-#define __min(t1, t2, min1, min2, x, y) ({ \
- t1 min1 = (x); \
- t2 min2 = (y); \
- (void) (&min1 == &min2); \
- min1 < min2 ? min1 : min2; })
+#define __is_constexpr(x) \
+ (sizeof(int) == sizeof(*(8 ? ((void *)((long)(x) * 0l)) : (int *)8)))
+
+#define __no_side_effects(x, y) \
+ (__is_constexpr(x) && __is_constexpr(y))
+
+#define __safe_cmp(x, y) \
+ (__typecheck(x, y) && __no_side_effects(x, y))
+
+#define __cmp(x, y, op) ((x) op (y) ? (x) : (y))
+
+#define __cmp_once(x, y, op) ({ \
+ typeof(x) __x = (x); \
+ typeof(y) __y = (y); \
+ __cmp(__x, __y, op); })
+
+#define __careful_cmp(x, y, op) \
+ __builtin_choose_expr(__safe_cmp(x, y), \
+ __cmp(x, y, op), __cmp_once(x, y, op))