Hojun-Cho
cc22abfc04
let x: []T = g.buf on a module-global struct dispatched only str fields to the 3-word header load; a []T field fell to the scalar tail (ptr word only), so len/cap read stale registers and the shape was byteid-divergent against cstage's TY_STR||TY_SLICE arm (#263).
26 lines
626 B
Plaintext
26 lines
626 B
Plaintext
//ww:run
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// A module-global struct's slice field read BY VALUE must load the
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// full 24B {ptr,len,cap} header. The pre-fix wwstage global-dot arm
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// dispatched only str fields to the header load; a []T field fell to
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// the scalar tail (ptr word only) and len(x) read stale registers.
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package main;
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type box = struct {
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buf: []i32,
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name: str,
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};
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let g: box = box{};
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export fn main() int = {
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let arr: [4]i32 = [10, 20, 30, 40];
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g.buf = arr[:];
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g.name = "globals";
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let x: []i32 = g.buf;
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if (len(x) != 4) { return 1; };
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if (x[2] != 30) { return 2; };
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let s: str = g.name;
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if (len(s) != 7) { return 3; };
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return 0;
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};
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