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Chris Lattner
93c46b83b6
Make the "pruning cloner" smarter. As it propagates constants through the
code (while cloning) it often gets the branch/switch instructions. Since it knows that edges of the CFG are dead, it need not clone (or even look) at the obviously dead blocks. This should speed up the inliner substantially on code where there are lots of inlinable calls to functions with constant arguments. On C++ code in particular, this kicks in. llvm-svn: 28641
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