#ifndef LLVM_MC_MCASSEMBLER_H
#define LLVM_MC_MCASSEMBLER_H
-#include "llvm/MC/MCFixup.h"
-#include "llvm/MC/MCInst.h"
#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/DenseSet.h"
+#include "llvm/ADT/PointerIntPair.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/ilist.h"
#include "llvm/ADT/ilist_node.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/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 MCSubtargetInfo;
class MCSymbol;
class MCSymbolData;
class MCValue;
class MCFragment : public ilist_node<MCFragment> {
friend class MCAsmLayout;
- MCFragment(const MCFragment&); // DO NOT IMPLEMENT
- void operator=(const MCFragment&); // DO NOT IMPLEMENT
+ MCFragment(const MCFragment&) LLVM_DELETED_FUNCTION;
+ void operator=(const MCFragment&) LLVM_DELETED_FUNCTION;
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().
+ /// symbol.
MCSymbolData *Atom;
/// @name Assembler Backend Data
/// @}
protected:
- MCFragment(FragmentType _Kind, MCSectionData *_Parent = 0);
+ MCFragment(FragmentType _Kind, MCSectionData *_Parent = nullptr);
public:
// Only for sentinel.
unsigned getLayoutOrder() const { return LayoutOrder; }
void setLayoutOrder(unsigned Value) { LayoutOrder = Value; }
- static bool classof(const MCFragment *O) { return true; }
+ /// \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();
};
-class MCDataFragment : public MCFragment {
+/// Interface implemented by fragments that contain encoded instructions and/or
+/// data.
+///
+class MCEncodedFragment : public MCFragment {
virtual void anchor();
- SmallString<32> Contents;
-
- /// Fixups - The list of fixups in this fragment.
- std::vector<MCFixup> Fixups;
+ uint8_t BundlePadding;
public:
- typedef std::vector<MCFixup>::const_iterator const_fixup_iterator;
- typedef std::vector<MCFixup>::iterator fixup_iterator;
+ MCEncodedFragment(MCFragment::FragmentType FType, MCSectionData *SD = nullptr)
+ : MCFragment(FType, SD), BundlePadding(0)
+ {
+ }
+ virtual ~MCEncodedFragment();
+
+ 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;
+ }
+ }
+};
+
+/// Interface implemented by fragments that contain encoded instructions and/or
+/// data and also have fixups registered.
+///
+class MCEncodedFragmentWithFixups : public MCEncodedFragment {
+ void anchor() override;
public:
- MCDataFragment(MCSectionData *SD = 0) : MCFragment(FT_Data, SD) {}
+ MCEncodedFragmentWithFixups(MCFragment::FragmentType FType,
+ MCSectionData *SD = nullptr)
+ : MCEncodedFragment(FType, SD)
+ {
+ }
- /// @name Accessors
- /// @{
+ virtual ~MCEncodedFragmentWithFixups();
- SmallString<32> &getContents() { return Contents; }
- const SmallString<32> &getContents() const { return Contents; }
+ typedef SmallVectorImpl<MCFixup>::const_iterator const_fixup_iterator;
+ typedef SmallVectorImpl<MCFixup>::iterator fixup_iterator;
- /// @}
- /// @name Fixup Access
- /// @{
+ 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 fixup_iterator fixup_end() = 0;
+ virtual const_fixup_iterator fixup_end() const = 0;
- void addFixup(MCFixup Fixup) {
- // Enforce invariant that fixups are in offset order.
- assert((Fixups.empty() || Fixup.getOffset() > Fixups.back().getOffset()) &&
- "Fixups must be added in order!");
- Fixups.push_back(Fixup);
+ static bool classof(const MCFragment *F) {
+ MCFragment::FragmentType Kind = F->getKind();
+ return Kind == MCFragment::FT_Relaxable || Kind == MCFragment::FT_Data;
}
+};
- std::vector<MCFixup> &getFixups() { return Fixups; }
- const std::vector<MCFixup> &getFixups() const { return Fixups; }
+/// Fragment for data and encoded instructions.
+///
+class MCDataFragment : public MCEncodedFragmentWithFixups {
+ void anchor() override;
- fixup_iterator fixup_begin() { return Fixups.begin(); }
- const_fixup_iterator fixup_begin() const { return Fixups.begin(); }
+ /// \brief Does this fragment contain encoded instructions anywhere in it?
