#define LLVM_MC_MCASSEMBLER_H
#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/DenseSet.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/ilist.h"
#include "llvm/ADT/ilist_node.h"
+#include "llvm/ADT/iterator.h"
+#include "llvm/MC/MCDirectives.h"
#include "llvm/MC/MCFixup.h"
#include "llvm/MC/MCInst.h"
+#include "llvm/MC/MCLinkerOptimizationHint.h"
+#include "llvm/MC/MCSubtargetInfo.h"
+#include "llvm/MC/MCSymbol.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/DataTypes.h"
+#include <algorithm>
#include <vector> // FIXME: Shouldn't be needed.
namespace llvm {
class MCObjectWriter;
class MCSection;
class MCSectionData;
-class MCSymbol;
-class MCSymbolData;
+class MCSubtargetInfo;
class MCValue;
class MCAsmBackend;
class MCFragment : public ilist_node<MCFragment> {
friend class MCAsmLayout;
- MCFragment(const MCFragment&) LLVM_DELETED_FUNCTION;
- void operator=(const MCFragment&) LLVM_DELETED_FUNCTION;
+ MCFragment(const MCFragment &) = delete;
+ void operator=(const MCFragment &) = delete;
public:
enum FragmentType {
FT_Align,
FT_Data,
+ FT_CompactEncodedInst,
FT_Fill,
- FT_Inst,
+ FT_Relaxable,
FT_Org,
FT_Dwarf,
FT_DwarfFrame,
MCSectionData *Parent;
/// Atom - The atom this fragment is in, as represented by it's defining
- /// symbol. Atom's are only used by backends which set
- /// \see MCAsmBackend::hasReliableSymbolDifference().
- MCSymbolData *Atom;
+ /// symbol.
+ const MCSymbol *Atom;
- /// @name Assembler Backend Data
+ /// \name Assembler Backend Data
/// @{
//
// FIXME: This could all be kept private to the assembler implementation.
/// @}
protected:
- MCFragment(FragmentType _Kind, MCSectionData *_Parent = 0);
+ MCFragment(FragmentType Kind, MCSectionData *Parent = nullptr);
public:
// Only for sentinel.
MCSectionData *getParent() const { return Parent; }
void setParent(MCSectionData *Value) { Parent = Value; }
- MCSymbolData *getAtom() const { return Atom; }
- void setAtom(MCSymbolData *Value) { Atom = Value; }
+ const MCSymbol *getAtom() const { return Atom; }
+ void setAtom(const MCSymbol *Value) { Atom = Value; }
unsigned getLayoutOrder() const { return LayoutOrder; }
void setLayoutOrder(unsigned Value) { LayoutOrder = Value; }
+ /// \brief Does this fragment have instructions emitted into it? By default
+ /// this is false, but specific fragment types may set it to true.
+ virtual bool hasInstructions() const { return false; }
+
+ /// \brief Should this fragment be placed at the end of an aligned bundle?
+ virtual bool alignToBundleEnd() const { return false; }
+ virtual void setAlignToBundleEnd(bool V) {}
+
+ /// \brief Get the padding size that must be inserted before this fragment.
+ /// Used for bundling. By default, no padding is inserted.
+ /// Note that padding size is restricted to 8 bits. This is an optimization
+ /// to reduce the amount of space used for each fragment. In practice, larger
+ /// padding should never be required.
+ virtual uint8_t getBundlePadding() const { return 0; }
+
+ /// \brief Set the padding size for this fragment. By default it's a no-op,
+ /// and only some fragments have a meaningful implementation.
+ virtual void setBundlePadding(uint8_t N) {}
+
void dump();
};
+/// Interface implemented by fragments that contain encoded instructions and/or
+/// data.
+///
class MCEncodedFragment : public MCFragment {
virtual void anchor();
+
+ uint8_t BundlePadding;
+
public:
- MCEncodedFragment(MCFragment::FragmentType FType, MCSectionData *SD = 0)
- : MCFragment(FType, SD) {
+ MCEncodedFragment(MCFragment::FragmentType FType, MCSectionData *SD = nullptr)
+ : MCFragment(FType, SD), BundlePadding(0) {}
+ ~MCEncodedFragment() override;
+
+ virtual SmallVectorImpl<char> &getContents() = 0;
+ virtual const SmallVectorImpl<char> &getContents() const = 0;
+
+ uint8_t getBundlePadding() const override { return BundlePadding; }
+
+ void setBundlePadding(uint8_t N) override { BundlePadding = N; }
+
+ static bool classof(const MCFragment *F) {
+ MCFragment::FragmentType Kind = F->getKind();
+ switch (Kind) {
+ default:
+ return false;
+ case MCFragment::FT_Relaxable:
+ case MCFragment::FT_CompactEncodedInst:
+ case MCFragment::FT_Data:
+ return true;
+ }
}
- virtual ~MCEncodedFragment();
+};
+
+/// Interface implemented by fragments that contain encoded instructions and/or
+/// data and also have fixups registered.
