92 lines
2.6 KiB
C
92 lines
2.6 KiB
C
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//===-- RISCVMCExpr.h - RISCV specific MC expression classes ----*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file describes RISCV-specific MCExprs, used for modifiers like
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// "%hi" or "%lo" etc.,
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_RISCV_MCTARGETDESC_RISCVMCEXPR_H
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#define LLVM_LIB_TARGET_RISCV_MCTARGETDESC_RISCVMCEXPR_H
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#include "llvm/MC/MCExpr.h"
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namespace llvm {
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class StringRef;
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class RISCVMCExpr : public MCTargetExpr {
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public:
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enum VariantKind {
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VK_RISCV_None,
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VK_RISCV_LO,
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VK_RISCV_HI,
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VK_RISCV_PCREL_LO,
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VK_RISCV_PCREL_HI,
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VK_RISCV_GOT_HI,
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VK_RISCV_TPREL_LO,
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VK_RISCV_TPREL_HI,
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VK_RISCV_TPREL_ADD,
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VK_RISCV_TLS_GOT_HI,
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VK_RISCV_TLS_GD_HI,
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VK_RISCV_CALL,
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VK_RISCV_CALL_PLT,
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VK_RISCV_32_PCREL,
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VK_RISCV_Invalid
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};
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private:
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const MCExpr *Expr;
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const VariantKind Kind;
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int64_t evaluateAsInt64(int64_t Value) const;
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explicit RISCVMCExpr(const MCExpr *Expr, VariantKind Kind)
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: Expr(Expr), Kind(Kind) {}
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public:
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static const RISCVMCExpr *create(const MCExpr *Expr, VariantKind Kind,
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MCContext &Ctx);
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VariantKind getKind() const { return Kind; }
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const MCExpr *getSubExpr() const { return Expr; }
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/// Get the corresponding PC-relative HI fixup that a VK_RISCV_PCREL_LO
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/// points to, and optionally the fragment containing it.
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///
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/// \returns nullptr if this isn't a VK_RISCV_PCREL_LO pointing to a
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/// known PC-relative HI fixup.
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const MCFixup *getPCRelHiFixup(const MCFragment **DFOut) const;
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void printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const override;
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bool evaluateAsRelocatableImpl(MCValue &Res, const MCAsmLayout *Layout,
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const MCFixup *Fixup) const override;
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void visitUsedExpr(MCStreamer &Streamer) const override;
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MCFragment *findAssociatedFragment() const override {
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return getSubExpr()->findAssociatedFragment();
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}
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void fixELFSymbolsInTLSFixups(MCAssembler &Asm) const override;
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bool evaluateAsConstant(int64_t &Res) const;
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static bool classof(const MCExpr *E) {
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return E->getKind() == MCExpr::Target;
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}
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static bool classof(const RISCVMCExpr *) { return true; }
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static VariantKind getVariantKindForName(StringRef name);
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static StringRef getVariantKindName(VariantKind Kind);
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};
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} // end namespace llvm.
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#endif
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