#ifndef LLVM_MC_MCFRAGMENT_H
#define LLVM_MC_MCFRAGMENT_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/MCFixup.h"
#include "llvm/MC/MCInst.h"
namespace llvm {
class MCSection;
class MCSymbol;
class MCSubtargetInfo;
class MCFragment : public ilist_node_with_parent<MCFragment, MCSection> {
friend class MCAsmLayout;
MCFragment(const MCFragment &) = delete;
void operator=(const MCFragment &) = delete;
public:
enum FragmentType : uint8_t {
FT_Align,
FT_Data,
FT_CompactEncodedInst,
FT_Fill,
FT_Relaxable,
FT_Org,
FT_Dwarf,
FT_DwarfFrame,
FT_LEB,
FT_SafeSEH,
FT_Dummy
};
private:
FragmentType Kind;
protected:
bool HasInstructions;
private:
bool AlignToBundleEnd;
uint8_t BundlePadding;
unsigned LayoutOrder;
MCSection *Parent;
const MCSymbol *Atom;
uint64_t Offset;
protected:
MCFragment(FragmentType Kind, bool HasInstructions,
uint8_t BundlePadding, MCSection *Parent = nullptr);
~MCFragment();
private:
friend struct ilist_sentinel_traits<MCFragment>;
MCFragment();
public:
void destroy();
FragmentType getKind() const { return Kind; }
MCSection *getParent() const { return Parent; }
void setParent(MCSection *Value) { Parent = 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; }
bool hasInstructions() const { return HasInstructions; }
bool alignToBundleEnd() const { return AlignToBundleEnd; }
void setAlignToBundleEnd(bool V) { AlignToBundleEnd = V; }
uint8_t getBundlePadding() const { return BundlePadding; }
void setBundlePadding(uint8_t N) { BundlePadding = N; }
bool isDummy() const { return Kind == FT_Dummy; }
void dump();
};
class MCDummyFragment : public MCFragment {
public:
explicit MCDummyFragment(MCSection *Sec)
: MCFragment(FT_Dummy, false, 0, Sec){};
static bool classof(const MCFragment *F) { return F->getKind() == FT_Dummy; }
};
class MCEncodedFragment : public MCFragment {
protected:
MCEncodedFragment(MCFragment::FragmentType FType, bool HasInstructions,
MCSection *Sec)
: MCFragment(FType, HasInstructions, 0, Sec) {}
public:
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;
}
}
};
template<unsigned ContentsSize>
class MCEncodedFragmentWithContents : public MCEncodedFragment {
SmallVector<char, ContentsSize> Contents;
protected:
MCEncodedFragmentWithContents(MCFragment::FragmentType FType,
bool HasInstructions,
MCSection *Sec)
: MCEncodedFragment(FType, HasInstructions, Sec) {}
public:
SmallVectorImpl<char> &getContents() { return Contents; }
const SmallVectorImpl<char> &getContents() const { return Contents; }
};
template<unsigned ContentsSize, unsigned FixupsSize>
class MCEncodedFragmentWithFixups :
public MCEncodedFragmentWithContents<ContentsSize> {
SmallVector<MCFixup, FixupsSize> Fixups;
protected:
MCEncodedFragmentWithFixups(MCFragment::FragmentType FType,
bool HasInstructions,
MCSection *Sec)
: MCEncodedFragmentWithContents<ContentsSize>(FType, HasInstructions,
Sec) {}
public:
typedef SmallVectorImpl<MCFixup>::const_iterator const_fixup_iterator;
typedef SmallVectorImpl<MCFixup>::iterator fixup_iterator;
SmallVectorImpl<MCFixup> &getFixups() { return Fixups; }
const SmallVectorImpl<MCFixup> &getFixups() const { return Fixups; }
fixup_iterator fixup_begin() { return Fixups.begin(); }
const_fixup_iterator fixup_begin() const { return Fixups.begin(); }
fixup_iterator fixup_end() { return Fixups.end(); }
const_fixup_iterator fixup_end() const { return Fixups.end(); }
static bool classof(const MCFragment *F) {
MCFragment::FragmentType Kind = F->getKind();
return Kind == MCFragment::FT_Relaxable || Kind == MCFragment::FT_Data;
}
};
class MCDataFragment : public MCEncodedFragmentWithFixups<32, 4> {
public:
MCDataFragment(MCSection *Sec = nullptr)
: MCEncodedFragmentWithFixups<32, 4>(FT_Data, false, Sec) {}
void setHasInstructions(bool V) { HasInstructions = V; }
static bool classof(const MCFragment *F) {
return F->getKind() == MCFragment::FT_Data;
}
};
class MCCompactEncodedInstFragment : public MCEncodedFragmentWithContents<4> {
public:
MCCompactEncodedInstFragment(MCSection *Sec = nullptr)
: MCEncodedFragmentWithContents(FT_CompactEncodedInst, true, Sec) {
}
