[llvm-bugs] [Bug 28083] New: Couldn't join subrange crash in OpenCV Arithm/Log test

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=28083

            Bug ID: 28083
           Summary: Couldn't join subrange crash in OpenCV Arithm/Log test
           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 16511
  --> https://llvm.org/bugs/attachment.cgi?id=16511&action=edit
Semi-reduced crashing testcase

RegisterCoalescer crashes on this. -verify-machineinstrs catches an error
before this.

*** Couldn't join subrange!

UNREACHABLE executed at
/home/matt/src/llvm/lib/CodeGen/RegisterCoalescer.cpp:2567!
#0 0x00000000025c88b8 llvm::sys::PrintStackTrace(llvm::raw_ostream&)
/home/matt/src/llvm/lib/Support/Unix/Signals.inc:402:0
#1 0x00000000025c8c76 PrintStackTraceSignalHandler(void*)
/home/matt/src/llvm/lib/Support/Unix/Signals.inc:470:0
#2 0x00000000025c6f98 llvm::sys::RunSignalHandlers()
/home/matt/src/llvm/lib/Support/Signals.cpp:44:0
#3 0x00000000025c820a SignalHandler(int)
/home/matt/src/llvm/lib/Support/Unix/Signals.inc:256:0
#4 0x00007fd34769cef0 __restore_rt (/usr/lib/libpthread.so.0+0x10ef0)
#5 0x00007fd346867295 __GI_raise (/usr/lib/libc.so.6+0x33295)
#6 0x00007fd3468686da __GI_abort (/usr/lib/libc.so.6+0x346da)
#7 0x0000000002562655 bindingsErrorHandler(void*,
std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >
const&, bool) /home/matt/src/llvm/lib/Support/ErrorHandling.cpp:127:0
#8 0x0000000001ebd6ff (anonymous
namespace)::RegisterCoalescer::joinSubRegRanges(llvm::LiveRange&,
llvm::LiveRange&, unsigned int, llvm::CoalescerPair const&)
/home/matt/src/llvm/lib/CodeGen/RegisterCoalescer.cpp:2574:0
#9 0x0000000001ebdcb0 (anonymous
namespace)::RegisterCoalescer::mergeSubRangeInto(llvm::LiveInterval&,
llvm::LiveRange const&, unsigned int, llvm::CoalescerPair&)
/home/matt/src/llvm/lib/CodeGen/RegisterCoalescer.cpp:2630:0
#10 0x0000000001ebe43a (anonymous
namespace)::RegisterCoalescer::joinVirtRegs(llvm::CoalescerPair&)
/home/matt/src/llvm/lib/CodeGen/RegisterCoalescer.cpp:2693:0
#11 0x0000000001ebe84c (anonymous
namespace)::RegisterCoalescer::joinIntervals(llvm::CoalescerPair&)
/home/matt/src/llvm/lib/CodeGen/RegisterCoalescer.cpp:2742:0
#12 0x0000000001eb8461 (anonymous
namespace)::RegisterCoalescer::joinCopy(llvm::MachineInstr*, bool&)
/home/matt/src/llvm/lib/CodeGen/RegisterCoalescer.cpp:1456:0
#13 0x0000000001ebeb9c (anonymous
namespace)::RegisterCoalescer::copyCoalesceWorkList(llvm::MutableArrayRef<llvm::MachineInstr*>)
/home/matt/src/llvm/lib/CodeGen/RegisterCoalescer.cpp:2812:0
#14 0x0000000001ebf614 (anonymous
namespace)::RegisterCoalescer::coalesceLocals()
/home/matt/src/llvm/lib/CodeGen/RegisterCoalescer.cpp:2938:0
#15 0x0000000001ebfa7e (anonymous
namespace)::RegisterCoalescer::joinAllIntervals()
/home/matt/src/llvm/lib/CodeGen/RegisterCoalescer.cpp:2972:0
#16 0x0000000001ebfdd9 (anonymous
namespace)::RegisterCoalescer::runOnMachineFunction(llvm::MachineFunction&)
/home/matt/src/llvm/lib/CodeGen/RegisterCoalescer.cpp:3018:0
#17 0x0000000001de26ba
llvm::MachineFunctionPass::runOnFunction(llvm::Function&)
/home/matt/src/llvm/lib/CodeGen/MachineFunctionPass.cpp:60:0

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