llvm-svn: 70286

add "Looping back to the head of the loop" diagnostic for loops.

llvm-svn: 70285

llvm-svn: 70284

llvm-svn: 70283

llvm-svn: 70282

scheme to be more useful.

The new scheme introduces a set of categories that should be more 
readable, and also reflects what we want to consider as an extension 
more accurately.  Specifically, it makes the "what is a keyword" 
determination accurately reflect whether the keyword is a GNU or 
Microsoft extension.

I also introduced separate flags for keyword aliases; this is useful 
because the classification of the aliases is mostly unrelated to the 
classification of the original keyword.

This patch treats anything that's in the implementation 
namespace (prefixed with "__", or "_X" where "X" is any upper-case 
letter) as a keyword without marking it as an extension.  This is 
consistent with the standards in that an implementation is allowed to define 
arbitrary extensions in the implementation namespace without violating 
the standard. This gets rid of all the nasty "extension used" warnings 
for stuff like __attribute__ in -pedantic mode.  We still warn for 
extensions outside of the the implementation namespace, like typeof.
If someone wants to implement -Wextensions or something like that, we 
could add additional information to the keyword table.

This also removes processing for the unused "Boolean" language option; 
such an extension isn't supported on any other C implementation, so I 
don't see any point to adding it.

The changes to test/CodeGen/inline.c are required because previously, we 
weren't actually disabling the "inline" keyword in -std=c89 mode.

I'll remove Boolean and NoExtensions from LangOptions in a follow-up 
commit.

llvm-svn: 70281

llvm-svn: 70280

llvm-svn: 70277

- Add 'LoopTarget' pointer field to CFGBlock. This records if the block is used
  as the 'loop back' path back to the head of a loop.
- For ForStmt, encode the loop back target as the increment code.

llvm-svn: 70274

that if we're going to print an extension warning anyway, 
there's no point to changing behavior based on NoExtensions: it will 
only make error recovery worse.

Note that this doesn't cause any behavior change because NoExtensions 
isn't used by the current front-end.  I'm still considering what to do about
the remaining use of NoExtensions in IdentifierTable.cpp.

llvm-svn: 70273

builds to work (PR4088).

llvm-svn: 70269

llvm-svn: 70266

Clang version value rather than hard-coding "1.0".

Add PCH and Clang version information into the PCH file. Reject PCH
files with the wrong version information.

llvm-svn: 70264

llvm-svn: 70263

llvm-svn: 70259

processing to after PCH is loaded.  -Eonly and -parse-noop are close to working
with PCH now but are not quite there yet.

llvm-svn: 70257

llvm-svn: 70256

ignore a PCH file.

llvm-svn: 70251

llvm-svn: 70248

Improve validation of C++ exception handling: diagnose throwing incomplete types and jumps into protected try-catch scopes.

llvm-svn: 70242

Add Sema::ExtVectorDecls and Sema::ObjCCategoryImpls to the PCH file. Since these vectors are very, very rarely used and, when used in headers, and even when used are relatively small, we load them eagerly.

llvm-svn: 70240

'objc_ownership_cfrelease'. These are the 'release' equivalents of
'objc_ownership_retain' and 'objc_ownership_cfretain' respectively.

llvm-svn: 70235

treated as "not owned" objects.

llvm-svn: 70232

llvm-svn: 70229

entries, shaving 100K off the PCH file for cocoa.

llvm-svn: 70228

HandleObjCOwnershipParmAttr. No functionality change (hopefully).

llvm-svn: 70224

essentially the same thing we do with pretokenized headers. stat()
caching improves performance of the Cocoa-prefixed "Hello, World" by
45%.

llvm-svn: 70223

member.

Also, spell bitfield more consistently as bit-field.

llvm-svn: 70220

as 'objc_ownership_cfretain' except that the method acts like a CFRetain instead
of a [... retain] (important in GC modes). Checker support is wired up, but
currently only for Objective-C message expressions (not function calls).

llvm-svn: 70218

of 64 bits.  This cuts 400KB off the PCH file for cocoa (7.1 -> 
6.7MB):

Before:

	Record Histogram:
		  Count    # Bits   % Abv  Record Kind
		      1     14296          SOURCE_LOCATION_PRELOADS
		      1   1699598  100.00  SOURCE_LOCATION_OFFSETS
		      1   1870766  100.00  METHOD_POOL
		      1    212988  100.00  SELECTOR_OFFSETS
		      1        88          STATISTICS
		      1       106          SPECIAL_TYPES
		      1  18033788  100.00  IDENTIFIER_TABLE
		      1   1806428  100.00  IDENTIFIER_OFFSET
		      1       170  100.00  TARGET_TRIPLE
		      1       268          LANGUAGE_OPTIONS
		      1   5168252  100.00  DECL_OFFSET
		      1    952700  100.00  TYPE_OFFSET

After:

	Record Histogram:
		  Count    # Bits   % Abv  Record Kind
		      1     14296          SOURCE_LOCATION_PRELOADS
		      1   1699598  100.00  SOURCE_LOCATION_OFFSETS
		      1   1870766  100.00  METHOD_POOL
		      1    212988  100.00  SELECTOR_OFFSETS
		      1        88          STATISTICS
		      1       106          SPECIAL_TYPES
		      1  18033788  100.00  IDENTIFIER_TABLE
		      1   1806428  100.00  IDENTIFIER_OFFSET
		      1       170  100.00  TARGET_TRIPLE
		      1       268          LANGUAGE_OPTIONS
		      1   2584156  100.00  DECL_OFFSET
		      1    476380  100.00  TYPE_OFFSET

llvm-svn: 70216

parm var decls in leopard cocoa.h end up using this abbreviation,
which shrinks the bitcode file by about 50K: 7217736->7167120.

Before:
  Block ID #12 (DECLS_BLOCK):
      Num Instances: 1
         Total Size: 2.23595e+07b/2.79494e+06B/698736W
          % of file: 38.7233
      Num SubBlocks: 0
        Num Abbrevs: 0
        Num Records: 139387
      % Abbrev Recs: 0

After:
  Block ID #12 (DECLS_BLOCK):
      Num Instances: 1
         Total Size: 2.02405e+07b/2.53006e+06B/632516W
          % of file: 35.301
      Num SubBlocks: 0
        Num Abbrevs: 1
        Num Records: 139387
      % Abbrev Recs: 19.2902

llvm-svn: 70199

of the normal stream cursor.

llvm-svn: 70198

file. In particular, only eagerly load source location entries for
files and for the predefines buffer. Other buffers and
macro-instantiation source location entries are loaded lazily.

With the Cocoa-prefixed "Hello, World", we only load 815/26555 source
location entities. This halves the amount of user time we spend in
this "Hello, World" program with -fsyntax-only (down to .007s).

This optimization is part 1 of 2 for the source manager. This
eliminates most of the user time in loading a PCH file. We still spend
too much time initialize File structures (especially in the calls to
stat), so we need to either make the loading of source location
entries for files lazy or import the stat cache from the PTH
implementation.

llvm-svn: 70196

llvm-svn: 70194

llvm-svn: 70193

llvm-svn: 70192

extraneous braces.

llvm-svn: 70191

from the DeclsCursor.

llvm-svn: 70190

is part of a decl.

llvm-svn: 70189

llvm-svn: 70188