Hojun-Cho
94928470bc
The chained value-struct walker's N_CALL arm handled only <=24B register returns; an sret-class rhs fell to the scalar tail and stored ONE word (the sret dest pointer) into the leaf -- silent truncation in BOTH stages, byteid-blind. Point the callee's hidden RDI at the BP-relative leaf slot (the single-dot #234 arm verbatim); a ptr-root/global chain joins the #234-tail loud-stop family.
30 lines
714 B
Plaintext
30 lines
714 B
Plaintext
//ww:run-exit 0
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// #234 chained-leaf arm: `o.a.b = f()` with a >24B sret-class return
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// routes the callee's hidden RDI at the leaf slot. Pre-fix both stages
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// fell to the scalar tail and stored ONE word (the sret dest pointer).
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package main;
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type big = struct { x: i64, y: i64, z: i64, w: i64 };
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type mid = struct { pad: i64, b: big };
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type outer = struct { a: mid };
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fn f() big = {
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let r: big;
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r.x = 11;
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r.y = 22;
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r.z = 33;
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r.w = 44;
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return r;
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};
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export fn main() i32 = {
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let o: outer;
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o.a.pad = 7;
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o.a.b = f();
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if (o.a.pad != 7) { return 1; };
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if (o.a.b.x != 11) { return 2; };
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if (o.a.b.y != 22) { return 3; };
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if (o.a.b.z != 33) { return 4; };
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if (o.a.b.w != 44) { return 5; };
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return 0;
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};
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