#define LLVM_MC_MCASSEMBLER_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/Support/Casting.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 raw_ostream;
class MCAsmLayout;
class MCAssembler;
-class MCBinaryExpr;
class MCContext;
class MCCodeEmitter;
class MCExpr;
class MCObjectWriter;
class MCSection;
class MCSectionData;
+class MCSubtargetInfo;
class MCSymbol;
class MCSymbolData;
class MCValue;
-class TargetAsmBackend;
+class MCAsmBackend;
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 &) = 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,
FT_LEB
};
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
+ /// \name Assembler Backend Data
/// @{
//
// FIXME: This could all be kept private to the assembler implementation.
/// initialized.
uint64_t Offset;
- /// EffectiveSize - The compute size of this section. This is ~0 until
- /// initialized.
- uint64_t EffectiveSize;
-
- /// LayoutOrder - The global layout order of this fragment. This is the index
- /// across all fragments in the file, not just within the section.
+ /// LayoutOrder - The layout order of this fragment.
unsigned LayoutOrder;
/// @}
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 {
- SmallString<32> Contents;
+/// Interface implemented by fragments that contain encoded instructions and/or
+/// data.
+///
+class MCEncodedFragment : public MCFragment {
+ virtual void anchor();
- /// 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) {}
+ ~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;
+ }
+ }
+};
+
+/// 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
- /// @{
+ ~MCEncodedFragmentWithFixups() override;
+
+ typedef SmallVectorImpl<MCFixup>::const_iterator const_fixup_iterator;
+ typedef SmallVectorImpl<MCFixup>::iterator fixup_iterator;
- SmallString<32> &getContents() { return Contents; }
- const SmallString<32> &getContents() const { return Contents; }
+ virtual SmallVectorImpl<MCFixup> &getFixups() = 0;
+ virtual const SmallVectorImpl<MCFixup> &getFixups() const = 0;
- /// @}
- /// @name Fixup Access
- /// @{
+ 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 {
- /// Inst - The instruction this is a fragment for.
- MCInst Inst;
+/// 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;
- /// Code - Binary data for the currently encoded instruction.
- SmallString<8> Code;
+ /// \brief Should this fragment be aligned to the end of a bundle?
+ bool AlignToBundleEnd;
- /// Fixups - The list of fixups in this fragment.
- SmallVector<MCFixup, 1> Fixups;
+ SmallVector<char, 4> Contents;
public:
- typedef SmallVectorImpl<MCFixup>::const_iterator const_fixup_iterator;
- typedef SmallVectorImpl<MCFixup>::iterator fixup_iterator;
+ MCCompactEncodedInstFragment(MCSectionData *SD = nullptr)
+ : MCEncodedFragment(FT_CompactEncodedInst, SD), AlignToBundleEnd(false) {}
-public:
- MCInstFragment(MCInst _Inst, MCSectionData *SD = 0)
- : MCFragment(FT_Inst, SD), Inst(_Inst) {
+ 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;
}
+};
- /// @name Accessors
- /// @{
+/// 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;
- SmallVectorImpl<char> &getCode() { return Code; }
- const SmallVectorImpl<char> &getCode() const { return 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;
- unsigned getInstSize() const { return Code.size(); }
+ /// Contents - Binary data for the currently encoded instruction.
+ SmallVector<char, 8> Contents;
- MCInst &getInst() { return Inst; }
- const MCInst &getInst() const { return Inst; }
+ /// Fixups - The list of fixups in this fragment.