+///
+class MCEncodedFragmentWithFixups : public MCEncodedFragment {
+ void anchor() override;
+
+public:
+ MCEncodedFragmentWithFixups(MCFragment::FragmentType FType,
+ MCSectionData *SD = nullptr)
+ : MCEncodedFragment(FType, SD) {}
+
+ ~MCEncodedFragmentWithFixups() override;
typedef SmallVectorImpl<MCFixup>::const_iterator const_fixup_iterator;
typedef SmallVectorImpl<MCFixup>::iterator fixup_iterator;
- virtual SmallVectorImpl<char> &getContents() = 0;
- virtual const SmallVectorImpl<char> &getContents() const = 0;
-
virtual SmallVectorImpl<MCFixup> &getFixups() = 0;
virtual const SmallVectorImpl<MCFixup> &getFixups() const = 0;
virtual fixup_iterator fixup_begin() = 0;
- virtual const_fixup_iterator fixup_begin() const = 0;
+ virtual const_fixup_iterator fixup_begin() const = 0;
virtual fixup_iterator fixup_end() = 0;
virtual const_fixup_iterator fixup_end() const = 0;
static bool classof(const MCFragment *F) {
MCFragment::FragmentType Kind = F->getKind();
- return Kind == MCFragment::FT_Inst || Kind == MCFragment::FT_Data;
+ return Kind == MCFragment::FT_Relaxable || Kind == MCFragment::FT_Data;
}
};
-class MCDataFragment : public MCEncodedFragment {
- virtual void anchor();
+/// Fragment for data and encoded instructions.
+///
+class MCDataFragment : public MCEncodedFragmentWithFixups {
+ void anchor() override;
+
+ /// \brief Does this fragment contain encoded instructions anywhere in it?
+ bool HasInstructions;
+
+ /// \brief Should this fragment be aligned to the end of a bundle?
+ bool AlignToBundleEnd;
+
SmallVector<char, 32> Contents;
/// Fixups - The list of fixups in this fragment.
SmallVector<MCFixup, 4> Fixups;
public:
- MCDataFragment(MCSectionData *SD = 0)
- : MCEncodedFragment(FT_Data, SD) {
- }
+ MCDataFragment(MCSectionData *SD = nullptr)
+ : MCEncodedFragmentWithFixups(FT_Data, SD), HasInstructions(false),
+ AlignToBundleEnd(false) {}
- virtual SmallVectorImpl<char> &getContents() { return Contents; }
- virtual const SmallVectorImpl<char> &getContents() const { return Contents; }
+ SmallVectorImpl<char> &getContents() override { return Contents; }
+ const SmallVectorImpl<char> &getContents() const override { return Contents; }
- SmallVectorImpl<MCFixup> &getFixups() {
- return Fixups;
- }
+ SmallVectorImpl<MCFixup> &getFixups() override { return Fixups; }
- const SmallVectorImpl<MCFixup> &getFixups() const {
- return Fixups;
- }
+ const SmallVectorImpl<MCFixup> &getFixups() const override { return Fixups; }
+
+ bool hasInstructions() const override { return HasInstructions; }
+ virtual void setHasInstructions(bool V) { HasInstructions = V; }
+
+ bool alignToBundleEnd() const override { return AlignToBundleEnd; }
+ void setAlignToBundleEnd(bool V) override { AlignToBundleEnd = V; }
- fixup_iterator fixup_begin() { return Fixups.begin(); }
- const_fixup_iterator fixup_begin() const { return Fixups.begin(); }
+ fixup_iterator fixup_begin() override { return Fixups.begin(); }
+ const_fixup_iterator fixup_begin() const override { return Fixups.begin(); }
- fixup_iterator fixup_end() {return Fixups.end();}
- const_fixup_iterator fixup_end() const {return Fixups.end();}
+ fixup_iterator fixup_end() override { return Fixups.end(); }
+ const_fixup_iterator fixup_end() const override { return Fixups.end(); }
static bool classof(const MCFragment *F) {
return F->getKind() == MCFragment::FT_Data;
}
};
-class MCInstFragment : public MCEncodedFragment {
- virtual void anchor();
+/// This is a compact (memory-size-wise) fragment for holding an encoded
+/// instruction (non-relaxable) that has no fixups registered. When applicable,
+/// it can be used instead of MCDataFragment and lead to lower memory
+/// consumption.
+///
+class MCCompactEncodedInstFragment : public MCEncodedFragment {
+ void anchor() override;
+
+ /// \brief Should this fragment be aligned to the end of a bundle?
+ bool AlignToBundleEnd;
+
+ SmallVector<char, 4> Contents;
+
+public:
+ MCCompactEncodedInstFragment(MCSectionData *SD = nullptr)
+ : MCEncodedFragment(FT_CompactEncodedInst, SD), AlignToBundleEnd(false) {}
+
+ bool hasInstructions() const override { return true; }
+
+ SmallVectorImpl<char> &getContents() override { return Contents; }
+ const SmallVectorImpl<char> &getContents() const override { return Contents; }
+
+ bool alignToBundleEnd() const override { return AlignToBundleEnd; }
+ void setAlignToBundleEnd(bool V) override { AlignToBundleEnd = V; }
+
+ static bool classof(const MCFragment *F) {
+ return F->getKind() == MCFragment::FT_CompactEncodedInst;
+ }
+};
+
+/// A relaxable fragment holds on to its MCInst, since it may need to be
+/// relaxed during the assembler layout and relaxation stage.
