Import prebuilt clang toolchain for linux.
diff --git a/linux-x64/clang/include/llvm/MC/MCSection.h b/linux-x64/clang/include/llvm/MC/MCSection.h
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+//===- MCSection.h - Machine Code Sections ----------------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares the MCSection class.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_MC_MCSECTION_H
+#define LLVM_MC_MCSECTION_H
+
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/ilist.h"
+#include "llvm/MC/MCFragment.h"
+#include "llvm/MC/SectionKind.h"
+#include <cassert>
+#include <utility>
+
+namespace llvm {
+
+class MCAsmInfo;
+class MCContext;
+class MCExpr;
+class MCSymbol;
+class raw_ostream;
+class Triple;
+
+template <> struct ilist_alloc_traits<MCFragment> {
+ static void deleteNode(MCFragment *V);
+};
+
+/// 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, SV_Wasm };
+
+ /// \brief Express the state of bundle locked groups while emitting code.
+ enum BundleLockStateType {
+ NotBundleLocked,
+ BundleLocked,
+ BundleLockedAlignToEnd
+ };
+
+ using FragmentListType = iplist<MCFragment>;
+
+ using const_iterator = FragmentListType::const_iterator;
+ using iterator = FragmentListType::iterator;
+
+ using const_reverse_iterator = FragmentListType::const_reverse_iterator;
+ using reverse_iterator = FragmentListType::reverse_iterator;
+
+private:
+ 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.
+ bool BundleGroupBeforeFirstInst : 1;
+
+ /// Whether this section has had instructions emitted into it.
+ bool HasInstructions : 1;
+
+ bool 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:
+ SectionVariant Variant;
+ SectionKind Kind;
+
+ MCSection(SectionVariant V, SectionKind K, MCSymbol *Begin);
+ ~MCSection();
+
+public:
+ MCSection(const MCSection &) = delete;
+ MCSection &operator=(const MCSection &) = delete;
+
+ SectionKind getKind() const { return Kind; }
+
+ SectionVariant getVariant() const { return Variant; }
+
+ 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();
+ }
+
+ /// Support for MCFragment::getNextNode().
+ static FragmentListType MCSection::*getSublistAccess(MCFragment *) {
+ return &MCSection::Fragments;
+ }
+
+ const MCDummyFragment &getDummyFragment() const { return DummyFragment; }
+ MCDummyFragment &getDummyFragment() { return DummyFragment; }
+
+ iterator begin() { return Fragments.begin(); }
+ const_iterator begin() const { return Fragments.begin(); }
+
+ iterator end() { return Fragments.end(); }
+ const_iterator end() const { return Fragments.end(); }
+
+ reverse_iterator rbegin() { return Fragments.rbegin(); }
+ const_reverse_iterator rbegin() const { return Fragments.rbegin(); }
+
+ reverse_iterator rend() { return Fragments.rend(); }
+ const_reverse_iterator rend() const { return Fragments.rend(); }
+
+ MCSection::iterator getSubsectionInsertionPoint(unsigned Subsection);
+
+ void dump() const;
+
+ virtual void PrintSwitchToSection(const MCAsmInfo &MAI, const Triple &T,
+ raw_ostream &OS,
+ const MCExpr *Subsection) const = 0;
+
+ /// Return true if a .align directive should use "optimized nops" to fill
+ /// instead of 0s.
+ virtual bool UseCodeAlign() const = 0;
+
+ /// Check whether this section is "virtual", that is has no actual object
+ /// file contents.
+ virtual bool isVirtualSection() const = 0;
+};
+
+} // end namespace llvm
+
+#endif // LLVM_MC_MCSECTION_H