breaker needs to check all definitions of the antidepenent register to
avoid multiple defs of the same new register.

llvm-svn: 118032

scheduling change in svn 115121.  The CriticalAntiDepBreaker had bad
liveness information.  It was calculating the KillIndices for one scheduling
region in a basic block, rescheduling that region so the KillIndices were
no longer valid, and then using those wrong KillIndices to make decisions
for the next scheduling region.  I've not been able to reduce a small
testcase for this.  Radar 8502534.

llvm-svn: 115400

llvm-svn: 113653

llvm-svn: 112832

llvm-svn: 109468

make sure to allocate enough space in the std::vector.

llvm-svn: 108449

llvm-svn: 108419

get *very* large, but we only need it to be the size of thenumber of pregs.

llvm-svn: 108411

Make post-ra scheduling, anti-dep breaking, and register scavenger (conservatively) aware of predicated instructions. This enables ARM to move if-conversion before post-ra scheduler.

llvm-svn: 106091

for debug information.

llvm-svn: 105324

llvm-svn: 105300

llvm-svn: 103807

and End arguments by-value rather than by-reference.

llvm-svn: 101830

llvm-svn: 97765

multiple register definitions.

llvm-svn: 92864

llvm-svn: 92837

Change errs() to dbgs().

llvm-svn: 92490

llvm-svn: 90970

Remove some old experimental code that is no longer needed. Remove additional, speculative scheduling pass as its cost did not translate into significant performance improvement. Minor tweaks.

llvm-svn: 89471

Do a scheduling pass ignoring anti-dependencies to identify candidate registers that should be renamed.

llvm-svn: 85939

llvm-svn: 85127