[LLVMbugs] [Bug 10842] New: [AVX, llc] Assertion failed: (Bits != 0 && "Cannot print this instruction."), function printInstruction

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=10842

           Summary: [AVX,llc] Assertion failed: (Bits != 0 && "Cannot
                    print this instruction."), function printInstruction
           Product: new-bugs
           Version: unspecified
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: matt at pharr.org
                CC: llvmbugs at cs.uiuc.edu


Created an attachment (id=7205)
 --> (http://llvm.org/bugs/attachment.cgi?id=7205)
test case

With the attached, I'm seeing the following crash.  Note that if -O0 is not
specified, there is no crash (so presumably the trigger is being optimized
out.)

% llc -O0 -mattr=+avx bugpoint-reduced-simplified.ll -o /dev/null

Assertion failed: (Bits != 0 && "Cannot print this instruction."), function
printInstruction, file
/Users/mmp/llvm-dev-src/lib/Target/X86/InstPrinter/../X86GenAsmWriter.inc, line
3995.
0  llc               0x0000000100bd0082
llvm::PrettyStackTraceProgram::~PrettyStackTraceProgram() + 6504
1  llc               0x0000000100bd0689
llvm::PrettyStackTraceProgram::~PrettyStackTraceProgram() + 8047
2  libsystem_c.dylib 0x00007fff885e8cfa _sigtramp + 26
3  libsystem_c.dylib 0x00007fff60150820 _sigtramp + 18446744073033644864
4  llc               0x0000000100bcffe6
llvm::PrettyStackTraceProgram::~PrettyStackTraceProgram() + 6348
5  llc               0x0000000100bd0038
llvm::PrettyStackTraceProgram::~PrettyStackTraceProgram() + 6430
6  llc               0x0000000100a7a62c llvm::MCRegisterInfo::~MCRegisterInfo()
+ 3584
7  llc               0x0000000100a7b822 llvm::MCRegisterInfo::~MCRegisterInfo()
+ 8182
8  llc               0x0000000100b6950c
llvm::ELFObjectWriter::String64(llvm::MCDataFragment&, unsigned long long) +
20734
9  llc               0x00000001006517fb llvm::X86JITInfo::~X86JITInfo() + 15751
10 llc               0x0000000100805231
llvm::TargetSelectionDAGInfo::EmitTargetCodeForMemset(llvm::SelectionDAG&,
llvm::DebugLoc, llvm::SDValue, llvm::SDValue, llvm::SDValue, llvm::SDValue,
unsigned int, bool, llvm::MachinePointerInfo) const + 27537
11 llc               0x00000001005a7977
llvm::df_iterator<llvm::MachineBasicBlock*,
llvm::SmallPtrSet<llvm::MachineBasicBlock*, 16u>, true,
llvm::GraphTraits<llvm::MachineBasicBlock*> >::toNext() + 561
12 llc               0x00000001008af284
llvm::MachineFunctionAnalysis::getPassName() const + 458
13 llc               0x0000000100b3713d llvm::cl::parser<llvm::PassInfo
const*>::~parser() + 26675
14 llc               0x0000000100b326db llvm::cl::parser<llvm::PassInfo
const*>::~parser() + 7633
15 llc               0x0000000100b36e3a llvm::cl::parser<llvm::PassInfo
const*>::~parser() + 25904
16 llc               0x0000000100b38251 llvm::cl::parser<llvm::PassInfo
const*>::~parser() + 31047
17 llc               0x0000000100b382d1 llvm::cl::parser<llvm::PassInfo
const*>::~parser() + 31175
18 llc               0x0000000100554273
19 llc               0x0000000100552b34
Stack dump:
0.    Program arguments: llc -O0 -mattr=+avx bugpoint-reduced-simplified.ll -o
/dev/null 
1.    Running pass 'Function Pass Manager' on module
'bugpoint-reduced-simplified.ll'.
2.    Running pass 'X86 AT&T-Style Assembly Printer' on function '@f_fu'
[1]    48762 illegal hardware instruction  llc -O0 -mattr=+avx
bugpoint-reduced-simplified.ll -o /dev/null

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