<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/118768>118768</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [mlir] -convert-scf-to-openmp crashes
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          wwy6191
      </td>
    </tr>
</table>

<pre>
    git version: adf892d743d91afc1af7893f97c770db31c26916

system: `Ubuntu 18.04.6 LTS`

reproduce with: `mlir-opt  -convert-scf-to-openmp a.mlir`


a.mlir:  
``` 
func.func @zero() {
  %c0 = arith.constant 0 : index
  %c1 = arith.constant 1 : index
  %zero = memref.alloca(%c0) : memref<?xf32>
  scf.parallel (%arg1) = (%c0) to (%c1) step (%c1) {
 scf.reduce(%c1 : index)
  }
  return
}

``` 
stack trace:

``` 
mlir-opt: /data/szy/MLIR/llvm-release/llvm-project/llvm/include/llvm/ADT/STLExtras.h:867: detail::zippy<detail::zip_first, T, U, Args...> llvm::zip_equal(T &&, U &&, Args &&...) [T = llvm::SmallVector<mlir::Value> &, U = mlir::OperandRange, Args = <llvm::SmallVector<mlir::omp::DeclareReductionOp> &>]: Assertion `all_equal({range_size(t), range_size(u), range_size(args)...}) && "Iteratees do not have equal length"' 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-scf-to-openmp /data/szy/MLIR/seed/seed0/tmp.5aUvt0PMsF.mlir
 #0 0x0000558a1107a048 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/data/szy/MLIR/llvm-release/llvm-project/build/bin/mlir-opt+0x1188048)
 #1 0x0000558a11077b5e llvm::sys::RunSignalHandlers() (/data/szy/MLIR/llvm-release/llvm-project/build/bin/mlir-opt+0x1185b5e)
 #2 0x0000558a1107a9dd SignalHandler(int) Signals.cpp:0:0
 #3 0x00007fdd9c7b0420 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x14420)
 #4 0x00007fdd9bded00b raise /build/glibc-LcI20x/glibc-2.31/signal/../sysdeps/unix/sysv/linux/raise.c:51:1
 #5 0x00007fdd9bdcc859 abort /build/glibc-LcI20x/glibc-2.31/stdlib/abort.c:81:7
 #6 0x00007fdd9bdcc729 get_sysdep_segment_value /build/glibc-LcI20x/glibc-2.31/intl/loadmsgcat.c:509:8
 #7 0x00007fdd9bdcc729 _nl_load_domain /build/glibc-LcI20x/glibc-2.31/intl/loadmsgcat.c:970:34
 #8 0x00007fdd9bdddfd6 (/lib/x86_64-linux-gnu/libc.so.6+0x33fd6)
 #9 0x0000558a13d87791 (anonymous namespace)::ParallelOpLowering::matchAndRewrite(mlir::scf::ParallelOp, mlir::PatternRewriter&) const SCFToOpenMP.cpp:0:0
#10 0x0000558a16fda851 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
#11 0x0000558a16fd751b 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+0x70e551b)
#12 0x0000558a145167d3 (anonymous namespace)::OperationLegalizer::legalize(mlir::Operation*, mlir::ConversionPatternRewriter&) DialectConversion.cpp:0:0