+ bool HasInstructions;
- fixup_iterator fixup_end() {return Fixups.end();}
- const_fixup_iterator fixup_end() const {return Fixups.end();}
+ /// \brief Should this fragment be aligned to the end of a bundle?
+ bool AlignToBundleEnd;
- size_t fixup_size() const { return Fixups.size(); }
+ SmallVector<char, 32> Contents;
- /// @}
+ /// Fixups - The list of fixups in this fragment.
+ SmallVector<MCFixup, 4> Fixups;
+public:
+ MCDataFragment(MCSectionData *SD = nullptr)
+ : MCEncodedFragmentWithFixups(FT_Data, SD),
+ HasInstructions(false), AlignToBundleEnd(false)
+ {
+ }
+
+ SmallVectorImpl<char> &getContents() override { return Contents; }
+ const SmallVectorImpl<char> &getContents() const override {
+ return Contents;
+ }
+
+ SmallVectorImpl<MCFixup> &getFixups() override {
+ 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() override { return Fixups.begin(); }
+ const_fixup_iterator fixup_begin() const override { return Fixups.begin(); }
+
+ 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;
}
- static bool classof(const MCDataFragment *) { return true; }
};
-// FIXME: This current incarnation of MCInstFragment doesn't make much sense, as
-// it is almost entirely a duplicate of MCDataFragment. If we decide to stick
-// with this approach (as opposed to making MCInstFragment a very light weight
-// object with just the MCInst and a code size, then we should just change
-// MCDataFragment to have an optional MCInst at its end.
-class MCInstFragment : public MCFragment {
- 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;
- /// Code - Binary data for the currently encoded instruction.
- SmallString<8> Code;
+ /// 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;
/// Fixups - The list of fixups in this fragment.
SmallVector<MCFixup, 1> Fixups;
public:
- typedef SmallVectorImpl<MCFixup>::const_iterator const_fixup_iterator;
- typedef SmallVectorImpl<MCFixup>::iterator fixup_iterator;
-
-public:
- MCInstFragment(MCInst _Inst, MCSectionData *SD = 0)
- : MCFragment(FT_Inst, SD), Inst(_Inst) {
+ MCRelaxableFragment(const MCInst &_Inst,
+ const MCSubtargetInfo &_STI,
+ MCSectionData *SD = nullptr)
+ : MCEncodedFragmentWithFixups(FT_Relaxable, SD), Inst(_Inst), STI(_STI) {
}
- /// @name Accessors
- /// @{
-
- SmallVectorImpl<char> &getCode() { return Code; }
- const SmallVectorImpl<char> &getCode() const { return Code; }
+ SmallVectorImpl<char> &getContents() override { return Contents; }
+ const SmallVectorImpl<char> &getContents() const override { return Contents; }
- unsigned getInstSize() const { return Code.size(); }
-
- MCInst &getInst() { return Inst; }
const MCInst &getInst() const { return Inst; }
+ void setInst(const MCInst& Value) { Inst = Value; }
- void setInst(MCInst Value) { Inst = Value; }
+ const MCSubtargetInfo &getSubtargetInfo() { return STI; }
- /// @}
- /// @name Fixup Access
- /// @{
-
- SmallVectorImpl<MCFixup> &getFixups() { return Fixups; }
- const SmallVectorImpl<MCFixup> &getFixups() const { return Fixups; }
+ SmallVectorImpl<MCFixup> &getFixups() override {
+ return Fixups;
+ }
- fixup_iterator fixup_begin() { return Fixups.begin(); }
- const_fixup_iterator fixup_begin() const { return Fixups.begin(); }
+ const SmallVectorImpl<MCFixup> &getFixups() const override {
+ return Fixups;
+ }
- fixup_iterator fixup_end() {return Fixups.end();}
- const_fixup_iterator fixup_end() const {return Fixups.end();}
+ bool hasInstructions() const override { return true; }
- size_t fixup_size() const { return Fixups.size(); }
+ fixup_iterator fixup_begin() override { return Fixups.begin(); }
+ const_fixup_iterator fixup_begin() const override { return Fixups.begin(); }
- /// @}
+ 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;
}
- static bool classof(const MCInstFragment *) { return true; }
};
class MCAlignFragment : public MCFragment {
/// Value - Value to use for filling padding bytes.
int64_t Value;
- /// ValueSize - The size of the integer (in bytes) of \arg Value.
