Fix two rewriter bugs:

- For @class, don't generate multiple typedefs.
- Handle the following edge case interface...

@interface NSMiddleSpecifier : NSObject {}

@end

...which was incorrectly being rewritten to...

struct _interface_NSMiddleSpecifier {
        struct _interface_NSObject _NSObject;
};
{}

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43582 91177308-0d34-0410-b5e6-96231b3b80d8

Handle function calls that return aggregate expressions.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43581 91177308-0d34-0410-b5e6-96231b3b80d8

More infrastructure to recognize objective-c's type qualifiers (in,inout, etc.)

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43580 91177308-0d34-0410-b5e6-96231b3b80d8

New test to verify llvm struct layout.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43577 91177308-0d34-0410-b5e6-96231b3b80d8

Check whether next slot meets field type's alignment requirements.
If it does not then assert at the moment.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43576 91177308-0d34-0410-b5e6-96231b3b80d8

Implement ObjC built-in types in MinimalAction.

This fixes the recent regression with selector-1.m and -parse-noop.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43575 91177308-0d34-0410-b5e6-96231b3b80d8

Implemented short-circuited version of Builtin::Info::operator!=.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43574 91177308-0d34-0410-b5e6-96231b3b80d8

Keep track of field offsets during structure layout.
Take 2.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43573 91177308-0d34-0410-b5e6-96231b3b80d8

Take 2.

Make target info available to clang code generator.  This is far from complete but this helps clang codegen module make progress.

At the moment target triplet and target description strings are hard coded in clang::TargetInfo

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43572 91177308-0d34-0410-b5e6-96231b3b80d8

Adjusted QualType deserialization to reflect updated deserialization API.

We now serialize ivar references inside of ASTContext.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43571 91177308-0d34-0410-b5e6-96231b3b80d8

Initialize MemCpyFn

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43569 91177308-0d34-0410-b5e6-96231b3b80d8

Fixed problem with rewriting stand-alone @implementation (with no matching @interface).
A new test case added.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43568 91177308-0d34-0410-b5e6-96231b3b80d8

Implement a more sensible strategy for ObjC built-in types (addressing a long standing FIXME in Sema::GetObjcIdType()).

This removes several gross hacks to work around the previous "lazy" behavior.

Two notes:
- MinimalActions still needs to be taught about the built-in types (This breaks one of the -noop test cases). I started this, then added a FIXME.
- I didn't convert Sema::GetObjcProtoType() yet.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43567 91177308-0d34-0410-b5e6-96231b3b80d8

Preliminary support for serializing statements.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43566 91177308-0d34-0410-b5e6-96231b3b80d8

Updated path to clang.cpp in build documentation.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43564 91177308-0d34-0410-b5e6-96231b3b80d8

Updated build instructions to not include an absolute line number in clang.cpp to add hard-coded paths.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43563 91177308-0d34-0410-b5e6-96231b3b80d8

Updated a comment to hopefully silence a Lattner warning.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43562 91177308-0d34-0410-b5e6-96231b3b80d8

Implemented serialization of Variable Array Types (VLAs).

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43561 91177308-0d34-0410-b5e6-96231b3b80d8

Rewriteing of ivars changed to just copy directly from the source.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43560 91177308-0d34-0410-b5e6-96231b3b80d8

Renamed ivar "ArrayTypes" in ASTContext to "ComplexArrayTypes".

Added skeleton code for serialization of ASTContext.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43558 91177308-0d34-0410-b5e6-96231b3b80d8

Checking in some code that is still under construction.

I need to (finally) change the way Class/id/SEL/IMP are built-in...the current approach of doing it in the preprocessor is "broken". The other problem is Sema::GetObjcIdType/GetObjcSelType/GetObjcClassType, the hooks that initialize ASTContext lazily. These built-in types need to be done up front...

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43557 91177308-0d34-0410-b5e6-96231b3b80d8

After Anders check-in, we can now encode 'Class' type.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43556 91177308-0d34-0410-b5e6-96231b3b80d8

Added a few clarifying steps the the "building clang" section.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43555 91177308-0d34-0410-b5e6-96231b3b80d8

temporarily revert devang's patch to link in the llvm codegen etc.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43544 91177308-0d34-0410-b5e6-96231b3b80d8

Add some plumbing to help cope with rewriting "id<p>", "Class<p>*".

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43543 91177308-0d34-0410-b5e6-96231b3b80d8

Encode Class, SEL and Objective-C objects.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43540 91177308-0d34-0410-b5e6-96231b3b80d8

Keep track of field offsets during structure layout.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43539 91177308-0d34-0410-b5e6-96231b3b80d8

Make target info available to clang code generator.
This is far from complete but this helps clang codegen module
make progress.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43536 91177308-0d34-0410-b5e6-96231b3b80d8

Added new type and bitfield fields in some decl types in preparation for objective-c's type qualifiers.
Added initialization of Class/SEMA types.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43534 91177308-0d34-0410-b5e6-96231b3b80d8

Avoid unnecessary PATypeHolder copy.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43530 91177308-0d34-0410-b5e6-96231b3b80d8

Stop pre-defining objc_msgSend/objc_getClass in the preprocessor. Instead, I generate these declaration on the fly when rewriting a message expression.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43529 91177308-0d34-0410-b5e6-96231b3b80d8

Updated some comments.
Disabled assignments for ContentCache.
Copy-ctor for ContentCache now has an assertion preventing it to
be copied from an object that already has an allocated buffer.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43526 91177308-0d34-0410-b5e6-96231b3b80d8

__real__ and __imag__ can be lvalues.  Add support to ast and codegen for them.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43525 91177308-0d34-0410-b5e6-96231b3b80d8

Refactored CFG construction code that processes DeclStmts to use StmtIterator.
Now CFG construction transparently supports Variable Length Array declarations
with expressions for their sizes, and typedefs that include VLAs.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43520 91177308-0d34-0410-b5e6-96231b3b80d8

Refactor code into a separate method.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43519 91177308-0d34-0410-b5e6-96231b3b80d8

Removed SrcMgr::FileInfo and SrcMgr::InfoRec and replaced them with a
single class: ContentCache.  This simplifies the logic in
SourceManager and makes the ownership of MemoryBuffers clearer.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43518 91177308-0d34-0410-b5e6-96231b3b80d8

Tightened IgnoreParen.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43517 91177308-0d34-0410-b5e6-96231b3b80d8

Fix 80 col violations.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43516 91177308-0d34-0410-b5e6-96231b3b80d8

minor tweaks

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43515 91177308-0d34-0410-b5e6-96231b3b80d8

Use
+  llvm::DenseMap<Type *, llvm::PATypeHolder> TypeHolderMap;
instead of
-  llvm::DenseMap<Type *, llvm::PATypeHolder *> TypeHolderMap;

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43514 91177308-0d34-0410-b5e6-96231b3b80d8

Fixed tests.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43513 91177308-0d34-0410-b5e6-96231b3b80d8

minor code cleanup

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43512 91177308-0d34-0410-b5e6-96231b3b80d8

shrinkify storage class to a bitfield, add a fixme about merging it in the future.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43509 91177308-0d34-0410-b5e6-96231b3b80d8

Remove commented out line.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43508 91177308-0d34-0410-b5e6-96231b3b80d8

Revisited my last patch to be able to do encoding of ivar types with 'id'.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43507 91177308-0d34-0410-b5e6-96231b3b80d8

update some comments.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43506 91177308-0d34-0410-b5e6-96231b3b80d8

Avoid using macro expansions, which causes these to come out in -E mode.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43505 91177308-0d34-0410-b5e6-96231b3b80d8

Added type encoding for 'id' type.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43504 91177308-0d34-0410-b5e6-96231b3b80d8

Rewrite protocols.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43503 91177308-0d34-0410-b5e6-96231b3b80d8

Added vector to ASTContext to store references to "complete" VLA types
(VLAs with a specified size expresssion).  This vector owns the
references to these type objects.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43502 91177308-0d34-0410-b5e6-96231b3b80d8

- Add location info to category/protocol AST's
- Rewrite categories.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43501 91177308-0d34-0410-b5e6-96231b3b80d8

Remove a couple FIXME's for rewriting ObjC interfaces (which are now being rewritten properly).

