llvm-svn: 78677

 - Some clients which used DOUT have moved to DEBUG. We are deprecating the
   "magic" DOUT behavior which avoided calling printing functions when the
   statement was disabled. In addition to being unnecessary magic, it had the
   downside of leaving code in -Asserts builds, and of hiding potentially
   unnecessary computations.

llvm-svn: 77019

llvm-svn: 65592

Machine LICM increases register pressure and it almost always increase code size. For now, disable it for optimizing for size.

llvm-svn: 63856

llvm-svn: 63854

llvm-svn: 63729

Don't bother hoisting out a "cheap" instruction if all of its uses are PHIs. LICM "cheap" instructions are not particularly beneficial to start with. This will just end up making the copies harder to coalesce.

llvm-svn: 63728

For now, only hoist re-materilizable instructions. LICM will increase register pressure. We want to avoid spilling more instructions if it's possible.

llvm-svn: 63725

loops, hoisting instructions all the way out in one step rather
than hoisting them one nest level at a time. Also, make a few
other code simplifications. This speeds up MachineLICM
by several fold.

llvm-svn: 62283

llvm-svn: 61715

several places. isTerminator() returns true for a superset
of cases, and includes things like FP_REG_KILL, which are
nither return or branch but aren't safe to move/remat/etc.

llvm-svn: 61373

llvm-svn: 61184

isReg, etc., from isRegister, etc.

llvm-svn: 57006

llvm-svn: 55779

llvm-svn: 55578

llvm-svn: 55074

hoisting out some "test" and "cmp" instructions. This was obvious badness.

llvm-svn: 54908

llvm-svn: 53166

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

llvm-svn: 51017

llvm-svn: 50990

possible for it to produce worse code than before.

The rest of this patch is code cleanup.

llvm-svn: 50987

llvm-svn: 48142

llvm-svn: 47629

would have been a Godsend here!

llvm-svn: 47625

llvm-svn: 46930

both work right according to the new flags.

This removes the TII::isReallySideEffectFree predicate, and adds
TII::isInvariantLoad. 

It removes NeverHasSideEffects+MayHaveSideEffects and adds
UnmodeledSideEffects as machine instr flags.  Now the clients
can decide everything they need.

I think isRematerializable can be implemented in terms of the
flags we have now, though I will let others tackle that.

llvm-svn: 45843

Make MachineInstr::getDesc return a reference instead
of a pointer, since it can never be null.

llvm-svn: 45695

that it is cheap and efficient to get.

Move a variety of predicates from TargetInstrInfo into 
TargetInstrDescriptor, which makes it much easier to query a predicate
when you don't have TII around.  Now you can use MI->getDesc()->isBranch()
instead of going through TII, and this is much more efficient anyway. Not
all of the predicates have been moved over yet.

Update old code that used MI->getInstrDescriptor()->Flags to use the
new predicates in many places.

llvm-svn: 45674

llvm-svn: 45573

llvm-svn: 45572

llvm-svn: 45571

llvm-svn: 45569

llvm-svn: 45499

llvm-svn: 45496

instruction. Also, use "splice" to move the new instruction instead of
remove/insert (where it was leaking memory anyway).

llvm-svn: 45492

llvm-svn: 45418

llvm-svn: 45245

llvm-svn: 45178

llvm-svn: 44892

llvm-svn: 44881