Fix #12418: Misra 11.6 checks cast from expression result (#5953)

Author: amacgregor-sym

addons/misra.py

@@ -2581,8 +2581,6 @@ def misra_11_6(self, data):
         for token in data.tokenlist:
             if not isCast(token):
                 continue
-            if token.astOperand1.astOperand1:
-                continue
             vt1 = token.valueType
             vt2 = token.astOperand1.valueType
             if not vt1 or not vt2:

addons/test/misra/misra-test.c

@@ -836,10 +836,17 @@ static void misra_11_5(void *p) {
   p16 = p;     // 11.5
 }
 
+static intptr_t get_intptr_constant(void) { return 456; }
 static void misra_11_6(void) {
   void *p;
+  struct {
+    int i;
+  } s = { .i = 7 };
   p = (void*)123;  // 11.6
   x = (u64)p;      // 11.6
+  p = (void*)(1+1);// 11.6
+  p = (void*)get_intptr_constant(); // 11.6
+  p = (void*)s.i;  // 11.6
   p = ( void * )0; // no-warning
   (void)p;         // no-warning
   // # 12184