Commit bd4280decf
src-self-hosted/ir.zig
@@ -1,2590 +1,250 @@
const std = @import("std");
-const Compilation = @import("compilation.zig").Compilation;
-const Scope = @import("scope.zig").Scope;
-const ast = std.zig.ast;
+const mem = std.mem;
const Allocator = std.mem.Allocator;
const Value = @import("value.zig").Value;
-const Type = Value.Type;
const assert = std.debug.assert;
-const Token = std.zig.Token;
-const Span = @import("errmsg.zig").Span;
-const llvm = @import("llvm.zig");
-const codegen = @import("codegen.zig");
-const ObjectFile = codegen.ObjectFile;
-const Decl = @import("decl.zig").Decl;
-const mem = std.mem;
-
-pub const LVal = enum {
- None,
- Ptr,
-};
-
-pub const IrVal = union(enum) {
- Unknown,
- KnownType: *Type,
- KnownValue: *Value,
-
- const Init = enum {
- Unknown,
- NoReturn,
- Void,
- };
-
- pub fn dump(self: IrVal) void {
- switch (self) {
- .Unknown => std.debug.warn("Unknown", .{}),
- .KnownType => |typ| {
- std.debug.warn("KnownType(", .{});
- typ.dump();
- std.debug.warn(")", .{});
- },
- .KnownValue => |value| {
- std.debug.warn("KnownValue(", .{});
- value.dump();
- std.debug.warn(")", .{});
- },
- }
- }
-};
pub const Inst = struct {
- id: Id,
- scope: *Scope,
- debug_id: usize,
- val: IrVal,
- ref_count: usize,
- span: Span,
- owner_bb: *BasicBlock,
-
- /// true if this instruction was generated by zig and not from user code
- is_generated: bool,
-
- /// the instruction that is derived from this one in analysis
- child: ?*Inst,
-
- /// the instruction that this one derives from in analysis
- parent: ?*Inst,
-
- /// populated durign codegen
- llvm_value: ?*llvm.Value,
-
- pub fn cast(base: *Inst, comptime T: type) ?*T {
- if (base.id == comptime typeToId(T)) {
- return @fieldParentPtr(T, "base", base);
- }
- return null;
- }
-
- pub fn typeToId(comptime T: type) Id {
- inline for (@typeInfo(Id).Enum.fields) |f| {
- if (T == @field(Inst, f.name)) {
- return @field(Id, f.name);
- }
- }
- unreachable;
- }
-
- pub fn dump(base: *const Inst) void {
- inline for (@typeInfo(Id).Enum.fields) |f| {
- if (base.id == @field(Id, f.name)) {
- const T = @field(Inst, f.name);
- std.debug.warn("#{} = {}(", .{ base.debug_id, @tagName(base.id) });
- @fieldParentPtr(T, "base", base).dump();
- std.debug.warn(")", .{});
- return;
- }
- }
- unreachable;
- }
-
- pub fn hasSideEffects(base: *const Inst) bool {
- inline for (@typeInfo(Id).Enum.fields) |f| {
- if (base.id == @field(Id, f.name)) {
- const T = @field(Inst, f.name);
- return @fieldParentPtr(T, "base", base).hasSideEffects();
- }
- }
- unreachable;
- }
-
- pub fn analyze(base: *Inst, ira: *Analyze) Analyze.Error!*Inst {
- switch (base.id) {
- .Return => return @fieldParentPtr(Return, "base", base).analyze(ira),
- .Const => return @fieldParentPtr(Const, "base", base).analyze(ira),
- .Call => return @fieldParentPtr(Call, "base", base).analyze(ira),
- .DeclRef => return @fieldParentPtr(DeclRef, "base", base).analyze(ira),
- .Ref => return @fieldParentPtr(Ref, "base", base).analyze(ira),
- .DeclVar => return @fieldParentPtr(DeclVar, "base", base).analyze(ira),
- .CheckVoidStmt => return @fieldParentPtr(CheckVoidStmt, "base", base).analyze(ira),
- .Phi => return @fieldParentPtr(Phi, "base", base).analyze(ira),
- .Br => return @fieldParentPtr(Br, "base", base).analyze(ira),
- .AddImplicitReturnType => return @fieldParentPtr(AddImplicitReturnType, "base", base).analyze(ira),
- .PtrType => return @fieldParentPtr(PtrType, "base", base).analyze(ira),
- .VarPtr => return @fieldParentPtr(VarPtr, "base", base).analyze(ira),
- .LoadPtr => return @fieldParentPtr(LoadPtr, "base", base).analyze(ira),
- }
- }
-
- pub fn render(base: *Inst, ofile: *ObjectFile, fn_val: *Value.Fn) (error{OutOfMemory}!?*llvm.Value) {
- switch (base.id) {
- .Return => return @fieldParentPtr(Return, "base", base).render(ofile, fn_val),
- .Const => return @fieldParentPtr(Const, "base", base).render(ofile, fn_val),
- .Call => return @fieldParentPtr(Call, "base", base).render(ofile, fn_val),
- .VarPtr => return @fieldParentPtr(VarPtr, "base", base).render(ofile, fn_val),
- .LoadPtr => return @fieldParentPtr(LoadPtr, "base", base).render(ofile, fn_val),
- .DeclRef => unreachable,
- .PtrType => unreachable,
- .Ref => @panic("TODO"),
- .DeclVar => @panic("TODO"),
- .CheckVoidStmt => @panic("TODO"),
- .Phi => @panic("TODO"),
- .Br => @panic("TODO"),
- .AddImplicitReturnType => @panic("TODO"),
- }
- }
-
- fn ref(base: *Inst, builder: *Builder) void {
- base.ref_count += 1;
- if (base.owner_bb != builder.current_basic_block and !base.isCompTime()) {
- base.owner_bb.ref(builder);
- }
- }
-
- fn copyVal(base: *Inst, comp: *Compilation) !*Value {
- if (base.parent.?.ref_count == 0) {
- return base.val.KnownValue.derefAndCopy(comp);
- }
- return base.val.KnownValue.copy(comp);
- }
-
- fn getAsParam(param: *Inst) !*Inst {
- param.ref_count -= 1;
- const child = param.child orelse return error.SemanticAnalysisFailed;
- switch (child.val) {
- .Unknown => return error.SemanticAnalysisFailed,
- else => return child,
- }
- }
-
- fn getConstVal(self: *Inst, ira: *Analyze) !*Value {
- if (self.isCompTime()) {
- return self.val.KnownValue;
- } else {
- try ira.addCompileError(self.span, "unable to evaluate constant expression", .{});
- return error.SemanticAnalysisFailed;
- }
- }
-
- fn getAsConstType(param: *Inst, ira: *Analyze) !*Type {
- const meta_type = Type.MetaType.get(ira.irb.comp);
- meta_type.base.base.deref(ira.irb.comp);
-
- const inst = try param.getAsParam();
- const casted = try ira.implicitCast(inst, &meta_type.base);
- const val = try casted.getConstVal(ira);
- return val.cast(Value.Type).?;
- }
-
- fn getAsConstAlign(param: *Inst, ira: *Analyze) !u32 {
- return error.Unimplemented;
- //const align_type = Type.Int.get_align(ira.irb.comp);
- //align_type.base.base.deref(ira.irb.comp);
-
- //const inst = try param.getAsParam();
- //const casted = try ira.implicitCast(inst, align_type);
- //const val = try casted.getConstVal(ira);
-
- //uint32_t align_bytes = bigint_as_unsigned(&const_val->data.x_bigint);
- //if (align_bytes == 0) {
- // ir_add_error(ira, value, buf_sprintf("alignment must be >= 1"));
- // return false;
- //}
-
- //if (!is_power_of_2(align_bytes)) {
- // ir_add_error(ira, value, buf_sprintf("alignment value %" PRIu32 " is not a power of 2", align_bytes));
- // return false;
- //}
- }
-
- /// asserts that the type is known
- fn getKnownType(self: *Inst) *Type {
- switch (self.val) {
- .KnownType => |typ| return typ,
- .KnownValue => |value| return value.typ,
- .Unknown => unreachable,
- }
- }
-
- pub fn setGenerated(base: *Inst) void {
- base.is_generated = true;
- }
-
- pub fn isNoReturn(base: *const Inst) bool {
- switch (base.val) {
- .Unknown => return false,
- .KnownValue => |x| return x.typ.id == .NoReturn,
- .KnownType => |typ| return typ.id == .NoReturn,
- }
- }
-
- pub fn isCompTime(base: *const Inst) bool {
- return base.val == .KnownValue;
- }
-
- pub fn linkToParent(self: *Inst, parent: *Inst) void {
- assert(self.parent == null);
- assert(parent.child == null);
- self.parent = parent;
- parent.child = self;
- }
-
- pub const Id = enum {
- Return,
- Const,
- Ref,
- DeclVar,
- CheckVoidStmt,
- Phi,
- Br,
- AddImplicitReturnType,
- Call,
- DeclRef,
- PtrType,
- VarPtr,
- LoadPtr,
- };
-
- pub const Call = struct {
- base: Inst,
- params: Params,
-
- const Params = struct {
- fn_ref: *Inst,
- args: []*Inst,
- };
-
- const ir_val_init = IrVal.Init.Unknown;
-
- pub fn dump(self: *const Call) void {
- std.debug.warn("#{}(", .{self.params.fn_ref.debug_id});
- for (self.params.args) |arg| {
- std.debug.warn("#{},", .{arg.debug_id});
- }
- std.debug.warn(")", .{});
- }
-
- pub fn hasSideEffects(self: *const Call) bool {
- return true;
- }
-
- pub fn analyze(self: *const Call, ira: *Analyze) !*Inst {
- const fn_ref = try self.params.fn_ref.getAsParam();
- const fn_ref_type = fn_ref.getKnownType();
- const fn_type = fn_ref_type.cast(Type.Fn) orelse {
- try ira.addCompileError(fn_ref.span, "type '{}' not a function", .{fn_ref_type.name});
- return error.SemanticAnalysisFailed;
- };
-
- const fn_type_param_count = fn_type.paramCount();
-
- if (fn_type_param_count != self.params.args.len) {
- try ira.addCompileError(self.base.span, "expected {} arguments, found {}", .{
- fn_type_param_count,
- self.params.args.len,
- });
- return error.SemanticAnalysisFailed;
- }
-
- const args = try ira.irb.arena().alloc(*Inst, self.params.args.len);
- for (self.params.args) |arg, i| {
- args[i] = try arg.getAsParam();
- }
- const new_inst = try ira.irb.build(Call, self.base.scope, self.base.span, Params{
- .fn_ref = fn_ref,
- .args = args,
- });
- new_inst.val = IrVal{ .KnownType = fn_type.key.data.Normal.return_type };
- return new_inst;
- }
-
- pub fn render(self: *Call, ofile: *ObjectFile, fn_val: *Value.Fn) !?*llvm.Value {
- const fn_ref = self.params.fn_ref.llvm_value.?;
-
- const args = try ofile.arena.alloc(*llvm.Value, self.params.args.len);
- for (self.params.args) |arg, i| {
- args[i] = arg.llvm_value.?;
- }
-
- const llvm_cc = llvm.CCallConv;
- const call_attr = llvm.CallAttr.Auto;
-
- return llvm.BuildCall(
- ofile.builder,
- fn_ref,
- args.ptr,
- @intCast(c_uint, args.len),
- llvm_cc,
- call_attr,
- "",
- ) orelse error.OutOfMemory;
- }
- };
-
- pub const Const = struct {
- base: Inst,
- params: Params,
-
- const Params = struct {};
-
- // Use Builder.buildConst* methods, or, after building a Const instruction,
- // manually set the ir_val field.
- const ir_val_init = IrVal.Init.Unknown;
-
- pub fn dump(self: *const Const) void {
- self.base.val.KnownValue.dump();
- }
-
- pub fn hasSideEffects(self: *const Const) bool {
- return false;
- }
-
- pub fn analyze(self: *const Const, ira: *Analyze) !*Inst {
- const new_inst = try ira.irb.build(Const, self.base.scope, self.base.span, Params{});
- new_inst.val = IrVal{ .KnownValue = self.base.val.KnownValue.getRef() };
- return new_inst;
- }
-
- pub fn render(self: *Const, ofile: *ObjectFile, fn_val: *Value.Fn) !?*llvm.Value {
- return self.base.val.KnownValue.getLlvmConst(ofile);
- }
+ tag: Tag,
+
+ pub const all_types = .{
+ Constant,
+ PtrToInt,
+ FieldPtr,
+ Deref,
+ Assembly,
+ Unreach,
+ };
+
+ pub const Tag = enum {
+ constant,
+ ptrtoint,
+ fieldptr,
+ deref,
+ @"asm",
+ unreach,
+ };
+
+ /// This struct owns the `Value` memory. When the struct is deallocated,
+ /// so is the `Value`. The value of a constant must be copied into
+ /// a memory location for the value to survive after a const instruction.
