[llvm-dev] Segmentation fault when using llc to target riscv.

[Alex Bradbury via llvm-dev]

On 2 March 2018 at 12:01, Ahmed Samara via llvm-dev
<llvm-dev at lists.llvm.org> wrote:
> I am using LLVM version 4.0.1
>
> Running `llc -march=riscv64 math.ll` returns:
>
> #0 0x0000000000fed7d1 (llc+0xfed7d1)
> #1 0x0000000000fec559 (llc+0xfec559)
> #2 0x0000000000fec8d9 (llc+0xfec8d9)
> #3 0x00007f22c044e5e0 __restore_rt (/lib64/libpthread.so.0+0xf5e0)
> #4 0x0000000000d7faf3 (llc+0xd7faf3)
> #5 0x0000000000cd4b88 (llc+0xcd4b88)
> #6 0x0000000000cd530c (llc+0xcd530c)
> #7 0x00000000006858c3 (llc+0x6858c3)
> #8 0x000000000063c442 (llc+0x63c442)
> #9 0x00007f22bf031c05 __libc_start_main (/lib64/libc.so.6+0x21c05)
> #10 0x000000000067f08a (llc+0x67f08a)
> Stack dump:
> 0.      Program arguments: llc -march=riscv32 math.ll
> Segmentation fault (core dumped)
>
>
> It works fine when I use any other argument for -march (x86, arm, arm64).

Hi Ahmed,

Sorry for missing this post earlier. If you're interested in
experimenting with the current state of RISC-V support in LLVM I'd
strongly recommend building using LLVM HEAD. Note that RISC-V is still
an 'experimental' backend
(https://llvm.org/docs/DeveloperPolicy.html#new-targets), though we
hope to pursue its promotion to 'official' prior to LLVM 7.0
branching. I intend to start that conversation within a month from
now.

Best,

Alex