Merge "Update prebuilt Clang to r353983." into p9.0HEADp9.0-backupp9.0

1 files changed, 357 insertions, 0 deletions

diff --git a/clang-r353983/include/llvm/IR/LLVMContext.h b/clang-r353983/include/llvm/IR/LLVMContext.h
new file mode 100644
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+++ b/clang-r353983/include/llvm/IR/LLVMContext.h
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+//===- llvm/LLVMContext.h - Class for managing "global" state ---*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares LLVMContext, a container of "global" state in LLVM, such
+// as the global type and constant uniquing tables.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_IR_LLVMCONTEXT_H
+#define LLVM_IR_LLVMCONTEXT_H
+
+#include "llvm-c/Types.h"
+#include "llvm/IR/DiagnosticHandler.h"
+#include "llvm/Support/CBindingWrapping.h"
+#include "llvm/Support/Options.h"
+#include <cstdint>
+#include <memory>
+#include <string>
+
+namespace llvm {
+
+class DiagnosticInfo;
+enum DiagnosticSeverity : char;
+class Function;
+class Instruction;
+class LLVMContextImpl;
+class Module;
+class OptPassGate;
+template <typename T> class SmallVectorImpl;
+class SMDiagnostic;
+class StringRef;
+class Twine;
+
+namespace yaml {
+
+class Output;
+
+} // end namespace yaml
+
+namespace SyncScope {
+
+typedef uint8_t ID;
+
+/// Known synchronization scope IDs, which always have the same value.  All
+/// synchronization scope IDs that LLVM has special knowledge of are listed
+/// here.  Additionally, this scheme allows LLVM to efficiently check for
+/// specific synchronization scope ID without comparing strings.
+enum {
+  /// Synchronized with respect to signal handlers executing in the same thread.
+  SingleThread = 0,
+
+  /// Synchronized with respect to all concurrently executing threads.
+  System = 1
+};
+
+} // end namespace SyncScope
+
+/// This is an important class for using LLVM in a threaded context.  It
+/// (opaquely) owns and manages the core "global" data of LLVM's core
+/// infrastructure, including the type and constant uniquing tables.
+/// LLVMContext itself provides no locking guarantees, so you should be careful
+/// to have one context per thread.
+class LLVMContext {
+public:
+  LLVMContextImpl *const pImpl;
+  LLVMContext();
+  LLVMContext(LLVMContext &) = delete;
+  LLVMContext &operator=(const LLVMContext &) = delete;
+  ~LLVMContext();
+
+  // Pinned metadata names, which always have the same value.  This is a
+  // compile-time performance optimization, not a correctness optimization.
+  enum : unsigned {
+    MD_dbg = 0,                       // "dbg"
+    MD_tbaa = 1,                      // "tbaa"
+    MD_prof = 2,                      // "prof"
+    MD_fpmath = 3,                    // "fpmath"
+    MD_range = 4,                     // "range"
+    MD_tbaa_struct = 5,               // "tbaa.struct"
+    MD_invariant_load = 6,            // "invariant.load"
+    MD_alias_scope = 7,               // "alias.scope"
+    MD_noalias = 8,                   // "noalias",
+    MD_nontemporal = 9,               // "nontemporal"
+    MD_mem_parallel_loop_access = 10, // "llvm.mem.parallel_loop_access"
+    MD_nonnull = 11,                  // "nonnull"
+    MD_dereferenceable = 12,          // "dereferenceable"
+    MD_dereferenceable_or_null = 13,  // "dereferenceable_or_null"
+    MD_make_implicit = 14,            // "make.implicit"
+    MD_unpredictable = 15,            // "unpredictable"
+    MD_invariant_group = 16,          // "invariant.group"
+    MD_align = 17,                    // "align"
+    MD_loop = 18,                     // "llvm.loop"
+    MD_type = 19,                     // "type"
+    MD_section_prefix = 20,           // "section_prefix"
+    MD_absolute_symbol = 21,          // "absolute_symbol"
+    MD_associated = 22,               // "associated"
+    MD_callees = 23,                  // "callees"
+    MD_irr_loop = 24,                 // "irr_loop"
+    MD_access_group = 25,             // "llvm.access.group"
+    MD_callback = 26,                 // "callback"
+  };
+
+  /// Known operand bundle tag IDs, which always have the same value.  All
+  /// operand bundle tags that LLVM has special knowledge of are listed here.
+  /// Additionally, this scheme allows LLVM to efficiently check for specific
+  /// operand bundle tags without comparing strings.
+  enum : unsigned {
+    OB_deopt = 0,         // "deopt"
+    OB_funclet = 1,       // "funclet"
+    OB_gc_transition = 2, // "gc-transition"
+  };
+
+  /// getMDKindID - Return a unique non-zero ID for the specified metadata kind.
+  /// This ID is uniqued across modules in the current LLVMContext.
+  unsigned getMDKindID(StringRef Name) const;
+
+  /// getMDKindNames - Populate client supplied SmallVector with the name for
+  /// custom metadata IDs registered in this LLVMContext.
+  void getMDKindNames(SmallVectorImpl<StringRef> &Result) const;
+
+  /// getOperandBundleTags - Populate client supplied SmallVector with the
+  /// bundle tags registered in this LLVMContext.  The bundle tags are ordered
+  /// by increasing bundle IDs.
+  /// \see LLVMContext::getOperandBundleTagID
+  void getOperandBundleTags(SmallVectorImpl<StringRef> &Result) const;
+
+  /// getOperandBundleTagID - Maps a bundle tag to an integer ID.  Every bundle
+  /// tag registered with an LLVMContext has an unique ID.
