Commit d83c76eb5a

Veikka Tuominen <git@vexu.eu>
2025-09-14 15:41:44
update aro & translate-c
1 parent e05073b
lib/compiler/aro/aro/Driver/GCCVersion.zig
@@ -57,7 +57,7 @@ pub fn parse(text: []const u8) GCCVersion {
     var good = bad;
 
     var it = mem.splitScalar(u8, text, '.');
-    const first = it.next().?;
+    const first = it.first();
     const second = it.next() orelse "";
     const rest = it.next() orelse "";
 
lib/compiler/aro/aro/Preprocessor/Diagnostic.zig
@@ -449,3 +449,10 @@ pub const date_time: Diagnostic = .{
     .opt = .@"date-time",
     .show_in_system_headers = true,
 };
+
+pub const no_argument_variadic_macro: Diagnostic = .{
+    .fmt = "passing no argument for the '...' parameter of a variadic macro is incompatible with C standards before C23",
+    .opt = .@"variadic-macro-arguments-omitted",
+    .kind = .off,
+    .extension = true,
+};
lib/compiler/aro/aro/Attribute.zig
@@ -792,12 +792,7 @@ pub fn normalize(name: []const u8) []const u8 {
 }
 
 fn ignoredAttrErr(p: *Parser, tok: TokenIndex, attr: Attribute.Tag, context: []const u8) !void {
-    const strings_top = p.strings.items.len;
-    defer p.strings.items.len = strings_top;
-
-    try p.strings.print("attribute '{s}' ignored on {s}", .{ @tagName(attr), context });
-    const str = try p.comp.diagnostics.arena.allocator().dupe(u8, p.strings.items[strings_top..]);
-    try p.errStr(.ignored_attribute, tok, str);
+    try p.err(tok, .ignored_attribute, .{ @tagName(attr), context });
 }
 
 pub fn applyParameterAttributes(p: *Parser, qt: QualType, attr_buf_start: usize, diagnostic: ?Parser.Diagnostic) !QualType {
lib/compiler/aro/aro/Compilation.zig
@@ -132,6 +132,8 @@ sources: std.StringArrayHashMapUnmanaged(Source) = .empty,
 /// Allocated into `gpa`, but keys are externally managed.
 include_dirs: std.ArrayList([]const u8) = .empty,
 /// Allocated into `gpa`, but keys are externally managed.
+iquote_include_dirs: std.ArrayList([]const u8) = .empty,
+/// Allocated into `gpa`, but keys are externally managed.
 system_include_dirs: std.ArrayList([]const u8) = .empty,
 /// Allocated into `gpa`, but keys are externally managed.
 after_include_dirs: std.ArrayList([]const u8) = .empty,
@@ -192,6 +194,7 @@ pub fn deinit(comp: *Compilation) void {
     }
     comp.sources.deinit(gpa);
     comp.include_dirs.deinit(gpa);
+    comp.iquote_include_dirs.deinit(gpa);
     comp.system_include_dirs.deinit(gpa);
     comp.after_include_dirs.deinit(gpa);
     comp.framework_dirs.deinit(gpa);
@@ -240,12 +243,26 @@ fn generateSystemDefines(comp: *Compilation, w: *std.Io.Writer) !void {
     const ptr_width = comp.target.ptrBitWidth();
     const is_gnu = comp.langopts.standard.isGNU();
 
-    if (comp.langopts.gnuc_version > 0) {
-        try w.print("#define __GNUC__ {d}\n", .{comp.langopts.gnuc_version / 10_000});
-        try w.print("#define __GNUC_MINOR__ {d}\n", .{comp.langopts.gnuc_version / 100 % 100});
-        try w.print("#define __GNUC_PATCHLEVEL__ {d}\n", .{comp.langopts.gnuc_version % 100});
+    const gnuc_version = comp.langopts.gnuc_version orelse comp.langopts.emulate.defaultGccVersion();
+    if (gnuc_version > 0) {
+        try w.print("#define __GNUC__ {d}\n", .{gnuc_version / 10_000});
+        try w.print("#define __GNUC_MINOR__ {d}\n", .{gnuc_version / 100 % 100});
+        try w.print("#define __GNUC_PATCHLEVEL__ {d}\n", .{gnuc_version % 100});
     }
 
+    try w.writeAll(
+        \\#define __ARO_EMULATE_CLANG__ 1
+        \\#define __ARO_EMULATE_GCC__ 2
+        \\#define __ARO_EMULATE_MSVC__ 3
+        \\
+    );
+    const emulated = switch (comp.langopts.emulate) {
+        .clang => "__ARO_EMULATE_CLANG__",
+        .gcc => "__ARO_EMULATE_GCC__",
+        .msvc => "__ARO_EMULATE_MSVC__",
+    };
+    try w.print("#define __ARO_EMULATE__ {s}\n", .{emulated});
+
     if (comp.code_gen_options.optimization_level.hasAnyOptimizations()) {
         try define(w, "__OPTIMIZE__");
     }
@@ -330,6 +347,8 @@ fn generateSystemDefines(comp: *Compilation, w: *std.Io.Writer) !void {
         => try define(w, "__APPLE__"),
         .wasi => try define(w, "__wasi__"),
         .emscripten => try define(w, "__EMSCRIPTEN__"),
+        .@"3ds" => try define(w, "__3DS__"),
+        .vita => try define(w, "__vita__"),
         else => {},
     }
 
@@ -431,10 +450,13 @@ fn generateSystemDefines(comp: *Compilation, w: *std.Io.Writer) !void {
                 .{ .f16c, "__F16C__" },
                 .{ .gfni, "__GFNI__" },
                 .{ .evex512, "__EVEX512__" },
-                .{ .avx10_1_256, "__AVX10_1__" },
-                .{ .avx10_1_512, "__AVX10_1_512__" },
-                .{ .avx10_2_256, "__AVX10_2__" },
-                .{ .avx10_2_512, "__AVX10_2_512__" },
+
+                .{ .avx10_1, "__AVX10_1__" },
+                .{ .avx10_1, "__AVX10_1_512__" },
+
+                .{ .avx10_2, "__AVX10_2__" },
+                .{ .avx10_2, "__AVX10_2_512__" },
+
                 .{ .avx512cd, "__AVX512CD__" },
                 .{ .avx512vpopcntdq, "__AVX512VPOPCNTDQ__" },
                 .{ .avx512vnni, "__AVX512VNNI__" },
@@ -935,7 +957,7 @@ fn generateSystemDefines(comp: *Compilation, w: *std.Io.Writer) !void {
 pub fn generateBuiltinMacros(comp: *Compilation, system_defines_mode: SystemDefinesMode) AddSourceError!Source {
     try comp.type_store.initNamedTypes(comp);
 
-    var allocating: std.io.Writer.Allocating = try .initCapacity(comp.gpa, 2 << 13);
+    var allocating: std.Io.Writer.Allocating = try .initCapacity(comp.gpa, 2 << 13);
     defer allocating.deinit();
 
     comp.writeBuiltinMacros(system_defines_mode, &allocating.writer) catch |err| switch (err) {
@@ -1297,6 +1319,11 @@ fn generateIntWidth(comp: *Compilation, w: *std.Io.Writer, name: []const u8, qt:
     try w.print("#define __{s}_WIDTH__ {d}\n", .{ name, qt.sizeof(comp) * 8 });
 }
 
