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From: "crazylht at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/105288] AVX/AVX512 casts should use the "v" constraint
Date: Mon, 18 Apr 2022 02:25:38 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105288

--- Comment #2 from Hongtao.liu <crazylht at gmail dot com> ---
I think HJ means avx_<castmode><avxsizesuffix>_<castmode> can be extended to
evex sse registes by change "x" to "v" when AVX512VL is available.

For avx512f_<castmode><avxsizesuffix>_<castmode>, it should be
"=3DYv,m"
" vm,v"

since operands[0] could be allocated as evex register w/o AVX512VL, but it =
will
be lower to 256-bit mov which require AVX512VL for evex registers.=