This link https://gcc.gnu.org/onlinedocs/gcc/Integer-Overflow-Builtins.html says "As the addition is performed in infinite signed precision, these built-in functions have fully defined behavior for all argument values. " I'm curious if these types of builtins are well defined for things like the following: int a, b; a = 5; b = 10; __builtin_add_overflow(a,b,&a); Notice the re-use of the variable a. I'm wondering if there is a sequencing issue and we need to use a third variable for the storage or if this is fine as well. Thanks, Scotty