+fn generateIntMaxAndWidth(comp: *Compilation, w: *std.Io.Writer, name: []const u8, qt: QualType) !void {
+    try comp.generateIntMax(w, name, qt);
+    try comp.generateIntWidth(w, name, qt);
+}
+
 fn generateSizeofType(comp: *Compilation, w: *std.Io.Writer, name: []const u8, qt: QualType) !void {
     try w.print("#define {s} {d}\n", .{ name, qt.sizeof(comp) });
 }
@@ -1597,7 +1624,7 @@ pub fn hasInclude(
     which: WhichInclude,
     opt_dep_file: ?*DepFile,
 ) Compilation.Error!bool {
-    if (try FindInclude.run(comp, filename, switch (which) {
+    if (try FindInclude.run(comp, filename, include_type, switch (which) {
         .next => .{ .only_search_after_dir = comp.getSource(includer_token_source).path },
         .first => switch (include_type) {
             .quotes => .{ .allow_same_dir = comp.getSource(includer_token_source).path },
@@ -1629,6 +1656,7 @@ const FindInclude = struct {
     fn run(
         comp: *Compilation,
         include_path: []const u8,
+        include_type: IncludeType,
         search_strat: union(enum) {
             allow_same_dir: []const u8,
             only_search,
@@ -1663,7 +1691,12 @@ const FindInclude = struct {
                 find.wait_for = std.fs.path.dirname(other_file);
             },
         }
-
+        switch (include_type) {
+            .quotes => for (comp.iquote_include_dirs.items) |dir| {
+                if (try find.checkIncludeDir(dir, .user)) |res| return res;
+            },
+            .angle_brackets => {},
+        }
         for (comp.include_dirs.items) |dir| {
             if (try find.checkIncludeDir(dir, .user)) |res| return res;
         }
@@ -1876,7 +1909,7 @@ pub fn findInclude(
     /// include vs include_next
     which: WhichInclude,
 ) Compilation.Error!?Source {
-    const found = try FindInclude.run(comp, filename, switch (which) {
+    const found = try FindInclude.run(comp, filename, include_type, switch (which) {
         .next => .{ .only_search_after_dir = comp.getSource(includer_token.source).path },
         .first => switch (include_type) {
             .quotes => .{ .allow_same_dir = comp.getSource(includer_token.source).path },
lib/compiler/aro/aro/Diagnostics.zig
@@ -194,6 +194,7 @@ pub const Option = enum {
     @"microsoft-anon-tag",
     @"out-of-scope-function",
     @"date-time",
+    @"variadic-macro-arguments-omitted",
     @"attribute-todo",
 
     /// GNU extensions
@@ -496,27 +497,35 @@ pub fn formatArgs(w: *std.Io.Writer, fmt: []const u8, args: anytype) std.Io.Writ
             else => switch (@typeInfo(@TypeOf(arg))) {
                 .int, .comptime_int => try Diagnostics.formatInt(w, fmt[i..], arg),
                 .pointer => try Diagnostics.formatString(w, fmt[i..], arg),
-                else => unreachable,
+                else => comptime unreachable,
             },
         };
     }
     try w.writeAll(fmt[i..]);
 }
 
-pub fn formatString(w: *std.Io.Writer, fmt: []const u8, str: []const u8) std.Io.Writer.Error!usize {
-    const template = "{s}";
-    const i = std.mem.indexOf(u8, fmt, template).?;
+pub fn templateIndex(w: *std.Io.Writer, fmt: []const u8, template: []const u8) std.Io.Writer.Error!usize {
+    const i = std.mem.indexOf(u8, fmt, template) orelse {
+        if (@import("builtin").mode == .Debug) {
+            std.debug.panic("template `{s}` not found in format string `{s}`", .{ template, fmt });
+        }
+        try w.print("template `{s}` not found in format string `{s}` (this is a bug in arocc)", .{ template, fmt });
+        return 0;
+    };
     try w.writeAll(fmt[0..i]);
-    try w.writeAll(str);
     return i + template.len;
 }
 
+pub fn formatString(w: *std.Io.Writer, fmt: []const u8, str: []const u8) std.Io.Writer.Error!usize {
+    const i = templateIndex(w, fmt, "{s}");
+    try w.writeAll(str);
+    return i;
+}
+
 pub fn formatInt(w: *std.Io.Writer, fmt: []const u8, int: anytype) std.Io.Writer.Error!usize {
-    const template = "{d}";
-    const i = std.mem.indexOf(u8, fmt, template).?;
-    try w.writeAll(fmt[0..i]);
+    const i = templateIndex(w, fmt, "{d}");
     try w.printInt(int, 10, .lower, .{});
-    return i + template.len;
+    return i;
 }
 
 fn addMessage(d: *Diagnostics, msg: Message) Compilation.Error!void {
lib/compiler/aro/aro/Driver.zig
@@ -203,6 +203,7 @@ pub const usage =
     \\  -fuse-line-directives   Use `#line <num>` linemarkers in preprocessed output
     \\  -fno-use-line-directives
     \\                          Use `# <num>` linemarkers in preprocessed output
+    \\  -iquote <dir>           Add directory to QUOTE include search path
     \\  -I <dir>                Add directory to include search path
     \\  -idirafter <dir>        Add directory to AFTER include search path
     \\  -isystem <dir>          Add directory to SYSTEM include search path
@@ -275,7 +276,7 @@ pub fn parseArgs(
     var i: usize = 1;
     var comment_arg: []const u8 = "";
     var hosted: ?bool = null;
-    var gnuc_version: []const u8 = "4.2.1"; // default value set by clang
+    var gnuc_version: ?[]const u8 = null;
     var pic_arg: []const u8 = "";
     var declspec_attrs: ?bool = null;
     var ms_extensions: ?bool = null;
@@ -529,6 +530,17 @@ pub fn parseArgs(
                     path = args[i];
                 }
                 try d.comp.system_include_dirs.append(d.comp.gpa, path);
+            } else if (mem.startsWith(u8, arg, "-iquote")) {
+                var path = arg["-iquote".len..];
+                if (path.len == 0) {
+                    i += 1;
+                    if (i >= args.len) {
+                        try d.err("expected argument after -iquote", .{});
+                        continue;
+                    }
+                    path = args[i];
+                }
+                try d.comp.iquote_include_dirs.append(d.comp.gpa, path);
             } else if (mem.startsWith(u8, arg, "-F")) {
                 var path = arg["-F".len..];
                 if (path.len == 0) {
@@ -784,11 +796,13 @@ pub fn parseArgs(
             d.comp.target.os.tag = .freestanding;
         }
     }
-    const version = GCCVersion.parse(gnuc_version);
-    if (version.major == -1) {
-        return d.fatal("invalid value '{0s}' in '-fgnuc-version={0s}'", .{gnuc_version});
+    if (gnuc_version) |unwrapped| {
+        const version = GCCVersion.parse(unwrapped);
+        if (version.major == -1) {
+            return d.fatal("invalid value '{s}' in '-fgnuc-version={s}'", .{ unwrapped, unwrapped });
+        }
+        d.comp.langopts.gnuc_version = version.toUnsigned();
     }
-    d.comp.langopts.gnuc_version = version.toUnsigned();
     const pic_level, const is_pie = try d.getPICMode(pic_arg);
     d.comp.code_gen_options.pic_level = pic_level;
     d.comp.code_gen_options.is_pie = is_pie;
@@ -1039,7 +1053,7 @@ fn getRandomFilename(d: *Driver, buf: *[std.fs.max_name_bytes]u8, extension: []c
 
     const fmt_template = "/tmp/{s}{s}";
     const fmt_args = .{
-        random_name,
+        @as([]const u8, &random_name),
         extension,
     };
     return std.fmt.bufPrint(buf, fmt_template, fmt_args) catch return d.fatal("Filename too long for filesystem: " ++ fmt_template, fmt_args);
lib/compiler/aro/aro/LangOpts.zig
@@ -7,6 +7,14 @@ pub const Compiler = enum {
     clang,
     gcc,
     msvc,
+
+    pub fn defaultGccVersion(self: Compiler) u32 {
+        return switch (self) {
+            .clang => 4 * 10_000 + 2 * 100 + 1,
+            .gcc => 7 * 10_000 + 1 * 100 + 0,
+            .msvc => 0,
+        };
+    }
 };
 
