[Bug target/68923] SSE/AVX movq load (_mm_cvtsi64_si128) not being folded into pmovzx
peter at cordes dot ca
gcc-bugzilla@gcc.gnu.org
Tue Dec 15 20:24:00 GMT 2015
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68923
Peter Cordes <peter at cordes dot ca> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization, ssemmx
Target| |x86_64-linux-gnu
URL| |http://stackoverflow.com/qu
| |estions/34279513/loading-8-
| |chars-from-memory-into-an-m
| |256-variable-as-packed-sing
| |le-precision-f
--- Comment #1 from Peter Cordes <peter at cordes dot ca> ---
The other issue (that there's no intrinsic to generate a movq m64, %xmm in
32bit mode), is addressed in
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68924.
This bug is just about the optimization failure to fold the load into pmovzx.
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