+ pub const Constant = struct {
+ base: Inst = Inst{ .tag = .constant },
+ value: *Value,
};
- pub const Return = struct {
- base: Inst,
- params: Params,
-
- const Params = struct {
- return_value: *Inst,
- };
-
- const ir_val_init = IrVal.Init.NoReturn;
-
- pub fn dump(self: *const Return) void {
- std.debug.warn("#{}", .{self.params.return_value.debug_id});
- }
-
- pub fn hasSideEffects(self: *const Return) bool {
- return true;
- }
-
- pub fn analyze(self: *const Return, ira: *Analyze) !*Inst {
- const value = try self.params.return_value.getAsParam();
- const casted_value = try ira.implicitCast(value, ira.explicit_return_type);
-
- // TODO detect returning local variable address
-
- return ira.irb.build(Return, self.base.scope, self.base.span, Params{ .return_value = casted_value });
- }
-
- pub fn render(self: *Return, ofile: *ObjectFile, fn_val: *Value.Fn) !?*llvm.Value {
- const value = self.params.return_value.llvm_value;
- const return_type = self.params.return_value.getKnownType();
-
- if (return_type.handleIsPtr()) {
- @panic("TODO");
- } else {
- _ = llvm.BuildRet(ofile.builder, value) orelse return error.OutOfMemory;
- }
- return null;
- }
+ pub const PtrToInt = struct {
+ base: Inst = Inst{ .tag = .ptrtoint },
};
- pub const Ref = struct {
- base: Inst,
- params: Params,
-
- const Params = struct {
- target: *Inst,
- mut: Type.Pointer.Mut,
- volatility: Type.Pointer.Vol,
- };
-
- const ir_val_init = IrVal.Init.Unknown;
-
- pub fn dump(inst: *const Ref) void {}
-
- pub fn hasSideEffects(inst: *const Ref) bool {
- return false;
- }
-
- pub fn analyze(self: *const Ref, ira: *Analyze) !*Inst {
- const target = try self.params.target.getAsParam();
-
- if (ira.getCompTimeValOrNullUndefOk(target)) |val| {
- return ira.getCompTimeRef(
- val,
- Value.Ptr.Mut.CompTimeConst,
- self.params.mut,
- self.params.volatility,
- );
- }
-
- const new_inst = try ira.irb.build(Ref, self.base.scope, self.base.span, Params{
- .target = target,
- .mut = self.params.mut,
- .volatility = self.params.volatility,
- });
- const elem_type = target.getKnownType();
- const ptr_type = try Type.Pointer.get(ira.irb.comp, Type.Pointer.Key{
- .child_type = elem_type,
- .mut = self.params.mut,
- .vol = self.params.volatility,
- .size = .One,
- .alignment = .Abi,
- });
- // TODO: potentially set the hint that this is a stack pointer. But it might not be - this
- // could be a ref of a global, for example
- new_inst.val = IrVal{ .KnownType = &ptr_type.base };
- // TODO potentially add an alloca entry here
- return new_inst;
- }
+ pub const FieldPtr = struct {
+ base: Inst = Inst{ .tag = .fieldptr },
};
- pub const DeclRef = struct {
- base: Inst,
- params: Params,
-
- const Params = struct {
- decl: *Decl,
- lval: LVal,
- };
-
- const ir_val_init = IrVal.Init.Unknown;
-
- pub fn dump(inst: *const DeclRef) void {}
-
- pub fn hasSideEffects(inst: *const DeclRef) bool {
- return false;
- }
-
- pub fn analyze(self: *const DeclRef, ira: *Analyze) !*Inst {
- (ira.irb.comp.resolveDecl(self.params.decl)) catch |err| switch (err) {
- error.OutOfMemory => return error.OutOfMemory,
- else => return error.SemanticAnalysisFailed,
- };
- switch (self.params.decl.id) {
- .CompTime => unreachable,
- .Var => return error.Unimplemented,
- .Fn => {
- const fn_decl = @fieldParentPtr(Decl.Fn, "base", self.params.decl);
- const decl_val = switch (fn_decl.value) {
- .Unresolved => unreachable,
- .Fn => |fn_val| &fn_val.base,
- .FnProto => |fn_proto| &fn_proto.base,
- };
- switch (self.params.lval) {
- .None => {
- return ira.irb.buildConstValue(self.base.scope, self.base.span, decl_val);
- },
- .Ptr => return error.Unimplemented,
- }
- },
- }
- }
+ pub const Deref = struct {
+ base: Inst = Inst{ .tag = .deref },
};
- pub const VarPtr = struct {
- base: Inst,
- params: Params,
-
- const Params = struct {
- var_scope: *Scope.Var,
- };
-
- const ir_val_init = IrVal.Init.Unknown;
-
- pub fn dump(inst: *const VarPtr) void {
- std.debug.warn("{}", .{inst.params.var_scope.name});
- }
-
- pub fn hasSideEffects(inst: *const VarPtr) bool {
- return false;
- }
-
- pub fn analyze(self: *const VarPtr, ira: *Analyze) !*Inst {
- switch (self.params.var_scope.data) {
- .Const => @panic("TODO"),
- .Param => |param| {
- const new_inst = try ira.irb.build(
- Inst.VarPtr,
- self.base.scope,
- self.base.span,
- Inst.VarPtr.Params{ .var_scope = self.params.var_scope },
- );
- const ptr_type = try Type.Pointer.get(ira.irb.comp, Type.Pointer.Key{
- .child_type = param.typ,
- .mut = .Const,
- .vol = .Non,
- .size = .One,
- .alignment = .Abi,
- });
- new_inst.val = IrVal{ .KnownType = &ptr_type.base };
- return new_inst;
- },
- }
- }
-
- pub fn render(self: *VarPtr, ofile: *ObjectFile, fn_val: *Value.Fn) *llvm.Value {
- switch (self.params.var_scope.data) {
- .Const => unreachable, // turned into Inst.Const in analyze pass
- .Param => |param| return param.llvm_value,
- }
- }
+ pub const Assembly = struct {
+ base: Inst = Inst{ .tag = .@"asm" },
};
- pub const LoadPtr = struct {
- base: Inst,
- params: Params,
-
- const Params = struct {
- target: *Inst,
- };
-
- const ir_val_init = IrVal.Init.Unknown;
-
- pub fn dump(inst: *const LoadPtr) void {}
-
- pub fn hasSideEffects(inst: *const LoadPtr) bool {
- return false;
- }
-
- pub fn analyze(self: *const LoadPtr, ira: *Analyze) !*Inst {
- const target = try self.params.target.getAsParam();
- const target_type = target.getKnownType();
- if (target_type.id != .Pointer) {
- try ira.addCompileError(self.base.span, "dereference of non pointer type '{}'", .{target_type.name});
- return error.SemanticAnalysisFailed;
- }
- const ptr_type = @fieldParentPtr(Type.Pointer, "base", target_type);
- // if (instr_is_comptime(ptr)) {
- // if (ptr->value.data.x_ptr.mut == ConstPtrMutComptimeConst ||
- // ptr->value.data.x_ptr.mut == ConstPtrMutComptimeVar)
- // {
- // ConstExprValue *pointee = const_ptr_pointee(ira->codegen, &ptr->value);
- // if (pointee->special != ConstValSpecialRuntime) {
- // IrInstruction *result = ir_create_const(&ira->new_irb, source_instruction->scope,
- // source_instruction->source_node, child_type);
- // copy_const_val(&result->value, pointee, ptr->value.data.x_ptr.mut == ConstPtrMutComptimeConst);
- // result->value.type = child_type;
- // return result;
- // }
- // }
- // }
- const new_inst = try ira.irb.build(
- Inst.LoadPtr,
- self.base.scope,
- self.base.span,
- Inst.LoadPtr.Params{ .target = target },
- );
- new_inst.val = IrVal{ .KnownType = ptr_type.key.child_type };
- return new_inst;
- }
-
- pub fn render(self: *LoadPtr, ofile: *ObjectFile, fn_val: *Value.Fn) !?*llvm.Value {
- const child_type = self.base.getKnownType();
- if (!child_type.hasBits()) {
- return null;
- }
- const ptr = self.params.target.llvm_value.?;
- const ptr_type = self.params.target.getKnownType().cast(Type.Pointer).?;
-
- return try codegen.getHandleValue(ofile, ptr, ptr_type);
-
- //uint32_t unaligned_bit_count = ptr_type->data.pointer.unaligned_bit_count;
- //if (unaligned_bit_count == 0)
- // return get_handle_value(g, ptr, child_type, ptr_type);
-
- //bool big_endian = g->is_big_endian;
-
- //assert(!handle_is_ptr(child_type));
- //LLVMValueRef containing_int = gen_load(g, ptr, ptr_type, "");
-
- //uint32_t bit_offset = ptr_type->data.pointer.bit_offset;
- //uint32_t host_bit_count = LLVMGetIntTypeWidth(LLVMTypeOf(containing_int));
- //uint32_t shift_amt = big_endian ? host_bit_count - bit_offset - unaligned_bit_count : bit_offset;
-
- //LLVMValueRef shift_amt_val = LLVMConstInt(LLVMTypeOf(containing_int), shift_amt, false);
- //LLVMValueRef shifted_value = LLVMBuildLShr(g->builder, containing_int, shift_amt_val, "");
-
- //return LLVMBuildTrunc(g->builder, shifted_value, child_type->type_ref, "");
- }
+ pub const Unreach = struct {
+ base: Inst = Inst{ .tag = .unreach },
};
+};
- pub const PtrType = struct {
- base: Inst,
- params: Params,
-
- const Params = struct {
- child_type: *Inst,
- mut: Type.Pointer.Mut,
- vol: Type.Pointer.Vol,
- size: Type.Pointer.Size,
- alignment: ?*Inst,
- };
-
- const ir_val_init = IrVal.Init.Unknown;
-
- pub fn dump(inst: *const PtrType) void {}
+pub const ErrorMsg = struct {
+ byte_offset: usize,
+ msg: []const u8,
+};
- pub fn hasSideEffects(inst: *const PtrType) bool {
- return false;
- }
+pub const Tree = struct {
+ decls: std.ArrayList(*Inst),
+ errors: std.ArrayList(ErrorMsg),
+};
- pub fn analyze(self: *const PtrType, ira: *Analyze) !*Inst {
- const child_type = try self.params.child_type.getAsConstType(ira);
- // if (child_type->id == TypeTableEntryIdUnreachable) {
- // ir_add_error(ira, &instruction->base, buf_sprintf("pointer to noreturn not allowed"));
- // return ira->codegen->builtin_types.entry_invalid;
- // } else if (child_type->id == TypeTableEntryIdOpaque && instruction->ptr_len == PtrLenUnknown) {
- // ir_add_error(ira, &instruction->base, buf_sprintf("unknown-length pointer to opaque"));
- // return ira->codegen->builtin_types.entry_invalid;
- // }
- const alignment = if (self.params.alignment) |align_inst| blk: {
- const amt = try align_inst.getAsConstAlign(ira);
- break :blk Type.Pointer.Align{ .Override = amt };
- } else blk: {
- break :blk .Abi;
- };
- const ptr_type = try Type.Pointer.get(ira.irb.comp, Type.Pointer.Key{
- .child_type = child_type,
- .mut = self.params.mut,
- .vol = self.params.vol,
- .size = self.params.size,
- .alignment = alignment,
- });
- ptr_type.base.base.deref(ira.irb.comp);
+const ParseContext = struct {
+ allocator: *Allocator,
+ i: usize,
+ source: []const u8,
+ errors: *std.ArrayList(ErrorMsg),
+};
- return ira.irb.buildConstValue(self.base.scope, self.base.span, &ptr_type.base.base);
- }
+pub fn parse(allocator: *Allocator, source: []const u8) Allocator.Error!Tree {
+ var tree: Tree = .{
+ .decls = std.ArrayList(*Inst).init(allocator),
+ .errors = std.ArrayList(ErrorMsg).init(allocator),
};
-
- pub const DeclVar = struct {
- base: Inst,
- params: Params,
-
- const Params = struct {
- variable: *Variable,
- };
-
- const ir_val_init = IrVal.Init.Unknown;
-
- pub fn dump(inst: *const DeclVar) void {}
-
- pub fn hasSideEffects(inst: *const DeclVar) bool {
- return true;
- }
-
- pub fn analyze(self: *const DeclVar, ira: *Analyze) !*Inst {
- return error.Unimplemented; // TODO
- }
+ var ctx: ParseContext = .{
+ .allocator = allocator,
+ .i = 0,
+ .source = source,
+ .errors = &tree.errors,
};
-
- pub const CheckVoidStmt = struct {
- base: Inst,
- params: Params,
-
- const Params = struct {
- target: *Inst,
- };
-
- const ir_val_init = IrVal.Init.Unknown;
-
- pub fn dump(self: *const CheckVoidStmt) void {
- std.debug.warn("#{}", .{self.params.target.debug_id});
- }
-
- pub fn hasSideEffects(inst: *const CheckVoidStmt) bool {
- return true;
- }
-
- pub fn analyze(self: *const CheckVoidStmt, ira: *Analyze) !*Inst {
- const target = try self.params.target.getAsParam();
- if (target.getKnownType().id != .Void) {
- try ira.addCompileError(self.base.span, "expression value is ignored", .{});
- return error.SemanticAnalysisFailed;
- }
- return ira.irb.buildConstVoid(self.base.scope, self.base.span, true);
- }
+ parseRoot(&ctx, &tree) catch |err| switch (err) {
+ error.ParseFailure => {
+ assert(tree.errors.items.len != 0);
+ },
+ else => |e| return e,
};
+ return tree;
+}
- pub const Phi = struct {
- base: Inst,
- params: Params,
-
- const Params = struct {
- incoming_blocks: []*BasicBlock,
- incoming_values: []*Inst,
- };
-
- const ir_val_init = IrVal.Init.Unknown;
-
- pub fn dump(inst: *const Phi) void {}
-
- pub fn hasSideEffects(inst: *const Phi) bool {
- return false;
- }
-
- pub fn analyze(self: *const Phi, ira: *Analyze) !*Inst {
- return error.Unimplemented; // TODO
- }
+pub fn parseRoot(ctx: *ParseContext, tree: *Tree) !void {
+ // The IR format is designed so that it can be tokenized and parsed at the same time.
+ var global_name_map = std.StringHashMap(usize).init(ctx.allocator);
+ while (ctx.i < ctx.source.len) : (ctx.i += 1) switch (ctx.source[ctx.i]) {
+ ';' => _ = try skipToAndOver(ctx, '\n'),
+ '@' => {
+ const at_start = ctx.i;
+ const ident = try skipToAndOver(ctx, ' ');
+ var ty: ?*Value = null;
+ if (eatByte(ctx, ':')) {
+ ty = try parseType(ctx);
+ skipSpace(ctx);
+ }
+ try requireEatBytes(ctx, "= ");
+ const inst = try parseInstruction(ctx);
+ const ident_index = tree.decls.items.len;
+ if (try global_name_map.put(ident, ident_index)) |_| {
+ return parseError(ctx, "redefinition of identifier '{}'", .{ident});
+ }
+ try tree.decls.append(inst);
+ continue;
+ },
+ ' ', '\n' => continue,
+ else => |byte| return parseError(ctx, "unexpected byte: '{c}'", .{byte}),
};
+}
- pub const Br = struct {
- base: Inst,
- params: Params,
-
- const Params = struct {
- dest_block: *BasicBlock,
- is_comptime: *Inst,
- };
+fn eatByte(ctx: *ParseContext, byte: u8) bool {
+ if (ctx.i >= ctx.source.len) return false;
+ if (ctx.source[ctx.i] != byte) return false;
+ ctx.i += 1;
+ return true;
+}
- const ir_val_init = IrVal.Init.NoReturn;
+fn skipSpace(ctx: *ParseContext) void {
+ while (ctx.i < ctx.source.len and ctx.source[ctx.i] == ' ') : (ctx.i += 1) {}
+}
- pub fn dump(inst: *const Br) void {}
+fn requireEatBytes(ctx: *ParseContext, bytes: []const u8) !void {
+ if (ctx.i + bytes.len > ctx.source.len)
