token was not -> and if the token before it was -, the - and > would avoid pasting.

llvm-svn: 40409

C++ mode, even gnu C++ mode.

llvm-svn: 40408

a llvm::StringMap.  This dramatically reduces the startup time of the preprocessor,
speeding up -Eonly on xalankbmk by 2.2%.

llvm-svn: 40396

memorybuffer instead of a pointer to the memorybuffer itself.  This
reduces coupling and eliminates a pointer dereference on a hot path.
This speeds up -Eonly on 483.xalancbmk by 2.1%

llvm-svn: 40394

compiler inline it.  This speeds up -Eonly on 483.xalancbmk by about 1%

llvm-svn: 40393

preprocessing 483.xalancbmk by about 10%, reducing the number
of file lookup queries from 2139411 to 199466 (over 10x)

llvm-svn: 40390

llvm-svn: 40388

llvm-svn: 40386

llvm-svn: 40385

   // foo
   // bar
   // baz

we'd get two levels of call (bcpl & whitespace) for each line, leading to some
seriously deep stacks in some cases.

llvm-svn: 40384

fileid's and macroid's across files.  Clearing between files keeps the tables
smaller and slightly speeds up compilation.

llvm-svn: 40383

llvm-svn: 40381

redefinition of a macro could cause invalid memory to be deleted.
Found preprocessing 253.perlbmk.

llvm-svn: 40380

int i = /*/ */ 1;

Thanks to Neil for pointing this out.

llvm-svn: 40379

llvm-svn: 40375

keeps the MacroInfo table more compact.

llvm-svn: 40281

llvm-svn: 40264

llvm-svn: 40189

llvm-svn: 40176

llvm-svn: 40173

llvm-svn: 40169

llvm-svn: 40163

llvm-svn: 40162

invalid arguments.

llvm-svn: 40161

llvm-svn: 40139

llvm-svn: 40138

a bit nicer for people who pass lots of extra arguments to calls by 
selecting them all instead of just the first one:

arg-duplicate.c:13:13: error: too many arguments to function
  f3 (1, 1, 2, 3, 4);   // expected-error {{too many arguments to function}}
            ^~~~~~~

This implements test/Sema/arg-duplicate.c, thanks to Neil for pointing
out this crash.

llvm-svn: 40136

llvm-svn: 40135

1) fix a crash on test/Sema/default.c by making
   sure that the switch scope is non-null.
2) if there is an error sema'ing a default or case stmt,
   make sure to return the substmt up, so that the error
   recovery code has more acurate info to continue with.

llvm-svn: 40134

llvm-svn: 40113

llvm-svn: 40111

llvm-svn: 40110

SourceManager::getInstantiationLoc.  With this change, every token
expanded from a macro doesn't get its own MacroID.  :)

This reduces # macro IDs in carbon.h from 16805 to 9197

llvm-svn: 40108

llvm-svn: 40106

Since that point is now long gone, we should rename LexerToken to
Token, as it is the only kind of token we have.

llvm-svn: 40105

llvm-svn: 40104

fileid/offset pair, it now contains a bit discriminating between
mapped locations and file locations.  This separates the tables for
macros and files in SourceManager, and allows better separation of
concepts in the rest of the compiler.  This allows us to have *many*
macro instantiations before running out of 'addressing space'.

This is also more efficient, because testing whether something is a
macro expansion is now a bit test instead of a table lookup (which
also used to require having a srcmgr around, now it doesn't).

This is fully functional, but there are several refinements and
optimizations left.

llvm-svn: 40103

llvm-svn: 40068

We still need to do sematic analysis (and implement initializers), however this 
should complete the parsing & ast building for compound literals.

llvm-svn: 40067

#define t(x) #x
t(a
c)

to "a c", not "ac".

llvm-svn: 40060