Created attachment 18135 [details]
Bugpoint reduced LLVM IR

$ clang --version
clang version 5.0.0 (https://github.com/llvm-mirror/clang.git 22ceb362cdbd367ec680a2960dbc0904d7531868) (https://github.com/llvm-mirror/llvm.git 56d588a7751d9c013d20d8820be103f57cbba191)
Target: x86_64-unknown-linux-gnu
Thread model: posix

$ llc -march=amdgcn -mcpu=fiji bugpoint-reduced-simplified.ll
#0 0x00007f5c1d4bedea llvm::sys::PrintStackTrace(llvm::raw_ostream&) (/usr/local/bin/../lib64/libLLVMSupport.so.5+0xe5dea)
#1 0x00007f5c1d4bcf7e llvm::sys::RunSignalHandlers() (/usr/local/bin/../lib64/libLLVMSupport.so.5+0xe3f7e)
#2 0x00007f5c1d4bd0a2 SignalHandler(int) (/usr/local/bin/../lib64/libLLVMSupport.so.5+0xe40a2)
#3 0x00007f5c1cf535c0 __restore_rt (/lib64/libpthread.so.0+0x115c0)
#4 0x00007f5c1df60663 llvm::SplitEditor::removeBackCopies(llvm::SmallVectorImpl<llvm::VNInfo*>&) (/usr/local/bin/../lib64/libLLVMCodeGen.so.5+0x2dd663)
#5 0x00007f5c1df62288 llvm::SplitEditor::hoistCopies() (/usr/local/bin/../lib64/libLLVMCodeGen.so.5+0x2df288)
#6 0x00007f5c1df630f0 llvm::SplitEditor::finish(llvm::SmallVectorImpl<unsigned int>*) (/usr/local/bin/../lib64/libLLVMCodeGen.so.5+0x2e00f0)
#7 0x00007f5c1defd97f (anonymous namespace)::RAGreedy::selectOrSplitImpl(llvm::LiveInterval&, llvm::SmallVectorImpl<unsigned int>&, llvm::SmallSet<unsigned int, 16u, std::less<unsigned int> >&, unsigned int) (/usr/local/bin/../lib64/libLLVMCodeGen.so.5+0x27a97f)
#8 0x00007f5c1defe338 (anonymous namespace)::RAGreedy::selectOrSplit(llvm::LiveInterval&, llvm::SmallVectorImpl<unsigned int>&) (/usr/local/bin/../lib64/libLLVMCodeGen.so.5+0x27b338)
#9 0x00007f5c1deea1e0 llvm::RegAllocBase::allocatePhysRegs() (/usr/local/bin/../lib64/libLLVMCodeGen.so.5+0x2671e0)
#10 0x00007f5c1def9c11 (anonymous namespace)::RAGreedy::runOnMachineFunction(llvm::MachineFunction&) (/usr/local/bin/../lib64/libLLVMCodeGen.so.5+0x276c11)
#11 0x00007f5c1de3c961 llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (/usr/local/bin/../lib64/libLLVMCodeGen.so.5+0x1b9961)
#12 0x00007f5c1db78c02 llvm::FPPassManager::runOnFunction(llvm::Function&) (/usr/local/bin/../lib64/libLLVMCore.so.5+0x14cc02)
#13 0x00007f5c1db78c93 llvm::FPPassManager::runOnModule(llvm::Module&) (/usr/local/bin/../lib64/libLLVMCore.so.5+0x14cc93)
#14 0x00007f5c1db795d7 llvm::legacy::PassManagerImpl::run(llvm::Module&) (/usr/local/bin/../lib64/libLLVMCore.so.5+0x14d5d7)
#15 0x0000000000418252 (llc+0x418252)
#16 0x000000000040dbb0 (llc+0x40dbb0)
#17 0x00007f5c1c2f2401 __libc_start_main (/lib64/libc.so.6+0x20401)
#18 0x000000000040dd8a (llc+0x40dd8a)
Stack dump:
0.	Program arguments: llc -march=amdgcn -mcpu=fiji bugpoint-reduced-simplified.ll 
1.	Running pass 'Function Pass Manager' on module 'bugpoint-reduced-simplified.ll'.
2.	Running pass 'Greedy Register Allocator' on function '@dtrmmBlock'
Segmentation fault (core dumped)