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.
