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      1 //===- subzero/src/IceTargetLoweringX8632.h - x86-32 lowering ---*- 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 TargetLoweringX8632 class, which implements the
     12 /// TargetLowering interface for the x86-32 architecture.
     13 ///
     14 //===----------------------------------------------------------------------===//
     15 
     16 #ifndef SUBZERO_SRC_ICETARGETLOWERINGX8632_H
     17 #define SUBZERO_SRC_ICETARGETLOWERINGX8632_H
     18 
     19 #include "IceAssemblerX8632.h"
     20 #include "IceDefs.h"
     21 #include "IceRegistersX8632.h"
     22 #include "IceTargetLowering.h"
     23 #include "IceInstX8632.h"
     24 #define X86NAMESPACE X8632
     25 #include "IceTargetLoweringX86Base.h"
     26 #undef X86NAMESPACE
     27 #include "IceTargetLoweringX8632Traits.h"
     28 
     29 namespace Ice {
     30 namespace X8632 {
     31 
     32 class TargetX8632 final : public ::Ice::X8632::TargetX86Base<X8632::Traits> {
     33   TargetX8632() = delete;
     34   TargetX8632(const TargetX8632 &) = delete;
     35   TargetX8632 &operator=(const TargetX8632 &) = delete;
     36 
     37 public:
     38   ~TargetX8632() = default;
     39 
     40   static std::unique_ptr<::Ice::TargetLowering> create(Cfg *Func) {
     41     return makeUnique<TargetX8632>(Func);
     42   }
     43 
     44   std::unique_ptr<::Ice::Assembler> createAssembler() const override {
     45     return makeUnique<X8632::AssemblerX8632>();
     46   }
     47 
     48 protected:
     49   void _add_sp(Operand *Adjustment);
     50   void _mov_sp(Operand *NewValue);
     51   Traits::X86OperandMem *_sandbox_mem_reference(X86OperandMem *Mem);
     52   void _sub_sp(Operand *Adjustment);
     53   void _link_bp();
     54   void _unlink_bp();
     55   void _push_reg(Variable *Reg);
     56 
     57   void initRebasePtr();
     58   void initSandbox();
     59   bool legalizeOptAddrForSandbox(OptAddr *Addr);
     60   void emitSandboxedReturn();
     61   void lowerIndirectJump(Variable *JumpTarget);
     62   void emitGetIP(CfgNode *Node);
     63   Inst *emitCallToTarget(Operand *CallTarget, Variable *ReturnReg) override;
     64   Variable *moveReturnValueToRegister(Operand *Value, Type ReturnType) override;
     65 
     66 private:
     67   ENABLE_MAKE_UNIQUE;
     68   friend class X8632::TargetX86Base<X8632::Traits>;
     69 
     70   explicit TargetX8632(Cfg *Func) : TargetX86Base(Func) {}
     71 
     72   Operand *createNaClReadTPSrcOperand() {
     73     Constant *Zero = Ctx->getConstantZero(IceType_i32);
     74     return Traits::X86OperandMem::create(Func, IceType_i32, nullptr, Zero,
     75                                          nullptr, 0,
     76                                          Traits::X86OperandMem::SegReg_GS);
     77   }
     78 };
     79 
     80 } // end of namespace X8632
     81 } // end of namespace Ice
     82 
     83 #endif // SUBZERO_SRC_ICETARGETLOWERINGX8632_H
     84