[Bug target/34777] uClibc-0.9.29 compilation error for sh4 arch with gcc-4.x

[olegendo at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=34777

Oleg Endo <olegendo at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Depends on|                            |55212

--- Comment #12 from Oleg Endo <olegendo at gcc dot gnu.org> ---
(In reply to Oleg Endo from comment #11)
> 
> seems to fix the test case of PR 34807.  However, I've not tested it any
> further and probably the fix is incomplete and works only for mem loads and
> not stores.
> In fact it can be broken again quite easily by inserting another insn that
> requires R0 (tst #imm,r0 in this case):
> 
> int glob, glob1;
> 
> static int _dl_mmap (int xx)
>  {
>    register int __sc0 __asm__ ("r0") = glob1;
>    register int __sc1 __asm__ ("r1") = glob;
> 
>    if (xx & 3)
>      __asm__  ("trapa %1 " : "=z" (__sc0) : "i" (0x10), "0" (__sc0), "r"
> (__sc1));
> 
>    return (__sc0);
>  }
>  
>  void _start(int xx)
>  {
>    static int buf;
>    buf = _dl_mmap(xx);
>  }

I've tried that test case with the sh-lra branch and the problems seem to be
gone.