+///
+class MCRelaxableFragment : public MCEncodedFragmentWithFixups {
+ void anchor() override;
/// Inst - The instruction this is a fragment for.
MCInst Inst;
+ /// STI - The MCSubtargetInfo in effect when the instruction was encoded.
+ /// Keep a copy instead of a reference to make sure that updates to STI
+ /// in the assembler are not seen here.
+ const MCSubtargetInfo STI;
+
/// Contents - Binary data for the currently encoded instruction.
SmallVector<char, 8> Contents;
SmallVector<MCFixup, 1> Fixups;
public:
- MCInstFragment(const MCInst &_Inst, MCSectionData *SD = 0)
- : MCEncodedFragment(FT_Inst, SD), Inst(_Inst) {
- }
+ MCRelaxableFragment(const MCInst &Inst, const MCSubtargetInfo &STI,
+ MCSectionData *SD = nullptr)
+ : MCEncodedFragmentWithFixups(FT_Relaxable, SD), Inst(Inst), STI(STI) {}
- virtual SmallVectorImpl<char> &getContents() { return Contents; }
- virtual const SmallVectorImpl<char> &getContents() const { return Contents; }
+ SmallVectorImpl<char> &getContents() override { return Contents; }
+ const SmallVectorImpl<char> &getContents() const override { return Contents; }
- unsigned getInstSize() const { return Contents.size(); }
const MCInst &getInst() const { return Inst; }
- void setInst(const MCInst& Value) { Inst = Value; }
+ void setInst(const MCInst &Value) { Inst = Value; }
- SmallVectorImpl<MCFixup> &getFixups() {
- return Fixups;
- }
+ const MCSubtargetInfo &getSubtargetInfo() { return STI; }
- const SmallVectorImpl<MCFixup> &getFixups() const {
- return Fixups;
- }
+ SmallVectorImpl<MCFixup> &getFixups() override { return Fixups; }
+
+ const SmallVectorImpl<MCFixup> &getFixups() const override { return Fixups; }
+
+ bool hasInstructions() const override { return true; }
- fixup_iterator fixup_begin() { return Fixups.begin(); }
- const_fixup_iterator fixup_begin() const { return Fixups.begin(); }
+ fixup_iterator fixup_begin() override { return Fixups.begin(); }
+ const_fixup_iterator fixup_begin() const override { return Fixups.begin(); }
- fixup_iterator fixup_end() {return Fixups.end();}
- const_fixup_iterator fixup_end() const {return Fixups.end();}
+ fixup_iterator fixup_end() override { return Fixups.end(); }
+ const_fixup_iterator fixup_end() const override { return Fixups.end(); }
static bool classof(const MCFragment *F) {
- return F->getKind() == MCFragment::FT_Inst;
+ return F->getKind() == MCFragment::FT_Relaxable;
}
};
bool EmitNops : 1;
public:
- MCAlignFragment(unsigned _Alignment, int64_t _Value, unsigned _ValueSize,
- unsigned _MaxBytesToEmit, MCSectionData *SD = 0)
- : MCFragment(FT_Align, SD), Alignment(_Alignment),
- Value(_Value),ValueSize(_ValueSize),
- MaxBytesToEmit(_MaxBytesToEmit), EmitNops(false) {}
+ MCAlignFragment(unsigned Alignment, int64_t Value, unsigned ValueSize,
+ unsigned MaxBytesToEmit, MCSectionData *SD = nullptr)
+ : MCFragment(FT_Align, SD), Alignment(Alignment), Value(Value),
+ ValueSize(ValueSize), MaxBytesToEmit(MaxBytesToEmit), EmitNops(false) {}
- /// @name Accessors
+ /// \name Accessors
/// @{
unsigned getAlignment() const { return Alignment; }
uint64_t Size;
public:
- MCFillFragment(int64_t _Value, unsigned _ValueSize, uint64_t _Size,
- MCSectionData *SD = 0)
- : MCFragment(FT_Fill, SD),
- Value(_Value), ValueSize(_ValueSize), Size(_Size) {
+ MCFillFragment(int64_t Value, unsigned ValueSize, uint64_t Size,
+ MCSectionData *SD = nullptr)
+ : MCFragment(FT_Fill, SD), Value(Value), ValueSize(ValueSize),
+ Size(Size) {
assert((!ValueSize || (Size % ValueSize) == 0) &&
"Fill size must be a multiple of the value size!");
}
- /// @name Accessors
+ /// \name Accessors
/// @{
int64_t getValue() const { return Value; }
