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Commit 3fffe621 authored by Lang Hames's avatar Lang Hames
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Replaces uses of unsigned for indexes in LiveInterval and VNInfo with 

a new class, MachineInstrIndex, which hides arithmetic details from
most clients. This is a step towards allowing the register allocator
to update/insert code during allocation.

llvm-svn: 81040
parent d14b67e9
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