More stage1 test coverage

lib/std/io/reader.zig

@@ -280,28 +280,28 @@ pub fn Reader(
 
         /// Reads a native-endian integer
         pub fn readIntNative(self: Self, comptime T: type) (Error || error{EndOfStream})!T {
-            const bytes = try self.readBytesNoEof((@typeInfo(T).Int.bits + 7) / 8);
+            const bytes = try self.readBytesNoEof(@as(u16, @intCast((@as(u17, @typeInfo(T).Int.bits) + 7) / 8)));
             return mem.readIntNative(T, &bytes);
         }
 
         /// Reads a foreign-endian integer
         pub fn readIntForeign(self: Self, comptime T: type) (Error || error{EndOfStream})!T {
-            const bytes = try self.readBytesNoEof((@typeInfo(T).Int.bits + 7) / 8);
+            const bytes = try self.readBytesNoEof(@as(u16, @intCast((@as(u17, @typeInfo(T).Int.bits) + 7) / 8)));
             return mem.readIntForeign(T, &bytes);
         }
 
         pub fn readIntLittle(self: Self, comptime T: type) !T {
-            const bytes = try self.readBytesNoEof((@typeInfo(T).Int.bits + 7) / 8);
+            const bytes = try self.readBytesNoEof(@as(u16, @intCast((@as(u17, @typeInfo(T).Int.bits) + 7) / 8)));
             return mem.readIntLittle(T, &bytes);
         }
 
         pub fn readIntBig(self: Self, comptime T: type) !T {
-            const bytes = try self.readBytesNoEof((@typeInfo(T).Int.bits + 7) / 8);
+            const bytes = try self.readBytesNoEof(@as(u16, @intCast((@as(u17, @typeInfo(T).Int.bits) + 7) / 8)));
             return mem.readIntBig(T, &bytes);
         }
 
         pub fn readInt(self: Self, comptime T: type, endian: std.builtin.Endian) !T {
-            const bytes = try self.readBytesNoEof((@typeInfo(T).Int.bits + 7) / 8);
+            const bytes = try self.readBytesNoEof(@as(u16, @intCast((@as(u17, @typeInfo(T).Int.bits) + 7) / 8)));
             return mem.readInt(T, &bytes, endian);
         }
 

lib/std/io/writer.zig

@@ -47,32 +47,32 @@ pub fn Writer(
 
         /// Write a native-endian integer.
         pub fn writeIntNative(self: Self, comptime T: type, value: T) Error!void {
-            var bytes: [(@typeInfo(T).Int.bits + 7) / 8]u8 = undefined;
+            var bytes: [@as(u16, @intCast((@as(u17, @typeInfo(T).Int.bits) + 7) / 8))]u8 = undefined;
             mem.writeIntNative(std.math.ByteAlignedInt(@TypeOf(value)), &bytes, value);
             return self.writeAll(&bytes);
         }
 
         /// Write a foreign-endian integer.
         pub fn writeIntForeign(self: Self, comptime T: type, value: T) Error!void {
-            var bytes: [(@typeInfo(T).Int.bits + 7) / 8]u8 = undefined;
+            var bytes: [@as(u16, @intCast((@as(u17, @typeInfo(T).Int.bits) + 7) / 8))]u8 = undefined;
             mem.writeIntForeign(std.math.ByteAlignedInt(@TypeOf(value)), &bytes, value);
             return self.writeAll(&bytes);
         }
 
         pub fn writeIntLittle(self: Self, comptime T: type, value: T) Error!void {
-            var bytes: [(@typeInfo(T).Int.bits + 7) / 8]u8 = undefined;
+            var bytes: [@as(u16, @intCast((@as(u17, @typeInfo(T).Int.bits) + 7) / 8))]u8 = undefined;
             mem.writeIntLittle(std.math.ByteAlignedInt(@TypeOf(value)), &bytes, value);
             return self.writeAll(&bytes);
         }
 
