[Bug rtl-optimization/22619] [3.4/4.0/4.1 regression] Compilation failure for real_const_1.f and real_const_2.f90

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-07-28 
18:43 -------
And here is a testcase which fails from 3.3 and upwards at -O2 (on the mainline 
you have to supply 
-fno-tree-ccp -fno-tree-store-ccp as we optimize it at the tree level):
void f (void)
{
  static const float rp[4] = {1.0e+0, 1.0e+0, 1.0e+0, 1.0e+0};
  static const float rn[4] = {-1.0e+0, -1.0e+0, -1.0e+0, -1.0e+0};

  if (__builtin_fabsf(rp[0] - 1.0e+0f) > 
9.99999974737875163555145263671875e-6f) goto L16; else 
goto L24;

L3:;
  if (__builtin_fabsf(rn[0] + 1.0e+0f) > 
9.99999974737875163555145263671875e-6f) goto L18; else 
goto L33;

L10:;
  return;

L16:;
  __builtin_abort ();

L18:;
  __builtin_abort ();

L24:;
  if (__builtin_fabsf (rp[1] - 1.0e+0f) > 
9.99999974737875163555145263671875e-6) goto L16; else 
goto L27;

L27:;
  if (__builtin_fabsf (rp[2] - 1.0e+0f) > 
9.99999974737875163555145263671875e-6f) goto L16; else 
goto L30;

L30:;
  if (__builtin_fabsf (rp[3] - 1.0e+0f) > 
9.99999974737875163555145263671875e-6f) goto L16; else 
goto L3;

L33:;
  if (__builtin_fabsf(rn[1] + 1.0e+0f) > 
9.99999974737875163555145263671875e-6f) goto L18; else 
goto L36;

L36:;
  if (__builtin_fabsf(rn[2] + 1.0e+0f) > 
9.99999974737875163555145263671875e-6f) goto L18; else 
goto L39;

L39:;
  if (__builtin_fabsf(rn[3] + 1.0e+0f) > 
9.99999974737875163555145263671875e-6f) goto L18; else 
goto L10;

}

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|                            |3.3.3 3.4.0 4.0.0 4.1.0
      Known to work|                            |3.2.3
            Summary|[4.1 regression] Compilation|[3.4/4.0/4.1 regression]
                   |failure for real_const_1.f  |Compilation failure for
                   |and real_const_2.f90        |real_const_1.f and
                   |                            |real_const_2.f90
   Target Milestone|4.1.0                       |4.0.2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22619