Modified DataFlowValues and DataflowSolver to associate dataflow value
with CFG *edges* instead of blocks.  This will fascilitate dataflow
analyses that are sensitive to block terminators, and also simplifies
some reasoning.

Updated UninitializedValues to comply to this new interface.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@42099 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed