Debug llc crash using bugpoint

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1

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::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

2

Do something like this:

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

Cameron

3

That worked.
Thanks!