[Bug rtl-optimization/127022] [13/14/15/16/17 Regression] ICE on valid code at -O{2,3} with "-fno-dce -fsched2-use-superblocks" on x86_64-linux-gnu: in begin_move_insn, at sched-ebb.cc:196

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127022

Drea Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |13.5
            Summary|ICE on valid code at        |[13/14/15/16/17 Regression]
                   |-O{2,3} with "-fno-dce      |ICE on valid code at
                   |-fsched2-use-superblocks"   |-O{2,3} with "-fno-dce
                   |on x86_64-linux-gnu: in     |-fsched2-use-superblocks"
                   |begin_move_insn, at         |on x86_64-linux-gnu: in
                   |sched-ebb.cc:196            |begin_move_insn, at
                   |                            |sched-ebb.cc:196

--- Comment #2 from Drea Pinski <pinskia at gcc dot gnu.org> ---
      /* split_edge () creates BB before E->DEST.  Keep in mind, that
         this operation extends scheduling region till the end of BB.
         Hence, we need to shift NEXT_TAIL, so haifa-sched.cc won't go out
         of the scheduling region.  */
      current_sched_info->next_tail = NEXT_INSN (BB_END (bb));
      gcc_assert (current_sched_info->next_tail);