lab/sx

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agra c88f4fbcef test(asm): Phase 0.0 — corpus target-gating + .build JSON config

Adds per-example build/run directives to the corpus runner via an optional
`expected/<name>.build` JSON sidecar (`BuildConfig { aot, target }`), replacing
the standalone `.aot` marker. Threads `--target` into the run/build/ir spawns
and gates the execute path on host arch+os match; a cross-target example fails
loudly ("ir-only mode not yet implemented") pending Phase 0.1.

- corpus_run.test.zig: BuildConfig + std.json parse (unknown-key => error),
  hostMatchesTarget (shorthand-expand + arch/os token match, arm64->aarch64),
  withTarget argv helper; unit tests for both.
- migrate 1226/1227 `.aot` markers -> `.build` { "aot": true }.
- lock fixture 1638-platform-target-host (`.build` { "target": "macos" }).

Test-infra only; no compiler code. zig build test green (646 corpus, 444 unit).

2026-06-15 17:37:35 +03:00

2.8 KiB

Raw Blame History

sx Inline Assembly — Checkpoint (ASM stream)

Companion to current/PLAN-ASM.md; design in docs/inline-asm-design.md. Update after every commit, one step at a time per the cadence rule (no commit may both add a test and make it pass).

Last completed step

0.0 — corpus runner target-gating + <name>.build JSON config. Added BuildConfig (std.json.parseFromSliceLeaky → struct { aot, target }, unknown-key ⇒ error.UnknownField) replacing the standalone .aot marker; migrated the 2 existing .aot markers (1226/1227) to { "aot": true }; threaded --target into the run/build/ir spawns via withTarget; added hostMatchesTarget (shorthand-expand + arch/os token match, arm64→aarch64) gating the execute path. Cross-target mismatch fails loudly (placeholder until 0.1's ir-only branch) — verified the bail fires (target=linux, host=aarch64-macos). Locked with examples/1638-platform-target-host.sx (.build { "target": "macos" }, runs natively + asserts stdout) + unit tests for the JSON parse and hostMatchesTarget. zig build test green (646 corpus, 0 failed; 444 unit, 0 failed). Files: src/corpus_run.test.zig, examples/1638-*, examples/expected/{1226,1227,1638}-*.

Current state

Phase 0 step 0.0 landed (test-infra only — no compiler code touched). The corpus runner now reads expected/<name>.build and threads/gates --target; an arch-pinned example whose target matches the host executes, a mismatch currently bails loudly ("cross-target ir-only mode not yet implemented"). Phase A–E feasibility already confirmed against the live tree (LLVMGetInlineAsm / LLVMBuildCall2 / LLVMAppendModuleInlineAsm in LLVM@19 Core.h; ERR-stream extractvalue→tuple machinery in emit_llvm.zig:726-927; lib-less extern, 60 sites; --target a global CLI flag).

Next step

0.1 — implement the mismatch ⇒ ir-only branch in sweepRoot (replace the loud placeholder bail): when cfg.target doesn't match the host, skip run/build/exec and assert only .exit+.ir+.stderr from sx ir --target; require an .ir snapshot (loud failure if absent). Lock with examples/16xx-platform-target-cross.sx (asm-free () -> i64 { return 0; }), .build { "target": "x86_64-linux" }, + a checked-in .ir snapshot. Then 0.2 (CLAUDE.md §Testing/§Test-layout docs for .build), then Phase A (kw_asm). See PLAN-ASM.md Phase 0.

Log

(init) Plan + design doc written; ASM stream opened.
(0.0) Corpus runner target-gating: <name>.build JSON config (replaces .aot marker), --target threading, hostMatchesTarget execute-gate, loud cross-target placeholder bail. Migrated 1226/1227 .aot→.build; locked with 1638 fixture + unit tests. zig build test green.

Known issues

None yet.

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