static bool classof(const MCFragment *F) {
return F->getKind() == MCFragment::FT_CompactEncodedInst;
}
};
class MCRelaxableFragment : public MCEncodedFragmentWithFixups<8, 1> {
MCInst Inst;
const MCSubtargetInfo &STI;
public:
MCRelaxableFragment(const MCInst &Inst, const MCSubtargetInfo &STI,
MCSection *Sec = nullptr)
: MCEncodedFragmentWithFixups(FT_Relaxable, true, Sec),
Inst(Inst), STI(STI) {}
const MCInst &getInst() const { return Inst; }
void setInst(const MCInst &Value) { Inst = Value; }
const MCSubtargetInfo &getSubtargetInfo() { return STI; }
static bool classof(const MCFragment *F) {
return F->getKind() == MCFragment::FT_Relaxable;
}
};
class MCAlignFragment : public MCFragment {
unsigned Alignment;
bool EmitNops : 1;
int64_t Value;
unsigned ValueSize;
unsigned MaxBytesToEmit;
public:
MCAlignFragment(unsigned Alignment, int64_t Value, unsigned ValueSize,
unsigned MaxBytesToEmit, MCSection *Sec = nullptr)
: MCFragment(FT_Align, false, 0, Sec), Alignment(Alignment),
EmitNops(false), Value(Value),
ValueSize(ValueSize), MaxBytesToEmit(MaxBytesToEmit) {}
unsigned getAlignment() const { return Alignment; }
int64_t getValue() const { return Value; }
unsigned getValueSize() const { return ValueSize; }
unsigned getMaxBytesToEmit() const { return MaxBytesToEmit; }
bool hasEmitNops() const { return EmitNops; }
void setEmitNops(bool Value) { EmitNops = Value; }
static bool classof(const MCFragment *F) {
return F->getKind() == MCFragment::FT_Align;
}
};
class MCFillFragment : public MCFragment {
uint8_t Value;
uint64_t Size;
public:
MCFillFragment(uint8_t Value, uint64_t Size, MCSection *Sec = nullptr)
: MCFragment(FT_Fill, false, 0, Sec), Value(Value), Size(Size) {}
uint8_t getValue() const { return Value; }
uint64_t getSize() const { return Size; }
static bool classof(const MCFragment *F) {
return F->getKind() == MCFragment::FT_Fill;
}
};
class MCOrgFragment : public MCFragment {
const MCExpr *Offset;
int8_t Value;
public:
MCOrgFragment(const MCExpr &Offset, int8_t Value, MCSection *Sec = nullptr)
: MCFragment(FT_Org, false, 0, Sec), Offset(&Offset), Value(Value) {}
const MCExpr &getOffset() const { return *Offset; }
uint8_t getValue() const { return Value; }
static bool classof(const MCFragment *F) {
return F->getKind() == MCFragment::FT_Org;
}
};
class MCLEBFragment : public MCFragment {
const MCExpr *Value;
bool IsSigned;
SmallString<8> Contents;
public:
MCLEBFragment(const MCExpr &Value_, bool IsSigned_, MCSection *Sec = nullptr)
: MCFragment(FT_LEB, false, 0, Sec), Value(&Value_), IsSigned(IsSigned_) {
Contents.push_back(0);
}
const MCExpr &getValue() const { return *Value; }
bool isSigned() const { return IsSigned; }
SmallString<8> &getContents() { return Contents; }
const SmallString<8> &getContents() const { return Contents; }
static bool classof(const MCFragment *F) {
return F->getKind() == MCFragment::FT_LEB;
}
};
class MCDwarfLineAddrFragment : public MCFragment {
int64_t LineDelta;
const MCExpr *AddrDelta;
SmallString<8> Contents;
public:
MCDwarfLineAddrFragment(int64_t LineDelta, const MCExpr &AddrDelta,
MCSection *Sec = nullptr)
: MCFragment(FT_Dwarf, false, 0, Sec), LineDelta(LineDelta),
AddrDelta(&AddrDelta) {
Contents.push_back(0);
}
int64_t getLineDelta() const { return LineDelta; }
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_Dwarf;
}
};
class MCDwarfCallFrameFragment : public MCFragment {
const MCExpr *AddrDelta;
SmallString<8> Contents;
public:
MCDwarfCallFrameFragment(const MCExpr &AddrDelta, MCSection *Sec = nullptr)
: MCFragment(FT_DwarfFrame, false, 0, Sec), AddrDelta(&AddrDelta) {
Contents.push_back(0);
}
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;
}
};
class MCSafeSEHFragment : public MCFragment {
const MCSymbol *Sym;
public:
MCSafeSEHFragment(const MCSymbol *Sym, MCSection *Sec = nullptr)
: MCFragment(FT_SafeSEH, false, 0, Sec), Sym(Sym) {}
const MCSymbol *getSymbol() { return Sym; }
const MCSymbol *getSymbol() const { return Sym; }
static bool classof(const MCFragment *F) {
return F->getKind() == MCFragment::FT_SafeSEH;
}
};
}
#endif