Add preliminary clang attribute generation support.

The attribute class generation support is still somewhat limited.
See the accompanying clang commit for more details.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106174 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 85 insertions, 0 deletions

diff --git a/utils/TableGen/ClangAttrEmitter.cpp b/utils/TableGen/ClangAttrEmitter.cpp
new file mode 100644
index 0000000..95bc1a5
--- /dev/null
+++ b/utils/TableGen/ClangAttrEmitter.cpp
@@ -0,0 +1,85 @@
+//===- ClangAttrEmitter.cpp - Generate Clang attribute handling =-*- C++ -*--=//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// These tablegen backends emit Clang attribute processing code
+//
+//===----------------------------------------------------------------------===//
+
+#include "ClangAttrEmitter.h"
+#include "Record.h"
+#include <algorithm>
+
+using namespace llvm;
+
+void ClangAttrClassEmitter::run(raw_ostream &OS) {
+  OS << "// This file is generated by TableGen. Do not edit.\n\n";
+  OS << "#ifndef LLVM_CLANG_ATTR_CLASSES_INC\n";
+  OS << "#define LLVM_CLANG_ATTR_CLASSES_INC\n\n";
+
+  std::vector<Record*> Attrs = Records.getAllDerivedDefinitions("Attr");
+
+  for (std::vector<Record*>::iterator i = Attrs.begin(), e = Attrs.end();
+       i != e; ++i) {
+    Record &R = **i;
+
+    if (R.getValueAsBit("DoNotEmit"))
+      continue;
+
+    OS << "class " << R.getName() << "Attr : public Attr {\n";
+
+    std::vector<Record*> Args = R.getValueAsListOfDefs("Args");
+    std::vector<Record*>::iterator ai, ae = Args.end();
+
+    // FIXME: Handle arguments
+    assert(Args.empty() && "Can't yet handle arguments");
+
+    OS << "\n public:\n";
+    OS << "  " << R.getName() << "Attr(";
+    
+    // Arguments go here
+    
+    OS << ")\n";
+    OS << "    : Attr(attr::" << R.getName() << ")";
+
+    // Arguments go here
+    
+    OS << " {}\n\n";
+
+    OS << "  virtual Attr *clone (ASTContext &C) const;\n";
+    OS << "  static bool classof(const Attr *A) { return A->getKind() == "
+       << "attr::" << R.getName() << "; }\n";
+    OS << "  static bool classof(const " << R.getName()
+       << "Attr *) { return true; }\n";
+    OS << "};\n\n";
+  }
+
+  OS << "#endif\n";
+}
+
+void ClangAttrListEmitter::run(raw_ostream &OS) {
+  OS << "// This file is generated by TableGen. Do not edit.\n\n";
+
+  OS << "#ifndef LAST_ATTR\n";
+  OS << "#define LAST_ATTR(NAME) ATTR(NAME)\n";
+  OS << "#endif\n\n";
+   
+  std::vector<Record*> Attrs = Records.getAllDerivedDefinitions("Attr");
+  std::vector<Record*>::iterator i = Attrs.begin(), e = Attrs.end();
+
+  if (i != e) {
+    // Move the end iterator back to emit the last attribute.
+    for(--e; i != e; ++i)
+      OS << "ATTR(" << (*i)->getName() << ")\n";
+    
+    OS << "LAST_ATTR(" << (*i)->getName() << ")\n\n";
+  }
+
+  OS << "#undef LAST_ATTR\n";
+  OS << "#undef ATTR\n";
+}