#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"
enum FragmentType {
FT_Align,
FT_Data,
+ FT_Compressed,
FT_CompactEncodedInst,
FT_Fill,
FT_Relaxable,
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
virtual SmallVectorImpl<char> &getContents() = 0;
virtual const SmallVectorImpl<char> &getContents() const = 0;
- virtual uint8_t getBundlePadding() const {
+ uint8_t getBundlePadding() const override {
return BundlePadding;
}
- virtual void setBundlePadding(uint8_t N) {
+ void setBundlePadding(uint8_t N) override {
BundlePadding = N;
}
return false;
case MCFragment::FT_Relaxable:
case MCFragment::FT_CompactEncodedInst:
+ case MCFragment::FT_Compressed:
case MCFragment::FT_Data:
return true;
}
/// data and also have fixups registered.
///
class MCEncodedFragmentWithFixups : public MCEncodedFragment {
- virtual void anchor();
+ void anchor() override;
public:
MCEncodedFragmentWithFixups(MCFragment::FragmentType FType,
static bool classof(const MCFragment *F) {
MCFragment::FragmentType Kind = F->getKind();
- return Kind == MCFragment::FT_Relaxable || Kind == MCFragment::FT_Data;
+ return Kind == MCFragment::FT_Relaxable || Kind == MCFragment::FT_Data ||
+ Kind == MCFragment::FT_Compressed;
}
};
/// Fragment for data and encoded instructions.
///
class MCDataFragment : public MCEncodedFragmentWithFixups {
- virtual void anchor();
+ void anchor() override;
/// \brief Does this fragment contain encoded instructions anywhere in it?
bool HasInstructions;
/// Fixups - The list of fixups in this fragment.
SmallVector<MCFixup, 4> Fixups;
+protected:
+ MCDataFragment(MCFragment::FragmentType FType, MCSectionData *SD = 0)
+ : MCEncodedFragmentWithFixups(FType, SD), HasInstructions(false),
+ AlignToBundleEnd(false) {}
+
public:
MCDataFragment(MCSectionData *SD = 0)
: MCEncodedFragmentWithFixups(FT_Data, SD),
{
}
- 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() {
+ SmallVectorImpl<MCFixup> &getFixups() override {
return Fixups;
}
- const SmallVectorImpl<MCFixup> &getFixups() const {
+ const SmallVectorImpl<MCFixup> &getFixups() const override {
return Fixups;
}
- virtual bool hasInstructions() const { return HasInstructions; }
+ bool hasInstructions() const override { return HasInstructions; }
virtual void setHasInstructions(bool V) { HasInstructions = V; }
- virtual bool alignToBundleEnd() const { return AlignToBundleEnd; }
- virtual void setAlignToBundleEnd(bool V) { AlignToBundleEnd = 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;
+ return F->getKind() == MCFragment::FT_Data ||
+ F->getKind() == MCFragment::FT_Compressed;
}
};
+class MCCompressedFragment: public MCDataFragment {
+ mutable SmallVector<char, 32> CompressedContents;
+public:
+ MCCompressedFragment(MCSectionData *SD = nullptr)
+ : MCDataFragment(FT_Compressed, SD) {}
+ const SmallVectorImpl<char> &getCompressedContents() const;
+ using MCDataFragment::getContents;
+ SmallVectorImpl<char> &getContents() override;
+};
+
/// 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 {
- virtual void anchor();
+ void anchor() override;
/// \brief Should this fragment be aligned to the end of a bundle?
bool AlignToBundleEnd;
{
}
- virtual bool hasInstructions() const {
+ bool hasInstructions() const override {
return true;
}
- 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; }
- virtual bool alignToBundleEnd() const { return AlignToBundleEnd; }
- virtual void setAlignToBundleEnd(bool V) { AlignToBundleEnd = V; }
+ 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;
/// relaxed during the assembler layout and relaxation stage.
///
class MCRelaxableFragment : public MCEncodedFragmentWithFixups {
- virtual void anchor();
+ void anchor() override;
/// Inst - The instruction this is a fragment for.
MCInst Inst;
: 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; }
const MCInst &getInst() const { return Inst; }
void setInst(const MCInst& Value) { Inst = Value; }
const MCSubtargetInfo &getSubtargetInfo() { return STI; }
- SmallVectorImpl<MCFixup> &getFixups() {
+ SmallVectorImpl<MCFixup> &getFixups() override {
return Fixups;
}
- const SmallVectorImpl<MCFixup> &getFixups() const {
+ const SmallVectorImpl<MCFixup> &getFixups() const override {
return Fixups;
}
- virtual bool hasInstructions() const { return true; }
+ 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_Relaxable;
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;
// 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.
/// 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:
/// Compute the effective fragment size assuming it is laid out at the given
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.
///
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
/// @{
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