1//===-- HexagonMCExpr.cpp - Hexagon specific MC expression classes
2//----------===//
3//
4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5// See https://llvm.org/LICENSE.txt for license information.
6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7//
8//===----------------------------------------------------------------------===//
9
10#include "HexagonMCExpr.h"
11#include "llvm/BinaryFormat/ELF.h"
12#include "llvm/MC/MCContext.h"
13#include "llvm/MC/MCStreamer.h"
14#include "llvm/MC/MCSymbolELF.h"
15#include "llvm/MC/MCValue.h"
16#include "llvm/Support/Casting.h"
17#include "llvm/Support/raw_ostream.h"
18
19using namespace llvm;
20
21#define DEBUG_TYPE "hexagon-mcexpr"
22
23HexagonMCExpr *HexagonMCExpr::create(MCExpr const *Expr, MCContext &Ctx) {
24  return new (Ctx) HexagonMCExpr(Expr);
25}
26
27bool HexagonMCExpr::evaluateAsRelocatableImpl(MCValue &Res,
28                                              MCAsmLayout const *Layout,
29                                              MCFixup const *Fixup) const {
30  return Expr->evaluateAsRelocatable(Res, Layout, Fixup);
31}
32
33void HexagonMCExpr::visitUsedExpr(MCStreamer &Streamer) const {
34  Streamer.visitUsedExpr(*Expr);
35}
36
37MCFragment *llvm::HexagonMCExpr::findAssociatedFragment() const {
38  return Expr->findAssociatedFragment();
39}
40
41static void fixELFSymbolsInTLSFixupsImpl(const MCExpr *Expr, MCAssembler &Asm) {
42  switch (Expr->getKind()) {
43  case MCExpr::Target:
44    llvm_unreachable("Cannot handle nested target MCExpr");
45    break;
46  case MCExpr::Constant:
47    break;
48
49  case MCExpr::Binary: {
50    const MCBinaryExpr *be = cast<MCBinaryExpr>(Expr);
51    fixELFSymbolsInTLSFixupsImpl(be->getLHS(), Asm);
52    fixELFSymbolsInTLSFixupsImpl(be->getRHS(), Asm);
53    break;
54  }
55  case MCExpr::SymbolRef: {
56    const MCSymbolRefExpr &symRef = *cast<MCSymbolRefExpr>(Expr);
57    switch (symRef.getKind()) {
58    default:
59      return;
60    case MCSymbolRefExpr::VK_Hexagon_GD_GOT:
61    case MCSymbolRefExpr::VK_Hexagon_LD_GOT:
62    case MCSymbolRefExpr::VK_Hexagon_GD_PLT:
63    case MCSymbolRefExpr::VK_Hexagon_LD_PLT:
64    case MCSymbolRefExpr::VK_Hexagon_IE:
65    case MCSymbolRefExpr::VK_Hexagon_IE_GOT:
66    case MCSymbolRefExpr::VK_TPREL:
67      break;
68    }
69    cast<MCSymbolELF>(symRef.getSymbol()).setType(ELF::STT_TLS);
70    break;
71  }
72  case MCExpr::Unary:
73    fixELFSymbolsInTLSFixupsImpl(cast<MCUnaryExpr>(Expr)->getSubExpr(), Asm);
74    break;
75  }
76}
77
78void HexagonMCExpr::fixELFSymbolsInTLSFixups(MCAssembler &Asm) const {
79  auto expr = getExpr();
80  fixELFSymbolsInTLSFixupsImpl(expr, Asm);
81}
82
83MCExpr const *HexagonMCExpr::getExpr() const { return Expr; }
84
85void HexagonMCExpr::setMustExtend(bool Val) {
86  assert((!Val || !MustNotExtend) && "Extension contradiction");
87  MustExtend = Val;
88}
89
90bool HexagonMCExpr::mustExtend() const { return MustExtend; }
91void HexagonMCExpr::setMustNotExtend(bool Val) {
92  assert((!Val || !MustExtend) && "Extension contradiction");
93  MustNotExtend = Val;
94}
95bool HexagonMCExpr::mustNotExtend() const { return MustNotExtend; }
96
97bool HexagonMCExpr::s27_2_reloc() const { return S27_2_reloc; }
98void HexagonMCExpr::setS27_2_reloc(bool Val) {
99  S27_2_reloc = Val;
100}
101
102HexagonMCExpr::HexagonMCExpr(MCExpr const *Expr)
103    : Expr(Expr), MustNotExtend(false), MustExtend(false), S27_2_reloc(false),
104      SignMismatch(false) {}
105
106void HexagonMCExpr::printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const {
107  Expr->print(OS, MAI);
108}
109
110void HexagonMCExpr::setSignMismatch(bool Val) {
111  SignMismatch = Val;
112}
113
114bool HexagonMCExpr::signMismatch() const {
115  return SignMismatch;
116}
117