"obviously braindead" linear searches.  reduces the number of slow
type lookups from 10K to 883 on carbon.h, speeding up parsing from 3.5 to
1.26s.

llvm-svn: 39312

a foldingset instead.  This reduces the number of slow type lookups from
32K to 10K, which speeds up parsing of carbon.h from 11s to 3.5s.

llvm-svn: 39311

This speeds up parsing carbon.h from 16.0s to 11.3s, reducing slow
lookups from 63K to 32K.

llvm-svn: 39308

llvm-svn: 39307

ASTContext::getTagDeclType by not having to do a linear search.  With this,
parse time for carbon.h drops from 21.8s to 16.0s and # slow lookups drop from
83K to 63K.

llvm-svn: 39306

*** AST Context Stats:
  30594 types total.
    19 builtin types
    3929 pointer types
    308 array types
    18883 function types with proto
    8 function types with no proto
    2988 typename (typedef) types
    4459 tagged types
      1476 struct types
      80 union types
      0 class types
      2903 enum types
  83298 slow type lookups

Next up, making type canonicalization not trivially silly.

llvm-svn: 39305

converting a declspec with TST = struct/union.  Pretty print as well.

llvm-svn: 39284

Make name lookup properly obey C namespaces, simplify decl construction byeliminating the 'next' pointer from the ctor, and add initial support forparsing struct/union tags.

llvm-svn: 39266

instead of having a string.

llvm-svn: 39237

This lets us pretty print stuff like this:

void foo() {
  int X;
  X = sizeof(void (*(*)())());
  X = sizeof(int(*)(int, float, ...));
  X = sizeof(void (*(int arga, void (*argb)(double Y)))(void* Z));

as:

  X = sizeof(void (*(*)())())
  X = sizeof(int (*)(int, float, ...))
  X = sizeof(void (*(int, void (*)(double)))(void *))

Ah the wonders of 'modern' C syntax!

llvm-svn: 39232

allows us to handle stuff like:

typedef int G;
 ..
  X = sizeof(G);

llvm-svn: 39189

This allows us to handle:

int (*A)[restrict static 4][6];

for example.

llvm-svn: 39176

llvm-svn: 39175

Teach getPointerType to (stupidly) memoize all created pointers.
Give types an enum so we can implement classof.

llvm-svn: 39174

parse (and print) things like:

int* const* restrict* const volatile***

etc.

llvm-svn: 39173

llvm-svn: 39166

llvm-svn: 39164

llvm-svn: 39162

llvm-svn: 39048

llvm-svn: 38991

llvm-svn: 38935

llvm-svn: 38933

llvm-svn: 38784

llvm-svn: 38783

llvm-svn: 38658