[Bug c/59939] No warning on signedness changes caused by implicit conversion

[chengniansun at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59939

--- Comment #3 from Chengnian Sun <chengniansun at gmail dot com> ---
(In reply to Andrew Pinski from comment #1)
> IIRC this was done so that code which uses macros and have conditional code
> like:
> 
> MACRO1 || fn1(a, b)

Sorry, I do not understand. Can you elaborate more? Why it is related to macros
and what is the rational behind this design.