[Bug tree-optimization/128277] [14/15/16/17 Regression] Compile-time hog in ccp1 at -O1 on a loop header with many latch edges since r13-5102

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=128277

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mimicing the simple fix from FRE to CCP gets me from

 tree CCP                           : 149.30 ( 90%)   102k (  0%)

to

 tree CCP                           :   7.16 ( 29%)   102k (  0%)