+ /// ValueSize - The size of the integer (in bytes) of \p Value.
unsigned ValueSize;
/// MaxBytesToEmit - The maximum number of bytes to emit; if the alignment
public:
MCAlignFragment(unsigned _Alignment, int64_t _Value, unsigned _ValueSize,
- unsigned _MaxBytesToEmit, MCSectionData *SD = 0)
+ unsigned _MaxBytesToEmit, MCSectionData *SD = nullptr)
: MCFragment(FT_Align, SD), Alignment(_Alignment),
Value(_Value),ValueSize(_ValueSize),
MaxBytesToEmit(_MaxBytesToEmit), EmitNops(false) {}
static bool classof(const MCFragment *F) {
return F->getKind() == MCFragment::FT_Align;
}
- static bool classof(const MCAlignFragment *) { return true; }
};
class MCFillFragment : public MCFragment {
/// Value - Value to use for filling bytes.
int64_t Value;
- /// ValueSize - The size (in bytes) of \arg Value to use when filling, or 0 if
+ /// ValueSize - The size (in bytes) of \p Value to use when filling, or 0 if
/// this is a virtual fill fragment.
unsigned ValueSize;
public:
MCFillFragment(int64_t _Value, unsigned _ValueSize, uint64_t _Size,
- MCSectionData *SD = 0)
+ MCSectionData *SD = nullptr)
: MCFragment(FT_Fill, SD),
Value(_Value), ValueSize(_ValueSize), Size(_Size) {
assert((!ValueSize || (Size % ValueSize) == 0) &&
static bool classof(const MCFragment *F) {
return F->getKind() == MCFragment::FT_Fill;
}
- static bool classof(const MCFillFragment *) { return true; }
};
class MCOrgFragment : public MCFragment {
int8_t Value;
public:
- MCOrgFragment(const MCExpr &_Offset, int8_t _Value, MCSectionData *SD = 0)
+ MCOrgFragment(const MCExpr &_Offset, int8_t _Value,
+ MCSectionData *SD = nullptr)
: MCFragment(FT_Org, SD),
Offset(&_Offset), Value(_Value) {}
static bool classof(const MCFragment *F) {
return F->getKind() == MCFragment::FT_Org;
}
- static bool classof(const MCOrgFragment *) { return true; }
};
class MCLEBFragment : public MCFragment {
SmallString<8> Contents;
public:
- MCLEBFragment(const MCExpr &Value_, bool IsSigned_, MCSectionData *SD)
+ MCLEBFragment(const MCExpr &Value_, bool IsSigned_,
+ MCSectionData *SD = nullptr)
: MCFragment(FT_LEB, SD),
Value(&Value_), IsSigned(IsSigned_) { Contents.push_back(0); }
static bool classof(const MCFragment *F) {
return F->getKind() == MCFragment::FT_LEB;
}
- static bool classof(const MCLEBFragment *) { return true; }
};
class MCDwarfLineAddrFragment : public MCFragment {
public:
MCDwarfLineAddrFragment(int64_t _LineDelta, const MCExpr &_AddrDelta,
- MCSectionData *SD)
+ MCSectionData *SD = nullptr)
: MCFragment(FT_Dwarf, SD),
LineDelta(_LineDelta), AddrDelta(&_AddrDelta) { Contents.push_back(0); }
static bool classof(const MCFragment *F) {
return F->getKind() == MCFragment::FT_Dwarf;
}
- static bool classof(const MCDwarfLineAddrFragment *) { return true; }
};
class MCDwarfCallFrameFragment : public MCFragment {
SmallString<8> Contents;
public:
- MCDwarfCallFrameFragment(const MCExpr &_AddrDelta, MCSectionData *SD)
+ MCDwarfCallFrameFragment(const MCExpr &_AddrDelta,
+ MCSectionData *SD = nullptr)
: MCFragment(FT_DwarfFrame, SD),
AddrDelta(&_AddrDelta) { Contents.push_back(0); }
static bool classof(const MCFragment *F) {
return F->getKind() == MCFragment::FT_DwarfFrame;
}
- static bool classof(const MCDwarfCallFrameFragment *) { return true; }
};
// FIXME: Should this be a separate class, or just merged into MCSection? Since
class MCSectionData : public ilist_node<MCSectionData> {
friend class MCAsmLayout;
- MCSectionData(const MCSectionData&); // DO NOT IMPLEMENT
- void operator=(const MCSectionData&); // DO NOT IMPLEMENT
+ MCSectionData(const MCSectionData&) LLVM_DELETED_FUNCTION;
+ void operator=(const MCSectionData&) LLVM_DELETED_FUNCTION;
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;
/// Alignment - The maximum alignment seen in this section.
unsigned Alignment;
+ /// \brief Keeping track of bundle-locked state.
