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rework compile-time known pointer values

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See #257
This commit is contained in:
Andrew Kelley 2017-02-11 13:13:45 -05:00
parent 12049aa43b
commit 39287d7346
6 changed files with 633 additions and 302 deletions
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77
src/all_types.hpp
View File

@ -67,6 +67,27 @@ enum OutType {
OutTypeObj,
};
enum ConstParentId {
ConstParentIdNone,
ConstParentIdStruct,
ConstParentIdArray,
};
struct ConstParent {
ConstParentId id;
union {
struct {
ConstExprValue *array_val;
size_t elem_index;
} p_array;
struct {
ConstExprValue *struct_val;
size_t field_index;
} p_struct;
} data;
};
struct ConstEnumValue {
uint64_t tag;
ConstExprValue *payload;
@ -74,43 +95,55 @@ struct ConstEnumValue {
struct ConstStructValue {
ConstExprValue *fields;
ConstParent parent;
};
struct ConstArrayValue {
ConstExprValue *elements;
// This will be the same as `len` from the type, but we duplicate the information
// in the constant value so that pointers pointing to arrays can see this size.
// TODO now that ConstExprValue has the type field we can use that instead of this.
size_t size;
// If the data for this array is supposed to be contained in a different constant
// value, we link to the parent here. This way getting a pointer to this constant
// value can return a pointer into the parent data structure.
ConstExprValue *parent_array;
size_t parent_array_index;
ConstParent parent;
};
enum ConstPtrSpecial {
ConstPtrSpecialNone,
// This helps us preserve the null byte when performing compile-time
// concatenation on C strings.
ConstPtrSpecialCStr,
// This means that the pointer points to inline memory, so attempting
// to write a non-compile-time known value is an error
ConstPtrSpecialInline,
// Enforce explicitly setting this ID by making the zero value invalid.
ConstPtrSpecialInvalid,
// The pointer is a reference to a single object.
ConstPtrSpecialRef,
// The pointer points to an element in an underlying array.
ConstPtrSpecialBaseArray,
// The pointer points to a field in an underlying struct.
ConstPtrSpecialBaseStruct,
// This means that we did a compile-time pointer reinterpret and we cannot
// understand the value of pointee at compile time. However, we will still
// emit a binary with a compile time known address.
// In this case index is the numeric address value.
ConstPtrSpecialRuntime,
ConstPtrSpecialHardCodedAddr,
};
struct ConstPtrValue {
ConstExprValue *base_ptr;
// If index is SIZE_MAX, then base_ptr points directly to child type.
// Otherwise base_ptr points to an array const val and index is offset
// in object units from base_ptr into the block of memory pointed to
size_t index;
ConstPtrSpecial special;
// This means that the pointer points to memory used by a comptime variable,
// so attempting to write a non-compile-time known value is an error
bool comptime_var_mem;
union {
struct {
ConstExprValue *pointee;
} ref;
struct {
ConstExprValue *array_val;
size_t elem_index;
// This helps us preserve the null byte when performing compile-time
// concatenation on C strings.
bool is_cstr;
} base_array;
struct {
ConstExprValue *struct_val;
size_t field_index;
} base_struct;
struct {
uint64_t addr;
} hard_coded_addr;
} data;
};
struct ConstErrValue {

142
src/analyze.cpp
View File

@ -2832,7 +2832,33 @@ static uint32_t hash_const_val(ConstExprValue *const_val) {
return const_val->data.x_arg_tuple.start_index * 281907309 +
const_val->data.x_arg_tuple.end_index * 2290442768;
case TypeTableEntryIdPointer:
return hash_ptr(const_val->data.x_ptr.base_ptr) + hash_size(const_val->data.x_ptr.index);
{
uint32_t hash_val = const_val->data.x_ptr.comptime_var_mem ? 2216297012 : 170810250;
switch (const_val->data.x_ptr.special) {
case ConstPtrSpecialInvalid:
zig_unreachable();
case ConstPtrSpecialRef:
hash_val += 2478261866;
hash_val += hash_ptr(const_val->data.x_ptr.data.ref.pointee);
return hash_val;
case ConstPtrSpecialBaseArray:
hash_val += 1764906839;
hash_val += hash_ptr(const_val->data.x_ptr.data.base_array.array_val);
hash_val += hash_size(const_val->data.x_ptr.data.base_array.elem_index);
hash_val += const_val->data.x_ptr.data.base_array.is_cstr ? 1297263887 : 200363492;
return hash_val;
case ConstPtrSpecialBaseStruct:
hash_val += 3518317043;
hash_val += hash_ptr(const_val->data.x_ptr.data.base_struct.struct_val);
hash_val += hash_size(const_val->data.x_ptr.data.base_struct.field_index);
return hash_val;
case ConstPtrSpecialHardCodedAddr:
hash_val += 4048518294;
hash_val += hash_size(const_val->data.x_ptr.data.hard_coded_addr.addr);
return hash_val;
}
zig_unreachable();
}
case TypeTableEntryIdUndefLit:
return 162837799;
case TypeTableEntryIdNullLit:
@ -3007,7 +3033,6 @@ void init_const_str_lit(CodeGen *g, ConstExprValue *const_val, Buf *str) {
const_val->special = ConstValSpecialStatic;
const_val->type = get_array_type(g, g->builtin_types.entry_u8, buf_len(str));
const_val->data.x_array.elements = allocate<ConstExprValue>(buf_len(str));
const_val->data.x_array.size = buf_len(str);
for (size_t i = 0; i < buf_len(str); i += 1) {
ConstExprValue *this_char = &const_val->data.x_array.elements[i];
@ -3030,7 +3055,6 @@ void init_const_c_str_lit(CodeGen *g, ConstExprValue *const_val, Buf *str) {
array_val->special = ConstValSpecialStatic;
array_val->type = get_array_type(g, g->builtin_types.entry_u8, len_with_null);
array_val->data.x_array.elements = allocate<ConstExprValue>(len_with_null);
array_val->data.x_array.size = len_with_null;
for (size_t i = 0; i < buf_len(str); i += 1) {
ConstExprValue *this_char = &array_val->data.x_array.elements[i];
this_char->special = ConstValSpecialStatic;
@ -3045,9 +3069,10 @@ void init_const_c_str_lit(CodeGen *g, ConstExprValue *const_val, Buf *str) {
// then make the pointer point to it
const_val->special = ConstValSpecialStatic;
const_val->type = get_pointer_to_type(g, g->builtin_types.entry_u8, true);
const_val->data.x_ptr.base_ptr = array_val;
const_val->data.x_ptr.index = 0;
const_val->data.x_ptr.special = ConstPtrSpecialCStr;
const_val->data.x_ptr.special = ConstPtrSpecialBaseArray;
const_val->data.x_ptr.data.base_array.array_val = array_val;
const_val->data.x_ptr.data.base_array.elem_index = 0;
const_val->data.x_ptr.data.base_array.is_cstr = true;
}
ConstExprValue *create_const_c_str_lit(CodeGen *g, Buf *str) {
ConstExprValue *const_val = allocate<ConstExprValue>(1);
@ -3156,7 +3181,7 @@ void init_const_slice(CodeGen *g, ConstExprValue *const_val, ConstExprValue *arr
const_val->type = get_slice_type(g, array_val->type->data.array.child_type, is_const);
const_val->data.x_struct.fields = allocate<ConstExprValue>(2);
init_const_ptr(g, &const_val->data.x_struct.fields[slice_ptr_index], array_val, start, is_const);
init_const_ptr_array(g, &const_val->data.x_struct.fields[slice_ptr_index], array_val, start, is_const);
init_const_usize(g, &const_val->data.x_struct.fields[slice_len_index], len);
}
@ -3166,24 +3191,35 @@ ConstExprValue *create_const_slice(CodeGen *g, ConstExprValue *array_val, size_t
return const_val;
}
void init_const_ptr(CodeGen *g, ConstExprValue *const_val, ConstExprValue *base_ptr, size_t index, bool is_const) {
TypeTableEntry *child_type;
if (index == SIZE_MAX) {
child_type = base_ptr->type;
} else {
assert(base_ptr->type->id == TypeTableEntryIdArray);
child_type = base_ptr->type->data.array.child_type;
}
void init_const_ptr_array(CodeGen *g, ConstExprValue *const_val, ConstExprValue *array_val,
size_t elem_index, bool is_const)
{
assert(array_val->type->id == TypeTableEntryIdArray);
TypeTableEntry *child_type = array_val->type->data.array.child_type;
const_val->special = ConstValSpecialStatic;
const_val->type = get_pointer_to_type(g, child_type, is_const);
const_val->data.x_ptr.base_ptr = base_ptr;
const_val->data.x_ptr.index = index;
const_val->data.x_ptr.special = ConstPtrSpecialBaseArray;
const_val->data.x_ptr.data.base_array.array_val = array_val;
const_val->data.x_ptr.data.base_array.elem_index = elem_index;
}
ConstExprValue *create_const_ptr(CodeGen *g, ConstExprValue *base_ptr, size_t index, bool is_const) {
ConstExprValue *create_const_ptr_array(CodeGen *g, ConstExprValue *array_val, size_t elem_index, bool is_const) {
ConstExprValue *const_val = allocate<ConstExprValue>(1);
init_const_ptr(g, const_val, base_ptr, index, is_const);
init_const_ptr_array(g, const_val, array_val, elem_index, is_const);
