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store r12 -> [ss#2] R3 = load [ss#1] use R3 R3 = load [ss#2] R4 = load [ss#1] and turn it into this code: store R12 -> [ss#2] R3 = load [ss#1] use R3 R3 = R12 R4 = R3 <- oops! The problem was that promoting R3 = load[ss#2] to a copy missed the fact that the instruction invalidated R3 at that point. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23638 91177308-0d34-0410-b5e6-96231b3b80d8 |
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