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| //===-- RISCVMCExpr.h - RISCV specific MC expression classes ----*- C++ -*-===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// This file describes RISCV-specific MCExprs, used for modifiers like
// "%hi" or "%lo" etc.,
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_TARGET_RISCV_MCTARGETDESC_RISCVMCEXPR_H
#define LLVM_LIB_TARGET_RISCV_MCTARGETDESC_RISCVMCEXPR_H
#include "llvm/MC/MCExpr.h"
namespace llvm {
class StringRef;
class MCOperand;
class RISCVMCExpr : public MCTargetExpr {
public:
enum VariantKind {
VK_RISCV_None,
VK_RISCV_LO,
VK_RISCV_HI,
VK_RISCV_PCREL_LO,
VK_RISCV_PCREL_HI,
VK_RISCV_GOT_HI,
VK_RISCV_TPREL_LO,
VK_RISCV_TPREL_HI,
VK_RISCV_TPREL_ADD,
VK_RISCV_TLS_GOT_HI,
VK_RISCV_TLS_GD_HI,
VK_RISCV_CALL,
VK_RISCV_CALL_PLT,
VK_RISCV_32_PCREL,
VK_RISCV_Invalid
};
private:
const MCExpr *Expr;
const VariantKind Kind;
int64_t evaluateAsInt64(int64_t Value) const;
bool evaluatePCRelLo(MCValue &Res, const MCAsmLayout *Layout,
const MCFixup *Fixup) const;
explicit RISCVMCExpr(const MCExpr *Expr, VariantKind Kind)
: Expr(Expr), Kind(Kind) {}
public:
static const RISCVMCExpr *create(const MCExpr *Expr, VariantKind Kind,
MCContext &Ctx);
VariantKind getKind() const { return Kind; }
const MCExpr *getSubExpr() const { return Expr; }
/// Get the corresponding PC-relative HI fixup that a VK_RISCV_PCREL_LO
/// points to.
///
/// \returns nullptr if this isn't a VK_RISCV_PCREL_LO pointing to a
/// known PC-relative HI fixup.
const MCFixup *getPCRelHiFixup() const;
void printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const override;
bool evaluateAsRelocatableImpl(MCValue &Res, const MCAsmLayout *Layout,
const MCFixup *Fixup) const override;
void visitUsedExpr(MCStreamer &Streamer) const override;
MCFragment *findAssociatedFragment() const override {
return getSubExpr()->findAssociatedFragment();
}
void fixELFSymbolsInTLSFixups(MCAssembler &Asm) const override;
bool evaluateAsConstant(int64_t &Res) const;
static bool classof(const MCExpr *E) {
return E->getKind() == MCExpr::Target;
}
static bool classof(const RISCVMCExpr *) { return true; }
static VariantKind getVariantKindForName(StringRef name);
static StringRef getVariantKindName(VariantKind Kind);
};
} // end namespace llvm.
#endif
|