Chris Lattner 1905ae69c1 When a virtual register is folded into an instruction, keep track of whether ...

it was a use, def, or both.  This allows us to be less pessimistic in our
analysis of them.  In practice, this doesn't make a big difference, but it
doesn't hurt either.

llvm-svn: 16632

2004-10-01 23:15:36 +00:00

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