+ BundleLockStateType BundleLockState;
+
+ /// \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
/// @{
//
/// 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(const MCSection &Section, MCAssembler *A = nullptr);
const MCSection &getSection() const { return *Section; }
bool empty() const { return Fragments.empty(); }
+ iterator getSubsectionInsertionPoint(unsigned Subsection);
+
+ bool isBundleLocked() const {
+ return BundleLockState != NotBundleLocked;
+ }
+
+ BundleLockStateType getBundleLockState() const {
+ return BundleLockState;
+ }
+
+ void setBundleLockState(BundleLockStateType NewState);
+
+ bool isBundleGroupBeforeFirstInst() const {
+ return BundleGroupBeforeFirstInst;
+ }
+
+ void setBundleGroupBeforeFirstInst(bool IsFirst) {
+ BundleGroupBeforeFirstInst = IsFirst;
+ }
+
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;
+ /// Fragment - The fragment this symbol's value is relative to, if any. Also
+ /// stores if this symbol is visible outside this translation unit (bit 0) or
+ /// if it is private extern (bit 1).
+ PointerIntPair<MCFragment *, 2> Fragment;
- /// IsPrivateExtern - True if this symbol is private extern.
- unsigned IsPrivateExtern : 1;
+ union {
+ /// Offset - The offset to apply to the fragment address to form this
+ /// symbol's value.
+ uint64_t Offset;
- /// 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;
+ /// CommonSize - The size of the symbol, if it is 'common'.
+ 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'.
+ /// CommonAlign - The alignment of the symbol, if it is 'common', or -1.
//
// FIXME: Pack this in with other fields?
unsigned CommonAlign;
// Only for use as sentinel.
MCSymbolData();
MCSymbolData(const MCSymbol &_Symbol, MCFragment *_Fragment, uint64_t _Offset,
- MCAssembler *A = 0);
+ MCAssembler *A = nullptr);
/// @name Accessors
/// @{
const MCSymbol &getSymbol() const { return *Symbol; }
- MCFragment *getFragment() const { return Fragment; }
- void setFragment(MCFragment *Value) { Fragment = Value; }
+ MCFragment *getFragment() const { return Fragment.getPointer(); }
+ void setFragment(MCFragment *Value) { Fragment.setPointer(Value); }
- uint64_t getOffset() const { return Offset; }
- void setOffset(uint64_t Value) { Offset = Value; }
+ uint64_t getOffset() const {
+ assert(!isCommon());
+ return Offset;
+ }
+ void setOffset(uint64_t Value) {
+ assert(!isCommon());
+ Offset = Value;
+ }
/// @}
/// @name Symbol Attributes
/// @{
- bool isExternal() const { return IsExternal; }
- void setExternal(bool Value) { IsExternal = Value; }
+ bool isExternal() const { return Fragment.getInt() & 1; }
+ void setExternal(bool Value) {
+ Fragment.setInt((Fragment.getInt() & ~1) | unsigned(Value));
+ }
- bool isPrivateExtern() const { return IsPrivateExtern; }
- void setPrivateExtern(bool Value) { IsPrivateExtern = Value; }
+ bool isPrivateExtern() const { return Fragment.getInt() & 2; }
+ void setPrivateExtern(bool Value) {
+ Fragment.setInt((Fragment.getInt() & ~2) | (unsigned(Value) << 1));
+ }
/// isCommon - Is this a 'common' symbol.
- bool isCommon() const { return CommonSize != 0; }
+ bool isCommon() const { return CommonAlign != -1U; }
/// 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) {
+ assert(getOffset() == 0);
CommonSize = Size;
CommonAlign = Align;
}
/// @}
- void dump();
+ void dump() const;
};
// FIXME: This really doesn't belong here. See comments below.
MCSectionData *SectionData;
};
+// FIXME: Ditto this. Purely so the Streamer and the ObjectWriter can talk
+// to one another.
+struct DataRegionData {
+ // This enum should be kept in sync w/ the mach-o definition in
+ // llvm/Object/MachOFormat.h.
