llvm-svn: 55792

llvm-svn: 55786

llvm-svn: 55779

Do not try to update dominator info while manipulating CFG.  This code does not handle all cases and keeps invalid dom info around some cases, which misleads other passes down stream.

Right now, dom info is recaluclated in the end if the loop is switched.

llvm-svn: 53106

llvm-svn: 53090

llvm-svn: 53087

llvm-svn: 53086

llvm-svn: 53085

llvm-svn: 53062

llvm-svn: 53052

llvm-svn: 53007

llvm-svn: 53006

Keep track of currentLoop.

llvm-svn: 53005

llvm-svn: 52438

llvm-svn: 51887

use it instead of duplicating its functionality.

llvm-svn: 51499

several things that were neither in an anonymous namespace nor static
but not intended to be global.

llvm-svn: 51017

llvm-svn: 50696

r48047 r48084 r48085 r48086 r48088 r48096 r48099 r48109 and r48123.

llvm-svn: 50265

llvm-svn: 50016

Specifically, introduction of XXX::Create methods
for Users that have a potentially variable number of
Uses.

llvm-svn: 49277

and also update the cloning interface's major user, the loop optimizations.

llvm-svn: 48088

llvm-svn: 45418

Get rid of annoying spaces.

llvm-svn: 45100

Make LoopInfoBase more generic, in preparation for having MachineLoopInfo.  This involves a small interface change.

llvm-svn: 44348

Do not walk invalid iterator.

llvm-svn: 42812

unswitch when frontier includes basic blocks that 
are not inside loop.

llvm-svn: 42654

llvm-svn: 42591

llvm-svn: 42590

llvm-svn: 42180

llvm-svn: 41207

Fix GLIBCXX_DEBUG error triggered by incrementing erased iterator.

llvm-svn: 40897

gvn, gvnpre, dse, and predsimplify.  To see these, use:

  make check-line-length

llvm-svn: 40738

exit edge to preserve LCSSA.

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

llvm-svn: 40737

llvm-svn: 40698

exit edge to preserve LCSSA.

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

llvm-svn: 40695

llvm-svn: 40673

Use simple analysis interface to preserve analysis info maintained by other loop passes.

llvm-svn: 40627

llvm-svn: 40609

llvm-svn: 40606