61 
  62 extern int __expr_stmt_count;
  63 
  64 struct expression_list *big_condition_stack;
  65 
  66 static void split_conditions(struct expression *expr);
  67 
  68 static int is_logical_and(struct expression *expr)
  69 {
  70         if (expr->op == SPECIAL_LOGICAL_AND)
  71                 return 1;
  72         return 0;
  73 }
  74 
  75 static int handle_zero_comparisons(struct expression *expr)
  76 {
  77         struct expression *tmp = NULL;
  78         struct expression *zero;
  79 
  80         // if left is zero or right is zero
  81         if (is_zero(expr->left)) {
  82                 zero = strip_expr(expr->left);
  83                 if (zero->type != EXPR_VALUE)
  84                         __split_expr(expr->left);
  85                 tmp = expr->right;
  86         } else if (is_zero(expr->right)) {
  87                 zero = strip_expr(expr->left);
  88                 if (zero->type != EXPR_VALUE)
  89                         __split_expr(expr->right);
  90                 tmp = expr->left;
  91         } else {
  92                 return 0;
  93         }
  94 
  95         // "if (foo != 0)" is the same as "if (foo)"
  96         if (expr->op == SPECIAL_NOTEQUAL) {
  97                 split_conditions(tmp);
  98                 return 1;
  99         }
 100 
 101         // "if (foo == 0)" is the same as "if (!foo)"
 102         if (expr->op == SPECIAL_EQUAL) {
 103                 split_conditions(tmp);
 104                 __negate_cond_stacks();
 105                 return 1;
 106         }

  61 
  62 extern int __expr_stmt_count;
  63 
  64 struct expression_list *big_condition_stack;
  65 
  66 static void split_conditions(struct expression *expr);
  67 
  68 static int is_logical_and(struct expression *expr)
  69 {
  70         if (expr->op == SPECIAL_LOGICAL_AND)
  71                 return 1;
  72         return 0;
  73 }
  74 
  75 static int handle_zero_comparisons(struct expression *expr)
  76 {
  77         struct expression *tmp = NULL;
  78         struct expression *zero;
  79 
  80         // if left is zero or right is zero
  81         if (expr_is_zero(expr->left)) {
  82                 zero = strip_expr(expr->left);
  83                 if (zero->type != EXPR_VALUE)
  84                         __split_expr(expr->left);
  85                 tmp = expr->right;
  86         } else if (expr_is_zero(expr->right)) {
  87                 zero = strip_expr(expr->left);
  88                 if (zero->type != EXPR_VALUE)
  89                         __split_expr(expr->right);
  90                 tmp = expr->left;
  91         } else {
  92                 return 0;
  93         }
  94 
  95         // "if (foo != 0)" is the same as "if (foo)"
  96         if (expr->op == SPECIAL_NOTEQUAL) {
  97                 split_conditions(tmp);
  98                 return 1;
  99         }
 100 
 101         // "if (foo == 0)" is the same as "if (!foo)"
 102         if (expr->op == SPECIAL_EQUAL) {
 103                 split_conditions(tmp);
 104                 __negate_cond_stacks();
 105                 return 1;
 106         }