2198 lines
109 KiB
Plaintext
2198 lines
109 KiB
Plaintext
import "@std/mem"
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import "@std/arraylist"
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import "@std/strconv"
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import "@ffi/c"
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import "@source/ast"
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import "@source/diagnostics"
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import "@source/ir"
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sema :: import "@source/sema"
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typecheck :: import "@source/sema/check"
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@hide:file
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StorageKind :: enum { none, function, global, local }
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@hide:file
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Storage :: struct {
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kind StorageKind = .none
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index u32 = 0
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}
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@hide:file
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LoopTargets :: struct {
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continue_target ir.BlockId
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exit ir.BlockId
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cleanup_depth usize
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}
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@hide:file
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State :: struct {
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tree @ast.Tree
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resolution @sema.Resolution
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checked @typecheck.Result
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diagnostics @mut diagnostics.Store
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module @mut ir.Module
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storage []mut Storage
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arrays []mut ir.ArrayId
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arguments arraylist.ArrayList(ir.ValueId)
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cleanups arraylist.ArrayList(ast.NodeId)
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records []mut ir.ArrayId
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function usize = 0
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block ir.BlockId = ir.BlockId(0)
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terminated bool = false
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loop ?LoopTargets = null
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return_type typecheck.Type = typecheck.Type{}
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fallthrough_block ?ast.NodeId = null
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fallthrough_diagnostic ?diagnostics.DiagnosticId = null
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}
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#! lowers checked source into caller-owned executable storage; release with ir.deinit.
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#! no frontend storage or source bytes are retained by the returned module.
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#! retains `allocator` in the module; temporary lowering storage is released before returning.
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lower proc(
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allocator mem.Allocator,
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tree @ast.Tree,
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resolution @sema.Resolution,
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checked @typecheck.Result,
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diagnostic_store @mut diagnostics.Store,
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) ir.Module ! (mem.AllocError | diagnostics.CapacityError) {
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return try lower_package(
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allocator,
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tree,
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resolution,
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checked,
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tree.root,
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diagnostic_store,
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)
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}
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#! lowers the module arena, selecting an entry only from `root_package`.
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#! retains `allocator` in the returned module; release it with ir.deinit; temporary lowering storage is released before returning.
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lower_package proc(
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allocator mem.Allocator,
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tree @ast.Tree,
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resolution @sema.Resolution,
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checked @typecheck.Result,
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root_package ast.NodeId,
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diagnostic_store @mut diagnostics.Store,
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) ir.Module ! (mem.AllocError | diagnostics.CapacityError) {
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return try lower_module(allocator, tree, resolution, checked, root_package, null, diagnostic_store)
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}
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#! lowers an isolated compile-time call wrapper without applying program entry-name rules.
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#! the caller supplies a checked parameterless function and owns the returned IR.
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#! retains `allocator` in the returned module; release it with ir.deinit; temporary lowering storage is released before returning.
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lower_evaluation proc(
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allocator mem.Allocator,
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tree @ast.Tree,
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resolution @sema.Resolution,
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checked @typecheck.Result,
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entry ast.NodeId,
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diagnostic_store @mut diagnostics.Store,
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) ir.Module ! (mem.AllocError | diagnostics.CapacityError) {
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return try lower_module(allocator, tree, resolution, checked, tree.root, entry, diagnostic_store)
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}
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@hide:file
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lower_module proc(
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allocator mem.Allocator,
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tree @ast.Tree,
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resolution @sema.Resolution,
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checked @typecheck.Result,
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root_package ast.NodeId,
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entry ?ast.NodeId,
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diagnostic_store @mut diagnostics.Store,
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) ir.Module ! (mem.AllocError | diagnostics.CapacityError) {
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module := ir.init(allocator)
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errdefer ir.deinit(&module)
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storage :: try mem.alloc(Storage, allocator, ast.node_count(tree))
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defer mem.free(allocator, storage)
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mem.set(storage, Storage{})
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arrays :: try mem.alloc(ir.ArrayId, allocator, typecheck.array_type_count(checked))
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defer mem.free(allocator, arrays)
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mem.set(arrays, ir.no_array)
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records :: try mem.alloc(ir.ArrayId, allocator, typecheck.record_type_count(checked))
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defer mem.free(allocator, records)
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mem.set(records, ir.no_array)
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state := State{
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tree = tree,
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resolution = resolution,
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checked = checked,
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diagnostics = diagnostic_store,
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module = &module,
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storage = storage,
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arrays = arrays,
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records = records,
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arguments = arraylist.init(ir.ValueId, allocator),
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cleanups = arraylist.init(ast.NodeId, allocator),
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}
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defer arraylist.deinit(&state.arguments)
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defer arraylist.deinit(&state.cleanups)
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# allocate every package identity before lowering any initializer or body.
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for (0..ast.package_decl_count(tree)) |i| {
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id :: ast.package_decl(tree, i)
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match ast.decl_kind(tree, id) {
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.function: {
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function :: try add_function(&module, ast.node_span(tree, id))
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storage[usize(id)] = Storage{ kind = .function, index = u32(function) }
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}
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.statement: {
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if (typecheck.type_of(checked, id).kind == .type_value) continue
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if (ast.expr_kind(tree, ast.statement_decl(tree, id).initializer) == .alias_expr) continue
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initializer :: try add_function(&module, ast.node_span(tree, id))
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global :: u32(module.globals.items.len)
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try arraylist.append(&module.globals, ir.Global{
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type = lower_type(&state, typecheck.type_of(checked, id)),
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array_type = try array_shape(&state, typecheck.type_of(checked, id)),
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initializer = initializer,
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span = ast.node_span(tree, id),
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})
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storage[usize(id)] = Storage{ kind = .global, index = global }
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}
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.import, .invalid: {}
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}
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}
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if (entry) |function| module.entry = ir.FunctionId(storage[usize(function)].index)
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else try find_entry(&state, root_package)
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for (0..ast.package_decl_count(tree)) |i| {
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id :: ast.package_decl(tree, i)
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match ast.decl_kind(tree, id) {
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.function: try lower_function(&state, id)
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.statement: {
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if (ast.expr_kind(tree, ast.statement_decl(tree, id).initializer) == .alias_expr) continue
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if (typecheck.type_of(checked, id).kind != .type_value) try lower_global(&state, id)
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}
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.import, .invalid: {}
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}
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}
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return module
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}
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@hide:file
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lower_type proc(state @State, type typecheck.Type) ir.Type {
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if (type.kind == .enumeration) return lower_type(state, typecheck.Type{ kind = typecheck.enum_type(state.checked, type.enum_type).backing })
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if (type.kind == .slice) return .record
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if (type.kind == .fallible) return .record
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if (type.kind == .optional) return lower_optional_type(state, typecheck.array_type(state.checked, type.array_type).element)
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return match type.kind {
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.int: .int
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.usize: .usize
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.i8: .i8
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.i16: .i16
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.i32: .i32
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.isize: .isize
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.u8: .u8
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.u16: .u16
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.u32: .u32
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.u64: .u64
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.array: .array
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.record: .record
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.pointer: .pointer
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.float: .float
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.bool: .bool
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.string: .string
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.void: .void
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.function: .function
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.enumeration: unreachable
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.none, .invalid, .range, .type_value, .null, .anyopaque: .invalid
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.slice, .optional, .fallible: unreachable
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}
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}
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@hide:file
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lower_optional_type proc(state @State, child typecheck.Type) ir.Type {
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if (child.kind == .pointer or child.kind == .function) return lower_type(state, child)
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return .record
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}
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@hide:file
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array_shape proc(state @mut State, type typecheck.Type) ir.ArrayId ! (mem.AllocError | diagnostics.CapacityError) {
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if (type.kind == .record) return try prepare_record(state, type.record_type)
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if (type.kind == .slice or type.kind == .optional or type.kind == .fallible) return try prepare_container(state, type)
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if (type.kind != .array) return ir.no_array
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# checker history includes unresolved shapes; materialize only final used types.
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return try prepare_array(state, type.array_type)
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}
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@hide:file
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prepare_array proc(state @mut State, id typecheck.ArrayId) ir.ArrayId ! (mem.AllocError | diagnostics.CapacityError) {
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if (state.arrays[usize(id)] != ir.no_array) return state.arrays[usize(id)]
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descriptor :: typecheck.array_type(state.checked, id)
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child := ir.no_array
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child = try array_shape(state, descriptor.element)
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result :: try ir.add_array(
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state.module,
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lower_type(state, descriptor.element),
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child,
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descriptor.len,
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descriptor.mutable,
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)
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state.arrays[usize(id)] = result
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return result
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}
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@hide:file
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prepare_container proc(state @mut State, type typecheck.Type) ir.ArrayId ! (mem.AllocError | diagnostics.CapacityError) {
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descriptor :: typecheck.array_type(state.checked, type.array_type)
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if (type.kind == .optional and (descriptor.element.kind == .pointer or descriptor.element.kind == .function)) return ir.no_array
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index :: usize(type.array_type)
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if (state.arrays[index] != ir.no_array) return state.arrays[index]
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if (type.kind == .fallible) {
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fields [2]ir.RecordField :: [
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{
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type = lower_type(state, descriptor.element),
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array_type = try array_shape(state, descriptor.element),
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tag = ir.Value{ type = .int, data = ir.ValueData{ integer = 0 } },
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},
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{
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type = lower_type(state, descriptor.error_type),
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array_type = try array_shape(state, descriptor.error_type),
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tag = ir.Value{ type = .int, data = ir.ValueData{ integer = 1 } },
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},
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]
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shape :: try ir.add_union(state.module, fields[..], true)
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state.arrays[index] = shape
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return shape
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}
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fields [2]mut ir.RecordField := [{ type = .pointer }, { type = .usize }]
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if (type.kind == .optional) {
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fields[0] = ir.RecordField{ type = .bool }
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fields[1] = ir.RecordField{ type = lower_type(state, descriptor.element), array_type = try array_shape(state, descriptor.element) }
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}
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shape :: try ir.add_record(state.module, fields[..])
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state.arrays[index] = shape
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return shape
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}
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@hide:file
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prepare_record proc(state @mut State, id typecheck.RecordId) ir.ArrayId ! (mem.AllocError | diagnostics.CapacityError) {
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if (state.records[usize(id)] != ir.no_array) return state.records[usize(id)]
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descriptor :: typecheck.record_type(state.checked, id)
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fields := arraylist.init(ir.RecordField, state.module.allocator)
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defer arraylist.deinit(&fields)
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try arraylist.reserve(&fields, descriptor.fields.len)
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for (descriptor.fields) |field| {
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tag := ir.Value{}
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if (descriptor.is_union and descriptor.tag_type.kind == .enumeration) {
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members :: typecheck.enum_type(state.checked, descriptor.tag_type.enum_type).members
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for members |member, index| {
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if (ast.name_id(state.tree, member.name) == ast.name_id(state.tree, field.name?)) {
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tag = enum_value(state, descriptor.tag_type, index)
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break
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}
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}
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}
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try arraylist.append(&fields, ir.RecordField{
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type = lower_type(state, field.type),
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array_type = try array_shape(state, field.type),
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tag = tag,
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})
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}
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shape :: if (descriptor.is_union) try ir.add_union(state.module, fields.items, descriptor.tag_type.kind == .enumeration)
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else try ir.add_record(state.module, fields.items)
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state.records[usize(id)] = shape
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return shape
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}
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@hide:file
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add_function proc(module @mut ir.Module, span diagnostics.Span) ir.FunctionId ! mem.AllocError {
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id :: ir.FunctionId(module.functions.items.len)
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try arraylist.append(&module.functions, ir.init_function(module.allocator))
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function := &module.functions.items[usize(id)]
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function.span = span
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try arraylist.append(&function.blocks, ir.init_block(module.allocator))
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return id
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}
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@hide:file
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find_entry proc(state @mut State, root_package ast.NodeId) void ! (mem.AllocError | diagnostics.CapacityError) {
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package_tree := state.tree^
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package_tree.root = root_package
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tree :: &package_tree
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for (0..ast.package_decl_count(tree)) |i| {
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id :: ast.package_decl(tree, i)
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name := diagnostics.Span{ start = 0, end = 0 }
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match ast.decl_kind(tree, id) {
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.function: name = ast.function_decl(tree, id).name
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.statement: name = ast.statement_decl(tree, id).name
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.import, .invalid: continue
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}
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if (!mem.eql(ast.source_text(tree, name), "main")) continue
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if (ast.decl_kind(tree, id) != .function) {
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state.module.entry_diagnostic = try diagnostics.add(state.diagnostics, .invalid_entry, name)
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return
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}
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declaration :: ast.function_decl(tree, id)
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result :: lower_type(state, typecheck.type_of(state.checked, declaration.return_type))
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if (ast.function_param_count(tree, id) != 0 or result == .function) {
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state.module.entry_diagnostic = try diagnostics.add(state.diagnostics, .invalid_entry, name)
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return
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}
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state.module.entry = ir.FunctionId(state.storage[usize(id)].index)
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return
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}
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state.module.entry_diagnostic = try diagnostics.add(
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state.diagnostics,
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.missing_entry,
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ast.node_span(tree, root_package),
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)
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}
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@hide:file
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trap proc(state @mut State, diagnostic diagnostics.DiagnosticId, span diagnostics.Span) void {
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state.module.functions.items[state.function].blocks.items[usize(state.block)].terminator = ir.Terminator{
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kind = .trap,
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diagnostic = diagnostic,
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span = span,
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}
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state.terminated = true
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}
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@hide:file
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trap_type proc(state @mut State, id ast.NodeId) bool {
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type :: typecheck.type_of(state.checked, id)
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if (type.kind != .invalid) return false
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trap(state, type.diagnostic, ast.node_span(state.tree, id))
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return true
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}
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@hide:file
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trap_binding proc(state @mut State, id ast.NodeId) bool {
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binding :: sema.binding(state.resolution, id)
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if (binding.kind != .invalid) return false
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trap(state, binding.data.diagnostic, ast.node_span(state.tree, id))
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return true
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}
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@hide:file
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finish proc(state @mut State, value ir.ValueId, span diagnostics.Span) void {
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state.module.functions.items[state.function].blocks.items[usize(state.block)].terminator = ir.Terminator{
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value = value,
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span = span,
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}
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state.terminated = true
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}
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@hide:file
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emit proc(state @mut State, instruction ir.Instruction) ir.ValueId ! (mem.AllocError | diagnostics.CapacityError) {
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return try ir.emit(state.module, ir.FunctionId(state.function), state.block, instruction)
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}
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@hide:file
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constant proc(state @mut State, value ir.Value, span diagnostics.Span) ir.ValueId ! (mem.AllocError | diagnostics.CapacityError) {
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return try emit(state, ir.Instruction{ op = .constant, type = value.type, constant = value, span = span })
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}
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@hide:file
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lower_global proc(state @mut State, id ast.NodeId) void ! (mem.AllocError | diagnostics.CapacityError) {
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global :: state.module.globals.items[usize(state.storage[usize(id)].index)]
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state.function = usize(global.initializer)
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state.block = ir.BlockId(0)
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state.terminated = false
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state.module.functions.items[state.function].result = global.type
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state.module.functions.items[state.function].result_array_type = global.array_type
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if (trap_binding(state, id)) return
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declaration :: ast.statement_decl(state.tree, id)
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if (declaration.type) |annotation| {
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if (trap_type(state, annotation)) return
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}
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value :: try lower_as(state, declaration.initializer, typecheck.type_of(state.checked, id))
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if (state.terminated or trap_type(state, id)) return
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finish(state, value, declaration.span)
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}
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|
|
@hide:file
|
|
lower_function proc(state @mut State, id ast.NodeId) void ! (mem.AllocError | diagnostics.CapacityError) {
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tree :: state.tree
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declaration :: ast.function_decl(tree, id)
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state.function = usize(state.storage[usize(id)].index)
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state.block = ir.BlockId(0)
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state.terminated = false
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state.loop = null
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state.fallthrough_block = declaration.body
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state.fallthrough_diagnostic = typecheck.fallthrough_diagnostic(state.checked, id)
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state.return_type = typecheck.type_of(state.checked, declaration.return_type)
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state.module.functions.items[state.function].result = lower_type(state, typecheck.type_of(state.checked, declaration.return_type))
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state.module.functions.items[state.function].result_array_type = try array_shape(state, typecheck.type_of(state.checked, declaration.return_type))
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state.module.functions.items[state.function].result_fallible = state.return_type.kind == .fallible
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for (0..ast.function_param_count(tree, id)) |i| {
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parameter :: ast.function_param(tree, id, i)
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type :: typecheck.type_of(state.checked, parameter)
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local :: try ir.add_parameter(
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state.module,
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ir.FunctionId(state.function),
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lower_type(state, type),
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try array_shape(state, type),
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)
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state.storage[usize(parameter)] = Storage{ kind = .local, index = u32(local) }
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}
|
|
if (ast.function_external(tree, id)) {
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if (trap_binding(state, id) or trap_type(state, id)) return
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|
name :: ast.source_text(tree, declaration.name)
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owned :: try mem.alloc(u8, state.module.allocator, name.len)
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memcopy!(owned, name)
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state.module.functions.items[state.function].external_name = owned
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return
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}
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|
try predeclare_locals(state, declaration.body)
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# signature errors are entry traps; body errors are reached in statement order.
