Pull in r198029 from upstream llvm trunk (by Venkatraman Govindaraju):

  [Sparc] Add target specific MCExpr class to handle sparc specific modifiers like %hi, %lo, etc.,

Introduced here: http://svnweb.freebsd.org/changeset/base/262261

Index: lib/Target/Sparc/MCTargetDesc/SparcMCExpr.cpp
===================================================================
--- lib/Target/Sparc/MCTargetDesc/SparcMCExpr.cpp
+++ lib/Target/Sparc/MCTargetDesc/SparcMCExpr.cpp
@@ -0,0 +1,84 @@
+//===-- SparcMCExpr.cpp - Sparc specific MC expression classes --------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains the implementation of the assembly expression modifiers
+// accepted by the Sparc architecture (e.g. "%hi", "%lo", ...).
+//
+//===----------------------------------------------------------------------===//
+
+#define DEBUG_TYPE "sparcmcexpr"
+#include "SparcMCExpr.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCAssembler.h"
+#include "llvm/MC/MCELF.h"
+#include "llvm/Object/ELF.h"
+
+
+using namespace llvm;
+
+const SparcMCExpr*
+SparcMCExpr::Create(VariantKind Kind, const MCExpr *Expr,
+                      MCContext &Ctx) {
+    return new (Ctx) SparcMCExpr(Kind, Expr);
+}
+
+
+void SparcMCExpr::PrintImpl(raw_ostream &OS) const
+{
+  bool closeParen = true;
+  switch (Kind) {
+  case VK_Sparc_None:     closeParen = false; break;
+  case VK_Sparc_LO:       OS << "%lo(";  break;
+  case VK_Sparc_HI:       OS << "%hi(";  break;
+  case VK_Sparc_H44:      OS << "%h44("; break;
+  case VK_Sparc_M44:      OS << "%m44("; break;
+  case VK_Sparc_L44:      OS << "%l44("; break;
+  case VK_Sparc_HH:       OS << "%hh(";  break;
+  case VK_Sparc_HM:       OS << "%hm(";  break;
+  case VK_Sparc_TLS_GD_HI22:   OS << "%tgd_hi22(";   break;
+  case VK_Sparc_TLS_GD_LO10:   OS << "%tgd_lo10(";   break;
+  case VK_Sparc_TLS_GD_ADD:    OS << "%tgd_add(";    break;
+  case VK_Sparc_TLS_GD_CALL:   OS << "%tgd_call(";   break;
+  case VK_Sparc_TLS_LDM_HI22:  OS << "%tldm_hi22(";  break;
+  case VK_Sparc_TLS_LDM_LO10:  OS << "%tldm_lo10(";  break;
+  case VK_Sparc_TLS_LDM_ADD:   OS << "%tldm_add(";   break;
+  case VK_Sparc_TLS_LDM_CALL:  OS << "%tldm_call(";  break;
+  case VK_Sparc_TLS_LDO_HIX22: OS << "%tldo_hix22("; break;
+  case VK_Sparc_TLS_LDO_LOX10: OS << "%tldo_lox10("; break;
+  case VK_Sparc_TLS_LDO_ADD:   OS << "%tldo_add(";   break;
+  case VK_Sparc_TLS_IE_HI22:   OS << "%tie_hi22(";   break;
+  case VK_Sparc_TLS_IE_LO10:   OS << "%tie_lo10(";   break;
+  case VK_Sparc_TLS_IE_LD:     OS << "%tie_ld(";     break;
+  case VK_Sparc_TLS_IE_LDX:    OS << "%tie_ldx(";    break;
+  case VK_Sparc_TLS_IE_ADD:    OS << "%tie_add(";    break;
+  case VK_Sparc_TLS_LE_HIX22:  OS << "%tle_hix22(";  break;
+  case VK_Sparc_TLS_LE_LOX10:  OS << "%tle_lox10(";  break;
+  }
+
+  const MCExpr *Expr = getSubExpr();
+  Expr->print(OS);
+  if (closeParen)
+    OS << ')';
+}
+
+bool
+SparcMCExpr::EvaluateAsRelocatableImpl(MCValue &Res,
+                                         const MCAsmLayout *Layout) const {
+  assert(0 && "FIXME: Implement SparcMCExpr::EvaluateAsRelocatableImpl");
+  return getSubExpr()->EvaluateAsRelocatable(Res, *Layout);
+}
+
+
+void SparcMCExpr::fixELFSymbolsInTLSFixups(MCAssembler &Asm) const {
+  assert(0 && "FIXME: Implement SparcMCExpr::fixELFSymbolsInTLSFixups");
+}
+
+void SparcMCExpr::AddValueSymbols(MCAssembler *Asm) const {
+  assert(0 && "FIXME: Implement SparcMCExpr::AddValueSymbols");
+}
Index: lib/Target/Sparc/MCTargetDesc/CMakeLists.txt
===================================================================
--- lib/Target/Sparc/MCTargetDesc/CMakeLists.txt
+++ lib/Target/Sparc/MCTargetDesc/CMakeLists.txt
@@ -1,6 +1,7 @@
 add_llvm_library(LLVMSparcDesc
   SparcMCTargetDesc.cpp
   SparcMCAsmInfo.cpp
+  SparcMCExpr.cpp
   )
 
