Code optimization: warning for code that hangs

[Ángel González]

"Peter A. Felvegi" writes:
>>> My question is: wouldn't it be possible to print a warning when a jmp
>>> to itself or trivial infinite recursion is generated? The code
>>> compiled fine w/ -Wall -Wextra -Werror w/ 4.6 and 4.7.
Note that if the target architecture is a microcontroller, an endless
loop can be a legitimate way to finish / abort the program.