add a new AST dumper interface (E->dump()). This dumps out

the AST in a structural, non-pretty, form useful for understanding
the AST.  It isn't quite done yet, but is already somewhat useful.

For this example:

int test(short X, long long Y) {
  return X < ((100));
}

we get (with -parse-ast-dump):

int test(short X, long long Y)
(CompoundStmt 0x2905ce0
  (ReturnStmt 0x2905cd0
    (BinaryOperator 0x2905cb0 '<'
      (ImplicitCastExpr 0x2905ca0
        (DeclRefExpr 0x2905c20 Decl='X' 0x2905bb0))
      (ParenExpr 0x2905c80
        (ParenExpr 0x2905c60
          (IntegerLiteral 0x2905c40 100))))))




git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@40954 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 6 insertions, 0 deletions

diff --git a/Driver/clang.cpp b/Driver/clang.cpp
index 7d8a4590f1..2ee8a93a30 100644
--- a/Driver/clang.cpp
+++ b/Driver/clang.cpp
@@ -49,6 +49,7 @@ Stats("stats", llvm::cl::desc("Print performance metrics and statistics"));
 enum ProgActions {
   EmitLLVM,                     // Emit a .ll file.
   ParseASTPrint,                // Parse ASTs and print them.
+  ParseASTDump,                 // Parse ASTs and dump them.
   ParseASTCheck,                // Parse ASTs and check diagnostics.
   ParseAST,                     // Parse ASTs.
   ParsePrintCallbacks,          // Parse and print each callback.
@@ -79,6 +80,8 @@ ProgAction(llvm::cl::desc("Choose output type:"), llvm::cl::ZeroOrMore,
                         "Run parser and build ASTs"),
              clEnumValN(ParseASTPrint, "parse-ast-print",
                         "Run parser, build ASTs, then print ASTs"),
+             clEnumValN(ParseASTDump, "parse-ast-dump",
+                        "Run parser, build ASTs, then dump them"),
              clEnumValN(ParseASTCheck, "parse-ast-check",
                         "Run parser, build ASTs, then check diagnostics"),
              clEnumValN(EmitLLVM, "emit-llvm",
@@ -819,6 +822,9 @@ static void ProcessInputFile(Preprocessor &PP, unsigned MainFileID,
   case ParseASTPrint:
     PrintASTs(PP, MainFileID, Stats);
     break;
+  case ParseASTDump:
+    DumpASTs(PP, MainFileID, Stats);
+    break;
   case EmitLLVM:
     EmitLLVMFromASTs(PP, MainFileID, Stats);
     break;