+ SmallVector<MCFixup, 1> Fixups;
- void setInst(MCInst Value) { Inst = Value; }
+public:
+ MCRelaxableFragment(const MCInst &Inst, const MCSubtargetInfo &STI,
+ MCSectionData *SD = nullptr)
+ : MCEncodedFragmentWithFixups(FT_Relaxable, SD), Inst(Inst), STI(STI) {}
- /// @}
- /// @name Fixup Access
- /// @{
+ SmallVectorImpl<char> &getContents() override { return Contents; }
+ const SmallVectorImpl<char> &getContents() const override { return Contents; }
- SmallVectorImpl<MCFixup> &getFixups() { return Fixups; }
- const SmallVectorImpl<MCFixup> &getFixups() const { return Fixups; }
+ const MCInst &getInst() const { return Inst; }
+ void setInst(const MCInst &Value) { Inst = Value; }
- fixup_iterator fixup_begin() { return Fixups.begin(); }
- const_fixup_iterator fixup_begin() const { return Fixups.begin(); }
+ const MCSubtargetInfo &getSubtargetInfo() { return STI; }
- fixup_iterator fixup_end() {return Fixups.end();}
- const_fixup_iterator fixup_end() const {return Fixups.end();}
+ SmallVectorImpl<MCFixup> &getFixups() override { return Fixups; }
- size_t fixup_size() const { return Fixups.size(); }
+ const SmallVectorImpl<MCFixup> &getFixups() const override { return Fixups; }
- /// @}
+ bool hasInstructions() const override { return true; }
+
+ 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 {
+ virtual void anchor();
+
/// Alignment - The alignment to ensure, in bytes.
unsigned Alignment;
/// 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
/// target dependent.
bool EmitNops : 1;
- /// OnlyAlignAddress - Flag to indicate that this align is only used to adjust
- /// the address space size of a section and that it should not be included as
- /// part of the section size. This flag can only be used on the last fragment
- /// in a section.
- bool OnlyAlignAddress : 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),
- OnlyAlignAddress(false) {}
-
- /// @name Accessors
+ 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
/// @{
unsigned getAlignment() const { return Alignment; }
bool hasEmitNops() const { return EmitNops; }
void setEmitNops(bool Value) { EmitNops = Value; }
- bool hasOnlyAlignAddress() const { return OnlyAlignAddress; }
- void setOnlyAlignAddress(bool Value) { OnlyAlignAddress = Value; }
-
/// @}
static bool classof(const MCFragment *F) {
return F->getKind() == MCFragment::FT_Align;
}
- static bool classof(const MCAlignFragment *) { return true; }
};
class MCFillFragment : public MCFragment {
+ virtual void anchor();
+
/// 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;
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; }
static bool classof(const MCFragment *F) {
return F->getKind() == MCFragment::FT_Fill;
}
- static bool classof(const MCFillFragment *) { return true; }
};
class MCOrgFragment : public MCFragment {
+ virtual void anchor();
+
/// Offset - The offset this fragment should start at.
const MCExpr *Offset;
/// Value - Value to use for filling bytes.
int8_t Value;
- /// Size - The current estimate of the size.
- unsigned Size;
-
public:
- MCOrgFragment(const MCExpr &_Offset, int8_t _Value, MCSectionData *SD = 0)
- : MCFragment(FT_Org, SD),
- Offset(&_Offset), Value(_Value), Size(0) {}
+ 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; }
uint8_t getValue() const { return Value; }
- unsigned getSize() const { return Size; }
-
- void setSize(unsigned Size_) { Size = Size_; }
/// @}
static bool classof(const MCFragment *F) {
return F->getKind() == MCFragment::FT_Org;
}
- static bool classof(const MCOrgFragment *) { return true; }
};
class MCLEBFragment : public MCFragment {
+ virtual void anchor();
+
/// Value - The value this fragment should contain.
const MCExpr *Value;
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; }
static bool classof(const MCFragment *F) {
return F->getKind() == MCFragment::FT_LEB;
}
- static bool classof(const MCLEBFragment *) { return true; }
};
class MCDwarfLineAddrFragment : public MCFragment {
+ virtual void anchor();
+
/// LineDelta - the value of the difference between the two line numbers
/// between two .loc dwarf directives.
int64_t LineDelta;
SmallString<8> Contents;
public:
- MCDwarfLineAddrFragment(int64_t _LineDelta, const MCExpr &_AddrDelta,
- MCSectionData *SD = 0)
- : 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; }
static bool classof(const MCFragment *F) {
return F->getKind() == MCFragment::FT_Dwarf;
}
- static bool classof(const MCDwarfLineAddrFragment *) { return true; }
+};
+
+class MCDwarfCallFrameFragment : public MCFragment {
+ virtual void anchor();
+
+ /// AddrDelta - The expression for the difference of the two symbols that
+ /// make up the address delta between two .cfi_* dwarf directives.