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if (trap_binding(state, id) or trap_type(state, declaration.return_type)) return
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for (0..ast.function_param_count(tree, id)) |i| {
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if (trap_type(state, ast.function_param(tree, id, i))) return
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}
|
|
if (trap_type(state, id)) return
|
|
try lower_block(state, declaration.body, false)
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|
if (state.terminated) return
|
|
if (typecheck.fallthrough_diagnostic(state.checked, id)) |diagnostic| {
|
|
trap(state, diagnostic, ast.node_span(tree, declaration.body))
|
|
return
|
|
}
|
|
value := ir.no_value
|
|
if (state.return_type.kind == .fallible) value = try wrap_fallible(state, value, state.return_type, false, ast.node_span(tree, declaration.body))
|
|
finish(state, value, ast.node_span(tree, declaration.body))
|
|
}
|
|
|
|
@hide:file
|
|
predeclare_locals proc(state @mut State, block ast.NodeId) void ! (mem.AllocError | diagnostics.CapacityError) {
|
|
for (0..ast.block_statement_count(state.tree, block)) |i| {
|
|
statement :: ast.block_statement(state.tree, block, i)
|
|
match ast.stmt_kind(state.tree, statement) {
|
|
.declaration: {
|
|
if (typecheck.type_of(state.checked, statement).kind == .type_value) continue
|
|
if (ast.expr_kind(state.tree, ast.statement_decl(state.tree, statement).initializer) == .alias_expr) continue
|
|
type :: typecheck.type_of(state.checked, statement)
|
|
local :: try ir.add_local(
|
|
state.module,
|
|
ir.FunctionId(state.function),
|
|
lower_type(state, type),
|
|
try array_shape(state, type),
|
|
)
|
|
state.storage[usize(statement)] = Storage{ kind = .local, index = u32(local) }
|
|
}
|
|
.if_stmt: {
|
|
conditional :: ast.if_stmt(state.tree, statement)
|
|
if (conditional.capture) |capture| try predeclare_capture(state, capture)
|
|
try predeclare_locals(state, conditional.then_block)
|
|
if (conditional.else_block) |alternative| try predeclare_locals(state, alternative)
|
|
}
|
|
.while_stmt: {
|
|
loop :: ast.while_stmt(state.tree, statement)
|
|
if (loop.capture) |capture| try predeclare_capture(state, capture)
|
|
try predeclare_locals(state, loop.body)
|
|
}
|
|
.for_stmt: {
|
|
loop :: ast.for_stmt(state.tree, statement)
|
|
family :: typecheck.type_of(state.checked, loop.iterable).range_element
|
|
type :: lower_type(state, typecheck.Type{ kind = family })
|
|
slot :: try ir.add_local(state.module, ir.FunctionId(state.function), type, ir.no_array)
|
|
state.storage[usize(statement)] = Storage{ kind = .local, index = u32(slot) }
|
|
if (loop.capture) |capture| state.storage[usize(capture)] = state.storage[usize(statement)]
|
|
if (loop.index) |index| {
|
|
index_slot :: try ir.add_local(state.module, ir.FunctionId(state.function), .int, ir.no_array)
|
|
state.storage[usize(index)] = Storage{ kind = .local, index = u32(index_slot) }
|
|
}
|
|
try predeclare_locals(state, loop.body)
|
|
}
|
|
.block_stmt: try predeclare_locals(state, ast.statement_block(state.tree, statement))
|
|
.defer_stmt, .errdefer_stmt: {
|
|
cleanup :: ast.cleanup_stmt(state.tree, statement)
|
|
if (cleanup.capture) |capture| try predeclare_capture(state, capture)
|
|
try predeclare_locals(state, cleanup.body)
|
|
}
|
|
else: {}
|
|
}
|
|
}
|
|
}
|
|
|
|
@hide:file
|
|
predeclare_capture proc(state @mut State, capture ast.NodeId) void ! (mem.AllocError | diagnostics.CapacityError) {
|
|
type :: typecheck.type_of(state.checked, capture)
|
|
slot :: try ir.add_local(state.module, ir.FunctionId(state.function), lower_type(state, type), try array_shape(state, type))
|
|
state.storage[usize(capture)] = Storage{ kind = .local, index = u32(slot) }
|
|
}
|
|
|
|
@hide:file
|
|
store_capture proc(state @mut State, capture ast.NodeId, value ir.ValueId, optional_type typecheck.Type, span diagnostics.Span) void ! (mem.AllocError | diagnostics.CapacityError) {
|
|
payload :: try optional_payload(state, value, optional_type, span)
|
|
_ = try emit(state, ir.Instruction{ op = .store_local, left = payload, slot = state.storage[usize(capture)].index, span = span })
|
|
}
|
|
|
|
@hide:file
|
|
lower_block proc(state @mut State, block ast.NodeId, fresh_scope bool) void ! (mem.AllocError | diagnostics.CapacityError) {
|
|
cleanup_depth :: state.cleanups.items.len
|
|
defer state.cleanups.items = state.cleanups.items.ptr[..cleanup_depth]
|
|
# reset every direct declaration before control can return or trap within the scope.
|
|
if (fresh_scope) {
|
|
for (0..ast.block_statement_count(state.tree, block)) |i| {
|
|
declaration :: ast.block_statement(state.tree, block, i)
|
|
if (ast.stmt_kind(state.tree, declaration) != .declaration) continue
|
|
if (typecheck.type_of(state.checked, declaration).kind == .type_value) continue
|
|
if (ast.expr_kind(state.tree, ast.statement_decl(state.tree, declaration).initializer) == .alias_expr) continue
|
|
_ = try emit(state, ir.Instruction{
|
|
op = .reset_local,
|
|
slot = state.storage[usize(declaration)].index,
|
|
span = ast.node_span(state.tree, declaration),
|
|
})
|
|
}
|
|
}
|
|
for (0..ast.block_statement_count(state.tree, block)) |i| {
|
|
if (state.terminated) return
|
|
try lower_statement(state, ast.block_statement(state.tree, block, i))
|
|
}
|
|
if (!state.terminated) {
|
|
if (state.fallthrough_block) |function_body| {
|
|
if (function_body == block) {
|
|
if (state.fallthrough_diagnostic) |diagnostic| {
|
|
trap(state, diagnostic, ast.node_span(state.tree, block))
|
|
return
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (!state.terminated) try lower_cleanups(state, cleanup_depth, ir.no_value)
|
|
}
|
|
|
|
@hide:file
|
|
lower_cleanups proc(state @mut State, depth usize, error_value ir.ValueId) void ! (mem.AllocError | diagnostics.CapacityError) {
|
|
index := state.cleanups.items.len
|
|
while (index > depth) {
|
|
index -= 1
|
|
id :: state.cleanups.items[index]
|
|
if (ast.stmt_kind(state.tree, id) == .errdefer_stmt and error_value == ir.no_value) continue
|
|
cleanup :: ast.cleanup_stmt(state.tree, id)
|
|
if (cleanup.capture) |capture| _ = try emit(state, ir.Instruction{
|
|
op = .store_local, left = error_value, slot = state.storage[usize(capture)].index, span = cleanup.span,
|
|
})
|
|
try lower_block(state, cleanup.body, true)
|
|
if (state.terminated) return
|
|
}
|
|
}
|
|
|
|
@hide:file
|
|
wrap_fallible proc(state @mut State, value ir.ValueId, type typecheck.Type, failed bool, span diagnostics.Span) ir.ValueId ! (mem.AllocError | diagnostics.CapacityError) {
|
|
slot :: if (failed) u32(1) else u32(0)
|
|
shape :: try array_shape(state, type)
|
|
return try emit(state, ir.Instruction{
|
|
op = .union_literal, type = .record, array_type = shape, slot = slot,
|
|
left = value, constant = state.module.arrays.items[usize(shape)].fields[usize(slot)].tag, span = span,
|
|
})
|
|
}
|
|
|
|
@hide:file
|
|
fallible_failed proc(state @mut State, value ir.ValueId, span diagnostics.Span) ir.ValueId ! (mem.AllocError | diagnostics.CapacityError) {
|
|
tag :: try emit(state, ir.Instruction{ op = .union_tag, type = .int, left = value, span = span })
|
|
error_tag :: try constant(state, ir.Value{ type = .int, data = ir.ValueData{ integer = 1 } }, span)
|
|
return try emit(state, ir.Instruction{ op = .equal, type = .bool, left = tag, right = error_tag, span = span })
|
|
}
|
|
|
|
@hide:file
|
|
lower_return proc(state @mut State, value ir.ValueId, span diagnostics.Span) void ! (mem.AllocError | diagnostics.CapacityError) {
|
|
if (state.return_type.kind != .fallible) {
|
|
try lower_cleanups(state, 0, ir.no_value)
|
|
if (!state.terminated) finish(state, value, span)
|
|
return
|
|
}
|
|
failed :: try fallible_failed(state, value, span)
|
|
success :: try add_block(state)
|
|
failure :: try add_block(state)
|
|
state.module.functions.items[state.function].blocks.items[usize(state.block)].terminator = ir.Terminator{
|
|
kind = .branch, value = failed, target = failure, alternative = success, span = span,
|
|
}
|
|
state.block = failure
|
|
error_type :: typecheck.array_type(state.checked, state.return_type.array_type).error_type
|
|
error_value :: try project(state, value, lower_type(state, error_type), try array_shape(state, error_type), 1, span)
|
|
try lower_cleanups(state, 0, error_value)
|
|
if (!state.terminated) finish(state, value, span)
|
|
state.block = success
|
|
state.terminated = false
|
|
try lower_cleanups(state, 0, ir.no_value)
|
|
if (!state.terminated) finish(state, value, span)
|
|
}
|
|
|
|
@hide:file
|
|
add_block proc(state @mut State) ir.BlockId ! mem.AllocError {
|
|
function := &state.module.functions.items[state.function]
|
|
id :: ir.BlockId(function.blocks.items.len)
|
|
try arraylist.append(&function.blocks, ir.init_block(state.module.allocator))
|
|
return id
|
|
}
|
|
|
|
@hide:file
|
|
lower_if proc(state @mut State, id ast.NodeId) void ! (mem.AllocError | diagnostics.CapacityError) {
|
|
conditional :: ast.if_stmt(state.tree, id)
|
|
value :: try lower_expression(state, conditional.condition)
|
|
if (state.terminated) return
|
|
condition := value
|
|
if (conditional.capture != null) condition = try optional_present(state, value, typecheck.type_of(state.checked, conditional.condition), conditional.span)
|
|
origin :: state.block
|
|
consequent :: try add_block(state)
|
|
alternative :: try add_block(state)
|
|
state.module.functions.items[state.function].blocks.items[usize(origin)].terminator = ir.Terminator{
|
|
kind = .branch,
|
|
value = condition,
|
|
target = consequent,
|
|
alternative = alternative,
|
|
span = ast.node_span(state.tree, conditional.condition),
|
|
}
|
|
state.block = consequent
|
|
if (conditional.capture) |capture| try store_capture(state, capture, value, typecheck.type_of(state.checked, conditional.condition), conditional.span)
|
|
try lower_block(state, conditional.then_block, true)
|
|
consequent_end :: state.block
|
|
consequent_falls :: !state.terminated
|
|
state.block = alternative
|
|
state.terminated = false
|
|
if (conditional.else_block) |block| try lower_block(state, block, true)
|
|
alternative_end :: state.block
|
|
alternative_falls :: !state.terminated
|
|
if (!consequent_falls and !alternative_falls) {
|
|
state.terminated = true
|
|
return
|
|
}
|
|
join :: try add_block(state)
|
|
if (consequent_falls) {
|
|
state.module.functions.items[state.function].blocks.items[usize(consequent_end)].terminator = ir.Terminator{
|
|
kind = .jump, target = join, span = conditional.span,
|
|
}
|
|
}
|
|
if (alternative_falls) {
|
|
state.module.functions.items[state.function].blocks.items[usize(alternative_end)].terminator = ir.Terminator{
|
|
kind = .jump, target = join, span = conditional.span,
|
|
}
|
|
}
|
|
state.block = join
|
|
state.terminated = false
|
|
}
|
|
|
|
@hide:file
|
|
lower_while proc(state @mut State, id ast.NodeId) void ! (mem.AllocError | diagnostics.CapacityError) {
|
|
loop :: ast.while_stmt(state.tree, id)
|
|
origin :: state.block
