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      1 //===- subzero/src/IceTargetLoweringX8664.h - lowering for x86-64 -*- C++ -*-=//
      2 //
      3 //                        The Subzero Code Generator
      4 //
      5 // This file is distributed under the University of Illinois Open Source
      6 // License. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 ///
     10 /// \file
     11 /// \brief Declares the TargetLoweringX8664 class, which implements the
     12 /// TargetLowering interface for the X86 64-bit architecture.
     13 ///
     14 //===----------------------------------------------------------------------===//
     15 
     16 #ifndef SUBZERO_SRC_ICETARGETLOWERINGX8664_H
     17 #define SUBZERO_SRC_ICETARGETLOWERINGX8664_H
     18 
     19 #include "IceAssemblerX8664.h"
     20 #include "IceCfg.h"
     21 #include "IceGlobalContext.h"
     22 #include "IceInstX8664.h"
     23 #include "IceTargetLowering.h"
     24 #define X86NAMESPACE X8664
     25 #include "IceTargetLoweringX86Base.h"
     26 #undef X86NAMESPACE
     27 #include "IceTargetLoweringX8664Traits.h"
     28 
     29 namespace Ice {
     30 namespace X8664 {
     31 
     32 class TargetX8664 final : public X8664::TargetX86Base<X8664::Traits> {
     33   TargetX8664() = delete;
     34   TargetX8664(const TargetX8664 &) = delete;
     35   TargetX8664 &operator=(const TargetX8664 &) = delete;
     36 
     37 public:
     38   ~TargetX8664() = default;
     39 
     40   static std::unique_ptr<::Ice::TargetLowering> create(Cfg *Func) {
     41     return makeUnique<TargetX8664>(Func);
     42   }
     43 
     44   std::unique_ptr<::Ice::Assembler> createAssembler() const override {
     45     const bool EmitAddrSizeOverridePrefix =
     46         !NeedSandboxing &&
     47         getFlags().getApplicationBinaryInterface() == ABI_PNaCl;
     48     return makeUnique<X8664::AssemblerX8664>(EmitAddrSizeOverridePrefix);
     49   }
     50 
     51 protected:
     52   void _add_sp(Operand *Adjustment);
     53   void _mov_sp(Operand *NewValue);
     54   Traits::X86OperandMem *_sandbox_mem_reference(X86OperandMem *Mem);
     55   void _sub_sp(Operand *Adjustment);
     56   void _link_bp();
     57   void _unlink_bp();
     58   void _push_reg(Variable *Reg);
     59 
     60   void initRebasePtr();
     61   void initSandbox();
     62   bool legalizeOptAddrForSandbox(OptAddr *Addr);
     63   void emitSandboxedReturn();
     64   void lowerIndirectJump(Variable *JumpTarget);
     65   void emitGetIP(CfgNode *Node);
     66   Inst *emitCallToTarget(Operand *CallTarget, Variable *ReturnReg) override;
     67   Variable *moveReturnValueToRegister(Operand *Value, Type ReturnType) override;
     68 
     69 private:
     70   ENABLE_MAKE_UNIQUE;
     71   friend class X8664::TargetX86Base<X8664::Traits>;
     72 
     73   explicit TargetX8664(Cfg *Func) : TargetX86Base(Func) {}
     74 
     75   void _push_rbp();
     76 
     77   Operand *createNaClReadTPSrcOperand() {
     78     Variable *TDB = makeReg(IceType_i32);
     79     InstCall *Call = makeHelperCall(RuntimeHelper::H_call_read_tp, TDB, 0);
     80     lowerCall(Call);
     81     return TDB;
     82   }
     83 };
     84 
     85 } // end of namespace X8664
     86 } // end of namespace Ice
     87 
     88 #endif // SUBZERO_SRC_ICETARGETLOWERINGX8664_H
     89