llc crash in an rather innocent bitcode

[whchung]

Overview

llc fails to lower a seemly legitimate bitcode. The same bitcode works fine in SPIR path.

Test case archive

https://multicorewareinc.egnyte.com/h-s/20140724/UIdC4tbXko

Test case

2_Cxx_Lang_Exte_2_x_general_Statements_ControlFlow_Test.21

Command

llc -O2 -march=hsail-64 -o kernel.brig kernel.cl.opt.bc

Error Message

0 llc 0x00000000012ea0ff
1 llc 0x00000000012e9df8
2 libpthread.so.0 0x00007f52885c0340
3 llc 0x000000000115a716 llvm::DomTreeNodeBasellvm::BasicBlock::getBlock read_only() + 12
4 llc 0x000000000098de01 llvm::HSAILControlDependencyAnalysis::runOnMachineFunction(llvm::MachineFunction&) + 331
5 llc 0x0000000000df936b llvm::MachineFunctionPass::runOnFunction(llvm::Function&) + 95
6 llc 0x00000000011fa8b1 llvm::FPPassManager::runOnFunction(llvm::Function&) + 289
7 llc 0x00000000011faa70 llvm::FPPassManager::runOnModule(llvm::Module&) + 102
8 llc 0x00000000011fad69 llvm::MPPassManager::runOnModule(llvm::Module&) + 395
9 llc 0x00000000011fb2cc llvm::PassManagerImpl::run(llvm::Module&) + 120
10 llc 0x00000000011fb4ad llvm::PassManager::run(llvm::Module&) + 39
11 llc 0x00000000008a9fb3 main + 4398
12 libc.so.6 0x00007f52879e1ec5 __libc_start_main + 245
13 llc 0x00000000008a8837
Stack dump:
0. Program arguments: /opt/amd/bin/llc -march=hsail-64 kernel.cl.opt.ll -o kernel.brig

1. Running pass 'Function Pass Manager' on module 'kernel.cl.opt.ll'.
2. Running pass 'HSAIL control dependency analysis' on function '@ZZ9test_mainvEN3_EC__419__cxxamp_trampolineE_3iiiiiiPiN11Concurrency11access_typeE'