[PATCH] Fix bug 23851: Preserve metadata for the unswitched branch in loop-unswitch

[hfinkel at anl.gov]

================
Comment at: lib/Transforms/Scalar/LoopUnswitch.cpp:693
@@ -687,1 +692,3 @@
 
+static void copyMetaData(Instruction *DstInst, const Instruction *SrcInst,
+                         bool Swapped) {
----------------
Please name this
  copyMetadata
the convention is not to capitalize the d.


================
Comment at: lib/Transforms/Scalar/LoopUnswitch.cpp:720
@@ +719,3 @@
+        }
+      }
+    case LLVMContext::MD_dbg:
----------------
I'd prefer there be a
  // fallthrough
comment here.

http://reviews.llvm.org/D10458

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