Revert "Debug info: Support variadic functions."

This reverts commit r202184 because of buildbot breakage.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202187 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 21 insertions, 37 deletions

diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index f9ee2705a3..2425948ae9 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -582,7 +582,7 @@ DIE *DwarfDebug::createScopeChildrenDIE(DwarfCompileUnit *TheCU,
   DIE *ObjectPointer = NULL;
 
   // Collect arguments for current function.
-  if (LScopes.isCurrentFunctionScope(Scope)) {
+  if (LScopes.isCurrentFunctionScope(Scope))
     for (unsigned i = 0, N = CurrentFnArguments.size(); i < N; ++i)
       if (DbgVariable *ArgDV = CurrentFnArguments[i])
         if (DIE *Arg =
@@ -592,16 +592,6 @@ DIE *DwarfDebug::createScopeChildrenDIE(DwarfCompileUnit *TheCU,
             ObjectPointer = Arg;
         }
 
-    // Create the unspecified parameter that marks a function as variadic.
-    DISubprogram SP(Scope->getScopeNode());
-    assert(SP.Verify());
-    DIArray FnArgs = SP.getType().getTypeArray();
-    if (FnArgs.getElement(FnArgs.getNumElements()-1).isUnspecifiedParameter()) {
-      DIE *Ellipsis = new DIE(dwarf::DW_TAG_unspecified_parameters);
-      Children.push_back(Ellipsis);
-    }
-  }
-
   // Collect lexical scope children first.
   const SmallVectorImpl<DbgVariable *> &Variables =
       ScopeVariables.lookup(Scope);
diff --git a/lib/CodeGen/AsmPrinter/DwarfUnit.cpp b/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
index 4626c43f56..81dbfc505a 100644
--- a/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
@@ -1139,22 +1139,6 @@ void DwarfUnit::constructTypeDIE(DIE &Buffer, DIDerivedType DTy) {
     addSourceLine(&Buffer, DTy);
 }
 
-/// constructSubprogramArguments - Construct function argument DIEs.
-void DwarfUnit::constructSubprogramArguments(DIE &Buffer, DIArray Args) {
-    for (unsigned i = 1, N = Args.getNumElements(); i < N; ++i) {
-      DIDescriptor Ty = Args.getElement(i);
-      if (Ty.isUnspecifiedParameter()) {
-        assert(i == N-1 && "ellipsis must be the last argument");
-        createAndAddDIE(dwarf::DW_TAG_unspecified_parameters, Buffer);
-      } else {
-        DIE *Arg = createAndAddDIE(dwarf::DW_TAG_formal_parameter, Buffer);
-        addType(Arg, DIType(Ty));
-        if (DIType(Ty).isArtificial())
-          addFlag(Arg, dwarf::DW_AT_artificial);
-      }
-    }
-}
-
 /// constructTypeDIE - Construct type DIE from DICompositeType.
 void DwarfUnit::constructTypeDIE(DIE &Buffer, DICompositeType CTy) {
   // Add name if not anonymous or intermediate type.
@@ -1178,12 +1162,19 @@ void DwarfUnit::constructTypeDIE(DIE &Buffer, DICompositeType CTy) {
       addType(&Buffer, RTy);
 
     bool isPrototyped = true;
-    if (Elements.getNumElements() == 2 &&
-        Elements.getElement(1).isUnspecifiedParameter())
-      isPrototyped = false;
-
-    constructSubprogramArguments(Buffer, Elements);
-
+    // Add arguments.
+    for (unsigned i = 1, N = Elements.getNumElements(); i < N; ++i) {
+      DIDescriptor Ty = Elements.getElement(i);
+      if (Ty.isUnspecifiedParameter()) {
+        createAndAddDIE(dwarf::DW_TAG_unspecified_parameters, Buffer);
+        isPrototyped = false;
+      } else {
+        DIE *Arg = createAndAddDIE(dwarf::DW_TAG_formal_parameter, Buffer);
+        addType(Arg, DIType(Ty));
+        if (DIType(Ty).isArtificial())
+          addFlag(Arg, dwarf::DW_AT_artificial);
+      }
+    }
     // Add prototype flag if we're dealing with a C language and the
     // function has been prototyped.
     uint16_t Language = getLanguage();
@@ -1466,7 +1457,13 @@ DIE *DwarfUnit::getOrCreateSubprogramDIE(DISubprogram SP) {
 
     // Add arguments. Do not add arguments for subprogram definition. They will
     // be handled while processing variables.
-    constructSubprogramArguments(*SPDie, Args);
+    for (unsigned i = 1, N = Args.getNumElements(); i < N; ++i) {
+      DIE *Arg = createAndAddDIE(dwarf::DW_TAG_formal_parameter, *SPDie);
+      DIType ATy(Args.getElement(i));
+      addType(Arg, ATy);
+      if (ATy.isArtificial())
+        addFlag(Arg, dwarf::DW_AT_artificial);
+    }
   }
 
   if (SP.isArtificial())
diff --git a/lib/CodeGen/AsmPrinter/DwarfUnit.h b/lib/CodeGen/AsmPrinter/DwarfUnit.h
index bf77272b8a..370ecbf831 100644
--- a/lib/CodeGen/AsmPrinter/DwarfUnit.h
+++ b/lib/CodeGen/AsmPrinter/DwarfUnit.h
@@ -476,9 +476,6 @@ protected:
   DIE *getOrCreateStaticMemberDIE(DIDerivedType DT);
 
 private:
-  /// constructSubprogramArguments - Construct function argument DIEs.
-  void constructSubprogramArguments(DIE &Buffer, DIArray Args);
-
   /// constructTypeDIE - Construct basic type die from DIBasicType.
   void constructTypeDIE(DIE &Buffer, DIBasicType BTy);