1 //===-- MipsMCExpr.h - Mips specific MC expression classes ------*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #ifndef LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSMCEXPR_H
11 #define LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSMCEXPR_H
12 
13 #include "llvm/MC/MCAsmLayout.h"
14 #include "llvm/MC/MCExpr.h"
15 #include "llvm/MC/MCValue.h"
16 
17 namespace llvm {
18 
19 class MipsMCExpr : public MCTargetExpr {
20 public:
21   enum VariantKind {
22     VK_Mips_None,
23     VK_Mips_LO,
24     VK_Mips_HI,
25     VK_Mips_HIGHER,
26     VK_Mips_HIGHEST
27   };
28 
29 private:
30   const VariantKind Kind;
31   const MCExpr *Expr;
32 
MipsMCExpr(VariantKind Kind,const MCExpr * Expr)33   explicit MipsMCExpr(VariantKind Kind, const MCExpr *Expr)
34     : Kind(Kind), Expr(Expr) {}
35 
36 public:
37   static bool isSupportedBinaryExpr(MCSymbolRefExpr::VariantKind VK,
38                                     const MCBinaryExpr *BE);
39 
40   static const MipsMCExpr *Create(MCSymbolRefExpr::VariantKind VK,
41                                   const MCExpr *Expr, MCContext &Ctx);
42 
43   /// getOpcode - Get the kind of this expression.
getKind()44   VariantKind getKind() const { return Kind; }
45 
46   /// getSubExpr - Get the child of this expression.
getSubExpr()47   const MCExpr *getSubExpr() const { return Expr; }
48 
49   void PrintImpl(raw_ostream &OS) const override;
50   bool EvaluateAsRelocatableImpl(MCValue &Res,
51                                  const MCAsmLayout *Layout,
52                                  const MCFixup *Fixup) const override;
53   void visitUsedExpr(MCStreamer &Streamer) const override;
FindAssociatedSection()54   const MCSection *FindAssociatedSection() const override {
55     return getSubExpr()->FindAssociatedSection();
56   }
57 
58   // There are no TLS MipsMCExprs at the moment.
fixELFSymbolsInTLSFixups(MCAssembler & Asm)59   void fixELFSymbolsInTLSFixups(MCAssembler &Asm) const override {}
60 
classof(const MCExpr * E)61   static bool classof(const MCExpr *E) {
62     return E->getKind() == MCExpr::Target;
63   }
64 };
65 } // end namespace llvm
66 
67 #endif
68