int8_t Value;
public:
- MCOrgFragment(const MCExpr &_Offset, int8_t _Value, MCSectionData *SD = 0)
- : MCFragment(FT_Org, SD),
- Offset(&_Offset), Value(_Value) {}
+ MCOrgFragment(const MCExpr &Offset, int8_t Value, MCSectionData *SD = nullptr)
+ : MCFragment(FT_Org, SD), Offset(&Offset), Value(Value) {}
- /// @name Accessors
+ /// \name Accessors
/// @{
const MCExpr &getOffset() const { return *Offset; }
bool IsSigned;
SmallString<8> Contents;
+
public:
- MCLEBFragment(const MCExpr &Value_, bool IsSigned_, MCSectionData *SD)
- : MCFragment(FT_LEB, SD),
- Value(&Value_), IsSigned(IsSigned_) { Contents.push_back(0); }
+ MCLEBFragment(const MCExpr &Value_, bool IsSigned_,
+ MCSectionData *SD = nullptr)
+ : MCFragment(FT_LEB, SD), Value(&Value_), IsSigned(IsSigned_) {
+ Contents.push_back(0);
+ }
- /// @name Accessors
+ /// \name Accessors
/// @{
const MCExpr &getValue() const { return *Value; }
SmallString<8> Contents;
public:
- MCDwarfLineAddrFragment(int64_t _LineDelta, const MCExpr &_AddrDelta,
- MCSectionData *SD)
- : MCFragment(FT_Dwarf, SD),
- LineDelta(_LineDelta), AddrDelta(&_AddrDelta) { Contents.push_back(0); }
+ MCDwarfLineAddrFragment(int64_t LineDelta, const MCExpr &AddrDelta,
+ MCSectionData *SD = nullptr)
+ : MCFragment(FT_Dwarf, SD), LineDelta(LineDelta), AddrDelta(&AddrDelta) {
+ Contents.push_back(0);
+ }
- /// @name Accessors
+ /// \name Accessors
/// @{
int64_t getLineDelta() const { return LineDelta; }
SmallString<8> Contents;
public:
- MCDwarfCallFrameFragment(const MCExpr &_AddrDelta, MCSectionData *SD)
- : MCFragment(FT_DwarfFrame, SD),
- AddrDelta(&_AddrDelta) { Contents.push_back(0); }
+ MCDwarfCallFrameFragment(const MCExpr &AddrDelta, MCSectionData *SD = nullptr)
+ : MCFragment(FT_DwarfFrame, SD), AddrDelta(&AddrDelta) {
+ Contents.push_back(0);
+ }
- /// @name Accessors
+ /// \name Accessors
/// @{
const MCExpr &getAddrDelta() const { return *AddrDelta; }
class MCSectionData : public ilist_node<MCSectionData> {
friend class MCAsmLayout;
- MCSectionData(const MCSectionData&) LLVM_DELETED_FUNCTION;
- void operator=(const MCSectionData&) LLVM_DELETED_FUNCTION;
+ MCSectionData(const MCSectionData &) = delete;
+ void operator=(const MCSectionData &) = delete;
public:
typedef iplist<MCFragment> FragmentListType;
typedef FragmentListType::const_reverse_iterator const_reverse_iterator;
typedef FragmentListType::reverse_iterator reverse_iterator;
+ /// \brief Express the state of bundle locked groups while emitting code.
+ enum BundleLockStateType {
+ NotBundleLocked,
+ BundleLocked,
+ BundleLockedAlignToEnd
+ };
+
private:
FragmentListType Fragments;
- const MCSection *Section;
+ MCSection *Section;
/// Ordinal - The section index in the assemblers section list.
unsigned Ordinal;
/// LayoutOrder - The index of this section in the layout order.
unsigned LayoutOrder;
- /// Alignment - The maximum alignment seen in this section.
- unsigned Alignment;
+ /// \brief Keeping track of bundle-locked state.
+ BundleLockStateType BundleLockState;
- /// @name Assembler Backend Data
+ /// \brief Current nesting depth of bundle_lock directives.
+ unsigned BundleLockNestingDepth;
+
+ /// \brief We've seen a bundle_lock directive but not its first instruction
+ /// yet.
+ bool BundleGroupBeforeFirstInst;
+
+ /// \name Assembler Backend Data
/// @{
//
// FIXME: This could all be kept private to the assembler implementation.
/// it.
unsigned HasInstructions : 1;
+ /// Mapping from subsection number to insertion point for subsection numbers
+ /// below that number.
+ SmallVector<std::pair<unsigned, MCFragment *>, 1> SubsectionFragmentMap;
+
/// @}
public:
// Only for use as sentinel.
