From 6d86492f5ed0f9853ddd3b24e1aa037e305e1784 Mon Sep 17 00:00:00 2001
From: Rafael Espindola <rafael.espindola@gmail.com>
Date: Mon, 6 Dec 2010 15:35:15 +0000
Subject: [PATCH] Revert previous two patches while I try to find out how to
 make both linux and darwin assemblers happy :-(

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121004 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/MC/MCStreamer.h               |  5 -----
 lib/CodeGen/AsmPrinter/AsmPrinterDwarf.cpp |  2 +-
 lib/MC/MCDwarf.cpp                         | 11 +++++++++--
 lib/MC/MCStreamer.cpp                      |  6 ------
 test/CodeGen/X86/aliases.ll                |  2 +-
 5 files changed, 11 insertions(+), 15 deletions(-)

diff --git a/include/llvm/MC/MCStreamer.h b/include/llvm/MC/MCStreamer.h
index fce076a57eb..d89ee9ae126 100644
--- a/include/llvm/MC/MCStreamer.h
+++ b/include/llvm/MC/MCStreamer.h
@@ -249,11 +249,6 @@ namespace llvm {
     virtual void EmitIntValue(uint64_t Value, unsigned Size,
                               unsigned AddrSpace = 0);
 
-    /// EmitAbsValue - Emit the Value, but try to avoid relocations. On MachO
-    /// this is done by producing
-    /// foo = value
-    /// .long foo
-    void EmitAbsValue(const MCExpr *Value, unsigned Size);
 
     virtual void EmitULEB128Value(const MCExpr *Value,
                                   unsigned AddrSpace = 0) = 0;
diff --git a/lib/CodeGen/AsmPrinter/AsmPrinterDwarf.cpp b/lib/CodeGen/AsmPrinter/AsmPrinterDwarf.cpp
index 1f7ac95f7b3..f737e90b155 100644
--- a/lib/CodeGen/AsmPrinter/AsmPrinterDwarf.cpp
+++ b/lib/CodeGen/AsmPrinter/AsmPrinterDwarf.cpp
@@ -156,7 +156,7 @@ void AsmPrinter::EmitReference(const MCSymbol *Sym, unsigned Encoding) const {
   
   const MCExpr *Exp =
     TLOF.getExprForDwarfReference(Sym, Mang, MMI, Encoding, OutStreamer);
-  OutStreamer.EmitAbsValue(Exp, GetSizeOfEncodedValue(Encoding));
+  OutStreamer.EmitValue(Exp, GetSizeOfEncodedValue(Encoding), /*addrspace*/0);
 }
 
 void AsmPrinter::EmitReference(const GlobalValue *GV, unsigned Encoding)const{
diff --git a/lib/MC/MCDwarf.cpp b/lib/MC/MCDwarf.cpp
index 5d36ee3e626..53731dca7eb 100644
--- a/lib/MC/MCDwarf.cpp
+++ b/lib/MC/MCDwarf.cpp
@@ -213,8 +213,15 @@ void MCDwarfFileTable::Emit(MCStreamer *MCOS,
 
   // The first 4 bytes is the total length of the information for this
   // compilation unit (not including these 4 bytes for the length).
-  MCOS->EmitAbsValue(MakeStartMinusEndExpr(MCOS, LineStartSym, LineEndSym,4),
-                     4);
+  // FIXME: We create the dummy TotalLength variable because LineEndSym points
+  // to the end of the section and the darwin assembler doesn't consider that
+  // difference an assembly time constant. It might be better for this to be
+  // proected by a flag.
+  MCSymbol *TotalLength = MCOS->getContext().CreateTempSymbol();
+  MCOS->EmitAssignment(TotalLength,
+		       MakeStartMinusEndExpr(MCOS, LineStartSym, LineEndSym,
+					     4));
+  MCOS->EmitSymbolValue(TotalLength, 4, 0);
 
   // Next 2 bytes is the Version, which is Dwarf 2.
   MCOS->EmitIntValue(2, 2);
diff --git a/lib/MC/MCStreamer.cpp b/lib/MC/MCStreamer.cpp
index b9d59056f3b..6df4ae44e40 100644
--- a/lib/MC/MCStreamer.cpp
+++ b/lib/MC/MCStreamer.cpp
@@ -72,12 +72,6 @@ void MCStreamer::EmitSLEB128IntValue(int64_t Value, unsigned AddrSpace) {
   EmitBytes(OSE.str(), AddrSpace);
 }
 
-void MCStreamer::EmitAbsValue(const MCExpr *Value, unsigned Size) {
-  MCSymbol *ABS = getContext().CreateTempSymbol();
-  EmitAssignment(ABS, Value);
-  EmitSymbolValue(ABS, Size, 0);
-}
-
 void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size,
                                  unsigned AddrSpace) {
   EmitValue(MCSymbolRefExpr::Create(Sym, getContext()), Size, AddrSpace);
diff --git a/test/CodeGen/X86/aliases.ll b/test/CodeGen/X86/aliases.ll
index 33a659dfd3f..3ed3bd67cef 100644
--- a/test/CodeGen/X86/aliases.ll
+++ b/test/CodeGen/X86/aliases.ll
@@ -1,5 +1,5 @@
 ; RUN: llc < %s -mtriple=i686-pc-linux-gnu -asm-verbose=false -o %t
-; RUN: grep { = } %t   | count 17
+; RUN: grep { = } %t   | count 16
 ; RUN: grep set %t   | count 18
 ; RUN: grep globl %t | count 6
 ; RUN: grep weak %t  | count 1