[Bug target/30370] [4.1 regression] Build failure in libgcc2 powitf2 with ICE in gen_reg_rtx

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=30370
Bug 30370 depends on bug 30259, which changed state.

Bug 30259 Summary: ICE on valid code
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=30259

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |WONTFIX