|
|
guard :: try add_block(state)
|
|
state.module.functions.items[state.function].blocks.items[usize(origin)].terminator = ir.Terminator{
|
|
kind = .jump, target = guard, span = loop.span,
|
|
}
|
|
state.block = guard
|
|
value :: try lower_expression(state, loop.condition)
|
|
if (state.terminated) return
|
|
condition := value
|
|
if (loop.capture != null) condition = try optional_present(state, value, typecheck.type_of(state.checked, loop.condition), loop.span)
|
|
guard_end :: state.block
|
|
body :: try add_block(state)
|
|
exit :: try add_block(state)
|
|
state.module.functions.items[state.function].blocks.items[usize(guard_end)].terminator = ir.Terminator{
|
|
kind = .branch,
|
|
value = condition,
|
|
target = body,
|
|
alternative = exit,
|
|
span = ast.node_span(state.tree, loop.condition),
|
|
}
|
|
previous_loop :: state.loop
|
|
state.loop = LoopTargets{ continue_target = guard, exit = exit, cleanup_depth = state.cleanups.items.len }
|
|
defer state.loop = previous_loop
|
|
state.block = body
|
|
if (loop.capture) |capture| try store_capture(state, capture, value, typecheck.type_of(state.checked, loop.condition), loop.span)
|
|
try lower_block(state, loop.body, true)
|
|
if (!state.terminated) {
|
|
state.module.functions.items[state.function].blocks.items[usize(state.block)].terminator = ir.Terminator{
|
|
kind = .jump, target = guard, span = loop.span,
|
|
}
|
|
}
|
|
state.block = exit
|
|
state.terminated = false
|
|
}
|
|
|
|
@hide:file
|
|
lower_for proc(state @mut State, id ast.NodeId) void ! (mem.AllocError | diagnostics.CapacityError) {
|
|
loop :: ast.for_stmt(state.tree, id)
|
|
if (ast.expr_kind(state.tree, loop.iterable) != .range) {
|
|
_ = try lower_expression(state, loop.iterable)
|
|
if (!state.terminated) _ = trap_type(state, id)
|
|
return
|
|
}
|
|
interval :: ast.range_expr(state.tree, loop.iterable)
|
|
start :: try lower_expression(state, interval.start)
|
|
if (state.terminated) return
|
|
end :: try lower_expression(state, interval.end)
|
|
if (state.terminated or trap_type(state, loop.iterable) or trap_type(state, id)) return
|
|
slot :: state.storage[usize(id)].index
|
|
family :: lower_type(state, typecheck.Type{ kind = typecheck.type_of(state.checked, loop.iterable).range_element })
|
|
_ = try emit(state, ir.Instruction{ op = .store_local, type = family, left = start, slot = slot, span = interval.span })
|
|
origin :: state.block
|
|
condition :: try add_block(state)
|
|
body :: try add_block(state)
|
|
update :: try add_block(state)
|
|
increment :: try add_block(state)
|
|
exit :: try add_block(state)
|
|
state.module.functions.items[state.function].blocks.items[usize(origin)].terminator = ir.Terminator{
|
|
kind = .jump, target = condition, span = loop.span,
|
|
}
|
|
state.block = condition
|
|
current :: try emit(state, ir.Instruction{ op = .load_local, type = family, slot = slot, span = interval.span })
|
|
comparison ir.Op :: if (interval.inclusive) .less_equal else .less
|
|
condition_value :: try emit(state, ir.Instruction{ op = comparison, type = .bool, left = current, right = end, span = interval.span })
|
|
state.module.functions.items[state.function].blocks.items[usize(state.block)].terminator = ir.Terminator{
|
|
kind = .branch, value = condition_value, target = body, alternative = exit, span = interval.span,
|
|
}
|
|
previous_loop :: state.loop
|
|
state.loop = LoopTargets{ continue_target = update, exit = exit, cleanup_depth = state.cleanups.items.len }
|
|
defer state.loop = previous_loop
|
|
state.block = body
|
|
if (loop.capture) |capture| _ = trap_binding(state, capture)
|
|
if (!state.terminated) try lower_block(state, loop.body, true)
|
|
if (!state.terminated) {
|
|
state.module.functions.items[state.function].blocks.items[usize(state.block)].terminator = ir.Terminator{
|
|
kind = .jump, target = update, span = loop.span,
|
|
}
|
|
}
|
|
state.block = update
|
|
state.terminated = false
|
|
last :: try emit(state, ir.Instruction{ op = .load_local, type = family, slot = slot, span = interval.span })
|
|
finished :: try emit(state, ir.Instruction{ op = .equal, type = .bool, left = last, right = end, span = interval.span })
|
|
# continue reaches this guard too, so an inclusive maximum never adds one.
|
|
state.module.functions.items[state.function].blocks.items[usize(state.block)].terminator = ir.Terminator{
|
|
kind = .branch, value = finished, target = exit, alternative = increment, span = interval.span,
|
|
}
|
|
state.block = increment
|
|
unit := ir.Value{ type = family, data = ir.ValueData{ integer = 1 } }
|
|
if (ir.unsigned_integer(family)) unit.data = ir.ValueData{ unsigned = 1 }
|
|
one :: try constant(state, unit, interval.span)
|
|
next :: try emit(state, ir.Instruction{ op = .add, type = family, left = last, right = one, span = interval.span })
|
|
_ = try emit(state, ir.Instruction{ op = .store_local, type = family, left = next, slot = slot, span = interval.span })
|
|
state.module.functions.items[state.function].blocks.items[usize(state.block)].terminator = ir.Terminator{
|
|
kind = .jump, target = condition, span = loop.span,
|
|
}
|
|
state.block = exit
|
|
state.terminated = false
|
|
}
|
|
|
|
@hide:file
|
|
lower_statement proc(state @mut State, id ast.NodeId) void ! (mem.AllocError | diagnostics.CapacityError) {
|
|
tree :: state.tree
|
|
match ast.stmt_kind(tree, id) {
|
|
.block_stmt: try lower_block(state, ast.statement_block(tree, id), true)
|
|
.defer_stmt, .errdefer_stmt: {
|
|
if (trap_type(state, id)) return
|
|
try arraylist.append(&state.cleanups, id)
|
|
}
|
|
.if_stmt: try lower_if(state, id)
|
|
.while_stmt: try lower_while(state, id)
|
|
.for_stmt: try lower_for(state, id)
|
|
.break_stmt, .continue_stmt: {
|
|
if (trap_type(state, id)) return
|
|
if (state.loop) |targets| {
|
|
target := targets.exit
|
|
# each loop supplies its own guard or guarded-update entry.
|
|
if (ast.stmt_kind(tree, id) == .continue_stmt) target = targets.continue_target
|
|
try lower_cleanups(state, targets.cleanup_depth, ir.no_value)
|
|
if (state.terminated) return
|
|
state.module.functions.items[state.function].blocks.items[usize(state.block)].terminator = ir.Terminator{
|
|
kind = .jump, target = target, span = ast.node_span(tree, id),
|
|
}
|
|
state.terminated = true
|
|
} else unreachable
|
|
}
|
|
.assignment_stmt: {
|
|
assignment :: ast.assignment_stmt(tree, id)
|
|
if (
|
|
ast.expr_kind(tree, assignment.target) == .index
|
|
or ast.expr_kind(tree, assignment.target) == .unary
|
|
or (ast.expr_kind(tree, assignment.target) == .selection
|
|
and sema.binding(state.resolution, assignment.target).kind == .none)
|
|
) {
|
|
value :: try lower_as(state, assignment.value, typecheck.type_of(state.checked, assignment.target))
|
|
if (state.terminated) return
|
|
if (!is_place(state, assignment.target)) {
|
|
_ = try lower_expression(state, assignment.target)
|
|
if (!state.terminated) _ = trap_type(state, id)
|
|
return
|
|
}
|
|
address :: try lower_place(state, assignment.target)
|
|
if (state.terminated or trap_type(state, id)) return
|
|
_ = try emit(state, ir.Instruction{
|
|
op = .store_address,
|
|
type = .void,
|
|
left = address,
|
|
right = value,
|
|
span = ast.node_span(tree, assignment.target),
|
|
})
|
|
return
|
|
}
|
|
if (trap_binding(state, assignment.target) or trap_type(state, id)) return
|
|
value :: try lower_as(state, assignment.value, typecheck.type_of(state.checked, assignment.target))
|
|
if (state.terminated) return
|
|
binding :: sema.binding(state.resolution, assignment.target)
|
|
_ = try emit(state, ir.Instruction{
|
|
op = .assign_local,
|
|
type = lower_type(state, typecheck.type_of(state.checked, assignment.target)),
|
|
array_type = try array_shape(state, typecheck.type_of(state.checked, assignment.target)),
|
|
left = value,
|
|
slot = state.storage[usize(binding.data.declaration)].index,
|
|
span = ast.node_span(tree, assignment.target),
|
|
})
|
|
}
|
|
.invalid: {
|
|
invalid :: ast.invalid(tree, id)
|
|
trap(state, invalid.diagnostic, invalid.span)
|
|
}
|
|
.expression: _ = try lower_expression(state, ast.statement_expr(tree, id))
|
|
.declaration: {
|
|
if (typecheck.type_of(state.checked, id).kind == .type_value) return
|
|
if (ast.expr_kind(tree, ast.statement_decl(tree, id).initializer) == .alias_expr) return
|
|
if (trap_binding(state, id)) return
|
|
declaration :: ast.statement_decl(tree, id)
|
|
if (declaration.type) |annotation| {
|
|
if (trap_type(state, annotation)) return
|
|
}
|
|
value :: try lower_as(state, declaration.initializer, typecheck.type_of(state.checked, id))
|
|
if (state.terminated or trap_type(state, id)) return
|
|
_ = try emit(state, ir.Instruction{
|
|
op = .store_local,
|
|
type = lower_type(state, typecheck.type_of(state.checked, id)),
|
|
array_type = try array_shape(state, typecheck.type_of(state.checked, id)),
|
|
left = value,
|
|
slot = state.storage[usize(id)].index,
|
|
span = declaration.span,
|
|
})
|
|
}
|
|
.return_stmt: {
|
|
statement :: ast.return_stmt(tree, id)
|
|
value := ir.no_value
|
|
if (statement.value) |expression| value = try lower_as(state, expression, state.return_type)
|
|
if (state.terminated or trap_type(state, id)) return
|
|
if (statement.value == null and state.return_type.kind == .fallible) value = try wrap_fallible(state, value, state.return_type, false, statement.span)
|
|
try lower_return(state, value, statement.span)
|
|
}
|
|
}
|
|
}
|
|
|
|
@hide:file
|
|
lower_logical proc(state @mut State, id ast.NodeId) ir.ValueId ! (mem.AllocError | diagnostics.CapacityError) {
|
|
expression :: ast.binary_expr(state.tree, id)
|
|
span :: ast.node_span(state.tree, id)
|
|
left :: try lower_expression(state, expression.left)
|
|
if (state.terminated) return ir.no_value
|
|
origin :: state.block
|
|
slot :: u32(try ir.add_local(state.module, ir.FunctionId(state.function), .bool, ir.no_array))
|
|
right_block :: try add_block(state)
|
|
skip :: try add_block(state)
|
|
join :: try add_block(state)
|
|
conjunction :: expression.operator == .logical_and
|
|
target :: if (conjunction) right_block else skip
|
|
alternative :: if (conjunction) skip else right_block
|
|
state.module.functions.items[state.function].blocks.items[usize(origin)].terminator = ir.Terminator{
|
|
kind = .branch,
|
|
value = left,
|
|
target = target,
|
|
alternative = alternative,
|
|
span = ast.node_span(state.tree, expression.left),
|
|
}
|
|
state.block = skip
|
|
_ = try emit(state, ir.Instruction{ op = .store_local, type = .bool, left = left, slot = slot, span = span })
|
|
state.module.functions.items[state.function].blocks.items[usize(state.block)].terminator = ir.Terminator{
|
|
kind = .jump, target = join, span = span,
|
|
}
|
|
state.block = right_block
|
|
right :: try lower_expression(state, expression.right)
|
|
if (!state.terminated) {
|
|
_ = try emit(state, ir.Instruction{ op = .store_local, type = .bool, left = right, slot = slot, span = span })
|
|
state.module.functions.items[state.function].blocks.items[usize(state.block)].terminator = ir.Terminator{
