[LLVMdev] Use of blockadress() crashes llc in some cases

[Chris Lattner]

On Mar 19, 2010, at 7:11 AM, Sebastian Schlunke wrote:

> Hi!
> 
> In some cases the use of blockaddress() crashes llc. 
> 
> I've attached two test-cases, one that crashes and for reference a slightly modified one (just 2 lines are commented) that works. 

This works for me with mainline now, I think I fixed a similar bug recently.  In general, please file bugs against bugzilla, it is easier to track than in email.  Thanks!

-Chris

> 
> I compile the files with 
> 	# llvm-as test_crash.ll -o - | llc -f -o temp.s -
> 
> and get
> 
> 0  llc             0x0000000000c6ab6f
> 1  llc             0x0000000000c6b38d
> 2  libpthread.so.0 0x00007feccd2270f0
> 3  llc             0x00000000009a270f llvm::DenseMap<llvm::AssertingVH<llvm::BasicBlock>, llvm::MMIAddrLabelMap::AddrLabelSymEntry, llvm::DenseMapInfo<llvm::AssertingVH<llvm::BasicBlock> >, llvm::DenseMapInfo<llvm::MMIAddrLabelMap::AddrLabelSymEntry> >::operator[](llvm::AssertingVH<llvm::BasicBlock> const&) + 31
> 4  llc             0x000000000099f5d0 llvm::MMIAddrLabelMap::UpdateForRAUWBlock(llvm::BasicBlock*, llvm::BasicBlock*) + 64
> 5  llc             0x0000000000c10c9a llvm::ValueHandleBase::ValueIsRAUWd(llvm::Value*, llvm::Value*) + 442
> 6  llc             0x0000000000c11115 llvm::Value::uncheckedReplaceAllUsesWith(llvm::Value*) + 261
> 7  llc             0x0000000000ac86da llvm::MergeBasicBlockIntoOnlyPred(llvm::BasicBlock*, llvm::Pass*) + 186
> 8  llc             0x0000000000a8780f
> 9  llc             0x0000000000a8830b
> 10 llc             0x0000000000a89cd6
> 11 llc             0x0000000000bfdf16 llvm::FPPassManager::runOnFunction(llvm::Function&) + 534
> 12 llc             0x0000000000bfe0f1 llvm::FunctionPassManagerImpl::run(llvm::Function&) + 129
> 13 llc             0x0000000000bfe31e llvm::FunctionPassManager::run(llvm::Function&) + 110
> 14 llc             0x000000000052d334 main + 3556
> 15 libc.so.6       0x00007feccc311a3d __libc_start_main + 253
> 16 llc             0x000000000052b039
> Stack dump:
> 0.      Program arguments: llc -f -o temp.s - 
> 1.      Running pass 'Optimize for code generation' on function '@reduce_graph'
> Segmentation fault
> 
> I'm using the svn-version, revision 98581.
> 
> Regards,
> Sebastian
> <test_working.ll><test_crash.ll>_______________________________________________
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