TEST: Add for const step in loop

Author: ubaidsk

integration_tests/CMakeLists.txt

@@ -509,6 +509,7 @@ RUN(NAME loop_04             LABELS cpython llvm c)
 RUN(NAME loop_05             LABELS cpython llvm c)
 RUN(NAME loop_06             LABELS cpython llvm c NOFAST)
 RUN(NAME loop_07             LABELS cpython llvm c)
+RUN(NAME loop_08             LABELS cpython llvm c)
 RUN(NAME if_01               LABELS cpython llvm c wasm wasm_x86 wasm_x64)
 RUN(NAME if_02               LABELS cpython llvm c wasm wasm_x86 wasm_x64)
 RUN(NAME if_03    FAIL       LABELS cpython llvm c NOFAST)

integration_tests/loop_08.py

@@ -0,0 +1,13 @@
+from lpython import i32, Const
+
+def main0():
+    i: i32
+    n: Const[i32] = 10
+    M2: Const[i32] = 2
+    y: i32 = 0
+    for i in range(0, n, M2):  # each M2 block in A cols and B rows  # !!!!!!!!!!!!!!
+        y = y + 2
+    print(y)
+    assert(y == 10)
+
+main0()