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7f15e90281
Patch implements %hi(sym1 - sym2) and %lo(sym1 - sym2) expressions for MIPS by creating target expression class MipsMCExpr. Patch by Sasa Stankovic. Differential Revision: http://llvm-reviews.chandlerc.com/D2592 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200783 91177308-0d34-0410-b5e6-96231b3b80d8
70 lines
1.9 KiB
C++
70 lines
1.9 KiB
C++
//===-- MipsMCExpr.h - Mips 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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#ifndef MIPSMCEXPR_H
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#define MIPSMCEXPR_H
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#include "llvm/MC/MCExpr.h"
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#include "llvm/MC/MCValue.h"
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#include "llvm/MC/MCAsmLayout.h"
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namespace llvm {
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class MipsMCExpr : public MCTargetExpr {
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public:
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enum VariantKind {
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VK_Mips_None,
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VK_Mips_ABS_LO,
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VK_Mips_ABS_HI
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};
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private:
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const VariantKind Kind;
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const MCExpr *Expr;
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explicit MipsMCExpr(VariantKind Kind, const MCExpr *Expr)
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: Kind(Kind), Expr(Expr) {}
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public:
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static const MipsMCExpr *Create(VariantKind Kind, const MCExpr *Expr,
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MCContext &Ctx);
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static const MipsMCExpr *CreateLo(const MCExpr *Expr, MCContext &Ctx) {
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return Create(VK_Mips_ABS_LO, Expr, Ctx);
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}
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static const MipsMCExpr *CreateHi(const MCExpr *Expr, MCContext &Ctx) {
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return Create(VK_Mips_ABS_HI, Expr, Ctx);
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}
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/// getOpcode - Get the kind of this expression.
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VariantKind getKind() const { return Kind; }
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/// getSubExpr - Get the child of this expression.
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const MCExpr *getSubExpr() const { return Expr; }
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void PrintImpl(raw_ostream &OS) const;
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bool EvaluateAsRelocatableImpl(MCValue &Res,
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const MCAsmLayout *Layout) const;
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void AddValueSymbols(MCAssembler *) const;
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const MCSection *FindAssociatedSection() const {
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return getSubExpr()->FindAssociatedSection();
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}
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// There are no TLS MipsMCExprs at the moment.
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void fixELFSymbolsInTLSFixups(MCAssembler &Asm) 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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};
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} // end namespace llvm
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#endif
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