+ return parseError(ctx, "unexpected EOF", .{});
+ if (!mem.eql(u8, ctx.source[ctx.i..][0..bytes.len], bytes))
+ return parseError(ctx, "expected '{}'", .{bytes});
+ ctx.i += bytes.len;
+}
- pub fn hasSideEffects(inst: *const Br) bool {
- return true;
+fn skipToAndOver(ctx: *ParseContext, byte: u8) ![]const u8 {
+ const start_i = ctx.i;
+ while (ctx.i < ctx.source.len) : (ctx.i += 1) {
+ if (ctx.source[ctx.i] == byte) {
+ const result = ctx.source[start_i..ctx.i];
+ ctx.i += 1;
+ return result;
}
+ }
+ return parseError(ctx, "unexpected EOF", .{});
+}
- pub fn analyze(self: *const Br, ira: *Analyze) !*Inst {
- return error.Unimplemented; // TODO
- }
+fn parseError(ctx: *ParseContext, comptime format: []const u8, args: var) error{ ParseFailure, OutOfMemory } {
+ const msg = try std.fmt.allocPrint(ctx.allocator, format, args);
+ (try ctx.errors.addOne()).* = .{
+ .byte_offset = ctx.i,
+ .msg = msg,
};
+ return error.ParseFailure;
+}
- pub const CondBr = struct {
- base: Inst,
- params: Params,
-
- const Params = struct {
- condition: *Inst,
- then_block: *BasicBlock,
- else_block: *BasicBlock,
- is_comptime: *Inst,
- };
-
- const ir_val_init = IrVal.Init.NoReturn;
-
- pub fn dump(inst: *const CondBr) void {}
+fn parseType(ctx: *ParseContext) !*Value {
+ return parseError(ctx, "TODO parse type", .{});
+}
- pub fn hasSideEffects(inst: *const CondBr) bool {
- return true;
- }
+fn parseInstruction(ctx: *ParseContext) !*Inst {
+ switch (ctx.source[ctx.i]) {
+ '"' => return parseStringLiteralConst(ctx),
+ '0'...'9' => return parseIntegerLiteralConst(ctx),
+ else => {},
+ }
+ const fn_name = skipToAndOver(ctx, '(');
+ return parseError(ctx, "TODO parse instruction '{}'", .{fn_name});
+}
- pub fn analyze(self: *const CondBr, ira: *Analyze) !*Inst {
- return error.Unimplemented; // TODO
- }
+fn parseStringLiteralConst(ctx: *ParseContext) !*Inst {
+ const start = ctx.i;
+ ctx.i += 1; // skip over '"'
+
+ while (ctx.i < ctx.source.len) : (ctx.i += 1) switch (ctx.source[ctx.i]) {
+ '"' => {
+ ctx.i += 1;
+ const span = ctx.source[start..ctx.i];
+ var bad_index: usize = undefined;
+ const parsed = std.zig.parseStringLiteral(ctx.allocator, span, &bad_index) catch |err| switch (err) {
+ error.InvalidCharacter => {
+ ctx.i = start + bad_index;
+ const bad_byte = ctx.source[ctx.i];
+ return parseError(ctx, "invalid string literal character: '{c}'\n", .{bad_byte});
+ },
+ else => |e| return e,
+ };
+ const bytes_val = try ctx.allocator.create(Value.Bytes);
+ bytes_val.* = .{ .data = parsed };
+ const const_inst = try ctx.allocator.create(Inst.Constant);
+ const_inst.* = .{ .value = &bytes_val.base };
+ return &const_inst.base;
+ },
+ '\\' => {
+ ctx.i += 1;
+ if (ctx.i >= ctx.source.len) break;
+ continue;
+ },
+ else => continue,
};
+ return parseError(ctx, "unexpected EOF in string literal", .{});
+}
- pub const AddImplicitReturnType = struct {
- base: Inst,
- params: Params,
-
- pub const Params = struct {
- target: *Inst,
- };
-
- const ir_val_init = IrVal.Init.Unknown;
-
- pub fn dump(inst: *const AddImplicitReturnType) void {
- std.debug.warn("#{}", .{inst.params.target.debug_id});
- }
-
- pub fn hasSideEffects(inst: *const AddImplicitReturnType) bool {
- return true;
- }
-
- pub fn analyze(self: *const AddImplicitReturnType, ira: *Analyze) !*Inst {
- const target = try self.params.target.getAsParam();
- try ira.src_implicit_return_type_list.append(target);
- return ira.irb.buildConstVoid(self.base.scope, self.base.span, true);
- }
- };
+fn parseIntegerLiteralConst(ctx: *ParseContext) !*Inst {
+ return parseError(ctx, "TODO parse integer literal", .{});
+}
- pub const TestErr = struct {
- base: Inst,
- params: Params,
+pub fn main() anyerror!void {
+ var arena = std.heap.ArenaAllocator.init(std.heap.page_allocator);
+ defer arena.deinit();
+ const allocator = &arena.allocator;
- pub const Params = struct {
- target: *Inst,
- };
+ const args = try std.process.argsAlloc(allocator);
- const ir_val_init = IrVal.Init.Unknown;
+ const src_path = args[1];
+ const debug_error_trace = true;
- pub fn dump(inst: *const TestErr) void {
- std.debug.warn("#{}", .{inst.params.target.debug_id});
- }
+ const source = try std.fs.cwd().readFileAlloc(allocator, src_path, std.math.maxInt(u32));
- pub fn hasSideEffects(inst: *const TestErr) bool {
- return false;
+ const tree = try parse(allocator, source);
+ if (tree.errors.items.len != 0) {
+ for (tree.errors.items) |err_msg| {
+ const loc = findLineColumn(source, err_msg.byte_offset);
+ std.debug.warn("{}:{}:{}: error: {}\n", .{ src_path, loc.line + 1, loc.column + 1, err_msg.msg });
}
+ if (debug_error_trace) return error.ParseFailure;
+ std.process.exit(1);
+ }
+}
- pub fn analyze(self: *const TestErr, ira: *Analyze) !*Inst {
- const target = try self.params.target.getAsParam();
- const target_type = target.getKnownType();
- switch (target_type.id) {
- .ErrorUnion => {
- return error.Unimplemented;
- // if (instr_is_comptime(value)) {
- // ConstExprValue *err_union_val = ir_resolve_const(ira, value, UndefBad);
- // if (!err_union_val)
- // return ira->codegen->builtin_types.entry_invalid;
-
- // if (err_union_val->special != ConstValSpecialRuntime) {
- // ConstExprValue *out_val = ir_build_const_from(ira, &instruction->base);
- // out_val->data.x_bool = (err_union_val->data.x_err_union.err != nullptr);
- // return ira->codegen->builtin_types.entry_bool;
- // }
- // }
-
- // TypeTableEntry *err_set_type = type_entry->data.error_union.err_set_type;
- // if (!resolve_inferred_error_set(ira->codegen, err_set_type, instruction->base.source_node)) {
- // return ira->codegen->builtin_types.entry_invalid;
- // }
- // if (!type_is_global_error_set(err_set_type) &&
- // err_set_type->data.error_set.err_count == 0)
- // {
- // assert(err_set_type->data.error_set.infer_fn == nullptr);
- // ConstExprValue *out_val = ir_build_const_from(ira, &instruction->base);
- // out_val->data.x_bool = false;
- // return ira->codegen->builtin_types.entry_bool;
- // }
-
- // ir_build_test_err_from(&ira->new_irb, &instruction->base, value);
- // return ira->codegen->builtin_types.entry_bool;
- },
- .ErrorSet => {
- return ira.irb.buildConstBool(self.base.scope, self.base.span, true);
- },
- else => {
- return ira.irb.buildConstBool(self.base.scope, self.base.span, false);
- },
- }
+fn findLineColumn(source: []const u8, byte_offset: usize) struct { line: usize, column: usize } {
+ var line: usize = 0;
+ var column: usize = 0;
+ for (source[0..byte_offset]) |byte| {
+ switch (byte) {
+ '\n' => {
+ line += 1;
+ column = 0;
+ },
+ else => {
+ column += 1;
+ },
}
- };
-
- pub const TestCompTime = struct {
- base: Inst,
- params: Params,
-
- pub const Params = struct {
- target: *Inst,
- };
-
- const ir_val_init = IrVal.Init.Unknown;
-
- pub fn dump(inst: *const TestCompTime) void {
- std.debug.warn("#{}", .{inst.params.target.debug_id});
- }
-
- pub fn hasSideEffects(inst: *const TestCompTime) bool {
- return false;
- }
-
- pub fn analyze(self: *const TestCompTime, ira: *Analyze) !*Inst {
- const target = try self.params.target.getAsParam();
- return ira.irb.buildConstBool(self.base.scope, self.base.span, target.isCompTime());
- }
- };
-
- pub const SaveErrRetAddr = struct {
- base: Inst,
- params: Params,
-
- const Params = struct {};
-
- const ir_val_init = IrVal.Init.Unknown;
-
- pub fn dump(inst: *const SaveErrRetAddr) void {}
-
- pub fn hasSideEffects(inst: *const SaveErrRetAddr) bool {
- return true;
- }
-
- pub fn analyze(self: *const SaveErrRetAddr, ira: *Analyze) !*Inst {
- return ira.irb.build(Inst.SaveErrRetAddr, self.base.scope, self.base.span, Params{});
- }
- };
-};
-
-pub const Variable = struct {
- child_scope: *Scope,
-};
-
-pub const BasicBlock = struct {
- ref_count: usize,
- name_hint: [*:0]const u8,
- debug_id: usize,
- scope: *Scope,
- instruction_list: std.ArrayList(*Inst),
- ref_instruction: ?*Inst,
-
- /// for codegen
- llvm_block: *llvm.BasicBlock,
- llvm_exit_block: *llvm.BasicBlock,
-
- /// the basic block that is derived from this one in analysis
- child: ?*BasicBlock,
-
- /// the basic block that this one derives from in analysis
- parent: ?*BasicBlock,
-
- pub fn ref(self: *BasicBlock, builder: *Builder) void {
- self.ref_count += 1;
- }
-
- pub fn linkToParent(self: *BasicBlock, parent: *BasicBlock) void {
- assert(self.parent == null);
- assert(parent.child == null);
- self.parent = parent;
- parent.child = self;
- }
-};
-
-/// Stuff that survives longer than Builder
-pub const Code = struct {
- basic_block_list: std.ArrayList(*BasicBlock),
- arena: std.heap.ArenaAllocator,
- return_type: ?*Type,
- tree_scope: *Scope.AstTree,
-
- /// allocator is comp.gpa()
- pub fn destroy(self: *Code, allocator: *Allocator) void {
- self.arena.deinit();
- allocator.destroy(self);
- }
-
- pub fn dump(self: *Code) void {
- var bb_i: usize = 0;
- for (self.basic_block_list.span()) |bb| {
- std.debug.warn("{s}_{}:\n", .{ bb.name_hint, bb.debug_id });
- for (bb.instruction_list.span()) |instr| {
- std.debug.warn(" ", .{});
- instr.dump();
- std.debug.warn("\n", .{});
- }
- }
- }
-
- /// returns a ref-incremented value, or adds a compile error
- pub fn getCompTimeResult(self: *Code, comp: *Compilation) !*Value {
- const bb = self.basic_block_list.at(0);
- for (bb.instruction_list.span()) |inst| {
- if (inst.cast(Inst.Return)) |ret_inst| {
- const ret_value = ret_inst.params.return_value;
- if (ret_value.isCompTime()) {
- return ret_value.val.KnownValue.getRef();
- }
- try comp.addCompileError(
- self.tree_scope,
- ret_value.span,
- "unable to evaluate constant expression",
- .{},
- );
- return error.SemanticAnalysisFailed;
- } else if (inst.hasSideEffects()) {
- try comp.addCompileError(
- self.tree_scope,
- inst.span,
- "unable to evaluate constant expression",
- .{},
- );
- return error.SemanticAnalysisFailed;
- }
- }
- unreachable;
- }
-};
-
-pub const Builder = struct {
- comp: *Compilation,
- code: *Code,
- current_basic_block: *BasicBlock,
- next_debug_id: usize,
- is_comptime: bool,
- is_async: bool,
- begin_scope: ?*Scope,
-
- pub const Error = Analyze.Error;
-
- pub fn init(comp: *Compilation, tree_scope: *Scope.AstTree, begin_scope: ?*Scope) !Builder {
- const code = try comp.gpa().create(Code);
- code.* = Code{
- .basic_block_list = undefined,
- .arena = std.heap.ArenaAllocator.init(comp.gpa()),
- .return_type = null,
- .tree_scope = tree_scope,
- };
- code.basic_block_list = std.ArrayList(*BasicBlock).init(&code.arena.allocator);
- errdefer code.destroy(comp.gpa());
-
- return Builder{
- .comp = comp,
- .current_basic_block = undefined,
- .code = code,
- .next_debug_id = 0,
- .is_comptime = false,
- .is_async = false,
- .begin_scope = begin_scope,
- };
- }
-
- pub fn abort(self: *Builder) void {
- self.code.destroy(self.comp.gpa());
- }
-
- /// Call code.destroy() when done
- pub fn finish(self: *Builder) *Code {
- return self.code;
- }
-
- /// No need to clean up resources thanks to the arena allocator.
- pub fn createBasicBlock(self: *Builder, scope: *Scope, name_hint: [*:0]const u8) !*BasicBlock {
- const basic_block = try self.arena().create(BasicBlock);
- basic_block.* = BasicBlock{
- .ref_count = 0,
- .name_hint = name_hint,
- .debug_id = self.next_debug_id,
- .scope = scope,
- .instruction_list = std.ArrayList(*Inst).init(self.arena()),
- .child = null,
- .parent = null,
- .ref_instruction = null,
- .llvm_block = undefined,
- .llvm_exit_block = undefined,
- };
- self.next_debug_id += 1;
- return basic_block;
- }
-
- pub fn setCursorAtEndAndAppendBlock(self: *Builder, basic_block: *BasicBlock) !void {
- try self.code.basic_block_list.append(basic_block);
- self.setCursorAtEnd(basic_block);
- }
-
- pub fn setCursorAtEnd(self: *Builder, basic_block: *BasicBlock) void {
- self.current_basic_block = basic_block;
- }
-
- pub fn genNodeRecursive(irb: *Builder, node: *ast.Node, scope: *Scope, lval: LVal) Error!*Inst {
- const alloc = irb.comp.gpa();
- var frame = try alloc.create(@Frame(genNode));
- defer alloc.destroy(frame);
- frame.* = async irb.genNode(node, scope, lval);
- return await frame;
- }
-
- pub async fn genNode(irb: *Builder, node: *ast.Node, scope: *Scope, lval: LVal) Error!*Inst {
- switch (node.id) {
- .Root => unreachable,
- .Use => unreachable,
- .TestDecl => unreachable,
- .VarDecl => return error.Unimplemented,
- .Defer => return error.Unimplemented,
- .InfixOp => return error.Unimplemented,
- .PrefixOp => {
- const prefix_op = @fieldParentPtr(ast.Node.PrefixOp, "base", node);
- switch (prefix_op.op) {
- .AddressOf => return error.Unimplemented,
- .ArrayType => |n| return error.Unimplemented,
- .Await => return error.Unimplemented,
- .BitNot => return error.Unimplemented,
- .BoolNot => return error.Unimplemented,
- .OptionalType => return error.Unimplemented,
- .Negation => return error.Unimplemented,
- .NegationWrap => return error.Unimplemented,
- .Resume => return error.Unimplemented,
- .PtrType => |ptr_info| {
- const inst = try irb.genPtrType(prefix_op, ptr_info, scope);
- return irb.lvalWrap(scope, inst, lval);
- },
- .SliceType => |ptr_info| return error.Unimplemented,
- .Try => return error.Unimplemented,
- }
- },
- .SuffixOp => {
- const suffix_op = @fieldParentPtr(ast.Node.SuffixOp, "base", node);
- switch (suffix_op.op) {
- .Call => |*call| {
