[llvm-commits] Fold multiply by 0 and 1 when in UnsafeFPMath mode in SelectionDAG::getNode()

[Michael Ilseman]

Attached is a patch to fold multiply by 0 or 1 when in UnsafeFPMath mode in SelectionDAG::getNode(). This is in getNode() for performance reasons, and to make sure it isn't foiled by other transforms (e.g. forming FMAs).

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