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

The current warning in -Wnull-arithmetic for comparisons between NULL and non-pointers is not very helpful.  This patch will update the wording to be more helpful to users.

Old warning:

warning: use of NULL in arithmetic operation [-Wnull-arithmetic]
  return 10 <= NULL;
            ^  ~~~~

New warning:

warning: comparison between NULL and non-pointer ('int' and NULL) [-Wnull-arithmetic]
  return 10 <= NULL;
         ~~ ^  ~~~~
llvm-svn: 137377

llvm-svn: 137376

llvm-svn: 137375

llvm-svn: 137374

either "special" type has already been initialized. Previously, we did
this check based on just the first special type (__builtin_va_list),
but now we have some NULL special type entries to content with.

llvm-svn: 137373

llvm-svn: 137372

llvm-svn: 137371

llvm-svn: 137370

Add diagtool-based test where we enforce that no additional warnings can be added to Clang without a -W flag.

llvm-svn: 137369

llvm-svn: 137368

llvm-svn: 137367

llvm-svn: 137366

It caused an unexpected behavior since r137254.

llvm-svn: 137365

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

1) check for the "v" version of movaps
2) add a couple of CHECK-NOT to guarantee the behavior
3) move to a more appropriate test file

llvm-svn: 137361

llvm-svn: 137360

llvm-svn: 137359

llvm-svn: 137358

llvm-svn: 137357

llvm-svn: 137356

llvm-svn: 137355

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

ASTContext with accessors/mutators. The only functional change is that
the AST writer won't bother writing the id/Class/SEL redefinition type
if it hasn't been explicitly set; previously, it ended up being
written as a synonym for the built-in id/Class/SEL.

llvm-svn: 137349

On Lion, printf is defined in libsystem_c.dylib.

llvm-svn: 137348

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: 137343

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