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From: "gabravier at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/95845] New: Failure to optimize vector load
 made in separate operations to single load
Date: Tue, 23 Jun 2020 15:43:57 +0000
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: tree-optimization
X-Bugzilla-Version: 11.0
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D95845

            Bug ID: 95845
           Summary: Failure to optimize vector load made in separate
                    operations to single load
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gabravier at gmail dot com
  Target Milestone: ---

typedef float __attribute__((vector_size(8))) v2f32;

v2f32 f(const float *ptr)
{
    v2f32 r;
    r[0] =3D ptr[0];
    r[1] =3D ptr[1];
    return r;
}

This can be optimized to `return (v2f32){ptr[0], ptr[1]};`. This transforma=
tion
is done by LLVM, but not by GCC.=