Fix optional integer promotion

1 files changed, 7 insertions, 6 deletions

diff --git a/compile.c b/compile.c
index f5ed809d..8da5eba4 100644
--- a/compile.c
+++ b/compile.c
@@ -44,6 +44,7 @@ CORD promote_to_optional(type_t *t, CORD code)
         return code;
     }
 }
+
 static bool promote(env_t *env, CORD *code, type_t *actual, type_t *needed)
 {
     if (type_eq(actual, needed))
@@ -52,6 +53,12 @@ static bool promote(env_t *env, CORD *code, type_t *actual, type_t *needed)
     if (!can_promote(actual, needed))
         return false;
 
+    // Optional promotion:
+    if (needed->tag == OptionalType && type_eq(actual, Match(needed, OptionalType)->type)) {
+        *code = promote_to_optional(actual, *code);
+        return true;
+    }
+
     if (actual->tag == IntType && needed->tag == BigIntType) {
         *code = CORD_all("I(", *code, ")");
         return true;
@@ -81,12 +88,6 @@ static bool promote(env_t *env, CORD *code, type_t *actual, type_t *needed)
         return promote(env, code, Match(actual, PointerType)->pointed, needed);
     }
 
-    // Optional promotion:
-    if (needed->tag == OptionalType && type_eq(actual, Match(needed, OptionalType)->type)) {
-        *code = promote_to_optional(actual, *code);
-        return true;
-    }
-
     // Stack ref promotion:
     if (actual->tag == PointerType && needed->tag == PointerType)
         return true;