<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/64674>64674</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [mlir] --inline crashed with assertion failure "expected 'source' to have no successors"
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

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

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

<pre>
    git version: 0fb3066873fdfbe28dbb6409c58a8bff7cf208c6

system: Ubuntu 20.04.6 LTS (Focal Fossa)

reproduced with: `mlir-opt --inline a.mlir`

a.mlir:
```
func.func private @func1() {
  %idx0 = index.constant 1
  %alloc_20 = memref.alloc(%idx0, %idx0) : memref<?x?xi32>
  scf.index_switch %idx0 -> f32 
  default {
 %cst_11 = arith.constant 1.71053568E+9 : f32
    memref.alloca_scope {
      %alloc_21 = memref.alloc(%idx0, %idx0) : memref<?x?xi32>
 memref.copy %alloc_20, %alloc_21 : memref<?x?xi32> to memref<?x?xi32>
 func.call @__mlir_math_fpowi_f16_i32() : () -> ()
    }
    scf.yield %cst_11 : f32
  }
  return
}

func.func @func2() {
 memref.alloca_scope {
    %idx0 = index.constant 1
    func.call @func1() : () -> ()
    scf.index_switch %idx0 -> memref<?x25xi64> 
 default {
      %alloc_18 = memref.alloc(%idx0) : memref<?x25xi64>
 scf.yield %alloc_18 : memref<?x25xi64>
    }
  }
 return
}

func.func private @__mlir_math_fpowi_f16_i32() attributes {llvm.linkage = #llvm.linkage<linkonce_odr>} {
  %cst = arith.constant 1.000000e+00 : f16
  %c0_i32 = arith.constant 1 : i32
  cf.br ^bb3(%cst, %cst, %c0_i32 : f16, f16, i32)
^bb3(%6: f16, %7: f16, %8: i32):
  cf.br ^bb5(%6 : f16)
^bb5(%12: f16):
  %13 = arith.shrui %8, %c0_i32 : i32
  cf.br ^bb3(%12, %12, %c0_i32 : f16, f16, i32)
}
```

