Do not construct DIE for already processed MDNode.

[oota-llvm.git] / lib / CodeGen / AsmPrinter / DwarfDebug.cpp

diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 2a25cb910100b3d773ecb131b74a9b058e2cbdad..50c0feac0911aae35f8b22e0118de44703c2393d 100644 (file)
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -321,6 +321,7 @@ DwarfDebug::DwarfDebug(AsmPrinter *A, Module *M)
   DwarfFrameSectionSym = DwarfInfoSectionSym = DwarfAbbrevSectionSym = 0;
   DwarfStrSectionSym = TextSectionSym = 0;
   DwarfDebugRangeSectionSym = DwarfDebugLocSectionSym = 0; 
+  DwarfDebugLineSectionSym = CurrentLineSectionSym = 0;
   FunctionBeginSym = FunctionEndSym = 0;
   {
     NamedRegionTimer T(DbgTimerName, DWARFGroupName, TimePassesIsEnabled);
@@ -1794,9 +1795,9 @@ void DwarfDebug::constructCompileUnit(const MDNode *N) {
   // simplifies debug range entries.
   addUInt(Die, dwarf::DW_AT_entry_pc, dwarf::DW_FORM_addr, 0);
   // DW_AT_stmt_list is a offset of line number information for this
-  // compile unit in debug_line section. It is always zero when only one
-  // compile unit is emitted in one object file.
-  addUInt(Die, dwarf::DW_AT_stmt_list, dwarf::DW_FORM_data4, 0);
+  // compile unit in debug_line section. This offset is calculated 
+  // during endMoudle().
+  addLabel(Die, dwarf::DW_AT_stmt_list, dwarf::DW_FORM_data4, 0);
 
   if (!Dir.empty())
     addString(Die, dwarf::DW_AT_comp_dir, dwarf::DW_FORM_string, Dir);
@@ -2081,15 +2082,15 @@ void DwarfDebug::endModule() {
   // Compute DIE offsets and sizes.
   computeSizeAndOffsets();
 
+  // Emit source line correspondence into a debug line section.
+  emitDebugLines();
+
   // Emit all the DIEs into a debug info section
   emitDebugInfo();
 
   // Corresponding abbreviations into a abbrev section.
   emitAbbreviations();
 
-  // Emit source line correspondence into a debug line section.
-  emitDebugLines();
-
   // Emit info into a debug pubnames section.
   emitDebugPubNames();
 
@@ -2745,7 +2746,6 @@ void DwarfDebug::endFunction(const MachineFunction *MF) {
     // Construct abstract scopes.
     for (SmallVector<DbgScope *, 4>::iterator AI = AbstractScopesList.begin(),
            AE = AbstractScopesList.end(); AI != AE; ++AI) {
-      constructScopeDIE(*AI);
       DISubprogram SP((*AI)->getScopeNode());
       if (SP.Verify()) {
         // Collect info for variables that were optimized out.
@@ -2760,12 +2760,14 @@ void DwarfDebug::endFunction(const MachineFunction *MF) {
           DIVariable DV(cast_or_null<MDNode>(NMD->getOperand(i)));
           if (!DV || !ProcessedVars.insert(DV))
             continue;
-          DbgScope *Scope = DbgScopeMap.lookup(DV.getContext());
+          DbgScope *Scope = AbstractScopes.lookup(DV.getContext());
           if (Scope)
             Scope->addVariable(new DbgVariable(DV));
           }
         }
       }
+      if (ProcessedSPNodes.count((*AI)->getScopeNode()) == 0)
+        constructScopeDIE(*AI);
     }
     
     DIE *CurFnDIE = constructScopeDIE(CurrentFnDbgScope);
@@ -2992,7 +2994,8 @@ void DwarfDebug::EmitSectionLabels() {
   if (const MCSection *MacroInfo = TLOF.getDwarfMacroInfoSection())
     EmitSectionSym(Asm, MacroInfo);
 
-  EmitSectionSym(Asm, TLOF.getDwarfLineSection());
+  DwarfDebugLineSectionSym = 
+    EmitSectionSym(Asm, TLOF.getDwarfLineSection(), "section_line");
   EmitSectionSym(Asm, TLOF.getDwarfLocSection());
   EmitSectionSym(Asm, TLOF.getDwarfPubNamesSection());
   EmitSectionSym(Asm, TLOF.getDwarfPubTypesSection());
@@ -3055,6 +3058,11 @@ void DwarfDebug::emitDIE(DIE *Die) {
                                      4);
       break;
     }
+    case dwarf::DW_AT_stmt_list: {
+      Asm->EmitLabelDifference(CurrentLineSectionSym, 
+                               DwarfDebugLineSectionSym, 4);
+      break;
+    }
     case dwarf::DW_AT_location: {
       if (UseDotDebugLocEntry.count(Die) != 0) {
         DIELabel *L = cast<DIELabel>(Values[i]);
@@ -3200,6 +3208,8 @@ void DwarfDebug::emitDebugLines() {
                             Asm->getObjFileLowering().getDwarfLineSection());
 
   // Construct the section header.
+  CurrentLineSectionSym = Asm->GetTempSymbol("section_line_begin");
+  Asm->OutStreamer.EmitLabel(CurrentLineSectionSym);
   Asm->OutStreamer.AddComment("Length of Source Line Info");
   Asm->EmitLabelDifference(Asm->GetTempSymbol("line_end"),
                            Asm->GetTempSymbol("line_begin"), 4);