#ifndef LLVM_MC_MCSECTION_H
#define LLVM_MC_MCSECTION_H
+#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/ilist.h"
+#include "llvm/ADT/ilist_node.h"
#include "llvm/MC/SectionKind.h"
#include "llvm/Support/Compiler.h"
namespace llvm {
+class MCAssembler;
class MCAsmInfo;
class MCContext;
class MCExpr;
+class MCFragment;
+class MCSection;
class MCSymbol;
class raw_ostream;
+template<>
+struct ilist_node_traits<MCFragment> {
+ MCFragment *createNode(const MCFragment &V);
+ static void deleteNode(MCFragment *V);
+
+ void addNodeToList(MCFragment *) {}
+ void removeNodeFromList(MCFragment *) {}
+ void transferNodesFromList(ilist_node_traits & /*SrcTraits*/,
+ ilist_iterator<MCFragment> /*first*/,
+ ilist_iterator<MCFragment> /*last*/) {}
+};
+
/// Instances of this class represent a uniqued identifier for a section in the
/// current translation unit. The MCContext class uniques and creates these.
class MCSection {
public:
enum SectionVariant { SV_COFF = 0, SV_ELF, SV_MachO };
+ /// \brief Express the state of bundle locked groups while emitting code.
+ enum BundleLockStateType {
+ NotBundleLocked,
+ BundleLocked,
+ BundleLockedAlignToEnd
+ };
+
+ typedef iplist<MCFragment> FragmentListType;
+
+ typedef FragmentListType::const_iterator const_iterator;
+ typedef FragmentListType::iterator iterator;
+
+ typedef FragmentListType::const_reverse_iterator const_reverse_iterator;
+ typedef FragmentListType::reverse_iterator reverse_iterator;
+
private:
MCSection(const MCSection &) = delete;
void operator=(const MCSection &) = delete;
/// The alignment requirement of this section.
unsigned Alignment = 1;
/// The section index in the assemblers section list.
- unsigned Ordinal = ~UINT32_C(0);
+ unsigned Ordinal = 0;
+ /// The index of this section in the layout order.
+ unsigned LayoutOrder;
+
+ /// \brief Keeping track of bundle-locked state.
+ BundleLockStateType BundleLockState = NotBundleLocked;
+
+ /// \brief Current nesting depth of bundle_lock directives.
+ unsigned BundleLockNestingDepth = 0;
+
+ /// \brief We've seen a bundle_lock directive but not its first instruction
+ /// yet.
+ unsigned BundleGroupBeforeFirstInst : 1;
+
+ /// Whether this section has had instructions emitted into it.
+ unsigned HasInstructions : 1;
+
+ unsigned IsRegistered : 1;
+
+ FragmentListType Fragments;
+
+ /// Mapping from subsection number to insertion point for subsection numbers
+ /// below that number.
+ SmallVector<std::pair<unsigned, MCFragment *>, 1> SubsectionFragmentMap;
protected:
- MCSection(SectionVariant V, SectionKind K, MCSymbol *Begin)
- : Begin(Begin), Variant(V), Kind(K) {}
+ MCSection(SectionVariant V, SectionKind K, MCSymbol *Begin);
SectionVariant Variant;
SectionKind Kind;
unsigned getOrdinal() const { return Ordinal; }
void setOrdinal(unsigned Value) { Ordinal = Value; }
+ unsigned getLayoutOrder() const { return LayoutOrder; }
+ void setLayoutOrder(unsigned Value) { LayoutOrder = Value; }
+
+ BundleLockStateType getBundleLockState() const { return BundleLockState; }
+ void setBundleLockState(BundleLockStateType NewState);
+ bool isBundleLocked() const { return BundleLockState != NotBundleLocked; }
+
+ bool isBundleGroupBeforeFirstInst() const {
+ return BundleGroupBeforeFirstInst;
+ }
+ void setBundleGroupBeforeFirstInst(bool IsFirst) {
+ BundleGroupBeforeFirstInst = IsFirst;
+ }
+
+ bool hasInstructions() const { return HasInstructions; }
+ void setHasInstructions(bool Value) { HasInstructions = Value; }
+
+ bool isRegistered() const { return IsRegistered; }
+ void setIsRegistered(bool Value) { IsRegistered = Value; }
+
+ MCSection::FragmentListType &getFragmentList() { return Fragments; }
+ const MCSection::FragmentListType &getFragmentList() const {
+ return const_cast<MCSection *>(this)->getFragmentList();
+ }
+
+ MCSection::iterator begin();
+ MCSection::const_iterator begin() const {
+ return const_cast<MCSection *>(this)->begin();
+ }
+
+ MCSection::iterator end();
+ MCSection::const_iterator end() const {
+ return const_cast<MCSection *>(this)->end();
+ }
+
+ MCSection::reverse_iterator rbegin();
+ MCSection::const_reverse_iterator rbegin() const {
+ return const_cast<MCSection *>(this)->rbegin();
+ }
+
+ MCSection::reverse_iterator rend();
+ MCSection::const_reverse_iterator rend() const {
+ return const_cast<MCSection *>(this)->rend();
+ }
+
+ MCSection::iterator getSubsectionInsertionPoint(unsigned Subsection);
+
+ void dump();
+
virtual void PrintSwitchToSection(const MCAsmInfo &MAI, raw_ostream &OS,
const MCExpr *Subsection) const = 0;