https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105342
--- Comment #4 from 。 <570070308 at qq dot com> --- (In reply to Richard Biener from comment #1) > Is it really important though? The doc says that "The asm statement allows you to include assembly instructions directly within C code. This may help you to maximize performance in time-sensitive code or to access assembly instructions that are not readily available to C programs.", and I use extended-asm rather than writing a whole function with assembly just for maximize performance. I try my best for not using "memory" clobber, but in some cases I have to use it, for example, using the asm to operate a list structure like the `struct list_head` in Linux. It is impossible to list all the list elements in the Input/OutputOperands.
