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From: "ams at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/95730] GCN offloading ICEs after commit
 fe7ebef7fe4f9acb79658ed9db0749b07efc3105 "Add support for __builtin_bswap128"
Date: Fri, 24 Jul 2020 12:25:39 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D95730

--- Comment #4 from Andrew Stubbs <ams at gcc dot gnu.org> ---
In fact default_scalar_mode_supported_p does return *false* for TImode (bec=
ause
LONG_LONG_TYPE_SIZE =3D=3D 64, and BITS_PER_WORD =3D=3D 32).

Therefore int128_t does not exist, as far as users are concerned. I'm not s=
ure
how that translates to the GCC internals, but trying to use TImode for anyt=
hing
other than moves is not going to work on GCN.=