[llvm-bugs] [Bug 27856] New: Crash in handleMove during scheduling of OpenCV kernel

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=27856

            Bug ID: 27856
           Summary: Crash in handleMove during scheduling of OpenCV kernel
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Register Allocator
          Assignee: unassignedbugs at nondot.org
          Reporter: Matthew.Arsenault at amd.com
                CC: llvm-bugs at lists.llvm.org, matze at braunis.de
    Classification: Unclassified

Created attachment 16406
  --> https://llvm.org/bugs/attachment.cgi?id=16406&action=edit
Testcase with new opt passes run

This crashes the original testcase when http://reviews.llvm.org/D20304 is
applied.

A reduced version hits a verifier error instead after scheduling.




llc: /home/matt/src/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp:1066: void
llvm::LiveIntervals::HMEditor::handleMoveDown(llvm::LiveRange&): Assertion
`OldIdxVNI->def == OldIdxOut->start && "Inconsistent def"' failed.

Program received signal SIGABRT, Aborted.
0x00007ffff671e295 in raise () from /usr/lib/libc.so.6
(gdb) bt
#0  0x00007ffff671e295 in raise () from /usr/lib/libc.so.6
#1  0x00007ffff671f6da in abort () from /usr/lib/libc.so.6
#2  0x00007ffff6717297 in __assert_fail_base () from /usr/lib/libc.so.6
#3  0x00007ffff6717342 in __assert_fail () from /usr/lib/libc.so.6
#4  0x0000000001d74af7 in llvm::LiveIntervals::HMEditor::handleMoveDown
(this=0x7fffffffca00, LR=...) at
/home/matt/src/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp:1066
#5  0x0000000001d7465a in llvm::LiveIntervals::HMEditor::updateRange
(this=0x7fffffffca00, LR=..., Reg=2147484174, LaneMask=0) at
/home/matt/src/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp:996
#6  0x0000000001d74394 in llvm::LiveIntervals::HMEditor::updateAllRanges
(this=0x7fffffffca00, MI=0x46a3ec0) at
/home/matt/src/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp:964
#7  0x0000000001d71bc2 in llvm::LiveIntervals::handleMove (this=0x461bd00,
MI=..., UpdateFlags=true) at
/home/matt/src/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp:1380
#8  0x0000000001e23f1d in llvm::ScheduleDAGMI::moveInstruction (this=0x46dd0d0,
MI=0x46a3ec0, InsertPos=...) at
/home/matt/src/llvm/lib/CodeGen/MachineScheduler.cpp:655
#9  0x0000000001e279f1 in llvm::ScheduleDAGMILive::scheduleMI (this=0x46dd0d0,
SU=0x46ecbc0, IsTopNode=false) at
/home/matt/src/llvm/lib/CodeGen/MachineScheduler.cpp:1327
#10 0x0000000001e26973 in llvm::ScheduleDAGMILive::schedule (this=0x46dd0d0) at
/home/matt/src/llvm/lib/CodeGen/MachineScheduler.cpp:1122
#11 0x0000000001e23690 in (anonymous
namespace)::MachineSchedulerBase::scheduleRegions (this=0x461c650,
Scheduler=..., FixKillFlags=false) at
/home/matt/src/llvm/lib/CodeGen/MachineScheduler.cpp:492
#12 0x0000000001e22a52 in (anonymous
namespace)::MachineScheduler::runOnMachineFunction (this=0x461c650, mf=...) at
/home/matt/src/llvm/lib/CodeGen/MachineScheduler.cpp:357
#13 0x0000000001decb98 in llvm::MachineFunctionPass::runOnFunction
(this=0x461c690, F=...) at
/home/matt/src/llvm/lib/CodeGen/MachineFunctionPass.cpp:60
#14 0x00000000020f2957 in llvm::FPPassManager::runOnFunction (this=0x45d1d80,
F=...) at /home/matt/src/llvm/lib/IR/LegacyPassManager.cpp:1526
#15 0x00000000020f2ace in llvm::FPPassManager::runOnModule (this=0x45d1d80,
M=...) at /home/matt/src/llvm/lib/IR/LegacyPassManager.cpp:1547
#16 0x00000000020f2e1b in (anonymous namespace)::MPPassManager::runOnModule
(this=0x45ed4b0, M=...) at
/home/matt/src/llvm/lib/IR/LegacyPassManager.cpp:1603
#17 0x00000000020f34cd in llvm::legacy::PassManagerImpl::run (this=0x45e9c40,
M=...) at /home/matt/src/llvm/lib/IR/LegacyPassManager.cpp:1706
#18 0x00000000020f36d9 in llvm::legacy::PassManager::run (this=0x7fffffffd5a0,
M=...) at /home/matt/src/llvm/lib/IR/LegacyPassManager.cpp:1737
#19 0x0000000000d2bcfe in compileModule (argv=0x7fffffffdfe8, Context=...) at
/home/matt/src/llvm/tools/llc/llc.cpp:465
#20 0x0000000000d2a804 in main (argc=8, argv=0x7fffffffdfe8) at
/home/matt/src/llvm/tools/llc/llc.cpp:244

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