[llvm-bugs] [Bug 32688] New: RegCoalescer asserts during joinSubRanges

Mon Apr 17 15:03:48 PDT 2017

https://bugs.llvm.org/show_bug.cgi?id=32688

            Bug ID: 32688
           Summary: RegCoalescer asserts during joinSubRanges
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Register Allocator
          Assignee: unassignedbugs at nondot.org
          Reporter: Matthew.Arsenault at amd.com
                CC: llvm-bugs at lists.llvm.org

Created attachment 18295
  --> https://bugs.llvm.org/attachment.cgi?id=18295&action=edit
testcase

llc: ../lib/CodeGen/RegisterCoalescer.cpp:2212: JoinVals::ConflictResolution
(anonymous namespace)::JoinVals::analyzeValue(unsigned int, (anonymous
namespace)::JoinVals &): Assertion `DefMI != nullptr' failed.
#0 0x0000000002c919b9 llvm::sys::PrintStackTrace(llvm::raw_ostream&)
/home/marsenau/src/lightning/llvm/build_debug/../lib/Support/Unix/Signals.inc:398:11
#1 0x0000000002c91b69 PrintStackTraceSignalHandler(void*)
/home/marsenau/src/lightning/llvm/build_debug/../lib/Support/Unix/Signals.inc:462:1
#2 0x0000000002c90203 llvm::sys::RunSignalHandlers()
/home/marsenau/src/lightning/llvm/build_debug/../lib/Support/Signals.cpp:44:5
#3 0x0000000002c91ec4 SignalHandler(int)
/home/marsenau/src/lightning/llvm/build_debug/../lib/Support/Unix/Signals.inc:252:1
#4 0x00007f46a3d17390 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x11390)
#5 0x00007f46a2882428 gsignal
/build/glibc-9tT8Do/glibc-2.23/signal/../sysdeps/unix/sysv/linux/raise.c:54:0
#6 0x00007f46a288402a abort /build/glibc-9tT8Do/glibc-2.23/stdlib/abort.c:91:0
#7 0x00007f46a287abd7 __assert_fail_base
/build/glibc-9tT8Do/glibc-2.23/assert/assert.c:92:0
#8 0x00007f46a287ac82 (/lib/x86_64-linux-gnu/libc.so.6+0x2dc82)
#9 0x00000000021f5575 (anonymous namespace)::JoinVals::analyzeValue(unsigned
int, (anonymous namespace)::JoinVals&)
/home/marsenau/src/lightning/llvm/build_debug/../lib/CodeGen/RegisterCoalescer.cpp:2213:9
#10 0x00000000021f4a02 (anonymous
namespace)::JoinVals::computeAssignment(unsigned int, (anonymous
namespace)::JoinVals&)
/home/marsenau/src/lightning/llvm/build_debug/../lib/CodeGen/RegisterCoalescer.cpp:2424:12
#11 0x00000000021f1e59 (anonymous namespace)::JoinVals::mapValues((anonymous
namespace)::JoinVals&)
/home/marsenau/src/lightning/llvm/build_debug/../lib/CodeGen/RegisterCoalescer.cpp:2459:5
#12 0x00000000021f7431 (anonymous
namespace)::RegisterCoalescer::joinSubRegRanges(llvm::LiveRange&,
llvm::LiveRange&, llvm::LaneBitmask, llvm::CoalescerPair const&)
/home/marsenau/src/lightning/llvm/build_debug/../lib/CodeGen/RegisterCoalescer.cpp:2848:35
#13 0x00000000021f7207 (anonymous
namespace)::RegisterCoalescer::mergeSubRangeInto(llvm::LiveInterval&,
llvm::LiveRange const&, llvm::LaneBitmask,
llvm::CoalescerPair&)::$_2::operator()(llvm::LiveInterval::SubRange&) const
/home/marsenau/src/lightning/llvm/build_debug/../lib/CodeGen/RegisterCoalescer.cpp:2908:7
#14 0x00000000021f6fe2 std::_Function_handler<void
(llvm::LiveInterval::SubRange&), (anonymous
namespace)::RegisterCoalescer::mergeSubRangeInto(llvm::LiveInterval&,
llvm::LiveRange const&, llvm::LaneBitmask,
llvm::CoalescerPair&)::$_2>::_M_invoke(std::_Any_data const&,
llvm::LiveInterval::SubRange&)
/usr/bin/../lib/gcc/x86_64-linux-gnu/5.4.0/../../../../include/c++/5.4.0/functional:1873:7
#15 0x0000000002010e68 std::function<void
(llvm::LiveInterval::SubRange&)>::operator()(llvm::LiveInterval::SubRange&)
const
/usr/bin/../lib/gcc/x86_64-linux-gnu/5.4.0/../../../../include/c++/5.4.0/functional:2267:7
#16 0x000000000200baf3
llvm::LiveInterval::refineSubRanges(llvm::BumpPtrAllocatorImpl<llvm::MallocAllocator,
