diff --git a/src/eval/eval_ir.c b/src/eval/eval_ir.c
index 3e34a22a..83876875 100644
--- a/src/eval/eval_ir.c
+++ b/src/eval/eval_ir.c
@@ -1184,6 +1184,7 @@ e_push_irtree_and_type_from_expr(Arena *arena, E_IRTreeAndType *root_parent, E_I
 #define E_ArithPath_PtrAdd          1
 #define E_ArithPath_PtrSub          2
 #define E_ArithPath_PtrArrayCompare 3
+#define E_ArithPath_TypeCompare     4
         B32 ptr_arithmetic_mul_rptr = 0;
         U32 arith_path = E_ArithPath_Normal;
         if(kind == E_ExprKind_Add)
@@ -1216,7 +1217,7 @@ e_push_irtree_and_type_from_expr(Arena *arena, E_IRTreeAndType *root_parent, E_I
             }
           }
         }
-        else if(kind == E_ExprKind_EqEq)
+        else if(kind == E_ExprKind_EqEq || kind == E_ExprKind_NtEq)
         {
           if(l_type_kind == E_TypeKind_Array && (r_type_kind == E_TypeKind_Ptr || r_is_decay))
           {
@@ -1226,6 +1227,10 @@ e_push_irtree_and_type_from_expr(Arena *arena, E_IRTreeAndType *root_parent, E_I
           {
             arith_path = E_ArithPath_PtrArrayCompare;
           }
+          if(l_tree.mode == E_Mode_Null && r_tree.mode == E_Mode_Null)
+          {
+            arith_path = E_ArithPath_TypeCompare;
+          }
         }
         
         // rjf: generate according to arithmetic path
@@ -1360,6 +1365,14 @@ e_push_irtree_and_type_from_expr(Arena *arena, E_IRTreeAndType *root_parent, E_I
             result.type_key = e_type_key_basic(E_TypeKind_Bool);
             result.mode     = E_Mode_Value;
           }break;
+          
+          //- rjf: type comparison
+          case E_ArithPath_TypeCompare:
+          {
+            result.root     = e_irtree_const_u(arena, !!e_type_match(l_type, r_type));
+            result.type_key = e_type_key_basic(E_TypeKind_Bool);
+            result.mode     = E_Mode_Value;
+          }break;
         }
       }break;
       
diff --git a/src/os/core/linux/os_core_linux.c b/src/os/core/linux/os_core_linux.c
index c61fa270..16b1e474 100644
--- a/src/os/core/linux/os_core_linux.c
+++ b/src/os/core/linux/os_core_linux.c
@@ -1175,8 +1175,8 @@ os_semaphore_drop(OS_Handle semaphore)
 internal OS_Handle
 os_barrier_alloc(U64 count)
 {
-  OS_LNX_Entity *entity = os_w32_entity_alloc(OS_LNX_EntityKind_Barrier);
-  pthread_barrier_init(&entity->barrier, count);
+  OS_LNX_Entity *entity = os_lnx_entity_alloc(OS_LNX_EntityKind_Barrier);
+  pthread_barrier_init(&entity->barrier, 0, count);
   OS_Handle result = {IntFromPtr(entity)};
   return result;
 }