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Commit a12d82b4 authored by Hal Finkel's avatar Hal Finkel
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Expose InsertPreheaderForLoop from LoopSimplify to other passes 

Other passes, PPC counter-loop formation for example, also need to add loop
preheaders outside of the regular loop simplification pass. This makes
InsertPreheaderForLoop a global function so that it can be used by other
passes.

No functionality change intended.

llvm-svn: 182299
parent 4c47d87b
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