MCSectionData();
- MCSectionData(const MCSection &Section, MCAssembler *A = 0);
+ MCSectionData(MCSection &Section, MCAssembler *A = nullptr);
- const MCSection &getSection() const { return *Section; }
-
- unsigned getAlignment() const { return Alignment; }
- void setAlignment(unsigned Value) { Alignment = Value; }
+ MCSection &getSection() const { return *Section; }
bool hasInstructions() const { return HasInstructions; }
void setHasInstructions(bool Value) { HasInstructions = Value; }
unsigned getLayoutOrder() const { return LayoutOrder; }
void setLayoutOrder(unsigned Value) { LayoutOrder = Value; }
- /// @name Fragment Access
+ /// \name Fragment Access
/// @{
const FragmentListType &getFragmentList() const { return Fragments; }
bool empty() const { return Fragments.empty(); }
- void dump();
-
- /// @}
-};
-
-// FIXME: Same concerns as with SectionData.
-class MCSymbolData : public ilist_node<MCSymbolData> {
-public:
- const MCSymbol *Symbol;
-
- /// Fragment - The fragment this symbol's value is relative to, if any.
- MCFragment *Fragment;
-
- /// Offset - The offset to apply to the fragment address to form this symbol's
- /// value.
- uint64_t Offset;
-
- /// IsExternal - True if this symbol is visible outside this translation
- /// unit.
- unsigned IsExternal : 1;
+ iterator getSubsectionInsertionPoint(unsigned Subsection);
- /// IsPrivateExtern - True if this symbol is private extern.
- unsigned IsPrivateExtern : 1;
+ bool isBundleLocked() const { return BundleLockState != NotBundleLocked; }
- /// CommonSize - The size of the symbol, if it is 'common', or 0.
- //
- // FIXME: Pack this in with other fields? We could put it in offset, since a
- // common symbol can never get a definition.
- uint64_t CommonSize;
-
- /// SymbolSize - An expression describing how to calculate the size of
- /// a symbol. If a symbol has no size this field will be NULL.
- const MCExpr *SymbolSize;
-
- /// CommonAlign - The alignment of the symbol, if it is 'common'.
- //
- // FIXME: Pack this in with other fields?
- unsigned CommonAlign;
-
- /// Flags - The Flags field is used by object file implementations to store
- /// additional per symbol information which is not easily classified.
- uint32_t Flags;
+ BundleLockStateType getBundleLockState() const { return BundleLockState; }
- /// Index - Index field, for use by the object file implementation.
- uint64_t Index;
-
-public:
- // Only for use as sentinel.
- MCSymbolData();
- MCSymbolData(const MCSymbol &_Symbol, MCFragment *_Fragment, uint64_t _Offset,
- MCAssembler *A = 0);
-
- /// @name Accessors
- /// @{
+ void setBundleLockState(BundleLockStateType NewState);
- const MCSymbol &getSymbol() const { return *Symbol; }
-
- MCFragment *getFragment() const { return Fragment; }
- void setFragment(MCFragment *Value) { Fragment = Value; }
-
- uint64_t getOffset() const { return Offset; }
- void setOffset(uint64_t Value) { Offset = Value; }
-
- /// @}
- /// @name Symbol Attributes
- /// @{
-
- bool isExternal() const { return IsExternal; }
- void setExternal(bool Value) { IsExternal = Value; }
-
- bool isPrivateExtern() const { return IsPrivateExtern; }
- void setPrivateExtern(bool Value) { IsPrivateExtern = Value; }
-
- /// isCommon - Is this a 'common' symbol.
- bool isCommon() const { return CommonSize != 0; }
-
- /// setCommon - Mark this symbol as being 'common'.
- ///
- /// \param Size - The size of the symbol.
- /// \param Align - The alignment of the symbol.
- void setCommon(uint64_t Size, unsigned Align) {
- CommonSize = Size;
- CommonAlign = Align;
+ bool isBundleGroupBeforeFirstInst() const {
+ return BundleGroupBeforeFirstInst;
}
- /// getCommonSize - Return the size of a 'common' symbol.
- uint64_t getCommonSize() const {
- assert(isCommon() && "Not a 'common' symbol!");
- return CommonSize;
- }
-
- void setSize(const MCExpr *SS) {
- SymbolSize = SS;
- }
-
- const MCExpr *getSize() const {
- return SymbolSize;
- }
-
-
- /// getCommonAlignment - Return the alignment of a 'common' symbol.
- unsigned getCommonAlignment() const {
- assert(isCommon() && "Not a 'common' symbol!");
- return CommonAlign;
- }
-
- /// getFlags - Get the (implementation defined) symbol flags.
- uint32_t getFlags() const { return Flags; }
-
- /// setFlags - Set the (implementation defined) symbol flags.
- void setFlags(uint32_t Value) { Flags = Value; }
-
- /// modifyFlags - Modify the flags via a mask
- void modifyFlags(uint32_t Value, uint32_t Mask) {
- Flags = (Flags & ~Mask) | Value;
+ void setBundleGroupBeforeFirstInst(bool IsFirst) {
+ BundleGroupBeforeFirstInst = IsFirst;
}
- /// getIndex - Get the (implementation defined) index.
- uint64_t getIndex() const { return Index; }
-
- /// setIndex - Set the (implementation defined) index.