- const inst = try irb.genCall(suffix_op, call, scope);
- return irb.lvalWrap(scope, inst, lval);
- },
- .ArrayAccess => |n| return error.Unimplemented,
- .Slice => |slice| return error.Unimplemented,
- .ArrayInitializer => |init_list| return error.Unimplemented,
- .StructInitializer => |init_list| return error.Unimplemented,
- .Deref => return error.Unimplemented,
- .UnwrapOptional => return error.Unimplemented,
- }
- },
- .Switch => return error.Unimplemented,
- .While => return error.Unimplemented,
- .For => return error.Unimplemented,
- .If => return error.Unimplemented,
- .ControlFlowExpression => {
- const control_flow_expr = @fieldParentPtr(ast.Node.ControlFlowExpression, "base", node);
- return irb.genControlFlowExpr(control_flow_expr, scope, lval);
- },
- .Suspend => return error.Unimplemented,
- .VarType => return error.Unimplemented,
- .ErrorType => return error.Unimplemented,
- .FnProto => return error.Unimplemented,
- .AnyFrameType => return error.Unimplemented,
- .IntegerLiteral => {
- const int_lit = @fieldParentPtr(ast.Node.IntegerLiteral, "base", node);
- return irb.lvalWrap(scope, try irb.genIntLit(int_lit, scope), lval);
- },
- .FloatLiteral => return error.Unimplemented,
- .StringLiteral => {
- const str_lit = @fieldParentPtr(ast.Node.StringLiteral, "base", node);
- const inst = try irb.genStrLit(str_lit, scope);
- return irb.lvalWrap(scope, inst, lval);
- },
- .MultilineStringLiteral => return error.Unimplemented,
- .CharLiteral => return error.Unimplemented,
- .BoolLiteral => return error.Unimplemented,
- .NullLiteral => return error.Unimplemented,
- .UndefinedLiteral => return error.Unimplemented,
- .Unreachable => return error.Unimplemented,
- .Identifier => {
- const identifier = @fieldParentPtr(ast.Node.Identifier, "base", node);
- return irb.genIdentifier(identifier, scope, lval);
- },
- .GroupedExpression => {
- const grouped_expr = @fieldParentPtr(ast.Node.GroupedExpression, "base", node);
- return irb.genNodeRecursive(grouped_expr.expr, scope, lval);
- },
- .BuiltinCall => return error.Unimplemented,
- .ErrorSetDecl => return error.Unimplemented,
- .ContainerDecl => return error.Unimplemented,
- .Asm => return error.Unimplemented,
- .Comptime => return error.Unimplemented,
- .Block => {
- const block = @fieldParentPtr(ast.Node.Block, "base", node);
- const inst = try irb.genBlock(block, scope);
- return irb.lvalWrap(scope, inst, lval);
- },
- .DocComment => return error.Unimplemented,
- .SwitchCase => return error.Unimplemented,
- .SwitchElse => return error.Unimplemented,
- .Else => return error.Unimplemented,
- .Payload => return error.Unimplemented,
- .PointerPayload => return error.Unimplemented,
- .PointerIndexPayload => return error.Unimplemented,
- .ContainerField => return error.Unimplemented,
- .ErrorTag => return error.Unimplemented,
- .AsmInput => return error.Unimplemented,
- .AsmOutput => return error.Unimplemented,
- .ParamDecl => return error.Unimplemented,
- .FieldInitializer => return error.Unimplemented,
- .EnumLiteral => return error.Unimplemented,
- .Noasync => return error.Unimplemented,
- }
- }
-
- fn genCall(irb: *Builder, suffix_op: *ast.Node.SuffixOp, call: *ast.Node.SuffixOp.Op.Call, scope: *Scope) !*Inst {
- const fn_ref = try irb.genNodeRecursive(suffix_op.lhs.node, scope, .None);
-
- const args = try irb.arena().alloc(*Inst, call.params.len);
- var it = call.params.iterator(0);
- var i: usize = 0;
- while (it.next()) |arg_node_ptr| : (i += 1) {
- args[i] = try irb.genNodeRecursive(arg_node_ptr.*, scope, .None);
- }
-
- //bool is_async = node->data.fn_call_expr.is_async;
- //IrInstruction *async_allocator = nullptr;
- //if (is_async) {
- // if (node->data.fn_call_expr.async_allocator) {
- // async_allocator = ir_gen_node(irb, node->data.fn_call_expr.async_allocator, scope);
- // if (async_allocator == irb->codegen->invalid_instruction)
- // return async_allocator;
- // }
- //}
-
- return irb.build(Inst.Call, scope, Span.token(suffix_op.rtoken), Inst.Call.Params{
- .fn_ref = fn_ref,
- .args = args,
- });
- //IrInstruction *fn_call = ir_build_call(irb, scope, node, nullptr, fn_ref, arg_count, args, false, FnInlineAuto, is_async, async_allocator, nullptr);
- //return ir_lval_wrap(irb, scope, fn_call, lval);
- }
-
- fn genPtrType(
- irb: *Builder,
- prefix_op: *ast.Node.PrefixOp,
- ptr_info: ast.Node.PrefixOp.PtrInfo,
- scope: *Scope,
- ) !*Inst {
- // TODO port more logic
-
- //assert(node->type == NodeTypePointerType);
- //PtrLen ptr_len = (node->data.pointer_type.star_token->id == TokenIdStar ||
- // node->data.pointer_type.star_token->id == TokenIdStarStar) ? PtrLenSingle : PtrLenUnknown;
- //bool is_const = node->data.pointer_type.is_const;
- //bool is_volatile = node->data.pointer_type.is_volatile;
- //AstNode *expr_node = node->data.pointer_type.op_expr;
- //AstNode *align_expr = node->data.pointer_type.align_expr;
-
- //IrInstruction *align_value;
- //if (align_expr != nullptr) {
- // align_value = ir_gen_node(irb, align_expr, scope);
- // if (align_value == irb->codegen->invalid_instruction)
- // return align_value;
- //} else {
- // align_value = nullptr;
- //}
- const child_type = try irb.genNodeRecursive(prefix_op.rhs, scope, .None);
-
- //uint32_t bit_offset_start = 0;
- //if (node->data.pointer_type.bit_offset_start != nullptr) {
- // if (!bigint_fits_in_bits(node->data.pointer_type.bit_offset_start, 32, false)) {
- // Buf *val_buf = buf_alloc();
- // bigint_append_buf(val_buf, node->data.pointer_type.bit_offset_start, 10);
- // exec_add_error_node(irb->codegen, irb->exec, node,
- // buf_sprintf("value %s too large for u32 bit offset", buf_ptr(val_buf)));
- // return irb->codegen->invalid_instruction;
- // }
- // bit_offset_start = bigint_as_unsigned(node->data.pointer_type.bit_offset_start);
- //}
-
- //uint32_t bit_offset_end = 0;
- //if (node->data.pointer_type.bit_offset_end != nullptr) {
- // if (!bigint_fits_in_bits(node->data.pointer_type.bit_offset_end, 32, false)) {
- // Buf *val_buf = buf_alloc();
- // bigint_append_buf(val_buf, node->data.pointer_type.bit_offset_end, 10);
- // exec_add_error_node(irb->codegen, irb->exec, node,
- // buf_sprintf("value %s too large for u32 bit offset", buf_ptr(val_buf)));
- // return irb->codegen->invalid_instruction;
- // }
- // bit_offset_end = bigint_as_unsigned(node->data.pointer_type.bit_offset_end);
- //}
-
- //if ((bit_offset_start != 0 || bit_offset_end != 0) && bit_offset_start >= bit_offset_end) {
- // exec_add_error_node(irb->codegen, irb->exec, node,
- // buf_sprintf("bit offset start must be less than bit offset end"));
- // return irb->codegen->invalid_instruction;
- //}
-
- return irb.build(Inst.PtrType, scope, Span.node(&prefix_op.base), Inst.PtrType.Params{
- .child_type = child_type,
- .mut = .Mut,
- .vol = .Non,
- .size = .Many,
- .alignment = null,
- });
- }
-
- fn isCompTime(irb: *Builder, target_scope: *Scope) bool {
- if (irb.is_comptime)
- return true;
-
- var scope = target_scope;
- while (true) {
- switch (scope.id) {
- .CompTime => return true,
- .FnDef => return false,
- .Decls => unreachable,
- .Root => unreachable,
- .AstTree => unreachable,
- .Block,
- .Defer,
- .DeferExpr,
- .Var,
- => scope = scope.parent.?,
- }
- }
- }
-
- pub fn genIntLit(irb: *Builder, int_lit: *ast.Node.IntegerLiteral, scope: *Scope) !*Inst {
- const int_token = irb.code.tree_scope.tree.tokenSlice(int_lit.token);
-
- var base: u8 = undefined;
- var rest: []const u8 = undefined;
- if (int_token.len >= 3 and int_token[0] == '0') {
- rest = int_token[2..];
- switch (int_token[1]) {
- 'b' => base = 2,
- 'o' => base = 8,
- 'x' => base = 16,
- else => {
- base = 10;
- rest = int_token;
- },
- }
- } else {
- base = 10;
- rest = int_token;
- }
-
- const comptime_int_type = Type.ComptimeInt.get(irb.comp);
- defer comptime_int_type.base.base.deref(irb.comp);
-
- const int_val = Value.Int.createFromString(
- irb.comp,
- &comptime_int_type.base,
- base,
- rest,
- ) catch |err| switch (err) {
- error.OutOfMemory => return error.OutOfMemory,
- error.InvalidBase => unreachable,
- error.InvalidCharForDigit => unreachable,
- error.DigitTooLargeForBase => unreachable,
- };
- errdefer int_val.base.deref(irb.comp);
-
- const inst = try irb.build(Inst.Const, scope, Span.token(int_lit.token), Inst.Const.Params{});
- inst.val = IrVal{ .KnownValue = &int_val.base };
- return inst;
- }
-
- pub fn genStrLit(irb: *Builder, str_lit: *ast.Node.StringLiteral, scope: *Scope) !*Inst {
- const str_token = irb.code.tree_scope.tree.tokenSlice(str_lit.token);
- const src_span = Span.token(str_lit.token);
-
- var bad_index: usize = undefined;
- var buf = std.zig.parseStringLiteral(irb.comp.gpa(), str_token, &bad_index) catch |err| switch (err) {
- error.OutOfMemory => return error.OutOfMemory,
- error.InvalidCharacter => {
- try irb.comp.addCompileError(
- irb.code.tree_scope,
- src_span,
- "invalid character in string literal: '{c}'",
- .{str_token[bad_index]},
- );
- return error.SemanticAnalysisFailed;
- },
- };
- var buf_cleaned = false;
- errdefer if (!buf_cleaned) irb.comp.gpa().free(buf);
-
- if (str_token[0] == 'c') {
- // first we add a null
- buf = try irb.comp.gpa().realloc(buf, buf.len + 1);
- buf[buf.len - 1] = 0;
-
- // next make an array value
- const array_val = try Value.Array.createOwnedBuffer(irb.comp, buf);
- buf_cleaned = true;
- defer array_val.base.deref(irb.comp);
-
- // then make a pointer value pointing at the first element
- const ptr_val = try Value.Ptr.createArrayElemPtr(
- irb.comp,
- array_val,
- .Const,
- .Many,
- 0,
- );
- defer ptr_val.base.deref(irb.comp);
-
- return irb.buildConstValue(scope, src_span, &ptr_val.base);
- } else {
- const array_val = try Value.Array.createOwnedBuffer(irb.comp, buf);
- buf_cleaned = true;
- defer array_val.base.deref(irb.comp);
-
- return irb.buildConstValue(scope, src_span, &array_val.base);
- }
- }
-
- pub fn genBlock(irb: *Builder, block: *ast.Node.Block, parent_scope: *Scope) !*Inst {
- const block_scope = try Scope.Block.create(irb.comp, parent_scope);
-
- const outer_block_scope = &block_scope.base;
- var child_scope = outer_block_scope;
-
- if (parent_scope.findFnDef()) |fndef_scope| {
- if (fndef_scope.fn_val.?.block_scope == null) {
- fndef_scope.fn_val.?.block_scope = block_scope;
- }
- }
-
- if (block.statements.len == 0) {
- // {}
- return irb.buildConstVoid(child_scope, Span.token(block.lbrace), false);
- }
-
- if (block.label) |label| {
- block_scope.incoming_values = std.ArrayList(*Inst).init(irb.arena());
- block_scope.incoming_blocks = std.ArrayList(*BasicBlock).init(irb.arena());
- block_scope.end_block = try irb.createBasicBlock(parent_scope, "BlockEnd");
- block_scope.is_comptime = try irb.buildConstBool(
- parent_scope,
- Span.token(block.lbrace),
- irb.isCompTime(parent_scope),
- );
- }
-
- var is_continuation_unreachable = false;
- var noreturn_return_value: ?*Inst = null;
-
- var stmt_it = block.statements.iterator(0);
- while (stmt_it.next()) |statement_node_ptr| {
- const statement_node = statement_node_ptr.*;
-
- if (statement_node.cast(ast.Node.Defer)) |defer_node| {
- // defer starts a new scope
- const defer_token = irb.code.tree_scope.tree.tokens.at(defer_node.defer_token);
- const kind = switch (defer_token.id) {
- Token.Id.Keyword_defer => Scope.Defer.Kind.ScopeExit,
- Token.Id.Keyword_errdefer => Scope.Defer.Kind.ErrorExit,
- else => unreachable,
- };
- const defer_expr_scope = try Scope.DeferExpr.create(irb.comp, parent_scope, defer_node.expr);
- const defer_child_scope = try Scope.Defer.create(irb.comp, parent_scope, kind, defer_expr_scope);
- child_scope = &defer_child_scope.base;
- continue;
- }
- const statement_value = try irb.genNodeRecursive(statement_node, child_scope, .None);
-
- is_continuation_unreachable = statement_value.isNoReturn();
- if (is_continuation_unreachable) {
- // keep the last noreturn statement value around in case we need to return it
- noreturn_return_value = statement_value;
- }
-
- if (statement_value.cast(Inst.DeclVar)) |decl_var| {
- // variable declarations start a new scope
- child_scope = decl_var.params.variable.child_scope;
- } else if (!is_continuation_unreachable) {
- // this statement's value must be void
- _ = try irb.build(
- Inst.CheckVoidStmt,
- child_scope,
- Span{
- .first = statement_node.firstToken(),
- .last = statement_node.lastToken(),
- },
- Inst.CheckVoidStmt.Params{ .target = statement_value },
- );
- }
- }
-
- if (is_continuation_unreachable) {
- assert(noreturn_return_value != null);
- if (block.label == null or block_scope.incoming_blocks.len == 0) {
- return noreturn_return_value.?;
- }
-
- try irb.setCursorAtEndAndAppendBlock(block_scope.end_block);
- return irb.build(Inst.Phi, parent_scope, Span.token(block.rbrace), Inst.Phi.Params{
- .incoming_blocks = block_scope.incoming_blocks.toOwnedSlice(),
- .incoming_values = block_scope.incoming_values.toOwnedSlice(),
- });
- }
-
- if (block.label) |label| {
- try block_scope.incoming_blocks.append(irb.current_basic_block);
- try block_scope.incoming_values.append(
- try irb.buildConstVoid(parent_scope, Span.token(block.rbrace), true),
- );
- _ = try irb.genDefersForBlock(child_scope, outer_block_scope, .ScopeExit);
-
- _ = try irb.buildGen(Inst.Br, parent_scope, Span.token(block.rbrace), Inst.Br.Params{
