the prerocessor will be available via ASTContext).
- Removed the public data member "PP" in ASTContext.
- Changed ASTContext's contructor to take TargetInfo/IdentifierTable explicitly.
- Implicitly create an ASTContext in Sema's constructor. This simplifies
the clients job (and makes ASTContext more private).
--As a side effect, added a "PrintStats" hook to Sema.

To support this level of encapsulation, ASTContext is always dynamically
allocated (by Sema). Previously, ASTContext was being allocated on the
stack. I don't believe this should be a performance issue (since ASTContext
is fairly course grain and tied to the lifetime of Sema currently).

llvm-svn: 39345

int A() {
  return X();
}

llvm-svn: 39194

llvm-svn: 39161

to SemaDecl.cpp

llvm-svn: 39159

llvm-svn: 39157

llvm-svn: 39156

llvm-svn: 39155

interface exported by libast.

llvm-svn: 39154

llvm-svn: 39153

fundamentally requires having an AST around, so move all sema to the
AST library.  This is the first step, later steps will be needed to
clean up libast.

llvm-svn: 39150

llvm-svn: 39121

llvm-svn: 39120

llvm-svn: 39119

llvm-svn: 39116

llvm-svn: 39113

and should be implemented with an ASTBuilder subclass anyway.

llvm-svn: 39107

llvm-svn: 39095

llvm-svn: 39075

llvm-svn: 39051

llvm-svn: 39050

llvm-svn: 39049

llvm-svn: 39048

llvm-svn: 39046

llvm-svn: 39045

llvm-svn: 39044

llvm-svn: 39043

llvm-svn: 38999

llvm-svn: 38993

declarations through the asm streamer.  For a testcase like:

int G;
int H, I, *J;
int func() {}

'clang -parse-print-ast' prints:

Read top-level decl: G
Read top-level decl: H
Read top-level decl: I
Read top-level decl: J
Read top-level decl: func

llvm-svn: 38992

llvm-svn: 38991

llvm-svn: 38965

llvm-svn: 38960

llvm-svn: 38951

llvm-svn: 38950

llvm-svn: 38949

llvm-svn: 38948

llvm-svn: 38947

llvm-svn: 38944

llvm-svn: 38943

llvm-svn: 38940