Commit 0d2c25ca9d
Changed files (1)
src
arch
aarch64
src/arch/aarch64/CodeGen.zig
@@ -23,7 +23,7 @@ const leb128 = std.leb;
const log = std.log.scoped(.codegen);
const build_options = @import("build_options");
-const GenerateSymbolError = codegen.GenerateSymbolError;
+const CodeGenError = codegen.CodeGenError;
const Result = codegen.Result;
const DebugInfoOutput = codegen.DebugInfoOutput;
@@ -41,7 +41,7 @@ const c_abi_int_param_regs = abi.c_abi_int_param_regs;
const c_abi_int_return_regs = abi.c_abi_int_return_regs;
const gp = abi.RegisterClass.gp;
-const InnerError = codegen.CodeGenError || error{OutOfRegisters};
+const InnerError = CodeGenError || error{OutOfRegisters};
gpa: Allocator,
air: Air,
@@ -333,7 +333,7 @@ pub fn generate(
liveness: Liveness,
code: *std.ArrayList(u8),
debug_output: DebugInfoOutput,
-) GenerateSymbolError!Result {
+) CodeGenError!Result {
if (build_options.skip_non_native and builtin.cpu.arch != bin_file.options.target.cpu.arch) {
@panic("Attempted to compile for architecture that was disabled by build configuration");
}
@@ -6133,201 +6133,26 @@ fn getResolvedInstValue(self: *Self, inst: Air.Inst.Index) MCValue {
}
}
-fn lowerDeclRef(self: *Self, tv: TypedValue, decl_index: Module.Decl.Index) InnerError!MCValue {
- const ptr_bits = self.target.cpu.arch.ptrBitWidth();
- const ptr_bytes: u64 = @divExact(ptr_bits, 8);
-
- // TODO this feels clunky. Perhaps we should check for it in `genTypedValue`?
- if (tv.ty.zigTypeTag() == .Pointer) blk: {
- if (tv.ty.castPtrToFn()) |_| break :blk;
- if (!tv.ty.elemType2().hasRuntimeBits()) {
- return MCValue.none;
- }
- }
-
- const mod = self.bin_file.options.module.?;
- const decl = mod.declPtr(decl_index);
- mod.markDeclAlive(decl);
-
- if (self.bin_file.cast(link.File.Elf)) |elf_file| {
- const atom_index = try elf_file.getOrCreateAtomForDecl(decl_index);
- const atom = elf_file.getAtom(atom_index);
- return MCValue{ .memory = atom.getOffsetTableAddress(elf_file) };
- } else if (self.bin_file.cast(link.File.MachO)) |macho_file| {
- const atom = try macho_file.getOrCreateAtomForDecl(decl_index);
- const sym_index = macho_file.getAtom(atom).getSymbolIndex().?;
- return MCValue{ .linker_load = .{
- .type = .got,
- .sym_index = sym_index,
- } };
- } else if (self.bin_file.cast(link.File.Coff)) |coff_file| {
- const atom_index = try coff_file.getOrCreateAtomForDecl(decl_index);
- const sym_index = coff_file.getAtom(atom_index).getSymbolIndex().?;
- return MCValue{ .linker_load = .{
- .type = .got,
- .sym_index = sym_index,
- } };
- } else if (self.bin_file.cast(link.File.Plan9)) |p9| {
- const decl_block_index = try p9.seeDecl(decl_index);
- const decl_block = p9.getDeclBlock(decl_block_index);
- const got_addr = p9.bases.data + decl_block.got_index.? * ptr_bytes;
- return MCValue{ .memory = got_addr };
- } else {
- return self.fail("TODO codegen non-ELF const Decl pointer", .{});
- }
-}
-
-fn lowerUnnamedConst(self: *Self, tv: TypedValue) InnerError!MCValue {
- log.debug("lowerUnnamedConst: ty = {}, val = {}", .{ tv.ty.fmtDebug(), tv.val.fmtDebug() });
- const local_sym_index = self.bin_file.lowerUnnamedConst(tv, self.mod_fn.owner_decl) catch |err| {
- return self.fail("lowering unnamed constant failed: {s}", .{@errorName(err)});
- };
- if (self.bin_file.cast(link.File.Elf)) |elf_file| {
- return MCValue{ .memory = elf_file.getSymbol(local_sym_index).st_value };
- } else if (self.bin_file.cast(link.File.MachO)) |_| {
- return MCValue{ .linker_load = .{
- .type = .direct,
- .sym_index = local_sym_index,
- } };
- } else if (self.bin_file.cast(link.File.Coff)) |_| {
- return MCValue{ .linker_load = .{
- .type = .direct,
- .sym_index = local_sym_index,
- } };
- } else if (self.bin_file.cast(link.File.Plan9)) |_| {
- return self.fail("TODO lower unnamed const in Plan9", .{});
- } else {
- return self.fail("TODO lower unnamed const", .{});
- }
-}
-
fn genTypedValue(self: *Self, arg_tv: TypedValue) InnerError!MCValue {
- var typed_value = arg_tv;
- if (typed_value.val.castTag(.runtime_value)) |rt| {
- typed_value.val = rt.data;
- }
- log.debug("genTypedValue: ty = {}, val = {}", .{ typed_value.ty.fmtDebug(), typed_value.val.fmtDebug() });
