[llvm-commits] patch: "minor" LazyValueInfo cleanup

[Nick Lewycky]

This patch is basically a cleanup of some of LVI, as I start hacking on it.
 * mergeIn now uses constant folding for constants that are provably
not-equal.
 * sink some sanity checks from the get*() methods into the mark*() methods,
to ensure that we never have a constant/notconstant ConstantInt
 * some textual cleanups, whitespace changes, removing "else" after return.

Please review!

Nick
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