add workaround for ziglang#13782

Author: candrewlee14

lib/std/hash_map.zig

@@ -828,7 +828,10 @@ pub fn HashMapUnmanaged(
 
                 const cap = it.hm.capacity();
                 var metadata = it.hm.metadata.? + it.index;
-                if (builtin.zig_backend != .stage2_c) {
+                if (comptime builtin.zig_backend != .stage2_c and // TODO
+                    // https://github.com/ziglang/zig/issues/13782
+                    (builtin.zig_backend != .stage2_llvm or builtin.cpu.arch.endian() != .Big))
+                {
                     comptime var vec_size: u8 = 16;
                     inline while (vec_size >= 1) : (vec_size /= 2) {
                         while ((cap - it.index) >= vec_size) {
@@ -881,7 +884,10 @@ pub fn HashMapUnmanaged(
                 items: [*]T,
 
                 pub fn next(self: *@This()) ?*T {
-                    if (builtin.zig_backend != .stage2_c) {
+                    if (comptime builtin.zig_backend != .stage2_c and // TODO
+                        // https://github.com/ziglang/zig/issues/13782
+                        (builtin.zig_backend != .stage2_llvm or builtin.cpu.arch.endian() != .Big))
+                    {
                         comptime var vec_size: usize = 16;
                         inline while (vec_size >= 1) : (vec_size /= 2) {
                             while (self.len >= vec_size) {