| Issue |
180106
|
| Summary |
mlir-opt crash: affine.linearize_index folder fails on ub.poison due to invalid IntegerAttr cast
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
xvv4402
|
**MLIR Version**: 22.1.0
**Bug Op**: affine.linearize_index
**Bug Pass**: --canonicalize
**Detailed Description**: The mlir-opt tool crashes during the folding of affine.linearize_index when an operand is ub.poison. The folder attempts to llvm::cast<IntegerAttr> a PoisonAttr, triggering an assertion failure. Removing the smt.solver block prevents the crash because DCE deletes the unused operation before folding occurs.
```mlir
module {
func.func @main() {
%0 = index.constant 0
%1 = ub.poison : index
%2 = affine.linearize_index [%0, %1] by (1) : index
smt.solver(%2) : (index) -> () {
^bb0(%arg0: index):
smt.yield
}
return
}
}
```
```
mlir-opt --canonicalize temp.mlir
```
```
mlir-opt: llvm-project-llvmorg-22.1.0-rc1/llvm/include/llvm/Support/Casting.h:560: decltype(auto) llvm::cast(const From&) [with To = mlir::IntegerAttr; From = mlir::Attribute]: Assertion `isa<To>(Val) && "cast<Ty>() argument of incompatible type!"' 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 --canonicalize temp.mlir
#0 0x00006092cdc68e32 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (llvmorg-22.1.0-install/bin/mlir-opt+0x252fe32)
#1 0x00006092cdc655af llvm::sys::RunSignalHandlers() (llvmorg-22.1.0-install/bin/mlir-opt+0x252c5af)
#2 0x00006092cdc656fc SignalHandler(int, siginfo_t*, void*) Signals.cpp:0:0
#3 0x000070c32ea45330 (/lib/x86_64-linux-gnu/libc.so.6+0x45330)
#4 0x000070c32ea9eb2c __pthread_kill_implementation ./nptl/pthread_kill.c:44:76
#5 0x000070c32ea9eb2c __pthread_kill_internal ./nptl/pthread_kill.c:78:10
#6 0x000070c32ea9eb2c pthread_kill ./nptl/pthread_kill.c:89:10
#7 0x000070c32ea4527e raise ./signal/../sysdeps/posix/raise.c:27:6
#8 0x000070c32ea288ff abort ./stdlib/abort.c:81:7
#9 0x000070c32ea2881b _nl_load_domain ./intl/loadmsgcat.c:1177:9
#10 0x000070c32ea3b517 (/lib/x86_64-linux-gnu/libc.so.6+0x3b517)
#11 0x00006092d50d98f2 (llvmorg-22.1.0-install/bin/mlir-opt+0x99a08f2)
#12 0x00006092d5115819 mlir::affine::AffineLinearizeIndexOp::fold(mlir::affine::AffineLinearizeIndexOpGenericAdaptor<llvm::ArrayRef<mlir::Attribute>>) (llvmorg-22.1.0-install/bin/mlir-opt+0x99dc819)
#13 0x00006092d514093f llvm::LogicalResult llvm::detail::UniqueFunctionBase<llvm::LogicalResult, mlir::Operation*, llvm::ArrayRef<mlir::Attribute>, llvm::SmallVectorImpl<mlir::OpFoldResult>&>::CallImpl<mlir::Op<mlir::affine::AffineLinearizeIndexOp, mlir::OpTrait::ZeroRegions, mlir::OpTrait::OneResult, mlir::OpTrait::OneTypedResult<mlir::IndexType>::Impl, mlir::OpTrait::ZeroSuccessors, mlir::OpTrait::VariadicOperands, mlir::OpTrait::AttrSizedOperandSegments, mlir::OpTrait::OpInvariants, mlir::BytecodeOpInterface::Trait, mlir::ConditionallySpeculatable::Trait, mlir::OpTrait::AlwaysSpeculatableImplTrait, mlir::MemoryEffectOpInterface::Trait, mlir::InferTypeOpInterface::Trait>::getFoldHookFn()::'lambda'(mlir::Operation*, llvm::ArrayRef<mlir::Attribute>, llvm::SmallVectorImpl<mlir::OpFoldResult>&) const>(void*, mlir::Operation*, llvm::ArrayRef<mlir::Attribute>, llvm::SmallVectorImpl<mlir::OpFoldResult>&) (llvmorg-22.1.0-install/bin/mlir-opt+0x9a0793f)
```
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