diff --git a/src/Sema.zig b/src/Sema.zig
index 45da0927cd..79fe7b2eb0 100644
--- a/src/Sema.zig
+++ b/src/Sema.zig
@@ -32776,7 +32776,52 @@ pub fn typeHasOnePossibleValue(sema: *Sema, ty: Type) CompileError!?Value {
         .vector_type => @panic("TODO"),
         .optional_type => @panic("TODO"),
         .error_union_type => @panic("TODO"),
-        .simple_type => @panic("TODO"),
+        .simple_type => |t| switch (t) {
+            .f16,
+            .f32,
+            .f64,
+            .f80,
+            .f128,
+            .usize,
+            .isize,
+            .c_char,
+            .c_short,
+            .c_ushort,
+            .c_int,
+            .c_uint,
+            .c_long,
+            .c_ulong,
+            .c_longlong,
+            .c_ulonglong,
+            .c_longdouble,
+            .anyopaque,
+            .bool,
+            .type,
+            .anyerror,
+            .comptime_int,
+            .comptime_float,
+            .@"anyframe",
+            .enum_literal,
+            .atomic_order,
+            .atomic_rmw_op,
+            .calling_convention,
+            .address_space,
+            .float_mode,
+            .reduce_op,
+            .call_modifier,
+            .prefetch_options,
+            .export_options,
+            .extern_options,
+            .type_info,
+            => return null,
+
+            .void => return Value.void,
+            .noreturn => return Value.initTag(.unreachable_value),
+            .null => return Value.null,
+            .undefined => return Value.undef,
+
+            .generic_poison => return error.GenericPoison,
+        },
         .struct_type => @panic("TODO"),
         .simple_value => unreachable,
         .extern_func => unreachable,
diff --git a/src/type.zig b/src/type.zig
index 9f14619c2c..a4f1f5174b 100644
--- a/src/type.zig
+++ b/src/type.zig
@@ -5030,7 +5030,52 @@ pub const Type = struct {
             .vector_type => @panic("TODO"),
             .optional_type => @panic("TODO"),
             .error_union_type => @panic("TODO"),
-            .simple_type => @panic("TODO"),
+            .simple_type => |t| switch (t) {
+                .f16,
+                .f32,
+                .f64,
+                .f80,
+                .f128,
+                .usize,
+                .isize,
+                .c_char,
+                .c_short,
+                .c_ushort,
+                .c_int,
+                .c_uint,
+                .c_long,
+                .c_ulong,
+                .c_longlong,
+                .c_ulonglong,
+                .c_longdouble,
+                .anyopaque,
+                .bool,
+                .type,
+                .anyerror,
+                .comptime_int,
+                .comptime_float,
+                .@"anyframe",
+                .enum_literal,
+                .atomic_order,
+                .atomic_rmw_op,
+                .calling_convention,
+                .address_space,
+                .float_mode,
+                .reduce_op,
+                .call_modifier,
+                .prefetch_options,
+                .export_options,
+                .extern_options,
+                .type_info,
+                => return null,
+
+                .void => return Value.void,
+                .noreturn => return Value.initTag(.unreachable_value),
+                .null => return Value.null,
+                .undefined => return Value.undef,
+
+                .generic_poison => unreachable,
+            },
             .struct_type => @panic("TODO"),
             .simple_value => unreachable,
             .extern_func => unreachable,