diff options
Diffstat (limited to 'qbe.c')
| -rw-r--r-- | qbe.c | 12 |
1 files changed, 10 insertions, 2 deletions
@@ -259,6 +259,7 @@ funcalloc(struct func *f, struct decl *d) { enum instkind op; struct inst *inst; + unsigned long long size; assert(!d->type->incomplete); assert(d->type->size > 0); @@ -266,17 +267,24 @@ funcalloc(struct func *f, struct decl *d) d->align = d->type->align; else if (d->align < d->type->align) error(&tok.loc, "object requires alignment %d, which is stricter than %d", d->type->align, d->align); + size = d->type->size; switch (d->align) { case 1: case 2: case 4: op = IALLOC4; break; case 8: op = IALLOC8; break; + default: size += d->align - 16; /* fallthrough */ case 16: op = IALLOC16; break; - default: - fatal("internal error: invalid alignment: %d\n", d->align); } inst = mkinst(f, op, ptrclass, mkintconst(size), NULL); arrayaddptr(&f->start->insts, inst); + if (d->align > 16) { + /* TODO: implement alloc32 in QBE and use that instead */ + inst = mkinst(f, IADD, ptrclass, &inst->res, mkintconst(d->align - 16)); + arrayaddptr(&f->start->insts, inst); + inst = mkinst(f, IAND, ptrclass, &inst->res, mkintconst(-d->align)); + arrayaddptr(&f->start->insts, inst); + } d->value = &inst->res; } |