Debug Info: revert 178722 for now.

There is a difference for FORM_ref_addr between DWARF 2 and DWARF 3+.
Since Eric is against guarding DWARF 2 ref_addr with DarwinGDBCompat, we are
still in discussion on how to handle this.

The correct solution is to update our header to say version 4 instead of version
2 and update tool chains as well.

rdar://problem/13559431


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178806 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 4 insertions, 15 deletions

diff --git a/lib/CodeGen/AsmPrinter/DIE.cpp b/lib/CodeGen/AsmPrinter/DIE.cpp
index 326fbe5567..57e0acda89 100644
--- a/lib/CodeGen/AsmPrinter/DIE.cpp
+++ b/lib/CodeGen/AsmPrinter/DIE.cpp
@@ -310,12 +310,6 @@ void DIEEntry::EmitValue(AsmPrinter *AP, unsigned Form) const {
   AP->EmitInt32(Entry->getOffset());
 }
 
-unsigned DIEEntry::SizeOf(AsmPrinter *AP, unsigned Form) const {
-  if (Form == dwarf::DW_FORM_ref_addr)
-    return AP->getDataLayout().getPointerSize();
-  return sizeof(int32_t);
-}
-
 #ifndef NDEBUG
 void DIEEntry::print(raw_ostream &O) {
   O << format("Die: 0x%lx", (long)(intptr_t)Entry);
diff --git a/lib/CodeGen/AsmPrinter/DIE.h b/lib/CodeGen/AsmPrinter/DIE.h
index 8d68fd595f..c332aa2a7d 100644
--- a/lib/CodeGen/AsmPrinter/DIE.h
+++ b/lib/CodeGen/AsmPrinter/DIE.h
@@ -336,7 +336,9 @@ namespace llvm {
 
     /// SizeOf - Determine size of debug information entry in bytes.
     ///
-    virtual unsigned SizeOf(AsmPrinter *AP, unsigned Form) const;
+    virtual unsigned SizeOf(AsmPrinter *AP, unsigned Form) const {
+      return sizeof(int32_t);
+    }
 
     // Implement isa/cast/dyncast.
     static bool classof(const DIEValue *E) { return E->getType() == isEntry; }
diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index b6b0bb1237..d3cb4f9c1c 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -1791,14 +1791,7 @@ void DwarfDebug::emitDIE(DIE *Die, std::vector<DIEAbbrev *> *Abbrevs) {
         DwarfUnits &Holder = useSplitDwarf() ? SkeletonHolder : InfoHolder;
         Addr += Holder.getCUOffset(Origin->getCompileUnit());
       }
-      // DWARF4: References that use the attribute form DW_FORM_ref_addr are
-      // specified to be four bytes in the DWARF 32-bit format and eight bytes
-      // in the DWARF 64-bit format, while DWARF Version 2 specifies that such
-      // references have the same size as an address on the target system.
-      // Our current version is version 2.
-      Asm->OutStreamer.EmitIntValue(Addr,
-          Form == dwarf::DW_FORM_ref_addr ?
-          Asm->getDataLayout().getPointerSize() : 4);
+      Asm->EmitInt32(Addr);
       break;
     }
     case dwarf::DW_AT_ranges: {