Yesterday, I simplified how we stream top-level decls.

After a discussion with Ted, we both came to the conclusion that adding a "HandleTopLevelDeclaration" hook to ASConsumer is far more elegant. The default implementation of HandleTopLevelDeclaration will be responsible for iterating over the ScopedDecl (which has a chain of the decls:-).

TODO: Once Ted adds HandleTopLevelDeclaration, make sure TagDecls are chainged appropriately...
llvm-svn: 44445

be the new hook that ASTStreamer calls to feed top-level Decls to
ASTConsumers.

The difference between "HandleTopLevelDeclaration" and "HandleTopLevelDecl" is
that "HandleTopLevelDecl" is currently called by ASTStreamer for every
top-level declaration, including those that appear within a Decl chain. Using
the new interface, ASTStreamer would only call HandleTopLevelDeclaration for
Decls that appear that the beginning of a Decl chain (i.e., a group of related
decls).

To preserve the behavior that all subclasses of ASTConsumer currently expect,
the default implementation of HandleTopLevelDeclaration simply calls
HandleTopLevelDecl, and for decl chains it calls HandleTopLevelDecl for each
Decl* in a chain of Decls.

The advantage of this interface is that some subclasses of ASTConsumer only
really want the Decl chain, and not each individual Decl passed to them. This
extra level of indirection allows subclasses to override the default behavior
if they so desire.

llvm-svn: 44444

llvm-svn: 44443

Update the initializer's type, in addition to the decl, if we've changed the type of the decl based on it.

llvm-svn: 44440

test suite.

llvm-svn: 44439

llvm-svn: 44438

llvm-svn: 44437

in the middle of a split basic block, create a new live interval starting at
the def. This avoid artifically extending the live interval over a number of
cycles where it is dead. e.g.

bb1:
       = vr1204   (use / kill) <= new interval starts and ends here.
...
...
vr1204 =          (new def)   <= start a new interval here.
       = vr1204   (use)

llvm-svn: 44436

llvm-svn: 44435

llvm-svn: 44434

llvm-svn: 44433

llvm-svn: 44432

Support floating point literals of the form "1e-16f" which specify an exponent but no decimal point.

llvm-svn: 44431

initialized with a value if they want, by specializing the 
StringMapEntryInitializer class.

llvm-svn: 44430

both before and after serialization/deserialization. If the CFGs between the pre-
and post- serialized/deserialized ASTs differ, the serialization has failed.

llvm-svn: 44429

llvm-svn: 44428

llvm-svn: 44427

Removed redundant test case.

llvm-svn: 44426

represented exactly and inexactly by APFloats. For the former, we do not emit a
warning.

llvm-svn: 44425

floating-point literals that are represented exactly by the APFloat in
FloatingLiteral. For such literals, we do not emit a warning since such checks are
often performed in real code to see if a variable has changed from its original
value. This heuristic clearly can lead to false negatives, but the hope is it will
significantly reduce false positives to help make the compiler flag more useful.

llvm-svn: 44424

the APFloat representing the parsed literal can represent the literal value
exactly.  This is useful when performing various semantic checks on the code,
and issuing appropriate warnings to users.

llvm-svn: 44423

converts a parsed literal into an APFloat. We are still performing a copy of the
string, which hopefully will be removed eventually for performance reasons. This
version now is at least safe.

Changed rounding in APFloat construction in NumericLiteralParser from rmTowardsZero
to rmNearestTiesToEven.

llvm-svn: 44422

Several fixes/simplifications surrounding how we stream top-level decl AST's.

The following code...

typedef struct cssm_data {} CSSM_DATA, *CSSM_DATA_PTR;

struct Y { int A; };

struct X { int A; } D; 

struct X E, F;

...now produces the following output...

> ../../Debug/bin/clang xx.c -ast-print
Read top-level tag decl: 'cssm_data'
typedef struct cssm_data CSSM_DATA;
typedef struct cssm_data *CSSM_DATA_PTR;
Read top-level tag decl: 'Y'
Read top-level tag decl: 'X'
Read top-level variable decl: 'D'
Read top-level variable decl: 'E'
Read top-level variable decl: 'F'

...which is much more accurate than the previous -ast-print output...

typedef struct cssm_data CSSM_DATA;
typedef struct cssm_data CSSM_DATA;
Read top-level variable decl: 'D'
Read top-level variable decl: 'E'
Read top-level variable decl: 'E'

llvm-svn: 44421

llvm-svn: 44418

a bug where the statement pretty-printer used iostreams but the AST printer
did not.  This was an issue when dumping ASTs to something other than stderr.

Updated SerializationTest to use the new iostreams interface for the AST printer.

llvm-svn: 44417

llvm-svn: 44416

  unsigned char *llvm_cbe_X;
...
  llvm_cbe_X = 0; *((void**)&llvm_cbe_X) = __builtin_stack_save();

instead of:

  llvm_cbe_X = __builtin_stack_save();

See PR1809 for details.

llvm-svn: 44415

llvm-svn: 44414

Introduced a few line breaks to make the Makefile easier to read.

llvm-svn: 44413

case simply performs --test-pickling on the code found in Sema/stmt_exprs.c.

llvm-svn: 44412

(1) Parsed ASTs are pretty-printed to a text file.
(2) The ASTs are serialized to disk.
(3) The ASTs are deserialized from disk.
(4) The deserialized ASTs are pretty-printed to a text file.
(5) The two pretty-printed files are compared. If they are different, the test
    fails.

llvm-svn: 44411

subdirectories mirroring where the test case file is located

For example, for the test case "Sema/stmt_exprs.c", instead of the files
"Output/stmt_exprs.c.out" and "Output/stmt_exprs.c.out.script" being created, the
files "Output/Sema/stmt_exprs.c.out" and "Output/Sema/stmt_exprs.c.out.script" are
created. This prevents any collisions from different test directories that have the
same file name for a test case, and also makes it clear where the test case was
drawn from.

llvm-svn: 44410

case testing the frontend's support of statement expressions was not being
executed.

llvm-svn: 44409

Bug pointed out by Michael Zolda, thanks!

llvm-svn: 44408

CodeGen/Generic/fp_to_int.ll among others.  Its unclear why this 
just started failing...

llvm-svn: 44407

llvm-svn: 44406

llvm-svn: 44405

llvm-svn: 44404

use them.

llvm-svn: 44403

local changes, not the "not".

llvm-svn: 44402