trace:
```
mlir-opt: /data/bin/llvm-project/mlir/lib/IR/PatternMatch.cpp:351: virtual void mlir::RewriterBase::inlineBlockBefore(mlir::Block*, mlir::Block*, mlir::Block::iterator, mlir::ValueRange): Assertion `source->hasNoSuccessors() && "expected 'source' to have no successors"' 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/bin/llvm-project/build/bin/mlir-opt --inline a.mlir
 #0 0x0000557b42ca3def llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/data/bin/llvm-project/build/bin/mlir-opt+0x14b0def)
 #1 0x0000557b42ca1074 SignalHandler(int) Signals.cpp:0:0
 #2 0x00007f06b8f86420 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x14420)
 #3 0x00007f06b8a7100b raise (/lib/x86_64-linux-gnu/libc.so.6+0x4300b)
 #4 0x00007f06b8a50859 abort (/lib/x86_64-linux-gnu/libc.so.6+0x22859)
 #5 0x00007f06b8a50729 (/lib/x86_64-linux-gnu/libc.so.6+0x22729)
 #6 0x00007f06b8a61fd6 (/lib/x86_64-linux-gnu/libc.so.6+0x33fd6)
 #7 0x0000557b457ab093 mlir::RewriterBase::inlineBlockBefore(mlir::Block*, mlir::Block*, llvm::ilist_iterator<llvm::ilist_detail::node_options<mlir::Operation, true, false, void>, false, false>, mlir::ValueRange) (/data/bin/llvm-project/build/bin/mlir-opt+0x3fb8093)
 #8 0x0000557b43dd9663 AllocaScopeInliner::matchAndRewrite(mlir::memref::AllocaScopeOp, mlir::PatternRewriter&) const (/data/bin/llvm-project/build/bin/mlir-opt+0x25e6663)
 #9 0x0000557b481f3598 mlir::PatternApplicator::matchAndRewrite(mlir::Operation*, mlir::PatternRewriter&, llvm::function_ref<bool (mlir::Pattern const&)>, llvm::function_ref<void (mlir::Pattern const&)>, llvm::function_ref<mlir::LogicalResult (mlir::Pattern const&)>) (/data/bin/llvm-project/build/bin/mlir-opt+0x6a00598)
#10 0x0000557b45646657 (anonymous namespace)::GreedyPatternRewriteDriver::processWorklist() GreedyPatternRewriteDriver.cpp:0:0
#11 0x0000557b4564a89b mlir::applyPatternsAndFoldGreedily(mlir::Region&, mlir::FrozenRewritePatternSet const&, mlir::GreedyRewriteConfig, bool*) (/data/bin/llvm-project/build/bin/mlir-opt+0x3e5789b)
#12 0x0000557b455b8d8a (anonymous namespace)::Canonicalizer::runOnOperation() Canonicalizer.cpp:0:0
#13 0x0000557b45599d6e mlir::detail::OpToOpPassAdaptor::run(mlir::Pass*, mlir::Operation*, mlir::AnalysisManager, bool, unsigned int) (/data/bin/llvm-project/build/bin/mlir-opt+0x3da6d6e)
#14 0x0000557b4559a24a mlir::detail::OpToOpPassAdaptor::runPipeline(mlir::OpPassManager&, mlir::Operation*, mlir::AnalysisManager, bool, unsigned int, mlir::PassInstrumentor*, mlir::PassInstrumentation::PipelineParentInfo const*) (/data/bin/llvm-project/build/bin/mlir-opt+0x3da724a)
#15 0x0000557b4559b3db mlir::LogicalResult llvm::function_ref<mlir::LogicalResult (mlir::OpPassManager&, mlir::Operation*)>::callback_fn<mlir::detail::OpToOpPassAdaptor::run(mlir::Pass*, mlir::Operation*, mlir::AnalysisManager, bool, unsigned int)::'lambda'(mlir::OpPassManager&, mlir::Operation*)>(long, mlir::OpPassManager&, mlir::Operation*) Pass.cpp:0:0
#16 0x0000557b455c8863 (anonymous namespace)::InlinerPass::optimizeCallable(mlir::CallGraphNode*, llvm::StringMap<mlir::OpPassManager, llvm::MallocAllocator>&) Inliner.cpp:0:0
