R600: Move computeMaskedBitsForTargetNode out of AMDILISelLowering.cpp

Remove handling of select_cc, since it makes no sense to be there. This
now does nothing, but I'll be adding some handling of other target nodes
soon.

llvm-svn: 204743
diff --git a/llvm/lib/Target/R600/AMDGPUISelLowering.cpp b/llvm/lib/Target/R600/AMDGPUISelLowering.cpp
index 743bf6f..f6e48c9 100644
--- a/llvm/lib/Target/R600/AMDGPUISelLowering.cpp
+++ b/llvm/lib/Target/R600/AMDGPUISelLowering.cpp
@@ -1156,3 +1156,12 @@
   NODE_NAME_CASE(TBUFFER_STORE_FORMAT)
   }
 }
+
+void AMDGPUTargetLowering::computeMaskedBitsForTargetNode(
+  const SDValue Op,
+  APInt &KnownZero,
+  APInt &KnownOne,
+  const SelectionDAG &DAG,
+  unsigned Depth) const {
+  KnownZero = KnownOne = APInt(KnownOne.getBitWidth(), 0); // Don't know anything.
+}