[Bug target/113711] APX instruction set and instructions longer than 15 bytes (assembly warning)

[hongyuw at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113711

--- Comment #6 from Hongyu Wang <hongyuw at gcc dot gnu.org> ---
(In reply to H.J. Lu from comment #5)
> (In reply to Hongyu Wang from comment #4)
> > Previously I added 
> > https://gcc.gnu.org/git/?p=gcc.git;a=commit;
> > h=d564198f960a2f5994dde3f6b83d7a62021e49c3
> > 
> > to prohibit several *POFF constant usage in NDD add alternative. If checking
> > ADDR_SPACE_GENERIC can avoid the seg prefix usage, we can drop that change?
> 
> Are there are any testcases for this change?
> 

Cut and edit from gcc.dg\torture\tls\tls-test.c

#include <pthread.h>
__thread int a = 255; 
__thread int *b;
int *volatile a_in_other_thread = (int *) 12345;

void *
thread_func (void *arg)
{
  a_in_other_thread = &a; //Previously it will try to generate addq $a@tpoff,
%fs:0, %rax 
  a+=11144; //this was not fixed on trunk as UNSPEC_TPOFF is in mem operand
  *((int *) arg) = a;

  return (void *)0;
}