Fix <rdar://problem/6191148> [sema] Objective-C method lookup (at global scope) fails to handle overloaded selectors properly.

Long standing bug in Sema::ActOnInstanceMessage(). We now warn when messaging an "id" with multiple method signatures in scope. The diags are a little verbose, however they can be streamlined if necessary. 

llvm-svn: 56843

Fix <rdar://problem/6252129> implementation of method in category doesn't effectively declare it for methods below.

llvm-svn: 56771

llvm-svn: 56642

 - readonly and readwrite are mutually exclusive.
 - assign, copy, and retain are mutually exclusive.
 - copy and retain are invalid on non-object types.
 - Warn about using default 'assign' property on object types
   (attempting to follow gcc behavior).

llvm-svn: 56507

llvm-svn: 56438

 ^(expression) or ^(int arg1, float arg2)(expression)
...is no longer supported. 
All block literals now require a compound statement.

llvm-svn: 56257

Give string literals const element typesin C++, and cope with the deprecated C++ conversion from a string literal to a pointer-to-non-const-character

llvm-svn: 56137

(1) Additional arguments to variadic methods should have default
promotions applied.

(2) Additional arguments to non-variadic methods were allowed.

llvm-svn: 56084

CheckMessageArgumentTypes.
 - No functionality change.

llvm-svn: 56079

Implement Sema support for the 'condition' part of C++ selection-statements and iteration-statements (if/switch/while/for).

llvm-svn: 56044

No functionality change.

llvm-svn: 56014

- Replace string comparisons with pre-defined idents.
- Avoid calling isBuiltinObjCType() to avoid two checks. 
- Remove isBuiltinObjCType(), since it was only used in Sema::MergeTypeDefDecl().
- Have Sema::MergeTypeDefDecl() set the new type.

This is a moidified version of an patch by David Chisnall.

llvm-svn: 55990

Change struct forward declarations and definitions to use unique RecordDecls, as opposed to creating a single RecordDecl and reusing it.

This change effects both RecordDecls and CXXRecordDecls, but does not effect EnumDecls (yet).

The motivation of this patch is as follows:
- Capture more source information, necessary for refactoring/rewriting clients.

- Pave the way to resolve ownership issues with RecordDecls with the forthcoming
  addition of DeclGroups.

Current caveats:
- Until DeclGroups are in place, we will leak RecordDecls not explicitly
  referenced by the AST.  For example:

    typedef struct { ... } x;  

  The RecordDecl for the struct will be leaked because the TypedefDecl doesn't
  refer to it.  This will be solved with DeclGroups.
  
- This patch also (temporarily) breaks CodeGen.  More below.

High-level changes:
- As before, TagType still refers to a TagDecl, but it doesn't own it.  When
  a struct/union/class is first referenced, a RecordType and RecordDecl are
  created for it, and the RecordType refers to that RecordDecl.  Later, if
  a new RecordDecl is created, the pointer to a RecordDecl in RecordType is
  updated to point to the RecordDecl that defines the struct/union/class.

- TagDecl and RecordDecl now how a method 'getDefinition()' to return the
  TagDecl*/RecordDecl* that refers to the TagDecl* that defines a particular
  enum/struct/class/union. This is useful from going from a RecordDecl* that
  defines a forward declaration to the RecordDecl* that provides the actual
  definition. Note that this also works for EnumDecls, except that in this case
  there is no distinction between forward declarations and definitions (yet).

- Clients should no longer assume that 'isDefinition()' returns true from a
  RecordDecl if the corresponding struct/union/class has been defined.
  isDefinition() only returns true if a particular RecordDecl is the defining
  Decl. Use 'getDefinition()' instead to determine if a struct has been defined.

- The main changes to Sema happen in ActOnTag. To make the changes more
  incremental, I split off the processing of enums and structs et al into two
  code paths. Enums use the original code path (which is in ActOnTag) and
  structs use the ActOnTagStruct. Eventually the two code paths will be merged,
  but the idea was to preserve the original logic both for comparison and not to
  change the logic for both enums and structs all at once.

- There is NO CHAINING of RecordDecls for the same RecordType. All RecordDecls
  that correspond to the same type simply have a pointer to that type. If we
  need to figure out what are all the RecordDecls for a given type we can build
  a backmap.

- The diff in CXXRecordDecl.[cpp,h] is actually very small; it just mimics the
  changes to RecordDecl. For some reason 'svn' marks the entire file as changed.

Why is CodeGen broken:
- Codegen assumes that there is an equivalence between RecordDecl* and
  RecordType*. This was true before because we only created one RecordDecl* for
  a given RecordType*, but it is no longer true. I believe this shouldn't be too
  hard to change, but the patch was big enough as it is.
  