return const_val;
}
void init_const_ptr_ref(CodeGen *g, ConstExprValue *const_val, ConstExprValue *pointee_val, bool is_const) {
const_val->special = ConstValSpecialStatic;
const_val->type = get_pointer_to_type(g, pointee_val->type, is_const);
const_val->data.x_ptr.special = ConstPtrSpecialRef;
const_val->data.x_ptr.data.ref.pointee = pointee_val;
}
ConstExprValue *create_const_ptr_ref(CodeGen *g, ConstExprValue *pointee_val, bool is_const) {
ConstExprValue *const_val = allocate<ConstExprValue>(1);
init_const_ptr_ref(g, const_val, pointee_val, is_const);
return const_val;
}
@ -3207,14 +3243,14 @@ void init_const_undefined(CodeGen *g, ConstExprValue *const_val) {
const_val->special = ConstValSpecialStatic;
size_t elem_count = canon_wanted_type->data.array.len;
const_val->data.x_array.elements = allocate<ConstExprValue>(elem_count);
const_val->data.x_array.size = elem_count;
for (size_t i = 0; i < elem_count; i += 1) {
ConstExprValue *element_val = &const_val->data.x_array.elements[i];
element_val->type = canon_wanted_type->data.array.child_type;
init_const_undefined(g, element_val);
if (get_underlying_type(element_val->type)->id == TypeTableEntryIdArray) {
element_val->data.x_array.parent_array = const_val;
element_val->data.x_array.parent_array_index = i;
element_val->data.x_array.parent.id = ConstParentIdArray;
element_val->data.x_array.parent.data.p_array.array_val = const_val;
element_val->data.x_array.parent.data.p_array.elem_index = i;
}
}
} else if (canon_wanted_type->id == TypeTableEntryIdStruct) {
@ -3301,9 +3337,37 @@ bool const_values_equal(ConstExprValue *a, ConstExprValue *b) {
case TypeTableEntryIdEnumTag:
return bignum_cmp_eq(&a->data.x_bignum, &b->data.x_bignum);
case TypeTableEntryIdPointer:
if (a->data.x_ptr.index != b->data.x_ptr.index)
if (a->data.x_ptr.special != b->data.x_ptr.special)
return false;
return a->data.x_ptr.base_ptr == b->data.x_ptr.base_ptr;
if (a->data.x_ptr.comptime_var_mem != b->data.x_ptr.comptime_var_mem)
return false;
switch (a->data.x_ptr.special) {
case ConstPtrSpecialInvalid:
zig_unreachable();
case ConstPtrSpecialRef:
if (a->data.x_ptr.data.ref.pointee != b->data.x_ptr.data.ref.pointee)
return false;
return true;
case ConstPtrSpecialBaseArray:
if (a->data.x_ptr.data.base_array.array_val != b->data.x_ptr.data.base_array.array_val)
return false;
if (a->data.x_ptr.data.base_array.elem_index != b->data.x_ptr.data.base_array.elem_index)
return false;
if (a->data.x_ptr.data.base_array.is_cstr != b->data.x_ptr.data.base_array.is_cstr)
return false;
return true;
case ConstPtrSpecialBaseStruct:
if (a->data.x_ptr.data.base_struct.struct_val != b->data.x_ptr.data.base_struct.struct_val)
return false;
if (a->data.x_ptr.data.base_struct.field_index != b->data.x_ptr.data.base_struct.field_index)
return false;
return true;
case ConstPtrSpecialHardCodedAddr:
if (a->data.x_ptr.data.hard_coded_addr.addr != b->data.x_ptr.data.hard_coded_addr.addr)
return false;
return true;
}
zig_unreachable();
case TypeTableEntryIdArray:
zig_panic("TODO");
case TypeTableEntryIdStruct:
@ -3482,15 +3546,29 @@ void render_const_value(Buf *buf, ConstExprValue *const_val) {
return;
}
case TypeTableEntryIdPointer:
buf_appendf(buf, "&");
if (const_val->data.x_ptr.special == ConstPtrSpecialRuntime) {
buf_appendf(buf, "(runtime pointer value)");
} else if (const_val->data.x_ptr.special == ConstPtrSpecialCStr) {
buf_appendf(buf, "(c str lit)");
} else {
render_const_value(buf, const_ptr_pointee(const_val));
switch (const_val->data.x_ptr.special) {
case ConstPtrSpecialInvalid:
zig_unreachable();
case ConstPtrSpecialRef:
case ConstPtrSpecialBaseStruct:
buf_appendf(buf, "&");
render_const_value(buf, const_ptr_pointee(const_val));
return;
case ConstPtrSpecialBaseArray:
if (const_val->data.x_ptr.data.base_array.is_cstr) {
buf_appendf(buf, "&(c str lit)");
return;
} else {
buf_appendf(buf, "&");
render_const_value(buf, const_ptr_pointee(const_val));
return;
}
case ConstPtrSpecialHardCodedAddr:
buf_appendf(buf, "(&%s)(%" PRIx64 ")", buf_ptr(&canon_type->data.pointer.child_type->name),
const_val->data.x_ptr.data.hard_coded_addr.addr);
return;
}
return;
zig_unreachable();
case TypeTableEntryIdFn:
{
FnTableEntry *fn_entry = const_val->data.x_fn;

9
src/analyze.hpp
View File

@ -126,9 +126,12 @@ ConstExprValue *create_const_type(CodeGen *g, TypeTableEntry *type_value);
void init_const_runtime(ConstExprValue *const_val, TypeTableEntry *type);
ConstExprValue *create_const_runtime(TypeTableEntry *type);
void init_const_ptr(CodeGen *g, ConstExprValue *const_val, ConstExprValue *base_ptr, size_t index, bool is_const);
ConstExprValue *create_const_ptr(CodeGen *g, ConstExprValue *const_val, ConstExprValue *base_ptr,
size_t index, bool is_const);
void init_const_ptr_ref(CodeGen *g, ConstExprValue *const_val, ConstExprValue *pointee_val, bool is_const);
ConstExprValue *create_const_ptr_ref(CodeGen *g, ConstExprValue *pointee_val, bool is_const);
void init_const_ptr_array(CodeGen *g, ConstExprValue *const_val, ConstExprValue *array_val,
size_t elem_index, bool is_const);
ConstExprValue *create_const_ptr_array(CodeGen *g, ConstExprValue *array_val, size_t elem_index, bool is_const);
void init_const_slice(CodeGen *g, ConstExprValue *const_val, ConstExprValue *array_val,
size_t start, size_t len, bool is_const);

131
src/codegen.cpp
View File

@ -2527,17 +2527,29 @@ static void ir_render(CodeGen *g, FnTableEntry *fn_entry) {
}
}
static LLVMValueRef gen_const_ptr_array_recursive(CodeGen *g, ConstExprValue *array_const_val, size_t index) {
ConstExprValue *parent_array = array_const_val->data.x_array.parent_array;
LLVMValueRef base_ptr;
if (parent_array) {
size_t parent_array_index = array_const_val->data.x_array.parent_array_index;
base_ptr = gen_const_ptr_array_recursive(g, parent_array, parent_array_index);
} else {
render_const_val(g, array_const_val);
render_const_val_global(g, array_const_val, "");
base_ptr = array_const_val->llvm_global;
static LLVMValueRef gen_const_ptr_struct_recursive(CodeGen *g, ConstExprValue *struct_const_val, size_t field_index);
static LLVMValueRef gen_const_ptr_array_recursive(CodeGen *g, ConstExprValue *array_const_val, size_t index);
static LLVMValueRef gen_parent_ptr(CodeGen *g, ConstExprValue *val, ConstParent *parent) {
switch (parent->id) {
case ConstParentIdNone:
render_const_val(g, val);
render_const_val_global(g, val, "");
return val->llvm_global;
case ConstParentIdStruct:
return gen_const_ptr_struct_recursive(g, parent->data.p_struct.struct_val,
parent->data.p_struct.field_index);
case ConstParentIdArray:
return gen_const_ptr_array_recursive(g, parent->data.p_array.array_val,
parent->data.p_array.elem_index);
}
zig_unreachable();
}
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;
LLVMValueRef base_ptr = gen_parent_ptr(g, array_const_val, parent);
TypeTableEntry *usize = g->builtin_types.entry_usize;
LLVMValueRef indices[] = {
LLVMConstNull(usize->type_ref),
@ -2546,6 +2558,19 @@ static LLVMValueRef gen_const_ptr_array_recursive(CodeGen *g, ConstExprValue *ar
return LLVMConstInBoundsGEP(base_ptr, indices, 2);
}
static LLVMValueRef gen_const_ptr_struct_recursive(CodeGen *g, ConstExprValue *struct_const_val, size_t field_index) {
ConstParent *parent = &struct_const_val->data.x_struct.parent;
LLVMValueRef base_ptr = gen_parent_ptr(g, struct_const_val, parent);
TypeTableEntry *u32 = g->builtin_types.entry_u32;
LLVMValueRef indices[] = {
LLVMConstNull(u32->type_ref),
LLVMConstInt(u32->type_ref, field_index, false),
};
return LLVMConstInBoundsGEP(base_ptr, indices, 2);
}
static LLVMValueRef gen_const_val(CodeGen *g, ConstExprValue *const_val) {
TypeTableEntry *canon_type = get_underlying_type(const_val->type);
assert(!canon_type->zero_bits);
@ -2684,38 +2709,70 @@ static LLVMValueRef gen_const_val(CodeGen *g, ConstExprValue *const_val) {
case TypeTableEntryIdPointer:
{
render_const_val_global(g, const_val, "");
size_t index = const_val->data.x_ptr.index;
ConstExprValue *base_ptr = const_val->data.x_ptr.base_ptr;
if (base_ptr) {
if (index == SIZE_MAX) {
render_const_val(g, base_ptr);
render_const_val_global(g, base_ptr, "");
ConstExprValue *other_val = base_ptr;
const_val->llvm_value = LLVMConstBitCast(other_val->llvm_global, const_val->type->type_ref);
render_const_val_global(g, const_val, "");
return const_val->llvm_value;
} else {
ConstExprValue *array_const_val = base_ptr;
assert(array_const_val->type->id == TypeTableEntryIdArray);
if (array_const_val->type->zero_bits) {