|
|
kind = .jump, target = join, span = span,
|
|
}
|
|
}
|
|
# the skip edge reaches the join even when the demanded right edge traps.
|
|
state.block = join
|
|
state.terminated = false
|
|
if (trap_type(state, id)) return ir.no_value
|
|
return try emit(state, ir.Instruction{ op = .load_local, type = .bool, slot = slot, span = span })
|
|
}
|
|
|
|
@hide:file
|
|
enum_value proc(state @State, type typecheck.Type, index usize) ir.Value {
|
|
descriptor :: typecheck.enum_type(state.checked, type.enum_type)
|
|
member :: descriptor.members[index]
|
|
runtime :: lower_type(state, type)
|
|
if (ir.unsigned_integer(runtime)) return ir.Value{ type = runtime, data = ir.ValueData{ unsigned = member.magnitude } }
|
|
integer := i64(0)
|
|
if (member.negative) {
|
|
if (member.magnitude == u64(maxval!(i64)) + 1) integer = minval!(i64)
|
|
else integer = -i64(member.magnitude)
|
|
} else integer = i64(member.magnitude)
|
|
return ir.Value{ type = runtime, data = ir.ValueData{ integer = integer } }
|
|
}
|
|
|
|
@hide:file
|
|
match_condition proc(
|
|
state @mut State, subject ir.ValueId, pattern ast.NodeId,
|
|
) ir.ValueId ! (mem.AllocError | diagnostics.CapacityError) {
|
|
span :: ast.node_span(state.tree, pattern)
|
|
if (ast.expr_kind(state.tree, pattern) == .range) {
|
|
interval :: ast.range_expr(state.tree, pattern)
|
|
start :: try lower_expression(state, interval.start)
|
|
if (state.terminated) return ir.no_value
|
|
end :: try lower_expression(state, interval.end)
|
|
if (state.terminated) return ir.no_value
|
|
lower_bound :: try emit(state, ir.Instruction{ op = .greater_equal, type = .bool, left = subject, right = start, span = span })
|
|
upper_op :: if (interval.inclusive) ir.Op.less_equal else ir.Op.less
|
|
upper :: try emit(state, ir.Instruction{ op = upper_op, type = .bool, left = subject, right = end, span = span })
|
|
slot :: u32(try ir.add_local(state.module, ir.FunctionId(state.function), .bool, ir.no_array))
|
|
_ = try emit(state, ir.Instruction{ op = .store_local, left = lower_bound, slot = slot, span = span })
|
|
origin :: state.block
|
|
check_upper :: try add_block(state)
|
|
join :: try add_block(state)
|
|
state.module.functions.items[state.function].blocks.items[usize(origin)].terminator = ir.Terminator{
|
|
kind = .branch, value = lower_bound, target = check_upper, alternative = join, span = span,
|
|
}
|
|
state.block = check_upper
|
|
_ = try emit(state, ir.Instruction{ op = .store_local, left = upper, slot = slot, span = span })
|
|
state.module.functions.items[state.function].blocks.items[usize(state.block)].terminator = ir.Terminator{
|
|
kind = .jump, target = join, span = span,
|
|
}
|
|
state.block = join
|
|
return try emit(state, ir.Instruction{ op = .load_local, type = .bool, slot = slot, span = span })
|
|
}
|
|
value :: try lower_expression(state, pattern)
|
|
if (state.terminated) return ir.no_value
|
|
return try emit(state, ir.Instruction{ op = .equal, type = .bool, left = subject, right = value, span = span })
|
|
}
|
|
|
|
@hide:file
|
|
lower_match proc(state @mut State, id ast.NodeId) ir.ValueId ! (mem.AllocError | diagnostics.CapacityError) {
|
|
tree :: state.tree
|
|
span :: ast.node_span(tree, id)
|
|
view :: ast.match_expr(tree, id)
|
|
subject :: try lower_expression(state, view.subject)
|
|
if (state.terminated or trap_type(state, id)) return ir.no_value
|
|
subject_type :: typecheck.type_of(state.checked, view.subject)
|
|
tagged :: subject_type.kind == .record
|
|
discriminant := subject
|
|
if (tagged) {
|
|
tag_type :: typecheck.record_type(state.checked, subject_type.record_type).tag_type
|
|
discriminant = try emit(state, ir.Instruction{
|
|
op = .union_tag, type = lower_type(state, tag_type), left = subject, span = span,
|
|
})
|
|
}
|
|
type :: typecheck.type_of(state.checked, id)
|
|
runtime :: lower_type(state, type)
|
|
shape :: try array_shape(state, type)
|
|
result_slot := u32(0)
|
|
if (runtime != .void) result_slot = u32(try ir.add_local(state.module, ir.FunctionId(state.function), runtime, shape))
|
|
join :: try add_block(state)
|
|
falls := false
|
|
count :: ast.match_arm_count(tree, id)
|
|
for 0..count |i| {
|
|
arm :: ast.match_arm(tree, id, i)
|
|
arm_view :: ast.match_arm_view(tree, arm)
|
|
body :: try add_block(state)
|
|
if (arm_view.capture) |capture| {
|
|
capture_type :: typecheck.type_of(state.checked, capture)
|
|
local :: try ir.add_local(state.module, ir.FunctionId(state.function), lower_type(state, capture_type), try array_shape(state, capture_type))
|
|
state.storage[usize(capture)] = Storage{ kind = .local, index = u32(local) }
|
|
}
|
|
if (!arm_view.expression) try predeclare_locals(state, arm_view.body)
|
|
patterns :: ast.match_pattern_count(tree, arm)
|
|
if (arm_view.catch_all) {
|
|
state.module.functions.items[state.function].blocks.items[usize(state.block)].terminator = ir.Terminator{
|
|
kind = .jump, target = body, span = span,
|
|
}
|
|
} else {
|
|
for 0..patterns |j| {
|
|
pattern :: ast.match_pattern(tree, arm, j)
|
|
selected :: try add_block(state)
|
|
final :: i + 1 == count and j + 1 == patterns
|
|
next := join
|
|
if (!final) {
|
|
condition :: try match_condition(state, discriminant, pattern)
|
|
if (state.terminated) return ir.no_value
|
|
next = try add_block(state)
|
|
state.module.functions.items[state.function].blocks.items[usize(state.block)].terminator = ir.Terminator{
|
|
kind = .branch, value = condition, target = selected, alternative = next, span = ast.node_span(tree, pattern),
|
|
}
|
|
} else {
|
|
# checking proves exhaustiveness; the final pattern is the remaining case.
|
|
state.module.functions.items[state.function].blocks.items[usize(state.block)].terminator = ir.Terminator{
|
|
kind = .jump, target = selected, span = span,
|
|
}
|
|
}
|
|
state.block = selected
|
|
if (arm_view.capture) |capture| {
|
|
capture_type :: typecheck.type_of(state.checked, capture)
|
|
captured := subject
|
|
if (tagged) captured = try emit(state, ir.Instruction{
|
|
op = .field, type = lower_type(state, capture_type), array_type = try array_shape(state, capture_type),
|
|
left = subject, slot = u32(typecheck.union_variant_index(state.checked, pattern)), span = ast.node_span(tree, pattern),
|
|
})
|
|
_ = try emit(state, ir.Instruction{
|
|
op = .store_local, left = captured, slot = state.storage[usize(capture)].index, span = span,
|
|
})
|
|
}
|
|
state.module.functions.items[state.function].blocks.items[usize(state.block)].terminator = ir.Terminator{
|
|
kind = .jump, target = body, span = span,
|
|
}
|
|
state.block = next
|
|
}
|
|
}
|
|
next :: state.block
|
|
state.block = body
|
|
state.terminated = false
|
|
if (arm_view.expression) {
|
|
value :: try lower_as(state, arm_view.body, type)
|
|
if (!state.terminated and runtime != .void) _ = try emit(state, ir.Instruction{
|
|
op = .store_local, left = value, slot = result_slot, span = span,
|
|
})
|
|
} else try lower_block(state, arm_view.body, true)
|
|
if (!state.terminated) {
|
|
falls = true
|
|
state.module.functions.items[state.function].blocks.items[usize(state.block)].terminator = ir.Terminator{
|
|
kind = .jump, target = join, span = span,
|
|
}
|
|
}
|
|
state.block = next
|
|
state.terminated = false
|
|
}
|
|
state.block = join
|
|
state.terminated = !falls
|
|
if (!falls) state.module.functions.items[state.function].blocks.items[usize(join)].terminator = ir.Terminator{ kind = .unreachable }
|
|
if (!falls or runtime == .void) return ir.no_value
|
|
return try emit(state, ir.Instruction{
|
|
op = .load_local, type = runtime, array_type = shape, slot = result_slot, span = span,
|
|
})
|
|
}
|
|
|
|
@hide:file
|
|
lower_union proc(state @mut State, id ast.NodeId) ir.ValueId ! (mem.AllocError | diagnostics.CapacityError) {
|
|
tree :: state.tree
|
|
if (trap_type(state, id)) return ir.no_value
|
|
type :: typecheck.type_of(state.checked, id)
|
|
slot :: typecheck.union_variant_index(state.checked, id)
|
|
shape :: try array_shape(state, type)
|
|
field :: state.module.arrays.items[usize(shape)].fields[slot]
|
|
payload := ir.no_value
|
|
if (ast.expr_kind(tree, id) == .record_literal) {
|
|
view :: ast.record_literal(tree, id)
|
|
count :: ast.record_field_count(tree, id)
|
|
contextual := false
|
|
if (view.type) |annotation| contextual = ast.expr_kind(tree, annotation) == .enum_literal
|
|
if (contextual and field.type == .record and (count != 1 or ast.field(tree, ast.record_field(tree, id, 0)).name != null)) payload = try lower_record_as(state, id, typecheck.union_payload_type(state.checked, id))
|
|
else if (count != 0) payload = try lower_as(state, ast.field(tree, ast.record_field(tree, id, 0)).value?, typecheck.union_payload_type(state.checked, id))
|
|
}
|
|
if (state.terminated) return ir.no_value
|
|
return try emit(state, ir.Instruction{
|
|
op = .union_literal, type = .record, array_type = shape, slot = u32(slot),
|
|
left = payload, constant = field.tag, span = ast.node_span(tree, id),
|
|
})
|
|
}
|
|
|
|
@hide:file
|
|
lower_record_as proc(state @mut State, id ast.NodeId, type typecheck.Type) ir.ValueId ! (mem.AllocError | diagnostics.CapacityError) {
|
|
tree :: state.tree
|
|
scratch_start :: state.arguments.items.len
|
|
defer state.arguments.items = state.arguments.items.ptr[..scratch_start]
|
|
explicit_count :: ast.record_field_count(tree, id)
|
|
if (type.kind != .record) {
|
|
for (0..explicit_count) |i| {
|
|
_ = try lower_expression(state, ast.field(tree, ast.record_field(tree, id, i)).value?)
|
|
if (state.terminated) return ir.no_value
|
|
}
|
|
_ = trap_type(state, id)
|
|
return ir.no_value
|
|
}
|
|
descriptor :: typecheck.record_type(state.checked, type.record_type)
|
|
try arraylist.reserve(&state.arguments, scratch_start + explicit_count)
|
|
for (0..explicit_count) |_| try arraylist.append(&state.arguments, ir.no_value)
|
|
for (0..explicit_count) |i| {
|
|
initializer :: ast.field(tree, ast.record_field(tree, id, i)).value?
|
|
expected := typecheck.Type{}
|
|
for (descriptor.fields) |field, slot| {
|
|
if (typecheck.initializer_field(state.checked, id, slot) == initializer) {
|
|
expected = field.type
|
|
break
|
|
}
|
|
}
|
|
value :: try lower_as(state, initializer, expected)
|
|
if (state.terminated) return ir.no_value
|
|
state.arguments.items[scratch_start + i] = value
|
|
}
|
|
if (trap_type(state, id)) return ir.no_value
|
|
ordered_start :: state.arguments.items.len
|
|
try arraylist.reserve(&state.arguments, ordered_start + descriptor.fields.len)
|
|
for (descriptor.fields) |_| try arraylist.append(&state.arguments, ir.no_value)
|
|
for (0..(descriptor.fields.len)) |i| {
|
|
initializer :: typecheck.initializer_field(state.checked, id, i)
