LCOV - code coverage report
Current view: top level - include/llvm/CodeGen - TargetLoweringObjectFileImpl.h (source / functions) Hit Total Coverage
Test: llvm-toolchain.info Lines: 5 6 83.3 %
Date: 2017-09-14 15:23:50 Functions: 3 8 37.5 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : //==- llvm/CodeGen/TargetLoweringObjectFileImpl.h - Object Info --*- 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             : // This file implements classes used to handle lowerings specific to common
      11             : // object file formats.
      12             : //
      13             : //===----------------------------------------------------------------------===//
      14             : 
      15             : #ifndef LLVM_CODEGEN_TARGETLOWERINGOBJECTFILEIMPL_H
      16             : #define LLVM_CODEGEN_TARGETLOWERINGOBJECTFILEIMPL_H
      17             : 
      18             : #include "llvm/IR/Module.h"
      19             : #include "llvm/MC/MCExpr.h"
      20             : #include "llvm/Target/TargetLoweringObjectFile.h"
      21             : 
      22             : namespace llvm {
      23             : 
      24             : class GlobalValue;
      25             : class MachineModuleInfo;
      26             : class Mangler;
      27             : class MCContext;
      28             : class MCSection;
      29             : class MCSymbol;
      30             : class TargetMachine;
      31             : 
      32             : class TargetLoweringObjectFileELF : public TargetLoweringObjectFile {
      33             :   bool UseInitArray = false;
      34             :   mutable unsigned NextUniqueID = 1;  // ID 0 is reserved for execute-only sections
      35             : 
      36             : protected:
      37             :   MCSymbolRefExpr::VariantKind PLTRelativeVariantKind =
      38             :       MCSymbolRefExpr::VK_None;
      39             : 
      40             : public:
      41       39264 :   TargetLoweringObjectFileELF() = default;
      42       10116 :   ~TargetLoweringObjectFileELF() override = default;
      43             : 
      44             :   /// Emit Obj-C garbage collection and linker options.
      45             :   void emitModuleMetadata(MCStreamer &Streamer, Module &M,
      46             :                           const TargetMachine &TM) const override;
      47             : 
      48             :   void emitPersonalityValue(MCStreamer &Streamer, const DataLayout &TM,
      49             :                             const MCSymbol *Sym) const override;
      50             : 
      51             :   /// Given a constant with the SectionKind, return a section that it should be
      52             :   /// placed in.
      53             :   MCSection *getSectionForConstant(const DataLayout &DL, SectionKind Kind,
      54             :                                    const Constant *C,
      55             :                                    unsigned &Align) const override;
      56             : 
      57             :   MCSection *getExplicitSectionGlobal(const GlobalObject *GO, SectionKind Kind,
      58             :                                       const TargetMachine &TM) const override;
      59             : 
      60             :   MCSection *SelectSectionForGlobal(const GlobalObject *GO, SectionKind Kind,
      61             :                                     const TargetMachine &TM) const override;
      62             : 
      63             :   MCSection *getSectionForJumpTable(const Function &F,
      64             :                                     const TargetMachine &TM) const override;
      65             : 
      66             :   bool shouldPutJumpTableInFunctionSection(bool UsesLabelDifference,
      67             :                                            const Function &F) const override;
      68             : 
      69             :   /// Return an MCExpr to use for a reference to the specified type info global
      70             :   /// variable from exception handling information.
      71             :   const MCExpr *getTTypeGlobalReference(const GlobalValue *GV,
      72             :                                         unsigned Encoding,
      73             :                                         const TargetMachine &TM,
      74             :                                         MachineModuleInfo *MMI,
      75             :                                         MCStreamer &Streamer) const override;
      76             : 
      77             :   // The symbol that gets passed to .cfi_personality.
      78             :   MCSymbol *getCFIPersonalitySymbol(const GlobalValue *GV,
      79             :                                     const TargetMachine &TM,
      80             :                                     MachineModuleInfo *MMI) const override;
      81             : 
      82             :   void InitializeELF(bool UseInitArray_);
      83             :   MCSection *getStaticCtorSection(unsigned Priority,
      84             :                                   const MCSymbol *KeySym) const override;
      85             :   MCSection *getStaticDtorSection(unsigned Priority,
      86             :                                   const MCSymbol *KeySym) const override;
      87             : 
      88             :   const MCExpr *lowerRelativeReference(const GlobalValue *LHS,
      89             :                                        const GlobalValue *RHS,
      90             :                                        const TargetMachine &TM) const override;
      91             : };
      92             : 
      93             : class TargetLoweringObjectFileMachO : public TargetLoweringObjectFile {
      94             : public:
      95             :   TargetLoweringObjectFileMachO();
      96        4517 :   ~TargetLoweringObjectFileMachO() override = default;
      97             : 
      98             :   void Initialize(MCContext &Ctx, const TargetMachine &TM) override;
      99             : 
     100             :   /// Emit the module flags that specify the garbage collection information.
