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a063e19593
This actually makes everything slower, but the plan is to have isel add <kill> flags the way it is already adding <dead> flags. Then LiveVariables can be removed again. When ignoring the time spent in LiveVariables, -regalloc=fast is now twice as fast as -regalloc=local. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102034 91177308-0d34-0410-b5e6-96231b3b80d8
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