[llvm-commits] [llvm] r115833 - in /llvm/trunk: include/llvm/Analysis/DebugInfo.h lib/Analysis/DebugInfo.cpp lib/CodeGen/AsmPrinter/DwarfDebug.cpp

[Devang Patel]

Author: dpatel
Date: Wed Oct  6 15:50:40 2010
New Revision: 115833

URL: http://llvm.org/viewvc/llvm-project?rev=115833&view=rev
Log:
Add support for DW_TAG_unspecified_parameters.

Modified:
    llvm/trunk/include/llvm/Analysis/DebugInfo.h
    llvm/trunk/lib/Analysis/DebugInfo.cpp
    llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.cpp

Modified: llvm/trunk/include/llvm/Analysis/DebugInfo.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Analysis/DebugInfo.h?rev=115833&r1=115832&r2=115833&view=diff
==============================================================================
--- llvm/trunk/include/llvm/Analysis/DebugInfo.h (original)
+++ llvm/trunk/include/llvm/Analysis/DebugInfo.h Wed Oct  6 15:50:40 2010
@@ -119,6 +119,7 @@
     bool isEnumerator() const;
     bool isType() const;
     bool isGlobal() const;
+    bool isUnspecifiedParameter() const;
   };
 
   /// DISubrange - This is used to represent ranges, for array bounds.
@@ -626,6 +627,10 @@
     /// implicitly uniques the values returned.
     DISubrange GetOrCreateSubrange(int64_t Lo, int64_t Hi);
 
+    /// CreateUnspecifiedParameter - Create unspeicified type descriptor
+    /// for a subroutine type.
+    DIDescriptor CreateUnspecifiedParameter();
+
     /// CreateCompileUnit - Create a new descriptor for the specified compile
     /// unit.
     DICompileUnit CreateCompileUnit(unsigned LangID,

Modified: llvm/trunk/lib/Analysis/DebugInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Analysis/DebugInfo.cpp?rev=115833&r1=115832&r2=115833&view=diff
==============================================================================
--- llvm/trunk/lib/Analysis/DebugInfo.cpp (original)
+++ llvm/trunk/lib/Analysis/DebugInfo.cpp Wed Oct  6 15:50:40 2010
@@ -199,6 +199,12 @@
   return isGlobalVariable();
 }
 
+/// isUnspecifiedParmeter - Return true if the specified tab is
+/// DW_TAG_unspecified_parameters.
+bool DIDescriptor::isUnspecifiedParameter() const {
+  return DbgNode && getTag() == dwarf::DW_TAG_unspecified_parameters;
+}
+
 /// isScope - Return true if the specified tag is one of the scope
 /// related tag.
 bool DIDescriptor::isScope() const {
@@ -724,7 +730,14 @@
   return DISubrange(MDNode::get(VMContext, &Elts[0], 3));
 }
 
-
+/// CreateUnspecifiedParameter - Create unspeicified type descriptor
+/// for the subroutine type.
+DIDescriptor DIFactory::CreateUnspecifiedParameter() {
+  Value *Elts[] = {
+    GetTagConstant(dwarf::DW_TAG_unspecified_parameters)
+  };
+  return DIDescriptor(MDNode::get(VMContext, &Elts[0], 1));
+}
 
 /// CreateCompileUnit - Create a new descriptor for the specified compile
 /// unit.  Note that this does not unique compile units within the module.

Modified: llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.cpp?rev=115833&r1=115832&r2=115833&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.cpp (original)
+++ llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.cpp Wed Oct  6 15:50:40 2010
@@ -1042,16 +1042,25 @@
     DIDescriptor RTy = Elements.getElement(0);
     addType(&Buffer, DIType(RTy));
 
-    // Add prototype flag.
-    addUInt(&Buffer, dwarf::DW_AT_prototyped, dwarf::DW_FORM_flag, 1);
-
+    bool isPrototyped = true;
     // Add arguments.
     for (unsigned i = 1, N = Elements.getNumElements(); i < N; ++i) {
-      DIE *Arg = new DIE(dwarf::DW_TAG_formal_parameter);
       DIDescriptor Ty = Elements.getElement(i);
-      addType(Arg, DIType(Ty));
-      Buffer.addChild(Arg);
+      if (Ty.isUnspecifiedParameter()) {
+        DIE *Arg = new DIE(dwarf::DW_TAG_unspecified_parameters);
+        Buffer.addChild(Arg);
+        isPrototyped = false;
+      } else {
+        DIE *Arg = new DIE(dwarf::DW_TAG_formal_parameter);
+        addType(Arg, DIType(Ty));
+        Buffer.addChild(Arg);
+      }
     }
+    // Add prototype flag.
+    if (isPrototyped)
+      addUInt(&Buffer, dwarf::DW_AT_prototyped, dwarf::DW_FORM_flag, 1);
+
+
   }
     break;
   case dwarf::DW_TAG_structure_type: