Inline monomorphic methods in optimized Lua

[Frotty]

Summary

• lower monomorphic method calls inside Lua hot loops to ordinary IM function calls before inlining
• reuse the backend's existing direct-call predicate in vararg lowering and final emission
• preserve callback, local-player, recursion, register-pressure, and genuine virtual-dispatch boundaries
• keep calls outside loops in their established representation to avoid broad code-shape churn

Acceptance criteria

• tiny monomorphic methods disappear from optimized Lua hot loops
• receivers are evaluated exactly once
• callback/function-reference and local-player-sensitive methods keep their call boundaries
• abstract/overridden and virtually dispatched vararg methods retain dispatch
• the existing UnitSpatialIndex loop still emits raw table accesses without assurance, vararg-pack, or arithmetic-helper overhead

Checks

• PASS: focused 10-test LuaBackendAuditTests matrix covering the new behavior, Jass/Lua receiver parity, callback and local-player barriers, fixed and dynamic varargs, virtual dispatch, and UnitSpatialIndex emitted shape
• PASS: complete LuaTranslationTests class (114 tests)
• PASS: GitHub Actions full Gradle build and test suite
• PASS: git diff --check

Review

• Codex review completed cleanly on head 4da675e9dc with no inline findings or unresolved threads.

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-09-04T16:47:28.470555Z	4da675e	Manual request

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[Frotty]

CI exposed broad optimized-output shape churn outside hot loops. I restricted the lowering to monomorphic calls structurally inside IM loops; the full LuaTranslationTests class (114 tests) and the focused Lua backend matrix now pass locally. @codex review

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. More of your lovely PRs please.

Reviewed commit: 4da675e9dc

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