[cfe-commits] Patch for evaluating FP constant expressions

[Christopher Lamb]

I needed this to support negation of FP literals, which is pretty  
unambiguous. It looks like GCC evaluates more complex constant  
expressions too, so I put in support for some of that (though  
rounding mode is an issue). All of this is modeled on the work for  
integer expressions and uses APFloat.

--
Christopher Lamb





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