Justin Bogner 9b34e8a770 SDAG: Implement Select instead of SelectImpl in SystemZDAGToDAGISel ...

- Where we were returning a node before, call ReplaceNode instead.
- Where we would return null to fall back to another selector, rename
  the method to try* and return a bool for success.

Part of llvm.org/pr26808.

llvm-svn: 269505

2016-05-13 22:42:08 +00:00

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