[Bug gcov-profile/97910] [GCOV]"&&" lead to incorrect code coverage when multiple expressions of a single statement fall in different lines

[marxin at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97910

Martin Liška <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2020-11-20

--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, it's related to how we generate code for the condition:

  <bb 2> :
  [pr97910.c:10:13] _1 = [pr97910.c:10:13] x.a;
  [pr97910.c:10:16] _2 = _1 & 16368;
  [pr97910.c:10:31] _3 = [pr97910.c:10:31] y.a;
  [pr97910.c:10:34] _4 = _3 & 1023;
  [pr97910.c:10:44] if (_2 == _4)
    goto <bb 3>; [INV]
  else
    goto <bb 5>; [INV]

  <bb 3> :
  [pr97910.c:11:6] _5 = [pr97910.c:11:6] x.b;
  [pr97910.c:11:9] _6 = _5 & 16368;
  [pr97910.c:11:24] _7 = [pr97910.c:11:24] y.b;
  [pr97910.c:11:27] _8 = _7 & 1023;
  [pr97910.c:10:44] if (_6 == _8)
    goto <bb 4>; [INV]
  else
    goto <bb 5>; [INV]

  <bb 4> :
  [pr97910.c:10:44] iftmp.0_11 = 1;
  [pr97910.c:10:44] goto <bb 6>; [INV]

  <bb 5> :
  [pr97910.c:10:44] iftmp.0_12 = 0;