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Commit a16fc2fe authored by Eli Friedman's avatar Eli Friedman
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Teach MachineCSE how to do simple cross-block CSE involving physregs. This... 

Teach MachineCSE how to do simple cross-block CSE involving physregs.  This allows, for example, eliminating duplicate cmpl's on x86. Part of rdar://problem/8259436 .

llvm-svn: 130862
parent 7e005862
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