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From: "ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/96654] Failure to optimize vectorized
 conversion to `int` with AVX
Date: Mon, 17 Aug 2020 19:04:22 +0000
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X-Bugzilla-Component: tree-optimization
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X-Bugzilla-Keywords: missed-optimization
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D96654

Uro=C5=A1 Bizjak <ubizjak at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
          Component|target                      |tree-optimization
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2020-08-17

--- Comment #1 from Uro=C5=A1 Bizjak <ubizjak at gmail dot com> ---
The relevant pattern is present in sse.md:

(define_insn "fix_truncv4dfv4si2<mask_name>"
  [(set (match_operand:V4SI 0 "register_operand" "=3Dv")
        (fix:V4SI (match_operand:V4DF 1 "nonimmediate_operand" "vm")))]
  "TARGET_AVX || (TARGET_AVX512VL && TARGET_AVX512F)"
  "vcvttpd2dq{y}\t{%1, %0<mask_operand2>|%0<mask_operand2>, %1}"

but for some reason not exercised by target-independent part of the compile=
r.

Confirmed as a tree optimization problem.=