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43494 91177308-0d34-0410-b5e6-96231b3b80d8

More support for rewriting ObjC intefaces. Still some edge cases to handle...

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43493 91177308-0d34-0410-b5e6-96231b3b80d8

Handle function types.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43485 91177308-0d34-0410-b5e6-96231b3b80d8

Assert if isObjcIdType is called before 'id' type is built.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43484 91177308-0d34-0410-b5e6-96231b3b80d8

VariableArrayTypes (VLAs) without a size expression are now uniqued
and inserted into a FoldingSet owned by ASTContext.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43482 91177308-0d34-0410-b5e6-96231b3b80d8

Encoding for objectiive-c methods.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43481 91177308-0d34-0410-b5e6-96231b3b80d8

Updated VC++ build system

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43478 91177308-0d34-0410-b5e6-96231b3b80d8

Added a missing #include.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43477 91177308-0d34-0410-b5e6-96231b3b80d8

Remove a bunch of TODO's that have been done for quite some time...

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43476 91177308-0d34-0410-b5e6-96231b3b80d8

This commit contains lot's of small tweaks to how we pass around and store SourceLocation's for interfaces/protocols/categories/implementations.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43475 91177308-0d34-0410-b5e6-96231b3b80d8

Added support for StmtIterators to iterate over the size expressions
of VariableArrayTypes that appear in TypedefDecls.

for example:

  typedef int T[x][x];

the StmtIterator will iterate over "x" and "x" as subexpressions of
the DeclStmt for T.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43474 91177308-0d34-0410-b5e6-96231b3b80d8

Fixed deadcode bug where check for NULL decl occured within a block
where the decl would always be non-NULL.  Moved the check to after the
block to properly tidy up the iterator's state.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43473 91177308-0d34-0410-b5e6-96231b3b80d8

Add RecordOrganizer::layoutUnionFields()

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43472 91177308-0d34-0410-b5e6-96231b3b80d8

Modified StmtIterator to support iteration over the size expressions
of VariableTypeArray types that appear in DeclStmts.

Removed operator-- from StmtIterator.  operator-- added undesired
complexity, and we have no consumers of it.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43471 91177308-0d34-0410-b5e6-96231b3b80d8

Modified CFG pretty-printing to directly use the (reverse) body
iterator of a CompountStmt instead of relying on StmtIterators.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43469 91177308-0d34-0410-b5e6-96231b3b80d8

Renamed internal variables of StmtIteratorBase to make the code
slightly more succinct.

Introduced VariableArrayType* within StmtIteratorBase to (soon)
support iteration over the size expressions of variable length arrays.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43455 91177308-0d34-0410-b5e6-96231b3b80d8

Do the encoding of ivar types in the ivar metadata.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43454 91177308-0d34-0410-b5e6-96231b3b80d8

Added some comments.

Moved a dependent predicate in an if statement to be an assertion
within the if statement body.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43453 91177308-0d34-0410-b5e6-96231b3b80d8

Added to test case for "self-comparison check" uses of relation operators: x < x and x > x
should emit warnings.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43451 91177308-0d34-0410-b5e6-96231b3b80d8

For non-floating point types, added check for expressions of the form
"x == x" and "x != x".  We emit a warning for these since they always evaluate
to a constant value and often indicate a logical error.

Added test case for this check.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43450 91177308-0d34-0410-b5e6-96231b3b80d8

Insetead of assert() just emit an error message for
an unimplemented work  and continue.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43449 91177308-0d34-0410-b5e6-96231b3b80d8

For floating point equality check, we now ignore parentheses.  e.g.:
(x) == x  is the treated the same as x == x.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43448 91177308-0d34-0410-b5e6-96231b3b80d8

For checking for floating point comparison using == or !=, we now suppress
errors for cases such as "x == x".