- void setIndex(uint64_t Value) { Index = Value; }
+ void dump();
/// @}
-
- void dump();
};
// FIXME: This really doesn't belong here. See comments below.
public:
typedef iplist<MCSectionData> SectionDataListType;
- typedef iplist<MCSymbolData> SymbolDataListType;
+ typedef std::vector<const MCSymbol *> SymbolDataListType;
typedef SectionDataListType::const_iterator const_iterator;
typedef SectionDataListType::iterator iterator;
- typedef SymbolDataListType::const_iterator const_symbol_iterator;
- typedef SymbolDataListType::iterator symbol_iterator;
+ typedef pointee_iterator<SymbolDataListType::const_iterator>
+ const_symbol_iterator;
+ typedef pointee_iterator<SymbolDataListType::iterator> symbol_iterator;
+
+ typedef iterator_range<symbol_iterator> symbol_range;
+ typedef iterator_range<const_symbol_iterator> const_symbol_range;
+
+ typedef std::vector<std::string> FileNameVectorType;
+ typedef FileNameVectorType::const_iterator const_file_name_iterator;
typedef std::vector<IndirectSymbolData>::const_iterator
- const_indirect_symbol_iterator;
+ const_indirect_symbol_iterator;
typedef std::vector<IndirectSymbolData>::iterator indirect_symbol_iterator;
typedef std::vector<DataRegionData>::const_iterator
- const_data_region_iterator;
+ const_data_region_iterator;
typedef std::vector<DataRegionData>::iterator data_region_iterator;
+ /// MachO specific deployment target version info.
+ // A Major version of 0 indicates that no version information was supplied
+ // and so the corresponding load command should not be emitted.
+ typedef struct {
+ MCVersionMinType Kind;
+ unsigned Major;
+ unsigned Minor;
+ unsigned Update;
+ } VersionMinInfoType;
+
private:
- MCAssembler(const MCAssembler&) LLVM_DELETED_FUNCTION;
- void operator=(const MCAssembler&) LLVM_DELETED_FUNCTION;
+ MCAssembler(const MCAssembler &) = delete;
+ void operator=(const MCAssembler &) = delete;
MCContext &Context;
iplist<MCSectionData> Sections;
- iplist<MCSymbolData> Symbols;
+ SymbolDataListType Symbols;
- /// The map of sections to their associated assembler backend data.
- //
- // FIXME: Avoid this indirection?
- DenseMap<const MCSection*, MCSectionData*> SectionMap;
+ DenseSet<const MCSymbol *> LocalsUsedInReloc;
- /// The map of symbols to their associated assembler backend data.
+ /// The map of sections to their associated assembler backend data.
//
// FIXME: Avoid this indirection?
- DenseMap<const MCSymbol*, MCSymbolData*> SymbolMap;
+ DenseMap<const MCSection *, MCSectionData *> SectionMap;
std::vector<IndirectSymbolData> IndirectSymbols;
std::vector<DataRegionData> DataRegions;
+
+ /// The list of linker options to propagate into the object file.
+ std::vector<std::vector<std::string>> LinkerOptions;
+
+ /// List of declared file names
+ FileNameVectorType FileNames;
+
/// The set of function symbols for which a .thumb_func directive has
/// been seen.
//
// here. Maybe when the relocation stuff moves to target specific,
// this can go with it? The streamer would need some target specific
// refactoring too.
- SmallPtrSet<const MCSymbol*, 64> ThumbFuncs;
+ mutable SmallPtrSet<const MCSymbol *, 64> ThumbFuncs;
+
+ /// \brief The bundle alignment size currently set in the assembler.
+ ///
+ /// By default it's 0, which means bundling is disabled.
+ unsigned BundleAlignSize;
unsigned RelaxAll : 1;
- unsigned NoExecStack : 1;
unsigned SubsectionsViaSymbols : 1;
+ /// ELF specific e_header flags
+ // It would be good if there were an MCELFAssembler class to hold this.
+ // ELF header flags are used both by the integrated and standalone assemblers.
+ // Access to the flags is necessary in cases where assembler directives affect
+ // which flags to be set.
+ unsigned ELFHeaderEFlags;
+
+ /// Used to communicate Linker Optimization Hint information between
+ /// the Streamer and the .o writer
+ MCLOHContainer LOHContainer;
+
+ VersionMinInfoType VersionMinInfo;
+
private:
/// Evaluate a fixup to a relocatable expression and the value which should be
/// placed into the fixup.
/// \return Whether the fixup value was fully resolved. This is true if the
/// \p Value result is fixed, otherwise the value may change due to
/// relocation.
- bool evaluateFixup(const MCAsmLayout &Layout,
- const MCFixup &Fixup, const MCFragment *DF,
- MCValue &Target, uint64_t &Value) const;
+ bool evaluateFixup(const MCAsmLayout &Layout, const MCFixup &Fixup,
+ const MCFragment *DF, MCValue &Target,
+ uint64_t &Value) const;
/// Check whether a fixup can be satisfied, or whether it needs to be relaxed
/// (increased in size, in order to hold its value correctly).
