Chris Lattner c49a9a5d76 Stop LiveVariables from using BasicBlocks as part of the mapping, instead ...

use MachineBasicBlocks.  To do this, we traverse the Machine CFG instead of
the LLVM CFG, which is also *MUCH* more efficient by having fewer levels of
indirections and mappings.

llvm-svn: 13301

2004-05-01 21:24:24 +00:00

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