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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/99648] [11 regression] gcc.dg/torture/pr71522.c fails
 starting with r11-165 for 32 bits
Date: Mon, 12 Apr 2021 11:30:55 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99648

--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #10)
> Created attachment 50566 [details]
> gcc11-pr99648.patch
>=20
> Updated patch which doesn't ICE anymore.  While I think the right thing
> would be to always punt on SUBREGs of constants, I think that is quite ri=
sky
> this late and so restricting it to MODE_COMPOSITE_P outermodes will make =
it
> restricted to
> powerpc IBM double double format and nothing else (well, there is also
> mips_extended_format, but no target seems to use it fortunately).

  if (MODE_COMPOSITE_P (outermode)

7347=20=20=20=20

      && (CONST_SCALAR_INT_P (op)

7348=20=20=20=20

          || CONST_DOUBLE_AS_FLOAT_P (op)

7349=20=20=20=20

          || CONST_FIXED_P (op)

7350=20=20=20=20

          || GET_CODE (op) =3D=3D CONST_VECTOR))

7351=20=20=20=20

    return NULL_RTX;

it's odd to reject CONST_INT_P but not CONST_DOUBLE-as-int, no?  Did you
mean to do

   if (MODE_COMPOSITE_P (outermode))
     switch (GET_CODE (op))
      {
      CASE_CONST_ANY:
        return NULL_RTX;
      default:;
      }

?  (yeah, CONST_ANY_P is missing it seems)=