[PATCH] Add a callback to FunctionPass to enable skipping execution on a per-function basis

[Chandler Carruth]

LGTM


================
Comment at: include/llvm/Transforms/Scalar.h:18
@@ -17,2 +17,3 @@
 
+#include "llvm/Pass.h"
 #include "llvm/ADT/StringRef.h"
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I think you can remove this now.

http://reviews.llvm.org/D8717

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