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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/104121] [12 Regression] v850: Infinite loop in
 find_reload_regno_insns()
Date: Wed, 19 Jan 2022 16:33:05 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D104121

Martin Li=C5=A1ka <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2022-01-19
             Status|UNCONFIRMED                 |NEW

--- Comment #3 from Martin Li=C5=A1ka <marxin at gcc dot gnu.org> ---
Thanks, reduced test-case:

$ cat /tmp/loop.i
int __muldc3_a;
int __muldc3_b;
int __muldc3_c;
double __muldc3_d;

_Complex double
xxx() {
  double y;
  if (__builtin_isnan && __builtin_isnan(y)) {
    y =3D 0 * (__muldc3_a * __muldc3_d + __muldc3_b * __muldc3_c);
  }
}

Loops only with -mv850e2v3 option, I'm bisecting that right now.=