[Bug tree-optimization/97138] cross-BB vectorization opportunity

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97138

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |FIXED

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed for GCC11:

  <bb 2> [local count: 10737416]:
  _8 = {x_14(D), x_14(D)};
  vect_a0_12.8_24 = MEM <vector(2) double> [(double *)&a];

  <bb 3> [local count: 1063004409]:
  # vect_a0_26.9_23 = PHI <vect_a0_19.5_25(3), vect_a0_12.8_24(2)>
  # ivtmp.23_16 = PHI <ivtmp.23_15(3), 0(2)>
  vect__2.10_22 = _8 + vect_a0_26.9_23;
  MEM <vector(2) double> [(double *)&b + ivtmp.23_16 * 1] = vect__2.10_22;
  bar ();
  vect_a0_19.5_25 = MEM <vector(2) double> [(double *)&a + 16B + ivtmp.23_16 *
1];
  ivtmp.23_15 = ivtmp.23_16 + 16;
  if (ivtmp.23_15 != 8176)
    goto <bb 3>; [98.99%]
  else
    goto <bb 4>; [1.01%]

  <bb 4> [local count: 10737416]:
  return;