[LLVMbugs] [Bug 9723] suboptimal treatment of "rm" constraint in inline assembly

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=9723

Chris Lattner <clattner at apple.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |LATER

--- Comment #1 from Chris Lattner <clattner at apple.com> 2011-04-14 10:39:47 CDT ---
Tuning inline assembly performance is very very low on our priority list.  If
you want good performance, you should use standard headers like <smmintrin.h>
and _mm_popcnt_u64.

If you're working with a gcc that doesn't support this SSE4 headers, you can
use:

#ifdef __clang__
...

-Chris

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