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This allows abitrary groups of processor resources. Using something in a subset automatically counts againts the superset. Currently, this only works if the superset is also a ProcResGroup as opposed to a SuperUnit. This allows SandyBridge to be expressed naturally, which will be checked in shortly. def SBPort01 : ProcResGroup<[SBPort0, SBPort1]>; def SBPort15 : ProcResGroup<[SBPort1, SBPort5]>; def SBPort23 : ProcResGroup<[SBPort2, SBPort3]>; def SBPort015 : ProcResGroup<[SBPort0, SBPort1, SBPort5]>; git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177112 91177308-0d34-0410-b5e6-96231b3b80d8
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