659cdc2276
Adds Pass 4b 'lowerObjcDefinedClassMethods' to lowerRoot: after
scan, walk objc_defined_class_cache and force-lower each bodied
instance method. The Obj-C runtime invokes these via the IMP
pointers wired up in A.4 — no sx-side call path drives lazy
lowering, so we trigger it here. Mirrors the JNI eager-lower
pattern in Pass 5.
Bug fix: lazyLowerFunction has its OWN inline body-lowering
path (separate from lowerFunction) that re-resolves param types
at line 1025. It was running without current_foreign_class set,
so '*Self' fell through to the type_bridge fallback and got
interned as a 0-field struct named 'Self' — body's
'self.counter' GEP'd into '{}' and LLVM verification rejected.
Fix: set current_foreign_class at the top of lazyLowerFunction
via the same lookupObjcDefinedClassForMethod path lowerFunction
uses. Save+restore via defer.
A.3 ('self.field access via the ivar') falls out for free —
'*Self' resolves to '*__SxFooState' so 'self.counter' is a
plain struct field access. IR snapshot in
142-objc-class-method-lowering.ir shows the round-trip:
define internal void @SxFoo.bump(ptr, ptr self) {
%gep = getelementptr inbounds { i32 }, ptr %self, 0, 0
%v = load i32, ptr %gep
store i32 (%v + 1), ptr %gep
ret void
}
171 examples pass (+1 from 142); zig build test green.
Still gated: Obj-C runtime dispatch (A.7) — sx-side
'f.bump()' calls bail at lower.zig:4407 with the existing
diagnostic. IMP-trampoline emission (the C-ABI shim that bridges
'objc_msgSend' → this body) lands in A.4 alongside class-pair
init.
43 lines
1.3 KiB
Plaintext
43 lines
1.3 KiB
Plaintext
// M1.2 A.2c / A.3 — instance-method body lowering on sx-defined
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// `#objc_class`.
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//
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// The Obj-C runtime invokes class methods via the IMP pointers
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// wired up in M1.2 A.4. No sx-side call path drives lazy lowering,
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// so the eager pass `lowerObjcDefinedClassMethods` walks the
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// `objc_defined_class_cache` and force-lowers every bodied method
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// after Pass 1 finishes.
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//
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// `*Self` substitution (A.2b) routes the param's pointee type to
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// the hidden state-struct `__<ClassName>State`. `self.counter`
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// then resolves as a plain struct field access — A.3's "free if
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// types align". The IR snapshot pins the round-trip:
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//
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// define internal void @SxFoo.bump(ptr __sx_ctx, ptr self) {
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// %gep = getelementptr inbounds { i32 }, ptr %self, 0, 0
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// %v = load i32, ptr %gep
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// %inc = add i32 %v, 1
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// store i32 %inc, ptr %gep
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// ret void
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// }
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//
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// IMP-trampoline emission (the C-ABI shim that the Obj-C runtime
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// calls and that reads the `__sx_state` ivar) lands separately
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// in M1.2 A.4 alongside class-pair init. Runtime dispatch
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// (M1.2 A.7) stays gated until then.
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#import "modules/std.sx";
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#import "modules/compiler.sx";
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SxFoo :: #objc_class("SxFoo") {
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counter: s32;
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bump :: (self: *Self) {
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self.counter += 1;
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}
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}
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main :: () -> s32 {
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print("compiled\n");
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0;
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}
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