// make this a null pointer
switch (const_val->data.x_ptr.special) {
case ConstPtrSpecialInvalid:
zig_unreachable();
case ConstPtrSpecialRef:
{
ConstExprValue *pointee = const_val->data.x_ptr.data.ref.pointee;
render_const_val(g, pointee);
render_const_val_global(g, pointee, "");
ConstExprValue *other_val = pointee;
const_val->llvm_value = LLVMConstBitCast(other_val->llvm_global, const_val->type->type_ref);
render_const_val_global(g, const_val, "");
return const_val->llvm_value;
}
case ConstPtrSpecialBaseArray:
{
ConstExprValue *array_const_val = const_val->data.x_ptr.data.base_array.array_val;
size_t elem_index = const_val->data.x_ptr.data.base_array.elem_index;
assert(array_const_val->type->id == TypeTableEntryIdArray);
if (array_const_val->type->zero_bits) {
// make this a null pointer
TypeTableEntry *usize = g->builtin_types.entry_usize;
const_val->llvm_value = LLVMConstIntToPtr(LLVMConstNull(usize->type_ref),
const_val->type->type_ref);
render_const_val_global(g, const_val, "");
return const_val->llvm_value;
}
LLVMValueRef uncasted_ptr_val = gen_const_ptr_array_recursive(g, array_const_val,
elem_index);
LLVMValueRef ptr_val = LLVMConstBitCast(uncasted_ptr_val, const_val->type->type_ref);
const_val->llvm_value = ptr_val;
render_const_val_global(g, const_val, "");
return ptr_val;
}
case ConstPtrSpecialBaseStruct:
{
ConstExprValue *struct_const_val = const_val->data.x_ptr.data.base_struct.struct_val;
assert(struct_const_val->type->id == TypeTableEntryIdStruct);
if (struct_const_val->type->zero_bits) {
// make this a null pointer
TypeTableEntry *usize = g->builtin_types.entry_usize;
const_val->llvm_value = LLVMConstIntToPtr(LLVMConstNull(usize->type_ref),
const_val->type->type_ref);
render_const_val_global(g, const_val, "");
return const_val->llvm_value;
}
size_t src_field_index = const_val->data.x_ptr.data.base_struct.field_index;
size_t gen_field_index =
struct_const_val->type->data.structure.fields[src_field_index].gen_index;
LLVMValueRef uncasted_ptr_val = gen_const_ptr_struct_recursive(g, struct_const_val,
gen_field_index);
LLVMValueRef ptr_val = LLVMConstBitCast(uncasted_ptr_val, const_val->type->type_ref);
const_val->llvm_value = ptr_val;
render_const_val_global(g, const_val, "");
return ptr_val;
}
case ConstPtrSpecialHardCodedAddr:
{
uint64_t addr_value = const_val->data.x_ptr.data.hard_coded_addr.addr;
TypeTableEntry *usize = g->builtin_types.entry_usize;
const_val->llvm_value = LLVMConstIntToPtr(LLVMConstNull(usize->type_ref),
const_val->llvm_value = LLVMConstIntToPtr(LLVMConstInt(usize->type_ref, addr_value, false),
const_val->type->type_ref);
render_const_val_global(g, const_val, "");
return const_val->llvm_value;
}
LLVMValueRef uncasted_ptr_val = gen_const_ptr_array_recursive(g, array_const_val, index);
LLVMValueRef ptr_val = LLVMConstBitCast(uncasted_ptr_val, const_val->type->type_ref);
const_val->llvm_value = ptr_val;
render_const_val_global(g, const_val, "");
return ptr_val;
}
} else {
TypeTableEntry *usize = g->builtin_types.entry_usize;
const_val->llvm_value = LLVMConstIntToPtr(LLVMConstInt(usize->type_ref, index, false), const_val->type->type_ref);
render_const_val_global(g, const_val, "");
return const_val->llvm_value;
}
}
case TypeTableEntryIdErrorUnion:

556
src/ir.cpp
View File

@ -64,16 +64,21 @@ static IrInstruction *ir_implicit_cast(IrAnalyze *ira, IrInstruction *value, Typ
ConstExprValue *const_ptr_pointee(ConstExprValue *const_val) {
assert(const_val->special == ConstValSpecialStatic);
assert(const_val->data.x_ptr.special != ConstPtrSpecialRuntime);
ConstExprValue *base_ptr = const_val->data.x_ptr.base_ptr;
size_t index = const_val->data.x_ptr.index;
if (index == SIZE_MAX) {
return base_ptr;
} else {
assert(index < base_ptr->data.x_array.size);
return &base_ptr->data.x_array.elements[index];
switch (const_val->data.x_ptr.special) {
case ConstPtrSpecialInvalid:
zig_unreachable();
case ConstPtrSpecialRef:
return const_val->data.x_ptr.data.ref.pointee;
case ConstPtrSpecialBaseArray:
return &const_val->data.x_ptr.data.base_array.array_val->data.x_array.elements[
const_val->data.x_ptr.data.base_array.elem_index];
case ConstPtrSpecialBaseStruct:
return &const_val->data.x_ptr.data.base_struct.struct_val->data.x_struct.fields[
const_val->data.x_ptr.data.base_struct.field_index];
case ConstPtrSpecialHardCodedAddr:
zig_unreachable();
}
zig_unreachable();
}
static bool ir_should_inline(IrExecutable *exec, Scope *scope) {
@ -6209,7 +6214,7 @@ static TypeTableEntry *ir_analyze_void(IrAnalyze *ira, IrInstruction *instructio
static TypeTableEntry *ir_analyze_const_ptr(IrAnalyze *ira, IrInstruction *instruction,
ConstExprValue *pointee, TypeTableEntry *pointee_type,
ConstPtrSpecial special, bool ptr_is_const, bool ptr_is_volatile)
bool comptime_var_mem, bool ptr_is_const, bool ptr_is_volatile)
{
if (pointee_type->id == TypeTableEntryIdMetaType) {
TypeTableEntry *type_entry = pointee->data.x_type;
@ -6227,9 +6232,9 @@ static TypeTableEntry *ir_analyze_const_ptr(IrAnalyze *ira, IrInstruction *instr
TypeTableEntry *ptr_type = get_pointer_to_type_volatile(ira->codegen, pointee_type,
ptr_is_const, ptr_is_volatile);
ConstExprValue *const_val = ir_build_const_from(ira, instruction);
const_val->data.x_ptr.base_ptr = pointee;
const_val->data.x_ptr.index = SIZE_MAX;
const_val->data.x_ptr.special = special;
const_val->data.x_ptr.special = ConstPtrSpecialRef;
const_val->data.x_ptr.comptime_var_mem = comptime_var_mem;
const_val->data.x_ptr.data.ref.pointee = pointee;
return ptr_type;
}
}
@ -6471,8 +6476,8 @@ static IrInstruction *ir_analyze_cast_ref(IrAnalyze *ira, IrInstruction *source_
source_instr->scope, source_instr->source_node);
const_instruction->base.value.type = wanted_type;
const_instruction->base.value.special = ConstValSpecialStatic;
const_instruction->base.value.data.x_ptr.base_ptr = val;
const_instruction->base.value.data.x_ptr.index = SIZE_MAX;
const_instruction->base.value.data.x_ptr.special = ConstPtrSpecialRef;
const_instruction->base.value.data.x_ptr.data.ref.pointee = val;
return &const_instruction->base;
}
@ -6608,10 +6613,10 @@ static IrInstruction *ir_analyze_ptr_to_int(IrAnalyze *ira, IrInstruction *sourc
ConstExprValue *val = ir_resolve_const(ira, target, UndefBad);
if (!val)
return ira->codegen->invalid_instruction;
if (val->data.x_ptr.special == ConstPtrSpecialRuntime) {
if (val->data.x_ptr.special == ConstPtrSpecialHardCodedAddr) {
IrInstruction *result = ir_create_const(&ira->new_irb, source_instr->scope,
source_instr->source_node, wanted_type);
bignum_init_unsigned(&result->value.data.x_bignum, val->data.x_ptr.index);
bignum_init_unsigned(&result->value.data.x_bignum, val->data.x_ptr.data.hard_coded_addr.addr);
return result;
}
}
@ -6633,9 +6638,8 @@ static IrInstruction *ir_analyze_int_to_ptr(IrAnalyze *ira, IrInstruction *sourc
return ira->codegen->invalid_instruction;
IrInstruction *result = ir_create_const(&ira->new_irb, source_instr->scope,
source_instr->source_node, wanted_type);
result->value.data.x_ptr.base_ptr = nullptr;
result->value.data.x_ptr.index = bignum_to_twos_complement(&val->data.x_bignum);
result->value.data.x_ptr.special = ConstPtrSpecialRuntime;
result->value.data.x_ptr.special = ConstPtrSpecialHardCodedAddr;
result->value.data.x_ptr.data.hard_coded_addr.addr = bignum_to_twos_complement(&val->data.x_bignum);
return result;
}
@ -6660,9 +6664,8 @@ static IrInstruction *ir_analyze_int_lit_to_ptr(IrAnalyze *ira, IrInstruction *s
IrInstruction *result = ir_create_const(&ira->new_irb, source_instr->scope,
source_instr->source_node, wanted_type);
result->value.data.x_ptr.base_ptr = nullptr;
result->value.data.x_ptr.index = bignum_to_twos_complement(&val->data.x_bignum);
result->value.data.x_ptr.special = ConstPtrSpecialRuntime;
result->value.data.x_ptr.special = ConstPtrSpecialHardCodedAddr;
result->value.data.x_ptr.data.hard_coded_addr.addr = bignum_to_twos_complement(&val->data.x_bignum);
return result;
}
@ -7006,17 +7009,22 @@ static IrInstruction *ir_get_deref(IrAnalyze *ira, IrInstruction *source_instruc
return ira->codegen->invalid_instruction;
} else if (type_entry->id == TypeTableEntryIdPointer) {
TypeTableEntry *child_type = type_entry->data.pointer.child_type;
if (ptr->value.special != ConstValSpecialRuntime) {
ConstExprValue *pointee = const_ptr_pointee(&ptr->value);
if (pointee->special != ConstValSpecialRuntime) {
IrInstruction *result = ir_create_const(&ira->new_irb, source_instruction->scope,