 /// The floating-point evaluation method for intermediate results within a single expression
@@ -139,7 +147,7 @@ preserve_comments_in_macros: bool = false,
 /// Used ONLY for generating __GNUC__ and related macros. Does not control the presence/absence of any features
 /// Encoded as major * 10,000 + minor * 100 + patch
 /// e.g. 4.2.1 == 40201
-gnuc_version: u32 = 0,
+gnuc_version: ?u32 = null,
 
 pub fn setStandard(self: *LangOpts, name: []const u8) error{InvalidStandard}!void {
     self.standard = Standard.NameMap.get(name) orelse return error.InvalidStandard;
lib/compiler/aro/aro/Parser.zig
@@ -469,7 +469,7 @@ fn formatArgs(p: *Parser, w: *std.Io.Writer, fmt: []const u8, args: anytype) !vo
             else => switch (@typeInfo(@TypeOf(arg))) {
                 .int, .comptime_int => try Diagnostics.formatInt(w, fmt[i..], arg),
                 .pointer => try Diagnostics.formatString(w, fmt[i..], arg),
-                else => unreachable,
+                else => comptime unreachable,
             },
         };
     }
@@ -477,22 +477,18 @@ fn formatArgs(p: *Parser, w: *std.Io.Writer, fmt: []const u8, args: anytype) !vo
 }
 
 fn formatTokenId(w: *std.Io.Writer, fmt: []const u8, tok_id: Tree.Token.Id) !usize {
-    const template = "{tok_id}";
-    const i = std.mem.indexOf(u8, fmt, template).?;
-    try w.writeAll(fmt[0..i]);
+    const i = Diagnostics.templateIndex(w, fmt, "{tok_id}");
     try w.writeAll(tok_id.symbol());
-    return i + template.len;
+    return i;
 }
 
 fn formatQualType(p: *Parser, w: *std.Io.Writer, fmt: []const u8, qt: QualType) !usize {
-    const template = "{qt}";
-    const i = std.mem.indexOf(u8, fmt, template).?;
-    try w.writeAll(fmt[0..i]);
+    const i = Diagnostics.templateIndex(w, fmt, "{qt}");
     try w.writeByte('\'');
     try qt.print(p.comp, w);
     try w.writeByte('\'');
 
-    if (qt.isC23Auto()) return i + template.len;
+    if (qt.isC23Auto()) return i;
     if (qt.get(p.comp, .vector)) |vector_ty| {
         try w.print(" (vector of {d} '", .{vector_ty.len});
         try vector_ty.elem.printDesugared(p.comp, w);
@@ -502,14 +498,11 @@ fn formatQualType(p: *Parser, w: *std.Io.Writer, fmt: []const u8, qt: QualType)
         try qt.printDesugared(p.comp, w);
         try w.writeAll("')");
     }
-    return i + template.len;
+    return i;
 }
 
 fn formatResult(p: *Parser, w: *std.Io.Writer, fmt: []const u8, res: Result) !usize {
-    const template = "{value}";
-    const i = std.mem.indexOf(u8, fmt, template).?;
-    try w.writeAll(fmt[0..i]);
-
+    const i = Diagnostics.templateIndex(w, fmt, "{value}");
     switch (res.val.opt_ref) {
         .none => try w.writeAll("(none)"),
         .null => try w.writeAll("nullptr_t"),
@@ -521,8 +514,7 @@ fn formatResult(p: *Parser, w: *std.Io.Writer, fmt: []const u8, res: Result) !us
             },
         },
     }
-
-    return i + template.len;
+    return i;
 }
 
 const Normalized = struct {
@@ -532,10 +524,8 @@ const Normalized = struct {
         return .{ .str = str };
     }
 
-    pub fn format(ctx: Normalized, w: *std.Io.Writer, fmt_str: []const u8) !usize {
-        const template = "{normalized}";
-        const i = std.mem.indexOf(u8, fmt_str, template).?;
-        try w.writeAll(fmt_str[0..i]);
+    pub fn format(ctx: Normalized, w: *std.Io.Writer, fmt: []const u8) !usize {
+        const i = Diagnostics.templateIndex(w, fmt, "{normalized}");
         var it: std.unicode.Utf8Iterator = .{
             .bytes = ctx.str,
             .i = 0,
@@ -557,7 +547,7 @@ const Normalized = struct {
                 });
             }
         }
-        return i + template.len;
+        return i;
     }
 };
 
@@ -568,12 +558,10 @@ const Codepoint = struct {
         return .{ .codepoint = codepoint };
     }
 
-    pub fn format(ctx: Codepoint, w: *std.Io.Writer, fmt_str: []const u8) !usize {
-        const template = "{codepoint}";
-        const i = std.mem.indexOf(u8, fmt_str, template).?;
-        try w.writeAll(fmt_str[0..i]);
+    pub fn format(ctx: Codepoint, w: *std.Io.Writer, fmt: []const u8) !usize {
+        const i = Diagnostics.templateIndex(w, fmt, "{codepoint}");
         try w.print("{X:0>4}", .{ctx.codepoint});
-        return i + template.len;
+        return i;
     }
 };
 
@@ -584,12 +572,10 @@ const Escaped = struct {
         return .{ .str = str };
     }
 
-    pub fn format(ctx: Escaped, w: *std.Io.Writer, fmt_str: []const u8) !usize {
-        const template = "{s}";
-        const i = std.mem.indexOf(u8, fmt_str, template).?;
-        try w.writeAll(fmt_str[0..i]);
+    pub fn format(ctx: Escaped, w: *std.Io.Writer, fmt: []const u8) !usize {
+        const i = Diagnostics.templateIndex(w, fmt, "{s}");
         try std.zig.stringEscape(ctx.str, w);
-        return i + template.len;
+        return i;
     }
 };
 
@@ -626,11 +612,11 @@ pub fn errValueChanged(p: *Parser, tok_i: TokenIndex, diagnostic: Diagnostic, re
 fn checkDeprecatedUnavailable(p: *Parser, ty: QualType, usage_tok: TokenIndex, decl_tok: TokenIndex) !void {
     if (ty.getAttribute(p.comp, .@"error")) |@"error"| {
         const msg_str = p.comp.interner.get(@"error".msg.ref()).bytes;
-        try p.err(usage_tok, .error_attribute, .{ p.tokSlice(@"error".__name_tok), std.zig.fmtString(msg_str) });
+        try p.err(usage_tok, .error_attribute, .{ p.tokSlice(@"error".__name_tok), Escaped.init(msg_str) });
     }
     if (ty.getAttribute(p.comp, .warning)) |warning| {
         const msg_str = p.comp.interner.get(warning.msg.ref()).bytes;
-        try p.err(usage_tok, .warning_attribute, .{ p.tokSlice(warning.__name_tok), std.zig.fmtString(msg_str) });
+        try p.err(usage_tok, .warning_attribute, .{ p.tokSlice(warning.__name_tok), Escaped.init(msg_str) });
     }
     if (ty.getAttribute(p.comp, .unavailable)) |unavailable| {
         try p.errDeprecated(usage_tok, .unavailable, unavailable.msg);
@@ -4734,7 +4720,7 @@ fn asmOperand(p: *Parser, names: *std.ArrayList(?TokenIndex), constraints: *Node
     try constraints.append(gpa, constraint.node);
 
