qualified name, e.g., 

  foo::x

so that we retain the nested-name-specifier as written in the source
code and can reproduce that qualified name when printing the types
back (e.g., in diagnostics). This is PR3493, which won't be complete
until finished the other tasks mentioned near the end of this commit.

The parser's representation of nested-name-specifiers, CXXScopeSpec,
is now a bit fatter, because it needs to contain the scopes that
precede each '::' and keep track of whether the global scoping
operator '::' was at the beginning. For example, we need to keep track
of the leading '::', 'foo', and 'bar' in
 
  ::foo::bar::x

The Action's CXXScopeTy * is no longer a DeclContext *. It's now the
opaque version of the new NestedNameSpecifier, which contains a single
component of a nested-name-specifier (either a DeclContext * or a Type
*, bitmangled). 

The new sugar type QualifiedNameType composes a sequence of
NestedNameSpecifiers with a representation of the type we're actually
referring to. At present, we only build QualifiedNameType nodes within
Sema::getTypeName. This will be extended to other type-constructing
actions (e.g., ActOnClassTemplateId).

Also on the way: QualifiedDeclRefExprs will also store a sequence of
NestedNameSpecifiers, so that we can print out the property
nested-name-specifier. I expect to also use this for handling
dependent names like Fibonacci<I - 1>::value.

llvm-svn: 67265

llvm-svn: 67260

Use the instantiated expressions to build the ConditionalOperator. This addresses the second part of review feedback.

llvm-svn: 67259

case.

llvm-svn: 67257

PCH support).

llvm-svn: 67256

driver is functional without them.

llvm-svn: 67254

sometimes leaves around.

llvm-svn: 67253

llvm-svn: 67252

llvm-svn: 67250

whose sema decl is at the translation unit.

llvm-svn: 67249

llvm-svn: 67248

SVal::GetRValueSymbolVal do the checking if we can symbolicate a type instead of
having BasicStoreManager do it (which wasn't always doing the check
consistently). Having this check in SVal::GetRValueSymbolVal keeps the check in
one centralized place.

llvm-svn: 67245

if our usual methods fail. This isn't necessary for running the tool,
but improves the accuracy of logging output.

Also, have GCC tools lookup gcc program path.

llvm-svn: 67243

llvm-svn: 67241

''
   '
 '

llvm-svn: 67237

and the token after the # should be expanded if it is not a valid directive.
This allows us to transform things like:

#define FOO BAR
# FOO

into # BAR, even though FOO is not normally expanded for directives.

This should fix PR3833

llvm-svn: 67236

llvm-svn: 67235

# 4 

llvm-svn: 67233

#define Y X ## .
Y

are ok in .S files.

llvm-svn: 67231

programs.

llvm-svn: 67229

llvm-svn: 67226

llvm-svn: 67225

readnone/readonly attributes.

llvm-svn: 67224

 - This is still suboptimal, but should at least be workable.

llvm-svn: 67223

llvm-svn: 67220

llvm-svn: 67219

There are some more complex cases (_Complex and structs)
that I'm still working on.

llvm-svn: 67218

(brings code in line with diagnostic.

llvm-svn: 67217

llvm-svn: 67216

llvm-svn: 67214

llvm-svn: 67207

llvm-svn: 67206

llvm-svn: 67205

llvm-svn: 67204

llvm-svn: 67193

llvm-svn: 67192

 - Support things like telling which -ffoo -fno-foo option won, and
   forwarding all arguments matching a certain set of options to the
   tool.

llvm-svn: 67189

argument translation.

Also, stub out clang tool implementation a bit more.

llvm-svn: 67185

(e.g., -filelist) are currently broken.

llvm-svn: 67183

llvm-svn: 67182