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Subject: [Bug c/105970] ICE in ix86_function_arg, at config/i386/i386.cc:3351
Date: Tue, 14 Jun 2022 15:12:30 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105970

--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Uro=C5=A1 Bizjak from comment #1)
> Probably something like:
>=20
> diff --git a/gcc/config/i386/i386.cc b/gcc/config/i386/i386.cc
> index 3d189e124e4..f158cc3aaea 100644
> --- a/gcc/config/i386/i386.cc
> +++ b/gcc/config/i386/i386.cc
> @@ -3348,7 +3348,7 @@ ix86_function_arg (cumulative_args_t cum_v, const
> function_arg_info &arg)
>        if (POINTER_TYPE_P (arg.type))
>         {
>           /* This is the pointer argument.  */
> -         gcc_assert (TYPE_MODE (arg.type) =3D=3D Pmode);
> +         gcc_assert (TYPE_MODE (arg.type) =3D=3D ptr_mode);

This looks reasonable since pointer mode should be ptr_mode.

>           /* It is at -WORD(AP) in the current frame in interrupt and
>              exception handlers.  */
>           reg =3D plus_constant (Pmode, arg_pointer_rtx, -UNITS_PER_WORD);
>=20
> Pointer mode and Pmode can be distinct for x32 target.  However, I have no
> idea what goes into interrupt frame for x32. Let's ask HJ.=