> On 3 Mar 2021, at 21:22, Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote: > >>> >>> Local variables absolutely should be treated just like CPU registers, if >>> possible. In fact, the compiler has the option of keeping local >>> variables stored in registers. >>> >>> (Of course, things may get complicated if anyone writes a litmus test >>> that uses a pointer to a local variable, Especially if the pointer >>> could hold the address of a local variable in one execution and a >>> shared variable in another! Or if the pointer is itself a shared >>> variable and is dereferenced in another thread!) >> >> Good point! I did miss this complication. ;-) > > I suspect it wouldn't be so bad if herd7 disallowed taking addresses of > local variables. > > Herd7 does disallow taking addresses of local variables. However, such tests can still be run on machine, provided function bodies are accepted by the C compiler. —Luc
