Fix regression in pointer comparison with NULL (e.g., 0 != ptr). This fixes
<rdar://problem/6732151>.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67954 91177308-0d34-0410-b5e6-96231b3b80d8

Introduce a new OpaquePtr<N> struct type, which is a simple POD wrapper for a
pointer.  Its purpose in life is to be a glorified void*, but which does not
implicitly convert to void* or other OpaquePtr's with a different UID.

Introduce Action::DeclPtrTy which is a typedef for OpaquePtr<0>.  Change the
entire parser/sema interface to use DeclPtrTy instead of DeclTy*.  This
makes the C++ compiler enforce that these aren't convertible to other opaque
types.

We should also convert ExprTy, StmtTy, TypeTy, AttrTy, BaseTy, etc,
but I don't plan to do that in the short term.

The one outstanding known problem with this patch is that we lose the
bitmangling optimization where ActionResult<DeclPtrTy> doesn't know how to
bitmangle the success bit into the low bit of DeclPtrTy.  I will rectify
this with a subsequent patch.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67952 91177308-0d34-0410-b5e6-96231b3b80d8

sort alphabetically

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67951 91177308-0d34-0410-b5e6-96231b3b80d8

Adjust control-flow endpoints for '&&' and '||'.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67948 91177308-0d34-0410-b5e6-96231b3b80d8

Add comparison operators for PathDiagosticLocation.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67947 91177308-0d34-0410-b5e6-96231b3b80d8

Add comparison operators for SourceRange.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67946 91177308-0d34-0410-b5e6-96231b3b80d8

CMake: remove TranslationUnit.cpp from build (file has been removed).

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67944 91177308-0d34-0410-b5e6-96231b3b80d8

move file to proper place.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67933 91177308-0d34-0410-b5e6-96231b3b80d8

As Eli pointed out, it is possible that a namespace lookup is ambiguous!

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67932 91177308-0d34-0410-b5e6-96231b3b80d8

add accessors.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67929 91177308-0d34-0410-b5e6-96231b3b80d8

some random cleanups

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67928 91177308-0d34-0410-b5e6-96231b3b80d8

eliminate unneeded iterator wrappers.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67927 91177308-0d34-0410-b5e6-96231b3b80d8

change NamespaceDecl to hold its 'NextNamespace' pointer itself
instead of in NextDeclarator.  This temporarily increases memory
usage, but simplifies and decouples things.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67926 91177308-0d34-0410-b5e6-96231b3b80d8

Check that the alias points to a valid namespace.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67925 91177308-0d34-0410-b5e6-96231b3b80d8

Properly escape special characters in <string>'s in plist file.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67924 91177308-0d34-0410-b5e6-96231b3b80d8

rename some methods.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67923 91177308-0d34-0410-b5e6-96231b3b80d8

Cleanups for DeclGroup.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67922 91177308-0d34-0410-b5e6-96231b3b80d8

Check that the namespace alias doesn't conflict with a previous declaration in this scope.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67921 91177308-0d34-0410-b5e6-96231b3b80d8

tidy whitespace.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67920 91177308-0d34-0410-b5e6-96231b3b80d8

rename NextDeclInScope to NextDeclInContext, since the pointer
points within contexts not scopes.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67919 91177308-0d34-0410-b5e6-96231b3b80d8

simplify getNextDeclInScope

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67918 91177308-0d34-0410-b5e6-96231b3b80d8

reduce indentation, no functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67916 91177308-0d34-0410-b5e6-96231b3b80d8

Add an ActOnNamespaceAliasDef action and have the parser call it.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67915 91177308-0d34-0410-b5e6-96231b3b80d8

remove TranslationUnit.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67914 91177308-0d34-0410-b5e6-96231b3b80d8

push more ASTContext goodness out through interfaces that use
 TranslationUnit

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67913 91177308-0d34-0410-b5e6-96231b3b80d8

Revert Sebastian's rvalue patch (r67870) since it caused test failures in

SemaCXX//overload-member-call.cpp
SemaCXX//overloaded-operator.cpp
SemaTemplate//instantiate-method.cpp

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67912 91177308-0d34-0410-b5e6-96231b3b80d8

remove TranslationUnit from ParseAST.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67911 91177308-0d34-0410-b5e6-96231b3b80d8

change HandleTranslationUnit to take an ASTContext instead of TranslationUnit

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67910 91177308-0d34-0410-b5e6-96231b3b80d8

Text PathDiagnosticBuilder::getEnclosingStmt() about '?'

