[llvm-dev] Interpreter crash due to an "Unknown constant pointer type!"

[David Blaikie via llvm-dev]

Probably need a debug (& probably +Asserts) build to see more about
where it's failing & that might help you fix it - if you want other folks
to be able to help debug the issue, providing the full reproduction steps
(the entire input files, what commands were run, etc) - though, preferably,
minimized (simplify the inputs/commands, etc, while still producing the
failure)

On Thu, Dec 19, 2019 at 11:06 AM Alberto Barbaro via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> Hi all,
> as usual I'm playing with the Interpreter and unfortunately I hit a crash.
> I have narrowed down the problem an the crash happens inside the inflate
> function which is part of zlib and specifically at the instruction:
>
> store <2 x %struct.code*> <%struct.code* getelementptr inbounds ([512 x
> %struct.code], [512 x %struct.code]* @fixedtables.lenfix.681, i64 0, i64
> 0), %struct.code* getelementptr inbounds ([32 x %struct.code], [32 x
> %struct.code]* @fixedtables.distfix.682, i64 0, i64 0)>, <2 x
> %struct.code*>* %96, align 8, !tbaa !46
>
> The output from lli is:
>
> Unknown constant pointer type!
> UNREACHABLE executed at
> /home/al/Desktop/llvm-6.0.1.src/lib/ExecutionEngine/ExecutionEngine.cpp:1007!
> LLVMSymbolizer: error reading file: No such file or directory
> #0 0x0000000001765ee9 (lli+0x1765ee9)
> #1 0x0000000001766099 (lli+0x1766099)
> #2 0x0000000001764643 (lli+0x1764643)
> #3 0x0000000001766424 (lli+0x1766424)
> #4 0x00007faade157890 __restore_rt
> (/lib/x86_64-linux-gnu/libpthread.so.0+0x12890)
> #5 0x00007faadcc15e97 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x3ee97)
> #6 0x00007faadcc17801 abort (/lib/x86_64-linux-gnu/libc.so.6+0x40801)
> #7 0x00000000016d7150 (lli+0x16d7150)
> #8 0x0000000001139543 (lli+0x1139543)
> #9 0x00000000011500b8 (lli+0x11500b8)
> #10 0x000000000115c25d (lli+0x115c25d)
> #11 0x0000000001167d32 (lli+0x1167d32)
> #12 0x000000000116430d (lli+0x116430d)
> #13 0x0000000001163580 (lli+0x1163580)
> #14 0x000000000114e197 (lli+0x114e197)
> #15 0x0000000001135ba0 (lli+0x1135ba0)
> #16 0x00000000008c729d (lli+0x8c729d)
> #17 0x00007faadcbf8b97 __libc_start_main
> (/lib/x86_64-linux-gnu/libc.so.6+0x21b97)
> #18 0x00000000008c4f1a (lli+0x8c4f1a)
>
> Is there anyone that can help me to understand how to fix it even a simple
> workaround for the moment would be enough!
>
> Thanks,
> Alberto
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> llvm-dev at lists.llvm.org
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