[PATCH] Added InstCombine transform for pattern "( A & (~B)) | (A ^ B) -> (A ^ B)"

[David Majnemer]

LGTM with review comments addressed.

================
Comment at: lib/Transforms/InstCombine/InstCombineAndOrXor.cpp:2001
@@ -2000,1 +2000,3 @@
 
+  // ( A & (~B)) | (A ^ B) -> (A ^ B)
+  if (match(Op0, m_And(m_Value(A), m_Not(m_Value(B)))) &&
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Please format this like so:
  // (A & (~B)) | (A ^ B) -> (A ^ B)

http://reviews.llvm.org/D4652