when building with assertions disabled.

llvm-svn: 137460

MachOWriter: Don't crash on fixups with arithmetic, emit a relocation instead. This matches what as does.

llvm-svn: 137414

Fix by Ivan Baev. Sorry I don't have a unit test, but the fix is obvious so I don't want to delay it.

llvm-svn: 137404

is returned through a bitcast.

llvm-svn: 137402

the retains and releases all use the same SSA pointer value.

Also, don't let CFG hazards disrupt nested retain+release pair
optimizations.

llvm-svn: 137399

rather than plain postorder, so that CFG constructs like single-exit loops
are reliably visited in a sensible order.

llvm-svn: 137398

This is possible now that we now longer provide an interface to iterate
the interference overlaps.

llvm-svn: 137397

llvm-svn: 137389

SCEV unrolling can unroll loops with arbitrary induction variables. It
is a prerequisite for -disable-iv-rewrite performance. It is also
easily handles loops of arbitrary structure including multiple exits
and is generally more robust.

This is under a temporary option to avoid affecting default
behavior for the next couple of weeks. It is needed so that I can
checkin unit tests for updateUnloop.

llvm-svn: 137384

llvm-svn: 137381

The Query class now holds two iterators instead of an InterferenceResult
instance. The iterators are used as bookmarks for repeated
collectInterferingVRegs calls.

llvm-svn: 137380

warning. 

llvm-svn: 137378

llvm-svn: 137375

llvm-svn: 137372

llvm-svn: 137371

llvm-svn: 137370

llvm-svn: 137368

llvm-svn: 137367

llvm-svn: 137364

llvm-svn: 137363

inserts and extracts. This simple combine makes us generate only 1
instruction instead of 11 in the v8 case.

llvm-svn: 137362

llvm-svn: 137359

llvm-svn: 137356

collectInterferingVRegs will be the primary function for interference
checks.

llvm-svn: 137354

llvm-svn: 137353

llvm-svn: 137352

llvm-svn: 137351

No clients are iterating over interference overlaps.

llvm-svn: 137350

llvm-svn: 137347

The InterferenceResult iterator turned out to be less important than we
thought it would be.  LiveIntervalUnion clients want higher level
information, like the list of interfering virtual registers.

llvm-svn: 137346

llvm-svn: 137345

llvm-svn: 137344

llvm-svn: 137342

ancestor loops.

I have a unit test that depends on scev-unroll, which unfortunately
isn't checked in. But I will check it in when I can.

llvm-svn: 137341

llvm-svn: 137340

llvm-svn: 137339

llvm-svn: 137337

llvm-svn: 137331

llvm-svn: 137325

llvm-svn: 137324