| Issue |
120631
|
| Summary |
Codegen Crash: UNREACHABLE executed at llvm/lib/CodeGen/SelectionDAG/InstrEmitter.cpp:1247!
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
allight
|
If one attempts to codegen this llvm IR (generated from https://github.com/google/xls/issues/1776 optimized with opt -O3 and then reduced using llvm-reduce) the codegenerator will crash (on x86-64)
[sample.reduced.ll](https://github.com/user-attachments/files/18202728/sample.reduced.ll.txt)
[sample.ir.opt.ll](https://github.com/user-attachments/files/18202757/sample.ir.opt.ll.txt)
```
% opt /tmp/sample.ir.ll -o /tmp/sample.ir.opt.ll -O3
% llc /tmp/sample.ir.opt.ll -o /tmp/a.out -O3
t802: ch = <<Deleted Node!>>
This target-independent node should have been selected!
UNREACHABLE executed at third_party/llvm/llvm-project/llvm/lib/CodeGen/SelectionDAG/InstrEmitter.cpp:1247!
PLEASE submit a bug report to http://go/llvm-crash-bug and include the crash backtrace.
Stack dump:
0. Program arguments: /.../blaze-out/k8-fastbuild/bin/third_party/llvm/llvm-project/llvm/llc /tmp/sample.ir.opt.ll -o /tmp/a.out -O3
1. Running pass 'Function Pass Manager' on module '/tmp/sample.ir.opt.ll'.
2. Running pass 'X86 DAG->DAG Instruction Selection' on function '@____sample__main_partition_0'
% llc --version
LLVM (http://llvm.org/):
LLVM version google3-trunk 59890c13343af9e308281b3c76bac425087f4f8a
Optimized build with assertions.
Default target: x86_64-grtev4-linux-gnu
Host CPU: skylake-avx512
Registered Targets:
aarch64 - AArch64 (little endian)
aarch64_32 - AArch64 (little endian ILP32)
aarch64_be - AArch64 (big endian)
amdgcn - AMD GCN GPUs
arm - ARM
arm64 - ARM64 (little endian)
arm64_32 - ARM64 (little endian ILP32)
armeb - ARM (big endian)
bpf - BPF (host endian)
bpfeb - BPF (big endian)
bpfel - BPF (little endian)
hexagon - Hexagon
lanai - Lanai
nvptx - NVIDIA PTX 32-bit
nvptx64 - NVIDIA PTX 64-bit
ppc32 - PowerPC 32
ppc32le - PowerPC 32 LE
ppc64 - PowerPC 64
ppc64le - PowerPC 64 LE
r600 - AMD GPUs HD2XXX-HD6XXX
riscv32 - 32-bit RISC-V
riscv64 - 64-bit RISC-V
thumb - Thumb
thumbeb - Thumb (big endian)
wasm32 - WebAssembly 32-bit
wasm64 - WebAssembly 64-bit
x86 - 32-bit X86: Pentium-Pro and above
x86-64 - 64-bit X86: EM64T and AMD64
```
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