is trivially dead, since these have side effects.  This makes the
(misnamed) MemoryUseIntrinsic class dead, so remove it.

llvm-svn: 120382

llvm-svn: 120381

llvm-svn: 120380

remove an actively-wrong comment.

llvm-svn: 120378

It can be seriously improved, but at least now it isn't intertwined
with the other logic.

llvm-svn: 120377

llvm-svn: 120372

llvm-svn: 120371

queried location doesn't overlap the source, and add a testcase.

llvm-svn: 120370

able to match this yet.

llvm-svn: 120369

contains "ref".

Enhance DSE to use a modref query instead of a store-specific hack
to generalize the "ignore may-alias stores" optimization to handle
memset and memcpy.

llvm-svn: 120368

and which are pseudos.

llvm-svn: 120366

llvm-svn: 120365

llvm-svn: 120364

stores, fix and add a testcase.

llvm-svn: 120363

llvm-svn: 120362

llvm-svn: 120361

llvm-svn: 120360

1. Don't bother trying to optimize:

lifetime.end(ptr)
store(ptr)

as it is undefined, and therefore shouldn't exist.

2. Move the 'storing a loaded pointer' xform up, simplifying
  the may-aliased store code.

llvm-svn: 120359

The only reasonable way I could find to do this is to provide an alternate
version of the addrmode6 operand with a different encoding function.  Use it
for all the VLD-dup instructions for the sake of consistency.

llvm-svn: 120358

in an attempt to make things a little more consistent.

llvm-svn: 120357

The encoding for alignment in VLD4-dup instructions is still a work in progress.

llvm-svn: 120356

llvm-svn: 120354

llvm-svn: 120353

llvm-svn: 120350

llvm-svn: 120347

llvm-svn: 120346

llvm-svn: 120344

locations and formatting specially. rdar://7353441

llvm-svn: 120343

llvm-svn: 120340

assignment instructions from being moved below / above calls.
rdar://8690640

llvm-svn: 120339

llvm-svn: 120338

llvm-svn: 120335

llvm-svn: 120334

instructions. This simplifies instruction printing and disassembly.

llvm-svn: 120333

llvm-svn: 120329

reduces some code duplication.

llvm-svn: 120326

llvm-svn: 120325

llvm-svn: 120324

Transform (extractvalue (load P), ...) to (load (gep P, 0, ...)) if the load has no other uses, shrinking the load.

llvm-svn: 120323

data. Next up, pseudo-izing them.

llvm-svn: 120320