     const l_paren = p.eatToken(.l_paren) orelse {
-        try p.err(p.tok_i, .expected_token, .{ p.tok_ids[p.tok_i], .l_paren });
+        try p.err(p.tok_i, .expected_token, .{ p.tok_ids[p.tok_i], Token.Id.l_paren });
         return error.ParsingFailed;
     };
     const maybe_res = try p.expr();
@@ -10221,12 +10207,30 @@ test "Node locations" {
     try std.testing.expectEqual(0, comp.diagnostics.total);
     for (tree.root_decls.items[tree.root_decls.items.len - 3 ..], 0..) |node, i| {
         const slice = tree.tokSlice(node.tok(&tree));
-        const expected = switch (i) {
+        const expected_slice = switch (i) {
             0 => "foo",
             1 => "bar",
             2 => "main",
             else => unreachable,
         };
-        try std.testing.expectEqualStrings(expected, slice);
+        try std.testing.expectEqualStrings(expected_slice, slice);
+
+        const loc = node.loc(&tree).expand(&comp);
+        const expected_col: u32 = switch (i) {
+            0 => 5,
+            1 => 5,
+            2 => 5,
+            else => unreachable,
+        };
+        try std.testing.expectEqual(expected_col, loc.col);
+
+        const expected_line_no = i + 1;
+        try std.testing.expectEqual(expected_line_no, loc.line_no);
+
+        const expected_source_path = "file.c";
+        try std.testing.expectEqualStrings(expected_source_path, loc.path);
+
+        const expected_source_kind = Source.Kind.user;
+        try std.testing.expectEqual(expected_source_kind, loc.kind);
     }
 }
lib/compiler/aro/aro/Preprocessor.zig
@@ -1703,7 +1703,10 @@ fn expandFuncMacro(
                     else
                         &[1]TokenWithExpansionLocs{tokFromRaw(raw_next)},
                     .macro_param, .macro_param_no_expand => getPasteArgs(args.items[raw_next.end]),
-                    .keyword_va_args => variable_arguments.items,
+                    .keyword_va_args => if (variable_arguments.items.len == 0) blk: {
+                        try pp.err(raw_next, .no_argument_variadic_macro, .{});
+                        break :blk &[1]TokenWithExpansionLocs{.{ .id = .placemarker, .loc = .{ .id = .generated } }};
+                    } else variable_arguments.items,
                     .keyword_va_opt => blk: {
                         try pp.expandVaOpt(&va_opt_buf, raw_next, variable_arguments.items.len != 0);
                         if (va_opt_buf.items.len == 0) break;
lib/compiler/aro/aro/target.zig
@@ -681,10 +681,12 @@ pub fn toLLVMTriple(target: std.Target, buf: []u8) []const u8 {
         .driverkit => "driverkit",
         .visionos => "xros",
         .serenity => "serenity",
+        .vulkan => "vulkan",
         .managarm => "managarm",
+        .@"3ds",
+        .vita,
         .opencl,
         .opengl,
-        .vulkan,
         .plan9,
         .other,
         => "unknown",
lib/compiler/aro/aro/text_literal.zig
@@ -154,17 +154,14 @@ pub const Ascii = struct {
         return .{ .val = @intCast(val) };
     }
 
-    pub fn format(ctx: Ascii, w: *std.Io.Writer, fmt_str: []const u8) !usize {
-        const template = "{c}";
-        const i = std.mem.indexOf(u8, fmt_str, template).?;
-        try w.writeAll(fmt_str[0..i]);
-
+    pub fn format(ctx: Ascii, w: *std.Io.Writer, fmt: []const u8) !usize {
+        const i = Diagnostics.templateIndex(w, fmt, "{c}");
         if (std.ascii.isPrint(ctx.val)) {
             try w.writeByte(ctx.val);
         } else {
             try w.print("x{x:0>2}", .{ctx.val});
         }
-        return i + template.len;
+        return i;
     }
 };
 
@@ -345,7 +342,7 @@ pub const Parser = struct {
                 else => switch (@typeInfo(@TypeOf(arg))) {
                     .int, .comptime_int => try Diagnostics.formatInt(w, fmt[i..], arg),
                     .pointer => try Diagnostics.formatString(w, fmt[i..], arg),
-                    else => unreachable,
+                    else => comptime unreachable,
                 },
             };
         }
lib/compiler/aro/aro/Tree.zig
@@ -1699,9 +1699,9 @@ pub const Node = union(enum) {
             return tree.nodes.items(.tok)[@intFromEnum(index)];
         }
 
-        pub fn loc(index: Index, tree: *const Tree) ?Source.Location {
+        pub fn loc(index: Index, tree: *const Tree) Source.Location {
             const tok_i = index.tok(tree);
-            return tree.tokens.items(.loc)[@intFromEnum(tok_i)];
+            return tree.tokens.items(.loc)[tok_i];
         }
 
         pub fn qt(index: Index, tree: *const Tree) QualType {
lib/compiler/translate-c/ast.zig
@@ -798,9 +798,8 @@ pub const Payload = struct {
 pub fn render(gpa: Allocator, nodes: []const Node) !std.zig.Ast {
     var ctx: Context = .{
         .gpa = gpa,
-        .buf = std.array_list.Managed(u8).init(gpa),
     };
-    defer ctx.buf.deinit();
+    defer ctx.buf.deinit(gpa);
     defer ctx.nodes.deinit(gpa);
     defer ctx.extra_data.deinit(gpa);
     defer ctx.tokens.deinit(gpa);
@@ -813,7 +812,7 @@ pub fn render(gpa: Allocator, nodes: []const Node) !std.zig.Ast {
     try ctx.tokens.ensureTotalCapacity(gpa, estimated_tokens_count);
     // Estimate that each each token is 3 bytes long.
     const estimated_buf_len = estimated_tokens_count * 3;
-    try ctx.buf.ensureTotalCapacity(estimated_buf_len);
+    try ctx.buf.ensureTotalCapacity(gpa, estimated_buf_len);
 
     ctx.nodes.appendAssumeCapacity(.{
         .tag = .root,
@@ -822,12 +821,12 @@ pub fn render(gpa: Allocator, nodes: []const Node) !std.zig.Ast {
     });
 
     const root_members = blk: {
-        var result = std.array_list.Managed(NodeIndex).init(gpa);
-        defer result.deinit();
+        var result: std.ArrayList(NodeIndex) = .empty;
+        defer result.deinit(gpa);
 
         for (nodes) |node| {
             const res = (try renderNodeOpt(&ctx, node)) orelse continue;
-            try result.append(res);
+            try result.append(gpa, res);
         }
         break :blk try ctx.listToSpan(result.items);
     };
@@ -843,7 +842,7 @@ pub fn render(gpa: Allocator, nodes: []const Node) !std.zig.Ast {
     });
 
     return .{
-        .source = try ctx.buf.toOwnedSliceSentinel(0),
+        .source = try ctx.buf.toOwnedSliceSentinel(gpa, 0),
         .tokens = ctx.tokens.toOwnedSlice(),
         .nodes = ctx.nodes.toOwnedSlice(),
         .extra_data = try ctx.extra_data.toOwnedSlice(gpa),
@@ -859,14 +858,14 @@ const TokenTag = std.zig.Token.Tag;
 
 const Context = struct {
     gpa: Allocator,
-    buf: std.array_list.Managed(u8),
-    nodes: std.zig.Ast.NodeList = .{},
+    buf: std.ArrayList(u8) = .empty,
+    nodes: std.zig.Ast.NodeList = .empty,
     extra_data: std.ArrayListUnmanaged(u32) = .empty,
-    tokens: std.zig.Ast.TokenList = .{},
+    tokens: std.zig.Ast.TokenList = .empty,
 
     fn addTokenFmt(c: *Context, tag: TokenTag, comptime format: []const u8, args: anytype) Allocator.Error!TokenIndex {
         const start_index = c.buf.items.len;
-        try c.buf.print(format ++ " ", args);
+        try c.buf.print(c.gpa, format ++ " ", args);
 
         try c.tokens.append(c.gpa, .{
             .tag = tag,
@@ -925,8 +924,8 @@ fn renderNodeOpt(c: *Context, node: Node) Allocator.Error!?NodeIndex {
     switch (node.tag()) {
         .warning => {
             const payload = node.castTag(.warning).?.data;
-            try c.buf.appendSlice(payload);
-            try c.buf.append('\n');
+            try c.buf.appendSlice(c.gpa, payload);
+            try c.buf.append(c.gpa, '\n');
             return null;
         },
         .discard => {
@@ -1687,12 +1686,12 @@ fn renderNode(c: *Context, node: Node) Allocator.Error!NodeIndex {
             }
             const l_brace = try c.addToken(.l_brace, "{");
 
