[llvm-commits] [llvm] r83160 - /llvm/trunk/lib/VMCore/AsmWriter.cpp

[Devang Patel]

Author: dpatel
Date: Wed Sep 30 15:16:54 2009
New Revision: 83160

URL: http://llvm.org/viewvc/llvm-project?rev=83160&view=rev
Log:
Print tag name for MDNodes that are used to encode debug info. 

Modified:
    llvm/trunk/lib/VMCore/AsmWriter.cpp

Modified: llvm/trunk/lib/VMCore/AsmWriter.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/VMCore/AsmWriter.cpp?rev=83160&r1=83159&r2=83160&view=diff

==============================================================================
--- llvm/trunk/lib/VMCore/AsmWriter.cpp (original)
+++ llvm/trunk/lib/VMCore/AsmWriter.cpp Wed Sep 30 15:16:54 2009
@@ -32,6 +32,7 @@
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/Support/CFG.h"
+#include "llvm/Support/Dwarf.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/MathExtras.h"
 #include "llvm/Support/FormattedStream.h"
@@ -869,6 +870,30 @@
   return pred;
 }
 
+static void WriteMDNodeComment(const MDNode *Node,
+			       formatted_raw_ostream &Out) {
+  if (Node->getNumElements() < 1)
+    return;
+  ConstantInt *CI = dyn_cast<ConstantInt>(Node->getElement(0));
+  if (!CI) return;
+  unsigned Val = CI->getZExtValue();
+  unsigned Tag = Val & ~LLVMDebugVersionMask;
+  if (Val >= LLVMDebugVersion) {
+    if (Tag == dwarf::DW_TAG_auto_variable)
+      Out << "; [ DW_TAG_auto_variable ]";
+    else if (Tag == dwarf::DW_TAG_arg_variable)
+      Out << "; [ DW_TAG_arg_variable ]";
+    else if (Tag == dwarf::DW_TAG_return_variable)
+      Out << "; [ DW_TAG_return_variable ]";
+    else if (Tag == dwarf::DW_TAG_vector_type)
+      Out << "; [ DW_TAG_vector_type ]";
+    else if (Tag == dwarf::DW_TAG_user_base)
+      Out << "; [ DW_TAG_user_base ]";
+    else
+      Out << "; [" << dwarf::TagString(Tag) << " ]";
+  }
+}
+
 static void WriteMDNodes(formatted_raw_ostream &Out, TypePrinting &TypePrinter,
                          SlotTracker &Machine) {
   SmallVector<const MDNode *, 16> Nodes;
@@ -898,7 +923,10 @@
       if (++NI != NE)
         Out << ", ";
     }
-    Out << "}\n";
+
+    Out << "}";
+    WriteMDNodeComment(Node, Out);
+    Out << "\n";
   }
 }