https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96365
--- Comment #2 from wierton <141242068 at smail dot nju.edu.cn> --- (In reply to Jakub Jelinek from comment #1) > Any reason why you can't just write "=a"(x), "=b"(y), "=c"(z) if you mean > that as the only possibility? Emm, I was studying the inline assembly by reading the manual on https://gcc.gnu.org/onlinedocs/gcc/Using-Assembly-Language-with-C.html#Using-Assembly-Language-with-C. This example was accidently found because I wondered that if GCC really considers constraints allocation as constraint solving problem. It seems that GCC takes simpler strategy such as greedy algorithm and this may violate the specification. I was not very sure if it is really inconsistent with specification (I failed in finding accurate description), but I thought posting this example may help improve the quality of GCC (or specification).
