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Try to improve const union LLVM construction

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This commit is contained in:
gingerBill
2025-09-24 09:55:22 +01:00
parent 90d1229ead
commit 31f0aaa62f
4 changed files with 173 additions and 18 deletions
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15
src/llvm_backend_expr.cpp
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@@ -2495,6 +2495,11 @@ gb_internal lbValue lb_emit_conv(lbProcedure *p, lbValue value, Type *t) {
Type *vt = dst->Union.variants[0];
if (internal_check_is_assignable_to(src_type, vt)) {
value = lb_emit_conv(p, value, vt);
if (lb_is_const(value)) {
LLVMValueRef res = lb_construct_const_union(m, value.value, vt, t);
return {res, t};
}
lbAddr parent = lb_add_local_generated(p, t, true);
lb_emit_store_union_variant(p, parent.addr, value, vt);
return lb_addr_load(p, parent);
@@ -2503,11 +2508,18 @@ gb_internal lbValue lb_emit_conv(lbProcedure *p, lbValue value, Type *t) {
for (Type *vt : dst->Union.variants) {
if (src_type == t_llvm_bool && is_type_boolean(vt)) {
value = lb_emit_conv(p, value, vt);
if (lb_try_construct_const_union(m, &value, vt, t)) {
return value;
}
lbAddr parent = lb_add_local_generated(p, t, true);
lb_emit_store_union_variant(p, parent.addr, value, vt);
return lb_addr_load(p, parent);
}
if (are_types_identical(src_type, vt)) {
if (lb_try_construct_const_union(m, &value, vt, t)) {
return value;
}
lbAddr parent = lb_add_local_generated(p, t, true);
lb_emit_store_union_variant(p, parent.addr, value, vt);
return lb_addr_load(p, parent);
@@ -2545,6 +2557,9 @@ gb_internal lbValue lb_emit_conv(lbProcedure *p, lbValue value, Type *t) {
if (valid_count == 1) {
Type *vt = dst->Union.variants[first_success_index];
value = lb_emit_conv(p, value, vt);
if (lb_try_construct_const_union(m, &value, vt, t)) {
return value;
}
lbAddr parent = lb_add_local_generated(p, t, true);
lb_emit_store_union_variant(p, parent.addr, value, vt);
return lb_addr_load(p, parent);