- bool fixupNeedsRelaxation(const MCFixup &Fixup, const MCInstFragment *DF,
+ bool fixupNeedsRelaxation(const MCFixup &Fixup, const MCRelaxableFragment *DF,
const MCAsmLayout &Layout) const;
/// Check whether the given fragment needs relaxation.
- bool fragmentNeedsRelaxation(const MCInstFragment *IF,
+ bool fragmentNeedsRelaxation(const MCRelaxableFragment *IF,
const MCAsmLayout &Layout) const;
/// \brief Perform one layout iteration and return true if any offsets
/// if any offsets were adjusted.
bool layoutSectionOnce(MCAsmLayout &Layout, MCSectionData &SD);
- bool relaxInstruction(MCAsmLayout &Layout, MCInstFragment &IF);
+ bool relaxInstruction(MCAsmLayout &Layout, MCRelaxableFragment &IF);
bool relaxLEB(MCAsmLayout &Layout, MCLEBFragment &IF);
/// finishLayout - Finalize a layout, including fragment lowering.
void finishLayout(MCAsmLayout &Layout);
- uint64_t handleFixup(const MCAsmLayout &Layout,
- MCFragment &F, const MCFixup &Fixup);
+ std::pair<uint64_t, bool> handleFixup(const MCAsmLayout &Layout,
+ MCFragment &F, const MCFixup &Fixup);
public:
+ void addLocalUsedInReloc(const MCSymbol &Sym);
+ bool isLocalUsedInReloc(const MCSymbol &Sym) const;
+
/// Compute the effective fragment size assuming it is laid out at the given
/// \p SectionAddress and \p FragmentOffset.
uint64_t computeFragmentSize(const MCAsmLayout &Layout,
/// Find the symbol which defines the atom containing the given symbol, or
/// null if there is no such symbol.
- const MCSymbolData *getAtom(const MCSymbolData *Symbol) const;
+ const MCSymbol *getAtom(const MCSymbol &S) const;
/// Check whether a particular symbol is visible to the linker and is required
/// in the symbol table, or whether it can be discarded by the assembler. This
const MCAsmLayout &Layout) const;
/// Check whether a given symbol has been flagged with .thumb_func.
- bool isThumbFunc(const MCSymbol *Func) const {
- return ThumbFuncs.count(Func);
- }
+ bool isThumbFunc(const MCSymbol *Func) const;
/// Flag a function symbol as the target of a .thumb_func directive.
void setIsThumbFunc(const MCSymbol *Func) { ThumbFuncs.insert(Func); }
+ /// ELF e_header flags
+ unsigned getELFHeaderEFlags() const { return ELFHeaderEFlags; }
+ void setELFHeaderEFlags(unsigned Flags) { ELFHeaderEFlags = Flags; }
+
+ /// MachO deployment target version information.
+ const VersionMinInfoType &getVersionMinInfo() const { return VersionMinInfo; }
+ void setVersionMinInfo(MCVersionMinType Kind, unsigned Major, unsigned Minor,
+ unsigned Update) {
+ VersionMinInfo.Kind = Kind;
+ VersionMinInfo.Major = Major;
+ VersionMinInfo.Minor = Minor;
+ VersionMinInfo.Update = Update;
+ }
+
public:
/// Construct a new assembler instance.
///
void Finish();
// FIXME: This does not belong here.
- bool getSubsectionsViaSymbols() const {
- return SubsectionsViaSymbols;
- }
- void setSubsectionsViaSymbols(bool Value) {
- SubsectionsViaSymbols = Value;
- }
+ bool getSubsectionsViaSymbols() const { return SubsectionsViaSymbols; }
+ void setSubsectionsViaSymbols(bool Value) { SubsectionsViaSymbols = Value; }
bool getRelaxAll() const { return RelaxAll; }
void setRelaxAll(bool Value) { RelaxAll = Value; }
- bool getNoExecStack() const { return NoExecStack; }
- void setNoExecStack(bool Value) { NoExecStack = Value; }
+ bool isBundlingEnabled() const { return BundleAlignSize != 0; }
- /// @name Section List Access
+ unsigned getBundleAlignSize() const { return BundleAlignSize; }
+
+ void setBundleAlignSize(unsigned Size) {
+ assert((Size == 0 || !(Size & (Size - 1))) &&
+ "Expect a power-of-two bundle align size");
+ BundleAlignSize = Size;
+ }
+
+ /// \name Section List Access
/// @{
const SectionDataListType &getSectionList() const { return Sections; }
size_t size() const { return Sections.size(); }
/// @}
- /// @name Symbol List Access
+ /// \name Symbol List Access
/// @{
-
- const SymbolDataListType &getSymbolList() const { return Symbols; }
- SymbolDataListType &getSymbolList() { return Symbols; }
-
symbol_iterator symbol_begin() { return Symbols.begin(); }
const_symbol_iterator symbol_begin() const { return Symbols.begin(); }
symbol_iterator symbol_end() { return Symbols.end(); }
const_symbol_iterator symbol_end() const { return Symbols.end(); }
+ symbol_range symbols() { return make_range(symbol_begin(), symbol_end()); }
+ const_symbol_range symbols() const {
+ return make_range(symbol_begin(), symbol_end());
+ }
+
size_t symbol_size() const { return Symbols.size(); }
/// @}
- /// @name Indirect Symbol List Access
+ /// \name Indirect Symbol List Access
/// @{
// FIXME: This is a total hack, this should not be here. Once things are
size_t indirect_symbol_size() const { return IndirectSymbols.size(); }
/// @}
- /// @name Data Region List Access
+ /// \name Linker Option List Access
+ /// @{
+
+ std::vector<std::vector<std::string>> &getLinkerOptions() {
+ return LinkerOptions;
+ }
+
+ /// @}
+ /// \name Data Region List Access
/// @{
// FIXME: This is a total hack, this should not be here. Once things are
// factored so that the streamer has direct access to the .o writer, it can
// disappear.
