a zero constant for a complete class.  rdar://problem/8424975

To make this happen, track the field indexes for virtual bases
in the complete object.  I'm curious whether we might be better
off making CGRecordLayoutBuilder *much* more reliant on
ASTRecordLayout;  we're currently duplicating an awful lot of the ABI
layout logic.

llvm-svn: 125555

functionality intended. 

llvm-svn: 125549

llvm-svn: 125538

builders unhappy.

llvm-svn: 125505

llvm-svn: 125488

FP_CONTRACT pragmas.  Patch originally by ARM.

llvm-svn: 125475

Stmt::const_child_range, then make a bunch of places use them instead
of the individual iterator accessors.

llvm-svn: 125450

destruction in the destructor-aliases logic.  Fixes PR 9197.

llvm-svn: 125447

I also sorted the tools/driver dependencies since their order no
longer matters.

llvm-svn: 125417

llvm-svn: 125360

unnecessary calls to RoundUpToAlignment. No changes to functionality
intended.

llvm-svn: 125356

CharUnits to sizes in bits, and use it to tidy up the places where the
conversion was done explicitly.

llvm-svn: 125332

llvm-svn: 125321

llvm-svn: 125293

llvm-svn: 125289

llvm-svn: 125282

character units.

llvm-svn: 125281

r125156.

llvm-svn: 125280

llvm-svn: 125275

llvm-svn: 125249

llvm-svn: 125210

llvm-svn: 125201

there were only three virtual methods of any significance.

The primary way to grab child iterators now is with
  Stmt::child_range children();
  Stmt::const_child_range children() const;
where a child_range is just a std::pair of iterators suitable for
being llvm::tie'd to some locals.  I've left the old child_begin()
and child_end() accessors in place, but it's probably a substantial
penalty to grab the iterators individually now, since the
switch-based dispatch is kindof inherently slower than vtable
dispatch.  Grabbing them together is probably a slight win over the
status quo, although of course we could've achieved that with vtables, too.

I also reclassified SwitchCase (correctly) as an abstract Stmt
class, which (as the first such class that wasn't an Expr subclass)
required some fiddling in a few places.

There are somewhat gross metaprogramming hooks in place to ensure
that new statements/expressions continue to implement
getSourceRange() and children().  I had to work around a recent clang
bug;  dgregor actually fixed it already, but I didn't want to
introduce a selfhosting dependency on ToT.

llvm-svn: 125183

llvm-svn: 125163

and we later find the definition, make sure that we add the definition
(not the declaration) to the list of deferred definitions to
emit. Fixes PR8864.

Thanks to Nick Lewycky for testing this	patch out

llvm-svn: 125157

functionality intended.

llvm-svn: 125156

destructor or copy constructor than let debug info know about it.

Radar 8945514.

llvm-svn: 125142

setter and getter types mismatch. // rdar://8966864

llvm-svn: 125125

Block{Function,Module} base class.  Minor other refactorings.

Fixed a few address-space bugs while I was there.

llvm-svn: 125085

mutable fields and with trivial destructors and copy constructors.

llvm-svn: 125073

functionality intended.

llvm-svn: 125069

llvm-svn: 125021

  - BlockDeclRefExprs always store VarDecls
  - BDREs no longer store copy expressions
  - BlockDecls now store a list of captured variables, information about
    how they're captured, and a copy expression if necessary
    
With that in hand, change IR generation to use the captures data in       
blocks instead of walking the block independently.        

Additionally, optimize block layout by emitting fields in descending
alignment order, with a heuristic for filling in words when alignment
of the end of the block header is insufficient for the most aligned
field.

llvm-svn: 125005

llvm-svn: 125000

Fix self-host; if a thunk already exists and has available_externally linkage, we should change its linkage instead of asserting.

llvm-svn: 124986

When building with optimizations, emit thunks with available_externally linkage so devirtualized function calls can also be de-thunked.

llvm-svn: 124984

llvm-svn: 124983

won't assert when building a thunk for an implicit virtual member function that is not marked used.

llvm-svn: 124967

We now emit everything except unused implicit virtual member functions when building the vtable.

llvm-svn: 124935

llvm-svn: 124837