- .dest_block = block_scope.end_block,
- .is_comptime = block_scope.is_comptime,
- });
-
- try irb.setCursorAtEndAndAppendBlock(block_scope.end_block);
-
- return irb.build(Inst.Phi, parent_scope, Span.token(block.rbrace), Inst.Phi.Params{
- .incoming_blocks = block_scope.incoming_blocks.toOwnedSlice(),
- .incoming_values = block_scope.incoming_values.toOwnedSlice(),
- });
- }
-
- _ = try irb.genDefersForBlock(child_scope, outer_block_scope, .ScopeExit);
- return irb.buildConstVoid(child_scope, Span.token(block.rbrace), true);
- }
-
- pub fn genControlFlowExpr(
- irb: *Builder,
- control_flow_expr: *ast.Node.ControlFlowExpression,
- scope: *Scope,
- lval: LVal,
- ) !*Inst {
- switch (control_flow_expr.kind) {
- .Break => |arg| return error.Unimplemented,
- .Continue => |arg| return error.Unimplemented,
- .Return => {
- const src_span = Span.token(control_flow_expr.ltoken);
- if (scope.findFnDef() == null) {
- try irb.comp.addCompileError(
- irb.code.tree_scope,
- src_span,
- "return expression outside function definition",
- .{},
- );
- return error.SemanticAnalysisFailed;
- }
-
- if (scope.findDeferExpr()) |scope_defer_expr| {
- if (!scope_defer_expr.reported_err) {
- try irb.comp.addCompileError(
- irb.code.tree_scope,
- src_span,
- "cannot return from defer expression",
- .{},
- );
- scope_defer_expr.reported_err = true;
- }
- return error.SemanticAnalysisFailed;
- }
-
- const outer_scope = irb.begin_scope.?;
- const return_value = if (control_flow_expr.rhs) |rhs| blk: {
- break :blk try irb.genNodeRecursive(rhs, scope, .None);
- } else blk: {
- break :blk try irb.buildConstVoid(scope, src_span, true);
- };
-
- const defer_counts = irb.countDefers(scope, outer_scope);
- const have_err_defers = defer_counts.error_exit != 0;
- if (have_err_defers or irb.comp.have_err_ret_tracing) {
- const err_block = try irb.createBasicBlock(scope, "ErrRetErr");
- const ok_block = try irb.createBasicBlock(scope, "ErrRetOk");
- if (!have_err_defers) {
- _ = try irb.genDefersForBlock(scope, outer_scope, .ScopeExit);
- }
-
- const is_err = try irb.build(
- Inst.TestErr,
- scope,
- src_span,
- Inst.TestErr.Params{ .target = return_value },
- );
-
- const err_is_comptime = try irb.buildTestCompTime(scope, src_span, is_err);
-
- _ = try irb.buildGen(Inst.CondBr, scope, src_span, Inst.CondBr.Params{
- .condition = is_err,
- .then_block = err_block,
- .else_block = ok_block,
- .is_comptime = err_is_comptime,
- });
-
- const ret_stmt_block = try irb.createBasicBlock(scope, "RetStmt");
-
- try irb.setCursorAtEndAndAppendBlock(err_block);
- if (have_err_defers) {
- _ = try irb.genDefersForBlock(scope, outer_scope, .ErrorExit);
- }
- if (irb.comp.have_err_ret_tracing and !irb.isCompTime(scope)) {
- _ = try irb.build(Inst.SaveErrRetAddr, scope, src_span, Inst.SaveErrRetAddr.Params{});
- }
- _ = try irb.build(Inst.Br, scope, src_span, Inst.Br.Params{
- .dest_block = ret_stmt_block,
- .is_comptime = err_is_comptime,
- });
-
- try irb.setCursorAtEndAndAppendBlock(ok_block);
- if (have_err_defers) {
- _ = try irb.genDefersForBlock(scope, outer_scope, .ScopeExit);
- }
- _ = try irb.build(Inst.Br, scope, src_span, Inst.Br.Params{
- .dest_block = ret_stmt_block,
- .is_comptime = err_is_comptime,
- });
-
- try irb.setCursorAtEndAndAppendBlock(ret_stmt_block);
- return irb.genAsyncReturn(scope, src_span, return_value, false);
- } else {
- _ = try irb.genDefersForBlock(scope, outer_scope, .ScopeExit);
- return irb.genAsyncReturn(scope, src_span, return_value, false);
- }
- },
- }
- }
-
- pub fn genIdentifier(irb: *Builder, identifier: *ast.Node.Identifier, scope: *Scope, lval: LVal) !*Inst {
- const src_span = Span.token(identifier.token);
- const name = irb.code.tree_scope.tree.tokenSlice(identifier.token);
-
- //if (buf_eql_str(variable_name, "_") && lval == LValPtr) {
- // IrInstructionConst *const_instruction = ir_build_instruction<IrInstructionConst>(irb, scope, node);
- // const_instruction->base.value.type = get_pointer_to_type(irb->codegen,
- // irb->codegen->builtin_types.entry_void, false);
- // const_instruction->base.value.special = ConstValSpecialStatic;
- // const_instruction->base.value.data.x_ptr.special = ConstPtrSpecialDiscard;
- // return &const_instruction->base;
- //}
-
- if (irb.comp.getPrimitiveType(name)) |result| {
- if (result) |primitive_type| {
- defer primitive_type.base.deref(irb.comp);
- switch (lval) {
- // if (lval == LValPtr) {
- // return ir_build_ref(irb, scope, node, value, false, false);
- .Ptr => return error.Unimplemented,
- .None => return irb.buildConstValue(scope, src_span, &primitive_type.base),
- }
- }
- } else |err| switch (err) {
- error.Overflow => {
- try irb.comp.addCompileError(irb.code.tree_scope, src_span, "integer too large", .{});
- return error.SemanticAnalysisFailed;
- },
- error.OutOfMemory => return error.OutOfMemory,
- }
-
- switch (irb.findIdent(scope, name)) {
- .Decl => |decl| {
- return irb.build(Inst.DeclRef, scope, src_span, Inst.DeclRef.Params{
- .decl = decl,
- .lval = lval,
- });
- },
- .VarScope => |var_scope| {
- const var_ptr = try irb.build(Inst.VarPtr, scope, src_span, Inst.VarPtr.Params{ .var_scope = var_scope });
- switch (lval) {
- .Ptr => return var_ptr,
- .None => {
- return irb.build(Inst.LoadPtr, scope, src_span, Inst.LoadPtr.Params{ .target = var_ptr });
- },
- }
- },
- .NotFound => {},
- }
-
- //if (node->owner->any_imports_failed) {
- // // skip the error message since we had a failing import in this file
- // // if an import breaks we don't need redundant undeclared identifier errors
- // return irb->codegen->invalid_instruction;
- //}
-
- // TODO put a variable of same name with invalid type in global scope
- // so that future references to this same name will find a variable with an invalid type
-
- try irb.comp.addCompileError(irb.code.tree_scope, src_span, "unknown identifier '{}'", .{name});
- return error.SemanticAnalysisFailed;
- }
-
- const DeferCounts = struct {
- scope_exit: usize,
- error_exit: usize,
- };
-
- fn countDefers(irb: *Builder, inner_scope: *Scope, outer_scope: *Scope) DeferCounts {
- var result = DeferCounts{ .scope_exit = 0, .error_exit = 0 };
-
- var scope = inner_scope;
- while (scope != outer_scope) {
- switch (scope.id) {
- .Defer => {
- const defer_scope = @fieldParentPtr(Scope.Defer, "base", scope);
- switch (defer_scope.kind) {
- .ScopeExit => result.scope_exit += 1,
- .ErrorExit => result.error_exit += 1,
- }
- scope = scope.parent orelse break;
- },
- .FnDef => break,
-
- .CompTime,
- .Block,
- .Decls,
- .Root,
- .Var,
- => scope = scope.parent orelse break,
-
- .DeferExpr => unreachable,
- .AstTree => unreachable,
- }
- }
- return result;
- }
-
- fn genDefersForBlock(
- irb: *Builder,
- inner_scope: *Scope,
- outer_scope: *Scope,
- gen_kind: Scope.Defer.Kind,
- ) !bool {
- var scope = inner_scope;
- var is_noreturn = false;
- while (true) {
- switch (scope.id) {
- .Defer => {
- const defer_scope = @fieldParentPtr(Scope.Defer, "base", scope);
- const generate = switch (defer_scope.kind) {
- .ScopeExit => true,
- .ErrorExit => gen_kind == .ErrorExit,
- };
- if (generate) {
- const defer_expr_scope = defer_scope.defer_expr_scope;
- const instruction = try irb.genNodeRecursive(
- defer_expr_scope.expr_node,
- &defer_expr_scope.base,
- .None,
- );
- if (instruction.isNoReturn()) {
- is_noreturn = true;
- } else {
- _ = try irb.build(
- Inst.CheckVoidStmt,
- &defer_expr_scope.base,
- Span.token(defer_expr_scope.expr_node.lastToken()),
- Inst.CheckVoidStmt.Params{ .target = instruction },
- );
- }
- }
- },
- .FnDef,
- .Decls,
- .Root,
- => return is_noreturn,
-
- .CompTime,
- .Block,
- .Var,
- => scope = scope.parent orelse return is_noreturn,
-
- .DeferExpr => unreachable,
- .AstTree => unreachable,
- }
- }
- }
-
- pub fn lvalWrap(irb: *Builder, scope: *Scope, instruction: *Inst, lval: LVal) !*Inst {
- switch (lval) {
- .None => return instruction,
- .Ptr => {
- // We needed a pointer to a value, but we got a value. So we create
- // an instruction which just makes a const pointer of it.
- return irb.build(Inst.Ref, scope, instruction.span, Inst.Ref.Params{
- .target = instruction,
- .mut = .Const,
- .volatility = .Non,
- });
- },
- }
- }
-
- fn arena(self: *Builder) *Allocator {
- return &self.code.arena.allocator;
- }
-
- fn buildExtra(
- self: *Builder,
- comptime I: type,
- scope: *Scope,
- span: Span,
- params: I.Params,
- is_generated: bool,
- ) !*Inst {
- const inst = try self.arena().create(I);
- inst.* = I{
- .base = Inst{
- .id = Inst.typeToId(I),
- .is_generated = is_generated,
- .scope = scope,
- .debug_id = self.next_debug_id,
- .val = switch (I.ir_val_init) {
- .Unknown => IrVal.Unknown,
- .NoReturn => IrVal{ .KnownValue = &Value.NoReturn.get(self.comp).base },
- .Void => IrVal{ .KnownValue = &Value.Void.get(self.comp).base },
- },
- .ref_count = 0,
- .span = span,
- .child = null,
- .parent = null,
- .llvm_value = undefined,
- .owner_bb = self.current_basic_block,
- },
- .params = params,
- };
-
- // Look at the params and ref() other instructions
- inline for (@typeInfo(I.Params).Struct.fields) |f| {
- switch (f.field_type) {
- *Inst => @field(inst.params, f.name).ref(self),
- *BasicBlock => @field(inst.params, f.name).ref(self),
- ?*Inst => if (@field(inst.params, f.name)) |other| other.ref(self),
- []*Inst => {
- // TODO https://github.com/ziglang/zig/issues/1269
- for (@field(inst.params, f.name)) |other|
- other.ref(self);
- },
- []*BasicBlock => {
- // TODO https://github.com/ziglang/zig/issues/1269
- for (@field(inst.params, f.name)) |other|
- other.ref(self);
- },
- Type.Pointer.Mut,
- Type.Pointer.Vol,
- Type.Pointer.Size,
- LVal,
- *Decl,
- *Scope.Var,
- => {},
- // it's ok to add more types here, just make sure that
- // any instructions and basic blocks are ref'd appropriately
- else => @compileError("unrecognized type in Params: " ++ @typeName(f.field_type)),
- }
- }
-
- self.next_debug_id += 1;
- try self.current_basic_block.instruction_list.append(&inst.base);
- return &inst.base;
- }
-
- fn build(
- self: *Builder,
- comptime I: type,
- scope: *Scope,
- span: Span,
- params: I.Params,
- ) !*Inst {
- return self.buildExtra(I, scope, span, params, false);
- }
-
- fn buildGen(
- self: *Builder,
- comptime I: type,
- scope: *Scope,
- span: Span,
- params: I.Params,
- ) !*Inst {
- return self.buildExtra(I, scope, span, params, true);
- }
-
- fn buildConstBool(self: *Builder, scope: *Scope, span: Span, x: bool) !*Inst {
- const inst = try self.build(Inst.Const, scope, span, Inst.Const.Params{});
- inst.val = IrVal{ .KnownValue = &Value.Bool.get(self.comp, x).base };
- return inst;
- }
-
- fn buildConstVoid(self: *Builder, scope: *Scope, span: Span, is_generated: bool) !*Inst {
- const inst = try self.buildExtra(Inst.Const, scope, span, Inst.Const.Params{}, is_generated);
- inst.val = IrVal{ .KnownValue = &Value.Void.get(self.comp).base };
- return inst;
- }
-
- fn buildConstValue(self: *Builder, scope: *Scope, span: Span, v: *Value) !*Inst {
- const inst = try self.build(Inst.Const, scope, span, Inst.Const.Params{});
- inst.val = IrVal{ .KnownValue = v.getRef() };
- return inst;
- }
-
- /// If the code is explicitly set to be comptime, then builds a const bool,
- /// otherwise builds a TestCompTime instruction.
- fn buildTestCompTime(self: *Builder, scope: *Scope, span: Span, target: *Inst) !*Inst {
- if (self.isCompTime(scope)) {
- return self.buildConstBool(scope, span, true);
- } else {
- return self.build(
- Inst.TestCompTime,
- scope,
- span,
- Inst.TestCompTime.Params{ .target = target },
- );
- }
- }
-
- fn genAsyncReturn(irb: *Builder, scope: *Scope, span: Span, result: *Inst, is_gen: bool) !*Inst {
- _ = try irb.buildGen(
- Inst.AddImplicitReturnType,
- scope,
- span,
- Inst.AddImplicitReturnType.Params{ .target = result },
- );
-
- if (!irb.is_async) {
- return irb.buildExtra(
- Inst.Return,
- scope,
- span,
- Inst.Return.Params{ .return_value = result },
- is_gen,
- );
- }
- return error.Unimplemented;
}
-
- const Ident = union(enum) {
- NotFound,
- Decl: *Decl,
- VarScope: *Scope.Var,
- };
-
- fn findIdent(irb: *Builder, scope: *Scope, name: []const u8) Ident {
- var s = scope;
- while (true) {
- switch (s.id) {
- .Root => return .NotFound,
- .Decls => {
- const decls = @fieldParentPtr(Scope.Decls, "base", s);
- const locked_table = decls.table.acquireRead();
- defer locked_table.release();
- if (locked_table.value.get(name)) |entry| {
- return Ident{ .Decl = entry.value };
- }
- },
- .Var => {
- const var_scope = @fieldParentPtr(Scope.Var, "base", s);
- if (mem.eql(u8, var_scope.name, name)) {
- return Ident{ .VarScope = var_scope };
- }
- },
- else => {},
- }
- s = s.parent.?;
- }
- }
-};
-
-const Analyze = struct {
- irb: Builder,
- old_bb_index: usize,
- const_predecessor_bb: ?*BasicBlock,
- parent_basic_block: *BasicBlock,
- instruction_index: usize,
- src_implicit_return_type_list: std.ArrayList(*Inst),
- explicit_return_type: ?*Type,
-
- pub const Error = error{
- /// This is only for when we have already reported a compile error. It is the poison value.
- SemanticAnalysisFailed,
-
- /// This is a placeholder - it is useful to use instead of panicking but once the compiler is
- /// done this error code will be removed.
