-Wdouble-promotion & noise

[Ian Lance Taylor]

tbp <tbptbp@gmail.com> writes:

> On Tue, Sep 14, 2010 at 7:14 PM, Ian Lance Taylor <iant@google.com> wrote:
>> What is it that you want?
> I'd like to have a warning for when a value of type float is
> implicitly promoted to double, for performance reasons (on x86).

Let me put it a different way: what is it that you want, expressed in
terms of C/C++ code?  What should the compiler be warning about?

>   -Wunsuffixed-float-constants, unavailable in C++.

It seems that this could be added to C++ easily enough.

Ian