| Issue |
179266
|
| Summary |
[mlir-opt] Crash in arith-int-range-narrowing when handling arith.trunci to i0 (APInt assertion failure)
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
mlirBug
|
The --arith-int-range-narrowing pass crashes when encountering an **arith.trunci** operation that truncates a value to an i0 (zero-bit integer). The crash is triggered by an assertion failure in LLVM's APInt::ashrInPlace, which is called during the integer range inference process.
```mlir
module {
func.func @main() {
%0 = ml_program.token
%1 = spirv.GroupNonUniformElect <Workgroup> : i1
%2 = scf.if %1 -> (i1) {
scf.yield %1 : i1
} else {
scf.yield %1 : i1
}
%3 = arith.trunci %2 : i1 to i0
return
}
}
```
```
mlir-opt --arith-int-range-narrowing
```
```
mlir-opt: llvm-project-llvmorg-22.1.0-rc1/llvm/include/llvm/ADT/APInt.h:836: void llvm::APInt::ashrInPlace(unsigned int): Assertion `ShiftAmt <= BitWidth && "Invalid shift amount"' 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 --arith-int-range-narrowing test.mlir
#0 0x000058d831ce9e32 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (llvmorg-22.1.0-install/bin/mlir-opt+0x252fe32)
#1 0x000058d831ce65af llvm::sys::RunSignalHandlers() (llvmorg-22.1.0-install/bin/mlir-opt+0x252c5af)
#2 0x000058d831ce66fc SignalHandler(int, siginfo_t*, void*) Signals.cpp:0:0
#3 0x0000761d44e45330 (/lib/x86_64-linux-gnu/libc.so.6+0x45330)
#4 0x0000761d44e9eb2c __pthread_kill_implementation ./nptl/pthread_kill.c:44:76
#5 0x0000761d44e9eb2c __pthread_kill_internal ./nptl/pthread_kill.c:78:10
#6 0x0000761d44e9eb2c pthread_kill ./nptl/pthread_kill.c:89:10
#7 0x0000761d44e4527e raise ./signal/../sysdeps/posix/raise.c:27:6
#8 0x0000761d44e288ff abort ./stdlib/abort.c:81:7
#9 0x0000761d44e2881b _nl_load_domain ./intl/loadmsgcat.c:1177:9
#10 0x0000761d44e3b517 (/lib/x86_64-linux-gnu/libc.so.6+0x3b517)
```
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