Added test case to test this feature.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43447 91177308-0d34-0410-b5e6-96231b3b80d8

Address Chris's comments.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43445 91177308-0d34-0410-b5e6-96231b3b80d8

Fix logic error.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43443 91177308-0d34-0410-b5e6-96231b3b80d8

when checking for type equality, ignore typedefs.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43441 91177308-0d34-0410-b5e6-96231b3b80d8

improve error recovery handling broken 'then' or 'else' stmts in
if statements.  This implements Sema/if-empty-body.c:f3, silencing
a bogus secondary warning.  It also improve the location info for
the nullstmts created for recovery purposes.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43440 91177308-0d34-0410-b5e6-96231b3b80d8

Add (partial) support for @encode.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43439 91177308-0d34-0410-b5e6-96231b3b80d8

The callers of ParseStructDeclaration are not expecting it to
eat the terminating ;.  Fix one place where it did, allowing this
to compile without error:

struct x {
 int a;
 union {
  int b;
  float c;
 };

 int d;
};

This reduces diagnostics on PR1750 from 33 to 27.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43437 91177308-0d34-0410-b5e6-96231b3b80d8

casting to void is ok for structs (C99 6.5.4p2), this fixes
one bogus error on PR1750.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43436 91177308-0d34-0410-b5e6-96231b3b80d8

Add prototype info for __builtin_memcpy, reducing #diagnostics from 37 to 34 on
PR1750

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43435 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a parser bug on labeled inline asm stmts, allowing us
to parse stuff like:

asm volatile("1:  rex64/fxrstor (%[fx])\n\t"
       "2:\n"
       ".section .fixup,\"ax\"\n"
       "3:  movl $-1,%[err]\n"
       "    jmp  2b\n"
       ".previous\n"
       ".section __ex_table,\"a\"\n"
       "   .align 8\n"
       "   .quad  1b,3b\n"
       ".previous"
       : [err] "=r" (err)
       : [fx] "cdaSDb" (fx), "m" (*fx), "0" (0));

This reduces # diagnostics on PR1750 from 49 to 37.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43434 91177308-0d34-0410-b5e6-96231b3b80d8

Implement *skeletal* support for representing GNU inline asm stmts in the AST,
resolving a crash on a .i file in PR1750.  We now generate 49 errors on the
.i file in that bug.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43433 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a major bug in the Type::getAs*Type methods: they didn't strip off
typeof(type) and typeof(expr) correctly.  Now provide a single point of
contact (Type::getDesugaredType) for doing the shallow stripping we need.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43432 91177308-0d34-0410-b5e6-96231b3b80d8

Generate code for __builtin_classify_type.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43429 91177308-0d34-0410-b5e6-96231b3b80d8

Add BuiltinType::Char_S to Type::isCharType

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43428 91177308-0d34-0410-b5e6-96231b3b80d8

Implemented serialization for TypedefType.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43423 91177308-0d34-0410-b5e6-96231b3b80d8

Implemented serialization of FunctionTypeProto.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43419 91177308-0d34-0410-b5e6-96231b3b80d8

Implemented serialization of FunctionTypeNoProto.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43418 91177308-0d34-0410-b5e6-96231b3b80d8

Implemented serialization for VectorType.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43417 91177308-0d34-0410-b5e6-96231b3b80d8

More work on type serialization: added support for serializing BuiltinTypes.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43414 91177308-0d34-0410-b5e6-96231b3b80d8

Path to synthesize 'instance' size field of _objc_class metadata.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43409 91177308-0d34-0410-b5e6-96231b3b80d8

Completed serialization of ConstantArrayTypes (now that APInt serialization is in place).

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43407 91177308-0d34-0410-b5e6-96231b3b80d8

Start rewriting ObjC interfaces. As a start, we comment out all the methods. This involved refining how the parser/AST passes/manages SourceLocations for ObjcMethodDecl's.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43404 91177308-0d34-0410-b5e6-96231b3b80d8

This patch allows synthesis generation of ivar offset for legacy objective-c @implementation
decl without an @interface decl.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43403 91177308-0d34-0410-b5e6-96231b3b80d8

Added skeleton implementation of serialization for types (not complete).

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43397 91177308-0d34-0410-b5e6-96231b3b80d8

Patch to synthesize computation of Ivar offset in rewritten c file.
Thanks to Steve N. to point out using of offsetof for this.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43391 91177308-0d34-0410-b5e6-96231b3b80d8

Codegen union member references.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43390 91177308-0d34-0410-b5e6-96231b3b80d8

Handle non LValue base expressions.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43387 91177308-0d34-0410-b5e6-96231b3b80d8