|
|
value := ir.no_value
|
|
# ponytail: quadratic field reorder; retain an inverse map if large records make lowering costly.
|
|
for (0..explicit_count) |j| {
|
|
if (ast.field(tree, ast.record_field(tree, id, j)).value? == initializer) {
|
|
value = state.arguments.items[scratch_start + j]
|
|
break
|
|
}
|
|
}
|
|
if (value == ir.no_value) value = try lower_as(state, initializer, descriptor.fields[i].type)
|
|
if (state.terminated) return ir.no_value
|
|
state.arguments.items[ordered_start + i] = value
|
|
}
|
|
block := &state.module.functions.items[state.function].blocks.items[usize(state.block)]
|
|
start :: block.arguments.items.len
|
|
try arraylist.reserve(&block.arguments, start + descriptor.fields.len)
|
|
for (0..(descriptor.fields.len)) |i| try arraylist.append(&block.arguments, state.arguments.items[ordered_start + i])
|
|
return try emit(state, ir.Instruction{
|
|
op = .record_literal,
|
|
type = .record,
|
|
array_type = try array_shape(state, type),
|
|
arguments_start = start,
|
|
arguments_count = descriptor.fields.len,
|
|
span = ast.node_span(tree, id),
|
|
})
|
|
}
|
|
|
|
@hide:file
|
|
is_place proc(state @State, id ast.NodeId) bool {
|
|
match ast.expr_kind(state.tree, id) {
|
|
.unary: {
|
|
expression :: ast.unary_expr(state.tree, id)
|
|
return expression.operator == .dereference
|
|
}
|
|
.index: {
|
|
base :: ast.index_expr(state.tree, id).base
|
|
kind :: typecheck.type_of(state.checked, base).kind
|
|
return kind == .pointer or kind == .slice or kind == .string or is_place(state, base)
|
|
}
|
|
.selection: {
|
|
if (sema.binding(state.resolution, id).kind == .none) {
|
|
base :: ast.selection_expr(state.tree, id).base
|
|
checked :: typecheck.type_of(state.checked, base)
|
|
if (checked.kind == .pointer) {
|
|
pointer :: typecheck.pointer_type(state.checked, checked.pointer_type)
|
|
return pointer.element.kind == .record
|
|
}
|
|
return is_place(state, base)
|
|
}
|
|
binding :: sema.binding(state.resolution, id)
|
|
if (binding.kind != .declaration) return false
|
|
location :: state.storage[usize(binding.data.declaration)]
|
|
return location.kind == .local or location.kind == .global
|
|
}
|
|
.identifier: {
|
|
binding :: sema.binding(state.resolution, id)
|
|
if (binding.kind == .invalid) return true
|
|
if (binding.kind != .declaration) return false
|
|
location :: state.storage[usize(binding.data.declaration)]
|
|
return location.kind == .local or location.kind == .global
|
|
}
|
|
else: return false
|
|
}
|
|
}
|
|
|
|
@hide:file
|
|
pointer_address proc(
|
|
state @mut State, pointer ir.ValueId, element typecheck.Type, span diagnostics.Span,
|
|
) ir.ValueId ! (mem.AllocError | diagnostics.CapacityError) {
|
|
return try emit(state, ir.Instruction{
|
|
op = .pointer_address, type = .address, left = pointer,
|
|
pointee = lower_type(state, element), array_type = try array_shape(state, element), span = span,
|
|
})
|
|
}
|
|
|
|
@hide:file
|
|
usize_constant proc(state @mut State, value usize, span diagnostics.Span) ir.ValueId ! (mem.AllocError | diagnostics.CapacityError) {
|
|
return try constant(state, ir.Value{ type = .usize, data = ir.ValueData{ unsigned = u64(value) } }, span)
|
|
}
|
|
|
|
@hide:file
|
|
null_constant proc(state @mut State, type ir.Type, span diagnostics.Span) ir.ValueId ! (mem.AllocError | diagnostics.CapacityError) {
|
|
return try constant(state, ir.Value{ type = type, data = ir.ValueData{ unsigned = maxval!(u64) } }, span)
|
|
}
|
|
|
|
@hide:file
|
|
record_pair proc(state @mut State, shape ir.ArrayId, first, second ir.ValueId, span diagnostics.Span) ir.ValueId ! (mem.AllocError | diagnostics.CapacityError) {
|
|
block :: &state.module.functions.items[state.function].blocks.items[usize(state.block)]
|
|
start :: block.arguments.items.len
|
|
try arraylist.append(&block.arguments, first)
|
|
try arraylist.append(&block.arguments, second)
|
|
return try emit(state, ir.Instruction{
|
|
op = .record_literal, type = .record, array_type = shape,
|
|
arguments_start = start, arguments_count = 2, span = span,
|
|
})
|
|
}
|
|
|
|
@hide:file
|
|
project proc(state @mut State, value ir.ValueId, type ir.Type, shape ir.ArrayId, slot u32, span diagnostics.Span) ir.ValueId ! (mem.AllocError | diagnostics.CapacityError) {
|
|
return try emit(state, ir.Instruction{ op = .field, type = type, array_type = shape, left = value, slot = slot, span = span })
|
|
}
|
|
|
|
@hide:file
|
|
optional_present proc(state @mut State, value ir.ValueId, type typecheck.Type, span diagnostics.Span) ir.ValueId ! (mem.AllocError | diagnostics.CapacityError) {
|
|
child :: typecheck.array_type(state.checked, type.array_type).element
|
|
runtime :: lower_type(state, child)
|
|
if (child.kind == .pointer or child.kind == .function) {
|
|
absent :: try null_constant(state, runtime, span)
|
|
return try emit(state, ir.Instruction{ op = .not_equal, type = .bool, left = value, right = absent, span = span })
|
|
}
|
|
return try project(state, value, .bool, ir.no_array, 0, span)
|
|
}
|
|
|
|
@hide:file
|
|
optional_payload proc(state @mut State, value ir.ValueId, type typecheck.Type, span diagnostics.Span) ir.ValueId ! (mem.AllocError | diagnostics.CapacityError) {
|
|
child :: typecheck.array_type(state.checked, type.array_type).element
|
|
runtime :: lower_type(state, child)
|
|
if (child.kind == .pointer or child.kind == .function) return value
|
|
return try project(state, value, runtime, try array_shape(state, child), 1, span)
|
|
}
|
|
|
|
@hide:file
|
|
zero_value proc(state @mut State, type ir.Type, shape ir.ArrayId, span diagnostics.Span) ir.ValueId ! (mem.AllocError | diagnostics.CapacityError) {
|
|
if (!ir.aggregate(type)) {
|
|
value := ir.Value{ type = type, data = ir.ValueData{ unsigned = 0 } }
|
|
if (type == .pointer or type == .function) value.data = ir.ValueData{ unsigned = maxval!(u64) }
|
|
return try constant(state, value, span)
|
|
}
|
|
descriptor :: state.module.arrays.items[usize(shape)]
|
|
if (descriptor.is_union) return try emit(state, ir.Instruction{ op = .union_literal, type = type, array_type = shape, span = span })
|
|
scratch :: state.arguments.items.len
|
|
defer state.arguments.items = state.arguments.items.ptr[..scratch]
|
|
count :: if (type == .array) descriptor.len else descriptor.fields.len
|
|
for (0..count) |_| try arraylist.append(&state.arguments, ir.no_value)
|
|
for (0..count) |i| {
|
|
child :: if (type == .array) descriptor.element else descriptor.fields[i].type
|
|
child_shape :: if (type == .array) descriptor.element_array else descriptor.fields[i].array_type
|
|
value :: try zero_value(state, child, child_shape, span)
|
|
state.arguments.items[scratch + i] = value
|
|
}
|
|
block :: &state.module.functions.items[state.function].blocks.items[usize(state.block)]
|
|
start :: block.arguments.items.len
|
|
for (0..count) |i| try arraylist.append(&block.arguments, state.arguments.items[scratch + i])
|
|
op ir.Op :: if (type == .array) .array_literal else .record_literal
|
|
return try emit(state, ir.Instruction{
|
|
op = op, type = type, array_type = shape,
|
|
arguments_start = start, arguments_count = count, span = span,
|
|
})
|
|
}
|
|
|
|
@hide:file
|
|
lower_as proc(state @mut State, id ast.NodeId, expected typecheck.Type) ir.ValueId ! (mem.AllocError | diagnostics.CapacityError) {
|
|
actual :: typecheck.type_of(state.checked, id)
|
|
span :: ast.node_span(state.tree, id)
|
|
if (actual.kind == .invalid or expected.kind == .invalid) return try lower_expression(state, id)
|
|
if (expected.kind == .fallible and actual.kind != .fallible) {
|
|
descriptor :: typecheck.array_type(state.checked, expected.array_type)
|
|
failed :: !typecheck.value_assignable(state.checked, actual, descriptor.element)
|
|
channel :: if (failed) descriptor.error_type else descriptor.element
|
|
payload :: try lower_as(state, id, channel)
|
|
if (state.terminated) return ir.no_value
|
|
return try wrap_fallible(state, payload, expected, failed, span)
|
|
}
|
|
if (expected.kind == .optional and actual.kind != .optional) {
|
|
child :: typecheck.array_type(state.checked, expected.array_type).element
|
|
runtime :: lower_type(state, child)
|
|
nullable :: child.kind == .pointer or child.kind == .function
|
|
if (actual.kind == .null and nullable) return try null_constant(state, runtime, span)
|
|
payload := ir.no_value
|
|
if (actual.kind == .null) payload = try zero_value(state, runtime, try array_shape(state, child), span)
|
|
else payload = try lower_as(state, id, child)
|
|
if (state.terminated or nullable) return payload
|
|
present :: try constant(state, ir.Value{ type = .bool, data = ir.ValueData{ boolean = actual.kind != .null } }, span)
|
|
return try record_pair(state, try array_shape(state, expected), present, payload, span)
|
|
}
|
|
if (expected.kind == .slice and actual.kind != .slice) {
|
|
parts :: try slice_parts(state, id)
|
|
if (state.terminated) return ir.no_value
|
|
return try record_pair(state, try array_shape(state, expected), parts.pointer, parts.bound, span)
|
|
}
|
|
value :: try lower_expression(state, id)
|
|
if (state.terminated) return ir.no_value
|
|
return try convert_value(state, value, actual, expected, span)
|
|
}
|
|
|
|
@hide:file
|
|
convert_value proc(state @mut State, value ir.ValueId, actual, expected typecheck.Type, span diagnostics.Span) ir.ValueId ! (mem.AllocError | diagnostics.CapacityError) {
|
|
if (actual.kind == .fallible and expected.kind == .fallible) {
|
|
if (actual.array_type == expected.array_type) return value
|
|
source :: typecheck.array_type(state.checked, actual.array_type)
|
|
destination :: typecheck.array_type(state.checked, expected.array_type)
|
|
shape :: try array_shape(state, expected)
|
|
slot :: u32(try ir.add_local(state.module, ir.FunctionId(state.function), .record, shape))
|
|
failed :: try fallible_failed(state, value, span)
|
|
success :: try add_block(state)
|
|
failure :: try add_block(state)
|
|
join :: try add_block(state)
|
|
state.module.functions.items[state.function].blocks.items[usize(state.block)].terminator = ir.Terminator{
|
|
kind = .branch, value = failed, target = failure, alternative = success, span = span,
|
|
}
|
|
for (0..2) |i| {
|
|
state.block = if (i == 0) success else failure
|
|
child :: if (i == 0) source.element else source.error_type
|
|
target :: if (i == 0) destination.element else destination.error_type
|
|
payload := ir.no_value
|
|
if (child.kind != .void) payload = try project(state, value, lower_type(state, child), try array_shape(state, child), u32(i), span)
|
|
converted :: try convert_value(state, payload, child, target, span)
|
|
wrapped :: try wrap_fallible(state, converted, expected, i == 1, span)
|
|
_ = try emit(state, ir.Instruction{ op = .store_local, left = wrapped, slot = slot, span = span })
|
|
state.module.functions.items[state.function].blocks.items[usize(state.block)].terminator = ir.Terminator{
|
|
kind = .jump, target = join, span = span,
|
|
}
|
|
}
|
|
state.block = join
|
|
return try emit(state, ir.Instruction{ op = .load_local, type = .record, array_type = shape, slot = slot, span = span })
|
|
}
|
|
if (expected.kind == .optional and actual.kind != .optional) {
|
|
child :: typecheck.array_type(state.checked, expected.array_type).element
|
|
runtime :: lower_type(state, child)
|
|
nullable :: child.kind == .pointer or child.kind == .function
|
|
if (actual.kind == .null and nullable) return try null_constant(state, runtime, span)
|
|
payload := ir.no_value
|
|
if (actual.kind == .null) payload = try zero_value(state, runtime, try array_shape(state, child), span)
|
|
else payload = try convert_value(state, value, actual, child, span)
|
|
if (nullable) return payload
|
|
present :: try constant(state, ir.Value{ type = .bool, data = ir.ValueData{ boolean = actual.kind != .null } }, span)
|
|
return try record_pair(state, try array_shape(state, expected), present, payload, span)
|
|
}
|
|
if (actual.kind == .optional and expected.kind == .optional and actual.array_type != expected.array_type) {
|
|
source :: typecheck.array_type(state.checked, actual.array_type).element
|
|
child :: typecheck.array_type(state.checked, expected.array_type).element
|
|
if (source.kind == .pointer or source.kind == .function) return value
|
|
shape :: try array_shape(state, expected)
|
|
slot :: u32(try ir.add_local(state.module, ir.FunctionId(state.function), .record, shape))
|
|
present :: try optional_present(state, value, actual, span)
|
|
some :: try add_block(state)
|
|
none :: try add_block(state)
|
|
join :: try add_block(state)
|
|
state.module.functions.items[state.function].blocks.items[usize(state.block)].terminator = ir.Terminator{
|
|
kind = .branch, value = present, target = some, alternative = none, span = span,
|
|
}
|
|
state.block = some
|
|
payload :: try optional_payload(state, value, actual, span)
|
|
converted :: try convert_value(state, payload, source, child, span)
|
|
wrapped :: try record_pair(state, shape, present, converted, span)
|
|
_ = try emit(state, ir.Instruction{ op = .store_local, left = wrapped, slot = slot, span = span })
|
|
state.module.functions.items[state.function].blocks.items[usize(state.block)].terminator = ir.Terminator{
|
|
kind = .jump, target = join, span = span,
|
|
}
|
|
state.block = none
|
|
absent :: try zero_value(state, .record, shape, span)
|
|
_ = try emit(state, ir.Instruction{ op = .store_local, left = absent, slot = slot, span = span })
|
|
state.module.functions.items[state.function].blocks.items[usize(state.block)].terminator = ir.Terminator{
