Import prebuilt clang toolchain for linux.
diff --git a/linux-x64/clang/include/llvm/MC/MCLinkerOptimizationHint.h b/linux-x64/clang/include/llvm/MC/MCLinkerOptimizationHint.h
new file mode 100644
index 0000000..f0fd07f
--- /dev/null
+++ b/linux-x64/clang/include/llvm/MC/MCLinkerOptimizationHint.h
@@ -0,0 +1,187 @@
+//===- MCLinkerOptimizationHint.h - LOH interface ---------------*- 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 some helpers classes to handle Linker Optimization Hint
+// (LOH).
+//
+// FIXME: LOH interface supports only MachO format at the moment.
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_MC_MCLINKEROPTIMIZATIONHINT_H
+#define LLVM_MC_MCLINKEROPTIMIZATIONHINT_H
+
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/StringSwitch.h"
+#include "llvm/Support/raw_ostream.h"
+#include <cassert>
+#include <cstdint>
+
+namespace llvm {
+
+class MachObjectWriter;
+class MCAsmLayout;
+class MCSymbol;
+
+/// Linker Optimization Hint Type.
+enum MCLOHType {
+ MCLOH_AdrpAdrp = 0x1u, ///< Adrp xY, _v1@PAGE -> Adrp xY, _v2@PAGE.
+ MCLOH_AdrpLdr = 0x2u, ///< Adrp _v@PAGE -> Ldr _v@PAGEOFF.
+ MCLOH_AdrpAddLdr = 0x3u, ///< Adrp _v@PAGE -> Add _v@PAGEOFF -> Ldr.
+ MCLOH_AdrpLdrGotLdr = 0x4u, ///< Adrp _v@GOTPAGE -> Ldr _v@GOTPAGEOFF -> Ldr.
+ MCLOH_AdrpAddStr = 0x5u, ///< Adrp _v@PAGE -> Add _v@PAGEOFF -> Str.
+ MCLOH_AdrpLdrGotStr = 0x6u, ///< Adrp _v@GOTPAGE -> Ldr _v@GOTPAGEOFF -> Str.
+ MCLOH_AdrpAdd = 0x7u, ///< Adrp _v@PAGE -> Add _v@PAGEOFF.
+ MCLOH_AdrpLdrGot = 0x8u ///< Adrp _v@GOTPAGE -> Ldr _v@GOTPAGEOFF.
+};
+
+static inline StringRef MCLOHDirectiveName() {
+ return StringRef(".loh");
+}
+
+static inline bool isValidMCLOHType(unsigned Kind) {
+ return Kind >= MCLOH_AdrpAdrp && Kind <= MCLOH_AdrpLdrGot;
+}
+
+static inline int MCLOHNameToId(StringRef Name) {
+#define MCLOHCaseNameToId(Name) .Case(#Name, MCLOH_ ## Name)
+ return StringSwitch<int>(Name)
+ MCLOHCaseNameToId(AdrpAdrp)
+ MCLOHCaseNameToId(AdrpLdr)
+ MCLOHCaseNameToId(AdrpAddLdr)
+ MCLOHCaseNameToId(AdrpLdrGotLdr)
+ MCLOHCaseNameToId(AdrpAddStr)
+ MCLOHCaseNameToId(AdrpLdrGotStr)
+ MCLOHCaseNameToId(AdrpAdd)
+ MCLOHCaseNameToId(AdrpLdrGot)
+ .Default(-1);
+}
+
+static inline StringRef MCLOHIdToName(MCLOHType Kind) {
+#define MCLOHCaseIdToName(Name) case MCLOH_ ## Name: return StringRef(#Name);
+ switch (Kind) {
+ MCLOHCaseIdToName(AdrpAdrp);
+ MCLOHCaseIdToName(AdrpLdr);
+ MCLOHCaseIdToName(AdrpAddLdr);
+ MCLOHCaseIdToName(AdrpLdrGotLdr);
+ MCLOHCaseIdToName(AdrpAddStr);
+ MCLOHCaseIdToName(AdrpLdrGotStr);
+ MCLOHCaseIdToName(AdrpAdd);
+ MCLOHCaseIdToName(AdrpLdrGot);
+ }
+ return StringRef();
+}
+
+static inline int MCLOHIdToNbArgs(MCLOHType Kind) {
+ switch (Kind) {
+ // LOH with two arguments
+ case MCLOH_AdrpAdrp:
+ case MCLOH_AdrpLdr:
+ case MCLOH_AdrpAdd:
+ case MCLOH_AdrpLdrGot:
+ return 2;
+ // LOH with three arguments
+ case MCLOH_AdrpAddLdr:
+ case MCLOH_AdrpLdrGotLdr:
+ case MCLOH_AdrpAddStr:
+ case MCLOH_AdrpLdrGotStr:
+ return 3;
+ }
+ return -1;
+}
+
+/// Store Linker Optimization Hint information (LOH).