source_instruction->source_node, child_type);
result->value = *pointee;
return result;
if (instr_is_comptime(ptr)) {
// Dereferencing a mutable pointer at compile time is not allowed
// unless that pointer is from a comptime variable
if (type_entry->data.pointer.is_const || ptr->value.data.x_ptr.comptime_var_mem) {
ConstExprValue *pointee = const_ptr_pointee(&ptr->value);
if (pointee->special != ConstValSpecialRuntime) {
IrInstruction *result = ir_create_const(&ira->new_irb, source_instruction->scope,
source_instruction->source_node, child_type);
result->value = *pointee;
return result;
}
}
}
// TODO if the instruction is a get pointer instruction we can skip it
IrInstruction *load_ptr_instruction = ir_build_load_ptr(&ira->new_irb, source_instruction->scope, source_instruction->source_node, ptr);
// TODO if the instruction is a const ref instruction we can skip it
IrInstruction *load_ptr_instruction = ir_build_load_ptr(&ira->new_irb, source_instruction->scope,
source_instruction->source_node, ptr);
load_ptr_instruction->value.type = child_type;
return load_ptr_instruction;
} else if (type_entry->id == TypeTableEntryIdMetaType) {
@ -7052,8 +7060,7 @@ static TypeTableEntry *ir_analyze_ref(IrAnalyze *ira, IrInstruction *source_inst
ConstExprValue *val = ir_resolve_const(ira, value, UndefBad);
if (!val)
return ira->codegen->builtin_types.entry_invalid;
return ir_analyze_const_ptr(ira, source_instruction, val, value->value.type,
ConstPtrSpecialNone, is_const, is_volatile);
return ir_analyze_const_ptr(ira, source_instruction, val, value->value.type, false, is_const, is_volatile);
}
TypeTableEntry *ptr_type = get_pointer_to_type_volatile(ira->codegen, value->value.type, is_const, is_volatile);
@ -7136,13 +7143,14 @@ static Buf *ir_resolve_str(IrAnalyze *ira, IrInstruction *value) {
ConstExprValue *ptr_field = &const_val->data.x_struct.fields[slice_ptr_index];
ConstExprValue *len_field = &const_val->data.x_struct.fields[slice_len_index];
ConstExprValue *array_val = ptr_field->data.x_ptr.base_ptr;
assert(ptr_field->data.x_ptr.index != SIZE_MAX);
assert(ptr_field->data.x_ptr.special == ConstPtrSpecialBaseArray);
ConstExprValue *array_val = ptr_field->data.x_ptr.data.base_array.array_val;
size_t len = len_field->data.x_bignum.data.x_uint;
Buf *result = buf_alloc();
buf_resize(result, len);
for (size_t i = 0; i < len; i += 1) {
size_t new_index = ptr_field->data.x_ptr.index + i;
size_t new_index = ptr_field->data.x_ptr.data.base_array.elem_index + i;
ConstExprValue *char_val = &array_val->data.x_array.elements[new_index];
uint64_t big_c = char_val->data.x_bignum.data.x_uint;
assert(big_c <= UINT8_MAX);
@ -7591,22 +7599,24 @@ static TypeTableEntry *ir_analyze_array_cat(IrAnalyze *ira, IrInstructionBinOp *
child_type = op1_canon_type->data.array.child_type;
op1_array_val = op1_val;
op1_array_index = 0;
op1_array_end = op1_val->data.x_array.size;
op1_array_end = op1_canon_type->data.array.len;
} else if (op1_canon_type->id == TypeTableEntryIdPointer &&
op1_canon_type->data.pointer.child_type == ira->codegen->builtin_types.entry_u8 &&
op1_val->data.x_ptr.special == ConstPtrSpecialCStr)
op1_val->data.x_ptr.special == ConstPtrSpecialBaseArray &&
op1_val->data.x_ptr.data.base_array.is_cstr)
{
child_type = op1_canon_type->data.pointer.child_type;
op1_array_val = op1_val->data.x_ptr.base_ptr;
op1_array_index = op1_val->data.x_ptr.index;
op1_array_end = op1_array_val->data.x_array.size - 1;
op1_array_val = op1_val->data.x_ptr.data.base_array.array_val;
op1_array_index = op1_val->data.x_ptr.data.base_array.elem_index;
op1_array_end = op1_array_val->type->data.array.len - 1;
} else if (is_slice(op1_canon_type)) {
TypeTableEntry *ptr_type = op1_canon_type->data.structure.fields[slice_ptr_index].type_entry;
child_type = ptr_type->data.pointer.child_type;
ConstExprValue *ptr_val = &op1_val->data.x_struct.fields[slice_ptr_index];
op1_array_val = ptr_val->data.x_ptr.base_ptr;
op1_array_index = ptr_val->data.x_ptr.index;
op1_array_end = op1_array_val->data.x_array.size;
assert(ptr_val->data.x_ptr.special == ConstPtrSpecialBaseArray);
op1_array_val = ptr_val->data.x_ptr.data.base_array.array_val;
op1_array_index = ptr_val->data.x_ptr.data.base_array.elem_index;
op1_array_end = op1_array_val->type->data.array.len;
} else {
ir_add_error(ira, op1,
buf_sprintf("expected array or C string literal, found '%s'", buf_ptr(&op1->value.type->name)));
@ -7626,10 +7636,11 @@ static TypeTableEntry *ir_analyze_array_cat(IrAnalyze *ira, IrInstructionBinOp *
}
op2_array_val = op2_val;
op2_array_index = 0;
op2_array_end = op2_array_val->data.x_array.size;
op2_array_end = op2_array_val->type->data.array.len;
} else if (op2_canon_type->id == TypeTableEntryIdPointer &&
op2_canon_type->data.pointer.child_type == ira->codegen->builtin_types.entry_u8 &&
op2_val->data.x_ptr.special == ConstPtrSpecialCStr)
op2_val->data.x_ptr.special == ConstPtrSpecialBaseArray &&
op2_val->data.x_ptr.data.base_array.is_cstr)
{
if (child_type != ira->codegen->builtin_types.entry_u8) {
ir_add_error(ira, op2, buf_sprintf("expected array of type '%s', found '%s'",
@ -7637,9 +7648,9 @@ static TypeTableEntry *ir_analyze_array_cat(IrAnalyze *ira, IrInstructionBinOp *
buf_ptr(&op2->value.type->name)));
return ira->codegen->builtin_types.entry_invalid;
}
op2_array_val = op2_val->data.x_ptr.base_ptr;
op2_array_index = op2_val->data.x_ptr.index;
op2_array_end = op2_array_val->data.x_array.size - 1;
op2_array_val = op2_val->data.x_ptr.data.base_array.array_val;
op2_array_index = op2_val->data.x_ptr.data.base_array.elem_index;
op2_array_end = op2_array_val->type->data.array.len - 1;
} else if (is_slice(op2_canon_type)) {
TypeTableEntry *ptr_type = op2_canon_type->data.structure.fields[slice_ptr_index].type_entry;
if (ptr_type->data.pointer.child_type != child_type) {
@ -7649,9 +7660,10 @@ static TypeTableEntry *ir_analyze_array_cat(IrAnalyze *ira, IrInstructionBinOp *
return ira->codegen->builtin_types.entry_invalid;
}
ConstExprValue *ptr_val = &op2_val->data.x_struct.fields[slice_ptr_index];
op2_array_val = ptr_val->data.x_ptr.base_ptr;
op2_array_index = ptr_val->data.x_ptr.index;
op2_array_end = op2_array_val->data.x_array.size;
assert(ptr_val->data.x_ptr.special == ConstPtrSpecialBaseArray);
op2_array_val = ptr_val->data.x_ptr.data.base_array.array_val;
op2_array_index = ptr_val->data.x_ptr.data.base_array.elem_index;
op2_array_end = op2_array_val->type->data.array.len;
} else {
ir_add_error(ira, op2,
buf_sprintf("expected array or C string literal, found '%s'", buf_ptr(&op2->value.type->name)));
@ -7676,12 +7688,12 @@ static TypeTableEntry *ir_analyze_array_cat(IrAnalyze *ira, IrInstructionBinOp *
out_array_val = allocate<ConstExprValue>(1);
out_array_val->special = ConstValSpecialStatic;
out_array_val->type = get_array_type(ira->codegen, child_type, new_len);
out_val->data.x_ptr.base_ptr = out_array_val;
out_val->data.x_ptr.index = 0;
out_val->data.x_ptr.special = ConstPtrSpecialCStr;
out_val->data.x_ptr.special = ConstPtrSpecialBaseArray;
out_val->data.x_ptr.data.base_array.is_cstr = true;
out_val->data.x_ptr.data.base_array.array_val = out_array_val;
out_val->data.x_ptr.data.base_array.elem_index = 0;
}
out_array_val->data.x_array.elements = allocate<ConstExprValue>(new_len);
out_array_val->data.x_array.size = new_len;
size_t next_index = 0;
for (size_t i = op1_array_index; i < op1_array_end; i += 1, next_index += 1) {
@ -7736,7 +7748,6 @@ static TypeTableEntry *ir_analyze_array_mult(IrAnalyze *ira, IrInstructionBinOp
ConstExprValue *out_val = ir_build_const_from(ira, &instruction->base);
uint64_t new_array_len = array_len.data.x_uint;
out_val->data.x_array.size = new_array_len;
out_val->data.x_array.elements = allocate<ConstExprValue>(new_array_len);
uint64_t i = 0;
@ -8721,24 +8732,23 @@ static TypeTableEntry *ir_analyze_var_ptr(IrAnalyze *ira, IrInstruction *instruc
if (var->value.type->id == TypeTableEntryIdInvalid)
return var->value.type;
bool is_comptime = ir_get_var_is_comptime(var);
bool comptime_var_mem = ir_get_var_is_comptime(var);
ConstExprValue *mem_slot = nullptr;
FnTableEntry *fn_entry = scope_fn_entry(var->parent_scope);
if (var->src_is_const && var->value.special == ConstValSpecialStatic) {
if (var->value.special == ConstValSpecialStatic) {
mem_slot = &var->value;
assert(mem_slot->special != ConstValSpecialRuntime);
} else if (fn_entry) {
// TODO once the analyze code is fully ported over to IR we won't need this SIZE_MAX thing.
