forked from OSchip/llvm-project
79 lines
2.2 KiB
C++
79 lines
2.2 KiB
C++
//===-- RISCVMCExpr.h - RISCV specific MC expression classes ----*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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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 MCOperand;
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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_CALL,
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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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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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// There are no TLS RISCVMCExprs at the moment.
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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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