d8076b9333
Surface rename of the signed integer family: s1..s64 become i1..i64
(u1..u64, usize, isize unchanged). 'string' keeps the s-prefix arm in
name classification; width parsing moves to the i-prefix arm next to
isize.
Internal TypeId tags follow the surface (.s8/.s16/.s32/.s64 ->
.i8/.i16/.i32/.i64), as do mono-key mangle fragments (ptr_i64,
tu_i64_bool) and all display/diagnostic formatting (i{d}).
Migrated in the same sweep: stdlib + examples + issue repros + FFI C
companions (shared symbol names like ffi_id_i64), expected
stdout/stderr/ir snapshots, specs.md, readme.md, CLAUDE.md/AGENTS.md,
implementation_plan.md, docs/, issue writeups. Vendored stb_image and
historical flow state left untouched.
zig build test: 426/426; examples suite: 595/595.
43 lines
1.8 KiB
Plaintext
43 lines
1.8 KiB
Plaintext
// Storing a struct field whose own type is a pointer to a two-pointer struct
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// (`*Pair` — the shape `coerceArg` would closure-auto-promote into `{ptr,null}`)
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// must store an 8-byte pointer, never a 16-byte struct that overruns the slot
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// and clobbers the neighbouring field. The shared field-lvalue resolver types
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// the GEP as `*field_ty`, so `emitStore` unwraps exactly one pointer level to
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// the field's own type (`*Pair`, an opaque pointer) instead of the pointee
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// aggregate (`Pair`).
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//
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// Regression (issue 0094, attempt-3 consolidation): the shared `fieldLvaluePtr`
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// resolver used to type struct/tuple GEPs with the bare field value type, so a
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// `*Pair` field stored via the multi-assign / address-of paths promoted the
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// pointer to a 16-byte struct and clobbered the next field (`sentinel` read 0).
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// The single-assign path already used the `*field_ty` convention; folding all
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// three lvalue sites onto the one resolver applies it uniformly.
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#import "modules/std.sx";
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Pair :: struct { a: *i64; b: *i64; }
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Holder :: struct { pr: *Pair; sentinel: i64; }
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main :: () {
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x : i64 = 7;
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y : i64 = 9;
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pair : Pair = .{ a = @x, b = @y };
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other : Pair = .{ a = @y, b = @x };
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h : Holder = .{ pr = @pair, sentinel = 99 };
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// single-assign: store a *Pair into h.pr; sentinel must stay 99.
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h.pr = @other;
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print("single: a={} b={} sentinel={}\n", h.pr.a.*, h.pr.b.*, h.sentinel);
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// multi-assign: store into h.pr alongside a plain local; sentinel untouched.
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dummy : i64 = 0;
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h.pr, dummy = @pair, 1;
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print("multi: a={} b={} sentinel={}\n", h.pr.a.*, h.pr.b.*, h.sentinel);
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// address-of the *Pair field, store through it; sentinel untouched.
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ppr := @h.pr;
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ppr.* = @other;
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print("addr: a={} b={} sentinel={}\n", h.pr.a.*, h.pr.b.*, h.sentinel);
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}
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