#17 0x0000557b455d13b5 mlir::LogicalResult llvm::function_ref<mlir::LogicalResult ((anonymous namespace)::CallGraphSCC&)>::callback_fn<(anonymous namespace)::InlinerPass::runOnOperation()::'lambda'((anonymous namespace)::CallGraphSCC&)>(long, (anonymous namespace)::CallGraphSCC&) Inliner.cpp:0:0
#18 0x0000557b455d26c3 (anonymous namespace)::InlinerPass::runOnOperation() Inliner.cpp:0:0
#19 0x0000557b45599d6e mlir::detail::OpToOpPassAdaptor::run(mlir::Pass*, mlir::Operation*, mlir::AnalysisManager, bool, unsigned int) (/data/bin/llvm-project/build/bin/mlir-opt+0x3da6d6e)
#20 0x0000557b4559a24a mlir::detail::OpToOpPassAdaptor::runPipeline(mlir::OpPassManager&, mlir::Operation*, mlir::AnalysisManager, bool, unsigned int, mlir::PassInstrumentor*, mlir::PassInstrumentation::PipelineParentInfo const*) (/data/bin/llvm-project/build/bin/mlir-opt+0x3da724a)
#21 0x0000557b4559aa51 mlir::PassManager::run(mlir::Operation*) (/data/bin/llvm-project/build/bin/mlir-opt+0x3da7a51)
#22 0x0000557b4558aefb performActions(llvm::raw_ostream&, std::shared_ptr<llvm::SourceMgr> const&, mlir::MLIRContext*, mlir::MlirOptMainConfig const&) MlirOptMain.cpp:0:0
#23 0x0000557b4558c3b4 processBuffer(llvm::raw_ostream&, std::unique_ptr<llvm::MemoryBuffer, std::default_delete<llvm::MemoryBuffer>>, mlir::MlirOptMainConfig const&, mlir::DialectRegistry&, llvm::ThreadPool*) MlirOptMain.cpp:0:0
#24 0x0000557b4558c564 mlir::LogicalResult llvm::function_ref<mlir::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&)::'lambda'(std::unique_ptr<llvm::MemoryBuffer, std::default_delete<llvm::MemoryBuffer>>, llvm::raw_ostream&)>(long, std::unique_ptr<llvm::MemoryBuffer, std::default_delete<llvm::MemoryBuffer>>, llvm::raw_ostream&) MlirOptMain.cpp:0:0
#25 0x0000557b45680154 mlir::splitAndProcessBuffer(std::unique_ptr<llvm::MemoryBuffer, std::default_delete<llvm::MemoryBuffer>>, llvm::function_ref<mlir::LogicalResult (std::unique_ptr<llvm::MemoryBuffer, std::default_delete<llvm::MemoryBuffer>>, llvm::raw_ostream&)>, llvm::raw_ostream&, bool, bool) (/data/bin/llvm-project/build/bin/mlir-opt+0x3e8d154)
#26 0x0000557b45585987 mlir::MlirOptMain(llvm::raw_ostream&, std::unique_ptr<llvm::MemoryBuffer, std::default_delete<llvm::MemoryBuffer>>, mlir::DialectRegistry&, mlir::MlirOptMainConfig const&) (/data/bin/llvm-project/build/bin/mlir-opt+0x3d92987)
#27 0x0000557b4558c88b mlir::MlirOptMain(int, char**, llvm::StringRef, mlir::DialectRegistry&) (/data/bin/llvm-project/build/bin/mlir-opt+0x3d9988b)
#28 0x0000557b42bde0e3 main (/data/bin/llvm-project/build/bin/mlir-opt+0x13eb0e3)
#29 0x00007f06b8a52083 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x24083)
#30 0x0000557b42c7561e _start (/data/bin/llvm-project/build/bin/mlir-opt+0x148261e)
Aborted (core dumped)
```
