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From: "pan2.li at intel dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/114639] [riscv] ICE in create_pre_exit, at
 mode-switching.cc:451
Date: Tue, 09 Apr 2024 01:33:15 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D114639

--- Comment #5 from Li Pan <pan2.li at intel dot com> ---
(In reply to Kito Cheng from comment #4)
> Reduced case:
> ```c
> typedef long c;
> #pragma riscv intrinsic "vector"
> template <unsigned long> struct d {};
> struct e {
>   using f =3D d<0>;
> };
> struct g {
>   using f =3D e::f;
> };
> template <typename, int> using h =3D g::f;
> template <unsigned long i> long k(d<i>);
> vbool16_t j(vuint64m4_t a) {
>   c b;
>   return __riscv_vmsne_vx_u64m4_b16(a, b, k(h<c, 2>()));
> }
>=20
> ```

Thanks Kito, reproduced on reduced case with option "riscv64-unknown-elf-g++
-O2 -march=3Drv64gcv". will take a look into it.


during RTL pass: mode_sw
test.c: In function =E2=80=98vbool16_t j(vuint64m4_t)=E2=80=99:
test.c:15:1: internal compiler error: in create_pre_exit, at
mode-switching.cc:451
   15 | }
      | ^
0x3978f12 create_pre_exit=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20
/home/pli/gcc/555/riscv-gnu-toolchain/gcc/__RISCV_BUILD__/../gcc/mode-switc=
hing.cc:451
0x3979e9e optimize_mode_switching
=20=20=20=20=20=20=20
/home/pli/gcc/555/riscv-gnu-toolchain/gcc/__RISCV_BUILD__/../gcc/mode-switc=
hing.cc:849
0x397b9bc execute
=20=20=20=20=20=20=20
/home/pli/gcc/555/riscv-gnu-toolchain/gcc/__RISCV_BUILD__/../gcc/mode-switc=
hing.cc:1324
Please submit a full bug report, with preprocessed source (by using
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Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.=