registers for a given virtual register.

Reserved registers are filtered from the allocation order, and any valid hint is
returned as the first suggestion.

For target dependent hints, a number of arcane target hooks are invoked.

llvm-svn: 121497

llvm-svn: 121496

QualType::getTypePtr(). It turns out that
cast_or_null/dyn_cast_or_null don't actually use simplify_type, so
they're guaranteed to operator on non-NULL QualType or CanQualType
objects.

Good for a 0.6% win on 403.gcc's combine.c with -emit-llvm.

llvm-svn: 121495

llvm-svn: 121494

llvm-svn: 121493

We should not substitute template types if the template has a dependent
context because the template argument stack is not yet fully formed.
Instead, defer substitution until the template has a non-dependent
context (i.e. instantiation of an outer template).

llvm-svn: 121491

llvm-svn: 121490

common base for ExtQuals and Type that stores the underlying type
pointer. This results in a 2% performance win for -emit-llvm on a
typical C file, with 1% memory growth in the AST.

Note that there is an API change in this optimization:
QualType::getTypePtr() can no longer be invoked on a NULL
QualType. If the QualType might be NULL, use
QualType::getTypePtrOrNull(). I've audited all uses of getTypePtr() in
the code base and changed the appropriate uses over to
getTypePtrOrNull(). 

A future optimization opportunity would be to distinguish between
cast/dyn_cast and cast_or_null/dyn_cast_or_null; for the former, we
could use getTypePtr() rather than getTypePtrOrNull(), to take another
branch out of the cast/dyn_cast implementation.

llvm-svn: 121489

llvm-svn: 121488

llvm-svn: 121486

llvm-svn: 121485

Another git-svn dcommit test. (last time I got access and client errors and it broke everything locally;/)

llvm-svn: 121484

llvm-svn: 121483

llvm-svn: 121482

llvm-svn: 121481

llvm-svn: 121479

space better.  Remove this reference.  To make that work, change some APIs
(most importantly, getDesugaredType()) to take an ASTContext& if they
need to return a QualType.  Simultaneously, diminish the need to return a
QualType by introducing some useful APIs on SplitQualType, which is
just a std::pair<const Type *, Qualifiers>.

llvm-svn: 121478

llvm-svn: 121477

llvm-svn: 121476

llvm-svn: 121475

increasing the required type alignment from 8 to 16. This provides a
2.5% speedup for -fsyntax-only on a token-cached Cocoa.h, while only
increasing memory consumption in the ASTContext by 0.8%.

llvm-svn: 121474

llvm-svn: 121473

llvm-svn: 121472

llvm-svn: 121471

another preprocessing cursor, since we want the outermost one.

llvm-svn: 121470

llvm-svn: 121469

llvm-svn: 121468

llvm-svn: 121467

llvm-svn: 121466

llvm-svn: 121465

Clang was only specifying the overloaded result type.  PR8483.

llvm-svn: 121464

Remove dead header.

llvm-svn: 121463

llvm-svn: 121462

llvm-svn: 121461

llvm-svn: 121460

visibility.  Fixes PR8713.

I've disabled a test which was testing that you can #pragma pop visibility
to get out of a namespace's visibility attribute.  We should probably just
diagnose that as an error unless it's instrumental to someone's system
headers.

llvm-svn: 121459

llvm-svn: 121458

through a KVO swizzled object's method calls.

llvm-svn: 121457

information.  Previously, "operator[]" was not
being recognized because the detector was looking
for "operator " as a prefix.  Now we handle both
cases.

llvm-svn: 121456

cmake/modules/AddLLVM.cmake: Add empty "phony" target in add_llvm_loadable_module() even if loadable module were not supported.

llvm-svn: 121455