| Issue |
179680
|
| Summary |
[mlir-opt] Parser/Verifier crash in linalg.batch_reduce_matmul with !amx.tile types
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
Subway2023
|
The crash is a Parser/Verifier failure.
- Linalg named operations (like batch_reduce_matmul) rely on an automated regionBuilder to define their scalar arithmetic.
- The regionBuilder is designed for standard ShapedType (tensors/memrefs) with numeric element types.
- When the parser encounters !amx.tile, it fails to emit a clean diagnostic error. Instead, the logic proceeds to buildBinaryFn, which cannot handle non-numeric types and hits a hard llvm_unreachable.
```mlir
module {
func.func @main() {
%0 = "tosa.const"() <{values = dense<0> : tensor<1xi32>}> : () -> tensor<1xi32>
%1 = amx.tile_zero : !amx.tile<16x16xi32>
%2 = linalg.batch_reduce_matmul ins(%0, %0 : tensor<1xi32>, tensor<1xi32>) outs(%1 : !amx.tile<16x16xi32>) -> !amx.tile<16x16xi32>
return
}
}
```
```
mlir-opt temp.mlir
```
```
<unknown>:0: warning: could not cast operand of type 'i32' to '!amx.tile<16x16xi32>'
<unknown>:0: warning: could not cast operand of type 'i32' to '!amx.tile<16x16xi32>'
unsupported non numeric type
UNREACHABLE executed at llvm-project-llvmorg-22.1.0-rc1/mlir/lib/Dialect/Linalg/IR/LinalgOps.cpp:514!
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace and instructions to reproduce the bug.
Stack dump:
0. Program arguments: llvmorg-22.1.0-install/bin/mlir-opt temp.mlir
1. MLIR Parser: custom op parser 'builtin.module'
2. MLIR Parser: custom op parser 'func.func'
3. MLIR Parser: custom op parser 'linalg.batch_reduce_matmul'
#0 0x000060a617e30e32 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (llvmorg-22.1.0-install/bin/mlir-opt+0x252fe32)
#1 0x000060a617e2d5af llvm::sys::RunSignalHandlers() (llvmorg-22.1.0-install/bin/mlir-opt+0x252c5af)
#2 0x000060a617e2d6fc SignalHandler(int, siginfo_t*, void*) Signals.cpp:0:0
#3 0x00007ac23ac45330 (/lib/x86_64-linux-gnu/libc.so.6+0x45330)
#4 0x00007ac23ac9eb2c __pthread_kill_implementation ./nptl/pthread_kill.c:44:76
#5 0x00007ac23ac9eb2c __pthread_kill_internal ./nptl/pthread_kill.c:78:10
#6 0x00007ac23ac9eb2c pthread_kill ./nptl/pthread_kill.c:89:10
#7 0x00007ac23ac4527e raise ./signal/../sysdeps/posix/raise.c:27:6
#8 0x00007ac23ac288ff abort ./stdlib/abort.c:81:7
#9 0x000060a617e1012e (llvmorg-22.1.0-install/bin/mlir-opt+0x250f12e)
#10 0x000060a61ddd3e74 (anonymous namespace)::RegionBuilderHelper::buildBinaryFn(mlir::linalg::BinaryFn, mlir::Value, mlir::Value, llvm::function_ref<mlir::InFlightDiagnostic ()>) LinalgOps.cpp:0:0
```
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