|
|
kind = .jump, target = join, span = span,
|
|
}
|
|
state.block = join
|
|
return try emit(state, ir.Instruction{ op = .load_local, type = .record, array_type = shape, slot = slot, span = span })
|
|
}
|
|
if (expected.kind == .slice and actual.kind == .string) {
|
|
pointer :: try emit(state, ir.Instruction{ op = .string_pointer, type = .pointer, left = value, span = span })
|
|
length :: try emit(state, ir.Instruction{ op = .string_length, type = .usize, left = value, span = span })
|
|
return try record_pair(state, try array_shape(state, expected), pointer, length, span)
|
|
}
|
|
if (expected.kind == .slice and actual.kind == .array) {
|
|
source_shape :: try array_shape(state, actual)
|
|
slot :: u32(try ir.add_local(state.module, ir.FunctionId(state.function), .array, source_shape))
|
|
_ = try emit(state, ir.Instruction{ op = .store_local, left = value, slot = slot, span = span })
|
|
address :: try emit(state, ir.Instruction{
|
|
op = .address_local, type = .address, pointee = .array, array_type = source_shape, slot = slot, span = span,
|
|
})
|
|
pointer :: try emit(state, ir.Instruction{
|
|
op = .pointer_from_address, type = .pointer, left = address, pointee = .array, array_type = source_shape, span = span,
|
|
})
|
|
length :: try usize_constant(state, typecheck.array_type(state.checked, actual.array_type).len, span)
|
|
return try record_pair(state, try array_shape(state, expected), pointer, length, span)
|
|
}
|
|
if (
|
|
!typecheck.error_assignable(state.checked, actual, expected)
|
|
and !typecheck.error_assignable(state.checked, expected, actual)
|
|
) return value
|
|
source_union := false
|
|
if (actual.kind == .record) source_union = typecheck.record_type(state.checked, actual.record_type).is_union
|
|
if (expected.kind == .enumeration) {
|
|
if (!source_union) return value
|
|
return try emit(state, ir.Instruction{ op = .union_tag, type = lower_type(state, expected), left = value, span = span })
|
|
}
|
|
if (expected.kind != .record) return value
|
|
destination :: typecheck.record_type(state.checked, expected.record_type)
|
|
if (!destination.is_union) return value
|
|
if (actual.kind == .record and actual.record_type == expected.record_type) return value
|
|
shape :: try array_shape(state, expected)
|
|
if (actual.kind == .record and !source_union) {
|
|
for destination.fields |field, i| {
|
|
if (field.type.kind != .record or field.type.record_type != actual.record_type or field.type.nominal != actual.nominal) continue
|
|
return try emit(state, ir.Instruction{
|
|
op = .union_literal, type = .record, array_type = shape, slot = u32(i), left = value,
|
|
constant = state.module.arrays.items[usize(shape)].fields[i].tag, span = span,
|
|
})
|
|
}
|
|
unreachable
|
|
}
|
|
discriminant := value
|
|
source_shape := ir.no_array
|
|
if (source_union) {
|
|
source_shape = try array_shape(state, actual)
|
|
tag_type :: typecheck.record_type(state.checked, actual.record_type).tag_type
|
|
discriminant = try emit(state, ir.Instruction{ op = .union_tag, type = lower_type(state, tag_type), left = value, span = span })
|
|
}
|
|
slot :: u32(try ir.add_local(state.module, ir.FunctionId(state.function), .record, shape))
|
|
join :: try add_block(state)
|
|
for destination.fields |field, i| {
|
|
selected :: try add_block(state)
|
|
next :: try add_block(state)
|
|
tag :: state.module.arrays.items[usize(shape)].fields[i].tag
|
|
expected_tag :: try constant(state, tag, span)
|
|
condition :: try emit(state, ir.Instruction{ op = .equal, type = .bool, left = discriminant, right = expected_tag, span = span })
|
|
state.module.functions.items[state.function].blocks.items[usize(state.block)].terminator = ir.Terminator{
|
|
kind = .branch, value = condition, target = selected, alternative = next, span = span,
|
|
}
|
|
state.block = selected
|
|
payload := ir.no_value
|
|
if (source_union and field.type.kind != .void) {
|
|
source_fields :: state.module.arrays.items[usize(source_shape)].fields
|
|
for source_fields |source_field, j| {
|
|
if (source_field.tag.data.unsigned != tag.data.unsigned) continue
|
|
payload = try project(state, value, source_field.type, source_field.array_type, u32(j), span)
|
|
break
|
|
}
|
|
}
|
|
wrapped :: try emit(state, ir.Instruction{
|
|
op = .union_literal, type = .record, array_type = shape, slot = u32(i), left = payload, constant = tag, span = span,
|
|
})
|
|
_ = try emit(state, ir.Instruction{ op = .store_local, left = wrapped, slot = slot, span = span })
|
|
state.module.functions.items[state.function].blocks.items[usize(state.block)].terminator = ir.Terminator{
|
|
kind = .jump, target = join, span = span,
|
|
}
|
|
state.block = next
|
|
}
|
|
state.module.functions.items[state.function].blocks.items[usize(state.block)].terminator = ir.Terminator{ kind = .unreachable, span = span }
|
|
state.block = join
|
|
return try emit(state, ir.Instruction{ op = .load_local, type = .record, array_type = shape, slot = slot, span = span })
|
|
}
|
|
|
|
@hide:file
|
|
lower_try proc(state @mut State, id ast.NodeId) ir.ValueId ! (mem.AllocError | diagnostics.CapacityError) {
|
|
operand :: ast.type_operand(state.tree, id)
|
|
value :: try lower_expression(state, operand)
|
|
if (state.terminated or trap_type(state, id)) return ir.no_value
|
|
span :: ast.node_span(state.tree, id)
|
|
descriptor :: typecheck.array_type(state.checked, typecheck.type_of(state.checked, operand).array_type)
|
|
failed :: try fallible_failed(state, value, span)
|
|
success :: try add_block(state)
|
|
failure :: try add_block(state)
|
|
state.module.functions.items[state.function].blocks.items[usize(state.block)].terminator = ir.Terminator{
|
|
kind = .branch, value = failed, target = failure, alternative = success, span = span,
|
|
}
|
|
state.block = failure
|
|
payload :: try project(state, value, lower_type(state, descriptor.error_type), try array_shape(state, descriptor.error_type), 1, span)
|
|
target_error :: typecheck.array_type(state.checked, state.return_type.array_type).error_type
|
|
converted :: try convert_value(state, payload, descriptor.error_type, target_error, span)
|
|
result :: try wrap_fallible(state, converted, state.return_type, true, span)
|
|
try lower_cleanups(state, 0, converted)
|
|
if (!state.terminated) finish(state, result, span)
|
|
state.block = success
|
|
state.terminated = false
|
|
if (descriptor.element.kind == .void) return ir.no_value
|
|
return try project(state, value, lower_type(state, descriptor.element), try array_shape(state, descriptor.element), 0, span)
|
|
}
|
|
|
|
@hide:file
|
|
lower_catch proc(state @mut State, id ast.NodeId) ir.ValueId ! (mem.AllocError | diagnostics.CapacityError) {
|
|
expression :: ast.catch_expr(state.tree, id)
|
|
value :: try lower_expression(state, expression.operand)
|
|
if (state.terminated or trap_type(state, id)) return ir.no_value
|
|
span :: expression.span
|
|
descriptor :: typecheck.array_type(state.checked, typecheck.type_of(state.checked, expression.operand).array_type)
|
|
type :: typecheck.type_of(state.checked, id)
|
|
runtime :: lower_type(state, type)
|
|
shape :: try array_shape(state, type)
|
|
slot := u32(0)
|
|
if (runtime != .void) slot = u32(try ir.add_local(state.module, ir.FunctionId(state.function), runtime, shape))
|
|
failed :: try fallible_failed(state, value, span)
|
|
success :: try add_block(state)
|
|
failure :: try add_block(state)
|
|
join :: try add_block(state)
|
|
state.module.functions.items[state.function].blocks.items[usize(state.block)].terminator = ir.Terminator{
|
|
kind = .branch, value = failed, target = failure, alternative = success, span = span,
|
|
}
|
|
state.block = success
|
|
if (runtime != .void) {
|
|
payload :: try project(state, value, lower_type(state, descriptor.element), try array_shape(state, descriptor.element), 0, span)
|
|
converted :: try convert_value(state, payload, descriptor.element, type, span)
|
|
_ = try emit(state, ir.Instruction{ op = .store_local, left = converted, slot = slot, span = span })
|
|
}
|
|
state.module.functions.items[state.function].blocks.items[usize(state.block)].terminator = ir.Terminator{
|
|
kind = .jump, target = join, span = span,
|
|
}
|
|
state.block = failure
|
|
if (expression.capture) |capture| {
|
|
try predeclare_capture(state, capture)
|
|
payload :: try project(state, value, lower_type(state, descriptor.error_type), try array_shape(state, descriptor.error_type), 1, span)
|
|
_ = try emit(state, ir.Instruction{ op = .store_local, left = payload, slot = state.storage[usize(capture)].index, span = span })
|
|
}
|
|
if (!trap_type(state, expression.handler)) {
|
|
if (expression.handler_is_block) {
|
|
try predeclare_locals(state, expression.handler)
|
|
try lower_block(state, expression.handler, true)
|
|
} else {
|
|
fallback :: try lower_as(state, expression.handler, type)
|
|
if (!state.terminated and runtime != .void) _ = try emit(state, ir.Instruction{
|
|
op = .store_local, left = fallback, slot = slot, span = span,
|
|
})
|
|
}
|
|
}
|
|
if (!state.terminated) state.module.functions.items[state.function].blocks.items[usize(state.block)].terminator = ir.Terminator{
|
|
kind = .jump, target = join, span = span,
|
|
}
|
|
state.block = join
|
|
state.terminated = false
|
|
if (runtime == .void) return ir.no_value
|
|
return try emit(state, ir.Instruction{ op = .load_local, type = runtime, array_type = shape, slot = slot, span = span })
|
|
}
|
|
|
|
@hide:file
|
|
SliceParts :: struct {
|
|
pointer ir.ValueId
|
|
bound ir.ValueId
|
|
element typecheck.Type
|
|
}
|
|
|
|
@hide:file
|
|
borrow_expression proc(state @mut State, id ast.NodeId) ir.ValueId ! (mem.AllocError | diagnostics.CapacityError) {
|
|
if (is_place(state, id)) return try lower_place(state, id)
|
|
value :: try lower_expression(state, id)
|
|
if (state.terminated) return ir.no_value
|
|
checked :: typecheck.type_of(state.checked, id)
|
|
type :: lower_type(state, checked)
|
|
shape :: try array_shape(state, checked)
|
|
span :: ast.node_span(state.tree, id)
|
|
slot :: u32(try ir.add_local(state.module, ir.FunctionId(state.function), type, shape))
|
|
_ = try emit(state, ir.Instruction{ op = .store_local, type = type, array_type = shape, left = value, slot = slot, span = span })
|
|
return try emit(state, ir.Instruction{ op = .address_local, type = .address, pointee = type, array_type = shape, slot = slot, span = span })
|
|
}
|
|
|
|
@hide:file
|
|
slice_parts proc(state @mut State, id ast.NodeId) SliceParts ! (mem.AllocError | diagnostics.CapacityError) {
|
|
checked :: typecheck.type_of(state.checked, id)
|
|
span :: ast.node_span(state.tree, id)
|
|
result := SliceParts{ pointer = ir.no_value, bound = ir.no_value, element = typecheck.Type{} }
|
|
if (checked.kind == .slice) {
|
|
value :: try lower_expression(state, id)
|
|
if (state.terminated) return result
|
|
result.pointer = try project(state, value, .pointer, ir.no_array, 0, span)
|
|
result.bound = try project(state, value, .usize, ir.no_array, 1, span)
|
|
result.element = typecheck.array_type(state.checked, checked.array_type).element
|
|
return result
|
|
}
|
|
if (checked.kind == .string) {
|
|
value :: try lower_expression(state, id)
|
|
if (state.terminated) return result
|
|
result.pointer = try emit(state, ir.Instruction{ op = .string_pointer, type = .pointer, left = value, span = span })
|
|
result.bound = try emit(state, ir.Instruction{ op = .string_length, type = .usize, left = value, span = span })
|
|
result.element = typecheck.Type{ kind = .u8 }
|
|
return result
|
|
}
|
|
if (checked.kind == .pointer) {
|
|
descriptor :: typecheck.pointer_type(state.checked, checked.pointer_type)
|
|
result.pointer = try lower_expression(state, id)
|
|
if (state.terminated) return result
|
|
result.element = descriptor.element
|
|
if (!descriptor.many and descriptor.element.kind == .array) {
|
|
array :: typecheck.array_type(state.checked, descriptor.element.array_type)
|
|
result.element = array.element
|
|
result.bound = try usize_constant(state, array.len, span)
|
|
}
|
|
return result
|
|
}
|
|
if (checked.kind == .array) {
|
|
descriptor :: typecheck.array_type(state.checked, checked.array_type)
|
|
address :: try borrow_expression(state, id)
|
|
if (state.terminated) return result
|
|
result.pointer = try emit(state, ir.Instruction{
|
|
op = .pointer_from_address, type = .pointer, left = address,
|
|
pointee = .array, array_type = try array_shape(state, checked), span = span,
|
|
})
|
|
result.bound = try usize_constant(state, descriptor.len, span)
|
|
result.element = descriptor.element
|
|
return result
|
|
}
|
|
_ = try lower_expression(state, id)
|
|
return result
|
|
}
|
|
|
|
@hide:file
|
|
lower_slice proc(state @mut State, id ast.NodeId) ir.ValueId ! (mem.AllocError | diagnostics.CapacityError) {
|
|
expression :: ast.slice_expr(state.tree, id)
|
|
span :: ast.node_span(state.tree, id)
|
|
parts :: try slice_parts(state, expression.base)
|
|
if (state.terminated) return ir.no_value
|
|
start := ir.no_value
|
|
if (expression.start) |node| start = try lower_expression(state, node)
|
|
else start = try usize_constant(state, 0, span)
|
|
if (state.terminated) return ir.no_value
|
|
end := parts.bound
|
|
if (expression.end) |node| end = try lower_expression(state, node)
|
|
if (state.terminated or trap_type(state, id)) return ir.no_value
|
|
_ = try emit(state, ir.Instruction{ op = .slice_check, left = start, right = end, extra = parts.bound, span = span })
|
|
child :: parts.element
|
|
runtime :: lower_type(state, child)
|
|
