Intel C++ Compiler produces wrong code

Hello,

I've got strange behavior of Intel C++ Compiler on linux. The problem is reproduce in online compiler godbolt on a small part. Inv value should be inverse of work, but with Intel it is not the case.

Problem solves if I add "-fp-model except".

I seems that lines 64-67 confuse compiler. There are no such lines there in  work code, but the problem is the same. 

https://godbolt.org/z/p04TXC

Thanks

Aleksey