if (var->mem_slot_index != SIZE_MAX && (is_comptime || var->gen_is_const))
if (var->mem_slot_index != SIZE_MAX && (comptime_var_mem || var->gen_is_const))
mem_slot = &ira->exec_context.mem_slot_list[var->mem_slot_index];
}
bool is_const = (var->value.type->id == TypeTableEntryIdMetaType) ? is_const_ptr : var->src_is_const;
bool is_volatile = (var->value.type->id == TypeTableEntryIdMetaType) ? is_volatile_ptr : false;
if (mem_slot && mem_slot->special != ConstValSpecialRuntime) {
ConstPtrSpecial ptr_special = is_comptime ? ConstPtrSpecialInline : ConstPtrSpecialNone;
return ir_analyze_const_ptr(ira, instruction, mem_slot, var->value.type, ptr_special, is_const, is_volatile);
return ir_analyze_const_ptr(ira, instruction, mem_slot, var->value.type,
comptime_var_mem, is_const, is_volatile);
} else {
ir_build_var_ptr_from(&ira->new_irb, instruction, var, is_const, is_volatile);
type_ensure_zero_bits_known(ira->codegen, var->value.type);
@ -8793,7 +8803,8 @@ static TypeTableEntry *ir_analyze_instruction_elem_ptr(IrAnalyze *ira, IrInstruc
buf_sprintf("index 0 outside array of size 0"));
}
TypeTableEntry *child_type = array_type->data.array.child_type;
return_type = get_pointer_to_type(ira->codegen, child_type, false);
return_type = get_pointer_to_type_volatile(ira->codegen, child_type,
ptr_type->data.pointer.is_const, ptr_type->data.pointer.is_volatile);
} else if (array_type->id == TypeTableEntryIdPointer) {
return_type = array_type;
} else if (is_slice(array_type)) {
@ -8826,8 +8837,7 @@ static TypeTableEntry *ir_analyze_instruction_elem_ptr(IrAnalyze *ira, IrInstruc
is_const, is_volatile);
} else {
return ir_analyze_const_ptr(ira, &elem_ptr_instruction->base, &ira->codegen->const_void_val,
ira->codegen->builtin_types.entry_void, ConstPtrSpecialNone,
is_const, is_volatile);
ira->codegen->builtin_types.entry_void, false, is_const, is_volatile);
}
} else {
ir_add_error_node(ira, elem_ptr_instruction->base.source_node,
@ -8858,30 +8868,54 @@ static TypeTableEntry *ir_analyze_instruction_elem_ptr(IrAnalyze *ira, IrInstruc
if (array_ptr->value.special != ConstValSpecialRuntime &&
(array_ptr_val = const_ptr_pointee(&array_ptr->value)) &&
array_ptr_val->special != ConstValSpecialRuntime &&
(array_type->id != TypeTableEntryIdPointer || array_ptr_val->data.x_ptr.special != ConstPtrSpecialRuntime))
(array_type->id != TypeTableEntryIdPointer ||
array_ptr_val->data.x_ptr.special != ConstPtrSpecialHardCodedAddr))
{
ConstExprValue *out_val = ir_build_const_from(ira, &elem_ptr_instruction->base);
out_val->data.x_ptr.comptime_var_mem = array_ptr->value.data.x_ptr.comptime_var_mem;
if (array_type->id == TypeTableEntryIdPointer) {
size_t offset = array_ptr_val->data.x_ptr.index;
size_t new_index;
size_t mem_size;
size_t old_size;
if (offset == SIZE_MAX) {
new_index = SIZE_MAX;
mem_size = 1;
old_size = 1;
} else {
new_index = offset + index;
mem_size = array_ptr_val->data.x_ptr.base_ptr->data.x_array.size;
old_size = mem_size - offset;
switch (array_ptr_val->data.x_ptr.special) {
case ConstPtrSpecialInvalid:
zig_unreachable();
case ConstPtrSpecialRef:
mem_size = 1;
old_size = 1;
new_index = index;
out_val->data.x_ptr.special = ConstPtrSpecialRef;
out_val->data.x_ptr.data.ref.pointee = array_ptr_val->data.x_ptr.data.ref.pointee;
break;
case ConstPtrSpecialBaseArray:
{
size_t offset = array_ptr_val->data.x_ptr.data.base_array.elem_index;
new_index = offset + index;
mem_size = array_ptr_val->data.x_ptr.data.base_array.array_val->type->data.array.len;
old_size = mem_size - offset;
assert(array_ptr_val->data.x_ptr.data.base_array.array_val);
out_val->data.x_ptr.special = ConstPtrSpecialBaseArray;
out_val->data.x_ptr.data.base_array.array_val =
array_ptr_val->data.x_ptr.data.base_array.array_val;
out_val->data.x_ptr.data.base_array.elem_index = new_index;
out_val->data.x_ptr.data.base_array.is_cstr =
array_ptr_val->data.x_ptr.data.base_array.is_cstr;
break;
}
case ConstPtrSpecialBaseStruct:
zig_panic("TODO elem ptr on a const inner struct");
case ConstPtrSpecialHardCodedAddr:
zig_unreachable();
}
if (new_index >= mem_size) {
ir_add_error_node(ira, elem_ptr_instruction->base.source_node,
buf_sprintf("index %" PRIu64 " outside pointer of size %" PRIu64, index, old_size));
return ira->codegen->builtin_types.entry_invalid;
}
out_val->data.x_ptr.base_ptr = array_ptr_val->data.x_ptr.base_ptr;
out_val->data.x_ptr.index = new_index;
} else if (is_slice(array_type)) {
ConstExprValue *ptr_field = &array_ptr_val->data.x_struct.fields[slice_ptr_index];
ConstExprValue *len_field = &array_ptr_val->data.x_struct.fields[slice_len_index];
@ -8892,18 +8926,35 @@ static TypeTableEntry *ir_analyze_instruction_elem_ptr(IrAnalyze *ira, IrInstruc
index, slice_len));
return ira->codegen->builtin_types.entry_invalid;
}
out_val->data.x_ptr.base_ptr = ptr_field->data.x_ptr.base_ptr;
size_t offset = ptr_field->data.x_ptr.index;
if (offset == SIZE_MAX) {
out_val->data.x_ptr.index = SIZE_MAX;
} else {
uint64_t new_index = offset + index;
assert(new_index < ptr_field->data.x_ptr.base_ptr->data.x_array.size);
out_val->data.x_ptr.index = new_index;
switch (ptr_field->data.x_ptr.special) {
case ConstPtrSpecialInvalid:
zig_unreachable();
case ConstPtrSpecialRef:
out_val->data.x_ptr.special = ConstPtrSpecialRef;
out_val->data.x_ptr.data.ref.pointee = ptr_field->data.x_ptr.data.ref.pointee;
break;
case ConstPtrSpecialBaseArray:
{
size_t offset = ptr_field->data.x_ptr.data.base_array.elem_index;
uint64_t new_index = offset + index;
assert(new_index < ptr_field->data.x_ptr.data.base_array.array_val->type->data.array.len);
out_val->data.x_ptr.special = ConstPtrSpecialBaseArray;
out_val->data.x_ptr.data.base_array.array_val =
ptr_field->data.x_ptr.data.base_array.array_val;
out_val->data.x_ptr.data.base_array.elem_index = new_index;
out_val->data.x_ptr.data.base_array.is_cstr =
ptr_field->data.x_ptr.data.base_array.is_cstr;
break;
}
case ConstPtrSpecialBaseStruct:
zig_panic("TODO elem ptr on a slice backed by const inner struct");
case ConstPtrSpecialHardCodedAddr:
zig_unreachable();
}
} else if (array_type->id == TypeTableEntryIdArray) {
out_val->data.x_ptr.base_ptr = array_ptr_val;
out_val->data.x_ptr.index = index;
out_val->data.x_ptr.special = ConstPtrSpecialBaseArray;
out_val->data.x_ptr.data.base_array.array_val = array_ptr_val;
out_val->data.x_ptr.data.base_array.elem_index = index;
} else {
zig_unreachable();
}
@ -8931,6 +8982,9 @@ static TypeTableEntry *ir_analyze_container_member_access_inner(IrAnalyze *ira,
return ira->codegen->builtin_types.entry_invalid;
TldFn *tld_fn = (TldFn *)tld;
FnTableEntry *fn_entry = tld_fn->fn_entry;
if (fn_entry->type_entry->id == TypeTableEntryIdInvalid)
return ira->codegen->builtin_types.entry_invalid;
IrInstruction *bound_fn_value = ir_build_const_bound_fn(&ira->new_irb, field_ptr_instruction->base.scope,
field_ptr_instruction->base.source_node, fn_entry, container_ptr);
return ir_analyze_ref(ira, &field_ptr_instruction->base, bound_fn_value, true, false);
@ -8962,15 +9016,17 @@ static TypeTableEntry *ir_analyze_container_field_ptr(IrAnalyze *ira, Buf *field
if (!ptr_val)