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67909 91177308-0d34-0410-b5e6-96231b3b80d8

Parse namespace aliases.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67908 91177308-0d34-0410-b5e6-96231b3b80d8

remove dead ivar.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67907 91177308-0d34-0410-b5e6-96231b3b80d8

simplify away some dead ownership stuff, TranslationUnit is now
just a wrapper around ASTContext.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67906 91177308-0d34-0410-b5e6-96231b3b80d8

hoist TranslationUnit some more.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67905 91177308-0d34-0410-b5e6-96231b3b80d8

eliminate some wrappers.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67904 91177308-0d34-0410-b5e6-96231b3b80d8

eliminate ReadASTBitcodeFile

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67903 91177308-0d34-0410-b5e6-96231b3b80d8

move serialization logic from TranslationUnit to ASTContext.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67902 91177308-0d34-0410-b5e6-96231b3b80d8

Teach PathDiagnosticBuilder::getEnclosingStmtLocation() about while/if/do/for,
etc., so that the "body" is always considered a top-level statement for edge
transitions (even if it is an expression).

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67901 91177308-0d34-0410-b5e6-96231b3b80d8

don't poke at TranslationUnit directly

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67900 91177308-0d34-0410-b5e6-96231b3b80d8

Trivial cleanup.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67899 91177308-0d34-0410-b5e6-96231b3b80d8

Move where block-related variables are initialized so that block
types don't get generated when blocks aren't used.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67898 91177308-0d34-0410-b5e6-96231b3b80d8

Fix silly mistake in test.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67897 91177308-0d34-0410-b5e6-96231b3b80d8

Minor cleanup.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67896 91177308-0d34-0410-b5e6-96231b3b80d8

Misc small fixes/cleanups/comment changes.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67895 91177308-0d34-0410-b5e6-96231b3b80d8

eliminate ASTConsumer::InitializeTU, all clients are
happy with just ASTContext, they don't need a TU.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67894 91177308-0d34-0410-b5e6-96231b3b80d8

revert mike's patch which broke test/CodeGen/no-common.c.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67893 91177308-0d34-0410-b5e6-96231b3b80d8

remove TranslationUnit::OwnsDecls, which is only set, never read.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67891 91177308-0d34-0410-b5e6-96231b3b80d8

simplify ParseAST by sucking -disable-free handling logic up into
clang.cpp

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67890 91177308-0d34-0410-b5e6-96231b3b80d8

Change compound assignment operators to keep track of both the promoted
LHS type and the computation result type; this encodes information into
the AST which is otherwise non-obvious.  Fix Sema to always come up with the
right answer for both of these types.  Fix IRGen and the analyzer to
account for these changes.  This fixes PR2601.  The approach is inspired
by PR2601 comment 2.

Note that this changes real *= complex in CodeGen from a silent
miscompilation to an explicit error.

I'm not really sure that the analyzer changes are correct, or how to
test them... someone more familiar with the analyzer should check those
changes.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67889 91177308-0d34-0410-b5e6-96231b3b80d8

Implement access checking for protected base classes.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67887 91177308-0d34-0410-b5e6-96231b3b80d8

move StatListener out to top level.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67886 91177308-0d34-0410-b5e6-96231b3b80d8

Make our diagnostics about the obsolete GNU designated-initializer
syntax into extension warnings, and provide code-modification hints
showing how to fix the problem.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67885 91177308-0d34-0410-b5e6-96231b3b80d8

various cleanups, no functionality change

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67883 91177308-0d34-0410-b5e6-96231b3b80d8

Better way to free NestedNameSpecifiers. Thanks, Chris

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67880 91177308-0d34-0410-b5e6-96231b3b80d8

Fix <rdar://problem/6724396>, where we were silently dropping
GNU-style array designators, causing us to emit broken initializers.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67878 91177308-0d34-0410-b5e6-96231b3b80d8