+class MCLOHDirective {
+ MCLOHType Kind;
+
+ /// Arguments of this directive. Order matters.
+ SmallVector<MCSymbol *, 3> Args;
+
+ /// Emit this directive in \p OutStream using the information available
+ /// in the given \p ObjWriter and \p Layout to get the address of the
+ /// arguments within the object file.
+ void emit_impl(raw_ostream &OutStream, const MachObjectWriter &ObjWriter,
+ const MCAsmLayout &Layout) const;
+
+public:
+ using LOHArgs = SmallVectorImpl<MCSymbol *>;
+
+ MCLOHDirective(MCLOHType Kind, const LOHArgs &Args)
+ : Kind(Kind), Args(Args.begin(), Args.end()) {
+ assert(isValidMCLOHType(Kind) && "Invalid LOH directive type!");
+ }
+
+ MCLOHType getKind() const { return Kind; }
+
+ const LOHArgs &getArgs() const { return Args; }
+
+ /// Emit this directive as:
+ /// <kind, numArgs, addr1, ..., addrN>
+ void emit(MachObjectWriter &ObjWriter, const MCAsmLayout &Layout) const;
+
+ /// Get the size in bytes of this directive if emitted in \p ObjWriter with
+ /// the given \p Layout.
+ uint64_t getEmitSize(const MachObjectWriter &ObjWriter,
+ const MCAsmLayout &Layout) const;
+};
+
+class MCLOHContainer {
+ /// Keep track of the emit size of all the LOHs.
+ mutable uint64_t EmitSize = 0;
+
+ /// Keep track of all LOH directives.
+ SmallVector<MCLOHDirective, 32> Directives;
+
+public:
+ using LOHDirectives = SmallVectorImpl<MCLOHDirective>;
+
+ MCLOHContainer() = default;
+
+ /// Const accessor to the directives.
+ const LOHDirectives &getDirectives() const {
+ return Directives;
+ }
+
+ /// Add the directive of the given kind \p Kind with the given arguments
+ /// \p Args to the container.
+ void addDirective(MCLOHType Kind, const MCLOHDirective::LOHArgs &Args) {
+ Directives.push_back(MCLOHDirective(Kind, Args));
+ }
+
+ /// Get the size of the directives if emitted.
+ uint64_t getEmitSize(const MachObjectWriter &ObjWriter,
+ const MCAsmLayout &Layout) const {
+ if (!EmitSize) {
+ for (const MCLOHDirective &D : Directives)
+ EmitSize += D.getEmitSize(ObjWriter, Layout);
+ }
+ return EmitSize;
+ }
+
+ /// Emit all Linker Optimization Hint in one big table.
+ /// Each line of the table is emitted by LOHDirective::emit.
+ void emit(MachObjectWriter &ObjWriter, const MCAsmLayout &Layout) const {
+ for (const MCLOHDirective &D : Directives)
+ D.emit(ObjWriter, Layout);
+ }
+
+ void reset() {
+ Directives.clear();
+ EmitSize = 0;
+ }
+};
+
+// Add types for specialized template using MCSymbol.
+using MCLOHArgs = MCLOHDirective::LOHArgs;
+using MCLOHDirectives = MCLOHContainer::LOHDirectives;
+
+} // end namespace llvm
+
+#endif // LLVM_MC_MCLINKEROPTIMIZATIONHINT_H