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8e4eaabdb8
Specify an allocation order with a register class. This is used by register allocators with a greedy heuristic. This is usefull as it is sometimes beneficial to color more constrained classes first. Differential Revision: http://reviews.llvm.org/D8626 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@233743 91177308-0d34-0410-b5e6-96231b3b80d8