I have tested this patch on both the clang test suite, and by running the static analyzer over Postgresql and a large Apple-internal project (mix of Objective-C and C).  

llvm-svn: 55839

which are inherited from base clases or protocols.

llvm-svn: 55790

llvm-svn: 55768

llvm-svn: 55767

 - Currently CodeGen always returns a conservative value for this (-1
   or 0 depending on the context).

llvm-svn: 55735

Highlights...

- 4 new AST nodes, BlockExpr, BlockStmtExpr, BlockExprExpr, BlockDeclRefExpr.
- Sema::ActOnBlockStart(), ActOnBlockError(), ActOnBlockStmtExpr(), ActOnBlockExprExpr(), ActOnBlockReturnStmt().

Next steps...

- hack Sema::ActOnIdentifierExpr() to deal with block decl refs.
- add attribute handler for byref decls.
- add test cases.

llvm-svn: 55710

 - Add ObjCMethodDecl::createImplicitParams.
 - Remove ObjCMethodDecl::set{Self,Cmd}Decl
 - Remove Sema::CreateImplicitParameter

No (intended) functionality change.

llvm-svn: 55356

llvm-svn: 55284

llvm-svn: 55222

llvm-svn: 55216

-The Parser calls a new "ActOnCXXTypeConstructExpr" action.
-Sema, depending on the type and expressions number:
   -If the type is a class, it will treat it as a class constructor. [TODO]
   -If there's only one expression (i.e. "int(0.5)" ), creates a new "CXXFunctionalCastExpr" Expr node
   -If there are no expressions (i.e "int()" ), creates a new "CXXZeroInitValueExpr" Expr node.

llvm-svn: 55177

 - UsualUnaryConversions takes an Expr *& and may modify its argument,
   this broke when it was refactored into Sema::CheckCastTypes. This
   meant that we were missing implicit casts in some places.
 - Seems pretty sad that this got through our tests.

llvm-svn: 55039

Move the type checking that Sema::ActOnCastExpr does into a new Sema::CheckCastTypes function so that it can be reused.

llvm-svn: 54852

 - Added as private members for each because it is not clear where to
   put the common definition. Perhaps the IdentifierInfos all of these
   "pseudo-keywords" should be collected into one place (this would
   KnownFunctionIDs and Objective-C property IDs, for example).

Remove Token::isNamedIdentifier.
 - There isn't a good reason to use strcmp when we have interned
   strings, and there isn't a good reason to encourage clients to do
   so.

llvm-svn: 54794

 - Drop {Decl.h,DeclObjC.h,IdentifierTable.h} from Expr.h
 - Moved Sema::getCurMethodDecl() out of line (dependent on
   ObjCMethodDecl via dyn_cast).

llvm-svn: 54629

 - Drop TokenKinds.h from Action.h
 - Move DeclSpec.h from Sema.h into individual Sema .cpp files

llvm-svn: 54625

Cleanup from yesterday...make isTentativeDefinition() a static helper function (no need for it to be part of the Sema API).

llvm-svn: 54613

llvm-svn: 54605

Passing right brace location to ActOnFinishCXXClassDef is redundant, since it gets passed to ActOnFinishCXXMemberSpecification too.

llvm-svn: 54567

- Move checking from MergeVarDecl->FinializeDeclaratorGroup. Since MergeVarDecl is called before the initializer is attacted, it can't be done there (this removes a long standing FIXME).
- Add Sema::isTentativeDefinition() and Sema::CheckForFileScopedRedefinitions().
- Remove FIXME's and touch-up test case.

Still some more work to do (forthcoming)...

llvm-svn: 54533

  ActOnDeclarator.

llvm-svn: 54353

 - ActOnDeclarator now takes an additional parameter which is the
   AsmLabel if used. Its unfortunate that this bubbles up this high,
   but we cannot just lump it in as an attribute without mistakenly
   *accepting* it as an attribute.
 - The actual asm-label itself is, however, encoded as an AsmLabelAttr
   on the FunctionDecl.
 - Slightly improved parser error recovery on malformed asm-labels.
 - CodeGen support still missing...

llvm-svn: 54339

No functionality change.

llvm-svn: 54265

last client of the old ParseObjCProtocolReferences, so it also removes it.

llvm-svn: 54094

llvm-svn: 54093

This temporarily duplicates ParseObjCProtocolReferences, but it
will be removed in the future.

llvm-svn: 54092

llvm-svn: 54091

llvm-svn: 54066