[llvm-dev] emitter tableGen stack dumped error

[Krzysztof Parzyszek via llvm-dev]

It may be difficult to tell what the problem is by looking at the call 
stack (especially if the function names are missing).
It's likely that there is some mismatch between operand lists for some 
instruction.  If you actually have the core dump, you could load it into 
a debugger and see where the failing getSubOperandNumber was called 
from, and insert some debugging code in there (to print the data 
structures for which the call fails). A lot of the TableGen's data can 
be printed by calling a member function "dump()". This could lead you 
closer to the actual location in the .td file that may contain the bug.

-Krzysztof


On 11/10/2016 6:04 AM, Varun Patil via llvm-dev wrote:
> Hi Developers,
>
> I have started developing LLVM backend for my Target.
> Unfortunately, I hit quite a few times very cryptic error messages when
> compiling
> with TableGen.
>  The most cryptic error message was when compiling with TableGen, with
> the option
> -gen-emitter . Here I got the following error message:
> llvm-tblgen:
> /home/varun/workspace-llvm/llvm/utils/TableGen/CodeGenInstruction.h:186:
> std::pair<unsigned int, unsigned int>
> llvm::CGIOperandList::getSubOperandNumber(unsigned int) const: Assertion
> `i < OperandList.size() && "Invalid flat operand #"' failed.
> 0  llvm-tblgen     0x0000000000641025
> 1  llvm-tblgen     0x0000000000641380
> 2  llvm-tblgen     0x000000000063f656
> 3  llvm-tblgen     0x000000000064099d
> 4  libpthread.so.0 0x00002abdd763b330
> 5  libc.so.6       0x00002abdd84ccc37 gsignal + 55
> 6  libc.so.6       0x00002abdd84d0028 abort + 328
> 7  libc.so.6       0x00002abdd84c5bf6
> 8  libc.so.6       0x00002abdd84c5ca2
> 9  llvm-tblgen     0x000000000042aa36
> 10 llvm-tblgen     0x000000000045f8f1
> 11 llvm-tblgen     0x0000000000460215
> 12 llvm-tblgen     0x0000000000460996
> 13 llvm-tblgen     0x0000000000460d27
> 14 llvm-tblgen     0x00000000005ce3df
> 15 llvm-tblgen     0x0000000000660bf9
> 16 llvm-tblgen     0x00000000005cea27
> 17 libc.so.6       0x00002abdd84b7f45 __libc_start_main + 245
> 18 llvm-tblgen     0x00000000004059e9
> Stack dump:
> 0.    Program arguments: ../../../bin/llvm-tblgen -gen-emitter -I
> /home/varun/workspace-llvm/llvm/lib/Target/LEG -I
> /home/varun/workspace-llvm/llvm/lib/Target -I
> /home/varun/workspace-llvm/llvm/include
> /home/varun/workspace-llvm/llvm/lib/Target/LEG/LEG.td -o
> /home/varun/workspace-llvm/llvm-build/lib/Target/LEG/LEGGenMCCodeEmitter.inc.tmp
>
> Aborted (core dumped)
>
> Please help me to solve this error.
> Thank you in advance
>
>
>
> Thanks and Regards
> Varun
>
>
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