[PATCH] Change the policy of ZERO_EXTEND/SIGN_EXTEND for SelectionDAG builder and legalization

[Tim Northover]

Hi Jiangning,

Thanks for updating again. I think this looks fine apart from one tiny formatting thing I spotted (sorry). Feel free to commit it with that change.

Tim.

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Comment at: lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp:760-761
@@ -759,1 +759,4 @@
 
+static ISD::NodeType getPreferredExtendForValue(const Value *V)
+{
+  // For the users of the source value being used for compare instruction, if
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Formatting.

http://reviews.llvm.org/D4967