[PATCH] Allow BB duplication threshold to be adjusted through JumpThreading's ctor

[Sanjay Patel]

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Comment at: lib/Transforms/Scalar/JumpThreading.cpp:50
@@ -49,3 +49,3 @@
           cl::desc("Max block size to duplicate for jump threading"),
           cl::init(6), cl::Hidden);
 
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I have no opinion about the functionality of this patch, but how about giving a name to that magic '6'...like:
   static unsigned BBDuplicateThresholdDefault = 6;

Then you can use that constant as the default parameter assignment, and you don't have to introduce yet another magic number (-1) and cast signed to unsigned.

http://reviews.llvm.org/D5444