#13 0x0000558a14515827 mlir::OperationConverter::convert(mlir::ConversionPatternRewriter&, mlir::Operation*) (/data/szy/MLIR/llvm-release/llvm-project/build/bin/mlir-opt+0x4623827)
#14 0x0000558a145169ff mlir::OperationConverter::convertOperations(llvm::ArrayRef<mlir::Operation*>) (/data/szy/MLIR/llvm-release/llvm-project/build/bin/mlir-opt+0x46249ff)
#15 0x0000558a1451cbbb mlir::applyPartialConversion(mlir::Operation*, mlir::ConversionTarget const&, mlir::FrozenRewritePatternSet const&, mlir::ConversionConfig) (/data/szy/MLIR/llvm-release/llvm-project/build/bin/mlir-opt+0x462abbb)
#16 0x0000558a13d8383c (anonymous namespace)::SCFToOpenMPPass::runOnOperation() SCFToOpenMP.cpp:0:0
#17 0x0000558a144b67a6 mlir::detail::OpToOpPassAdaptor::run(mlir::Pass*, mlir::Operation*, mlir::AnalysisManager, bool, unsigned int) (/data/szy/MLIR/llvm-release/llvm-project/build/bin/mlir-opt+0x45c47a6)
#18 0x0000558a144b70d0 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+0x45c50d0)
#19 0x0000558a144b96a2 mlir::PassManager::run(mlir::Operation*) (/data/szy/MLIR/llvm-release/llvm-project/build/bin/mlir-opt+0x45c76a2)
#20 0x0000558a144b1f4a performActions(llvm::raw_ostream&, std::shared_ptr<llvm::SourceMgr> const&, mlir::MLIRContext*, mlir::MlirOptMainConfig const&) MlirOptMain.cpp:0:0
#21 0x0000558a144b1b9d 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
#22 0x0000558a1455dd75 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+0x466bd75)
#23 0x0000558a144abb85 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+0x45b9b85)
#24 0x0000558a144abe2f mlir::MlirOptMain(int, char**, llvm::StringRef, llvm::StringRef, mlir::DialectRegistry&) (/data/szy/MLIR/llvm-release/llvm-project/build/bin/mlir-opt+0x45b9e2f)
#25 0x0000558a144ac15e mlir::MlirOptMain(int, char**, llvm::StringRef, mlir::DialectRegistry&) (/data/szy/MLIR/llvm-release/llvm-project/build/bin/mlir-opt+0x45ba15e)
#26 0x0000558a1105ab37 main (/data/szy/MLIR/llvm-release/llvm-project/build/bin/mlir-opt+0x1168b37)
#27 0x00007fdd9bdce083 __libc_start_main /build/glibc-LcI20x/glibc-2.31/csu/../csu/libc-start.c:342:3
#28 0x0000558a1105a6ae _start (/data/szy/MLIR/llvm-release/llvm-project/build/bin/mlir-opt+0x11686ae)
``` 
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJzsWl9z4ygS_zTkhYoLof8PedA4cd1UJZVUktlXFwIkc4uRFlAmnk9_BZItWfk7s-vduqubytgCmu7-dTdNg0yMEbXi_ALEX0B8eUY6u2n0xffvuyTIg7OyYbuLWlj4xLURjQJhAQmrshyzNApZHpCKBqRKszys8pSmKWJlGFCc5EECUAFQYXbG8q2bBxL0reyU7WCQLVC0SOD14wNIUE-neasb1lEOvwu7Gei3UujzprUQntNGPXFtzw2tzm1z3rRcbVtIFo7kwASgYugJCwhdR4L6P9eoOkUX7gOCCP3gugE4AziHIP0CkKPHMUUQhJeQaGE3C9ooY4my0HUWUCjGnw-EwWuEwUtCJ8eTbvlW