[LLVMbugs] [Bug 7707] New: Assertion in TwoAddressInstructionPass

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=7707

           Summary: Assertion in TwoAddressInstructionPass
           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=5261)
 --> (http://llvm.org/bugs/attachment.cgi?id=5261)
Testcase

Consider the attached .ll file.

Running llc -O0 yields:

$ ./llc -O0 bugpoint-reduced-simplified2.ll 
Assertion failed: (i < getNumOperands() && "getOperand() out of range!"),
function getOperand, file
/Users/asl/Projects/llvm/src-git/include/llvm/CodeGen/MachineInstr.h, line 159.
0  llc               0x00000001006f3430 PrintStackTrace(void*) + 38
1  llc               0x00000001006f393e SignalHandler(int) + 254
2  libSystem.B.dylib 0x00007fff83fbf35a _sigtramp + 26
3  libSystem.B.dylib 0x0000000101f12760 _sigtramp + 2113221664
4  libSystem.B.dylib 0x00007fff8403a9b4 __pthread_markcancel + 0
5  llc               0x00000001000ae31d llvm::MachineInstr::getOperand(unsigned
int) const + 79
6  llc               0x000000010037c832
llvm::MachineInstr::isRegTiedToDefOperand(unsigned int, unsigned int*) const +
604
7  llc               0x0000000100466d6d (anonymous
namespace)::TwoAddressInstructionPass::runOnMachineFunction(llvm::MachineFunction&)
+ 1249
8  llc               0x000000010037b057
llvm::MachineFunctionPass::runOnFunction(llvm::Function&) + 85
9  llc               0x0000000100649846
llvm::FPPassManager::runOnFunction(llvm::Function&) + 348
10 llc               0x0000000100649a19
llvm::FPPassManager::runOnModule(llvm::Module&) + 81
11 llc               0x0000000100649518
llvm::MPPassManager::runOnModule(llvm::Module&) + 384
12 llc               0x000000010064acc1
llvm::PassManagerImpl::run(llvm::Module&) + 111
13 llc               0x000000010064ad23 llvm::PassManager::run(llvm::Module&) +
33
14 llc               0x00000001000252fb main + 2143
15 llc               0x00000001000242a4 start + 52
16 llc               0x0000000000000003 start + 4294819219

The problem seems to be hidden by -ON with N > 0

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