Hojun-Cho
bb2f4e1dfe
w6c+wwstage: aggregate let-init copy for ident-array/N_DOT/N_INDEX rhs ( #268 fold-1b) — close addressable-rhs copy family
...
#265 fold-1 landed the deref-rhs aggregate copy as one slot→slot memcpy
loop fed from a source address in SI. fold-1b adds the remaining
addressable-rhs source-address setups, all routed into that SAME loop:
- array IDENT `let c: [N]T = s` — LEAQ the source slot into SI.
Pre-fix both stages truncated to the 8B scalar tail.
- N_DOT field `let c: A = o.i` — cg_dotchain_addr / dotchainaddr
(#253 ) lands &(o.i) in SI. Pre-fix truncated to 8B.
- N_INDEX element `let c: A = a[i]` — the &base[i] spine (#252 :
scaled index + LEAQ base) lands the element address in SI. Pre-fix
scalar-loaded the element address as a value → segfault.
Size (the #254 non-slot-padded ABI extent) comes from the declared let
type for every shape (lu->size / structabisize|tinfo.size), independent
of the rhs; only the per-rhs address setup differs. The deref arm
becomes one branch of the unified arm. Struct-IDENT keeps its own #32
slot-copy arm above (unchanged). With those, the whole addressable-rhs
let-init-copy family is closed by construction: struct-ident / array-
ident / deref / N_DOT / N_INDEX all full-copy, both stages byte-identical
(rule-10).
949 gains 9 full-readback rows (every member written distinct + summed,
so a partial copy fails): array-ident 16B/32B + 12B(MOVL)/11B(MOVW+MOVB)
tails; N_DOT struct-field 16B + array-field 32B + 11B-tail struct field;
N_INDEX struct element 16B/32B. The N_INDEX source array is populated
through a `*inner` to `&a[i]` (the #135/#252 store path) because the
array-of-struct element direct store (`a[i].m[j]=v` / `a[i]=s` / struct-
array literal) segfaults on a SEPARATE pre-existing bug, reported
alongside this fold. w6c+wwdump combined.ww regen (#110 ). 70/70 949,
test-unit 241, sizelint, smoke green.
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