- Do not expose Critical Edge breaking mechanics outside the BCE pass, thus
removing it from Transforms/Local.h and from Transforms/Utils/*

llvm-svn: 3910

- Expose passinfo from BreakCriticalEdges pass so that it may be "Required"
by other passes. Make BCE pass be in anonymous namespace now.

llvm-svn: 3907

Add new BreakCriticalEdges pass

llvm-svn: 3903