Dror GCCLibraries: they are obsolete since 2.0 release. This also reduces number of licenses used in LLVM.

llvm-svn: 41257

llvm-svn: 41256

llvm-svn: 41255

dispatch to walk the AST.

llvm-svn: 41254

llvm-svn: 41253

Added builder code to translate ASTs to CFGs.  This currently supports
if, return, and non-control flow statements.

Added pretty-printer to debug CFGs.

Added a "-dump-cfg" option to the clang driver to dump CFGs for code
sent through the frontend.

llvm-svn: 41252

Next step, method...

llvm-svn: 41251

llvm-svn: 41250

llvm-svn: 41249

CFG construction (among other potential uses).

llvm-svn: 41248

llvm-svn: 41247

llvm-svn: 41246

llvm-svn: 41245

llvm-svn: 41244

void foo() {
  int x
  if (x) {
  }
}

We now emit:

a.c:5:3: error: parse error
  if (x) {
  ^
1 diagnostic generated.

instead of:

a.c:5:3: error: parse error
  if (x) {
  ^
a.c:9:1: error: expected '}'

^
2 diagnostics generated.

llvm-svn: 41243

llvm-svn: 41242

llvm-svn: 41241

llvm-svn: 41240

llvm-svn: 41239

llvm-svn: 41238

llvm-svn: 41237

llvm-svn: 41236

llvm-svn: 41235

llvm-svn: 41234

llvm-svn: 41233

llvm-svn: 41232

llvm-svn: 41231

llvm-svn: 41230

llvm-svn: 41229

llvm-svn: 41228

llvm-svn: 41227

llvm-svn: 41226

llvm-svn: 41225

llvm-svn: 41224

Doxygenize comments.

llvm-svn: 41222

llvm-svn: 41219

llvm-svn: 41218

This means that we get rid of tons of intermediate allocas.  For
example:

void foo(double _Complex a, double _Complex b) {
   a = b+a+a;
}

this used to have 4 temporary allocas, now it has zero of them.
This also simplifies the individual visitor methods because they
now can all operate on real/imag pairs instead of having to 
load/store all over the place.

llvm-svn: 41217

llvm-svn: 41216

llvm-svn: 41215