On Tue, Jul 15, 2014 at 4:10 AM, Janusz Sobczak <janusz.sobc...@mobica.com> wrote:
> >>! In D4492#5, @rsmith wrote: > > This makes Clang's constant expression evaluator and its IR generation > disagree about the value of `__builtin_constant_p`. > How would you address this issue? My concern is that there are cases, > where we need to fold to a constant early (i.e. global variable > initialisation) and other cases where we can emit IR code and make the > decision about 'constantness' at a later stage. > > > > > What's the motivation behind this change? > Matching GCC behaviour as closely as we can. That seems like a means to an end, rather than a goal in itself. Also, we currently match GCC's -O0 behavior pretty closely.
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