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Commit 5ea74d55 authored by Dan Gohman's avatar Dan Gohman
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Reapply r77654 with a fix: MachineFunctionPass's getAnalysisUsage 

shouldn't do AU.setPreservesCFG(), because even though CodeGen passes
don't modify the LLVM IR CFG, they may modify the MachineFunction CFG,
and passes like MachineLoop are registered with isCFGOnly set to true.

llvm-svn: 77691
parent cd4c3384
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