[Bug rtl-optimization/91347] [7/8/9/10 Regression] pointer_string in linux vsprintf.c is miscompiled when sibling calls are optimized

[danglin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91347

--- Comment #3 from John David Anglin <danglin at gcc dot gnu.org> ---
I see in dse.c:

/* Get arguments passed to CALL_INSN.  Return TRUE if successful.
   So far it only handles arguments passed in registers.  */

static bool
get_call_args (rtx call_insn, tree fn, rtx *args, int nargs)