[llvm-commits] PATCH: new Value::getThruSplat API

[Nick Lewycky]

This patch adds a new method on Value called getThruSplat() which 
returns the splatted value iff this is a ConstantValue with a splat, or 
'this' otherwise. I demonstrate its usage by updating 
InstructionSimplify to uniformly handle splat vectors alongside 
ConstantInt values.

Please review!

Nick
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