[Bug tree-optimization/106186] [13 regression] Recent change causing target regressions for uninitialized objects

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106186

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |rguenth at gcc dot gnu.org

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
There's some extra CFG bits because of virtual operands on trunk:

  <bb 6> [local count: 39370534]:
  # .MEM_13 = PHI <.MEM_6(5)>
  goto <bb 10>; [100.00%]

  <bb 9> [local count: 357913944]:
  # .MEM_12 = PHI <.MEM_6(4)>
<L15>:

  <bb 10> [local count: 397284478]:
  # .MEM_14 = PHI <.MEM_12(9), .MEM_13(6)>
<L13>:

the loop-end propagation of LC SSA PHIs doesn't work for those - I'm going to
fix that which also seems to fix the missed jump threading.