- std::vector<DataRegionData> &getDataRegions() {
- return DataRegions;
- }
+ std::vector<DataRegionData> &getDataRegions() { return DataRegions; }
- data_region_iterator data_region_begin() {
- return DataRegions.begin();
- }
+ data_region_iterator data_region_begin() { return DataRegions.begin(); }
const_data_region_iterator data_region_begin() const {
return DataRegions.begin();
}
- data_region_iterator data_region_end() {
- return DataRegions.end();
- }
+ data_region_iterator data_region_end() { return DataRegions.end(); }
const_data_region_iterator data_region_end() const {
return DataRegions.end();
}
size_t data_region_size() const { return DataRegions.size(); }
/// @}
- /// @name Backend Data Access
+ /// \name Data Region List Access
+ /// @{
+
+ // FIXME: This is a total hack, this should not be here. Once things are
+ // factored so that the streamer has direct access to the .o writer, it can
+ // disappear.
+ MCLOHContainer &getLOHContainer() { return LOHContainer; }
+ const MCLOHContainer &getLOHContainer() const {
+ return const_cast<MCAssembler *>(this)->getLOHContainer();
+ }
+ /// @}
+ /// \name Backend Data Access
/// @{
MCSectionData &getSectionData(const MCSection &Section) const {
return *Entry;
}
- MCSectionData &getOrCreateSectionData(const MCSection &Section,
- bool *Created = 0) {
+ MCSectionData &getOrCreateSectionData(MCSection &Section,
+ bool *Created = nullptr) {
MCSectionData *&Entry = SectionMap[&Section];
- if (Created) *Created = !Entry;
+ if (Created)
+ *Created = !Entry;
if (!Entry)
Entry = new MCSectionData(Section, this);
return *Entry;
}
- MCSymbolData &getSymbolData(const MCSymbol &Symbol) const {
- MCSymbolData *Entry = SymbolMap.lookup(&Symbol);
- assert(Entry && "Missing symbol data!");
- return *Entry;
+ bool hasSymbolData(const MCSymbol &Symbol) const { return Symbol.hasData(); }
+
+ MCSymbolData &getSymbolData(const MCSymbol &Symbol) {
+ return const_cast<MCSymbolData &>(
+ static_cast<const MCAssembler &>(*this).getSymbolData(Symbol));
+ }
+
+ const MCSymbolData &getSymbolData(const MCSymbol &Symbol) const {
+ return Symbol.getData();
}
MCSymbolData &getOrCreateSymbolData(const MCSymbol &Symbol,
- bool *Created = 0) {
- MCSymbolData *&Entry = SymbolMap[&Symbol];
+ bool *Created = nullptr) {
+ if (Created)
+ *Created = !hasSymbolData(Symbol);
+ if (!hasSymbolData(Symbol)) {
+ Symbol.initializeData();
+ Symbols.push_back(&Symbol);
+ }
+ return Symbol.getData();
+ }
- if (Created) *Created = !Entry;
- if (!Entry)
- Entry = new MCSymbolData(Symbol, 0, 0, this);
+ const_file_name_iterator file_names_begin() const {
+ return FileNames.begin();
+ }
- return *Entry;
+ const_file_name_iterator file_names_end() const { return FileNames.end(); }
+
+ void addFileName(StringRef FileName) {
+ if (std::find(file_names_begin(), file_names_end(), FileName) ==
+ file_names_end())
+ FileNames.push_back(FileName);
}
+ /// \brief Write the necessary bundle padding to the given object writer.
+ /// Expects a fragment \p F containing instructions and its size \p FSize.
+ void writeFragmentPadding(const MCFragment &F, uint64_t FSize,
+ MCObjectWriter *OW) const;
+
/// @}
void dump();
};
+/// \brief Compute the amount of padding required before the fragment \p F to
+/// obey bundling restrictions, where \p FOffset is the fragment's offset in
+/// its section and \p FSize is the fragment's size.
+uint64_t computeBundlePadding(const MCAssembler &Assembler, const MCFragment *F,
+ uint64_t FOffset, uint64_t FSize);
+
} // end namespace llvm
#endif
projects / oota-llvm.git / blobdiff