[Bug tree-optimization/68157] [5/6 Regression] internal compiler error: in reassoc_stmt_dominates_stmt_p, at tree-ssa-reassoc.c:1287

["trippels at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68157

Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2015-10-30
                 CC|                            |trippels at gcc dot gnu.org
            Summary|internal compiler error: in |[5/6 Regression] internal
                   |reassoc_stmt_dominates_stmt |compiler error: in
                   |_p, at                      |reassoc_stmt_dominates_stmt
                   |tree-ssa-reassoc.c:1287     |_p, at
                   |                            |tree-ssa-reassoc.c:1287
     Ever confirmed|0                           |1

--- Comment #2 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
trippels@CFARM-IUT-TLSE3 ~ % cat zfslbmpartcont.ii
typedef double ZFSFloat;
double a, b, c, d;
class A {
public:
  long m_fn1();
};
class B {
  A m_collList;
  int m_particleCollisions;
  void m_fn2();
};
void B::m_fn2() {
  while (m_collList.m_fn1()) {
    ZFSFloat e, f;
    e = b * a * a;
    f = b * d;
    if (m_particleCollisions)
      c = e + f;
  }
}

trippels@CFARM-IUT-TLSE3 ~ % g++ -Ofast -c zfslbmpartcont.ii
zfslbmpartcont.ii: In member function âvoid B::m_fn2()â:
zfslbmpartcont.ii:12:6: internal compiler error: in
reassoc_stmt_dominates_stmt_p, at tree-ssa-reassoc.c:1218