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From: "crazylht at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/102211] ICE introduced by r12-3277
Date: Mon, 06 Sep 2021 04:38:20 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102211

--- Comment #1 from Hongtao.liu <crazylht at gmail dot com> ---
But it's ok for

float
foo (float a, long b)
{
  union{float a[2];
    long b;}c;
  c.b =3D b;
  return c.a[0];
}


foo:
        fmv.w.x fa0,a0
        ret

Which means movement between gpr and float reg is allowed.=