- Unimplemented,
-
- OutOfMemory,
- };
-
- pub fn init(comp: *Compilation, tree_scope: *Scope.AstTree, explicit_return_type: ?*Type) !Analyze {
- var irb = try Builder.init(comp, tree_scope, null);
- errdefer irb.abort();
-
- return Analyze{
- .irb = irb,
- .old_bb_index = 0,
- .const_predecessor_bb = null,
- .parent_basic_block = undefined, // initialized with startBasicBlock
- .instruction_index = undefined, // initialized with startBasicBlock
- .src_implicit_return_type_list = std.ArrayList(*Inst).init(irb.arena()),
- .explicit_return_type = explicit_return_type,
- };
- }
-
- pub fn abort(self: *Analyze) void {
- self.irb.abort();
- }
-
- pub fn getNewBasicBlock(self: *Analyze, old_bb: *BasicBlock, ref_old_instruction: ?*Inst) !*BasicBlock {
- if (old_bb.child) |child| {
- if (ref_old_instruction == null or child.ref_instruction != ref_old_instruction)
- return child;
- }
-
- const new_bb = try self.irb.createBasicBlock(old_bb.scope, old_bb.name_hint);
- new_bb.linkToParent(old_bb);
- new_bb.ref_instruction = ref_old_instruction;
- return new_bb;
- }
-
- pub fn startBasicBlock(self: *Analyze, old_bb: *BasicBlock, const_predecessor_bb: ?*BasicBlock) void {
- self.instruction_index = 0;
- self.parent_basic_block = old_bb;
- self.const_predecessor_bb = const_predecessor_bb;
- }
-
- pub fn finishBasicBlock(ira: *Analyze, old_code: *Code) !void {
- try ira.irb.code.basic_block_list.append(ira.irb.current_basic_block);
- ira.instruction_index += 1;
-
- while (ira.instruction_index < ira.parent_basic_block.instruction_list.len) {
- const next_instruction = ira.parent_basic_block.instruction_list.at(ira.instruction_index);
-
- if (!next_instruction.is_generated) {
- try ira.addCompileError(next_instruction.span, "unreachable code", .{});
- break;
- }
- ira.instruction_index += 1;
- }
-
- ira.old_bb_index += 1;
-
- var need_repeat = true;
- while (true) {
- while (ira.old_bb_index < old_code.basic_block_list.len) {
- const old_bb = old_code.basic_block_list.at(ira.old_bb_index);
- const new_bb = old_bb.child orelse {
- ira.old_bb_index += 1;
- continue;
- };
- if (new_bb.instruction_list.len != 0) {
- ira.old_bb_index += 1;
- continue;
- }
- ira.irb.current_basic_block = new_bb;
-
- ira.startBasicBlock(old_bb, null);
- return;
- }
- if (!need_repeat)
- return;
- need_repeat = false;
- ira.old_bb_index = 0;
- continue;
- }
- }
-
- fn addCompileError(self: *Analyze, span: Span, comptime fmt: []const u8, args: var) !void {
- return self.irb.comp.addCompileError(self.irb.code.tree_scope, span, fmt, args);
- }
-
- fn resolvePeerTypes(self: *Analyze, expected_type: ?*Type, peers: []const *Inst) Analyze.Error!*Type {
- // TODO actual implementation
- return &Type.Void.get(self.irb.comp).base;
- }
-
- fn implicitCast(self: *Analyze, target: *Inst, optional_dest_type: ?*Type) Analyze.Error!*Inst {
- const dest_type = optional_dest_type orelse return target;
- const from_type = target.getKnownType();
- if (from_type == dest_type or from_type.id == .NoReturn) return target;
- return self.analyzeCast(target, target, dest_type);
- }
-
- fn analyzeCast(ira: *Analyze, source_instr: *Inst, target: *Inst, dest_type: *Type) !*Inst {
- const from_type = target.getKnownType();
-
- //if (type_is_invalid(wanted_type) || type_is_invalid(actual_type)) {
- // return ira->codegen->invalid_instruction;
- //}
-
- //// perfect match or non-const to const
- //ConstCastOnly const_cast_result = types_match_const_cast_only(ira, wanted_type, actual_type,
- // source_node, false);
- //if (const_cast_result.id == ConstCastResultIdOk) {
- // return ir_resolve_cast(ira, source_instr, value, wanted_type, CastOpNoop, false);
- //}
-
- //// widening conversion
- //if (wanted_type->id == TypeTableEntryIdInt &&
- // actual_type->id == TypeTableEntryIdInt &&
- // wanted_type->data.integral.is_signed == actual_type->data.integral.is_signed &&
- // wanted_type->data.integral.bit_count >= actual_type->data.integral.bit_count)
- //{
- // return ir_analyze_widen_or_shorten(ira, source_instr, value, wanted_type);
- //}
-
- //// small enough unsigned ints can get casted to large enough signed ints
- //if (wanted_type->id == TypeTableEntryIdInt && wanted_type->data.integral.is_signed &&
- // actual_type->id == TypeTableEntryIdInt && !actual_type->data.integral.is_signed &&
- // wanted_type->data.integral.bit_count > actual_type->data.integral.bit_count)
- //{
- // return ir_analyze_widen_or_shorten(ira, source_instr, value, wanted_type);
- //}
-
- //// float widening conversion
- //if (wanted_type->id == TypeTableEntryIdFloat &&
- // actual_type->id == TypeTableEntryIdFloat &&
- // wanted_type->data.floating.bit_count >= actual_type->data.floating.bit_count)
- //{
- // return ir_analyze_widen_or_shorten(ira, source_instr, value, wanted_type);
- //}
-
- //// cast from [N]T to []const T
- //if (is_slice(wanted_type) && actual_type->id == TypeTableEntryIdArray) {
- // TypeTableEntry *ptr_type = wanted_type->data.structure.fields[slice_ptr_index].type_entry;
- // assert(ptr_type->id == TypeTableEntryIdPointer);
- // if ((ptr_type->data.pointer.is_const || actual_type->data.array.len == 0) &&
- // types_match_const_cast_only(ira, ptr_type->data.pointer.child_type, actual_type->data.array.child_type,
- // source_node, false).id == ConstCastResultIdOk)
- // {
- // return ir_analyze_array_to_slice(ira, source_instr, value, wanted_type);
- // }
- //}
-
- //// cast from *const [N]T to []const T
- //if (is_slice(wanted_type) &&
- // actual_type->id == TypeTableEntryIdPointer &&
- // actual_type->data.pointer.is_const &&
- // actual_type->data.pointer.child_type->id == TypeTableEntryIdArray)
- //{
- // TypeTableEntry *ptr_type = wanted_type->data.structure.fields[slice_ptr_index].type_entry;
- // assert(ptr_type->id == TypeTableEntryIdPointer);
-
- // TypeTableEntry *array_type = actual_type->data.pointer.child_type;
-
- // if ((ptr_type->data.pointer.is_const || array_type->data.array.len == 0) &&
- // types_match_const_cast_only(ira, ptr_type->data.pointer.child_type, array_type->data.array.child_type,
- // source_node, false).id == ConstCastResultIdOk)
- // {
- // return ir_analyze_array_to_slice(ira, source_instr, value, wanted_type);
- // }
- //}
-
- //// cast from [N]T to *const []const T
- //if (wanted_type->id == TypeTableEntryIdPointer &&
- // wanted_type->data.pointer.is_const &&
- // is_slice(wanted_type->data.pointer.child_type) &&
- // actual_type->id == TypeTableEntryIdArray)
- //{
- // TypeTableEntry *ptr_type =
- // wanted_type->data.pointer.child_type->data.structure.fields[slice_ptr_index].type_entry;
- // assert(ptr_type->id == TypeTableEntryIdPointer);
- // if ((ptr_type->data.pointer.is_const || actual_type->data.array.len == 0) &&
- // types_match_const_cast_only(ira, ptr_type->data.pointer.child_type, actual_type->data.array.child_type,
- // source_node, false).id == ConstCastResultIdOk)
- // {
- // IrInstruction *cast1 = ir_analyze_cast(ira, source_instr, wanted_type->data.pointer.child_type, value);
- // if (type_is_invalid(cast1->value.type))
- // return ira->codegen->invalid_instruction;
-
- // IrInstruction *cast2 = ir_analyze_cast(ira, source_instr, wanted_type, cast1);
- // if (type_is_invalid(cast2->value.type))
- // return ira->codegen->invalid_instruction;
-
- // return cast2;
- // }
- //}
-
- //// cast from [N]T to ?[]const T
- //if (wanted_type->id == TypeTableEntryIdOptional &&
- // is_slice(wanted_type->data.maybe.child_type) &&
- // actual_type->id == TypeTableEntryIdArray)
- //{
- // TypeTableEntry *ptr_type =
- // wanted_type->data.maybe.child_type->data.structure.fields[slice_ptr_index].type_entry;
- // assert(ptr_type->id == TypeTableEntryIdPointer);
- // if ((ptr_type->data.pointer.is_const || actual_type->data.array.len == 0) &&
- // types_match_const_cast_only(ira, ptr_type->data.pointer.child_type, actual_type->data.array.child_type,
- // source_node, false).id == ConstCastResultIdOk)
- // {
- // IrInstruction *cast1 = ir_analyze_cast(ira, source_instr, wanted_type->data.maybe.child_type, value);
- // if (type_is_invalid(cast1->value.type))
- // return ira->codegen->invalid_instruction;
-
- // IrInstruction *cast2 = ir_analyze_cast(ira, source_instr, wanted_type, cast1);
- // if (type_is_invalid(cast2->value.type))
- // return ira->codegen->invalid_instruction;
-
- // return cast2;
- // }
- //}
-
- //// *[N]T to [*]T
- //if (wanted_type->id == TypeTableEntryIdPointer &&
- // wanted_type->data.pointer.ptr_len == PtrLenUnknown &&
- // actual_type->id == TypeTableEntryIdPointer &&
- // actual_type->data.pointer.ptr_len == PtrLenSingle &&
- // actual_type->data.pointer.child_type->id == TypeTableEntryIdArray &&
- // actual_type->data.pointer.alignment >= wanted_type->data.pointer.alignment &&
- // types_match_const_cast_only(ira, wanted_type->data.pointer.child_type,
- // actual_type->data.pointer.child_type->data.array.child_type, source_node,
- // !wanted_type->data.pointer.is_const).id == ConstCastResultIdOk)
- //{
- // return ir_resolve_ptr_of_array_to_unknown_len_ptr(ira, source_instr, value, wanted_type);
- //}
-
- //// *[N]T to []T
- //if (is_slice(wanted_type) &&
- // actual_type->id == TypeTableEntryIdPointer &&
- // actual_type->data.pointer.ptr_len == PtrLenSingle &&
- // actual_type->data.pointer.child_type->id == TypeTableEntryIdArray)
- //{
- // TypeTableEntry *slice_ptr_type = wanted_type->data.structure.fields[slice_ptr_index].type_entry;
- // assert(slice_ptr_type->id == TypeTableEntryIdPointer);
- // if (types_match_const_cast_only(ira, slice_ptr_type->data.pointer.child_type,
- // actual_type->data.pointer.child_type->data.array.child_type, source_node,
- // !slice_ptr_type->data.pointer.is_const).id == ConstCastResultIdOk)
- // {
- // return ir_resolve_ptr_of_array_to_slice(ira, source_instr, value, wanted_type);
- // }
- //}
-
- //// cast from T to ?T
- //// note that the *T to ?*T case is handled via the "ConstCastOnly" mechanism
- //if (wanted_type->id == TypeTableEntryIdOptional) {
- // TypeTableEntry *wanted_child_type = wanted_type->data.maybe.child_type;
- // if (types_match_const_cast_only(ira, wanted_child_type, actual_type, source_node,
- // false).id == ConstCastResultIdOk)
- // {
- // return ir_analyze_maybe_wrap(ira, source_instr, value, wanted_type);
- // } else if (actual_type->id == TypeTableEntryIdComptimeInt ||
- // actual_type->id == TypeTableEntryIdComptimeFloat)
- // {
- // if (ir_num_lit_fits_in_other_type(ira, value, wanted_child_type, true)) {
- // return ir_analyze_maybe_wrap(ira, source_instr, value, wanted_type);
- // } else {
- // return ira->codegen->invalid_instruction;
- // }
- // } else if (wanted_child_type->id == TypeTableEntryIdPointer &&
- // wanted_child_type->data.pointer.is_const &&
- // (actual_type->id == TypeTableEntryIdPointer || is_container(actual_type)))
- // {
- // IrInstruction *cast1 = ir_analyze_cast(ira, source_instr, wanted_child_type, value);
- // if (type_is_invalid(cast1->value.type))
- // return ira->codegen->invalid_instruction;
-
- // IrInstruction *cast2 = ir_analyze_cast(ira, source_instr, wanted_type, cast1);
- // if (type_is_invalid(cast2->value.type))
- // return ira->codegen->invalid_instruction;
-
- // return cast2;
- // }
- //}
-
- //// cast from null literal to maybe type
- //if (wanted_type->id == TypeTableEntryIdOptional &&
- // actual_type->id == TypeTableEntryIdNull)
- //{
- // return ir_analyze_null_to_maybe(ira, source_instr, value, wanted_type);
- //}
-
- //// cast from child type of error type to error type
- //if (wanted_type->id == TypeTableEntryIdErrorUnion) {
- // if (types_match_const_cast_only(ira, wanted_type->data.error_union.payload_type, actual_type,
- // source_node, false).id == ConstCastResultIdOk)
- // {
- // return ir_analyze_err_wrap_payload(ira, source_instr, value, wanted_type);
- // } else if (actual_type->id == TypeTableEntryIdComptimeInt ||
- // actual_type->id == TypeTableEntryIdComptimeFloat)
- // {
- // if (ir_num_lit_fits_in_other_type(ira, value, wanted_type->data.error_union.payload_type, true)) {
- // return ir_analyze_err_wrap_payload(ira, source_instr, value, wanted_type);
- // } else {
- // return ira->codegen->invalid_instruction;
- // }
- // }
- //}
-
- //// cast from [N]T to E![]const T
- //if (wanted_type->id == TypeTableEntryIdErrorUnion &&
- // is_slice(wanted_type->data.error_union.payload_type) &&
- // actual_type->id == TypeTableEntryIdArray)
- //{
- // TypeTableEntry *ptr_type =
- // wanted_type->data.error_union.payload_type->data.structure.fields[slice_ptr_index].type_entry;
- // assert(ptr_type->id == TypeTableEntryIdPointer);
- // if ((ptr_type->data.pointer.is_const || actual_type->data.array.len == 0) &&
- // types_match_const_cast_only(ira, ptr_type->data.pointer.child_type, actual_type->data.array.child_type,
- // source_node, false).id == ConstCastResultIdOk)
- // {
- // IrInstruction *cast1 = ir_analyze_cast(ira, source_instr, wanted_type->data.error_union.payload_type, value);
- // if (type_is_invalid(cast1->value.type))
- // return ira->codegen->invalid_instruction;
-
- // IrInstruction *cast2 = ir_analyze_cast(ira, source_instr, wanted_type, cast1);
- // if (type_is_invalid(cast2->value.type))
- // return ira->codegen->invalid_instruction;
-
- // return cast2;
- // }
- //}
-
- //// cast from error set to error union type
- //if (wanted_type->id == TypeTableEntryIdErrorUnion &&
- // actual_type->id == TypeTableEntryIdErrorSet)
- //{
- // return ir_analyze_err_wrap_code(ira, source_instr, value, wanted_type);
- //}
-
- //// cast from T to E!?T
- //if (wanted_type->id == TypeTableEntryIdErrorUnion &&
- // wanted_type->data.error_union.payload_type->id == TypeTableEntryIdOptional &&
- // actual_type->id != TypeTableEntryIdOptional)
- //{
- // TypeTableEntry *wanted_child_type = wanted_type->data.error_union.payload_type->data.maybe.child_type;
- // if (types_match_const_cast_only(ira, wanted_child_type, actual_type, source_node, false).id == ConstCastResultIdOk ||
- // actual_type->id == TypeTableEntryIdNull ||
- // actual_type->id == TypeTableEntryIdComptimeInt ||
- // actual_type->id == TypeTableEntryIdComptimeFloat)
- // {
- // IrInstruction *cast1 = ir_analyze_cast(ira, source_instr, wanted_type->data.error_union.payload_type, value);
- // if (type_is_invalid(cast1->value.type))
- // return ira->codegen->invalid_instruction;
-
- // IrInstruction *cast2 = ir_analyze_cast(ira, source_instr, wanted_type, cast1);
- // if (type_is_invalid(cast2->value.type))
- // return ira->codegen->invalid_instruction;
-
- // return cast2;
- // }
- //}
-
- // cast from comptime-known integer to another integer where the value fits
- if (target.isCompTime() and (from_type.id == .Int or from_type.id == .ComptimeInt)) cast: {
- const target_val = target.val.KnownValue;
- const from_int = &target_val.cast(Value.Int).?.big_int;
- const fits = fits: {
- if (dest_type.cast(Type.ComptimeInt)) |ctint| {
- break :fits true;
- }
- if (dest_type.cast(Type.Int)) |int| {
- break :fits from_int.fitsInTwosComp(int.key.is_signed, int.key.bit_count);
- }
- break :cast;
- };
- if (!fits) {
- try ira.addCompileError(source_instr.span, "integer value '{}' cannot be stored in type '{}'", .{
- from_int,
- dest_type.name,
- });
- return error.SemanticAnalysisFailed;
- }
-
- const new_val = try target.copyVal(ira.irb.comp);
- new_val.setType(dest_type, ira.irb.comp);
- return ira.irb.buildConstValue(source_instr.scope, source_instr.span, new_val);
- }
-
- // cast from number literal to another type
- // cast from number literal to *const integer
- //if (actual_type->id == TypeTableEntryIdComptimeFloat ||
- // actual_type->id == TypeTableEntryIdComptimeInt)
- //{
- // ensure_complete_type(ira->codegen, wanted_type);
- // if (type_is_invalid(wanted_type))
- // return ira->codegen->invalid_instruction;
- // if (wanted_type->id == TypeTableEntryIdEnum) {
- // IrInstruction *cast1 = ir_analyze_cast(ira, source_instr, wanted_type->data.enumeration.tag_int_type, value);
- // if (type_is_invalid(cast1->value.type))
- // return ira->codegen->invalid_instruction;
-
- // IrInstruction *cast2 = ir_analyze_cast(ira, source_instr, wanted_type, cast1);
- // if (type_is_invalid(cast2->value.type))
- // return ira->codegen->invalid_instruction;
-
- // return cast2;
- // } else if (wanted_type->id == TypeTableEntryIdPointer &&
- // wanted_type->data.pointer.is_const)
- // {
- // IrInstruction *cast1 = ir_analyze_cast(ira, source_instr, wanted_type->data.pointer.child_type, value);
- // if (type_is_invalid(cast1->value.type))
- // return ira->codegen->invalid_instruction;
-
- // IrInstruction *cast2 = ir_analyze_cast(ira, source_instr, wanted_type, cast1);
- // if (type_is_invalid(cast2->value.type))
- // return ira->codegen->invalid_instruction;
-
- // return cast2;
- // } else if (ir_num_lit_fits_in_other_type(ira, value, wanted_type, true)) {
- // CastOp op;
- // if ((actual_type->id == TypeTableEntryIdComptimeFloat &&
- // wanted_type->id == TypeTableEntryIdFloat) ||
- // (actual_type->id == TypeTableEntryIdComptimeInt &&
- // wanted_type->id == TypeTableEntryIdInt))
- // {
- // op = CastOpNumLitToConcrete;
- // } else if (wanted_type->id == TypeTableEntryIdInt) {
- // op = CastOpFloatToInt;
- // } else if (wanted_type->id == TypeTableEntryIdFloat) {
- // op = CastOpIntToFloat;
- // } else {
- // zig_unreachable();
- // }
- // return ir_resolve_cast(ira, source_instr, value, wanted_type, op, false);
- // } else {
- // return ira->codegen->invalid_instruction;
- // }
- //}
-
- //// cast from typed number to integer or float literal.
