Chris Lattner 29126b65c4 Do not mark obviously unreachable blocks live when processing PHI nodes,
and handle incomplete control dependences correctly.  This fixes:

Regression/Transforms/ADCE/dead-phi-edge.ll
  -> a missed optimization

Regression/Transforms/ADCE/dead-phi-edge.ll
  -> a compiler crash distilled from QT4

llvm-svn: 20227
2005-02-17 19:28:49 +00:00
..
2005-01-08 19:48:40 +00:00