[LLVMbugs] [Bug 11095] New: Assertion in instruction selector

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=11095

           Summary: Assertion in instruction selector
           Product: libraries
           Version: trunk
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: Common Code Generator Code
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: asl at math.spbu.ru
                CC: llvmbugs at cs.uiuc.edu


Created an attachment (id=7425)
 --> (http://llvm.org/bugs/attachment.cgi?id=7425)
Testcase

Consider the attached testcase. Running llc yields:

$ ./llc 2.ll
Assertion failed: (InChain.getValueType() == MVT::Other && "Not a chain"),
function HandleMergeInputChains, file
/Users/asl/Projects/llvm/src/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp,
line 1749.
0  llc               0x000000010ca61d12 _ZL15PrintStackTracePv + 34
1  llc               0x000000010ca622f9 _ZL13SignalHandleri + 745
2  libsystem_c.dylib 0x00007fff91639cfa _sigtramp + 26
3  libsystem_c.dylib 000000000000000000 _sigtramp + 18446603338076939040
4  llc               0x000000010ca61f66 abort + 22
5  llc               0x000000010ca61f28 __assert_rtn + 56
6  llc               0x000000010c6061fb
_ZL22HandleMergeInputChainsRN4llvm15SmallVectorImplIPNS_6SDNodeEEEPNS_12SelectionDAGE
+ 1035
7  llc               0x000000010c604303
llvm::SelectionDAGISel::SelectCodeCommon(llvm::SDNode*, unsigned char const*,
unsigned int) + 11715
8  llc               0x000000010c42c6d9 (anonymous
namespace)::ARMDAGToDAGISel::Select(llvm::SDNode*) + 9001
9  llc               0x000000010c5fe34b
llvm::SelectionDAGISel::DoInstructionSelection() + 699
10 llc               0x000000010c5fd62c
llvm::SelectionDAGISel::CodeGenAndEmitDAG() + 4188
11 llc               0x000000010c5fb819
llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) + 265
12 llc               0x000000010c5fac8a
llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) + 970
13 llc               0x000000010c6f2cac
llvm::MachineFunctionPass::runOnFunction(llvm::Function&) + 60
14 llc               0x000000010c97445d
llvm::FPPassManager::runOnFunction(llvm::Function&) + 349
15 llc               0x000000010c97473b
llvm::FPPassManager::runOnModule(llvm::Module&) + 75
16 llc               0x000000010c974879
llvm::MPPassManager::runOnModule(llvm::Module&) + 265
17 llc               0x000000010c974e82
llvm::PassManagerImpl::run(llvm::Module&) + 290
18 llc               0x000000010c9753dd llvm::PassManager::run(llvm::Module&) +
13
19 llc               0x000000010c2476b5 main + 4725
20 llc               0x000000010c246434 start + 52
Stack dump:
0.    Program arguments: ./llc 2.ll 
1.    Running pass 'Function Pass Manager' on module '2.ll'.
2.    Running pass 'ARM Instruction Selection' on function '@baz'
Illegal instruction: 4

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