independently of whether they're definitions, then teach IR generation to
ignore non-explicit visibility when emitting declarations.  Use this to
make sure that RTTI, vtables, and VTTs get the right visibility.

More of rdar://problem/8613093

llvm-svn: 117781

for namespace-scope variable declarations.

Apply visibility in IR gen to variables that are merely declared
and never defined.  We were previously emitting these with default
visibility unless they were declared with private_extern.

Ignore global visibility settings when computing visibility for
a declaration's context, and key several conditions on whether a
visibility attribute exists anywhere in the hierarchy as opposed
to whether it exists at the current level.

llvm-svn: 117729

declared", it breaks things.

llvm-svn: 117653

and never defined.  We were previously emitting these with default
visibility unless they were declared with private_extern.

Ignore global visibility settings when computing visibility for
a declaration's context, and key several conditions on whether a
visibility attribute exists anywhere in the hierarchy as opposed
to whether it exists at the current level.

llvm-svn: 117644

on if its linkage is weak. Currently this is the
case but may change in the future. (part of radar 
8562966).

llvm-svn: 117452

more closely parallel the computation of linkage.  This gets us to a state
much closer to what gcc emits, modulo bugs, which will undoubtedly arise in
abundance.

llvm-svn: 117147

PR6056, //rdar: //8564463

llvm-svn: 116819

llvm-svn: 116613

llvm-svn: 116595

This enables metadata generation by default, however the TBAA pass
in the optimizer is still disabled for now.

llvm-svn: 116536

It enables clang to compile Mingw's headers.

llvm-svn: 116184

 - Minor style tweaks by me.

llvm-svn: 115056

already be determined by isCopyAssignmentOperator(), and was set too
late in the process for all clients to see the appropriate
value. Cleanup only; no functionality change.

llvm-svn: 114916

translation units that don't catch ObjC types.  rdar://problem/8434851

llvm-svn: 114070

llvm-svn: 113256

instead of asserting in IRGen. Fixes radar 8390459.

llvm-svn: 113253

under the ARM ABI.

llvm-svn: 112588

This lets us remove Sema.h's dependency on Expr.h and Decl.h.

llvm-svn: 112156

objc-nonfragile-abi2 (radar 7824380).

llvm-svn: 111823

Make CGT defer to the ABI on all member pointer types.
This requires giving CGT a handle to the ABI.
It's way easier to make that work if we avoid lazily creating the ABI.
Make it so.

llvm-svn: 111786

it deserves its own enumerator.  Obviously the implementations should
closely follow the Itanium ABI except in cases of divergence.

llvm-svn: 111749

active C++ ABI as a raw string, we store it as an enum. This should improve
performance somewhat.

And yes, this time, I started from a clean build directory, and
all the tests passed. :)

llvm-svn: 111507

Now all classes derived from Attr are generated from TableGen.
Additionally, Attr* is no longer its own linked list; SmallVectors or
Attr* are used. The accompanying LLVM commit contains the updates to
TableGen necessary for this.

Some other notes about newly-generated attribute classes:

 - The constructor arguments are a SourceLocation and a Context&,
   followed by the attributes arguments in the order that they were
   defined in Attr.td

 - Every argument in Attr.td has an appropriate accessor named getFoo,
   and there are sometimes a few extra ones (such as to get the length
   of a variadic argument).

Additionally, specific_attr_iterator has been introduced, which will
iterate over an AttrVec, but only over attributes of a certain type. It
can be accessed through either Decl::specific_attr_begin/end or
the global functions of the same name.

llvm-svn: 111455

and remove getStrData().  Patch by Peter Davies (with some tweaks).

llvm-svn: 111229

a -cc1 option.  The Darwin linker complains about mixed visibility when linking
gcc-built objects with clang-built objects, and the optimization isn't really
that valuable.  Platforms with less ornery linkers can feel free to enable this.

llvm-svn: 110979

llvm-svn: 110530

do the right thing with mixed-visibility symbols, so disable the visibility
optimization where that's possible, i.e. with template classes (since it's
possible that an arbitrary template might be subject to an explicit
instantiation elsewhere).  447.dealII actually does this.

I've put the code under an option that's currently not hooked up to anything.

llvm-svn: 110374

llvm-svn: 110315

Apply hidden visibility to most RTTI;  libstdc++ does not rely on exact
pointer equality for the type info (just the type info names).  Apply
the same optimization to RTTI that we do to vtables.

Fixes PR5962.

llvm-svn: 110192

llvm-svn: 109797

DeclIsRequiredFunctionOrFileScopedVar.

This is essentially a CodeGen predicate that is also needed by the PCH mechanism to determine whether a decl
needs to be deserialized during PCH loading for codegen purposes.
Since this logic is shared by CodeGen and the PCH mechanism, move it to the ASTContext,
thus CodeGenModule's GetLinkageForFunction/GetLinkageForVariable and the GVALinkage enum is moved out of CodeGen.

This fixes current (and avoids future) codegen-from-PCH bugs.

llvm-svn: 109784

we are not supposed to create an improper callsite using a CallInstr; leave a fixme mentioning the simplification when CallSite can clone itself

llvm-svn: 109575

llvm-svn: 109550

DeclIsRequiredFunctionOrFileScopedVar.

This function is part of the public CodeGen interface since it's essentially a CodeGen predicate that is also
needed by the PCH mechanism to determine whether a decl needs to be deserialized during PCH loading for codegen purposes.
This fixes current (and avoids future) codegen-from-PCH bugs.

llvm-svn: 109546

warning flag in clang. Little more to do
for a PCH issue. Radar 6507158.

llvm-svn: 109129

 - This issue here is that /usr/include/Blocks.h wants to define some of the
   block runtime globals as weak, depending on the target. This doesn't work in
   Clang because we aren't using the AST decl for these globals.

 - The fix is a pretty gross hack which just watches all the decls for the
   specific blocks globals we need to know about; if we see one we use it,
   otherwise we use the hand coded type.

   In time, I would like to clean this up by changing IRgen to ask Sema/AST for
   the decl, which would then be lazily loaded from the builtin table if
   necessary. This could be used in a whole host of places in IRgen and would
   get rid of a lot of grotty hand coding of LLVM IR; however, we need some
   extra Sema support for this as well as support for builtin global variables.

llvm-svn: 108482

llvm-svn: 108481

the order they appeared in the translation unit.  If they get emitted, put them
in their proper order.  Fixes rdar://problem/7458115

llvm-svn: 108477

with always_inline attribute. Thanks to Howard for the tip.

llvm-svn: 108469

at -O0. The only change from the previous patch is that we don't try
to generate virtual method thunks for an available_externally
function.

llvm-svn: 108230