purely local for now.

llvm-svn: 85378

round trip blockaddress through .ll and .bc files, so add a testcase.

There are still a bunch of places in the optimizer and other places
that need to be updated to work with these constructs, but at least
the basics are in now.

llvm-svn: 85377

llvm-svn: 85376

In the new world order, BlockAddress can have a BasicBlock operand.
This doesn't permute much, because if you have a ConstantExpr (or
anything more specific than Constant) we still know the operand has
to be a Constant.

llvm-svn: 85375

readonly section if a reference to the containing function
is valid in the readonly section.

llvm-svn: 85370

recursive to avoid consuming extraordinary amounts of stack space
when processing tall graphs.

llvm-svn: 85369

$ llvm-as foo.ll -d -disable-output

which reads and prints the .ll file.  BC encoding is the
next project.  Testcase will go in once that works.

llvm-svn: 85368

llvm-svn: 85367

zap BlockAddress values.

llvm-svn: 85366

otherwise unhoistable instructions in order to allow the loads
to be hoisted.

llvm-svn: 85364

llvm-svn: 85362

llvm-svn: 85361

MachineLICM and other things which run before LiveVariables is run.

llvm-svn: 85360

if they have compatible encodings.

llvm-svn: 85359

llvm-svn: 85358

eliminating a use of MVT::Flag, this is needed for an upcoming CodeGen
change.

This unfortunately requires SystemZ to switch to the list-burr
scheduler, in order to handle the physreg defs properly, however
that's what LLVM has available at this time.

llvm-svn: 85357

llvm-svn: 85355

llvm-svn: 85351

untested and there is no way to use it, next up: doing battle
with asmparser.

llvm-svn: 85349

use it to control tail merging when there is a tradeoff between performance
and code size.  When there is only 1 instruction in the common tail, we have
been merging.  That can be good for code size but is a definite loss for
performance.  Now we will avoid tail merging in that case when the
optimization level is "Aggressive", i.e., "-O3".  Radar 7338114.

Since the IfConversion pass invokes BranchFolding, it too needs to know
the optimization level.  Note that I removed the RegisterPass instantiation
for IfConversion because it required a default constructor.  If someone
wants to keep that for some reason, we can add a default constructor with
a hard-wired optimization level.

llvm-svn: 85346

colliding with llvm/ADT/ValueMap.h:ValueMap<>.

llvm-svn: 85344

llvm-svn: 85341

Fixed a bug in the coalescer where intervals were occasionally merged despite a real interference. This fixes rdar://problem/7157961.

llvm-svn: 85338

llvm-svn: 85335

llvm-svn: 85334

default behind a command line option. This will enable better performance for
vectors on NEON enabled processors.

llvm-svn: 85333

llvm-svn: 85332

llvm-svn: 85331

llvm-svn: 85329

llvm-svn: 85327

llvm-svn: 85325

llvm-svn: 85323

llvm-svn: 85319

llvm-svn: 85318

llvm-svn: 85316

llvm-svn: 85312

llvm-svn: 85311

llvm-svn: 85299

Do not held on to DenseMap slot accross map insertion. The insertion may cause the map to grow rending the slot invalid.
Use this opportunity to use ValueMap instead of DenseMap.

llvm-svn: 85298

BL_pred and BLr9_pred.

llvm-svn: 85297