WebAssembly / WebAssembly/binaryen
I64ToI32Lowering fails on i64.trunc_sat_f64_s
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Description
Testcase: run bin/wasm-opt --flatten --i64-to-i32-lowering --all-features on
(module
(func $trunc_sat_f64_s (result i64)
(drop
(block $label$1 (result i32)
(drop
(block $label$2 (result i32)
(drop
(i64.trunc_sat_f64_s
(f64.const -nan:0xfffff9a702f19)
)
)
(i32.const 1)
)
)
(i32.const 0)
)
)
(unreachable)
)
)
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First steps
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Research direction
Reproduce the failure with the provided module using bin/wasm-opt --flatten --i64-to-i32-lowering --all-features. Start by tracing the i64-to-i32 lowering pass's handling of i64.trunc_sat_f64_s and its nested blocks. Done means the command handles this testcase without failing and preserves valid output.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- wasm
- Domain
- compilers
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100