         pub fn writeIntBig(self: Self, comptime T: type, value: T) Error!void {
-            var bytes: [(@typeInfo(T).Int.bits + 7) / 8]u8 = undefined;
+            var bytes: [@as(u16, @intCast((@as(u17, @typeInfo(T).Int.bits) + 7) / 8))]u8 = undefined;
             mem.writeIntBig(std.math.ByteAlignedInt(@TypeOf(value)), &bytes, value);
             return self.writeAll(&bytes);
         }
 
         pub fn writeInt(self: Self, comptime T: type, value: T, endian: std.builtin.Endian) Error!void {
-            var bytes: [(@typeInfo(T).Int.bits + 7) / 8]u8 = undefined;
+            var bytes: [@as(u16, @intCast((@as(u17, @typeInfo(T).Int.bits) + 7) / 8))]u8 = undefined;
             mem.writeInt(std.math.ByteAlignedInt(@TypeOf(value)), &bytes, value, endian);
             return self.writeAll(&bytes);
         }

lib/std/mem.zig

@@ -1616,7 +1616,7 @@ test "readIntBig and readIntLittle" {
 /// accepts any integer bit width.
 /// This function stores in native endian, which means it is implemented as a simple
 /// memory store.
-pub fn writeIntNative(comptime T: type, buf: *[(@typeInfo(T).Int.bits + 7) / 8]u8, value: T) void {
+pub fn writeIntNative(comptime T: type, buf: *[@as(u16, @intCast((@as(u17, @typeInfo(T).Int.bits) + 7) / 8))]u8, value: T) void {
     @as(*align(1) T, @ptrCast(buf)).* = value;
 }
 

src/value.zig

@@ -616,7 +616,7 @@ pub const Value = struct {
             .Int, .Enum => {
                 const int_info = ty.intInfo(mod);
                 const bits = int_info.bits;
-                const byte_count = (bits + 7) / 8;
+                const byte_count: u16 = @intCast((@as(u17, bits) + 7) / 8);
 
                 var bigint_buffer: BigIntSpace = undefined;
                 const bigint = val.toBigInt(&bigint_buffer, mod);
@@ -859,7 +859,7 @@ pub const Value = struct {
                 };
                 const int_info = int_ty.intInfo(mod);
                 const bits = int_info.bits;
-                const byte_count = (bits + 7) / 8;
+                const byte_count: u16 = @intCast((@as(u17, bits) + 7) / 8);
                 if (bits == 0 or buffer.len == 0) return mod.getCoerced(try mod.intValue(int_ty, 0), ty);
 
                 if (bits <= 64) switch (int_info.signedness) { // Fast path for integers <= u64

test/behavior/alignof.zig

@@ -37,3 +37,12 @@ test "comparison of @alignOf(T) against zero" {
         try expect(@alignOf(T) >= 0);
     }
 }
+
+test "correct alignment for elements and slices of aligned array" {
+    var buf: [1024]u8 align(64) = undefined;
+    var start: usize = 1;
+    var end: usize = undefined;
+    try expect(@alignOf(@TypeOf(buf[start..end])) == @alignOf(*u8));
+    try expect(@alignOf(@TypeOf(&buf[start..end])) == @alignOf(*u8));
+    try expect(@alignOf(@TypeOf(&buf[start])) == @alignOf(*u8));
+}

test/behavior/if.zig

@@ -151,3 +151,15 @@ test "result location with inferred type ends up being pointer to comptime_int"
     } else @as(u32, 0);
     try expect(c == 1);
 }
+
+test "if-@as-if chain" {
+    var fast = true;
+    var very_fast = false;
+
+    const num_frames = if (fast)
+        @as(u32, if (very_fast) 16 else 4)
+    else
+        1;
+
+    try expect(num_frames == 4);
+}

test/behavior/vector.zig

@@ -1370,3 +1370,21 @@ test "vector pointer is indexable" {
     try expectEqual(@as(u32, 100), (&y)[0]);
     try expectEqual(@as(u32, 200), (&y)[1]);
 }
+
+test "boolean vector with 2 or more booleans" {
+    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
+    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
+    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
+    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
+    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
+    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest; // TODO
+
+    // TODO: try removing this after <https://github.com/ziglang/zig/issues/13782>:
+    if (!(builtin.os.tag == .linux and builtin.cpu.arch == .x86_64)) return;
+
+    const vec1 = @Vector(2, bool){ true, true };
+    _ = vec1;
+
+    const vec2 = @Vector(3, bool){ true, true, true };
+    _ = vec2;
+}