Perform a very, very ugly song-and-dance number to free the
NestedNameSpecifiers without causing problems for the FoldingSet that
contains them.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67877 91177308-0d34-0410-b5e6-96231b3b80d8

Do not emit debug information for variables while generating optimized code.  The llvm optimizer and code generator are not yet ready to support optimized code debugging.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67876 91177308-0d34-0410-b5e6-96231b3b80d8

Initial implementation of parsing, semantic analysis, and template
instantiation for C++ typename-specifiers such as

  typename T::type

The parsing of typename-specifiers is relatively easy thanks to
annotation tokens. When we see the "typename", we parse the
typename-specifier and produce a typename annotation token. There are
only a few places where we need to handle this. We currently parse the
typename-specifier form that terminates in an identifier, but not the
simple-template-id form, e.g.,

  typename T::template apply<U, V>

Parsing of nested-name-specifiers has a similar problem, since at this
point we don't have any representation of a class template
specialization whose template-name is unknown.

Semantic analysis is only partially complete, with some support for
template instantiation that works for simple examples.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67875 91177308-0d34-0410-b5e6-96231b3b80d8

Add missing header file change.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67871 91177308-0d34-0410-b5e6-96231b3b80d8

Better overload resolution for rvalue references.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67870 91177308-0d34-0410-b5e6-96231b3b80d8

BugReporter: For control-flow edges from 'if', 'for', 'do', 'while' to
successor, using 'getEnclosingStmt()' to have the end location be the top-level
Stmt* enclosing the target Expr*.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67869 91177308-0d34-0410-b5e6-96231b3b80d8

Finish off semantic analysis for regparm, and remove the warning.  Also
remove a redundant error in CodeGen.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67868 91177308-0d34-0410-b5e6-96231b3b80d8

Fix test failures caused by reading memory after freeing it.  My fix is
rather nasty, but I can't think of a better fix off the top of my head.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67867 91177308-0d34-0410-b5e6-96231b3b80d8

BugReporter: PathDiagnosticBuilder::ExecutionContinues now returns a
PathDiagnosticLocation.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67866 91177308-0d34-0410-b5e6-96231b3b80d8

minor cleanups: make getIdentifierNamespace() be a single load
instead of a load + large inlined switch.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67864 91177308-0d34-0410-b5e6-96231b3b80d8

Fixup -fcommon and -fno-common to be more gcc compatible.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67863 91177308-0d34-0410-b5e6-96231b3b80d8

reduce # const_casts, no functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67861 91177308-0d34-0410-b5e6-96231b3b80d8

It is OK to cast to a private base class if the current member belongs to the class that the private base class is a base of:

class A {};
class B : private A {
  void f(B *b) { A* a = b; }
};

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67860 91177308-0d34-0410-b5e6-96231b3b80d8

Add a Class field to the base path element structure. This holds the record decl of the class taht the base is a base of.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67859 91177308-0d34-0410-b5e6-96231b3b80d8

change Decl::DeclCtx to use a PointerIntPair instead of hand bitmangling.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67858 91177308-0d34-0410-b5e6-96231b3b80d8

Besides the warning, issue unsupported diagnostics in
ir gen. No intended change in functionality.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67857 91177308-0d34-0410-b5e6-96231b3b80d8

push line markers through -E mode.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67854 91177308-0d34-0410-b5e6-96231b3b80d8

Update "Getting Started" with more current information about 'clang-cc' and 'clang'.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67850 91177308-0d34-0410-b5e6-96231b3b80d8

analyzer plist: For PathDiagnosticControlFlowPieces, now output an array of
start-end points, where start and end are source ranges.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67847 91177308-0d34-0410-b5e6-96231b3b80d8

Emit aggregate "location" for PathDiagnostic to plist.  This fixes <rdar://problem/6729558>.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67845 91177308-0d34-0410-b5e6-96231b3b80d8

Move declaration of 'PathDiagnostic' to the end of PathDiagnostic.h and add PathDiagnostic::getLocation().

