22 lines
889 B
Markdown
22 lines
889 B
Markdown
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# Scope & Assumptions (2025-09-19)
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## Execution Lines in Scope
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- PyVM: semantic reference path used for parity checking
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- LLVM/llvmlite: AOT/EXE harness with PHI synthesis and IR dump capability
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- Excluded for this paper version: Cranelift JIT / Rust MIR Interpreter (Phase‑15 maintenance)
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## MIR14 and PHI Policy
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- MIR14 runs in PHI-off mode (edge-copy merges)
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- PHIs are formed in LLVM at block heads with typed incoming pairs
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- PyVM confirms semantics; LLVM provides performance and distribution artifacts
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## Evaluation Plan (v0)
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- Parity: PyVM vs LLVM on representative tests (truthy rules, short-circuiting, BoxCall)
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- Performance: report LLVM numbers as primary; PyVM for semantics sanity
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- Exclude JIT-related comparisons until stability returns
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## Dev Toggles
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- `NYASH_LLVM_USE_HARNESS=1`, `NYASH_LLVM_TRACE_PHI=1`, `NYASH_LLVM_DUMP_IR=...`
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- `NYASH_MIR_NO_PHI=1` (default)
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