[Bug ipa/117892] [15 Regression] ICE on valid code at -O1 and above on x86_64-linux-gnu: in single_succ_edge, at basic-block.h:332 since r15-5336-gcee7d080d5c2a5

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117892

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I actually think this might be a DSE issue.

  Deleted dead store: # .MEM_5 = VDEF <.MEM_3(D)>
# USE = nonlocal 
# CLB = { D.2867 }
_Z1bPiD.2862 (&fD.2867);


And that creates an empty basic block with no successors:
;;   basic block 3, loop depth 0, maybe hot
;;    prev block 2, next block 4, flags: (NEW, VISITED)
;;    pred:       2 (TRUE_VALUE,EXECUTABLE)
;;    succ:      

That started in GCC 12.