shape :: try array_shape(state, child)
|
|
if (expression.sentinel) |node| {
|
|
sentinel :: try lower_as(state, node, child)
|
|
if (state.terminated) return ir.no_value
|
|
base_type :: typecheck.type_of(state.checked, expression.base)
|
|
has_sentinel := base_type.kind == .string
|
|
if (base_type.kind == .slice) has_sentinel = typecheck.array_type(state.checked, base_type.array_type).sentinel != null
|
|
if (parts.bound != ir.no_value and !has_sentinel) {
|
|
one :: try usize_constant(state, 1, span)
|
|
through :: try emit(state, ir.Instruction{ op = .add, type = .usize, left = end, right = one, span = span })
|
|
_ = try emit(state, ir.Instruction{ op = .slice_check, left = end, right = through, extra = parts.bound, span = span })
|
|
}
|
|
pointer :: try emit(state, ir.Instruction{ op = .pointer_offset, type = .pointer, left = parts.pointer, right = end, pointee = runtime, array_type = shape, span = span })
|
|
_ = try emit(state, ir.Instruction{ op = .sentinel_check, left = pointer, right = sentinel, pointee = runtime, array_type = shape, span = span })
|
|
}
|
|
pointer :: try emit(state, ir.Instruction{ op = .pointer_offset, type = .pointer, left = parts.pointer, right = start, pointee = runtime, array_type = shape, span = span })
|
|
length :: try emit(state, ir.Instruction{ op = .subtract, type = .usize, left = end, right = start, span = span })
|
|
return try record_pair(state, try array_shape(state, typecheck.type_of(state.checked, id)), pointer, length, span)
|
|
}
|
|
|
|
@hide:file
|
|
lower_builtin proc(state @mut State, id ast.NodeId) ir.ValueId ! (mem.AllocError | diagnostics.CapacityError) {
|
|
tree :: state.tree
|
|
span :: ast.node_span(tree, id)
|
|
name :: ast.source_text(tree, ast.node_span(tree, ast.builtin_call(tree, id).name))
|
|
if (trap_type(state, id)) return ir.no_value
|
|
if (mem.eql(name, "sizeof") or mem.eql(name, "alignof")) {
|
|
checked :: typecheck.type_of(state.checked, ast.call_arg(tree, id, 0))
|
|
type :: lower_type(state, checked)
|
|
shape :: try array_shape(state, checked)
|
|
size :: if (mem.eql(name, "sizeof")) ir.storage_size(state.module, type, shape) else ir.storage_alignment(state.module, type, shape)
|
|
return try usize_constant(state, size, span)
|
|
}
|
|
if (mem.eql(name, "ptrcast") or mem.eql(name, "constcast")) {
|
|
operand :: ast.call_arg(tree, id, ast.call_arg_count(tree, id) - 1)
|
|
value :: try lower_expression(state, operand)
|
|
if (state.terminated or trap_type(state, id)) return ir.no_value
|
|
type :: typecheck.type_of(state.checked, id)
|
|
if (lower_type(state, type) == .record) return value
|
|
return try emit(state, ir.Instruction{ op = .pointer_cast, type = lower_type(state, type), left = value, span = span })
|
|
}
|
|
if (mem.eql(name, "memcopy") or mem.eql(name, "memset")) {
|
|
destination :: try slice_parts(state, ast.call_arg(tree, id, 0))
|
|
if (state.terminated) return ir.no_value
|
|
source := SliceParts{ pointer = ir.no_value, bound = ir.no_value, element = typecheck.Type{} }
|
|
value := ir.no_value
|
|
if (mem.eql(name, "memcopy")) source = try slice_parts(state, ast.call_arg(tree, id, 1))
|
|
else value = try lower_as(state, ast.call_arg(tree, id, 1), destination.element)
|
|
if (state.terminated or trap_type(state, id)) return ir.no_value
|
|
if (mem.eql(name, "memcopy")) {
|
|
zero :: try usize_constant(state, 0, span)
|
|
_ = try emit(state, ir.Instruction{ op = .slice_check, left = zero, right = source.bound, extra = destination.bound, span = span })
|
|
_ = try emit(state, ir.Instruction{ op = .slice_check, left = zero, right = destination.bound, extra = source.bound, span = span })
|
|
value = source.pointer
|
|
}
|
|
op ir.Op :: if (mem.eql(name, "memcopy")) .memory_copy else .memory_set
|
|
_ = try emit(state, ir.Instruction{
|
|
op = op,
|
|
left = destination.pointer, right = value, extra = destination.bound,
|
|
pointee = lower_type(state, destination.element), array_type = try array_shape(state, destination.element), span = span,
|
|
})
|
|
return ir.no_value
|
|
}
|
|
if (!trap_type(state, id)) trap(state, try diagnostics.add(state.diagnostics, .invalid_operand, span), span)
|
|
return ir.no_value
|
|
}
|
|
|
|
@hide:file
|
|
lower_place proc(state @mut State, id ast.NodeId) ir.ValueId ! (mem.AllocError | diagnostics.CapacityError) {
|
|
span :: ast.node_span(state.tree, id)
|
|
checked :: typecheck.type_of(state.checked, id)
|
|
if (ast.expr_kind(state.tree, id) == .unary) {
|
|
expression :: ast.unary_expr(state.tree, id)
|
|
pointer :: try lower_expression(state, expression.operand)
|
|
if (state.terminated or trap_type(state, id)) return ir.no_value
|
|
return try pointer_address(state, pointer, checked, span)
|
|
}
|
|
if (
|
|
ast.expr_kind(state.tree, id) == .selection
|
|
and sema.binding(state.resolution, id).kind == .none
|
|
) {
|
|
expression :: ast.selection_expr(state.tree, id)
|
|
base_type :: typecheck.type_of(state.checked, expression.base)
|
|
base := ir.no_value
|
|
if (base_type.kind == .pointer) {
|
|
pointer :: try lower_expression(state, expression.base)
|
|
if (state.terminated or trap_type(state, id)) return ir.no_value
|
|
element :: typecheck.pointer_type(state.checked, base_type.pointer_type).element
|
|
base = try pointer_address(state, pointer, element, span)
|
|
} else base = try lower_place(state, expression.base)
|
|
if (state.terminated or trap_type(state, id)) return ir.no_value
|
|
return try emit(state, ir.Instruction{
|
|
op = .field_address,
|
|
type = .address,
|
|
pointee = lower_type(state, checked),
|
|
array_type = try array_shape(state, checked),
|
|
left = base,
|
|
slot = u32(typecheck.field_index(state.checked, id)),
|
|
span = span,
|
|
})
|
|
}
|
|
if (ast.expr_kind(state.tree, id) == .index) {
|
|
expression :: ast.index_expr(state.tree, id)
|
|
base_type :: typecheck.type_of(state.checked, expression.base)
|
|
if (base_type.kind == .slice or base_type.kind == .string) {
|
|
parts :: try slice_parts(state, expression.base)
|
|
if (state.terminated) return ir.no_value
|
|
index :: try lower_expression(state, expression.index)
|
|
if (state.terminated or trap_type(state, id)) return ir.no_value
|
|
one :: try usize_constant(state, 1, span)
|
|
end :: try emit(state, ir.Instruction{ op = .add, type = .usize, left = index, right = one, span = span })
|
|
_ = try emit(state, ir.Instruction{ op = .slice_check, left = index, right = end, extra = parts.bound, span = span })
|
|
pointer :: try emit(state, ir.Instruction{
|
|
op = .pointer_offset, type = .pointer, left = parts.pointer, right = index,
|
|
pointee = lower_type(state, checked), array_type = try array_shape(state, checked), span = span,
|
|
})
|
|
return try pointer_address(state, pointer, checked, span)
|
|
}
|
|
base := ir.no_value
|
|
if (base_type.kind == .pointer) {
|
|
pointer :: try lower_expression(state, expression.base)
|
|
if (state.terminated or trap_type(state, id)) return ir.no_value
|
|
descriptor :: typecheck.pointer_type(state.checked, base_type.pointer_type)
|
|
if (descriptor.many) {
|
|
index :: try lower_expression(state, expression.index)
|
|
if (state.terminated) return ir.no_value
|
|
offset :: try emit(state, ir.Instruction{
|
|
op = .pointer_offset, type = .pointer, left = pointer, right = index,
|
|
pointee = lower_type(state, checked), array_type = try array_shape(state, checked), span = span,
|
|
})
|
|
return try pointer_address(state, offset, checked, span)
|
|
}
|
|
base = try pointer_address(state, pointer, descriptor.element, span)
|
|
} else base = try lower_place(state, expression.base)
|
|
if (state.terminated) return ir.no_value
|
|
index :: try lower_expression(state, expression.index)
|
|
if (state.terminated or trap_type(state, id)) return ir.no_value
|
|
return try emit(state, ir.Instruction{
|
|
op = .index_address,
|
|
type = .address,
|
|
pointee = lower_type(state, checked),
|
|
array_type = try array_shape(state, checked),
|
|
left = base,
|
|
right = index,
|
|
span = span,
|
|
})
|
|
}
|
|
if (trap_binding(state, id) or trap_type(state, id)) return ir.no_value
|
|
binding :: sema.binding(state.resolution, id)
|
|
location :: state.storage[usize(binding.data.declaration)]
|
|
operation ir.Op :: if (location.kind == .global) .address_global else .address_local
|
|
return try emit(state, ir.Instruction{
|
|
op = operation,
|
|
type = .address,
|
|
pointee = lower_type(state, checked),
|
|
array_type = try array_shape(state, checked),
|
|
slot = location.index,
|
|
span = span,
|
|
})
|
|
}
|
|
|
|
@hide:file
|
|
lower_expression proc(state @mut State, id ast.NodeId) ir.ValueId ! (mem.AllocError | diagnostics.CapacityError) {
|
|
tree :: state.tree
|
|
span :: ast.node_span(tree, id)
|
|
type :: lower_type(state, typecheck.type_of(state.checked, id))
|
|
shape :: try array_shape(state, typecheck.type_of(state.checked, id))
|
|
if (typecheck.is_enum_member(state.checked, id)) {
|
|
if (trap_type(state, id)) return ir.no_value
|
|
return try constant(state, enum_value(state, typecheck.type_of(state.checked, id), typecheck.field_index(state.checked, id)), span)
|
|
}
|
|
if (typecheck.is_union_variant(state.checked, id)) return try lower_union(state, id)
|
|
match ast.expr_kind(tree, id) {
|
|
.comptime_expr: {
|
|
if (!trap_type(state, id)) unreachable
|
|
}
|
|
.typed_constant: {
|
|
if (trap_type(state, id)) return ir.no_value
|
|
return try lower_as(state, ast.typed_constant(tree, id).value, typecheck.type_of(state.checked, id))
|
|
}
|
|
.invalid: {
|
|
invalid :: ast.invalid(tree, id)
|
|
trap(state, invalid.diagnostic, invalid.span)
|
|
}
|
|
.range: {
|
|
# ranges have no physical value; only lower_for decomposes an iterable.
|
|
if (!trap_type(state, id)) unreachable
|
|
}
|
|
.array_type, .pointer_type, .function_type, .record_type, .enum_type, .union_type, .distinct_type, .slice_type, .optional_type, .fallible_type, .sum_type: {
|
|
if (!trap_type(state, id)) trap(state, try diagnostics.add(state.diagnostics, .type_not_value, span), span)
|
|
}
|
|
.alias_expr: return try lower_expression(state, ast.type_operand(tree, id))
|
|
.enum_literal: {
|
|
if (!trap_type(state, id)) unreachable
|
|
}
|
|
.match_expr: return try lower_match(state, id)
|
|
.try_expr: return try lower_try(state, id)
|
|
.catch_expr: return try lower_catch(state, id)
|
|
.literal_null: return try null_constant(state, .pointer, span)
|
|
.literal_void: return ir.no_value
|
|
.slice: return try lower_slice(state, id)
|
|
.builtin_call: return try lower_builtin(state, id)
|
|
.record_literal: {
|
|
checked :: typecheck.type_of(state.checked, id)
|
|
if (checked.kind == .record and typecheck.record_type(state.checked, checked.record_type).is_union) return try lower_union(state, id)
|
|
return try lower_record_as(state, id, checked)
|
|
}
|
|
.array_literal: {
|
|
scratch_start :: state.arguments.items.len
|
|
defer state.arguments.items = state.arguments.items.ptr[..scratch_start]
|
|
count :: ast.array_element_count(tree, id)
|
|
try arraylist.reserve(&state.arguments, scratch_start + count)
|
|
for (0..count) |_| try arraylist.append(&state.arguments, ir.no_value)
|
|
for (0..count) |i| {
|
|
expected :: typecheck.array_type(state.checked, typecheck.type_of(state.checked, id).array_type).element
|
|
element :: try lower_as(state, ast.array_element(tree, id, i), expected)
|
|
if (state.terminated) return ir.no_value
|
|
state.arguments.items[scratch_start + i] = element
|
|
}
|
|
if (trap_type(state, id)) return ir.no_value
|
|
block := &state.module.functions.items[state.function].blocks.items[usize(state.block)]
|
|
start :: block.arguments.items.len
|
|
try arraylist.reserve(&block.arguments, start + count)
|
|
for (0..count) |i| try arraylist.append(&block.arguments, state.arguments.items[scratch_start + i])
|
|
return try emit(state, ir.Instruction{
|
|
op = .array_literal,
|
|
type = .array,
|
|
array_type = shape,
|
|
arguments_start = start,
|
|
arguments_count = count,
|
|
span = span,
|
|
})
|
|
}
|
|
.index: {
|
|
if (is_place(state, id)) {
|
|
address :: try lower_place(state, id)
|
|
if (state.terminated) return ir.no_value
|
|
return try emit(state, ir.Instruction{
|
|
op = .load_address, type = type, array_type = shape, left = address, span = span,
|
|
})
|
|
}
|
|
expression :: ast.index_expr(tree, id)
|
|
base :: try lower_expression(state, expression.base)
|
|
if (state.terminated) return ir.no_value
|
|
index :: try lower_expression(state, expression.index)
|
|
if (state.terminated or trap_type(state, id)) return ir.no_value
|
|
return try emit(state, ir.Instruction{
|
|
op = .index, type = type, array_type = shape, left = base, right = index, span = span,
|
|
})
|
|
}
|
|
.literal_int, .literal_float: {
|
|
if (trap_type(state, id)) return ir.no_value
|
|
return try lower_number(state, id)
|
|
}
|
|
.literal_bool: {
|
|
if (trap_type(state, id)) return ir.no_value
|
|
return try constant(state, ir.Value{
|
|
type = .bool,
|
|
data = ir.ValueData{ boolean = mem.eql(ast.literal_text(tree, id), "true") },
|
|
}, span)
|
|
}
|
|
.literal_string: {
|
|
if (trap_type(state, id)) return ir.no_value
|
|
return try lower_string(state, id)
|
|
}
|
|
.identifier, .selection: {
|
|
if (
|
|
ast.expr_kind(tree, id) == .selection
|
|
and sema.binding(state.resolution, id).kind == .none
|
|
) {
|
|
selection :: ast.selection_expr(tree, id)
|
|
base_type :: typecheck.type_of(state.checked, selection.base)
|
|
if (base_type.kind == .slice or base_type.kind == .string or base_type.kind == .array) {
|
|
member :: ast.source_text(tree, ast.node_span(tree, selection.member))