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJzsWl1z4yrS_jXKDRUXAglJF7lwnPi8UzU5k0rm3b1UIYFsdmTQAsok59dvgWRbOE6cTGbPzn6kEkeG5qG_6G5A1BixkpxfROlllF6d0d6ulb6gUsmnjerNzeL-rFLs6WIlLHjg2gglIzwHsKkwJCTPcMOaiqOcVRVJYFGnOc2rpsnqBsG8JhG8iuB8-DRPxvKNG_3_VS9tDxCcwWRGwOev9yBC-VLVtAVLZQyNUDEdqXmnFetrzsB3YdcOIiJw0wp9rjoLzs-FbIXkgM5cW0TgdPDYiMevrnf49V-bXtYz9wE6LR6o5SBKoPseRyiPUAGi7HKgBCBCqWCPEET4CgjJ-OOsVtJYKi2IJzS0bVVdooFuwzeaNzPf5hE9RIQWYPdYACfQQBjhRYSXj-5PYBTh6y2uqZuZn7M034Wt1ztmziN8DRqMwJaS8Yb2rZ0wHqG0NraMY88R1cKuJ5zPshimOCX5dYQuB14ajLZoIJCAlqZWHZ8qxf3shY5_ptAjTK26p6leR5zJjC8CAatOzOHtX9O2dXYvS-cq5Ybaddl06rsom5iUjn70Bed4w6NX-_C810SUXe2_OIs9Cd6yQP-Bcif0mttey9FFt82HLjq6Jnrmmidt9BbXBaEygkVwQvDXvTOwAEofBUk8yDD8ub-GPhXnr_rUEUfaTTHiBZaYgJ4YFhp0__gmU02iySmvotZqUfWWG6eDtn3YzFohv9EV94JHCE_bIrxwT0rWvFRMO3azq4MoVRt7fKlD_8MjdAnh4IwxmY6Djq2jQz212Ltu3cwqDaL0uqrwYI7a2HFlTp62gMNMaLH956XfxvgJCJmQRijNwq_5lglU7OJ5wEo6ouxnnM4x9sZo0ruHcT14IrtZ614Msz4T5lVFxGgcsHt4mxp2rhRmqOHTalrzl5LYNhMOy3TJqKURWlZCRmjpfOe80-pvvLYRWvpciJatqCK0_HQXoeUttZZreUNtvZ7VXRfhOU5jB_UgtO1pCx6UYGCbRPH8jn_XwnJ9SQ0fWob0e9mq-tslb5TmEcr39L49QnMn8NtaB1DLNbVKhwR_oW3P76hc8cF6YG4M11Yo6UoCo3pdcxd01tT8ru77uubGKG22cQyRCBEQIcQfO15b7kJCNoyKUObSxZo-cCAVMJOxyPU1VLSczQaN336-nt9fA9NXG2EBBVW_App3SluPYW1nHL9oGaHlSth1X81qtRnN8dwqwpiemwgtAZUMCFm3PePArjmoNTVrUNH6m_eAcfp7S-tvgPWbbucScDbEzVutVppuANWrfsOlNW9wiqoXLdt1vlhXbasJDAF8dIEkTbMqQTXFjDfAS-ZtZJ7M8HCrhbSe16_efVG-J9L0e6mM1ZxuvFUWQEg72Cj_IXZdUHuMkwoy3uyTU4RwfMBtDLME3IuVpO3_UclariOUj5MPzWZcB9D_7YDQCJQ1kFR5k5MEQVCWmhurNC-1HXkfFtdjTkqSnLdC9o_nK9kPHZ1da07ZzKgZHDlOXEkz4RcH09AshrACmgrD34BfO2TikRMMYRUgJyFyCvO0ALRSb-J8goxQnhYBcnqInO0s-WbMDIWYJMQkccPI-zAxbhgJMLOpL6QZrWCB_6mhbe_wohXGlruohheHXYxbKtqhRSrGS9W5uGYivNhjf-nceLcLQwtgdc99NqGt8Q8uUruKYNo2PAyNL8TRj6053FQ5LHCg53yqZ8xYQQgGc1-e3rvq9JNX68jLxqWeuWSj9gMNbys09zwZ_6ULxRmT2NZ-PqIUwJcvHxMOpZwQEgpXTIXL4wanRf6cl3nXtaIebH1KyolV56cFm3qVKzbdwHKoYyulWhBAjwCDLga9jM7wIojP9x8F2Q_-rFaipu0dN77MfwvuBz2SUAjTYr9FcUkgyFkpSQhJMzfL7qgDSLrhpvN5qhjY-01zzp5CE1xp8bB13E4rVyP8VelvbgWPRcbLo56nFcdZfMAZzYtq4gG069otmplLtlQt81OI9ilQ5h1feQ8ioQcttfqDb_kYce65neh8Sj0wP1IvlGzEyhE4v_K--dFYwdMsL6rAMiiQP61yltNTllm4TudV4o-tMXQvv8jJQvK2COiOqx-H0xcFI3yikGlU_tJ9VV-6W2rMnNFut7J1Lw-82phnC_nlJT6XtH0ywtxQSVdc79W9AL30x3Psp9RGmFHCCA90nxwIT1FC3y38rei4C-cHIc2R7mQiP10bYZQ05pM0VvuS1-0ZnoXRKcEw89Ax8n5LNZf2k2zUdmH8BGdnNEMJDRSeHii8wmy62MNY-bHg-h4L-LDr22vatm67UTYymOhXWgcDfYSylm4qRiOUfUxwlLdKrg7J3gECHO3x8EJCg9d5TvCp6DZWR15_vsFVghvxB1_QtqVVG6401_ibpt36d8X4s7Lz3mohVze0OygjA-mmA278CdlQa3nTXo_V1MjVcTHDwjplMa7Sn-rXJxPCqIT7xWJfSBzx6Peq_lhaOep_P8Tg3vPePfx1e-QH9kCkfr_bHU2pr05b_BcnUwT_l0z_1GSK4kOF0zQ-4HMr-VHfOoziH2aQpnHA4EFpm1PeVKDjulF6M6-H3f3rh2LGsvFQbU01Z2Vnw6ODe392ebNycfqFkv7m86e7hZKWP9pnprxphf7S2Rsq5FDsT7diYNJ7dLmjg9o5r3GVgHFXdNk3jT9ae5N4vRR_7_kz8W74RumnLdSEfrw1KhlvueUvj3FJ4PrtMk_prgRteW3dtspY_fRs6_3Vn-Td7ndGJ9WVHKorJclPTZJ_njpfNurpUnKip1_QPY6b_Y1L5mhl8MtYZV9t_BIsnV4w4W6J5DBOpwvGdK2wc8luDyLOv0K6f8NF-irFvlIY_n_44CdncZoE2fFga5SnRZ4dX2j_aWHio5VGgYo8C3SZHaaWPK9e1OVY8tVrOhR3R7eMd7w5LfHHJSnyPDgORMHOBVWMQ47Bhgr5wZtBzCvIcTBVcXBrhWCOQVm2oqpLY6m25WTet95jJTAPZjm8Lc1SEnMw4H_0sjNHJN7vQeaV0sOVdl4rzf39MGd7XrYvDZyxC8wKXNAzfhGTAkFIcpKdrS9IgzFHJGsqWqW8KVie5xAjWlQZqWNYnYkLBBGGeZzAIk1QNmOwyGqG07huEpgRHCWQb6hoZ_6VFaVXZ_5q-4IkJEvOWlrx1vh3DRGS_DvwnRFCUXp1pi-85FW_MlECW2Gs2aNYYVv_kqJ3x_RqfzftL8jHFwMB3b0M0FDR9pq__6r_rNftxY9f4HtB_xEAAP__iApyTQ">