llvm dev - Mar 2018 - Segmentation fault when using llc to target riscv.

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).



-- 
Ahmed Samara
M.S. Computer Engineering
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LLVM 6.0 is out, why not try to latest one?

2018-03-02 20:01 GMT+08:00 Ahmed Samara via llvm-dev <llvm-dev at
lists.llvm.org>:
> 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).
>
>
>
> --
> Ahmed Samara
> M.S. Computer Engineering
>
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>


-- 
Wei-Ren Chen (陳韋任)
Homepage: https://people.cs.nctu.edu.tw/~chenwj

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