[PATCH] Add target hook to allow merging stores of nonzero constants

[hfinkel at anl.gov]

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Comment at: include/llvm/Target/TargetLowering.h:270
@@ -269,1 +269,3 @@
 
+  /// Return true if it is expected to be cheaper to do a store of a non-zero
+  /// vetor constant with the given size and type for the address space.
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This does not explain well what this does. Cheaper than what?

http://reviews.llvm.org/D9956

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