[mlir][openmp] -convert-openmp-to-llvm crashes in /usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/optional:438: _Tp &std::_Optional_base_impl<unsigned int, std::_Optional_base<unsigned int>>::_M_get() [_Tp = unsigned int, _Dp = std::_Optional_base<unsigned int>]: Assertion 'this->_M_is_engaged()' failed.

[anonymoususer-12]

git version: 761bf33

system: Ubuntu 18.04.6 LTS

reproduce with: mlir-opt -convert-openmp-to-llvm a.mlir
This test case also crashes in -convert-to-llvm\-finalize-memref-to-llvm\-gpu-to-llvm\-lower-host-to-llvm
a.mlir:

#map = affine_map<(d0) -> (d0)>
module {
  func.func @loop_nest_depth() {
    %alloc = memref.alloca() :memref<256x8xf32, #spirv.storage_class<Generic>>
    affine.for %arg0 = 0 to 32 step 4 {
      affine.for %arg1 = 0 to 8 step 2 {
        %0 = affine.apply #map(%arg1)
        %1 = affine.load %alloc[%arg0, %0] : memref<256x8xf32, #spirv.storage_class<Generic>>
      }
    }
    return
  }
}

stack trace:

/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/optional:438: _Tp &std::_Optional_base_impl<unsigned int, std::_Optional_base<unsigned int>>::_M_get() [_Tp = unsigned int, _Dp = std::_Optional_base<unsigned int>]: Assertion 'this->_M_is_engaged()' failed.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0.	Program arguments: /data/szy/MLIR/llvm-release/llvm-project/build/bin/mlir-opt -convert-openmp-to-llvm a.mlir
 #0 0x000055afe49e0128 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/data/szy/MLIR/llvm-release/llvm-project/build/bin/mlir-opt+0x10d7128)
 #1 0x000055afe49ddc3e llvm::sys::RunSignalHandlers() (/data/szy/MLIR/llvm-release/llvm-project/build/bin/mlir-opt+0x10d4c3e)
 #2 0x000055afe49e0abd SignalHandler(int) Signals.cpp:0:0
 #3 0x00007fc2e912c420 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x14420)
 #4 0x00007fc2e876900b raise /build/glibc-LcI20x/glibc-2.31/signal/../sysdeps/unix/sysv/linux/raise.c:51:1
 #5 0x00007fc2e8748859 abort /build/glibc-LcI20x/glibc-2.31/stdlib/abort.c:81:7
 #6 0x000055afe737e0ff (/data/szy/MLIR/llvm-release/llvm-project/build/bin/mlir-opt+0x3a750ff)
 #7 0x000055afe7391f70 mlir::AllocLikeOpLLVMLowering::matchAndRewrite(mlir::Operation*, llvm::ArrayRef<mlir::Value>, mlir::ConversionPatternRewriter&) const (/data/szy/MLIR/llvm-release/llvm-project/build/bin/mlir-opt+0x3a88f70)
 #8 0x000055afe7b30b11 mlir::ConversionPattern::matchAndRewrite(mlir::Operation*, mlir::PatternRewriter&) const (/data/szy/MLIR/llvm-release/llvm-project/build/bin/mlir-opt+0x4227b11)
 #9 0x000055afea4bbc91 void llvm::function_ref<void ()>::callback_fn<mlir::PatternApplicator::matchAndRewrite(mlir::Operation*, mlir::PatternRewriter&, llvm::function_ref<bool (mlir::Pattern const&)>, llvm::function_ref<void (mlir::Pattern const&)>, llvm::function_ref<llvm::LogicalResult (mlir::Pattern const&)>)::$_0>(long) PatternApplicator.cpp:0:0
#10 0x000055afea4b894b mlir::PatternApplicator::matchAndRewrite(mlir::Operation*, mlir::PatternRewriter&, llvm::function_ref<bool (mlir::Pattern const&)>, llvm::function_ref<void (mlir::Pattern const&)>, llvm::function_ref<llvm::LogicalResult (mlir::Pattern const&)>) (/data/szy/MLIR/llvm-release/llvm-project/build/bin/mlir-opt+0x6baf94b)
#11 0x000055afe7b31b53 (anonymous namespace)::OperationLegalizer::legalize(mlir::Operation*, mlir::ConversionPatternRewriter&) DialectConversion.cpp:0:0
