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From: "linkw at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/103622] [12 Regression] ICE: Segmentation fault (in
 altivec_resolve_new_overloaded_builtin)
Date: Wed, 15 Dec 2021 02:53:55 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103622

--- Comment #10 from Kewen Lin <linkw at gcc dot gnu.org> ---
> test.c: In function =E2=80=98get_float128_exponent=E2=80=99:
> test.c:4:5: note: overloaded builtin =E2=80=98__builtin_vec_scalar_extrac=
t_exp=E2=80=99 is
> implemented by builtin =E2=80=98__builtin_vsx_scalar_extract_expq=E2=80=99
>    4 |     return __builtin_vec_scalar_extract_exp (a);
>      |     ^~~~~~
> test.c:4:12: error: =E2=80=98__builtin_vsx_scalar_extract_expq=E2=80=99 r=
equires ISA 3.0 IEEE > 128-bit floating point
>     4 |     return __builtin_vec_scalar_extract_exp (a);
>       |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Just a record to avoid confusion, the above message was the previously emit=
ted
message before r12-5752 for powerpc-e300c3 cross since it doesn't support i=
eee
float128. The message is also the same as what I saw on P8 BE with
-mabi=3Dieeelongdouble, but we will get the message what Bill put if specif=
ying
with -mabi=3Dibmlongdouble there (that is "invalid parameter combination").

I just noticed that our built-in documents actually note the type should be
"__ieee128", it makes more sense to emit "invalid parameter combination"
instead, so Bill's proposed fix is the best.=