[PATCH] [MemCpyOpt] Turn memcpy from just-memset'd source into memset.

[Daniel Berlin]

REPOSITORY
  rL LLVM

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Comment at: lib/Transforms/Scalar/MemCpyOptimizer.cpp:931
@@ -901,1 +930,3 @@
+}
+
 /// processMemCpy - perform simplification of memcpy's.  If we have memcpy A
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So, this looks like a valid optimization, and in fact, i expect things like GVN would like this form better than the original.

But I am curious how often it actually happens.

Do you have real programs where this triggers?

http://reviews.llvm.org/D9682

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