| Issue |
179081
|
| Summary |
[mlir-opt] --affine-expand-index-ops-as-affine crashes on affine.linearize_index with ub.poison
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
compilerStudyer
|
The --affine-expand-index-ops-as-affine pass crashes when affine.linearize_index uses a ub.poison operand. The crash is triggered during the transformation of "live" operations (those with users) due to an invalid cast in the affine folding logic.
```mlir
module {
func.func @main() {
%0 = gpu.block_id x
%1 = ub.poison : index
%2 = affine.linearize_index [%0, %1] by (1) : index
%3 = emitc.cast %2 : index to i32
return
}
}
```
```
mlir-opt --affine-expand-index-ops-as-affine
```
```
mlir-opt: llvm-project-llvmorg-22.1.0-rc1/llvm/include/llvm/Support/Casting.h:566: decltype(auto) llvm::cast(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 --affine-expand-index-ops-as-affine test.mlir
#0 0x00005671f20e6e32 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (llvmorg-22.1.0-install/bin/mlir-opt+0x252fe32)
#1 0x00005671f20e35af llvm::sys::RunSignalHandlers() (llvmorg-22.1.0-install/bin/mlir-opt+0x252c5af)
#2 0x00005671f20e36fc SignalHandler(int, siginfo_t*, void*) Signals.cpp:0:0
#3 0x00007f4160045330 (/lib/x86_64-linux-gnu/libc.so.6+0x45330)
#4 0x00007f416009eb2c __pthread_kill_implementation ./nptl/pthread_kill.c:44:76
#5 0x00007f416009eb2c __pthread_kill_internal ./nptl/pthread_kill.c:78:10
#6 0x00007f416009eb2c pthread_kill ./nptl/pthread_kill.c:89:10
#7 0x00007f416004527e raise ./signal/../sysdeps/posix/raise.c:27:6
#8 0x00007f41600288ff abort ./stdlib/abort.c:81:7
#9 0x00007f416002881b _nl_load_domain ./intl/loadmsgcat.c:1177:9
#10 0x00007f416003b517 (/lib/x86_64-linux-gnu/libc.so.6+0x3b517)
```
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