66bdc70bf1
Move examples/*.sx and their expected/ snapshots into per-category subfolders (examples/<category>/...). Folder = leading filename token, with ffi-objc/ffi-jni kept whole; filenames are unchanged. The corpus runner and LSP sweep now discover each category's expected/ dir, while issues/ stays flat. Example 1058's repo-root-relative companion import is made file-relative. Path strings embedded in 164 snapshots were regenerated (path-only changes). Test-layout docs in CLAUDE.md updated.
38 lines
1.2 KiB
Plaintext
38 lines
1.2 KiB
Plaintext
// Regression test for issue-0025 path B.
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//
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// When a fn-pointer's type is spelled with `abi(.c)`, the indirect
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// call must apply the same C-ABI byval coercion that direct C-ABI calls
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// do at the call site (path A): >16-byte non-HFA aggregates are passed
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// as `ptr byval(<T>)`. Without the fix, the indirect call site builds
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// an LLVM function type whose param slot is the raw struct, which the
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// AArch64/x86_64 backend tries to lay out across registers + stack in
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// ways that don't match the byval-attributed callee signature — the
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// callee then reads garbage out of the wrong machine-state slots.
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//
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// The opt-in is the `abi(.c)` on the fn-pointer type spelling.
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// Pure-sx fn-pointer casts (no abi suffix) keep their default
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// calling convention — verified by examples/87-fnptr-cast-large-aggregate.sx.
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#import "modules/std.sx";
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Wide :: struct {
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a: i64;
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b: i64;
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c: i64;
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d: i64;
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}
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accept_c :: (w: Wide) -> i64 abi(.c) {
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w.a + w.b + w.c + w.d
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}
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main :: () -> i32 {
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w := Wide.{ a = 1, b = 10, c = 100, d = 1000 };
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if accept_c(w) != 1111 { return 1; }
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fn_ptr : (Wide) -> i64 abi(.c) = xx accept_c;
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if fn_ptr(w) != 1111 { return 2; }
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0
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}
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