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wcc+w6c_ww: >48B tagged args from place-resolved sources (#38b cont.)

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Task #40 (FB3): the #38b MEMORY-class staging only accepted ident /
aggarg_srcaddr-enumerated sources, loud-stopping on a slice-element
arg — the regex run_thread loop-condition shape
is_consuming_inst(re.insts[threads[i].pc]) (regex.ha:602) and B4's
(*p)[i] spelling. The staging now falls back to cgplaceaddr (the F6
resolver) for the slot's source address; the existing word-push
machinery is unchanged. Placed AFTER aggarg_srcaddr so every
pre-#40 shape keeps its asm byte-exact (verified vs a master w6c).

Boundaries kept loud (rule 7): exact-type rvalue (no place to
resolve), sret-class call source (#40-family follow-up), global
tagged let (task #25), variadic element, register-overflow mixing.
Diagnostic re-worded to match: slice-element is wired, rvalue and
unresolvable-place sources are not.

test/929 grows 6 run rows (element source with literal+computed
index, deref-spine, nested re.insts[threads[i].pc] spelling,
element mixed with register args both orders, fn-call index with
two mem args per call — the inner CALL runs inside the mem
pre-pass with the other slot already staged — and global-slice
element, the storage-backed twin of the loud fail_global_src
boundary — all build-fail loud at master) and 1 reject row pinning
the new boundary text on both stages.
This commit is contained in:
Hojun-Cho
2026-06-04 12:13:34 +09:00
parent f3f74c9b21
commit 403625e433
5 changed files with 220 additions and 6 deletions
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17
cmd/w6c/cgen.c
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@@ -7391,8 +7391,23 @@ cgexpr(Cg *c, Node *n, Local *locals)
memslots += msz / 8;
continue;
}
/* #40/FB3: a place the enumerated arms miss —
* slice element, deref-spine element — resolves
* through the F6 resolver. AFTER aggarg_srcaddr
* so every pre-#40 shape keeps its asm; the
* resolver balances its own pushes, so the words
* already staged below stay put. */
if (cgplaceaddr(c, args[i], D_SI, locals)) {
for (int k = msz/8 - 1; k >= 0; k--) {
ins2(c, A_MOVQ, amem(D_SI, k*8),
areg(D_AX));
ins1(c, A_PUSHQ, areg(D_AX));
}
memslots += msz / 8;
continue;
}
fatal("#38b: >48B tagged arg from unsupported source "
"kind %d (slice-element and rvalue sources "
"kind %d (rvalue and unresolvable-place sources "
"unwired)", args[i]->kind);
}
/* eval right-to-left, push to stack. Each N_IDENT fast-path