rengolin added reviewers: rsmith, t.p.northover.
rengolin added a comment.
Adding Richard Smith, as he was the one choosing C99/!freestanding for runtime
rounding.
================
Comment at: lib/Basic/Targets.cpp:4790
@@ -4779,1 +4789,3 @@
+ if (!Opts.C11)
+ Builder.defineMacro("__SUPPORT_SNAN__", "1");
}
----------------
labrinea wrote:
> rengolin wrote:
> > Er, well, the ACLE doc says it wasn't adopted in C11, but that doesn't mean
> > that it was present in all others, just that there is a proposal for C11
> > which wasn't accepted.
> >
> > I think this macro needs some other mechanism to be set, and unless
> > Clang/LLVM supports signaling NANs unconditionally, we shouldn't add it.
> Maybe we could skip this macro in this patch? @richard.barton.arm
If this item sparks controversy, we should keep it out. For now, I'm interested
in what Tim and Richard(s) have to say.
http://reviews.llvm.org/D12633
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