[LLVMbugs] [Bug 2156] New: x86-64 test/CodeGen/X86/2006-05-02-InstrSched2.ll fails

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=2156

           Summary: x86-64  test/CodeGen/X86/2006-05-02-InstrSched2.ll fails
           Product: new-bugs
           Version: unspecified
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: edwintorok at gmail.com
                CC: llvmbugs at cs.uiuc.edu


Created an attachment (id=1547)
 --> (http://llvm.org/bugs/attachment.cgi?id=1547)
fail.bc to reproduce

When running make check on r48371, Linux x86-64:

FAIL: /home/edwin/llvm-svn/llvm/test/CodeGen/X86/2006-05-02-InstrSched2.ll
Failed with exit(1) at line 1
while running: llvm-upgrade <
/home/edwin/llvm-svn/llvm/test/CodeGen/X86/2006-05-02-InstrSched2.ll | llvm-as
| llc -march=x86 -stats |&  grep asm-printer | grep 13
child killed: segmentation violation
child process exited abnormally

If I run it manually I get:

$ llvm-upgrade <
/home/edwin/llvm-svn/llvm/test/CodeGen/X86/2006-05-02-InstrSched2.ll | llvm-as
| llc -march=x86 -stats |  grep asm-printer | grep 13
llc[0x9aed66]
/lib/libc.so.6[0x3932831f70]
llc[0x82db2f]
llc(_ZN4llvm19MachineFunctionPass13runOnFunctionERNS_8FunctionE+0x29)[0x5f00e9]
llc(_ZN4llvm13FPPassManager13runOnFunctionERNS_8FunctionE+0x231)[0x94ca11]
llc(_ZN4llvm23FunctionPassManagerImpl3runERNS_8FunctionE+0x1c9)[0x94d639]
llc(_ZN4llvm19FunctionPassManager3runERNS_8FunctionE+0x31)[0x94d791]
llc(main+0x993)[0x4b42d3]
/lib/libc.so.6(__libc_start_main+0xfa)[0x393281e1ea]
llc(cos+0xf1)[0x4b1cd9]

If I remove either of '-stats' or 'o -' option from llc it doesn't crash
anymore.

I tried to get a reduced testcase with bugpoint, but running llc on
bugpoint-reduced-simplified.bc didn't reproduce the crash (although it was
crashing when called from bugpoint).

Here's a backtrace from a debug build (on x86-64, Linux):
(gdb) r -march=x86 fail.bc -f -o - -stats
Starting program: /home/edwin/llvm-svn/llvm/Debug/bin/llc -march=x86 fail.bc -f
-o - -stats
[Thread debugging using libthread_db enabled]
[New Thread 0x7f294d0c76f0 (LWP 14326)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7f294d0c76f0 (LWP 14326)]
0x000000000089e16a in llvm::ilist_traits<llvm::MachineInstr>::getNext (N=0x91)
    at /home/edwin/llvm-svn/llvm/include/llvm/CodeGen/MachineBasicBlock.h:37
37        static MachineInstr* getNext(MachineInstr* N) { return N->Next; }
(gdb) bt
#0  0x000000000089e16a in llvm::ilist_traits<llvm::MachineInstr>::getNext
(N=0x91)
    at /home/edwin/llvm-svn/llvm/include/llvm/CodeGen/MachineBasicBlock.h:37
#1  0x000000000089f98c in llvm::ilist_iterator<llvm::MachineInstr>::operator*
(this=0x7fff550ed080)
    at /home/edwin/llvm-svn/llvm/include/llvm/ADT/ilist:121
#2  0x000000000089f9d3 in llvm::ilist_iterator<llvm::MachineInstr>::operator->
(this=0x7fff550ed080)
    at /home/edwin/llvm-svn/llvm/include/llvm/ADT/ilist:124
#3  0x0000000000ae0837 in runOnMachineFunction (this=0x1157a40, MF=@0x115f7a0)
at TwoAddressInstructionPass.cpp:204
#4  0x0000000000898ae9 in llvm::MachineFunctionPass::runOnFunction
(this=0x1157a40, F=@0x11454c0)
    at /home/edwin/llvm-svn/llvm/include/llvm/CodeGen/MachineFunctionPass.h:41
#5  0x0000000000c17e76 in llvm::FPPassManager::runOnFunction (this=0x1149760,
F=@0x11454c0) at PassManager.cpp:1167
#6  0x0000000000c1809c in llvm::FunctionPassManagerImpl::run (this=0x1144830,
F=@0x11454c0) at PassManager.cpp:1125
#7  0x0000000000c181fa in llvm::FunctionPassManager::run (this=0x7fff550ed320,
F=@0x11454c0) at PassManager.cpp:1070
#8  0x000000000077d1dc in main (argc=7, argv=0x7fff550ed548) at llc.cpp:296
(gdb)


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