[llvm-commits] PATCH: Add 64-bit architecture predicate to llvm::Triple

[Chandler Carruth]

This predicate doesn't make much sense inside of LLVM currently because all
of the backends track 64-bitness separately for some (likely historical)
reason. However, Clang could benefit greatly from this predicate, it would
remove one of the most commonly repeated queries about a triple. It also
seems likely that targets could move toward relying more heavily on the
triple to deduce these things, or at least start asserting that the
explicit 64-bitness of the subtarget objects matches the triple.
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