Dan Gohman 52ed61204b Make LoopSimplify change conditional branches in loop exiting blocks ... which branch on undef to branch on a boolean constant for the edge exiting the loop. This helps ScalarEvolution compute trip counts for loops. Teach ScalarEvolution to recognize single-value PHIs, when safe, and ForgetSymbolicName to forget such single-value PHI nodes as apprpriate in ForgetSymbolicName. llvm-svn: 97126		2010-02-25 06:57:05 +00:00
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2007-07-23-InfiniteLoop.ll
2008-05-06-Phi.ll
dcetest.ll
dg.exp
multiple-exit-conditions.ll
simplify-then-delete.ll