motiejus/zig
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make undefined as a constant value lazy

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closes #268
This commit is contained in:
Andrew Kelley
2017-04-23 13:22:36 -04:00
parent 2ed47070ef
commit 6de33ded81
11 changed files with 139 additions and 93 deletions
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13
src/codegen.cpp
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@@ -3051,7 +3051,8 @@ static LLVMValueRef gen_parent_ptr(CodeGen *g, ConstExprValue *val, ConstParent
}
static LLVMValueRef gen_const_ptr_array_recursive(CodeGen *g, ConstExprValue *array_const_val, size_t index) {
ConstParent *parent = &array_const_val->data.x_array.parent;
expand_undef_array(g, array_const_val);
ConstParent *parent = &array_const_val->data.x_array.s_none.parent;
LLVMValueRef base_ptr = gen_parent_ptr(g, array_const_val, parent);
TypeTableEntry *usize = g->builtin_types.entry_usize;
@@ -3283,9 +3284,13 @@ static LLVMValueRef gen_const_val(CodeGen *g, ConstExprValue *const_val) {
case TypeTableEntryIdArray:
{
uint64_t len = type_entry->data.array.len;
if (const_val->data.x_array.special == ConstArraySpecialUndef) {
return LLVMGetUndef(type_entry->type_ref);
}
LLVMValueRef *values = allocate<LLVMValueRef>(len);
for (uint64_t i = 0; i < len; i += 1) {
ConstExprValue *elem_value = &const_val->data.x_array.elements[i];
ConstExprValue *elem_value = &const_val->data.x_array.s_none.elements[i];
values[i] = gen_const_val(g, elem_value);
}
return LLVMConstArray(LLVMTypeOf(values[0]), values, (unsigned)len);
@@ -4577,11 +4582,11 @@ static void define_builtin_compile_vars(CodeGen *g) {
ConstExprValue *const_val = allocate<ConstExprValue>(1);
const_val->special = ConstValSpecialStatic;
const_val->type = get_array_type(g, str_type, g->link_libs.length);
const_val->data.x_array.elements = allocate<ConstExprValue>(g->link_libs.length);
const_val->data.x_array.s_none.elements = allocate<ConstExprValue>(g->link_libs.length);
for (size_t i = 0; i < g->link_libs.length; i += 1) {
Buf *link_lib_buf = g->link_libs.at(i);
ConstExprValue *array_val = create_const_str_lit(g, link_lib_buf);
init_const_slice(g, &const_val->data.x_array.elements[i], array_val, 0, buf_len(link_lib_buf), true);
init_const_slice(g, &const_val->data.x_array.s_none.elements[i], array_val, 0, buf_len(link_lib_buf), true);
}
add_compile_var(g, "link_libs", const_val);