Construct array/vector type DIEs using DebugInfo.

llvm-svn: 61724

2 files changed, 46 insertions, 1 deletions

diff --git a/llvm/lib/Analysis/DebugInfo.cpp b/llvm/lib/Analysis/DebugInfo.cpp
index f1f7d8eff35..8b802d7fffa 100644
--- a/llvm/lib/Analysis/DebugInfo.cpp
+++ b/llvm/lib/Analysis/DebugInfo.cpp
@@ -174,7 +174,12 @@ DIVariable::DIVariable(GlobalVariable *GV) : DIDescriptor(GV) {
     GV = 0;
 }
 
-
+unsigned DIArray::getNumElements() const {
+  assert (GV && "Invalid DIArray");
+  Constant *C = GV->getInitializer();
+  assert (C && "Invalid DIArray initializer");
+  return C->getNumOperands();
+}
 
 //===----------------------------------------------------------------------===//
 // DIFactory: Basic Helpers
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfWriter.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfWriter.cpp
index 30f14b7c9f3..af419822255 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfWriter.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfWriter.cpp
@@ -1512,6 +1512,7 @@ private:
     AddUInt(&Buffer, DW_AT_byte_size, 0, Size);
   }
 
+  /// ConstructType - Construct derived type die from DIDerivedType.
   void ConstructType(CompileUnit *DW_Unit, DIE &Buffer,
                      DIDerivedType *DTy) {
 
@@ -1540,6 +1541,45 @@ private:
     // FIXME - Enable this.     AddSourceLine(&Buffer, *DTy);
   }
 
+  // ConstructSubrangeDIE - Construct subrange DIE from DISubrange.
+  void ConstructSubrangeDIE (DIE &Buffer, DISubrange *SR, DIE *IndexTy) {
+    int64_t L = SR->getLo();
+    int64_t H = SR->getHi();
+    DIE *DW_Subrange = new DIE(DW_TAG_subrange_type);
+    if (L != H) {
+      AddDIEntry(DW_Subrange, DW_AT_type, DW_FORM_ref4, IndexTy);
+      if (L)
+	AddSInt(DW_Subrange, DW_AT_lower_bound, 0, L);
+        AddSInt(DW_Subrange, DW_AT_upper_bound, 0, H);
+    }
+    Buffer.AddChild(DW_Subrange);
+  }
+
+  /// ConstructArrayTypeDIE - Construct array type DIE from DICompositeType.
+  void ConstructArrayTypeDIE(CompileUnit *DW_Unit, DIE &Buffer, 
+                             DICompositeType *CTy) {
+    Buffer.setTag(DW_TAG_array_type);
+    if (CTy->getTag() == DW_TAG_vector_type)
+      AddUInt(&Buffer, DW_AT_GNU_vector, DW_FORM_flag, 1);
+    
+    DIArray Elements = CTy->getTypeArray();
+    // FIXME - Enable this. 
+    // AddType(&Buffer, CTy->getTypeDerivedFrom(), DW_Unit);
+
+    // Construct an anonymous type for index type.
+    DIE IdxBuffer(DW_TAG_base_type);
+    AddUInt(&IdxBuffer, DW_AT_byte_size, 0, sizeof(int32_t));
+    AddUInt(&IdxBuffer, DW_AT_encoding, DW_FORM_data1, DW_ATE_signed);
+    DIE *IndexTy = DW_Unit->AddDie(IdxBuffer);
+
+    // Add subranges to array type.
+    for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
+      DISubrange Element = Elements.getElement(i);
+      ConstructSubrangeDIE(Buffer, &Element, IndexTy);
+    }
+  }
+
+
   /// ConstructType - Adds all the required attributes to the type.
   ///
   void ConstructType(DIE &Buffer, TypeDesc *TyDesc, CompileUnit *Unit) {