+ const MCExpr *AddrDelta;
+
+ SmallString<8> Contents;
+
+public:
+ MCDwarfCallFrameFragment(const MCExpr &AddrDelta, MCSectionData *SD = nullptr)
+ : MCFragment(FT_DwarfFrame, SD), AddrDelta(&AddrDelta) {
+ Contents.push_back(0);
+ }
+
+ /// \name Accessors
+ /// @{
+
+ const MCExpr &getAddrDelta() const { return *AddrDelta; }
+
+ SmallString<8> &getContents() { return Contents; }
+ const SmallString<8> &getContents() const { return Contents; }
+
+ /// @}
+
+ static bool classof(const MCFragment *F) {
+ return F->getKind() == MCFragment::FT_DwarfFrame;
+ }
};
// 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 &) = 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;
/// Alignment - The maximum alignment seen in this section.
unsigned Alignment;
- /// @name Assembler Backend Data
+ /// \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
/// @{
//
// FIXME: This could all be kept private to the assembler implementation.
- /// Address - The computed address of this section. This is ~0 until
- /// initialized.
- uint64_t Address;
-
/// HasInstructions - Whether this section has had instructions emitted into
/// 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; }
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(); }
+ 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;
public:
// Only for use as sentinel.
MCSymbolData();
- MCSymbolData(const MCSymbol &_Symbol, MCFragment *_Fragment, uint64_t _Offset,
- MCAssembler *A = 0);
+ MCSymbolData(const MCSymbol &Symbol, MCFragment *Fragment, uint64_t Offset,
+ MCAssembler *A = nullptr);
- /// @name Accessors
+ /// \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
+ /// \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;
}
return CommonSize;
}
- void setSize(const MCExpr *SS) {
- SymbolSize = SS;
- }
-
- const MCExpr *getSize() const {
- return SymbolSize;
- }
+ void setSize(const MCExpr *SS) { SymbolSize = SS; }
+ const MCExpr *getSize() const { return SymbolSize; }
/// getCommonAlignment - Return the alignment of a 'common' symbol.
unsigned getCommonAlignment() const {
/// @}
- 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;
+ 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 &) = delete;
+ void operator=(const MCAssembler &) = delete;
MCContext &Context;
- TargetAsmBackend &Backend;
+ MCAsmBackend &Backend;
MCCodeEmitter &Emitter;
+ MCObjectWriter &Writer;
+
raw_ostream &OS;
iplist<MCSectionData> Sections;
iplist<MCSymbolData> Symbols;
+ DenseSet<const MCSymbol *> LocalsUsedInReloc;
+
/// The map of sections to their associated assembler backend data.
//
// FIXME: Avoid this indirection?
- DenseMap<const MCSection*, MCSectionData*> SectionMap;
+ DenseMap<const MCSection *, MCSectionData *> SectionMap;
/// The map of symbols to their associated assembler backend data.
//
// FIXME: Avoid this indirection?
- DenseMap<const MCSymbol*, MCSymbolData*> SymbolMap;
+ DenseMap<const MCSymbol *, MCSymbolData *> SymbolMap;
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.
+ //
+ // FIXME: We really would like this in target specific code rather than
+ // here. Maybe when the relocation stuff moves to target specific,
+ // this can go with it? The streamer would need some target specific
+ // refactoring too.
+ 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 SubsectionsViaSymbols : 1;
- unsigned PadSectionToAlignment : 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
/// \param DF The fragment the fixup is inside.
/// \param Target [out] On return, the relocatable expression the fixup
/// evaluates to.
