Fix pr24486.

[oota-llvm.git] / include / llvm / MC / MCSection.h

diff --git a/include/llvm/MC/MCSection.h b/include/llvm/MC/MCSection.h
index 1e8e4f13225be2b5645432eff8d9f99c3ca08c1d..f5490fcd173a1b9cd9d2f77bc290f9a1ce54348c 100644 (file)
--- a/include/llvm/MC/MCSection.h
+++ b/include/llvm/MC/MCSection.h
@@ -14,31 +14,95 @@
 #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/MCAssembler.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;
 
   MCSymbol *Begin;
+  MCSymbol *End = nullptr;
+  /// The alignment requirement of this section.
+  unsigned Alignment = 1;
+  /// The section index in the assemblers section list.
+  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;
+
+  MCDummyFragment DummyFragment;
+
+  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;
 
@@ -49,7 +113,74 @@ public:
 
   SectionVariant getVariant() const { return Variant; }
 
-  MCSymbol *getBeginSymbol() const { return Begin; }
+  MCSymbol *getBeginSymbol() { return Begin; }
+  const MCSymbol *getBeginSymbol() const {
+    return const_cast<MCSection *>(this)->getBeginSymbol();
+  }
+  void setBeginSymbol(MCSymbol *Sym) {
+    assert(!Begin);
+    Begin = Sym;
+  }
+  MCSymbol *getEndSymbol(MCContext &Ctx);
+  bool hasEnded() const;
+
+  unsigned getAlignment() const { return Alignment; }
+  void setAlignment(unsigned Value) { Alignment = Value; }
+
+  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();
+  }
+
+  const MCDummyFragment &getDummyFragment() const { return DummyFragment; }
+  MCDummyFragment &getDummyFragment() { return DummyFragment; }
+
+  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;