return ira->codegen->builtin_types.entry_invalid;
if (ptr_val->data.x_ptr.special != ConstPtrSpecialRuntime) {
if (ptr_val->data.x_ptr.special != ConstPtrSpecialHardCodedAddr) {
ConstExprValue *struct_val = const_ptr_pointee(ptr_val);
if (value_is_comptime(struct_val)) {
ConstExprValue *field_val = &struct_val->data.x_struct.fields[field->src_index];
if (value_is_comptime(field_val)) {
return ir_analyze_const_ptr(ira, &field_ptr_instruction->base, field_val,
field_val->type, ConstPtrSpecialNone, is_const, is_volatile);
}
}
ConstExprValue *field_val = &struct_val->data.x_struct.fields[field->src_index];
TypeTableEntry *ptr_type = get_pointer_to_type_volatile(ira->codegen, field_val->type,
is_const, is_volatile);
ConstExprValue *const_val = ir_build_const_from(ira, &field_ptr_instruction->base);
const_val->data.x_ptr.special = ConstPtrSpecialBaseStruct;
const_val->data.x_ptr.comptime_var_mem = container_ptr->value.data.x_ptr.comptime_var_mem;
const_val->data.x_ptr.data.base_struct.struct_val = struct_val;
const_val->data.x_ptr.data.base_struct.field_index = field->src_index;
return ptr_type;
}
}
ir_build_struct_field_ptr_from(&ira->new_irb, &field_ptr_instruction->base, container_ptr, field);
@ -9032,7 +9088,7 @@ static TypeTableEntry *ir_analyze_decl_ref(IrAnalyze *ira, IrInstruction *source
bool ptr_is_const = true;
bool ptr_is_volatile = false;
return ir_analyze_const_ptr(ira, source_instruction, const_val, fn_entry->type_entry,
ConstPtrSpecialNone, ptr_is_const, ptr_is_volatile);
false, ptr_is_const, ptr_is_volatile);
}
case TldIdTypeDef:
{
@ -9049,7 +9105,7 @@ static TypeTableEntry *ir_analyze_decl_ref(IrAnalyze *ira, IrInstruction *source
bool ptr_is_const = true;
bool ptr_is_volatile = false;
return ir_analyze_const_ptr(ira, source_instruction, const_val, ira->codegen->builtin_types.entry_type,
ConstPtrSpecialNone, ptr_is_const, ptr_is_volatile);
false, ptr_is_const, ptr_is_volatile);
}
}
zig_unreachable();
@ -9092,7 +9148,7 @@ static TypeTableEntry *ir_analyze_instruction_field_ptr(IrAnalyze *ira, IrInstru
bool ptr_is_const = true;
bool ptr_is_volatile = false;
return ir_analyze_const_ptr(ira, &field_ptr_instruction->base, len_val,
usize, ConstPtrSpecialNone, ptr_is_const, ptr_is_volatile);
usize, false, ptr_is_const, ptr_is_volatile);
} else {
ir_add_error_node(ira, source_node,
buf_sprintf("no member named '%s' in '%s'", buf_ptr(field_name),
@ -9116,7 +9172,7 @@ static TypeTableEntry *ir_analyze_instruction_field_ptr(IrAnalyze *ira, IrInstru
bool ptr_is_const = true;
bool ptr_is_volatile = false;
return ir_analyze_const_ptr(ira, &field_ptr_instruction->base, len_val,
usize, ConstPtrSpecialNone, ptr_is_const, ptr_is_volatile);
usize, false, ptr_is_const, ptr_is_volatile);
} else {
ir_add_error_node(ira, source_node,
buf_sprintf("no member named '%s' in '%s'", buf_ptr(field_name),
@ -9155,14 +9211,14 @@ static TypeTableEntry *ir_analyze_instruction_field_ptr(IrAnalyze *ira, IrInstru
bool ptr_is_volatile = false;
return ir_analyze_const_ptr(ira, &field_ptr_instruction->base,
create_const_enum_tag(child_type, field->value), child_type,
ConstPtrSpecialNone, ptr_is_const, ptr_is_volatile);
false, ptr_is_const, ptr_is_volatile);
} else {
bool ptr_is_const = true;
bool ptr_is_volatile = false;
return ir_analyze_const_ptr(ira, &field_ptr_instruction->base,
create_const_unsigned_negative(child_type->data.enumeration.tag_type, field->value, false),
child_type->data.enumeration.tag_type,
ConstPtrSpecialNone, ptr_is_const, ptr_is_volatile);
false, ptr_is_const, ptr_is_volatile);
}
}
}
@ -9187,7 +9243,7 @@ static TypeTableEntry *ir_analyze_instruction_field_ptr(IrAnalyze *ira, IrInstru
bool ptr_is_const = true;
bool ptr_is_volatile = false;
return ir_analyze_const_ptr(ira, &field_ptr_instruction->base, const_val,
child_type, ConstPtrSpecialNone, ptr_is_const, ptr_is_volatile);
child_type, false, ptr_is_const, ptr_is_volatile);
}
ir_add_error(ira, &field_ptr_instruction->base,
@ -9201,14 +9257,14 @@ static TypeTableEntry *ir_analyze_instruction_field_ptr(IrAnalyze *ira, IrInstru
create_const_unsigned_negative(ira->codegen->builtin_types.entry_num_lit_int,
child_type->data.integral.bit_count, false),
ira->codegen->builtin_types.entry_num_lit_int,
ConstPtrSpecialNone, ptr_is_const, ptr_is_volatile);
false, ptr_is_const, ptr_is_volatile);
} else if (buf_eql_str(field_name, "is_signed")) {
bool ptr_is_const = true;
bool ptr_is_volatile = false;
return ir_analyze_const_ptr(ira, &field_ptr_instruction->base,
create_const_bool(ira->codegen, child_type->data.integral.is_signed),
ira->codegen->builtin_types.entry_bool,
ConstPtrSpecialNone, ptr_is_const, ptr_is_volatile);
false, ptr_is_const, ptr_is_volatile);
} else {
ir_add_error(ira, &field_ptr_instruction->base,
buf_sprintf("type '%s' has no member called '%s'",
@ -9295,16 +9351,16 @@ static TypeTableEntry *ir_analyze_instruction_store_ptr(IrAnalyze *ira, IrInstru
if (casted_value == ira->codegen->invalid_instruction)
return ira->codegen->builtin_types.entry_invalid;
if (ptr->value.special != ConstValSpecialRuntime && ptr->value.data.x_ptr.special != ConstPtrSpecialRuntime) {
bool is_inline = (ptr->value.data.x_ptr.special == ConstPtrSpecialInline);
if (casted_value->value.special != ConstValSpecialRuntime) {
ConstExprValue *dest_val = const_ptr_pointee(&ptr->value);
if (dest_val->special != ConstValSpecialRuntime) {
*dest_val = casted_value->value;
return ir_analyze_void(ira, &store_ptr_instruction->base);
if (instr_is_comptime(ptr) && ptr->value.data.x_ptr.special != ConstPtrSpecialHardCodedAddr) {
bool comptime_var_mem = ptr->value.data.x_ptr.comptime_var_mem;
if (comptime_var_mem) {
if (instr_is_comptime(casted_value)) {
ConstExprValue *dest_val = const_ptr_pointee(&ptr->value);
if (dest_val->special != ConstValSpecialRuntime) {
*dest_val = casted_value->value;
return ir_analyze_void(ira, &store_ptr_instruction->base);
}
}
}
if (is_inline) {
ir_add_error(ira, &store_ptr_instruction->base,
buf_sprintf("cannot store runtime value in compile time variable"));
return ira->codegen->builtin_types.entry_invalid;
@ -9906,14 +9962,15 @@ static TypeTableEntry *ir_analyze_instruction_unwrap_maybe(IrAnalyze *ira,
return ira->codegen->builtin_types.entry_invalid;
}
TypeTableEntry *child_type = type_entry->data.maybe.child_type;
TypeTableEntry *result_type = get_pointer_to_type(ira->codegen, child_type, false);
TypeTableEntry *result_type = get_pointer_to_type_volatile(ira->codegen, child_type,
ptr_type->data.pointer.is_const, ptr_type->data.pointer.is_volatile);
if (instr_is_comptime(value)) {
ConstExprValue *val = ir_resolve_const(ira, value, UndefBad);
if (!val)
return ira->codegen->builtin_types.entry_invalid;
ConstExprValue *maybe_val = val->data.x_ptr.base_ptr;
assert(val->data.x_ptr.index == SIZE_MAX);
assert(val->data.x_ptr.special == ConstPtrSpecialRef);
ConstExprValue *maybe_val = val->data.x_ptr.data.ref.pointee;
if (maybe_val->special != ConstValSpecialRuntime) {
if (!maybe_val->data.x_maybe) {
@ -9921,8 +9978,8 @@ static TypeTableEntry *ir_analyze_instruction_unwrap_maybe(IrAnalyze *ira,
