--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/llvm/lib/Target/Hexagon/MCTargetDesc/HexagonMCExpr.cpp	Thu Feb 13 15:10:13 2020 +0900
@@ -0,0 +1,119 @@
+//===-- HexagonMCExpr.cpp - Hexagon specific MC expression classes
+//----------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "HexagonMCExpr.h"
+#include "llvm/BinaryFormat/ELF.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/MC/MCSymbolELF.h"
+#include "llvm/MC/MCValue.h"
+#include "llvm/Support/raw_ostream.h"
+
+using namespace llvm;
+
+#define DEBUG_TYPE "hexagon-mcexpr"
+
+HexagonMCExpr *HexagonMCExpr::create(MCExpr const *Expr, MCContext &Ctx) {
+  return new (Ctx) HexagonMCExpr(Expr);
+}
+
+bool HexagonMCExpr::evaluateAsRelocatableImpl(MCValue &Res,
+                                              MCAsmLayout const *Layout,
+                                              MCFixup const *Fixup) const {
+  return Expr->evaluateAsRelocatable(Res, Layout, Fixup);
+}
+
+void HexagonMCExpr::visitUsedExpr(MCStreamer &Streamer) const {
+  Streamer.visitUsedExpr(*Expr);
+}
+
+MCFragment *llvm::HexagonMCExpr::findAssociatedFragment() const {
+  return Expr->findAssociatedFragment();
+}
+
+static void fixELFSymbolsInTLSFixupsImpl(const MCExpr *Expr, MCAssembler &Asm) {
+  switch (Expr->getKind()) {
+  case MCExpr::Target:
+    llvm_unreachable("Cannot handle nested target MCExpr");
+    break;
+  case MCExpr::Constant:
+    break;
+
+  case MCExpr::Binary: {
+    const MCBinaryExpr *be = cast<MCBinaryExpr>(Expr);
+    fixELFSymbolsInTLSFixupsImpl(be->getLHS(), Asm);
+    fixELFSymbolsInTLSFixupsImpl(be->getRHS(), Asm);
+    break;
+  }
+  case MCExpr::SymbolRef: {
+    const MCSymbolRefExpr &symRef = *cast<MCSymbolRefExpr>(Expr);
+    switch (symRef.getKind()) {
+    default:
+      return;
+    case MCSymbolRefExpr::VK_Hexagon_GD_GOT:
+    case MCSymbolRefExpr::VK_Hexagon_LD_GOT:
+    case MCSymbolRefExpr::VK_Hexagon_GD_PLT:
+    case MCSymbolRefExpr::VK_Hexagon_LD_PLT:
+    case MCSymbolRefExpr::VK_Hexagon_IE:
+    case MCSymbolRefExpr::VK_Hexagon_IE_GOT:
+    case MCSymbolRefExpr::VK_TPREL:
+      break;
+    }
+    cast<MCSymbolELF>(symRef.getSymbol()).setType(ELF::STT_TLS);
+    break;
+  }
+  case MCExpr::Unary:
+    fixELFSymbolsInTLSFixupsImpl(cast<MCUnaryExpr>(Expr)->getSubExpr(), Asm);
+    break;
+  }
+}
+
+void HexagonMCExpr::fixELFSymbolsInTLSFixups(MCAssembler &Asm) const {
+  auto expr = getExpr();
+  fixELFSymbolsInTLSFixupsImpl(expr, Asm);
+}
+
+MCExpr const *HexagonMCExpr::getExpr() const { return Expr; }
+
+void HexagonMCExpr::setMustExtend(bool Val) {
+  assert((!Val || !MustNotExtend) && "Extension contradiction");
+  MustExtend = Val;
+}
+
+bool HexagonMCExpr::mustExtend() const { return MustExtend; }
+void HexagonMCExpr::setMustNotExtend(bool Val) {
+  assert((!Val || !MustExtend) && "Extension contradiction");
+  MustNotExtend = Val;
+}
+bool HexagonMCExpr::mustNotExtend() const { return MustNotExtend; }
+
+bool HexagonMCExpr::s27_2_reloc() const { return S27_2_reloc; }
+void HexagonMCExpr::setS27_2_reloc(bool Val) {
+  S27_2_reloc = Val;
+}
+
+bool HexagonMCExpr::classof(MCExpr const *E) {
+  return E->getKind() == MCExpr::Target;
+}
+
+HexagonMCExpr::HexagonMCExpr(MCExpr const *Expr)
+    : Expr(Expr), MustNotExtend(false), MustExtend(false), S27_2_reloc(false),
+      SignMismatch(false) {}
+
+void HexagonMCExpr::printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const {
+  Expr->print(OS, MAI);
+}
+
+void HexagonMCExpr::setSignMismatch(bool Val) {
+  SignMismatch = Val;
+}
+
+bool HexagonMCExpr::signMismatch() const {
+  return SignMismatch;
+}