hubert.reinterpretcast added a comment.

In http://reviews.llvm.org/D15120#337144, @nemanjai wrote:

> Do you suggest that we need to allow operations (or at least assignments) 
> between the two types and take away the diagnostics that are part of this 
> patch?


My overriding concern at this time is to allow (or not) the operations 
consistently (that is, not making it platform-specific). The net result is that 
we will allow operations between the two types; however, we will encounter a 
further issue to discuss (@rjmccall @rsmith; your input requested) regarding 
what the common type should be when the representations are the same (the TS 
prefers the standard floating type, which is `long double` here).

As for the diagnostics, the IEEEquad to PPCDoubleDouble conversion still 
requires checks for narrowing.


Repository:
  rL LLVM

http://reviews.llvm.org/D15120



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