fix another negative bug

ecmwf-ifs · Oct 20, 2023 · b3b78ca · b3b78ca
1 parent 9c2f441
commit b3b78ca
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/loki/transform/transform_scalar_syntax.py b/loki/transform/transform_scalar_syntax.py
@@ -48,6 +48,7 @@ def single_sum(expr):
     ----------
     expr: any pymbolic expression
     """
+
     if isinstance(expr, pmbl.Sum):
         return expr
     return Sum((expr,))
@@ -78,14 +79,15 @@ def product_value(expr):
                 m = m*c
             else:
                 new_children += [c]
-
         if m == 0:
             return 0
         if not new_children:
             return m
 
         if m > 1:
             new_children = [IntLiteral(m)] + new_children
+        elif m == -1:
+            new_children = [-1] + new_children
         elif m < -1:
             new_children = [-1, IntLiteral(abs(m))] + new_children