[LLVMdev] Debug llc crash using bugpoint

[Cameron Zwarich]

Do something like this:

bugpoint -run-llc <bitcode file> --tool-args -- <llc arguments>

Cameron

On May 23, 2011, at 1:33 PM, Arushi Aggarwal wrote:

> Hi,
> 
> What is the best way to debug an llc crash using bugpoint?
> 
> I am getting the following crash that I would like to reduce 
> 
> llc: /home/vadve/aggarwa4/llvm29/llvm-2.9/lib/MC/MCAsmStreamer.cpp:273: virtual void<unnamed>::MCAsmStreamer::EmitLabel(llvm::MCSymbol*): Assertion `Symbol->isUndefined() && "Cannot define a symbol twice!"' failed.
> 0  llc             0x00000000013ae046
> 1  llc             0x00000000013ae5d4
> 2  libpthread.so.0 0x000000325660eb10
> 3  libc.so.6       0x0000003255a30265 gsignal + 53
> 4  libc.so.6       0x0000003255a31d10 abort + 272
> 5  libc.so.6       0x0000003255a296e6 __assert_fail + 246
> 6  llc             0x000000000133e387
> 7  llc             0x0000000000f1fca5 llvm::DwarfDebug::emitDebugInfo() + 255
> 8  llc             0x0000000000f2b9c6 llvm::DwarfDebug::endModule() + 1954
> 9  llc             0x0000000000f1502a llvm::AsmPrinter::doFinalization(llvm::Module&) + 790
> 10 llc             0x00000000012e595b llvm::FPPassManager::doFinalization(llvm::Module&) + 67
> 11 llc             0x00000000012e9f82 llvm::FPPassManager::runOnModule(llvm::Module&) + 120
> 12 llc             0x00000000012e9a47 llvm::MPPassManager::runOnModule(llvm::Module&) + 381
> 13 llc             0x00000000012eae89 llvm::PassManagerImpl::run(llvm::Module&) + 111
> 14 llc             0x00000000012eaeeb llvm::PassManager::run(llvm::Module&) + 33
> 15 llc             0x00000000009dfc6b main + 2201
> 16 libc.so.6       0x0000003255a1d994 __libc_start_main + 244
> 17 llc             0x00000000009de5c9
> Stack dump:
> 0.      Program arguments: /localhome/aggarwa4/llvm29/llvm-obj/Debug+Asserts/bin/llc Output/253.perlbmk.linked.rbc
> 1.      Running pass 'Function Pass Manager' on module 'Output/253.perlbmk.linked.rbc'.
> 
> Thanks,
> Arushi
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