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[Bug target/18766] Inefficient code with -mfpmath=387,sse
- From: "ubizjak at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 3 Aug 2008 16:59:44 -0000
- Subject: [Bug target/18766] Inefficient code with -mfpmath=387,sse
- References: <bug-18766-102@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #3 from ubizjak at gmail dot com 2008-08-03 16:59 -------
GNU C (GCC) version 4.4.0 20080803 (experimental) is now much smarter, several
rewrites of math ops now result in:
foobar:
pushl %ebp
movl %esp, %ebp
flds a
fmuls b
flds a+4
fmuls b+4
faddp %st, %st(1)
popl %ebp
ret
So, fixed for 4.4.
--
ubizjak at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
Target Milestone|--- |4.4.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18766