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67842 91177308-0d34-0410-b5e6-96231b3b80d8

Driver: Pass -f[no-]pascal-strings on to clang, even if it has been
turned into -m[no-]pascal-strings by the tool chain.
 - This still has issue that derived arguments don't propogate "used"
   information correctly so spurious "argument unused" warnings will
   still show up.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67841 91177308-0d34-0410-b5e6-96231b3b80d8

PathDiagnostic: replace 'std::list' with 'std::deque'

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67840 91177308-0d34-0410-b5e6-96231b3b80d8

Add iterators to PathDiagnosticControlFlowDiagnostic for iterating over the
multiple location vectors.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67838 91177308-0d34-0410-b5e6-96231b3b80d8

Driver: -print-libgcc-file-name was searching wrong path list.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67837 91177308-0d34-0410-b5e6-96231b3b80d8

Implement checking for base class access. Right now it's overly conservative but that will change. (Also, protected isn't implemented right now).

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67827 91177308-0d34-0410-b5e6-96231b3b80d8

If the user is trying to apply the -> or . member reference operator
to a function or function pointer, it's probably because the user
forgot to put in parentheses () to call the function.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67826 91177308-0d34-0410-b5e6-96231b3b80d8

remove dead code.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67825 91177308-0d34-0410-b5e6-96231b3b80d8

Update CMake

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67824 91177308-0d34-0410-b5e6-96231b3b80d8

Remove the code insertion hint for implicit int. Too often, we're wrong about this hint, so it loses its usefulness. Maybe some day we can make the hint smart enough to be useful.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67823 91177308-0d34-0410-b5e6-96231b3b80d8

BugReporter:
- Added an internal helper class 'PathDiagnosticBuilder' which now bundles the
  'ExecutionContinues' methods.
- Added preliminary diagnostics for short-circuit '&&' and '||'

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67822 91177308-0d34-0410-b5e6-96231b3b80d8

Add a stubbed out CheckBaseClassAccess method.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67821 91177308-0d34-0410-b5e6-96231b3b80d8

Move Sema::SetMemberAccessSpecifier to SemaAccess.cpp

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67820 91177308-0d34-0410-b5e6-96231b3b80d8

Add SemaAccess.cpp

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67819 91177308-0d34-0410-b5e6-96231b3b80d8

Improve recovery when a constructor fails to type-check. Test case from Anders

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67818 91177308-0d34-0410-b5e6-96231b3b80d8

Tests and fixes for templates declared within (non-template)
classes. Test case from Anders Carlsson, fix from Piotr Rak!

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67817 91177308-0d34-0410-b5e6-96231b3b80d8

Fix rdar://6719156 - clang should emit a better error when blocks are disabled but are used anyway
by changing blocks from being disabled in the parser to being disabled
in Sema.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67816 91177308-0d34-0410-b5e6-96231b3b80d8

remove the updated notes.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67813 91177308-0d34-0410-b5e6-96231b3b80d8

- Fix thinko in implementation of PathDiagnosticLocation::asStmt(). Thanks to
  Anders Johnsen for pointing this out.
- Have PathDiagnosticControlFlowPiece take PathDiagnosticLocation for the
  arguments to its constructors.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67812 91177308-0d34-0410-b5e6-96231b3b80d8

Fix searching for gcc, we only want executable files.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67806 91177308-0d34-0410-b5e6-96231b3b80d8

Clarify that QualifiedNameType is sugar-only. This will matter once we can parse typename-specifiers

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67803 91177308-0d34-0410-b5e6-96231b3b80d8

Put back __OBJC2__ definition.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67802 91177308-0d34-0410-b5e6-96231b3b80d8

Simplify CXXScopeSpec a lot. No more weird SmallVector-like hacks here

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67800 91177308-0d34-0410-b5e6-96231b3b80d8

Revamp our representation of C++ nested-name-specifiers. We now have a
uniqued representation that should both save some memory and make it
far easier to properly build canonical types for types involving
dependent nested-name-specifiers, e.g., "typename T::Nested::type".

This approach will greatly simplify the representation of
CXXScopeSpec. That'll be next.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67799 91177308-0d34-0410-b5e6-96231b3b80d8

I said _fix_ the build, don't break it.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67797 91177308-0d34-0410-b5e6-96231b3b80d8

Fix build.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67796 91177308-0d34-0410-b5e6-96231b3b80d8