commit 82aaacec7c2d63a23febea743bba79186807dbec
author Devang Patel <dpatel@apple.com> Wed Jul 07 22:20:57 2010 +0000
committer Devang Patel <dpatel@apple.com> Wed Jul 07 22:20:57 2010 +0000
tree 047a8b5dee0e93e41e613804582a147e1c3beae9
parent 0284a60ee82d70fdd48c779caae72470cdae3643

One MDNode may be used to create regular DIE as well as abstract DIE.
Keep track of abstract subprogram DIEs. 


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107822 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/AsmPrinter/DwarfDebug.cpp

diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 5a06ded..775012b 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -1389,6 +1389,7 @@
 DIE *DwarfDebug::updateSubprogramScopeDIE(const MDNode *SPNode) {
   CompileUnit *SPCU = getCompileUnit(SPNode);
   DIE *SPDie = SPCU->getDIE(SPNode);
+
   assert(SPDie && "Unable to find subprogram DIE!");
   DISubprogram SP(SPNode);
   
@@ -1422,6 +1423,14 @@
     SPCU->addDie(SPDie);
   }
   
+  // Pick up abstract subprogram DIE.
+  if (DIE *AbsSPDIE = AbstractSPDies.lookup(SPNode)) {
+    SPDie = new DIE(dwarf::DW_TAG_subprogram);
+    addDIEEntry(SPDie, dwarf::DW_AT_abstract_origin,
+                dwarf::DW_FORM_ref4, AbsSPDIE);
+    SPCU->addDie(SPDie);
+  }
+
   addLabel(SPDie, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr,
            Asm->GetTempSymbol("func_begin", Asm->getFunctionNumber()));
   addLabel(SPDie, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr,
@@ -1695,8 +1704,12 @@
     ScopeDIE = constructInlinedScopeDIE(Scope);
   else if (DS.isSubprogram()) {
     ProcessedSPNodes.insert(DS);
-    if (Scope->isAbstractScope())
+    if (Scope->isAbstractScope()) {
       ScopeDIE = getCompileUnit(DS)->getDIE(DS);
+      // Note down abstract DIE.
+      if (ScopeDIE)
+        AbstractSPDies.insert(std::make_pair(DS, ScopeDIE));
+    }
     else
       ScopeDIE = updateSubprogramScopeDIE(DS);
   }