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ffi 1.4: regression test for shared-selector #objc_call sites

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101/101 regression tests pass (+ffi-objc-call-03-selector-sharing).

Test exercises four call sites — three sharing "init" and one
"release" — to pin the multi-site / multi-selector lowering before
1.5 changes how SEL lookups are cached.

Runtime behavior: identical before and after 1.5 (all call sites
hit nil receivers; libobjc returns 0 for void). The improvement is
visible only in the emitted IR — today:

  $ ./zig-out/bin/sx ir examples/ffi-objc-call-03-selector-sharing.sx \\
      | grep -c "call ptr @sel_registerName"
  4

After 1.5 (planned): 2 — one `sel_registerName` per unique selector
string, materialized into a static `OBJC_SELECTOR_REFERENCES_<sel>`
global at module init, then loaded at each call site. Matches the
shape clang produces for `@selector(...)`. Worth re-running the
above grep after 1.5 lands as a manual sanity check.

The IR-shape snapshot harness (auto-diff of `sx ir` output) is
deferred; for now we verify by eye.
This commit is contained in:
agra
2026-05-19 12:59:13 +03:00
parent f43dea6913
commit c54ca755fa
3 changed files with 43 additions and 0 deletions
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tests/expected/ffi-objc-call-03-selector-sharing.exit Normal file
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tests/expected/ffi-objc-call-03-selector-sharing.txt Normal file
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ok