------- Comment #2 from hjl dot tools at gmail dot com 2010-06-09 03:26 -------
(In reply to comment #0)
>
> While running some tests against SSE4.2 instructions, I noticed that the
> __builtin_ia32_pcmpestri128 method generates the correct pcmpestri call
> followed immediately by an extraneous pcmpestrm call. The second call goes
> away when compiled with any optimization level.
>
-O0 generates unoptimized code. In your testcase, gcc also generates
movdqa .LC0(%rip), %xmm0
movdqa %xmm0, -32(%rbp)
movdqa .LC1(%rip), %xmm0
movdqa %xmm0, -48(%rbp)
movdqa -48(%rbp), %xmm1
movdqa -32(%rbp), %xmm0
Those aren't necessary either.
--
hjl dot tools at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |WORKSFORME
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44472
