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Jakob Stoklund Olesen 3e20475fee Fix liveness calculation when splitting critical edges during PHI elimination. 
- Edges are split before any phis are eliminated, so the code is SSA.

- Create a proper IR BasicBlock for the split edges.

- LiveVariables::addNewBlock now has same syntax as
  MachineDominatorTree::addNewBlock. Algorithm calculates predecessor live-out
  set rather than successor live-in set.

This feature still causes some miscompilations.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86867 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-11 19:31:31 +00:00
..
llvm Fix liveness calculation when splitting critical edges during PHI elimination. 2009-11-11 19:31:31 +00:00
llvm-c remove the now dead condprop pass, PR3906. 2009-11-11 05:56:35 +00:00