- //// works when the number is known at compile time
- //if (instr_is_comptime(value) &&
- // ((actual_type->id == TypeTableEntryIdInt && wanted_type->id == TypeTableEntryIdComptimeInt) ||
- // (actual_type->id == TypeTableEntryIdFloat && wanted_type->id == TypeTableEntryIdComptimeFloat)))
- //{
- // return ir_analyze_number_to_literal(ira, source_instr, value, wanted_type);
- //}
-
- //// cast from union to the enum type of the union
- //if (actual_type->id == TypeTableEntryIdUnion && wanted_type->id == TypeTableEntryIdEnum) {
- // type_ensure_zero_bits_known(ira->codegen, actual_type);
- // if (type_is_invalid(actual_type))
- // return ira->codegen->invalid_instruction;
-
- // if (actual_type->data.unionation.tag_type == wanted_type) {
- // return ir_analyze_union_to_tag(ira, source_instr, value, wanted_type);
- // }
- //}
-
- //// enum to union which has the enum as the tag type
- //if (wanted_type->id == TypeTableEntryIdUnion && actual_type->id == TypeTableEntryIdEnum &&
- // (wanted_type->data.unionation.decl_node->data.container_decl.auto_enum ||
- // wanted_type->data.unionation.decl_node->data.container_decl.init_arg_expr != nullptr))
- //{
- // type_ensure_zero_bits_known(ira->codegen, wanted_type);
- // if (wanted_type->data.unionation.tag_type == actual_type) {
- // return ir_analyze_enum_to_union(ira, source_instr, value, wanted_type);
- // }
- //}
-
- //// enum to &const union which has the enum as the tag type
- //if (actual_type->id == TypeTableEntryIdEnum && wanted_type->id == TypeTableEntryIdPointer) {
- // TypeTableEntry *union_type = wanted_type->data.pointer.child_type;
- // if (union_type->data.unionation.decl_node->data.container_decl.auto_enum ||
- // union_type->data.unionation.decl_node->data.container_decl.init_arg_expr != nullptr)
- // {
- // type_ensure_zero_bits_known(ira->codegen, union_type);
- // if (union_type->data.unionation.tag_type == actual_type) {
- // IrInstruction *cast1 = ir_analyze_cast(ira, source_instr, union_type, value);
- // if (type_is_invalid(cast1->value.type))
- // return ira->codegen->invalid_instruction;
-
- // IrInstruction *cast2 = ir_analyze_cast(ira, source_instr, wanted_type, cast1);
- // if (type_is_invalid(cast2->value.type))
- // return ira->codegen->invalid_instruction;
-
- // return cast2;
- // }
- // }
- //}
-
- //// cast from *T to *[1]T
- //if (wanted_type->id == TypeTableEntryIdPointer && wanted_type->data.pointer.ptr_len == PtrLenSingle &&
- // actual_type->id == TypeTableEntryIdPointer && actual_type->data.pointer.ptr_len == PtrLenSingle)
- //{
- // TypeTableEntry *array_type = wanted_type->data.pointer.child_type;
- // if (array_type->id == TypeTableEntryIdArray && array_type->data.array.len == 1 &&
- // types_match_const_cast_only(ira, array_type->data.array.child_type,
- // actual_type->data.pointer.child_type, source_node,
- // !wanted_type->data.pointer.is_const).id == ConstCastResultIdOk)
- // {
- // if (wanted_type->data.pointer.alignment > actual_type->data.pointer.alignment) {
- // ErrorMsg *msg = ir_add_error(ira, source_instr, buf_sprintf("cast increases pointer alignment"));
- // add_error_note(ira->codegen, msg, value->source_node,
- // buf_sprintf("'%s' has alignment %" PRIu32, buf_ptr(&actual_type->name),
- // actual_type->data.pointer.alignment));
- // add_error_note(ira->codegen, msg, source_instr->source_node,
- // buf_sprintf("'%s' has alignment %" PRIu32, buf_ptr(&wanted_type->name),
- // wanted_type->data.pointer.alignment));
- // return ira->codegen->invalid_instruction;
- // }
- // return ir_analyze_ptr_to_array(ira, source_instr, value, wanted_type);
- // }
- //}
-
- //// cast from T to *T where T is zero bits
- //if (wanted_type->id == TypeTableEntryIdPointer && wanted_type->data.pointer.ptr_len == PtrLenSingle &&
- // types_match_const_cast_only(ira, wanted_type->data.pointer.child_type,
- // actual_type, source_node, !wanted_type->data.pointer.is_const).id == ConstCastResultIdOk)
- //{
- // type_ensure_zero_bits_known(ira->codegen, actual_type);
- // if (type_is_invalid(actual_type)) {
- // return ira->codegen->invalid_instruction;
- // }
- // if (!type_has_bits(actual_type)) {
- // return ir_get_ref(ira, source_instr, value, false, false);
- // }
- //}
-
- //// cast from undefined to anything
- //if (actual_type->id == TypeTableEntryIdUndefined) {
- // return ir_analyze_undefined_to_anything(ira, source_instr, value, wanted_type);
- //}
-
- //// cast from something to const pointer of it
- //if (!type_requires_comptime(actual_type)) {
- // TypeTableEntry *const_ptr_actual = get_pointer_to_type(ira->codegen, actual_type, true);
- // if (types_match_const_cast_only(ira, wanted_type, const_ptr_actual, source_node, false).id == ConstCastResultIdOk) {
- // return ir_analyze_cast_ref(ira, source_instr, value, wanted_type);
- // }
- //}
-
- try ira.addCompileError(source_instr.span, "expected type '{}', found '{}'", .{
- dest_type.name,
- from_type.name,
- });
- //ErrorMsg *parent_msg = ir_add_error_node(ira, source_instr->source_node,
- // buf_sprintf("expected type '%s', found '%s'",
- // buf_ptr(&wanted_type->name),
- // buf_ptr(&actual_type->name)));
- //report_recursive_error(ira, source_instr->source_node, &const_cast_result, parent_msg);
- return error.SemanticAnalysisFailed;
- }
-
- fn getCompTimeValOrNullUndefOk(self: *Analyze, target: *Inst) ?*Value {
- @panic("TODO");
- }
-
- fn getCompTimeRef(
- self: *Analyze,
- value: *Value,
- ptr_mut: Value.Ptr.Mut,
- mut: Type.Pointer.Mut,
- volatility: Type.Pointer.Vol,
- ) Analyze.Error!*Inst {
- return error.Unimplemented;
- }
-};
-
-pub fn gen(
- comp: *Compilation,
- body_node: *ast.Node,
- tree_scope: *Scope.AstTree,
- scope: *Scope,
-) !*Code {
- var irb = try Builder.init(comp, tree_scope, scope);
- errdefer irb.abort();
-
- const entry_block = try irb.createBasicBlock(scope, "Entry");
- entry_block.ref(&irb); // Entry block gets a reference because we enter it to begin.
- try irb.setCursorAtEndAndAppendBlock(entry_block);
-
- const result = try irb.genNode(body_node, scope, .None);
- if (!result.isNoReturn()) {
- // no need for save_err_ret_addr because this cannot return error
- _ = try irb.genAsyncReturn(scope, Span.token(body_node.lastToken()), result, true);
- }
-
- return irb.finish();
-}
-
-pub fn analyze(comp: *Compilation, old_code: *Code, expected_type: ?*Type) !*Code {
- const old_entry_bb = old_code.basic_block_list.at(0);
-
- var ira = try Analyze.init(comp, old_code.tree_scope, expected_type);
- errdefer ira.abort();
-
- const new_entry_bb = try ira.getNewBasicBlock(old_entry_bb, null);
- new_entry_bb.ref(&ira.irb);
-
- ira.irb.current_basic_block = new_entry_bb;
-
- ira.startBasicBlock(old_entry_bb, null);
-
- while (ira.old_bb_index < old_code.basic_block_list.len) {
- const old_instruction = ira.parent_basic_block.instruction_list.at(ira.instruction_index);
-
- if (old_instruction.ref_count == 0 and !old_instruction.hasSideEffects()) {
- ira.instruction_index += 1;
- continue;
- }
-
- const return_inst = try old_instruction.analyze(&ira);
- assert(return_inst.val != IrVal.Unknown); // at least the type should be known at this point
- return_inst.linkToParent(old_instruction);
- // Note: if we ever modify the above to handle error.CompileError by continuing analysis,
- // then here we want to check if ira.isCompTime() and return early if true
-
- if (return_inst.isNoReturn()) {
- try ira.finishBasicBlock(old_code);
- continue;
- }
-
- ira.instruction_index += 1;
- }
-
- if (ira.src_implicit_return_type_list.len == 0) {
- ira.irb.code.return_type = &Type.NoReturn.get(comp).base;
- return ira.irb.finish();
- }
-
- ira.irb.code.return_type = try ira.resolvePeerTypes(expected_type, ira.src_implicit_return_type_list.span());
- return ira.irb.finish();
+ return .{ .line = line, .column = column };
}
src-self-hosted/value.zig
@@ -1,587 +1,86 @@
const std = @import("std");
-const Scope = @import("scope.zig").Scope;
-const Compilation = @import("compilation.zig").Compilation;
-const ObjectFile = @import("codegen.zig").ObjectFile;
-const llvm = @import("llvm.zig");
-const ArrayListSentineled = std.ArrayListSentineled;
-const assert = std.debug.assert;
-/// Values are ref-counted, heap-allocated, and copy-on-write
-/// If there is only 1 ref then write need not copy
+/// This is the raw data, with no bookkeeping, no memory awareness,
+/// no de-duplication, and no type system awareness.
+/// It's important for this struct to be small.
+/// It is not copyable since it may contain references to its inner data.
pub const Value = struct {
- id: Id,
- typ: *Type,
- ref_count: std.atomic.Int(usize),
-
- /// Thread-safe
- pub fn ref(base: *Value) void {
- _ = base.ref_count.incr();
- }
-
- /// Thread-safe
- pub fn deref(base: *Value, comp: *Compilation) void {
- if (base.ref_count.decr() == 1) {
- base.typ.base.deref(comp);
- switch (base.id) {
- .Type => @fieldParentPtr(Type, "base", base).destroy(comp),
- .Fn => @fieldParentPtr(Fn, "base", base).destroy(comp),
- .FnProto => @fieldParentPtr(FnProto, "base", base).destroy(comp),
- .Void => @fieldParentPtr(Void, "base", base).destroy(comp),
- .Bool => @fieldParentPtr(Bool, "base", base).destroy(comp),
- .NoReturn => @fieldParentPtr(NoReturn, "base", base).destroy(comp),
- .Ptr => @fieldParentPtr(Ptr, "base", base).destroy(comp),
- .Int => @fieldParentPtr(Int, "base", base).destroy(comp),
- .Array => @fieldParentPtr(Array, "base", base).destroy(comp),
- }
- }
- }
-
- pub fn setType(base: *Value, new_type: *Type, comp: *Compilation) void {
- base.typ.base.deref(comp);
- new_type.base.ref();
- base.typ = new_type;
- }
-
- pub fn getRef(base: *Value) *Value {
- base.ref();
- return base;
- }
-
- pub fn cast(base: *Value, comptime T: type) ?*T {
- if (base.id != @field(Id, @typeName(T))) return null;
- return @fieldParentPtr(T, "base", base);
- }
-
- pub fn dump(base: *const Value) void {
- std.debug.warn("{}", .{@tagName(base.id)});
- }
-
- pub fn getLlvmConst(base: *Value, ofile: *ObjectFile) (error{OutOfMemory}!?*llvm.Value) {
- switch (base.id) {
- .Type => unreachable,
- .Fn => return @fieldParentPtr(Fn, "base", base).getLlvmConst(ofile),
- .FnProto => return @fieldParentPtr(FnProto, "base", base).getLlvmConst(ofile),
- .Void => return null,
- .Bool => return @fieldParentPtr(Bool, "base", base).getLlvmConst(ofile),
- .NoReturn => unreachable,
- .Ptr => return @fieldParentPtr(Ptr, "base", base).getLlvmConst(ofile),
- .Int => return @fieldParentPtr(Int, "base", base).getLlvmConst(ofile),
- .Array => return @fieldParentPtr(Array, "base", base).getLlvmConst(ofile),
- }
- }
-
- pub fn derefAndCopy(self: *Value, comp: *Compilation) (error{OutOfMemory}!*Value) {
- if (self.ref_count.get() == 1) {
- // ( อกยฐ อส อกยฐ)
- return self;
- }
-
- assert(self.ref_count.decr() != 1);
- return self.copy(comp);
- }
-
- pub fn copy(base: *Value, comp: *Compilation) (error{OutOfMemory}!*Value) {
- switch (base.id) {
- .Type => unreachable,
- .Fn => unreachable,
- .FnProto => unreachable,
- .Void => unreachable,
- .Bool => unreachable,
- .NoReturn => unreachable,
- .Ptr => unreachable,
- .Array => unreachable,
- .Int => return &(try @fieldParentPtr(Int, "base", base).copy(comp)).base,
- }
- }
-
- pub const Parent = union(enum) {
- None,
- BaseStruct: BaseStruct,
- BaseArray: BaseArray,
- BaseUnion: *Value,
- BaseScalar: *Value,
-
- pub const BaseStruct = struct {
- val: *Value,
- field_index: usize,
- };
-
- pub const BaseArray = struct {
- val: *Value,
- elem_index: usize,
- };
+ tag: Tag,
+
+ pub const Tag = enum {
+ void_type,
+ noreturn_type,
+ bool_type,
+ usize_type,
+
+ void_value,
+ noreturn_value,
+ bool_true,
+ bool_false,
+
+ array_sentinel_0_u8_type,
+ single_const_ptr_type,
+
+ int_u64,
+ int_i64,
+ function,
+ ref,
+ bytes,
};
- pub const Id = enum {
- Type,
- Fn,
- Void,
- Bool,
- NoReturn,
- Array,
- Ptr,
- Int,
- FnProto,
+ pub const Int_u64 = struct {
+ base: Value = Value{ .tag = .int_u64 },
+ int: u64,
};
- pub const Type = @import("type.zig").Type;
-
- pub const FnProto = struct {
- base: Value,
-
- /// The main external name that is used in the .o file.
- /// TODO https://github.com/ziglang/zig/issues/265
- symbol_name: ArrayListSentineled(u8, 0),
-
- pub fn create(comp: *Compilation, fn_type: *Type.Fn, symbol_name: ArrayListSentineled(u8, 0)) !*FnProto {
- const self = try comp.gpa().create(FnProto);
- self.* = FnProto{
- .base = Value{
- .id = .FnProto,
- .typ = &fn_type.base,
- .ref_count = std.atomic.Int(usize).init(1),
- },
- .symbol_name = symbol_name,
- };
- fn_type.base.base.ref();
- return self;
- }
-
- pub fn destroy(self: *FnProto, comp: *Compilation) void {
- self.symbol_name.deinit();
- comp.gpa().destroy(self);
- }
-
- pub fn getLlvmConst(self: *FnProto, ofile: *ObjectFile) !?*llvm.Value {
- const llvm_fn_type = try self.base.typ.getLlvmType(ofile.arena, ofile.context);
- const llvm_fn = llvm.AddFunction(
- ofile.module,
- self.symbol_name.span(),
- llvm_fn_type,
- ) orelse return error.OutOfMemory;
-
- // TODO port more logic from codegen.cpp:fn_llvm_value
-
- return llvm_fn;
- }
+ pub const Int_i64 = struct {
+ base: Value = Value{ .tag = .int_i64 },
+ int: i64,
};
- pub const Fn = struct {
- base: Value,
-
- /// The main external name that is used in the .o file.
- /// TODO https://github.com/ziglang/zig/issues/265
- symbol_name: ArrayListSentineled(u8, 0),
-
- /// parent should be the top level decls or container decls
- fndef_scope: *Scope.FnDef,
-
- /// parent is scope for last parameter
- child_scope: *Scope,
-
- /// parent is child_scope
- block_scope: ?*Scope.Block,
-
- /// Path to the object file that contains this function
- containing_object: ArrayListSentineled(u8, 0),
-
- link_set_node: *std.TailQueue(?*Value.Fn).Node,
-
- /// Creates a Fn value with 1 ref
- /// Takes ownership of symbol_name
- pub fn create(comp: *Compilation, fn_type: *Type.Fn, fndef_scope: *Scope.FnDef, symbol_name: ArrayListSentineled(u8, 0)) !*Fn {
- const link_set_node = try comp.gpa().create(Compilation.FnLinkSet.Node);
- link_set_node.* = Compilation.FnLinkSet.Node{
- .data = null,
- .next = undefined,
- .prev = undefined,
- };
- errdefer comp.gpa().destroy(link_set_node);
-
- const self = try comp.gpa().create(Fn);
- self.* = Fn{
- .base = Value{
- .id = .Fn,
- .typ = &fn_type.base,
- .ref_count = std.atomic.Int(usize).init(1),
- },
- .fndef_scope = fndef_scope,
- .child_scope = &fndef_scope.base,
- .block_scope = null,
- .symbol_name = symbol_name,
- .containing_object = ArrayListSentineled(u8, 0).initNull(comp.gpa()),
- .link_set_node = link_set_node,
- };
- fn_type.base.base.ref();
- fndef_scope.fn_val = self;
- fndef_scope.base.ref();
- return self;
- }
-
- pub fn destroy(self: *Fn, comp: *Compilation) void {
- // remove with a tombstone so that we do not have to grab a lock
- if (self.link_set_node.data != null) {
- // it's now the job of the link step to find this tombstone and
- // deallocate it.
- self.link_set_node.data = null;
- } else {
- comp.gpa().destroy(self.link_set_node);
- }
-
- self.containing_object.deinit();
- self.fndef_scope.base.deref(comp);
- self.symbol_name.deinit();
- comp.gpa().destroy(self);
- }
-
- /// We know that the function definition will end up in an .o file somewhere.
- /// Here, all we have to do is generate a global prototype.
- /// TODO cache the prototype per ObjectFile
- pub fn getLlvmConst(self: *Fn, ofile: *ObjectFile) !?*llvm.Value {
- const llvm_fn_type = try self.base.typ.getLlvmType(ofile.arena, ofile.context);
- const llvm_fn = llvm.AddFunction(
- ofile.module,
- self.symbol_name.span(),
- llvm_fn_type,
- ) orelse return error.OutOfMemory;
-
- // TODO port more logic from codegen.cpp:fn_llvm_value
-
- return llvm_fn;
- }
+ pub const Function = struct {
+ base: Value = Value{ .tag = .function },
};
- pub const Void = struct {
- base: Value,
-
- pub fn get(comp: *Compilation) *Void {
- comp.void_value.base.ref();
- return comp.void_value;
- }
-
- pub fn destroy(self: *Void, comp: *Compilation) void {
- comp.gpa().destroy(self);
- }
+ pub const ArraySentinel0_u8_Type = struct {
+ base: Value = Value{ .tag = .array_sentinel_0_u8_type },
+ len: u64,
};
- pub const Bool = struct {
- base: Value,
- x: bool,
-
- pub fn get(comp: *Compilation, x: bool) *Bool {
- if (x) {
- comp.true_value.base.ref();
- return comp.true_value;
- } else {
- comp.false_value.base.ref();
- return comp.false_value;
- }
- }
-
- pub fn destroy(self: *Bool, comp: *Compilation) void {
- comp.gpa().destroy(self);
- }
-
- pub fn getLlvmConst(self: *Bool, ofile: *ObjectFile) !?*llvm.Value {
- const llvm_type = llvm.Int1TypeInContext(ofile.context) orelse return error.OutOfMemory;
- if (self.x) {
- return llvm.ConstAllOnes(llvm_type);
- } else {
- return llvm.ConstNull(llvm_type);
- }
- }
+ pub const SingleConstPtrType = struct {
+ base: Value = Value{ .tag = .single_const_ptr_type },
+ elem_type: *Value,
};
- pub const NoReturn = struct {
- base: Value,
-
- pub fn get(comp: *Compilation) *NoReturn {
- comp.noreturn_value.base.ref();
- return comp.noreturn_value;
- }
-
- pub fn destroy(self: *NoReturn, comp: *Compilation) void {
- comp.gpa().destroy(self);
- }
+ pub const Ref = struct {
+ base: Value = Value{ .tag = .ref },
+ pointee: *MemoryCell,
};
- pub const Ptr = struct {
- base: Value,
- special: Special,
- mut: Mut,
-
- pub const Mut = enum {
- CompTimeConst,
- CompTimeVar,
- RunTime,
- };
-
- pub const Special = union(enum) {
- Scalar: *Value,
- BaseArray: BaseArray,
- BaseStruct: BaseStruct,
- HardCodedAddr: u64,
- Discard,
- };
+ pub const Bytes = struct {
+ base: Value = Value{ .tag = .bytes },
+ data: []u8,
+ };
+};
- pub const BaseArray = struct {
- val: *Value,
- elem_index: usize,
- };
+pub const MemoryCell = struct {
+ parent: Parent,
+ contents: *Value,
- pub const BaseStruct = struct {
- val: *Value,
+ pub const Parent = union(enum) {
+ none,
+ struct_field: struct {
+ struct_base: *MemoryCell,
field_index: usize,
- };
-
- pub fn createArrayElemPtr(
- comp: *Compilation,
- array_val: *Array,
- mut: Type.Pointer.Mut,
- size: Type.Pointer.Size,
+ },
+ array_elem: struct {
+ array_base: *MemoryCell,
elem_index: usize,
- ) !*Ptr {
- array_val.base.ref();
- errdefer array_val.base.deref(comp);
-
- const elem_type = array_val.base.typ.cast(Type.Array).?.key.elem_type;
- const ptr_type = try Type.Pointer.get(comp, Type.Pointer.Key{
- .child_type = elem_type,
- .mut = mut,
- .vol = Type.Pointer.Vol.Non,
- .size = size,
- .alignment = .Abi,
- });
- var ptr_type_consumed = false;
- errdefer if (!ptr_type_consumed) ptr_type.base.base.deref(comp);
-
- const self = try comp.gpa().create(Value.Ptr);
- self.* = Value.Ptr{
- .base = Value{
- .id = .Ptr,
- .typ = &ptr_type.base,
- .ref_count = std.atomic.Int(usize).init(1),
- },
- .special = Special{
- .BaseArray = BaseArray{
- .val = &array_val.base,
- .elem_index = 0,
- },
- },
- .mut = Mut.CompTimeConst,
- };
- ptr_type_consumed = true;
- errdefer comp.gpa().destroy(self);
-
- return self;
- }
-
- pub fn destroy(self: *Ptr, comp: *Compilation) void {
- comp.gpa().destroy(self);
- }
-
- pub fn getLlvmConst(self: *Ptr, ofile: *ObjectFile) !?*llvm.Value {
- const llvm_type = self.base.typ.getLlvmType(ofile.arena, ofile.context);
- // TODO carefully port the logic from codegen.cpp:gen_const_val_ptr
- switch (self.special) {
- .Scalar => |scalar| @panic("TODO"),
- .BaseArray => |base_array| {
- // TODO put this in one .o file only, and after that, generate extern references to it
- const array_llvm_value = (try base_array.val.getLlvmConst(ofile)).?;
- const ptr_bit_count = ofile.comp.target_ptr_bits;
- const usize_llvm_type = llvm.IntTypeInContext(ofile.context, ptr_bit_count) orelse return error.OutOfMemory;
- var indices = [_]*llvm.Value{
- llvm.ConstNull(usize_llvm_type) orelse return error.OutOfMemory,
- llvm.ConstInt(usize_llvm_type, base_array.elem_index, 0) orelse return error.OutOfMemory,
- };
- return llvm.ConstInBoundsGEP(
- array_llvm_value,
- @ptrCast([*]*llvm.Value, &indices),
- @intCast(c_uint, indices.len),
- ) orelse return error.OutOfMemory;
- },
- .BaseStruct => |base_struct| @panic("TODO"),
- .HardCodedAddr => |addr| @panic("TODO"),
- .Discard => unreachable,
- }
- }
- };
-
- pub const Array = struct {
- base: Value,
- special: Special,
-
- pub const Special = union(enum) {
- Undefined,
- OwnedBuffer: []u8,
- Explicit: Data,
- };
-
- pub const Data = struct {
- parent: Parent,
- elements: []*Value,
- };
-
- /// Takes ownership of buffer
- pub fn createOwnedBuffer(comp: *Compilation, buffer: []u8) !*Array {
- const u8_type = Type.Int.get_u8(comp);
- defer u8_type.base.base.deref(comp);
-
- const array_type = try Type.Array.get(comp, Type.Array.Key{
- .elem_type = &u8_type.base,
- .len = buffer.len,
- });
- errdefer array_type.base.base.deref(comp);
-
- const self = try comp.gpa().create(Value.Array);
- self.* = Value.Array{
- .base = Value{
- .id = .Array,
- .typ = &array_type.base,
- .ref_count = std.atomic.Int(usize).init(1),
- },
- .special = Special{ .OwnedBuffer = buffer },
- };
- errdefer comp.gpa().destroy(self);
-
- return self;
- }
-
- pub fn destroy(self: *Array, comp: *Compilation) void {
- switch (self.special) {
- .Undefined => {},
- .OwnedBuffer => |buf| {
- comp.gpa().free(buf);
- },
- .Explicit => {},
- }
- comp.gpa().destroy(self);
- }
-
- pub fn getLlvmConst(self: *Array, ofile: *ObjectFile) !?*llvm.Value {
- switch (self.special) {
- .Undefined => {
- const llvm_type = try self.base.typ.getLlvmType(ofile.arena, ofile.context);
- return llvm.GetUndef(llvm_type);
- },
- .OwnedBuffer => |buf| {
- const dont_null_terminate = 1;
- const llvm_str_init = llvm.ConstStringInContext(
- ofile.context,
- buf.ptr,
- @intCast(c_uint, buf.len),
- dont_null_terminate,
- ) orelse return error.OutOfMemory;
- const str_init_type = llvm.TypeOf(llvm_str_init);
- const global = llvm.AddGlobal(ofile.module, str_init_type, "") orelse return error.OutOfMemory;
- llvm.SetInitializer(global, llvm_str_init);
- llvm.SetLinkage(global, llvm.PrivateLinkage);
- llvm.SetGlobalConstant(global, 1);
- llvm.SetUnnamedAddr(global, 1);
- llvm.SetAlignment(global, llvm.ABIAlignmentOfType(ofile.comp.target_data_ref, str_init_type));
- return global;
- },
- .Explicit => @panic("TODO"),
- }
-
- //{
- // 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);
- // LLVMTypeRef element_type_ref = type_entry->data.array.child_type->type_ref;
- // bool make_unnamed_struct = false;
- // for (uint64_t i = 0; i < len; i += 1) {
- // ConstExprValue *elem_value = &const_val->data.x_array.s_none.elements[i];
- // LLVMValueRef val = gen_const_val(g, elem_value, "");
- // values[i] = val;
- // make_unnamed_struct = make_unnamed_struct || is_llvm_value_unnamed_type(elem_value->type, val);
- // }
- // if (make_unnamed_struct) {
- // return LLVMConstStruct(values, len, true);
- // } else {
- // return LLVMConstArray(element_type_ref, values, (unsigned)len);
- // }
- //}
- }
- };
-
- pub const Int = struct {
- base: Value,
- big_int: std.math.big.Int,
-
- pub fn createFromString(comp: *Compilation, typ: *Type, base: u8, value: []const u8) !*Int {
- const self = try comp.gpa().create(Value.Int);
- self.* = Value.Int{
- .base = Value{
- .id = .Int,
- .typ = typ,
- .ref_count = std.atomic.Int(usize).init(1),
- },
- .big_int = undefined,
- };
- typ.base.ref();
- errdefer comp.gpa().destroy(self);
-
- self.big_int = try std.math.big.Int.init(comp.gpa());
- errdefer self.big_int.deinit();
-
- try self.big_int.setString(base, value);
-
- return self;
- }
-
- pub fn getLlvmConst(self: *Int, ofile: *ObjectFile) !?*llvm.Value {
- switch (self.base.typ.id) {
- .Int => {
- const type_ref = try self.base.typ.getLlvmType(ofile.arena, ofile.context);
- if (self.big_int.len() == 0) {
- return llvm.ConstNull(type_ref);
- }
- const unsigned_val = if (self.big_int.len() == 1) blk: {
- break :blk llvm.ConstInt(type_ref, self.big_int.limbs[0], @boolToInt(false));
- } else if (@sizeOf(std.math.big.Limb) == @sizeOf(u64)) blk: {
- break :blk llvm.ConstIntOfArbitraryPrecision(
- type_ref,
- @intCast(c_uint, self.big_int.len()),
- @ptrCast([*]u64, self.big_int.limbs.ptr),
- );
- } else {
- @compileError("std.math.Big.Int.Limb size does not match LLVM");
- };
- return if (self.big_int.isPositive()) unsigned_val else llvm.ConstNeg(unsigned_val);
- },
- .ComptimeInt => unreachable,
- else => unreachable,
- }
- }
-
- pub fn copy(old: *Int, comp: *Compilation) !*Int {
- old.base.typ.base.ref();
- errdefer old.base.typ.base.deref(comp);
-
- const new = try comp.gpa().create(Value.Int);
- new.* = Value.Int{
- .base = Value{
- .id = .Int,
- .typ = old.base.typ,
- .ref_count = std.atomic.Int(usize).init(1),
- },
- .big_int = undefined,
- };
- errdefer comp.gpa().destroy(new);
-
- new.big_int = try old.big_int.clone();
- errdefer new.big_int.deinit();
-
- return new;
- }
-
- pub fn destroy(self: *Int, comp: *Compilation) void {
- self.big_int.deinit();
- comp.gpa().destroy(self);
- }
+ },
+ union_field: *MemoryCell,
+ err_union_code: *MemoryCell,
+ err_union_payload: *MemoryCell,
+ optional_payload: *MemoryCell,
+ optional_flag: *MemoryCell,
};
};
test/stage2/ir.zig
@@ -0,0 +1,37 @@
+test "hello world IR" {
+ exeCmp(
+ \\@0 = "Hello, world!\n"
+ \\
+ \\@1 = fn({
+ \\ %0 : usize = 1 ;SYS_write
+ \\ %1 : usize = 1 ;STDOUT_FILENO
+ \\ %2 = ptrtoint(@0) ; msg ptr
+ \\ %3 = fieldptr(@0, "len") ; msg len ptr
+ \\ %4 = deref(%3) ; msg len
+ \\ %5 = asm("syscall",
+ \\ volatile=1,
+ \\ output="={rax}",
+ \\ inputs=["{rax}", "{rdi}", "{rsi}", "{rdx}"],
+ \\ clobbers=["rcx", "r11", "memory"],
+ \\ args=[%0, %1, %2, %4])
+ \\
+ \\ %6 : usize = 231 ;SYS_exit_group
+ \\ %7 : usize = 0 ;exit code
+ \\ %8 = asm("syscall",
+ \\ volatile=1,
+ \\ output="={rax}",
+ \\ inputs=["{rax}", "{rdi}"],
+ \\ clobbers=["rcx", "r11", "memory"],
+ \\ args=[%6, %7])
+ \\
+ \\ %9 = unreachable()
+ \\}, cc=naked);
+ \\
+ \\@2 = export("_start", @1)
+ ,
+ \\Hello, world!
+ \\
+ );
+}
+
+fn exeCmp(src: []const u8, expected_stdout: []const u8) void {}