4096ul, 4096ul>&, llvm::LaneBitmask, std::function<void
(llvm::LiveInterval::SubRange&)>)
/home/marsenau/src/lightning/llvm/build_debug/../lib/CodeGen/LiveInterval.cpp:887:5
#17 0x00000000021f2afb (anonymous
namespace)::RegisterCoalescer::mergeSubRangeInto(llvm::LiveInterval&,
llvm::LiveRange const&, llvm::LaneBitmask, llvm::CoalescerPair&)
/home/marsenau/src/lightning/llvm/build_debug/../lib/CodeGen/RegisterCoalescer.cpp:2901:3
#18 0x00000000021f15ff (anonymous
namespace)::RegisterCoalescer::joinVirtRegs(llvm::CoalescerPair&)
/home/marsenau/src/lightning/llvm/build_debug/../lib/CodeGen/RegisterCoalescer.cpp:2965:5
#19 0x00000000021ed430 (anonymous
namespace)::RegisterCoalescer::joinIntervals(llvm::CoalescerPair&)
/home/marsenau/src/lightning/llvm/build_debug/../lib/CodeGen/RegisterCoalescer.cpp:3026:50
#20 0x00000000021ea848 (anonymous
namespace)::RegisterCoalescer::joinCopy(llvm::MachineInstr*, bool&)
/home/marsenau/src/lightning/llvm/build_debug/../lib/CodeGen/RegisterCoalescer.cpp:1622:7
#21 0x00000000021e8a82 (anonymous
namespace)::RegisterCoalescer::copyCoalesceWorkList(llvm::MutableArrayRef<llvm::MachineInstr*>)
/home/marsenau/src/lightning/llvm/build_debug/../lib/CodeGen/RegisterCoalescer.cpp:3097:10
#22 0x00000000021e8190 (anonymous
namespace)::RegisterCoalescer::coalesceLocals()
/home/marsenau/src/lightning/llvm/build_debug/../lib/CodeGen/RegisterCoalescer.cpp:3222:17
#23 0x00000000021e7b6e (anonymous
namespace)::RegisterCoalescer::joinAllIntervals()
/home/marsenau/src/lightning/llvm/build_debug/../lib/CodeGen/RegisterCoalescer.cpp:3247:7
#24 0x00000000021e725b (anonymous
namespace)::RegisterCoalescer::runOnMachineFunction(llvm::MachineFunction&)
/home/marsenau/src/lightning/llvm/build_debug/../lib/CodeGen/RegisterCoalescer.cpp:3302:18
#25 0x00000000020a0561
llvm::MachineFunctionPass::runOnFunction(llvm::Function&)
/home/marsenau/src/lightning/llvm/build_debug/../lib/CodeGen/MachineFunctionPass.cpp:62:8
#26 0x00000000024c1e9f llvm::FPPassManager::runOnFunction(llvm::Function&)
/home/marsenau/src/lightning/llvm/build_debug/../lib/IR/LegacyPassManager.cpp:1513:23
#27 0x00000000024c21b5 llvm::FPPassManager::runOnModule(llvm::Module&)
/home/marsenau/src/lightning/llvm/build_debug/../lib/IR/LegacyPassManager.cpp:1534:16
#28 0x00000000024c294a (anonymous
namespace)::MPPassManager::runOnModule(llvm::Module&)
/home/marsenau/src/lightning/llvm/build_debug/../lib/IR/LegacyPassManager.cpp:1590:23
#29 0x00000000024c2476 llvm::legacy::PassManagerImpl::run(llvm::Module&)
/home/marsenau/src/lightning/llvm/build_debug/../lib/IR/LegacyPassManager.cpp:1693:16
#30 0x00000000024c2e61 llvm::legacy::PassManager::run(llvm::Module&)
/home/marsenau/src/lightning/llvm/build_debug/../lib/IR/LegacyPassManager.cpp:1724:3
#31 0x0000000000a0b422 compileModule(char**, llvm::LLVMContext&)
/home/marsenau/src/lightning/llvm/build_debug/../tools/llc/llc.cpp:579:42
#32 0x0000000000a09784 main
/home/marsenau/src/lightning/llvm/build_debug/../tools/llc/llc.cpp:331:13
#33 0x00007f46a286d830 __libc_start_main
/build/glibc-9tT8Do/glibc-2.23/csu/../csu/libc-start.c:325:0
#34 0x0000000000a090a9 _start
(/home/marsenau/src/lightning/llvm/build_debug/bin/llc+0xa090a9)
Stack dump:
0.      Program arguments:
/home/marsenau/src/lightning/llvm/build_debug/bin/llc -verify-machineinstrs -o
- reg-coalescer-crash.ll 
1.      Running pass 'Function Pass Manager' on module
'reg-coalescer-crash.ll'.
2.      Running pass 'Simple Register Coalescing' on function
'@defmi_null_assert'

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