test/cases/address_of_extern_var_as_const.zig

@@ -0,0 +1,10 @@
+var internal_variable: u32 = 42;
+export const p_internal_variable = &internal_variable;
+
+extern var external_variable: u32;
+export const p_external_variable = &external_variable;
+
+// compile
+// output_mode=Obj
+// backend=stage2,llvm
+// target=x86_64-linux

test/cases/array_in_anon_struct.zig

@@ -0,0 +1,21 @@
+const std = @import("std");
+
+noinline fn outer() u32 {
+    var a: u32 = 42;
+    return inner(.{
+        .unused = a,
+        .value = [1]u32{0},
+    });
+}
+
+noinline fn inner(args: anytype) u32 {
+    return args.value[0];
+}
+
+pub fn main() !void {
+    try std.testing.expect(outer() == 0);
+}
+
+// run
+// backend=llvm
+// target=native

test/cases/compile_errors/@intCast_on_vec.zig

@@ -0,0 +1,13 @@
+export fn entry() void {
+    const a = @Vector(4, u32){ 1, 1, 1, 1 };
+    _ = @as(u32, @intCast(a));
+}
+
+// TODO: change target in the manifest to "native" probably after this is fixed:
+//       https://github.com/ziglang/zig/issues/13782
+
+// error
+// backend=stage2
+// target=x86_64-linux
+//
+// :3:27: error: expected type 'u32', found '@Vector(4, u32)'

test/cases/compile_errors/as_many_ptr_undefined.zig

@@ -0,0 +1,10 @@
+export fn entry1() void {
+    const slice = @as([*]i32, undefined)[0];
+    _ = slice;
+}
+
+// error
+// backend=stage2
+// target=native
+//
+// :2:41: error: use of undefined value here causes undefined behavior

test/cases/compile_errors/expected_optional_type_in_for.zig

@@ -0,0 +1,10 @@
+export fn entry() void {
+    var items = [_]u8{ 1, 2, 3 };
+    for (&items) |*i| {
+        i.?.* = 1;
+    }
+}
+
+// error
+//
+// :4:10: error: expected optional type, found '*u8'

test/cases/compile_errors/never_inline_call_of_inline_fn_with_comptime_param.zig

@@ -0,0 +1,23 @@
+extern var X: *volatile i32;
+
+inline fn fiveXwithType(comptime T: type) void {
+    _ = T;
+    X.* = 5;
+}
+
+inline fn fiveXwithArg(v: i32) void {
+    _ = v;
+    X.* = 5;
+}
+
+export fn entry1() void {
+    @call(.never_inline, fiveXwithType, .{i32});
+}
+export fn entry2() void {
+    @call(.never_inline, fiveXwithArg, .{1});
+}
+
+// error
+//
+// :14:5: error: 'never_inline' call of inline function
+// :17:5: error: 'never_inline' call of inline function

test/cases/returning_undefined_sentinel_terminated_const_u8_slice.zig

@@ -0,0 +1,11 @@
+fn foo() [:0]const u8 {
+    return undefined;
+}
+pub fn main() void {
+    var guid: [*:0]const u8 = undefined;
+    guid = foo();
+}
+
+// run
+// backend=llvm
+// target=native

test/cases/taking_pointer_of_global_tagged_union.zig

@@ -0,0 +1,26 @@
+const std = @import("std");
+
+const A = union(enum) { hello: usize, merp: void };
+
+var global_a: A = .{ .hello = 12 };
+var global_usize: usize = 0;
+
+fn doSomethingWithUsize(ptr: *usize) usize {
+    ptr.* = ptr.* + 1;
+    return ptr.*;
+}
+
+pub fn main() !void {
+    try std.testing.expect(doSomethingWithUsize(&global_usize) == 1);
+
+    switch (global_a) {
+        .merp => return,
+        .hello => |*value| {
+            try std.testing.expect(doSomethingWithUsize(value) == 13);
+        },
+    }
+}
+
+// run
+// backend=llvm
+// target=native