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Add #no_capture args: ..T to reuse the backing array stack memory

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This commit is contained in:
gingerBill
2024-07-14 11:39:05 +01:00
parent f98a7b84df
commit edc793d7c1
12 changed files with 136 additions and 57 deletions
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src/llvm_backend_proc.cpp
+26 -1
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@@ -517,6 +517,7 @@ gb_internal void lb_begin_procedure_body(lbProcedure *p) {
lb_start_block(p, p->entry_block);
map_init(&p->direct_parameters);
p->no_captures.allocator = heap_allocator();
GB_ASSERT(p->type != nullptr);
@@ -3450,8 +3451,32 @@ gb_internal lbValue lb_build_call_expr_internal(lbProcedure *p, Ast *expr) {
}
isize slice_len = var_args.count;
if (slice_len > 0) {
lbAddr base_array = {};
if (e->flags & EntityFlag_NoCapture) {
for (lbNoCaptureData const &nc : p->no_captures) {
if (are_types_identical(nc.slice_type, slice_type)) {
base_array = nc.base_array;
break;
}
}
DeclInfo *d = decl_info_of_entity(p->entity);
if (d != nullptr && base_array.addr.value == nullptr) {
for (NoCaptureData const &nc : d->no_captures) {
if (are_types_identical(nc.slice_type, slice_type)) {
base_array = lb_add_local_generated(p, alloc_type_array(elem_type, nc.max_count), true);
array_add(&p->no_captures, lbNoCaptureData{slice_type, base_array});
break;
}
}
}
}
if (base_array.addr.value == nullptr) {
base_array = lb_add_local_generated(p, alloc_type_array(elem_type, slice_len), true);
}
GB_ASSERT(base_array.addr.value != nullptr);
lbAddr slice = lb_add_local_generated(p, slice_type, true);
lbAddr base_array = lb_add_local_generated(p, alloc_type_array(elem_type, slice_len), true);
for (isize i = 0; i < var_args.count; i++) {
lbValue addr = lb_emit_array_epi(p, base_array.addr, cast(i32)i);