82pBpGwo8ZJjirz4sBgGQbgE4eq5CjEIrzwDQ6tFSzSRkkvYTyK6Dvppl3DKxjb7ph82lrdHHQNKx1FzZ-j94ERnnPdqp5f-W3PbaeXM6Dvm9jSW0N-h1YRyEBavEOzd572JV4xYAvDK_NgBvLq5_noP8ErKp-255pITw_fNVjf_5tQOTYBXQlHZMT52FJePAK8eHq-vnq0mZuHiJUtSJ4dxS4R0-oTFD9G2OxAuZ33rSmhjAV7CR_fxzX0UujaLxQKEV9DLONDyPzoiAc4eIcCJ_1vCb5NnN3FouvnO0PGXR--dkdHDlkj5G6e20SBcDgEKwuI3IjvuZI6MXaQcxm9broli90TVfBTmHB8uP-bebNv-4ZJTSTS_d263olG37V5meAXiS2e2whiu3ZhbdkTKA26QftFO_NqIHy5krAsSvIRHnd1rnUTXBuDcWSW99IbxVoIA46-Wa2I5N5A1UDUWbsgTh14klFzVdgMwBjiFFRGSswVAxd31VfFwBU1XboWFBJZdDTVvG21d5G-sbY0Di1cAr2phN125oM12DJlZZAljOm4AXkGiGBwCDNoNh1QTs4Elob_7yHayH3ygs663JyrQAvp_d7qpNdlCoutuy5U1vxzoZSckc99CAbw6pL03st4bIgznbPhCAK_stl3E5NuTRXc3ZtWnReT0CxFEzwghFMcZCQKUEhRlk2g1O9M_3GmhrAf_6Bc5zkYiTb6vG2M1J9sheIWyvZezv9AEAH9Bz0GQZSjKhvQEcBjMAKRlzF8DcN-pB1ErIv9FFJNcm33GP4mOcRnzUUc8N3LOGDzSBuBssFnfbRa0dRGG_P-eSzhwSSvGcpqWKMIIrteaG9tovtZ2wCJFCfDqOUvWSXQuheqez2vV9QOt3WhO2MI0C9TrGkUYjZpGUxkl4wyhEmoiDIcTzLUUJT2_pl8xej408SIMnAm9_gCvXAZcmZ1hvHWLq1Piue948qqozjU96wUFYREHICyCQY34WA1KsziHpGw8xs-pYVlvBz_LS8ichHSQkMwlpDiHNbfrXuO14bVbxusnl5Y_K1Qo65DLhrCtqSnp5cYod9IHwelrgtdKrt2sNWu2RKg_Jy9PXdSE0SAwOxbIWMWST0QKdTGS-BgJw4olY4zk02gOWZameeAYEtWo3bbpDFRky03r00Q-pI-hcLltr5vvXAtV9_1bYummUOyef9fCurQy7lmGVvPJLreMBHfEWq7VMFf73JNDX4HBh-Xqsbltubq5my0llzOOsl5SMZLFAXxqBJtkDlcdul1w3VdjfrTPGW6r9CSUSOl2h3WljnbbQbGibaWgxO_FH4H127sTB3DxMcrl23qWTePLwxcMesP0RnII3mOyB_unmIwD100tKJH33HTSfo7vEDcAR2vkOzLZqNr594VxX_FvMPNvGgflS5P-3z9_wj-n2DhTxOM4KPtU4_x4tHFGcZCkLPwo1Rw8dc1rIsUPPiCRQ_OTbl36cssddF9PM5eCSE7tSPZKGIYz9eMMp_OS3gnvmdi9pkOld6To--osX-PqIZ3ET1GCwwyno5-iuZ_yqvo80MOwOSorC63J7t6H6hvoThaIUYKjvKpGgPEMIC3LaUIhbSt3d0RbQeToqZ-OtEeia24na21KttLND753-xAED29Sj0yXjapEfTpDkbKcrNhkVhyEWUg_WrGTvfqOmKFe1526VROj-WL9_V09PXJSVCYpSSYmmR79b1vHx0krGGkPO4Du1Cz7GfPCX297slBE7owwN0SR2i3NJXTp3n13yl-usRMejaKYRilJRl9kM3ukiKGftsedaLkUap42HekB5rsZ6JcMdLzBGvNVGav9wbrRr-zAU4Jecj8w6H5HNFf2q6qa_Wo5WWaMaYwYGn2Qz3yQJwTPVN8b49UI_DuyeUzThOCDzhjNdA6qiMCW66rR24K-TNQvz__GsqGG3xDN2bq1-viaquk05Te1BuHVGwnMoVo2yvJn-8LhN1Lo29beEDFkt2l5AiejL5MEDubgynxa9R-XQr9SOx2wd0r80fEX2G_4ttG7L11V9QvgQM94RTpp14xLbvnbc9zpY1bZzT3w8RFlYqTP-vLkeEbthuLqntfCWL17GRzvBcAbJ4e_E8k7nvkgPGcVb8xYGk-Am1YKWyh2pxvKjdnr-o8E3X_hkniXYjr2YLVQtSs-3-o-UTmVlCyNx1R8fIKISFlm8evr4H9tFZ9mpyvzMpuYN5qbl-PqTfMOhQndkL4EKX42ZD6yzckwczweZXA8w0yDmP8lmP8ZcCTY37Q7cMnxTXtMyjCFw5XqCe75k6wMx2Mwnt_tcpSFcL2WoqRrY4m265-53aWm21-j949-0PPx97xhhN3nIDubI08Ih73UU2FPyN7yhze9Z-wiZHmYkzN-EaRhGGY5xuhscxFQxvOMZ2FUZbSKcxyUAUoJC4IsiKM4PBMXGOEowChGOUJBsohyzglFKI0ingU8AhHiWyLkwim5aHR95l_cXQRBlibZmSQll2b_2wV94aGUXW1AhKQw1ozzrLDS_8rBR2x8-da7Nf_6j5uzTsuLX3-rOOj3dIH_EwAA___nr0Si">