-            var stmts = std.array_list.Managed(NodeIndex).init(c.gpa);
-            defer stmts.deinit();
+            var stmts: std.ArrayList(NodeIndex) = .empty;
+            defer stmts.deinit(c.gpa);
             for (payload.stmts) |stmt| {
                 const res = (try renderNodeOpt(c, stmt)) orelse continue;
                 try addSemicolonIfNeeded(c, stmt);
-                try stmts.append(res);
+                try stmts.append(c.gpa, res);
             }
             const span = try c.listToSpan(stmts.items);
             _ = try c.addToken(.r_brace, "}");
@@ -2830,8 +2829,8 @@ fn renderFunc(c: *Context, node: Node) !NodeIndex {
     const fn_token = try c.addToken(.keyword_fn, "fn");
     if (payload.name) |some| _ = try c.addIdentifier(some);
 
-    const params = try renderParams(c, payload.params, payload.is_var_args);
-    defer params.deinit();
+    var params = try renderParams(c, payload.params, payload.is_var_args);
+    defer params.deinit(c.gpa);
     var span: NodeSubRange = undefined;
     if (params.items.len > 1) span = try c.listToSpan(params.items);
 
@@ -2998,8 +2997,8 @@ fn renderMacroFunc(c: *Context, node: Node) !NodeIndex {
     const fn_token = try c.addToken(.keyword_fn, "fn");
     _ = try c.addIdentifier(payload.name);
 
-    const params = try renderParams(c, payload.params, false);
-    defer params.deinit();
+    var params = try renderParams(c, payload.params, false);
+    defer params.deinit(c.gpa);
     var span: NodeSubRange = undefined;
     if (params.items.len > 1) span = try c.listToSpan(params.items);
 
@@ -3035,10 +3034,11 @@ fn renderMacroFunc(c: *Context, node: Node) !NodeIndex {
     });
 }
 
-fn renderParams(c: *Context, params: []Payload.Param, is_var_args: bool) !std.array_list.Managed(NodeIndex) {
+fn renderParams(c: *Context, params: []Payload.Param, is_var_args: bool) !std.ArrayList(NodeIndex) {
     _ = try c.addToken(.l_paren, "(");
-    var rendered = try std.array_list.Managed(NodeIndex).initCapacity(c.gpa, @max(params.len, 1));
-    errdefer rendered.deinit();
+    var rendered: std.ArrayList(NodeIndex) = .empty;
+    errdefer rendered.deinit(c.gpa);
+    try rendered.ensureUnusedCapacity(c.gpa, @max(params.len, 1));
 
     for (params, 0..) |param, i| {
         if (i != 0) _ = try c.addToken(.comma, ",");
lib/compiler/translate-c/MacroTranslator.zig
@@ -175,8 +175,10 @@ pub fn transMacro(mt: *MacroTranslator) ParseError!void {
 }
 
 fn createMacroFn(mt: *MacroTranslator, name: []const u8, ref: ZigNode, proto_alias: *ast.Payload.Func) !ZigNode {
-    var fn_params = std.array_list.Managed(ast.Payload.Param).init(mt.t.gpa);
-    defer fn_params.deinit();
+    const gpa = mt.t.gpa;
+    const arena = mt.t.arena;
+    var fn_params: std.ArrayList(ast.Payload.Param) = .empty;
+    defer fn_params.deinit(gpa);
 
     var block_scope = try Scope.Block.init(mt.t, &mt.t.global_scope.base, false);
     defer block_scope.deinit();
@@ -184,7 +186,7 @@ fn createMacroFn(mt: *MacroTranslator, name: []const u8, ref: ZigNode, proto_ali
     for (proto_alias.data.params) |param| {
         const param_name = try block_scope.makeMangledName(param.name orelse "arg");
 
-        try fn_params.append(.{
+        try fn_params.append(gpa, .{
             .name = param_name,
             .type = param.type,
             .is_noalias = param.is_noalias,
@@ -198,27 +200,28 @@ fn createMacroFn(mt: *MacroTranslator, name: []const u8, ref: ZigNode, proto_ali
     else
         unreachable;
 
-    const unwrap_expr = try ZigTag.unwrap.create(mt.t.arena, init);
-    const args = try mt.t.arena.alloc(ZigNode, fn_params.items.len);
+    const unwrap_expr = try ZigTag.unwrap.create(arena, init);
+    const args = try arena.alloc(ZigNode, fn_params.items.len);
     for (fn_params.items, 0..) |param, i| {
-        args[i] = try ZigTag.identifier.create(mt.t.arena, param.name.?);
+        args[i] = try ZigTag.identifier.create(arena, param.name.?);
     }
-    const call_expr = try ZigTag.call.create(mt.t.arena, .{
+    const call_expr = try ZigTag.call.create(arena, .{
         .lhs = unwrap_expr,
         .args = args,
     });
-    const return_expr = try ZigTag.@"return".create(mt.t.arena, call_expr);
-    const block = try ZigTag.block_single.create(mt.t.arena, return_expr);
+    const return_expr = try ZigTag.@"return".create(arena, call_expr);
+    const block = try ZigTag.block_single.create(arena, return_expr);
 
-    return ZigTag.pub_inline_fn.create(mt.t.arena, .{
+    return ZigTag.pub_inline_fn.create(arena, .{
         .name = name,
-        .params = try mt.t.arena.dupe(ast.Payload.Param, fn_params.items),
+        .params = try arena.dupe(ast.Payload.Param, fn_params.items),
         .return_type = proto_alias.data.return_type,
         .body = block,
     });
 }
 
 fn parseCExpr(mt: *MacroTranslator, scope: *Scope) ParseError!ZigNode {
+    const arena = mt.t.arena;
     // TODO parseCAssignExpr here
     var block_scope = try Scope.Block.init(mt.t, scope, true);
     defer block_scope.deinit();
@@ -229,14 +232,14 @@ fn parseCExpr(mt: *MacroTranslator, scope: *Scope) ParseError!ZigNode {
     var last = node;
     while (true) {
         // suppress result
-        const ignore = try ZigTag.discard.create(mt.t.arena, .{ .should_skip = false, .value = last });
+        const ignore = try ZigTag.discard.create(arena, .{ .should_skip = false, .value = last });
         try block_scope.statements.append(mt.t.gpa, ignore);
 
         last = try mt.parseCCondExpr(&block_scope.base);
         if (!mt.eat(.comma)) break;
     }
 
-    const break_node = try ZigTag.break_val.create(mt.t.arena, .{
+    const break_node = try ZigTag.break_val.create(arena, .{
         .label = block_scope.label,
         .val = last,
     });
@@ -245,10 +248,11 @@ fn parseCExpr(mt: *MacroTranslator, scope: *Scope) ParseError!ZigNode {
 }
 
 fn parseCNumLit(mt: *MacroTranslator) ParseError!ZigNode {
+    const arena = mt.t.arena;
     const lit_bytes = mt.tokSlice();
     mt.i += 1;
 
-    var bytes = try std.ArrayListUnmanaged(u8).initCapacity(mt.t.arena, lit_bytes.len + 3);
+    var bytes = try std.ArrayListUnmanaged(u8).initCapacity(arena, lit_bytes.len + 3);
 
     const prefix = aro.Tree.Token.NumberPrefix.fromString(lit_bytes);
     switch (prefix) {
@@ -330,7 +334,7 @@ fn parseCNumLit(mt: *MacroTranslator) ParseError!ZigNode {
     }
 
     if (is_float) {
-        const type_node = try ZigTag.type.create(mt.t.arena, switch (suffix) {
+        const type_node = try ZigTag.type.create(arena, switch (suffix) {
             .F16 => "f16",
             .F => "f32",
             .None => "f64",
@@ -339,10 +343,10 @@ fn parseCNumLit(mt: *MacroTranslator) ParseError!ZigNode {
             .Q, .F128 => "f128",
             else => unreachable,
         });
-        const rhs = try ZigTag.float_literal.create(mt.t.arena, bytes.items);
-        return ZigTag.as.create(mt.t.arena, .{ .lhs = type_node, .rhs = rhs });
+        const rhs = try ZigTag.float_literal.create(arena, bytes.items);
+        return ZigTag.as.create(arena, .{ .lhs = type_node, .rhs = rhs });
     } else {
-        const type_node = try ZigTag.type.create(mt.t.arena, switch (suffix) {
+        const type_node = try ZigTag.type.create(arena, switch (suffix) {
             .None => "c_int",
             .U => "c_uint",
             .L => "c_long",
@@ -365,11 +369,11 @@ fn parseCNumLit(mt: *MacroTranslator) ParseError!ZigNode {
             else => unreachable,
         };
 