#12 0x000055afe7b30bb7 mlir::OperationConverter::convert(mlir::ConversionPatternRewriter&, mlir::Operation*) (/data/szy/MLIR/llvm-release/llvm-project/build/bin/mlir-opt+0x4227bb7)
#13 0x000055afe7b31d7f mlir::OperationConverter::convertOperations(llvm::ArrayRef<mlir::Operation*>) (/data/szy/MLIR/llvm-release/llvm-project/build/bin/mlir-opt+0x4228d7f)
#14 0x000055afe7b3996b mlir::applyPartialConversion(mlir::Operation*, mlir::ConversionTarget const&, mlir::FrozenRewritePatternSet const&, mlir::ConversionConfig) (/data/szy/MLIR/llvm-release/llvm-project/build/bin/mlir-opt+0x423096b)
#15 0x000055afe73cc395 (anonymous namespace)::ConvertOpenMPToLLVMPass::runOnOperation() OpenMPToLLVM.cpp:0:0
#16 0x000055afe7ad22d6 mlir::detail::OpToOpPassAdaptor::run(mlir::Pass*, mlir::Operation*, mlir::AnalysisManager, bool, unsigned int) (/data/szy/MLIR/llvm-release/llvm-project/build/bin/mlir-opt+0x41c92d6)
#17 0x000055afe7ad2c40 mlir::detail::OpToOpPassAdaptor::runPipeline(mlir::OpPassManager&, mlir::Operation*, mlir::AnalysisManager, bool, unsigned int, mlir::PassInstrumentor*, mlir::PassInstrumentation::PipelineParentInfo const*) (/data/szy/MLIR/llvm-release/llvm-project/build/bin/mlir-opt+0x41c9c40)
#18 0x000055afe7ad5282 mlir::PassManager::run(mlir::Operation*) (/data/szy/MLIR/llvm-release/llvm-project/build/bin/mlir-opt+0x41cc282)
#19 0x000055afe7acdab1 performActions(llvm::raw_ostream&, std::shared_ptr<llvm::SourceMgr> const&, mlir::MLIRContext*, mlir::MlirOptMainConfig const&) MlirOptMain.cpp:0:0
#20 0x000055afe7acd70b llvm::LogicalResult llvm::function_ref<llvm::LogicalResult (std::unique_ptr<llvm::MemoryBuffer, std::default_delete<llvm::MemoryBuffer>>, llvm::raw_ostream&)>::callback_fn<mlir::MlirOptMain(llvm::raw_ostream&, std::unique_ptr<llvm::MemoryBuffer, std::default_delete<llvm::MemoryBuffer>>, mlir::DialectRegistry&, mlir::MlirOptMainConfig const&)::$_0>(long, std::unique_ptr<llvm::MemoryBuffer, std::default_delete<llvm::MemoryBuffer>>, llvm::raw_ostream&) MlirOptMain.cpp:0:0
#21 0x000055afe7b7a3a5 mlir::splitAndProcessBuffer(std::unique_ptr<llvm::MemoryBuffer, std::default_delete<llvm::MemoryBuffer>>, llvm::function_ref<llvm::LogicalResult (std::unique_ptr<llvm::MemoryBuffer, std::default_delete<llvm::MemoryBuffer>>, llvm::raw_ostream&)>, llvm::raw_ostream&, llvm::StringRef, llvm::StringRef) (/data/szy/MLIR/llvm-release/llvm-project/build/bin/mlir-opt+0x42713a5)
#22 0x000055afe7ac8b35 mlir::MlirOptMain(llvm::raw_ostream&, std::unique_ptr<llvm::MemoryBuffer, std::default_delete<llvm::MemoryBuffer>>, mlir::DialectRegistry&, mlir::MlirOptMainConfig const&) (/data/szy/MLIR/llvm-release/llvm-project/build/bin/mlir-opt+0x41bfb35)
#23 0x000055afe7ac8ddf mlir::MlirOptMain(int, char**, llvm::StringRef, llvm::StringRef, mlir::DialectRegistry&) (/data/szy/MLIR/llvm-release/llvm-project/build/bin/mlir-opt+0x41bfddf)
#24 0x000055afe7ac910e mlir::MlirOptMain(int, char**, llvm::StringRef, mlir::DialectRegistry&) (/data/szy/MLIR/llvm-release/llvm-project/build/bin/mlir-opt+0x41c010e)
#25 0x000055afe49c0d67 main (/data/szy/MLIR/llvm-release/llvm-project/build/bin/mlir-opt+0x10b7d67)
#26 0x00007fc2e874a083 __libc_start_main /build/glibc-LcI20x/glibc-2.31/csu/../csu/libc-start.c:342:3
#27 0x000055afe49c08ee _start (/data/szy/MLIR/llvm-release/llvm-project/build/bin/mlir-opt+0x10b78ee)