| Issue |
180716
|
| Summary |
mlir-opt crash: materializeTargetConversion assertion in XeGPU to XeVM conversion
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
xvv4402
|
**Bug Op**: scf.while (with vector block arguments)
**Bug Pass**: --convert-xegpu-to-xevm
**Detailed Description**: The mlir-opt tool crashes during the XeGPU to XeVM conversion process. The assertion failure occurs in DialectConversion.cpp when the TypeConverter fails to correctly materialize a target type for an scf.while loop's carry values. Specifically, when the loop uses vector<1x1xi1>, the conversion callback produces a result that does not match the expected type range, violating the internal consistency of the conversion framework.
```mlir
module {
func.func @main() {
%0 = vector.constant_mask [1, 1] : vector<2x2xi1>
%1 = pdl.type : vector<2x2xi1>
%2 = vector.extract_strided_slice %0 {offsets = [0, 0], sizes = [1, 1], strides = [1, 1]} : vector<2x2xi1> to vector<1x1xi1>
%3 = scf.while (%arg0 = %2) : (vector<1x1xi1>) -> vector<1x1xi1> {
%4 = arith.constant true
scf.condition(%4) %arg0 : vector<1x1xi1>
} do {
^bb0(%arg0: vector<1x1xi1>):
scf.yield %arg0 : vector<1x1xi1>
}
return
}
}
```
```
mlir-opt --convert-xegpu-to-xevm temp.mlir
```
```
mlir-opt: llvm-project-llvmorg-22.1.0-rc1/mlir/lib/Transforms/Utils/DialectConversion.cpp:3756: llvm::SmallVector<mlir::Value> mlir::TypeConverter::materializeTargetConversion(mlir::OpBuilder&, mlir::Location, mlir::TypeRange, mlir::ValueRange, mlir::Type) const: Assertion `TypeRange(ValueRange(result)) == resultTypes && "callback produced incorrect number of values or values with " "incorrect types"' failed.
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 --convert-xegpu-to-xevm temp.mlir
#0 0x000055a18371ce32 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (llvmorg-22.1.0-install/bin/mlir-opt+0x252fe32)
#1 0x000055a1837195af llvm::sys::RunSignalHandlers() (llvmorg-22.1.0-install/bin/mlir-opt+0x252c5af)
#2 0x000055a1837196fc SignalHandler(int, siginfo_t*, void*) Signals.cpp:0:0
#3 0x00007efde8445330 (/lib/x86_64-linux-gnu/libc.so.6+0x45330)
#4 0x00007efde849eb2c __pthread_kill_implementation ./nptl/pthread_kill.c:44:76
#5 0x00007efde849eb2c __pthread_kill_internal ./nptl/pthread_kill.c:78:10
#6 0x00007efde849eb2c pthread_kill ./nptl/pthread_kill.c:89:10
#7 0x00007efde844527e raise ./signal/../sysdeps/posix/raise.c:27:6
#8 0x00007efde84288ff abort ./stdlib/abort.c:81:7
#9 0x00007efde842881b _nl_load_domain ./intl/loadmsgcat.c:1177:9
#10 0x00007efde843b517 (/lib/x86_64-linux-gnu/libc.so.6+0x3b517)
#11 0x000055a18aee1769 mlir::TypeConverter::materializeTargetConversion(mlir::OpBuilder&, mlir::Location, mlir::TypeRange, mlir::ValueRange, mlir::Type) const (llvmorg-22.1.0-install/bin/mlir-opt+0x9cf4769)
#12 0x000055a18af00afb mlir::OperationConverter::applyConversion(llvm::ArrayRef<mlir::Operation*>) (llvmorg-22.1.0-install/bin/mlir-opt+0x9d13afb)
