1 //===-- PPCMCExpr.h - PPC 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_POWERPC_MCTARGETDESC_PPCMCEXPR_H 11 #define LLVM_LIB_TARGET_POWERPC_MCTARGETDESC_PPCMCEXPR_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 PPCMCExpr : public MCTargetExpr { 20 public: 21 enum VariantKind { 22 VK_PPC_None, 23 VK_PPC_LO, 24 VK_PPC_HI, 25 VK_PPC_HA, 26 VK_PPC_HIGHER, 27 VK_PPC_HIGHERA, 28 VK_PPC_HIGHEST, 29 VK_PPC_HIGHESTA 30 }; 31 32 private: 33 const VariantKind Kind; 34 const MCExpr *Expr; 35 bool IsDarwin; 36 37 int64_t evaluateAsInt64(int64_t Value) const; 38 39 explicit PPCMCExpr(VariantKind Kind, const MCExpr *Expr, bool IsDarwin) 40 : Kind(Kind), Expr(Expr), IsDarwin(IsDarwin) {} 41 42 public: 43 /// @name Construction 44 /// @{ 45 46 static const PPCMCExpr *create(VariantKind Kind, const MCExpr *Expr, 47 bool isDarwin, MCContext &Ctx); 48 49 static const PPCMCExpr *createLo(const MCExpr *Expr, 50 bool isDarwin, MCContext &Ctx) { 51 return create(VK_PPC_LO, Expr, isDarwin, Ctx); 52 } 53 54 static const PPCMCExpr *createHi(const MCExpr *Expr, 55 bool isDarwin, MCContext &Ctx) { 56 return create(VK_PPC_HI, Expr, isDarwin, Ctx); 57 } 58 59 static const PPCMCExpr *createHa(const MCExpr *Expr, 60 bool isDarwin, MCContext &Ctx) { 61 return create(VK_PPC_HA, Expr, isDarwin, Ctx); 62 } 63 64 /// @} 65 /// @name Accessors 66 /// @{ 67 68 /// getOpcode - Get the kind of this expression. 69 VariantKind getKind() const { return Kind; } 70 71 /// getSubExpr - Get the child of this expression. 72 const MCExpr *getSubExpr() const { return Expr; } 73 74 /// isDarwinSyntax - True if expression is to be printed using Darwin syntax. 75 bool isDarwinSyntax() const { return IsDarwin; } 76 77 78 /// @} 79 80 void printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const override; 81 bool evaluateAsRelocatableImpl(MCValue &Res, 82 const MCAsmLayout *Layout, 83 const MCFixup *Fixup) const override; 84 void visitUsedExpr(MCStreamer &Streamer) const override; 85 MCFragment *findAssociatedFragment() const override { 86 return getSubExpr()->findAssociatedFragment(); 87 } 88 89 // There are no TLS PPCMCExprs at the moment. 90 void fixELFSymbolsInTLSFixups(MCAssembler &Asm) const override {} 91 92 bool evaluateAsConstant(int64_t &Res) const; 93 94 static bool classof(const MCExpr *E) { 95 return E->getKind() == MCExpr::Target; 96 } 97 }; 98 } // end namespace llvm 99 100 #endif 101