+ enum KindTy { Data = 1, JumpTable8, JumpTable16, JumpTable32 } Kind;
+ MCSymbol *Start;
+ MCSymbol *End;
+};
+
class MCAssembler {
friend class MCAsmLayout;
typedef SymbolDataListType::const_iterator const_symbol_iterator;
typedef 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;
typedef std::vector<IndirectSymbolData>::iterator indirect_symbol_iterator;
+ typedef std::vector<DataRegionData>::const_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&); // DO NOT IMPLEMENT
- void operator=(const MCAssembler&); // DO NOT IMPLEMENT
+ MCAssembler(const MCAssembler&) LLVM_DELETED_FUNCTION;
+ void operator=(const MCAssembler&) LLVM_DELETED_FUNCTION;
MCContext &Context;
iplist<MCSymbolData> Symbols;
+ DenseSet<const MCSymbol *> LocalsUsedInReloc;
+
/// The map of sections to their associated assembler backend data.
//
// FIXME: Avoid this indirection?
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.
/// \param Value [out] On return, the value of the fixup as currently laid
/// out.
/// \return Whether the fixup value was fully resolved. This is true if the
- /// \arg Value result is fixed, otherwise the value may change due to
+ /// \p Value result is fixed, otherwise the value may change due to
/// relocation.
bool evaluateFixup(const MCAsmLayout &Layout,
const MCFixup &Fixup, const MCFragment *DF,
/// 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;
- /// layoutOnce - Perform one layout iteration and return true if any offsets
+ /// \brief Perform one layout iteration and return true if any offsets
/// were adjusted.
bool layoutOnce(MCAsmLayout &Layout);
+ /// \brief Perform one layout iteration of the given section and return true
+ /// 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
- /// \arg SectionAddress and \arg FragmentOffset.
+ /// \p SectionAddress and \p FragmentOffset.
uint64_t computeFragmentSize(const MCAsmLayout &Layout,
const MCFragment &F) const;
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.
///
- /// \arg OS - The stream to output to.
+ /// \param OS The stream to output to.
//
// FIXME: How are we going to parameterize this? Two obvious options are stay
// concrete and require clients to pass in a target like object. The other
raw_ostream &OS);
~MCAssembler();
+ /// Reuse an assembler instance
+ ///
+ void reset();
+
MCContext &getContext() const { return Context; }
MCAsmBackend &getBackend() const { return Backend; }
MCObjectWriter &getWriter() const { return Writer; }
/// Finish - Do final processing and write the object to the output stream.
- /// \arg Writer is used for custom object writer (as the MCJIT does),
+ /// \p Writer is used for custom object writer (as the MCJIT does),
/// if not specified it is automatically created from backend.
void Finish();
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;
+ }
+
+ 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
/// @{
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(); }
/// @}
size_t indirect_symbol_size() const { return IndirectSymbols.size(); }
+ /// @}
+ /// @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;
+ }
+
+ 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();
+ }
+ const_data_region_iterator data_region_end() const {
+ return DataRegions.end();
+ }
+
+ size_t data_region_size() const { return DataRegions.size(); }
+
+ /// @}
+ /// @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 &getOrCreateSectionData(const MCSection &Section,
- bool *Created = 0) {
+ bool *Created = nullptr) {
MCSectionData *&Entry = SectionMap[&Section];
if (Created) *Created = !Entry;
return *Entry;
}
- MCSymbolData &getSymbolData(const MCSymbol &Symbol) const {
+ bool hasSymbolData(const MCSymbol &Symbol) const {
+ return SymbolMap.lookup(&Symbol) != nullptr;
+ }
+
+ MCSymbolData &getSymbolData(const MCSymbol &Symbol) {
+ return const_cast<MCSymbolData &>(
+ static_cast<const MCAssembler &>(*this).getSymbolData(Symbol));
+ }
+
+ const MCSymbolData &getSymbolData(const MCSymbol &Symbol) const {
MCSymbolData *Entry = SymbolMap.lookup(&Symbol);
assert(Entry && "Missing symbol data!");
return *Entry;
}
MCSymbolData &getOrCreateSymbolData(const MCSymbol &Symbol,
- bool *Created = 0) {
+ bool *Created = nullptr) {
MCSymbolData *&Entry = SymbolMap[&Symbol];
if (Created) *Created = !Entry;
if (!Entry)
- Entry = new MCSymbolData(Symbol, 0, 0, this);
+ Entry = new MCSymbolData(Symbol, nullptr, 0, this);
return *Entry;
}
+ const_file_name_iterator file_names_begin() const {
+ return FileNames.begin();
+ }
+
+ 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);
+ }
+
/// @}
void dump();
projects / oota-llvm.git / blobdiff