Add test case for compound literals dacay

Add two regression tests to ensure correct handling of compound array literals in initializer context and when passed as pointer arguments.

The tests cover:
- decay of an int[] compound literal to int* during initialization
- passing an int[] compound literal to a function expecting int*

Author: lorettayao

tests/driver.sh

@@ -733,6 +733,28 @@ int main() {
 }
 EOF
 
+# Test: Array compound literal decay to pointer in initializer
+try_ 0 << EOF
+int main(void) {
+    int *arr = (int[]){1, 2, 3, 4, 5};
+    return arr[0] != 1 || arr[4] != 5;
+}
+EOF
+
+# Test: Passing array compound literal as pointer argument
+try_ 0 << EOF
+int sum(int *p, int n) {
+    int s = 0;
+    for (int i = 0; i < n; i++)
+        s += p[i];
+    return s;
+}
+int main(void) {
+    int s = sum((int[]){1, 2, 3, 0, 0}, 3);
+    return s != 6;
+}
+EOF
+
 # Test: Complex expression with compound literals
 try_ 77 << EOF
 int main() {