is currently off by default, and can be enabled with
-disable-post-RA-scheduler=false.

This doesn't have a significant impact on most code yet because it doesn't
yet do anything to address anti-dependencies and it doesn't attempt to
disambiguate memory references. Also, several popular targets
don't have pipeline descriptions yet.

The majority of the changes here are splitting the SelectionDAG-specific
code out of ScheduleDAG, so that ScheduleDAG can be moved to
libLLVMCodeGen.a. The interface between ScheduleDAG-using code and
the rest of the scheduling code is somewhat rough and will evolve.

llvm-svn: 59676

a virtual method of SelectionDAG.

llvm-svn: 59667

dump in terms of it.

llvm-svn: 59665

llvm-svn: 59662

Do not use separate utility to walk all instructions and remove dead dbg intrinsics. Let instcombiner do this job.

llvm-svn: 59659

llvm-svn: 59658

If there are two consecutive llvm.dbg.stoppoint calls then
it is likely that the optimizer deleted code in between these
two intrinsics. Keep only the last llvm.dbg.stoppoint in this case.

llvm-svn: 59657

llvm-svn: 59655

right thing and promote the store to i8.

llvm-svn: 59648

Discourage (allocate last) use of x86_64 R12 and R13 due to their
longer instruction encodings.

llvm-svn: 59644

llvm-svn: 59637

llvm-svn: 59629

llvm-svn: 59623

llvm-svn: 59621

ExpandIntegerOperand (LegalizeIntegerTypes.cpp) is needed which is yet to be reworked and submitted. 

llvm-svn: 59617

llvm-svn: 59614

llvm-svn: 59587

llvm-svn: 59580

llvm-svn: 59577

llvm-svn: 59576

llvm-svn: 59570

llvm-svn: 59569

print in the correct order.

llvm-svn: 59567

llvm-svn: 59566

instruction.

llvm-svn: 59563

llvm-svn: 59562

Register scavenger should process early clobber defs first. A dead early clobber def should not interfere with a normal def which happens one slot later.

llvm-svn: 59559

This pass makes it easier to test wheter debugging info. influences optimization passes or not.

llvm-svn: 59552

they trap on divide-by-zero, and this side effect is otherwise
unmodeled.

llvm-svn: 59551

consistent with ScheduleNodeTopDown methods.

llvm-svn: 59550

llvm-svn: 59549

and FP_ROUND.  Not sure what these were doing
here - probably they were sometimes (wrongly)
created with integer operands somewhere that
has since been fixed.

llvm-svn: 59548

Remove all dead globals from llvm.metadata.
Ignore linkonce linkage for selected llvm.dbg values.

llvm-svn: 59547

supposed to be any functionality change.

llvm-svn: 59545

Fix a bug introduced by my previous patch.  With this change, SPEC is now clean with prealloc splitting enabled.

llvm-svn: 59544

llvm-svn: 59542

llvm-svn: 59540

llvm-svn: 59538

llvm-svn: 59532

SCALAR_TO_VECTOR.  I didn't add the testcase, because
once llc gets past scalar-to-vector it hits a SPU target
lowering bug and explodes.

llvm-svn: 59530