return ira->codegen->builtin_types.entry_invalid;
}
ConstExprValue *out_val = ir_build_const_from(ira, &unwrap_maybe_instruction->base);
out_val->data.x_ptr.base_ptr = maybe_val->data.x_maybe;
out_val->data.x_ptr.index = SIZE_MAX;
out_val->data.x_ptr.special = ConstPtrSpecialRef;
out_val->data.x_ptr.data.ref.pointee = maybe_val->data.x_maybe;
return result_type;
}
}
@ -10215,9 +10272,10 @@ static TypeTableEntry *ir_analyze_instruction_switch_var(IrAnalyze *ira, IrInstr
ConstExprValue *pointee_val = const_ptr_pointee(target_val_ptr);
if (pointee_val->type->id == TypeTableEntryIdEnum) {
ConstExprValue *out_val = ir_build_const_from(ira, &instruction->base);
out_val->data.x_ptr.base_ptr = pointee_val->data.x_enum.payload;
out_val->data.x_ptr.index = SIZE_MAX;
return get_pointer_to_type(ira->codegen, pointee_val->type, target_value_ptr->value.type->data.pointer.is_const);
out_val->data.x_ptr.special = ConstPtrSpecialRef;
out_val->data.x_ptr.data.ref.pointee = pointee_val->data.x_enum.payload;
return get_pointer_to_type(ira->codegen, pointee_val->type,
target_value_ptr->value.type->data.pointer.is_const);
} else {
zig_panic("TODO comptime switch var");
}
@ -10501,7 +10559,6 @@ static TypeTableEntry *ir_analyze_instruction_container_init_list(IrAnalyze *ira
const_val.special = ConstValSpecialStatic;
const_val.type = fixed_size_array_type;
const_val.data.x_array.elements = allocate<ConstExprValue>(elem_count);
const_val.data.x_array.size = elem_count;
bool is_comptime = ir_should_inline(ira->new_irb.exec, instruction->base.scope);
@ -10540,8 +10597,9 @@ static TypeTableEntry *ir_analyze_instruction_container_init_list(IrAnalyze *ira
for (size_t i = 0; i < elem_count; i += 1) {
ConstExprValue *elem_val = &out_val->data.x_array.elements[i];
if (elem_val->type->id == TypeTableEntryIdArray) {
elem_val->data.x_array.parent_array = out_val;
elem_val->data.x_array.parent_array_index = i;
elem_val->data.x_array.parent.id = ConstParentIdArray;
elem_val->data.x_array.parent.data.p_array.array_val = out_val;
elem_val->data.x_array.parent.data.p_array.elem_index = i;
}
}
return fixed_size_array_type;
@ -11227,22 +11285,34 @@ static TypeTableEntry *ir_analyze_instruction_memset(IrAnalyze *ira, IrInstructi
if (casted_dest_ptr->value.special == ConstValSpecialStatic &&
casted_byte->value.special == ConstValSpecialStatic &&
casted_count->value.special == ConstValSpecialStatic)
casted_count->value.special == ConstValSpecialStatic &&
casted_dest_ptr->value.data.x_ptr.special != ConstPtrSpecialHardCodedAddr)
{
ConstExprValue *dest_ptr_val = &casted_dest_ptr->value;
ConstExprValue *dest_elements;
size_t start;
size_t bound_end;
if (dest_ptr_val->data.x_ptr.index == SIZE_MAX) {
dest_elements = dest_ptr_val->data.x_ptr.base_ptr;
start = 0;
bound_end = 1;
} else {
ConstExprValue *array_val = dest_ptr_val->data.x_ptr.base_ptr;
dest_elements = array_val->data.x_array.elements;
start = dest_ptr_val->data.x_ptr.index;
bound_end = array_val->data.x_array.size;
switch (dest_ptr_val->data.x_ptr.special) {
case ConstPtrSpecialInvalid:
zig_unreachable();
case ConstPtrSpecialRef:
dest_elements = dest_ptr_val->data.x_ptr.data.ref.pointee;
start = 0;
bound_end = 1;
break;
case ConstPtrSpecialBaseArray:
{
ConstExprValue *array_val = dest_ptr_val->data.x_ptr.data.base_array.array_val;
dest_elements = array_val->data.x_array.elements;
start = dest_ptr_val->data.x_ptr.data.base_array.elem_index;
bound_end = array_val->type->data.array.len;
break;
}
case ConstPtrSpecialBaseStruct:
zig_panic("TODO memset on const inner struct");
case ConstPtrSpecialHardCodedAddr:
zig_unreachable();
}
size_t count = casted_count->value.data.x_bignum.data.x_uint;
@ -11304,7 +11374,8 @@ static TypeTableEntry *ir_analyze_instruction_memcpy(IrAnalyze *ira, IrInstructi
if (casted_dest_ptr->value.special == ConstValSpecialStatic &&
casted_src_ptr->value.special == ConstValSpecialStatic &&
casted_count->value.special == ConstValSpecialStatic)
casted_count->value.special == ConstValSpecialStatic &&
casted_dest_ptr->value.data.x_ptr.special != ConstPtrSpecialHardCodedAddr)
{
size_t count = casted_count->value.data.x_bignum.data.x_uint;
@ -11312,15 +11383,26 @@ static TypeTableEntry *ir_analyze_instruction_memcpy(IrAnalyze *ira, IrInstructi
ConstExprValue *dest_elements;
size_t dest_start;
size_t dest_end;
if (dest_ptr_val->data.x_ptr.index == SIZE_MAX) {
dest_elements = dest_ptr_val->data.x_ptr.base_ptr;
dest_start = 0;
dest_end = 1;
} else {
ConstExprValue *array_val = dest_ptr_val->data.x_ptr.base_ptr;
dest_elements = array_val->data.x_array.elements;
dest_start = dest_ptr_val->data.x_ptr.index;
dest_end = array_val->data.x_array.size;
switch (dest_ptr_val->data.x_ptr.special) {
case ConstPtrSpecialInvalid:
zig_unreachable();
case ConstPtrSpecialRef:
dest_elements = dest_ptr_val->data.x_ptr.data.ref.pointee;
dest_start = 0;
dest_end = 1;
break;
case ConstPtrSpecialBaseArray:
{
ConstExprValue *array_val = dest_ptr_val->data.x_ptr.data.base_array.array_val;
dest_elements = array_val->data.x_array.elements;
dest_start = dest_ptr_val->data.x_ptr.data.base_array.elem_index;
dest_end = array_val->type->data.array.len;
break;
}
case ConstPtrSpecialBaseStruct:
zig_panic("TODO memcpy on const inner struct");
case ConstPtrSpecialHardCodedAddr:
zig_unreachable();
}
if (dest_start + count > dest_end) {
@ -11332,15 +11414,27 @@ static TypeTableEntry *ir_analyze_instruction_memcpy(IrAnalyze *ira, IrInstructi
ConstExprValue *src_elements;
size_t src_start;
size_t src_end;
if (src_ptr_val->data.x_ptr.index == SIZE_MAX) {
src_elements = src_ptr_val->data.x_ptr.base_ptr;
src_start = 0;
src_end = 1;
} else {
ConstExprValue *array_val = src_ptr_val->data.x_ptr.base_ptr;
src_elements = array_val->data.x_array.elements;
src_start = src_ptr_val->data.x_ptr.index;
src_end = array_val->data.x_array.size;
switch (src_ptr_val->data.x_ptr.special) {
case ConstPtrSpecialInvalid:
zig_unreachable();
case ConstPtrSpecialRef:
src_elements = src_ptr_val->data.x_ptr.data.ref.pointee;
src_start = 0;
src_end = 1;
break;
case ConstPtrSpecialBaseArray:
{
ConstExprValue *array_val = src_ptr_val->data.x_ptr.data.base_array.array_val;
src_elements = array_val->data.x_array.elements;
src_start = src_ptr_val->data.x_ptr.data.base_array.elem_index;
src_end = array_val->type->data.array.len;
break;
}
case ConstPtrSpecialBaseStruct:
zig_panic("TODO memcpy on const inner struct");
case ConstPtrSpecialHardCodedAddr:
zig_unreachable();
}
if (src_start + count > src_end) {
@ -11415,68 +11509,115 @@ static TypeTableEntry *ir_analyze_instruction_slice(IrAnalyze *ira, IrInstructio
casted_start->value.special == ConstValSpecialStatic &&
(!end || end->value.special == ConstValSpecialStatic))
{
ConstExprValue *base_ptr;
ConstExprValue *array_val;
ConstExprValue *parent_ptr;
size_t abs_offset;
size_t rel_end;
if (array_type->id == TypeTableEntryIdArray) {
base_ptr = &ptr->value;
array_val = &ptr->value;
abs_offset = 0;
rel_end = array_type->data.array.len;
parent_ptr = nullptr;
} else if (array_type->id == TypeTableEntryIdPointer) {
base_ptr = ptr->value.data.x_ptr.base_ptr;
