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.
34 lines
1.1 KiB
Plaintext
34 lines
1.1 KiB
Plaintext
// 16-byte integer-only struct passed by value through `#foreign`.
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//
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// emit_llvm.zig's `abiCoerceParamType` routes 9..16-byte non-HFA
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// structs through `[2 x i64]` for register-pair passing on AAPCS64 /
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// SysV AMD64. The call-site side loads the sx struct as `{ i64, i64 }`,
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// so the verifier needs a memory-bitcast bridge in both directions
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// (`abi.struct2arr` on the way in, `abi.arr2struct` on the way back).
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//
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// Different ABI path from 8-byte register-pair structs (coerce to
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// i64), HFAs at the same total size (Vec4f stays a struct), and
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// >16-byte aggregates (passed via pointer + byval).
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//
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// This file was originally filed as issue-0036 (LLVM verifier
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// failure repro). Promoted to a focused feature example once the
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// emit_llvm.zig coerceArg branches landed.
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#import "modules/std.sx";
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#import c {
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#source "1206-ffi-medium-struct.c";
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};
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Pair64 :: struct { a: i64; b: i64; }
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ffi_pair64_swap :: (p: Pair64) -> Pair64 #foreign;
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main :: () -> i32 {
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p : Pair64 = .{ a = 1, b = 2 };
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q := ffi_pair64_swap(p);
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print("swap = ({}, {})\n", q.a, q.b);
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print("ok = {}\n", q.a == 2 and q.b == 1);
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0
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}
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