26a04e49d0
run_examples.sh now supports an optional `tests/expected/<name>.ir` sibling to `.txt`/`.exit`. When present, the runner also captures `sx ir <file>` output, normalizes target-/host-specific noise (module ID, target triple/datalayout, attribute groups, LLVM's auto-suffixed %temp numbering), and diffs against the snapshot. `--update` regenerates it alongside the runtime output. Catches lowering changes that don't affect what the program prints — exactly the shape Phase 1.5's selector interning will produce (same runtime output, very different IR). First snapshot: `ffi-objc-call-03-selector-sharing.ir`. Today the test emits four `call ptr @sel_registerName(ptr @str.N)` lines for its four call sites; after 1.5 we expect two static `@OBJC_SELECTOR_REFERENCES_<sel>` globals + loads at each call site. The diff between the two snapshots will be the visible artifact of the optimization.
43 lines
1.6 KiB
Plaintext
43 lines
1.6 KiB
Plaintext
// Phase 1 step 1.4 (PLAN-FFI.md): multiple `#objc_call` sites
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// with the same selector. Today (after 1.3) each site emits its
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// own `call @sel_registerName(<"init">)`; the actual SEL handle
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// is recomputed per call.
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//
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// 1.5 lands selector interning: one static `SEL` global per
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// unique selector string (named `OBJC_SELECTOR_REFERENCES_init`,
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// matching clang's convention) populated once via the runtime
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// at module init. Per call site becomes a single load.
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//
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// Runtime behavior is unchanged before vs. after 1.5; the
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// improvement is visible in `sx ir` only. The IR snapshot at
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// `tests/expected/ffi-objc-call-03-selector-sharing.ir` locks
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// in today's shape (4 `call ptr @sel_registerName` instructions,
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// one per call site). After 1.5 lands selector interning, the
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// snapshot updates to ≤2 (one per unique selector string) plus
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// a static `@OBJC_SELECTOR_REFERENCES_<sel>` global and loads at
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// the call sites.
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#import "modules/std.sx";
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#import "modules/compiler.sx";
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main :: () -> s32 {
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inline if OS == .macos {
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// Three calls, same selector, same nil receiver. Today these
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// emit three `sel_registerName("init")` calls. After 1.5 the
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// emit collapses to one (cached SEL global).
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#objc_call(void)(null, "init");
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#objc_call(void)(null, "init");
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#objc_call(void)(null, "init");
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// A different selector — should remain distinct after 1.5
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// (one cached SEL per unique string, not per call site).
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#objc_call(void)(null, "release");
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print("ok\n");
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}
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inline if OS != .macos {
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print("skipped (not macos)\n");
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}
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0;
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}
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