[Bug target/56560] [4.6/4.7 regression] vzeroupper clobbers argument with AVX

[ebotcazou at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56560

--- Comment #5 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2013-03-10 15:51:03 UTC ---
> diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
> index c1f6c88..8005207 100644
> --- a/gcc/config/i386/i386.c
> +++ b/gcc/config/i386/i386.c
> @@ -5562,7 +5562,7 @@ init_cumulative_args (CUMULATIVE_ARGS *cum,  /* Argument
> info to initialize */
>    memset (cum, 0, sizeof (*cum));
> 
>    /* Initialize for the current callee.  */
> -  if (caller)
> +  if (caller && fndecl)
>      {
>        cfun->machine->callee_pass_avx256_p = false;
>        cfun->machine->callee_return_avx256_p = false;
> 
> fixes it.

I don't think it's correct, fndecl is NULL_TREE for indirect calls as well.