-        const literal_node = try ZigTag.integer_literal.create(mt.t.arena, bytes.items);
+        const literal_node = try ZigTag.integer_literal.create(arena, bytes.items);
         if (guaranteed_to_fit) {
-            return ZigTag.as.create(mt.t.arena, .{ .lhs = type_node, .rhs = literal_node });
+            return ZigTag.as.create(arena, .{ .lhs = type_node, .rhs = literal_node });
         } else {
-            return mt.t.createHelperCallNode(.promoteIntLiteral, &.{ type_node, literal_node, try ZigTag.enum_literal.create(mt.t.arena, @tagName(prefix)) });
+            return mt.t.createHelperCallNode(.promoteIntLiteral, &.{ type_node, literal_node, try ZigTag.enum_literal.create(arena, @tagName(prefix)) });
         }
     }
 }
@@ -563,6 +567,7 @@ fn escapeUnprintables(mt: *MacroTranslator) ![]const u8 {
 }
 
 fn parseCPrimaryExpr(mt: *MacroTranslator, scope: *Scope) ParseError!ZigNode {
+    const arena = mt.t.arena;
     const tok = mt.peek();
     switch (tok) {
         .char_literal,
@@ -573,12 +578,12 @@ fn parseCPrimaryExpr(mt: *MacroTranslator, scope: *Scope) ParseError!ZigNode {
         => {
             const slice = mt.tokSlice();
             if (slice[0] != '\'' or slice[1] == '\\' or slice.len == 3) {
-                return ZigTag.char_literal.create(mt.t.arena, try mt.escapeUnprintables());
+                return ZigTag.char_literal.create(arena, try mt.escapeUnprintables());
             } else {
                 mt.i += 1;
 
-                const str = try std.fmt.allocPrint(mt.t.arena, "0x{x}", .{slice[1 .. slice.len - 1]});
-                return ZigTag.integer_literal.create(mt.t.arena, str);
+                const str = try std.fmt.allocPrint(arena, "0x{x}", .{slice[1 .. slice.len - 1]});
+                return ZigTag.integer_literal.create(arena, str);
             }
         },
         .string_literal,
@@ -586,7 +591,7 @@ fn parseCPrimaryExpr(mt: *MacroTranslator, scope: *Scope) ParseError!ZigNode {
         .string_literal_utf_8,
         .string_literal_utf_32,
         .string_literal_wide,
-        => return ZigTag.string_literal.create(mt.t.arena, try mt.escapeUnprintables()),
+        => return ZigTag.string_literal.create(arena, try mt.escapeUnprintables()),
         .pp_num => return mt.parseCNumLit(),
         .l_paren => {
             mt.i += 1;
@@ -600,7 +605,7 @@ fn parseCPrimaryExpr(mt: *MacroTranslator, scope: *Scope) ParseError!ZigNode {
             mt.i += 1;
 
             const mangled_name = scope.getAlias(param) orelse param;
-            return try ZigTag.identifier.create(mt.t.arena, mangled_name);
+            return try ZigTag.identifier.create(arena, mangled_name);
         },
         .identifier, .extended_identifier => {
             const slice = mt.tokSlice();
@@ -608,17 +613,17 @@ fn parseCPrimaryExpr(mt: *MacroTranslator, scope: *Scope) ParseError!ZigNode {
 
             const mangled_name = scope.getAlias(slice) orelse slice;
             if (Translator.builtin_typedef_map.get(mangled_name)) |ty| {
-                return ZigTag.type.create(mt.t.arena, ty);
+                return ZigTag.type.create(arena, ty);
             }
             if (builtins.map.get(mangled_name)) |builtin| {
-                const builtin_identifier = try ZigTag.identifier.create(mt.t.arena, "__builtin");
-                return ZigTag.field_access.create(mt.t.arena, .{
+                const builtin_identifier = try ZigTag.identifier.create(arena, "__builtin");
+                return ZigTag.field_access.create(arena, .{
                     .lhs = builtin_identifier,
                     .field_name = builtin.name,
                 });
             }
 
-            const identifier = try ZigTag.identifier.create(mt.t.arena, mangled_name);
+            const identifier = try ZigTag.identifier.create(arena, mangled_name);
             scope.skipVariableDiscard(mangled_name);
             refs_var: {
                 const ident_node = mt.t.global_scope.sym_table.get(slice) orelse break :refs_var;
@@ -1114,6 +1119,8 @@ fn parseCPostfixExpr(mt: *MacroTranslator, scope: *Scope, type_name: ?ZigNode) P
 }
 
 fn parseCPostfixExprInner(mt: *MacroTranslator, scope: *Scope, type_name: ?ZigNode) ParseError!ZigNode {
+    const gpa = mt.t.gpa;
+    const arena = mt.t.arena;
     var node = type_name orelse try mt.parseCPrimaryExpr(scope);
     while (true) {
         switch (mt.peek()) {
@@ -1122,39 +1129,39 @@ fn parseCPostfixExprInner(mt: *MacroTranslator, scope: *Scope, type_name: ?ZigNo
                 const field_name = mt.tokSlice();
                 try mt.expect(.identifier);
 
-                node = try ZigTag.field_access.create(mt.t.arena, .{ .lhs = node, .field_name = field_name });
+                node = try ZigTag.field_access.create(arena, .{ .lhs = node, .field_name = field_name });
             },
             .arrow => {
                 mt.i += 1;
                 const field_name = mt.tokSlice();
                 try mt.expect(.identifier);
 
-                const deref = try ZigTag.deref.create(mt.t.arena, node);
-                node = try ZigTag.field_access.create(mt.t.arena, .{ .lhs = deref, .field_name = field_name });
+                const deref = try ZigTag.deref.create(arena, node);
+                node = try ZigTag.field_access.create(arena, .{ .lhs = deref, .field_name = field_name });
             },
             .l_bracket => {
                 mt.i += 1;
 
                 const index_val = try mt.macroIntFromBool(try mt.parseCExpr(scope));
-                const index = try ZigTag.as.create(mt.t.arena, .{
-                    .lhs = try ZigTag.type.create(mt.t.arena, "usize"),
-                    .rhs = try ZigTag.int_cast.create(mt.t.arena, index_val),
+                const index = try ZigTag.as.create(arena, .{
+                    .lhs = try ZigTag.type.create(arena, "usize"),
+                    .rhs = try ZigTag.int_cast.create(arena, index_val),
                 });
-                node = try ZigTag.array_access.create(mt.t.arena, .{ .lhs = node, .rhs = index });
+                node = try ZigTag.array_access.create(arena, .{ .lhs = node, .rhs = index });
                 try mt.expect(.r_bracket);
             },
             .l_paren => {
                 mt.i += 1;
 
                 if (mt.eat(.r_paren)) {
-                    node = try ZigTag.call.create(mt.t.arena, .{ .lhs = node, .args = &.{} });
+                    node = try ZigTag.call.create(arena, .{ .lhs = node, .args = &.{} });
                 } else {
-                    var args = std.array_list.Managed(ZigNode).init(mt.t.gpa);
-                    defer args.deinit();
+                    var args: std.ArrayList(ZigNode) = .empty;
+                    defer args.deinit(gpa);
 
                     while (true) {
                         const arg = try mt.parseCCondExpr(scope);
-                        try args.append(arg);
+                        try args.append(gpa, arg);
 
