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Author SHA1 Message Date
Evan Cheng 3c12fc4342 On some targets, non-move instructions can become move instructions because of coalescing. e.g. 
vr2 = OR vr0, vr1
=>
vr2 = OR vr1, vr1   // after coalescing vr0 with vr1

Update the value# of the destination register with the copy instruction if that happens.

llvm-svn: 56165
 2008-09-12 18:13:14 +00:00