#13 0x000055a18af012ab applyConversion(llvm::ArrayRef<mlir::Operation*>, mlir::ConversionTarget const&, mlir::FrozenRewritePatternSet const&, mlir::ConversionConfig, (anonymous namespace)::OpConversionMode) DialectConversion.cpp:0:0
#14 0x000055a18af0144f mlir::applyPartialConversion(mlir::Operation*, mlir::ConversionTarget const&, mlir::FrozenRewritePatternSet const&, mlir::ConversionConfig) (llvmorg-22.1.0-install/bin/mlir-opt+0x9d1444f)
#15 0x000055a18728711d (anonymous namespace)::ConvertXeGPUToXeVMPass::runOnOperation() XeGPUToXeVM.cpp:0:0
#16 0x000055a18afbc756 mlir::detail::OpToOpPassAdaptor::run(mlir::Pass*, mlir::Operation*, mlir::AnalysisManager, bool, unsigned int) (llvmorg-22.1.0-install/bin/mlir-opt+0x9dcf756)
#17 0x000055a18afbca8e mlir::detail::OpToOpPassAdaptor::runPipeline(mlir::OpPassManager&, mlir::Operation*, mlir::AnalysisManager, bool, unsigned int, mlir::PassInstrumentor*, mlir::PassInstrumentation::PipelineParentInfo const*) (llvmorg-22.1.0-install/bin/mlir-opt+0x9dcfa8e)
#18 0x000055a18afbd1e2 mlir::PassManager::runPasses(mlir::Operation*, mlir::AnalysisManager) (llvmorg-22.1.0-install/bin/mlir-opt+0x9dd01e2)
#19 0x000055a18afbe400 mlir::PassManager::run(mlir::Operation*) (llvmorg-22.1.0-install/bin/mlir-opt+0x9dd1400)
#20 0x000055a1837e3767 performActions(llvm::raw_ostream&, std::shared_ptr<llvm::SourceMgr> const&, mlir::MLIRContext*, mlir::MlirOptMainConfig const&) MlirOptMain.cpp:0:0
#21 0x000055a1837e44ea llvm::LogicalResult llvm::function_ref<llvm::LogicalResult (std::unique_ptr<llvm::MemoryBuffer, std::default_delete<llvm::MemoryBuffer>>, llvm::MemoryBufferRef const&, 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::MemoryBufferRef, llvm::raw_ostream&)>(long, std::unique_ptr<llvm::MemoryBuffer, std::default_delete<llvm::MemoryBuffer>>, llvm::MemoryBufferRef const&, llvm::raw_ostream&) MlirOptMain.cpp:0:0
#22 0x000055a18b38c731 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::MemoryBufferRef const&, llvm::raw_ostream&)>, llvm::raw_ostream&, llvm::StringRef, llvm::StringRef) (llvmorg-22.1.0-install/bin/mlir-opt+0xa19f731)
#23 0x000055a1837db8d0 mlir::MlirOptMain(llvm::raw_ostream&, std::unique_ptr<llvm::MemoryBuffer, std::default_delete<llvm::MemoryBuffer>>, mlir::DialectRegistry&, mlir::MlirOptMainConfig const&) (.part.0) MlirOptMain.cpp:0:0
#24 0x000055a1837e4b70 mlir::MlirOptMain(int, char**, llvm::StringRef, llvm::StringRef, mlir::DialectRegistry&) (llvmorg-22.1.0-install/bin/mlir-opt+0x25f7b70)
#25 0x000055a1837e4da9 mlir::MlirOptMain(int, char**, llvm::StringRef, mlir::DialectRegistry&) (llvmorg-22.1.0-install/bin/mlir-opt+0x25f7da9)
#26 0x000055a183616023 main (llvmorg-22.1.0-install/bin/mlir-opt+0x2429023)
#27 0x00007efde842a1ca __libc_start_call_main ./csu/../sysdeps/nptl/libc_start_call_main.h:74:3
#28 0x00007efde842a28b call_init ./csu/../csu/libc-start.c:128:20
#29 0x00007efde842a28b __libc_start_main ./csu/../csu/libc-start.c:347:5
#30 0x000055a1836fb405 _start (llvmorg-22.1.0-install/bin/mlir-opt+0x250e405)
Aborted (core dumped)
```
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