abs_offset = ptr->value.data.x_ptr.index;
if (abs_offset == SIZE_MAX) {
rel_end = 1;
} else {
rel_end = base_ptr->data.x_array.size - abs_offset;
parent_ptr = &ptr->value;
switch (parent_ptr->data.x_ptr.special) {
case ConstPtrSpecialInvalid:
zig_unreachable();
case ConstPtrSpecialRef:
array_val = nullptr;
abs_offset = SIZE_MAX;
rel_end = 1;
break;
case ConstPtrSpecialBaseArray:
array_val = parent_ptr->data.x_ptr.data.base_array.array_val;
abs_offset = parent_ptr->data.x_ptr.data.base_array.elem_index;
rel_end = array_val->type->data.array.len - abs_offset;
break;
case ConstPtrSpecialBaseStruct:
zig_panic("TODO slice const inner struct");
case ConstPtrSpecialHardCodedAddr:
array_val = nullptr;
break;
}
} else if (is_slice(array_type)) {
ConstExprValue *ptr_val = &ptr->value.data.x_struct.fields[slice_ptr_index];
parent_ptr = &ptr->value.data.x_struct.fields[slice_ptr_index];
ConstExprValue *len_val = &ptr->value.data.x_struct.fields[slice_len_index];
base_ptr = ptr_val->data.x_ptr.base_ptr;
abs_offset = ptr_val->data.x_ptr.index;
if (ptr_val->data.x_ptr.index == SIZE_MAX) {
rel_end = 1;
} else {
rel_end = len_val->data.x_bignum.data.x_uint;
switch (parent_ptr->data.x_ptr.special) {
case ConstPtrSpecialInvalid:
zig_unreachable();
case ConstPtrSpecialRef:
array_val = nullptr;
abs_offset = SIZE_MAX;
rel_end = 1;
break;
case ConstPtrSpecialBaseArray:
array_val = parent_ptr->data.x_ptr.data.base_array.array_val;
abs_offset = parent_ptr->data.x_ptr.data.base_array.elem_index;
rel_end = len_val->data.x_bignum.data.x_uint;
break;
case ConstPtrSpecialBaseStruct:
zig_panic("TODO slice const inner struct");
case ConstPtrSpecialHardCodedAddr:
array_val = nullptr;
break;
}
} else {
zig_unreachable();
}
uint64_t start_scalar = casted_start->value.data.x_bignum.data.x_uint;
if (start_scalar > rel_end) {
ir_add_error(ira, &instruction->base, buf_sprintf("out of bounds slice"));
return ira->codegen->builtin_types.entry_invalid;
if (array_val || parent_ptr->data.x_ptr.special != ConstPtrSpecialHardCodedAddr) {
uint64_t start_scalar = casted_start->value.data.x_bignum.data.x_uint;
if (start_scalar > rel_end) {
ir_add_error(ira, &instruction->base, buf_sprintf("out of bounds slice"));
return ira->codegen->builtin_types.entry_invalid;
}
uint64_t end_scalar;
if (end) {
end_scalar = end->value.data.x_bignum.data.x_uint;
} else {
end_scalar = rel_end;
}
if (end_scalar > rel_end) {
ir_add_error(ira, &instruction->base, buf_sprintf("out of bounds slice"));
return ira->codegen->builtin_types.entry_invalid;
}
if (start_scalar > end_scalar) {
ir_add_error(ira, &instruction->base, buf_sprintf("slice start is greater than end"));
return ira->codegen->builtin_types.entry_invalid;
}
ConstExprValue *out_val = ir_build_const_from(ira, &instruction->base);
out_val->data.x_struct.fields = allocate<ConstExprValue>(2);
ConstExprValue *ptr_val = &out_val->data.x_struct.fields[slice_ptr_index];
if (array_val) {
size_t index = abs_offset + start_scalar;
init_const_ptr_array(ira->codegen, ptr_val, array_val, index, instruction->is_const);
} else {
switch (parent_ptr->data.x_ptr.special) {
case ConstPtrSpecialInvalid:
zig_unreachable();
case ConstPtrSpecialRef:
init_const_ptr_ref(ira->codegen, ptr_val,
parent_ptr->data.x_ptr.data.ref.pointee, instruction->is_const);
break;
case ConstPtrSpecialBaseArray:
zig_unreachable();
case ConstPtrSpecialBaseStruct:
zig_panic("TODO");
case ConstPtrSpecialHardCodedAddr:
zig_unreachable();
}
}
ConstExprValue *len_val = &out_val->data.x_struct.fields[slice_len_index];
init_const_usize(ira->codegen, len_val, end_scalar - start_scalar);
return return_type;
}
uint64_t end_scalar;
if (end) {
end_scalar = end->value.data.x_bignum.data.x_uint;
} else {
end_scalar = rel_end;
}
if (end_scalar > rel_end) {
ir_add_error(ira, &instruction->base, buf_sprintf("out of bounds slice"));
return ira->codegen->builtin_types.entry_invalid;
}
if (start_scalar > end_scalar) {
ir_add_error(ira, &instruction->base, buf_sprintf("slice start is greater than end"));
return ira->codegen->builtin_types.entry_invalid;
}
ConstExprValue *out_val = ir_build_const_from(ira, &instruction->base);
out_val->data.x_struct.fields = allocate<ConstExprValue>(2);
ConstExprValue *ptr_val = &out_val->data.x_struct.fields[slice_ptr_index];
size_t index = (abs_offset != SIZE_MAX) ? (abs_offset + start_scalar) : SIZE_MAX;
init_const_ptr(ira->codegen, ptr_val, base_ptr, index, instruction->is_const);
ConstExprValue *len_val = &out_val->data.x_struct.fields[slice_len_index];
init_const_usize(ira->codegen, len_val, end_scalar - start_scalar);
return return_type;
}
IrInstruction *new_instruction = ir_build_slice_from(&ira->new_irb, &instruction->base, ptr,
@ -11688,8 +11829,7 @@ static TypeTableEntry *ir_analyze_instruction_unwrap_err_code(IrAnalyze *ira,
ConstExprValue *ptr_val = ir_resolve_const(ira, value, UndefBad);
if (!ptr_val)
return ira->codegen->builtin_types.entry_invalid;
ConstExprValue *err_union_val = ptr_val->data.x_ptr.base_ptr;
assert(ptr_val->data.x_ptr.index == SIZE_MAX);
ConstExprValue *err_union_val = const_ptr_pointee(ptr_val);
if (err_union_val->special != ConstValSpecialRuntime) {
ErrorTableEntry *err = err_union_val->data.x_err_union.err;
assert(err);
@ -11728,13 +11868,13 @@ static TypeTableEntry *ir_analyze_instruction_unwrap_err_payload(IrAnalyze *ira,
return ira->codegen->builtin_types.entry_invalid;
} else if (canon_type->id == TypeTableEntryIdErrorUnion) {
TypeTableEntry *child_type = canon_type->data.error.child_type;
TypeTableEntry *result_type = get_pointer_to_type(ira->codegen, child_type, false);
TypeTableEntry *result_type = get_pointer_to_type_volatile(ira->codegen, child_type,
ptr_type->data.pointer.is_const, ptr_type->data.pointer.is_volatile);
if (instr_is_comptime(value)) {
ConstExprValue *ptr_val = ir_resolve_const(ira, value, UndefBad);
if (!ptr_val)
return ira->codegen->builtin_types.entry_invalid;
ConstExprValue *err_union_val = ptr_val->data.x_ptr.base_ptr;
assert(ptr_val->data.x_ptr.index == SIZE_MAX);
ConstExprValue *err_union_val = const_ptr_pointee(ptr_val);
if (err_union_val->special != ConstValSpecialRuntime) {
ErrorTableEntry *err = err_union_val->data.x_err_union.err;
if (err != nullptr) {
@ -11744,8 +11884,8 @@ static TypeTableEntry *ir_analyze_instruction_unwrap_err_payload(IrAnalyze *ira,
}
ConstExprValue *out_val = ir_build_const_from(ira, &instruction->base);
out_val->data.x_ptr.base_ptr = err_union_val->data.x_err_union.payload;
out_val->data.x_ptr.index = SIZE_MAX;
out_val->data.x_ptr.special = ConstPtrSpecialRef;
out_val->data.x_ptr.data.ref.pointee = err_union_val->data.x_err_union.payload;
return result_type;
}
}

20
test/cases/eval.zig
View File

@ -263,3 +263,23 @@ fn fnWithSetDebugSafety() -> i32{
@setDebugSafety(this, true);
return 1234;
}
const SimpleStruct = struct {
field: i32,
fn method(self: &const SimpleStruct) -> i32 {
return self.field + 3;
}
};
var simple_struct = SimpleStruct{ .field = 1234, };
const bound_fn = simple_struct.method;
fn callMethodOnBoundFnReferringToVarInstance() {
@setFnTest(this);
assert(bound_fn() == 1237);
}