[llvm-dev] Running grep with LLI

[Mehdi Amini via llvm-dev]

> On Dec 27, 2016, at 5:25 AM, via llvm-dev <llvm-dev at lists.llvm.org> wrote:
> 
> Hi everyone,
> 
> I compiled grep with llvm-3.4(because consumer tool uses llvm3.4 bit code)
> and generate bit-code for this.
> 
> When I am running with lli output is
> 
> pseudo instructions should be removed before code emission

This error looks like an internal LLVM bug. I don’t think there is much you can do about it other than:

1) upgrading to a more recent LLVM
2) find when the bug was fixed and backport the fix on your 3.4 version (this is non-trivial and likely quite involved).

As a starter, can you compile the code with llc instead of using lli (in case lli does not setup something correctly)?

— 
Mehdi



> UNREACHABLE executed at
> /home/awanish/llvm/llvm-3.4.2/lib/Target/X86/X86CodeEmitter.cpp:1176!
> 0  libLLVM-3.4.so  0x00007f1250f655d5
> llvm::sys::PrintStackTrace(_IO_FILE*) + 37
> 1  libLLVM-3.4.so  0x00007f1250f65a23
> 2  libpthread.so.0 0x00007f124fffd330
> 3  libc.so.6       0x00007f124f011c37 gsignal + 55
> 4  libc.so.6       0x00007f124f015028 abort + 328
> 5  libLLVM-3.4.so  0x00007f1250f5218c llvm::llvm_unreachable_internal(char
> const*, char const*, unsigned int) + 444
> 6  libLLVM-3.4.so  0x00007f12510624f2
> 7  libLLVM-3.4.so  0x00007f125105f3a2
> 8  libLLVM-3.4.so  0x00007f125087b6ec
> llvm::MachineFunctionPass::runOnFunction(llvm::Function&) + 124
> 9  libLLVM-3.4.so  0x00007f1250a46d9a
> llvm::FPPassManager::runOnFunction(llvm::Function&) + 362
> 10 libLLVM-3.4.so  0x00007f1250a464fe
> llvm::legacy::FunctionPassManagerImpl::run(llvm::Function&) + 238
> 11 libLLVM-3.4.so  0x00007f1250a4639d
> llvm::legacy::FunctionPassManager::run(llvm::Function&) + 93
> 12 libLLVM-3.4.so  0x00007f1250bca1dd
> llvm::JIT::runJITOnFunctionUnlocked(llvm::Function*, llvm::MutexGuard
> const&) + 45
> 13 libLLVM-3.4.so  0x00007f1250bca435
> llvm::JIT::getPointerToFunction(llvm::Function*) + 261
> 14 lli             0x0000000000409f95 main + 4437
> 15 libc.so.6       0x00007f124effcf45 __libc_start_main + 245
> 16 lli             0x00000000004069bd
> Stack dump:
> 0.    Program arguments: lli kleegrep.bc
> 1.    Running pass 'X86 Machine Code Emitter' on function '@main'
> Aborted (core dumped)
> 
> Can anyone help me in debugging this. I am doing wrong in bit-code
> generation phase or in execution.
> 
> 
> -- 
> Thanks and Regards
> Awanish Pandey
> PhD, CSE
> IIT Kanpur
> 
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