                         const next_id = mt.peek();
                         switch (next_id) {
@@ -1171,7 +1178,7 @@ fn parseCPostfixExprInner(mt: *MacroTranslator, scope: *Scope, type_name: ?ZigNo
                             },
                         }
                     }
-                    node = try ZigTag.call.create(mt.t.arena, .{ .lhs = node, .args = try mt.t.arena.dupe(ZigNode, args.items) });
+                    node = try ZigTag.call.create(arena, .{ .lhs = node, .args = try arena.dupe(ZigNode, args.items) });
                 }
             },
             .l_brace => {
@@ -1179,8 +1186,8 @@ fn parseCPostfixExprInner(mt: *MacroTranslator, scope: *Scope, type_name: ?ZigNo
 
                 // Check for designated field initializers
                 if (mt.peek() == .period) {
-                    var init_vals = std.array_list.Managed(ast.Payload.ContainerInitDot.Initializer).init(mt.t.gpa);
-                    defer init_vals.deinit();
+                    var init_vals: std.ArrayList(ast.Payload.ContainerInitDot.Initializer) = .empty;
+                    defer init_vals.deinit(gpa);
 
                     while (true) {
                         try mt.expect(.period);
@@ -1189,7 +1196,7 @@ fn parseCPostfixExprInner(mt: *MacroTranslator, scope: *Scope, type_name: ?ZigNo
                         try mt.expect(.equal);
 
                         const val = try mt.parseCCondExpr(scope);
-                        try init_vals.append(.{ .name = name, .value = val });
+                        try init_vals.append(gpa, .{ .name = name, .value = val });
 
                         const next_id = mt.peek();
                         switch (next_id) {
@@ -1206,17 +1213,17 @@ fn parseCPostfixExprInner(mt: *MacroTranslator, scope: *Scope, type_name: ?ZigNo
                             },
                         }
                     }
-                    const tuple_node = try ZigTag.container_init_dot.create(mt.t.arena, try mt.t.arena.dupe(ast.Payload.ContainerInitDot.Initializer, init_vals.items));
-                    node = try ZigTag.std_mem_zeroinit.create(mt.t.arena, .{ .lhs = node, .rhs = tuple_node });
+                    const tuple_node = try ZigTag.container_init_dot.create(arena, try arena.dupe(ast.Payload.ContainerInitDot.Initializer, init_vals.items));
+                    node = try ZigTag.std_mem_zeroinit.create(arena, .{ .lhs = node, .rhs = tuple_node });
                     continue;
                 }
 
-                var init_vals = std.array_list.Managed(ZigNode).init(mt.t.gpa);
-                defer init_vals.deinit();
+                var init_vals: std.ArrayList(ZigNode) = .empty;
+                defer init_vals.deinit(gpa);
 
                 while (true) {
                     const val = try mt.parseCCondExpr(scope);
-                    try init_vals.append(val);
+                    try init_vals.append(gpa, val);
 
                     const next_id = mt.peek();
                     switch (next_id) {
@@ -1233,8 +1240,8 @@ fn parseCPostfixExprInner(mt: *MacroTranslator, scope: *Scope, type_name: ?ZigNo
                         },
                     }
                 }
-                const tuple_node = try ZigTag.tuple.create(mt.t.arena, try mt.t.arena.dupe(ZigNode, init_vals.items));
-                node = try ZigTag.std_mem_zeroinit.create(mt.t.arena, .{ .lhs = node, .rhs = tuple_node });
+                const tuple_node = try ZigTag.tuple.create(arena, try arena.dupe(ZigNode, init_vals.items));
+                node = try ZigTag.std_mem_zeroinit.create(arena, .{ .lhs = node, .rhs = tuple_node });
             },
             .plus_plus, .minus_minus => {
                 try mt.fail("TODO postfix inc/dec expr", .{});
lib/compiler/translate-c/main.zig
@@ -110,7 +110,7 @@ fn translate(d: *aro.Driver, tc: *aro.Toolchain, args: [][:0]u8) !void {
         defer macro_buf.deinit(gpa);
 
         var discard_buf: [256]u8 = undefined;
-        var discarding: std.io.Writer.Discarding = .init(&discard_buf);
+        var discarding: std.Io.Writer.Discarding = .init(&discard_buf);
         assert(!try d.parseArgs(&discarding.writer, &macro_buf, aro_args));
         if (macro_buf.items.len > std.math.maxInt(u32)) {
             return d.fatal("user provided macro source exceeded max size", .{});
@@ -206,9 +206,11 @@ fn translate(d: *aro.Driver, tc: *aro.Toolchain, args: [][:0]u8) !void {
         out_file_path = path;
     }
 
-    var out_writer = out_file.writer(&.{});
-    out_writer.interface.writeAll(rendered_zig) catch
-        return d.fatal("failed to write result to '{s}': {s}", .{ out_file_path, aro.Driver.errorDescription(out_writer.err.?) });
+    var out_writer = out_file.writer(&out_buf);
+    out_writer.interface.writeAll(rendered_zig) catch {};
+    out_writer.interface.flush() catch {};
+    if (out_writer.err) |write_err|
+        return d.fatal("failed to write result to '{s}': {s}", .{ out_file_path, aro.Driver.errorDescription(write_err) });
 
     if (fast_exit) process.exit(0);
 }
lib/compiler/translate-c/PatternList.zig
@@ -91,11 +91,11 @@ const Pattern = struct {
     fn init(pl: *Pattern, allocator: mem.Allocator, template: Template) Error!void {
         const source = template[0];
         const impl = template[1];
-        var tok_list = std.array_list.Managed(CToken).init(allocator);
-        defer tok_list.deinit();
+        var tok_list: std.ArrayList(CToken) = .empty;
+        defer tok_list.deinit(allocator);
 
         pl.* = .{
-            .slicer = try tokenizeMacro(source, &tok_list),
+            .slicer = try tokenizeMacro(allocator, source, &tok_list),
             .impl = impl,
         };
     }
@@ -170,7 +170,7 @@ pub fn match(pl: PatternList, ms: MacroSlicer) Error!?Impl {
     return null;
 }
 
-fn tokenizeMacro(source: []const u8, tok_list: *std.array_list.Managed(CToken)) Error!MacroSlicer {
+fn tokenizeMacro(allocator: mem.Allocator, source: []const u8, tok_list: *std.ArrayList(CToken)) Error!MacroSlicer {
     var param_count: u32 = 0;
     var param_buf: [8][]const u8 = undefined;
 
@@ -207,7 +207,7 @@ fn tokenizeMacro(source: []const u8, tok_list: *std.array_list.Managed(CToken))
                 const slice = source[tok.start..tok.end];
                 for (param_buf[0..param_count], 0..) |param, i| {
                     if (std.mem.eql(u8, param, slice)) {
-                        try tok_list.append(.{
+                        try tok_list.append(allocator, .{
                             .id = .macro_param,
                             .source = .unused,
                             .end = @intCast(i),
@@ -224,12 +224,12 @@ fn tokenizeMacro(source: []const u8, tok_list: *std.array_list.Managed(CToken))
             .nl, .eof => break,
             else => {},
         }
-        try tok_list.append(tok);
+        try tok_list.append(allocator, tok);
     }
 
     return .{
         .source = source,
-        .tokens = try tok_list.toOwnedSlice(),
+        .tokens = try tok_list.toOwnedSlice(allocator),
         .params = param_count,
     };
 }
@@ -243,9 +243,9 @@ test "Macro matching" {
             source: []const u8,
             comptime expected_match: ?Impl,
         ) !void {
-            var tok_list = std.array_list.Managed(CToken).init(allocator);
-            defer tok_list.deinit();
-            const ms = try tokenizeMacro(source, &tok_list);
+            var tok_list: std.ArrayList(CToken) = .empty;
+            defer tok_list.deinit(allocator);
+            const ms = try tokenizeMacro(allocator, source, &tok_list);
             defer allocator.free(ms.tokens);
 
             const matched = try pattern_list.match(ms);
lib/compiler/translate-c/Translator.zig
@@ -216,10 +216,10 @@ pub fn translate(options: Options) mem.Allocator.Error![]u8 {
 
     try translator.global_scope.processContainerMemberFns();
 