|
|
if (mem.eql(member, "len") or mem.eql(member, "ptr")) {
|
|
parts :: try slice_parts(state, selection.base)
|
|
if (state.terminated or trap_type(state, id)) return ir.no_value
|
|
return if (mem.eql(member, "len")) parts.bound else parts.pointer
|
|
}
|
|
}
|
|
if (base_type.kind == .pointer) {
|
|
descriptor :: typecheck.pointer_type(state.checked, base_type.pointer_type)
|
|
if (!descriptor.many and descriptor.element.kind == .array) {
|
|
pointer :: try lower_expression(state, selection.base)
|
|
if (state.terminated or trap_type(state, id)) return ir.no_value
|
|
member :: ast.source_text(tree, ast.node_span(tree, selection.member))
|
|
array :: typecheck.array_type(state.checked, descriptor.element.array_type)
|
|
if (mem.eql(member, "len")) return try constant(state, ir.Value{
|
|
type = .usize, data = ir.ValueData{ unsigned = u64(array.len) },
|
|
}, span)
|
|
if (mem.eql(member, "ptr")) {
|
|
zero :: try constant(state, ir.Value{ type = .usize, data = ir.ValueData{ unsigned = 0 } }, span)
|
|
return try emit(state, ir.Instruction{
|
|
op = .pointer_offset, type = .pointer, left = pointer, right = zero,
|
|
pointee = lower_type(state, array.element), array_type = try array_shape(state, array.element), span = span,
|
|
})
|
|
}
|
|
}
|
|
}
|
|
if (is_place(state, id)) {
|
|
address :: try lower_place(state, id)
|
|
if (state.terminated) return ir.no_value
|
|
return try emit(state, ir.Instruction{
|
|
op = .load_address, type = type, array_type = shape, left = address, span = span,
|
|
})
|
|
}
|
|
base :: try lower_expression(state, ast.selection_expr(tree, id).base)
|
|
if (state.terminated or trap_type(state, id)) return ir.no_value
|
|
return try emit(state, ir.Instruction{
|
|
op = .field, type = type, array_type = shape, left = base,
|
|
slot = u32(typecheck.field_index(state.checked, id)), span = span,
|
|
})
|
|
}
|
|
if (trap_binding(state, id) or trap_type(state, id)) return ir.no_value
|
|
binding :: sema.binding(state.resolution, id)
|
|
location :: state.storage[usize(binding.data.declaration)]
|
|
match location.kind {
|
|
.function: return try constant(state, ir.Value{
|
|
type = .function,
|
|
data = ir.ValueData{ function = ir.FunctionId(location.index) },
|
|
}, span)
|
|
.global, .local: {
|
|
declaration_type :: typecheck.type_of(state.checked, binding.data.declaration)
|
|
operation :: if (location.kind == .global) ir.Op.load_global else ir.Op.load_local
|
|
value :: try emit(state, ir.Instruction{
|
|
op = operation, type = lower_type(state, declaration_type),
|
|
array_type = try array_shape(state, declaration_type), slot = location.index, span = span,
|
|
})
|
|
return try convert_value(state, value, declaration_type, typecheck.type_of(state.checked, id), span)
|
|
}
|
|
.none: unreachable
|
|
}
|
|
}
|
|
.unary: {
|
|
expression :: ast.unary_expr(tree, id)
|
|
if (expression.operator == .unwrap) {
|
|
operand :: try lower_expression(state, expression.operand)
|
|
if (state.terminated or trap_type(state, id)) return ir.no_value
|
|
source :: typecheck.type_of(state.checked, expression.operand)
|
|
present :: try optional_present(state, operand, source, span)
|
|
_ = try emit(state, ir.Instruction{ op = .optional_check, left = present, span = span })
|
|
return try optional_payload(state, operand, source, span)
|
|
}
|
|
if (expression.operator == .address_of) {
|
|
if (typecheck.type_of(state.checked, id).kind == .slice) {
|
|
parts :: try slice_parts(state, expression.operand)
|
|
if (state.terminated or trap_type(state, id)) return ir.no_value
|
|
return try record_pair(state, shape, parts.pointer, parts.bound, span)
|
|
}
|
|
if (!is_place(state, expression.operand)) {
|
|
_ = try lower_expression(state, expression.operand)
|
|
if (!state.terminated) _ = trap_type(state, id)
|
|
return ir.no_value
|
|
}
|
|
address :: try lower_place(state, expression.operand)
|
|
if (state.terminated or trap_type(state, id)) return ir.no_value
|
|
element :: typecheck.type_of(state.checked, expression.operand)
|
|
return try emit(state, ir.Instruction{
|
|
op = .pointer_from_address, type = .pointer, left = address,
|
|
pointee = lower_type(state, element), array_type = try array_shape(state, element), span = span,
|
|
})
|
|
}
|
|
if (expression.operator == .dereference) {
|
|
address :: try lower_place(state, id)
|
|
if (state.terminated) return ir.no_value
|
|
return try emit(state, ir.Instruction{
|
|
op = .load_address, type = type, array_type = shape, left = address, span = span,
|
|
})
|
|
}
|
|
if (expression.operator == .negate and ir.integer_bits(type) != 0 and !ir.unsigned_integer(type) and ast.expr_kind(tree, expression.operand) == .literal_int) {
|
|
text :: ast.literal_text(tree, expression.operand)
|
|
magnitude_limit :: ir.integer_max(type) + 1
|
|
if (integer_magnitude(text, magnitude_limit)) |magnitude| {
|
|
if (magnitude == magnitude_limit) return try constant(state, ir.Value{ type = type, data = ir.ValueData{ integer = ir.integer_min(type) } }, span)
|
|
}
|
|
}
|
|
operand :: try lower_expression(state, expression.operand)
|
|
if (state.terminated or trap_type(state, id)) return ir.no_value
|
|
op ir.Op :: match expression.operator {
|
|
.negate: .negate
|
|
.logical_not: .logical_not
|
|
.address_of, .dereference, .unwrap: unreachable
|
|
}
|
|
return try emit(state, ir.Instruction{ op = op, type = type, left = operand, span = span })
|
|
}
|
|
.binary: {
|
|
expression :: ast.binary_expr(tree, id)
|
|
if (expression.operator == .logical_and or expression.operator == .logical_or) return try lower_logical(state, id)
|
|
left_type :: typecheck.type_of(state.checked, expression.left)
|
|
right_type :: typecheck.type_of(state.checked, expression.right)
|
|
if (
|
|
(expression.operator == .equal or expression.operator == .not_equal)
|
|
and (left_type.kind == .null or right_type.kind == .null)
|
|
) {
|
|
optional_id :: if (left_type.kind == .null) expression.right else expression.left
|
|
value :: try lower_expression(state, optional_id)
|
|
if (state.terminated or trap_type(state, id)) return ir.no_value
|
|
present :: try optional_present(state, value, typecheck.type_of(state.checked, optional_id), span)
|
|
if (expression.operator == .not_equal) return present
|
|
return try emit(state, ir.Instruction{ op = .logical_not, type = .bool, left = present, span = span })
|
|
}
|
|
left :: try lower_expression(state, expression.left)
|
|
if (state.terminated) return ir.no_value
|
|
right :: try lower_expression(state, expression.right)
|
|
if (state.terminated or trap_type(state, id)) return ir.no_value
|
|
if (expression.operator == .add and type == .pointer) {
|
|
pointer :: typecheck.pointer_type(state.checked, typecheck.type_of(state.checked, id).pointer_type)
|
|
return try emit(state, ir.Instruction{
|
|
op = .pointer_offset, type = .pointer, left = left, right = right,
|
|
pointee = lower_type(state, pointer.element),
|
|
array_type = try array_shape(state, pointer.element), span = span,
|
|
})
|
|
}
|
|
op ir.Op :: match expression.operator {
|
|
.add: .add
|
|
.subtract: .subtract
|
|
.multiply: .multiply
|
|
.divide: .divide
|
|
.equal: .equal
|
|
.not_equal: .not_equal
|
|
.less: .less
|
|
.less_equal: .less_equal
|
|
.greater: .greater
|
|
.greater_equal: .greater_equal
|
|
.logical_and, .logical_or: unreachable
|
|
}
|
|
return try emit(state, ir.Instruction{ op = op, type = type, left = left, right = right, span = span })
|
|
}
|
|
.call: {
|
|
target :: sema.binding(state.resolution, ast.call_expr(tree, id).callee)
|
|
if (target.kind == .builtin or typecheck.is_type_constructor(state.checked, id)) {
|
|
operand := ir.no_value
|
|
for (0..ast.call_arg_count(tree, id)) |i| {
|
|
value :: try lower_expression(state, ast.call_arg(tree, id, i))
|
|
if (state.terminated) return ir.no_value
|
|
if (i == 0) operand = value
|
|
}
|
|
if (trap_type(state, id)) return ir.no_value
|
|
if (typecheck.is_type_constructor(state.checked, id)) {
|
|
source :: lower_type(state, typecheck.type_of(state.checked, ast.call_arg(tree, id, 0)))
|
|
if (source == type) return operand
|
|
}
|
|
return try emit(state, ir.Instruction{ op = .convert, type = type, left = operand, span = span })
|
|
}
|
|
callee :: try lower_expression(state, ast.call_expr(tree, id).callee)
|
|
if (state.terminated) return ir.no_value
|
|
# recursion borrows later scratch slots; no items pointer survives a child.
|
|
scratch_start :: state.arguments.items.len
|
|
defer state.arguments.items = state.arguments.items.ptr[..scratch_start]
|
|
count :: ast.call_arg_count(tree, id)
|
|
try arraylist.reserve(&state.arguments, scratch_start + count)
|
|
for (0..count) |_| try arraylist.append(&state.arguments, ir.no_value)
|
|
for (0..count) |i| {
|
|
signature :: typecheck.type_of(state.checked, ast.call_expr(tree, id).callee).function
|
|
expected := typecheck.Type{}
|
|
if (signature != ast.NodeId(maxval!(u32)) and i < ast.function_param_count(tree, signature)) expected = typecheck.type_of(state.checked, ast.param(tree, ast.function_param(tree, signature, i)).type)
|
|
argument :: try lower_as(state, ast.call_arg(tree, id, i), expected)
|
|
if (state.terminated) return ir.no_value
|
|
state.arguments.items[scratch_start + i] = argument
|
|
}
|
|
if (trap_type(state, id)) return ir.no_value
|
|
# branchful arguments end in a different block from the callee.
|
|
block := &state.module.functions.items[state.function].blocks.items[usize(state.block)]
|
|
start :: block.arguments.items.len
|
|
try arraylist.reserve(&block.arguments, start + count)
|
|
for (0..count) |i| try arraylist.append(&block.arguments, state.arguments.items[scratch_start + i])
|
|
return try emit(state, ir.Instruction{
|
|
op = .call,
|
|
type = type,
|
|
array_type = shape,
|
|
left = callee,
|
|
arguments_start = start,
|
|
arguments_count = count,
|
|
span = span,
|
|
})
|
|
}
|
|
}
|
|
return ir.no_value
|
|
}
|
|
|
|
@hide:file
|
|
integer_magnitude proc(text []u8, limit u64) ?u64 {
|
|
value := u64(0)
|
|
for (text) |byte| {
|
|
if (byte < '0' or byte > '9') return null
|
|
digit :: u64(byte - '0')
|
|
if (digit > limit or value > divtrunc!(limit - digit, u64(10))) return null
|
|
value = value * 10 + digit
|
|
}
|
|
return value
|
|
}
|
|
|
|
@hide:file
|
|
exact_float_integer proc(text []u8, value f64) bool {
|
|
# every finite f64 integer has at most 309 decimal digits, plus a terminator.
|
|
decimal [310]mut u8 := undefined
|
|
count :: c.snprintf(ptrcast!((&decimal).ptr), c_ulong(decimal.len), "%.0f", value)
|
|
if (count < 0 or usize(count) >= decimal.len) return false
|
|
start := usize(0)
|
|
while (start + 1 < text.len and text[start] == '0') start += 1
|
|
return mem.eql(text[start..], decimal[..usize(count)])
|
|
}
|
|
|
|
@hide:file
|
|
lower_number proc(state @mut State, id ast.NodeId) ir.ValueId ! (mem.AllocError | diagnostics.CapacityError) {
|
|
span :: ast.node_span(state.tree, id)
|
|
if (ast.float_value(state.tree, id)) |value| {
|
|
return try constant(state, ir.Value{
|
|
type = .float,
|
|
data = ir.ValueData{ real = value },
|
|
}, span)
|
|
}
|
|
text :: ast.literal_text(state.tree, id)
|
|
type :: lower_type(state, typecheck.type_of(state.checked, id))
|
|
if (ir.integer_bits(type) != 0 and !ir.unsigned_integer(type)) {
|
|
if (integer_magnitude(text, ir.integer_max(type))) |magnitude| return try constant(state, ir.Value{ type = type, data = ir.ValueData{ integer = i64(magnitude) } }, span)
|
|
} else if (ir.unsigned_integer(type)) {
|
|
if (integer_magnitude(text, ir.integer_max(type))) |magnitude| return try constant(state, ir.Value{ type = type, data = ir.ValueData{ unsigned = magnitude } }, span)
|
|
} else {
|
|
value :: strconv.parse_float(state.module.allocator, text) catch |err| {
|
|
match err {
|
|
.out_of_memory: return err
|
|
.invalid_number, .out_of_range: {
|
|
trap(state, try diagnostics.add(state.diagnostics, .literal_out_of_range, span), span)
|
|
return ir.no_value
|
|
}
|
|
}
|
|
}
|
|
if (ast.expr_kind(state.tree, id) == .literal_int and !exact_float_integer(text, value)) {
|
|
trap(state, try diagnostics.add(state.diagnostics, .inexact_integer_literal, span), span)
|
|
return ir.no_value
|
|
}
|
|
return try constant(state, ir.Value{ type = .float, data = ir.ValueData{ real = value } }, span)
|
|
}
|
|
trap(state, try diagnostics.add(state.diagnostics, .literal_out_of_range, span), span)
|
|
return ir.no_value
|
|
}
|
|
|
|
@hide:file
|
|
lower_string proc(state @mut State, id ast.NodeId) ir.ValueId ! (mem.AllocError | diagnostics.CapacityError) {
|
|
span :: ast.node_span(state.tree, id)
|
|
text :: ast.literal_text(state.tree, id)
|
|
owned :: try mem.alloc(u8, state.module.allocator, text.len - 2)
|
|
transferred := false
|
|
defer if (!transferred) mem.free(state.module.allocator, owned)
|
|
length := usize(0)
|
|
cursor := usize(1)
|
|
end :: text.len - 1
|
|
while (cursor < end) {
|
|
byte :: ast.string_next(text, &cursor) catch |_| {
|
|
trap(state, try diagnostics.add(state.diagnostics, .invalid_escape, span), span)
|
|
return ir.no_value
|
|
}
|
|
owned[length] = byte
|
|
length += 1
|
|
}
|
|
if (state.module.strings.items.len > usize(maxval!(ir.StringId)))
|
|
return .out_of_memory
|
|
|
|
string_id :: ir.StringId(state.module.strings.items.len)
|
|
try arraylist.append(&state.module.strings, ir.StringStorage{
|
|
allocation = owned,
|
|
len = length,
|
|
})
|
|
transferred = true
|
|
return try constant(state, ir.Value{
|
|
type = .string,
|
|
data = ir.ValueData{ string = string_id },
|
|
}, span)
|
|
} |