     101             :   void emitModuleMetadata(MCStreamer &Streamer, Module &M,
     102             :                           const TargetMachine &TM) const override;
     103             : 
     104             :   MCSection *SelectSectionForGlobal(const GlobalObject *GO, SectionKind Kind,
     105             :                                     const TargetMachine &TM) const override;
     106             : 
     107             :   MCSection *getExplicitSectionGlobal(const GlobalObject *GO, SectionKind Kind,
     108             :                                       const TargetMachine &TM) const override;
     109             : 
     110             :   MCSection *getSectionForConstant(const DataLayout &DL, SectionKind Kind,
     111             :                                    const Constant *C,
     112             :                                    unsigned &Align) const override;
     113             : 
     114             :   /// The mach-o version of this method defaults to returning a stub reference.
     115             :   const MCExpr *getTTypeGlobalReference(const GlobalValue *GV,
     116             :                                         unsigned Encoding,
     117             :                                         const TargetMachine &TM,
     118             :                                         MachineModuleInfo *MMI,
     119             :                                         MCStreamer &Streamer) const override;
     120             : 
     121             :   // The symbol that gets passed to .cfi_personality.
     122             :   MCSymbol *getCFIPersonalitySymbol(const GlobalValue *GV,
     123             :                                     const TargetMachine &TM,
     124             :                                     MachineModuleInfo *MMI) const override;
     125             : 
     126             :   /// Get MachO PC relative GOT entry relocation
     127             :   const MCExpr *getIndirectSymViaGOTPCRel(const MCSymbol *Sym,
     128             :                                           const MCValue &MV, int64_t Offset,
     129             :                                           MachineModuleInfo *MMI,
     130             :                                           MCStreamer &Streamer) const override;
     131             : 
     132             :   void getNameWithPrefix(SmallVectorImpl<char> &OutName, const GlobalValue *GV,
     133             :                          const TargetMachine &TM) const override;
     134             : };
     135             : 
     136        2400 : class TargetLoweringObjectFileCOFF : public TargetLoweringObjectFile {
     137             :   mutable unsigned NextUniqueID = 0;
     138             : 
     139             : public:
     140        1189 :   ~TargetLoweringObjectFileCOFF() override = default;
     141             : 
     142             :   void Initialize(MCContext &Ctx, const TargetMachine &TM) override;
     143             :   MCSection *getExplicitSectionGlobal(const GlobalObject *GO, SectionKind Kind,
     144             :                                       const TargetMachine &TM) const override;
     145             : 
     146             :   MCSection *SelectSectionForGlobal(const GlobalObject *GO, SectionKind Kind,
     147             :                                     const TargetMachine &TM) const override;
     148             : 
     149             :   void getNameWithPrefix(SmallVectorImpl<char> &OutName, const GlobalValue *GV,
     150             :                          const TargetMachine &TM) const override;
     151             : 
     152             :   MCSection *getSectionForJumpTable(const Function &F,
     153             :                                     const TargetMachine &TM) const override;
     154             : 
     155             :   /// Emit Obj-C garbage collection and linker options.
     156             :   void emitModuleMetadata(MCStreamer &Streamer, Module &M,
     157             :                           const TargetMachine &TM) const override;
     158             : 
     159             :   MCSection *getStaticCtorSection(unsigned Priority,
     160             :                                   const MCSymbol *KeySym) const override;
     161             :   MCSection *getStaticDtorSection(unsigned Priority,
     162             :                                   const MCSymbol *KeySym) const override;
     163             : 
     164             :   void emitLinkerFlagsForGlobal(raw_ostream &OS,
     165             :                                 const GlobalValue *GV) const override;
     166             : };
     167             : 
     168             : class TargetLoweringObjectFileWasm : public TargetLoweringObjectFile {
     169             :   mutable unsigned NextUniqueID = 0;
     170             : 
     171             : public:
     172             :   TargetLoweringObjectFileWasm() = default;
     173           0 :   ~TargetLoweringObjectFileWasm() override = default;
     174             : 
     175             :   MCSection *getExplicitSectionGlobal(const GlobalObject *GO, SectionKind Kind,
     176             :                                       const TargetMachine &TM) const override;
     177             : 
     178             :   MCSection *SelectSectionForGlobal(const GlobalObject *GO, SectionKind Kind,
     179             :                                     const TargetMachine &TM) const override;
     180             : 
     181             :   bool shouldPutJumpTableInFunctionSection(bool UsesLabelDifference,
     182             :                                            const Function &F) const override;
     183             : 
     184             :   void InitializeWasm();
     185             : 
     186             :   const MCExpr *lowerRelativeReference(const GlobalValue *LHS,
     187             :                                        const GlobalValue *RHS,
     188             :                                        const TargetMachine &TM) const override;
     189             : };
     190             : 
     191             : } // end namespace llvm
     192             : 
     193             : #endif // LLVM_CODEGEN_TARGETLOWERINGOBJECTFILEIMPL_H

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