- if (typed_value.val.isUndef())
- return MCValue{ .undef = {} };
-
- if (typed_value.val.castTag(.decl_ref)) |payload| {
- return self.lowerDeclRef(typed_value, payload.data);
- }
- if (typed_value.val.castTag(.decl_ref_mut)) |payload| {
- return self.lowerDeclRef(typed_value, payload.data.decl_index);
- }
- const target = self.target.*;
-
- switch (typed_value.ty.zigTypeTag()) {
- .Pointer => switch (typed_value.ty.ptrSize()) {
- .Slice => {},
- else => {
- switch (typed_value.val.tag()) {
- .int_u64 => {
- return MCValue{ .immediate = typed_value.val.toUnsignedInt(target) };
- },
- else => {},
- }
- },
+ const mcv: MCValue = switch (try codegen.genTypedValue(
+ self.bin_file,
+ self.src_loc,
+ arg_tv,
+ self.mod_fn.owner_decl,
+ )) {
+ .mcv => |mcv| switch (mcv) {
+ .none => .none,
+ .undef => .undef,
+ .linker_load => |ll| .{ .linker_load = ll },
+ .immediate => |imm| .{ .immediate = imm },
+ .memory => |addr| .{ .memory = addr },
},
- .Int => {
- const info = typed_value.ty.intInfo(self.target.*);
- if (info.bits <= 64) {
- const unsigned = switch (info.signedness) {
- .signed => blk: {
- const signed = typed_value.val.toSignedInt(target);
- break :blk @bitCast(u64, signed);
- },
- .unsigned => typed_value.val.toUnsignedInt(target),
- };
-
- return MCValue{ .immediate = unsigned };
- }
+ .fail => |msg| {
+ self.err_msg = msg;
+ return error.CodegenFail;
},
- .Bool => {
- return MCValue{ .immediate = @boolToInt(typed_value.val.toBool()) };
- },
- .Optional => {
- if (typed_value.ty.isPtrLikeOptional()) {
- if (typed_value.val.isNull())
- return MCValue{ .immediate = 0 };
-
- var buf: Type.Payload.ElemType = undefined;
- return self.genTypedValue(.{
- .ty = typed_value.ty.optionalChild(&buf),
- .val = typed_value.val,
- });
- } else if (typed_value.ty.abiSize(self.target.*) == 1) {
- return MCValue{ .immediate = @boolToInt(typed_value.val.isNull()) };
- }
- },
- .Enum => {
- if (typed_value.val.castTag(.enum_field_index)) |field_index| {
- switch (typed_value.ty.tag()) {
- .enum_simple => {
- return MCValue{ .immediate = field_index.data };
- },
- .enum_full, .enum_nonexhaustive => {
- const enum_full = typed_value.ty.cast(Type.Payload.EnumFull).?.data;
- if (enum_full.values.count() != 0) {
- const tag_val = enum_full.values.keys()[field_index.data];
- return self.genTypedValue(.{ .ty = enum_full.tag_ty, .val = tag_val });
- } else {
- return MCValue{ .immediate = field_index.data };
- }
- },
- else => unreachable,
- }
- } else {
- var int_tag_buffer: Type.Payload.Bits = undefined;
- const int_tag_ty = typed_value.ty.intTagType(&int_tag_buffer);
- return self.genTypedValue(.{ .ty = int_tag_ty, .val = typed_value.val });
- }
- },
- .ErrorSet => {
- switch (typed_value.val.tag()) {
- .@"error" => {
- const err_name = typed_value.val.castTag(.@"error").?.data.name;
- const module = self.bin_file.options.module.?;
- const global_error_set = module.global_error_set;
- const error_index = global_error_set.get(err_name).?;
- return MCValue{ .immediate = error_index };
- },
- else => {
- // In this case we are rendering an error union which has a 0 bits payload.
- return MCValue{ .immediate = 0 };
- },
- }
- },
- .ErrorUnion => {
- const error_type = typed_value.ty.errorUnionSet();
- const payload_type = typed_value.ty.errorUnionPayload();
-
- const is_pl = typed_value.val.errorUnionIsPayload();
-
- if (!payload_type.hasRuntimeBitsIgnoreComptime()) {
- // We use the error type directly as the type.
- const err_val = if (!is_pl) typed_value.val else Value.initTag(.zero);
- return self.genTypedValue(.{ .ty = error_type, .val = err_val });
- }
-
- return self.lowerUnnamedConst(typed_value);
- },
-
- .ComptimeInt => unreachable, // semantic analysis prevents this
- .ComptimeFloat => unreachable, // semantic analysis prevents this
- .Type => unreachable,
- .EnumLiteral => unreachable,
- .Void => unreachable,
- .NoReturn => unreachable,
- .Undefined => unreachable,
- .Null => unreachable,
- .Opaque => unreachable,
-
- else => {},
- }
-
- return self.lowerUnnamedConst(typed_value);
+ };
+ return mcv;
}
const CallMCValues = struct {