[Bug tree-optimization/81982] [arm] libstdc++ miscompiled, constant propagation is broken on native arm

[nsz at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81982

--- Comment #2 from nsz at gcc dot gnu.org ---
Created attachment 42045
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42045&action=edit
bad ccp1 output from -fdump-tree-all