Revert rL350048 and rL350050

These patches have broken almost all buildbots on test
DebugInfo/X86/addr_comments.ll. Reverting to green.

llvm-svn: 350052

1 files changed, 8 insertions, 15 deletions

diff --git a/llvm/lib/CodeGen/AsmPrinter/AddressPool.cpp b/llvm/lib/CodeGen/AsmPrinter/AddressPool.cpp
index c57e302..042243b7 100644
--- a/llvm/lib/CodeGen/AsmPrinter/AddressPool.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/AddressPool.cpp
@@ -24,23 +24,21 @@ unsigned AddressPool::getIndex(const MCSymbol *Sym, bool TLS) {
   return IterBool.first->second.Number;
 }
 
-MCSymbol *AddressPool::emitHeader(AsmPrinter &Asm, MCSection *Section) {
+
+void AddressPool::emitHeader(AsmPrinter &Asm, MCSection *Section) {
   static const uint8_t AddrSize = Asm.getDataLayout().getPointerSize();
-  StringRef Prefix = "debug_addr_";
-  MCSymbol *BeginLabel = Asm.createTempSymbol(Prefix + "start");
-  MCSymbol *EndLabel = Asm.createTempSymbol(Prefix + "end");
+  uint64_t Length = sizeof(uint16_t) // version
+                  + sizeof(uint8_t)  // address_size
+                  + sizeof(uint8_t)  // segment_selector_size
+                  + AddrSize * Pool.size(); // entries
   Asm.OutStreamer->AddComment("Length of contribution");
-  Asm.EmitLabelDifference(EndLabel, BeginLabel,
-                          4); // TODO: Support DWARF64 format.
-  Asm.OutStreamer->EmitLabel(BeginLabel);
+  Asm.emitInt32(Length); // TODO: Support DWARF64 format.
   Asm.OutStreamer->AddComment("DWARF version number");
   Asm.emitInt16(Asm.getDwarfVersion());
   Asm.OutStreamer->AddComment("Address size");
   Asm.emitInt8(AddrSize);
   Asm.OutStreamer->AddComment("Segment selector size");
   Asm.emitInt8(0); // TODO: Support non-zero segment_selector_size.
-
-  return EndLabel;
 }
 
 // Emit addresses into the section given.
@@ -51,10 +49,8 @@ void AddressPool::emit(AsmPrinter &Asm, MCSection *AddrSection) {
   // Start the dwarf addr section.
   Asm.OutStreamer->SwitchSection(AddrSection);
 
-  MCSymbol *EndLabel = nullptr;
-
   if (Asm.getDwarfVersion() >= 5)
-    EndLabel = emitHeader(Asm, AddrSection);
+    emitHeader(Asm, AddrSection);
 
   // Define the symbol that marks the start of the contribution.
   // It is referenced via DW_AT_addr_base.
@@ -71,7 +67,4 @@ void AddressPool::emit(AsmPrinter &Asm, MCSection *AddrSection) {
 
   for (const MCExpr *Entry : Entries)
     Asm.OutStreamer->EmitValue(Entry, Asm.getDataLayout().getPointerSize());
-
-  if (EndLabel)
-    Asm.OutStreamer->EmitLabel(EndLabel);
 }