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ARM64: Fix pass-by-value struct calling conventions.

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Reported by AnthonyK213. #1357
This commit is contained in:
Mike Pall 2025-04-10 22:06:47 +02:00
parent e0a7ea8a92
commit c262976486
1 changed files with 13 additions and 5 deletions
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18
src/lj_ccall.c
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@ -781,17 +781,24 @@ static unsigned int ccall_classify_struct(CTState *cts, CType *ct)
{
CTSize sz = ct->size;
unsigned int r = 0, n = 0, isu = (ct->info & CTF_UNION);
while (ct->sib) {
while (ct->sib && n <= 4) {
unsigned int m = 1;
CType *sct;
ct = ctype_get(cts, ct->sib);
if (ctype_isfield(ct->info)) {
sct = ctype_rawchild(cts, ct);
if (ctype_isarray(sct->info)) {
CType *cct = ctype_rawchild(cts, sct);
if (!cct->size) continue;
m = sct->size / cct->size;
sct = cct;
}
if (ctype_isfp(sct->info)) {
r |= sct->size;
if (!isu) n++; else if (n == 0) n = 1;
if (!isu) n += m; else if (n < m) n = m;
} else if (ctype_iscomplex(sct->info)) {
r |= (sct->size >> 1);
if (!isu) n += 2; else if (n < 2) n = 2;
if (!isu) n += 2*m; else if (n < 2*m) n = 2*m;
} else if (ctype_isstruct(sct->info)) {
goto substruct;
} else {
@ -803,10 +810,11 @@ static unsigned int ccall_classify_struct(CTState *cts, CType *ct)
sct = ctype_rawchild(cts, ct);
substruct:
if (sct->size > 0) {
unsigned int s = ccall_classify_struct(cts, sct);
unsigned int s = ccall_classify_struct(cts, sct), sn;
if (s <= 1) goto noth;
r |= (s & 255);
if (!isu) n += (s >> 8); else if (n < (s >>8)) n = (s >> 8);
sn = (s >> 8) * m;
if (!isu) n += sn; else if (n < sn) n = sn;
}
}
}