-    var aw: std.Io.Writer.Allocating = .init(gpa);
-    defer aw.deinit();
+    var allocating: std.Io.Writer.Allocating = .init(gpa);
+    defer allocating.deinit();
 
-    aw.writer.writeAll(
+    allocating.writer.writeAll(
         \\pub const __builtin = @import("std").zig.c_translation.builtins;
         \\pub const __helpers = @import("std").zig.c_translation.helpers;
         \\
@@ -231,8 +231,8 @@ pub fn translate(options: Options) mem.Allocator.Error![]u8 {
         gpa.free(zig_ast.source);
         zig_ast.deinit(gpa);
     }
-    zig_ast.render(gpa, &aw.writer, .{}) catch return error.OutOfMemory;
-    return aw.toOwnedSlice();
+    zig_ast.render(gpa, &allocating.writer, .{}) catch return error.OutOfMemory;
+    return allocating.toOwnedSlice();
 }
 
 fn prepopulateGlobalNameTable(t: *Translator) !void {
@@ -489,11 +489,12 @@ fn transRecordDecl(t: *Translator, scope: *Scope, record_qt: QualType) Error!voi
             break :init ZigTag.opaque_literal.init();
         }
 
-        var fields = try std.array_list.Managed(ast.Payload.Container.Field).initCapacity(t.gpa, record_ty.fields.len);
-        defer fields.deinit();
+        var fields: std.ArrayList(ast.Payload.Container.Field) = .empty;
+        defer fields.deinit(t.gpa);
+        try fields.ensureUnusedCapacity(t.gpa, record_ty.fields.len);
 
-        var functions = std.array_list.Managed(ZigNode).init(t.gpa);
-        defer functions.deinit();
+        var functions: std.ArrayList(ZigNode) = .empty;
+        defer functions.deinit(t.gpa);
 
         var unnamed_field_count: u32 = 0;
 
@@ -558,7 +559,7 @@ fn transRecordDecl(t: *Translator, scope: *Scope, record_qt: QualType) Error!voi
                     field_name = try std.fmt.allocPrint(t.arena, "_{s}", .{field_name});
 
                     const member = try t.createFlexibleMemberFn(member_name, field_name);
-                    try functions.append(member);
+                    try functions.append(t.gpa, member);
 
                     break :field_type zero_array;
                 }
@@ -600,7 +601,7 @@ fn transRecordDecl(t: *Translator, scope: *Scope, record_qt: QualType) Error!voi
             const padding_bits = record_ty.layout.?.size_bits;
             const alignment_bits = record_ty.layout.?.field_alignment_bits;
 
-            try fields.append(.{
+            try fields.append(t.gpa, .{
                 .name = "_padding",
                 .type = try ZigTag.type.create(t.arena, try std.fmt.allocPrint(t.arena, "u{d}", .{padding_bits})),
                 .alignment = @divExact(alignment_bits, 8),
@@ -1789,8 +1790,8 @@ fn transSwitch(t: *Translator, scope: *Scope, switch_stmt: Node.SwitchStmt) Tran
     defer cond_scope.deinit();
     const switch_expr = try t.transExpr(&cond_scope.base, switch_stmt.cond, .used);
 
-    var cases = std.array_list.Managed(ZigNode).init(t.gpa);
-    defer cases.deinit();
+    var cases: std.ArrayList(ZigNode) = .empty;
+    defer cases.deinit(t.gpa);
     var has_default = false;
 
     const body_node = switch_stmt.body.get(t.tree);
@@ -1803,21 +1804,21 @@ fn transSwitch(t: *Translator, scope: *Scope, switch_stmt: Node.SwitchStmt) Tran
     for (body, 0..) |stmt, i| {
         switch (stmt.get(t.tree)) {
             .case_stmt => {
-                var items = std.array_list.Managed(ZigNode).init(t.gpa);
-                defer items.deinit();
+                var items: std.ArrayList(ZigNode) = .empty;
+                defer items.deinit(t.gpa);
                 const sub = try t.transCaseStmt(base_scope, stmt, &items);
                 const res = try t.transSwitchProngStmt(base_scope, sub, body[i..]);
 
                 if (items.items.len == 0) {
                     has_default = true;
                     const switch_else = try ZigTag.switch_else.create(t.arena, res);
-                    try cases.append(switch_else);
+                    try cases.append(t.gpa, switch_else);
                 } else {
                     const switch_prong = try ZigTag.switch_prong.create(t.arena, .{
                         .cases = try t.arena.dupe(ZigNode, items.items),
                         .cond = res,
                     });
-                    try cases.append(switch_prong);
+                    try cases.append(t.gpa, switch_prong);
                 }
             },
             .default_stmt => |default_stmt| {
@@ -1833,7 +1834,7 @@ fn transSwitch(t: *Translator, scope: *Scope, switch_stmt: Node.SwitchStmt) Tran
                 const res = try t.transSwitchProngStmt(base_scope, sub, body[i..]);
 
                 const switch_else = try ZigTag.switch_else.create(t.arena, res);
-                try cases.append(switch_else);
+                try cases.append(t.gpa, switch_else);
             },
             else => {}, // collected in transSwitchProngStmt
         }
@@ -1841,7 +1842,7 @@ fn transSwitch(t: *Translator, scope: *Scope, switch_stmt: Node.SwitchStmt) Tran
 
     if (!has_default) {
         const else_prong = try ZigTag.switch_else.create(t.arena, ZigTag.empty_block.init());
-        try cases.append(else_prong);
+        try cases.append(t.gpa, else_prong);
     }
 
     const switch_node = try ZigTag.@"switch".create(t.arena, .{
@@ -1861,7 +1862,7 @@ fn transCaseStmt(
     t: *Translator,
     scope: *Scope,
     stmt: Node.Index,
-    items: *std.array_list.Managed(ZigNode),
+    items: *std.ArrayList(ZigNode),
 ) TransError!Node.Index {
     var sub = stmt;
     var seen_default = false;
@@ -1886,7 +1887,7 @@ fn transCaseStmt(
                     break :blk try ZigTag.ellipsis3.create(t.arena, .{ .lhs = start_node, .rhs = end_node });
                 } else try t.transExpr(scope, case_stmt.start, .used);
 
-                try items.append(expr);
+                try items.append(t.gpa, expr);
                 sub = case_stmt.body;
             },
             else => return sub,
@@ -3873,7 +3874,7 @@ fn createNumberNode(t: *Translator, num: anytype, num_kind: enum { int, float })
 
 fn createCharLiteralNode(t: *Translator, narrow: bool, val: u32) TransError!ZigNode {
     return ZigTag.char_literal.create(t.arena, if (narrow)
-        try std.fmt.allocPrint(t.arena, "'{f}'", .{std.zig.fmtChar(@intCast(val))})
+        try std.fmt.allocPrint(t.arena, "'{f}'", .{std.zig.fmtChar(@as(u8, @intCast(val)))})
     else
         try std.fmt.allocPrint(t.arena, "'\\u{{{x}}}'", .{val}));
 }
@@ -3986,8 +3987,8 @@ fn createFlexibleMemberFn(
 // =================
 
 fn transMacros(t: *Translator) !void {
-    var tok_list = std.array_list.Managed(CToken).init(t.gpa);
-    defer tok_list.deinit();
+    var tok_list: std.ArrayList(CToken) = .empty;
+    defer tok_list.deinit(t.gpa);
 
     var pattern_list = try PatternList.init(t.gpa);
     defer pattern_list.deinit(t.gpa);
@@ -3999,7 +4000,7 @@ fn transMacros(t: *Translator) !void {
         }
 
         tok_list.items.len = 0;
-        try tok_list.ensureUnusedCapacity(macro.tokens.len);
+        try tok_list.ensureUnusedCapacity(t.gpa, macro.tokens.len);
         for (macro.tokens) |tok| {
             switch (tok.id) {
                 .invalid => continue,