to spill after all, we weren't handling 2-instruction
spill sequences correctly (PPC Altivec).  We need to
remove the store in this case.  Removing the other
instruction(s) would be goodness but is not needed for
correctness, and isn't done here.  7331562.

llvm-svn: 85437

llvm-svn: 85436

I'm going to redo this using the OptimizeForSize function attribute.

llvm-svn: 85426

ArraySize * ElementSize
ElementSize * ArraySize
ArraySize << log2(ElementSize)
ElementSize << log2(ArraySize)

Refactor isArrayMallocHelper and delete isSafeToGetMallocArraySize, so that there is only 1 copy of the malloc array determining logic.
Update users of getMallocArraySize() to not bother calling isArrayMalloc() as well.

llvm-svn: 85421

llvm-svn: 85412

opcode and operand with a tab.  Check for these instructions in the usual
places.

llvm-svn: 85411

llvm-svn: 85410

llvm-svn: 85406

llvm-svn: 85402

stuff) to programmatically control the current debug flavor.  While 
I'm at it, doxygenate Debug.h and clean it up.

llvm-svn: 85395

chains have no users, they can't be predecessors of the condition.

llvm-svn: 85394

the new instructions and leave the old one in place.

llvm-svn: 85393

llvm-svn: 85390

llvm-svn: 85389

purposes for GVN/DSE.

llvm-svn: 85383

Checks on Demand algorithm which looks at arbitrary branches instead of loop
iterations. This is GSoC work by Andre Tavares with only editorial changes
applied!

llvm-svn: 85382

llvm-svn: 85381

to depend on Ref and ModRef calls within the invariant region.

llvm-svn: 85380

llvm-svn: 85379

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