exit edge to preserve LCSSA.

Fix dominance frontier update during loop unswitch. This fixes PR 1589.

llvm-svn: 40695

llvm-svn: 40564

llvm-svn: 37765

from LoopSimplify.cpp to Dominator.cpp

llvm-svn: 37689

llvm-svn: 37562

llvm-svn: 37561

common dominator.

llvm-svn: 37559

Remove unused PostETForest.

llvm-svn: 37551

llvm-svn: 37548

Fix 80 col violations.

llvm-svn: 37547

This means now ETNodes are not useful anymore.

llvm-svn: 37546

llvm-svn: 37545

Now LoopSimplify does not require nor preserve ETForest.

llvm-svn: 37512

llvm-svn: 37504

This adds redundancy for now.

llvm-svn: 37492

llvm-svn: 37475

llvm-svn: 37417

llvm-svn: 37407

llvm-svn: 37403

llvm-svn: 37314

llvm-svn: 36694

llvm-svn: 36662

Due to darwin gcc bug, one version of darwin linker coalesces
static const int, which defauts PassID based pass identification.

llvm-svn: 36652

llvm-svn: 36632

Fix http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20070416/048092.html

llvm-svn: 36294

llvm-svn: 36094

Remove ImmediateDominator analysis.  The same information can be obtained from DomTree.  A lot of code for
constructing ImmediateDominator is now folded into DomTree construction.

This is part of the ongoing work for PR217.

llvm-svn: 36063

llvm-svn: 36035

in the long process that will be fixing PR 217.

llvm-svn: 36034

llvm-svn: 35815

llvm-svn: 35807

llvm-svn: 35797

llvm-svn: 35775

llvm-svn: 35756

ETForest updating mechanisms don't work as I thought they did.  These changes
will be reapplied once the issue is worked out.

llvm-svn: 35741

llvm-svn: 35731

based on their ordering. This is applicable to ETForest::dominates() also.

llvm-svn: 35423

llvm-svn: 35388

llvm-svn: 35374

based on their ordering.

llvm-svn: 35369