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From: "pan2.li at intel dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/109773] New: RISC-V: ICE when build RVV Intrinisc
Date: Mon, 08 May 2023 14:52:53 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: c
X-Bugzilla-Version: 14.0
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X-Bugzilla-Severity: normal
X-Bugzilla-Who: pan2.li at intel dot com
X-Bugzilla-Status: UNCONFIRMED
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X-Bugzilla-Priority: P3
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109773

            Bug ID: 109773
           Summary: RISC-V: ICE when build RVV Intrinisc
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pan2.li at intel dot com
  Target Milestone: ---

There will be one ICE when trying to build the below code with the option
'-march=3Drv64gcv -O3 -fno-schedule-insns -c -S test.c -o -'.

#include "riscv_vector.h"
void f4 (int32_t * a, int32_t * b, int n)
{
    if (n <=3D 0)
      return;
    int i =3D n;
    size_t vl =3D __riscv_vsetvl_e8mf4 (i);
    for (; i >=3D 0; i--)
      {
        vint32m1_t v =3D __riscv_vle32_v_i32m1 (a + i, vl);
        v =3D __riscv_vle32_v_i32m1_tu (v, a + i + 100, vl);
        __riscv_vse32_v_i32m1 (b + i, v, vl);

        if (i >=3D vl)
          continue;
        if (i =3D=3D 0)
          return;
        vl =3D __riscv_vsetvl_e8mf4 (vl);
      }
}

The output of compiling.

> riscv64-unknown-linux-gnu-gcc -march=3Drv64gcv -O3 -fno-schedule-insns -c=
 -S test.c -o -
        .file   "test.c"
        .option nopic
        .attribute arch,
"rv64i2p1_m2p0_a2p1_f2p2_d2p2_c2p0_v1p0_zicsr2p0_zifencei2p0_zve32f1p0_zve3=
2x1p0_zve64d1p0_zve64f1p0_zve64x1p0_zvl128b1p0_zvl32b1p0_zvl64b1p0"
        .attribute unaligned_access, 0
        .attribute stack_align, 16
        .text
riscv64-unknown-linux-gnu-gcc: internal compiler error: Segmentation fault
signal terminated program cc1
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
See <https://gcc.gnu.org/bugs/> for instructions.
> riscv-gnu-toolchain@<22:46:54 =E4=B8=80 5=E6=9C=88 08>[4]*1*[3s]"~/bin/gn=
u-rv64-linux-13/bin/riscv64-unknown-linux-gnu-gcc -march=3Drv64gcv -O3 -fno=
-schedule-insns -c -S test.c -o -"
>> ~/bin/gnu-rv64-linux-13/bin/riscv64-unknown-linux-gnu-gcc --version
riscv64-unknown-linux-gnu-gcc (g1c9c53f0256) 13.1.1 20230508
Copyright (C) 2023 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.=