Code for __builtin_ffs does not benefit from compiler optimizations
- References: <bug-32433-7904@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #3 from uros at gcc dot gnu dot org 2007-06-30 17:06 -------
Subject: Bug 32433
Author: uros
Date: Sat Jun 30 17:05:49 2007
New Revision: 126154
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=126154
Log:
PR target/32433
* config/i386/i386.md (ffssi2): Expand as ffs_cmove for TARGET_CMOVE.
(ffs_cmove): New expander to expand using ctz pattern.
(*ffs_cmove): Remove pattern.
(*ffs_no_cmove): Enable only for !TARGET_CMOVE.
(ffsdi2): Expand using ctz pattern.
(*ffs_rex64): Remove pattern.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.md
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32433