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Add ir_emit_store_union_variant to reduce alloca use

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gingerBill
2018-01-28 15:09:07 +00:00
parent dce45e7d58
commit e919482aa8
1 changed files with 18 additions and 12 deletions
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30
src/ir.cpp
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@@ -2993,6 +2993,20 @@ irValue *ir_emit_uintptr_to_ptr(irProcedure *proc, irValue *value, Type *t) {
return ir_emit(proc, ir_instr_conv(proc, irConv_inttoptr, value, vt, t));
}
void ir_emit_store_union_variant(irProcedure *proc, irValue *parent, irValue *variant, Type *variant_type) {
gbAllocator a = proc->module->allocator;
irValue *underlying = ir_emit_conv(proc, parent, make_type_pointer(a, variant_type));
irValue *v = variant;
ir_emit_store(proc, underlying, variant);
Type *t = type_deref(ir_type(parent));
irValue *tag_ptr = ir_emit_union_tag_ptr(proc, parent);
ir_emit_store(proc, tag_ptr, ir_const_union_tag(a, t, variant_type));
}
irValue *ir_emit_conv(irProcedure *proc, irValue *value, Type *t) {
Type *src_type = ir_type(value);
if (are_types_identical(t, src_type)) {
@@ -3178,12 +3192,7 @@ irValue *ir_emit_conv(irProcedure *proc, irValue *value, Type *t) {
ir_emit_comment(proc, str_lit("union - child to parent"));
gbAllocator a = proc->module->allocator;
irValue *parent = ir_add_local_generated(proc, t);
irValue *underlying = ir_emit_conv(proc, parent, make_type_pointer(a, vt));
ir_emit_store(proc, underlying, value);
irValue *tag_ptr = ir_emit_union_tag_ptr(proc, parent);
ir_emit_store(proc, tag_ptr, ir_const_union_tag(a, t, src_type));
ir_emit_store_union_variant(proc, parent, value, vt);
return ir_emit_load(proc, parent);
}
}
@@ -8038,8 +8047,8 @@ void ir_setup_type_info_data(irProcedure *proc) { // NOTE(bill): Setup type_info
ExactValue value = fields[i]->Constant.value;
irValue *v = ir_value_constant(a, t->Enum.base_type, value);
ir_emit_store(proc, value_ep, ir_emit_conv(proc, v, t_type_info_enum_value));
ir_emit_store(proc, name_ep, ir_const_string(a, fields[i]->token.string));
ir_emit_store_union_variant(proc, value_ep, v, ir_type(v));
ir_emit_store(proc, name_ep, ir_const_string(a, fields[i]->token.string));
}
irValue *v_count = ir_const_int(a, count);
@@ -8208,10 +8217,7 @@ void ir_setup_type_info_data(irProcedure *proc) { // NOTE(bill): Setup type_info
if (tag != nullptr) {
Type *tag_type = type_deref(ir_type(tag));
GB_ASSERT(is_type_named(tag_type));
Type *variant_type = type_deref(ir_type(variant_ptr));
irValue *tag = ir_const_union_tag(a, variant_type, tag_type);
irValue *ptr = ir_emit_union_tag_ptr(proc, variant_ptr);
ir_emit_store(proc, ptr, tag);
ir_emit_store_union_variant(proc, variant_ptr, ir_emit_load(proc, tag), tag_type);
} else {
if (t != t_llvm_bool) {
GB_PANIC("Unhandled Type_Info variant: %s", type_to_string(t));