RFR: 8145096: Undefined behaviour in HotSpot

[Andrew Haley]

On 11/12/15 19:33, Kim Barrett wrote:
> pps. The union trick is undefined behavior because it reads a union
> member other than the last one written. 

Hmm.  The members are certainly in the same memory locations, and I
suspect that the language in 3.10 (Lvalues and rvalues) about signed
and unsigned types allows it too.  But never mind: we only need one
way to do this, and if we can agree that it works we're done.

Andrew.