[Bug target/108401] gcc defeats vector constant generation with intrinsics

andysem at mail dot ru gcc-bugzilla@gcc.gnu.org
Mon Jan 16 10:04:58 GMT 2023


--- Comment #6 from andysem at mail dot ru ---
(In reply to Andrew Pinski from comment #1)
> >and gcc 12 generates a worse code:
> it is not worse really; depending on the how fast moving between the
> register sets is.

I meant "worse" compared to vpcmpeq+vpsrlw pair.

(Side note about the broadcast version: it could have been smaller if it used a
32-bit constant and vpbroadcastd. vpcmpeq+vpsrlw would still be better in this
particular case, but if broadcast is needed, a smaller footprint code is

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