- /// \param Value [out] On return, the value of the fixup as currently layed
+ /// \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 MCObjectWriter &Writer, 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 MCObjectWriter &Writer,
- const MCFixup &Fixup, const MCFragment *DF,
+ bool fixupNeedsRelaxation(const MCFixup &Fixup, const MCRelaxableFragment *DF,
const MCAsmLayout &Layout) const;
/// Check whether the given fragment needs relaxation.
- bool FragmentNeedsRelaxation(const MCObjectWriter &Writer,
- const MCInstFragment *IF,
+ bool fragmentNeedsRelaxation(const MCRelaxableFragment *IF,
const MCAsmLayout &Layout) const;
- /// Compute the effective fragment size assuming it is layed out at the given
- /// \arg SectionAddress and \arg FragmentOffset.
- uint64_t ComputeFragmentSize(const MCFragment &F,
- uint64_t SectionAddress,
- uint64_t FragmentOffset) 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(const MCObjectWriter &Writer, MCAsmLayout &Layout);
+ 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(const MCObjectWriter &Writer, MCAsmLayout &Layout,
- MCInstFragment &IF);
+ bool relaxInstruction(MCAsmLayout &Layout, MCRelaxableFragment &IF);
- bool RelaxOrg(const MCObjectWriter &Writer, MCAsmLayout &Layout,
- MCOrgFragment &OF);
+ bool relaxLEB(MCAsmLayout &Layout, MCLEBFragment &IF);
- bool RelaxLEB(const MCObjectWriter &Writer, MCAsmLayout &Layout,
- MCLEBFragment &IF);
+ bool relaxDwarfLineAddr(MCAsmLayout &Layout, MCDwarfLineAddrFragment &DF);
+ bool relaxDwarfCallFrameFragment(MCAsmLayout &Layout,
+ MCDwarfCallFrameFragment &DF);
- bool RelaxDwarfLineAddr(const MCObjectWriter &Writer, MCAsmLayout &Layout,
- MCDwarfLineAddrFragment &DF);
+ /// finishLayout - Finalize a layout, including fragment lowering.
+ void finishLayout(MCAsmLayout &Layout);
- /// FinishLayout - Finalize a layout, including fragment lowering.
- void FinishLayout(MCAsmLayout &Layout);
+ 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,
+ const MCFragment &F) const;
+
/// 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;
bool isSymbolLinkerVisible(const MCSymbol &SD) const;
/// Emit the section contents using the given object writer.
- //
- // FIXME: Should MCAssembler always have a reference to the object writer?
- void WriteSectionData(const MCSectionData *Section, const MCAsmLayout &Layout,
- MCObjectWriter *OW) const;
+ void writeSectionData(const MCSectionData *Section,
+ const MCAsmLayout &Layout) const;
+
+ /// Check whether a given symbol has been flagged with .thumb_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
// option is to make this abstract, and have targets provide concrete
// implementations as we do with AsmParser.
- MCAssembler(MCContext &_Context, TargetAsmBackend &_Backend,
- MCCodeEmitter &_Emitter, bool _PadSectionToAlignment,
+ MCAssembler(MCContext &Context_, MCAsmBackend &Backend_,
+ MCCodeEmitter &Emitter_, MCObjectWriter &Writer_,
raw_ostream &OS);
~MCAssembler();
+ /// Reuse an assembler instance
+ ///
+ void reset();
+
MCContext &getContext() const { return Context; }
- TargetAsmBackend &getBackend() const { return Backend; }
+ MCAsmBackend &getBackend() const { return Backend; }
MCCodeEmitter &getEmitter() const { return Emitter; }
+ 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(MCObjectWriter *Writer = 0);
+ 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; }
- /// @name Section List Access
+ 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
/// @{
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; }
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 Backend Data 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; }
+
+ 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 &getSectionData(const MCSection &Section) const {
}
MCSectionData &getOrCreateSectionData(const MCSection &Section,
- bool *Created = 0) {
+ 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 {
+ 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 (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);
+ }
+
+ /// \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