| Issue |
171908
|
| Summary |
[WebAssembly] SplitVecOp_VSETCC simplification (PR #139295) breaks WebAssembly half-precision vector fcmp
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
aneshlya
|
PR #139295 introduced a regression when compiling vector `fcmp` operations with half-precision floats for WebAssembly.
```
Operand not processed?
t38: v4f32 = uint_to_fp t73
UNREACHABLE executed at llvm/lib/CodeGen/SelectionDAG/LegalizeTypes.cpp:489!
```
Compiler explorer link: https://ispc.godbolt.org/z/GbnGohx9o
The change in `SplitVecOp_VSETCC` now preserves the original result element type instead of forcing i1.
**Affected Targets:**
- WebAssembly (wasm32/wasm64) with SIMD and half-precision vectors
Discovered via ISPC compiler's wasm target
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