 add_dependencies(LLVMSparcDesc SparcCommonTableGen)
Index: lib/Target/Sparc/MCTargetDesc/SparcMCExpr.h
===================================================================
--- lib/Target/Sparc/MCTargetDesc/SparcMCExpr.h
+++ lib/Target/Sparc/MCTargetDesc/SparcMCExpr.h
@@ -0,0 +1,98 @@
+//====- SparcMCExpr.h - Sparc specific MC expression classes --*- C++ -*-=====//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file describes Sparc-specific MCExprs, used for modifiers like
+// "%hi" or "%lo" etc.,
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_SPARCMCEXPR_H
+#define LLVM_SPARCMCEXPR_H
+
+#include "llvm/MC/MCExpr.h"
+
+namespace llvm {
+
+class SparcMCExpr : public MCTargetExpr {
+public:
+  enum VariantKind {
+    VK_Sparc_None,
+    VK_Sparc_LO,
+    VK_Sparc_HI,
+    VK_Sparc_H44,
+    VK_Sparc_M44,
+    VK_Sparc_L44,
+    VK_Sparc_HH,
+    VK_Sparc_HM,
+    VK_Sparc_TLS_GD_HI22,
+    VK_Sparc_TLS_GD_LO10,
+    VK_Sparc_TLS_GD_ADD,
+    VK_Sparc_TLS_GD_CALL,
+    VK_Sparc_TLS_LDM_HI22,
+    VK_Sparc_TLS_LDM_LO10,
+    VK_Sparc_TLS_LDM_ADD,
+    VK_Sparc_TLS_LDM_CALL,
+    VK_Sparc_TLS_LDO_HIX22,
+    VK_Sparc_TLS_LDO_LOX10,
+    VK_Sparc_TLS_LDO_ADD,
+    VK_Sparc_TLS_IE_HI22,
+    VK_Sparc_TLS_IE_LO10,
+    VK_Sparc_TLS_IE_LD,
+    VK_Sparc_TLS_IE_LDX,
+    VK_Sparc_TLS_IE_ADD,
+    VK_Sparc_TLS_LE_HIX22,
+    VK_Sparc_TLS_LE_LOX10
+  };
+
+private:
+  const VariantKind Kind;
+  const MCExpr *Expr;
+
+  explicit SparcMCExpr(VariantKind _Kind, const MCExpr *_Expr)
+    : Kind(_Kind), Expr(_Expr) {}
+
+public:
+  /// @name Construction
+  /// @{
+
+  static const SparcMCExpr *Create(VariantKind Kind, const MCExpr *Expr,
+                                 MCContext &Ctx);
+  /// @}
+  /// @name Accessors
+  /// @{
+
+  /// getOpcode - Get the kind of this expression.
+  VariantKind getKind() const { return Kind; }
+
+  /// getSubExpr - Get the child of this expression.
+  const MCExpr *getSubExpr() const { return Expr; }
+
+  /// @}
+  void PrintImpl(raw_ostream &OS) const;
+  bool EvaluateAsRelocatableImpl(MCValue &Res,
+                                 const MCAsmLayout *Layout) const;
+  void AddValueSymbols(MCAssembler *) const;
+  const MCSection *FindAssociatedSection() const {
+    return getSubExpr()->FindAssociatedSection();
+  }
+
+  void fixELFSymbolsInTLSFixups(MCAssembler &Asm) const;
+
+  static bool classof(const MCExpr *E) {
+    return E->getKind() == MCExpr::Target;
+  }
+
+  static bool classof(const SparcMCExpr *) { return true; }
+
+
+};
+
+} // end namespace llvm.
+
+#endif