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authorEvan Cheng <evan.cheng@apple.com>2010-03-04 01:33:55 +0000
committerEvan Cheng <evan.cheng@apple.com>2010-03-04 01:33:55 +0000
commitb3958e80324884e3d1c1e198a50f212bae0c3b77 (patch)
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Look ahead a bit to determine if a physical register def that is not marked dead is really alive. This is necessary to catch a lot of common cse opportunities for targets like x86.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97706 91177308-0d34-0410-b5e6-96231b3b80d8
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