+  uint32_t getOperandBundleTagID(StringRef Tag) const;
+
+  /// getOrInsertSyncScopeID - Maps synchronization scope name to
+  /// synchronization scope ID.  Every synchronization scope registered with
+  /// LLVMContext has unique ID except pre-defined ones.
+  SyncScope::ID getOrInsertSyncScopeID(StringRef SSN);
+
+  /// getSyncScopeNames - Populates client supplied SmallVector with
+  /// synchronization scope names registered with LLVMContext.  Synchronization
+  /// scope names are ordered by increasing synchronization scope IDs.
+  void getSyncScopeNames(SmallVectorImpl<StringRef> &SSNs) const;
+
+  /// Define the GC for a function
+  void setGC(const Function &Fn, std::string GCName);
+
+  /// Return the GC for a function
+  const std::string &getGC(const Function &Fn);
+
+  /// Remove the GC for a function
+  void deleteGC(const Function &Fn);
+
+  /// Return true if the Context runtime configuration is set to discard all
+  /// value names. When true, only GlobalValue names will be available in the
+  /// IR.
+  bool shouldDiscardValueNames() const;
+
+  /// Set the Context runtime configuration to discard all value name (but
+  /// GlobalValue). Clients can use this flag to save memory and runtime,
+  /// especially in release mode.
+  void setDiscardValueNames(bool Discard);
+
+  /// Whether there is a string map for uniquing debug info
+  /// identifiers across the context.  Off by default.
+  bool isODRUniquingDebugTypes() const;
+  void enableDebugTypeODRUniquing();
+  void disableDebugTypeODRUniquing();
+
+  using InlineAsmDiagHandlerTy = void (*)(const SMDiagnostic&, void *Context,
+                                          unsigned LocCookie);
+
+  /// Defines the type of a yield callback.
+  /// \see LLVMContext::setYieldCallback.
+  using YieldCallbackTy = void (*)(LLVMContext *Context, void *OpaqueHandle);
+
+  /// setInlineAsmDiagnosticHandler - This method sets a handler that is invoked
+  /// when problems with inline asm are detected by the backend.  The first
+  /// argument is a function pointer and the second is a context pointer that
+  /// gets passed into the DiagHandler.
+  ///
+  /// LLVMContext doesn't take ownership or interpret either of these
+  /// pointers.
+  void setInlineAsmDiagnosticHandler(InlineAsmDiagHandlerTy DiagHandler,
+                                     void *DiagContext = nullptr);
+
+  /// getInlineAsmDiagnosticHandler - Return the diagnostic handler set by
+  /// setInlineAsmDiagnosticHandler.
+  InlineAsmDiagHandlerTy getInlineAsmDiagnosticHandler() const;
+
+  /// getInlineAsmDiagnosticContext - Return the diagnostic context set by
+  /// setInlineAsmDiagnosticHandler.
+  void *getInlineAsmDiagnosticContext() const;
+
+  /// setDiagnosticHandlerCallBack - This method sets a handler call back
+  /// that is invoked when the backend needs to report anything to the user.
+  /// The first argument is a function pointer and the second is a context pointer
+  /// that gets passed into the DiagHandler.  The third argument should be set to
+  /// true if the handler only expects enabled diagnostics.
+  ///
+  /// LLVMContext doesn't take ownership or interpret either of these
+  /// pointers.
+  void setDiagnosticHandlerCallBack(
+      DiagnosticHandler::DiagnosticHandlerTy DiagHandler,
+      void *DiagContext = nullptr, bool RespectFilters = false);
+
+  /// setDiagnosticHandler - This method sets unique_ptr to object of DiagnosticHandler
+  /// to provide custom diagnostic handling. The first argument is unique_ptr of object
+  /// of type DiagnosticHandler or a derived of that.   The third argument should be
+  /// set to true if the handler only expects enabled diagnostics.
+  ///
+  /// Ownership of this pointer is moved to LLVMContextImpl.
+  void setDiagnosticHandler(std::unique_ptr<DiagnosticHandler> &&DH,
+                            bool RespectFilters = false);
+
+  /// getDiagnosticHandlerCallBack - Return the diagnostic handler call back set by
+  /// setDiagnosticHandlerCallBack.
+  DiagnosticHandler::DiagnosticHandlerTy getDiagnosticHandlerCallBack() const;
+
+  /// getDiagnosticContext - Return the diagnostic context set by
+  /// setDiagnosticContext.
+  void *getDiagnosticContext() const;
+
+  /// getDiagHandlerPtr - Returns const raw pointer of DiagnosticHandler set by
+  /// setDiagnosticHandler.
+  const DiagnosticHandler *getDiagHandlerPtr() const;
+
+  /// getDiagnosticHandler - transfers owenership of DiagnosticHandler unique_ptr
+  /// to caller.
+  std::unique_ptr<DiagnosticHandler> getDiagnosticHandler();
+
+  /// Return if a code hotness metric should be included in optimization
+  /// diagnostics.
+  bool getDiagnosticsHotnessRequested() const;
+  /// Set if a code hotness metric should be included in optimization
+  /// diagnostics.
+  void setDiagnosticsHotnessRequested(bool Requested);
+
+  /// Return the minimum hotness value a diagnostic would need in order
+  /// to be included in optimization diagnostics. If there is no minimum, this
+  /// returns None.
+  uint64_t getDiagnosticsHotnessThreshold() const;
+
+  /// Set the minimum hotness value a diagnostic needs in order to be
+  /// included in optimization diagnostics.
+  void setDiagnosticsHotnessThreshold(uint64_t Threshold);
+
+  /// Return the YAML file used by the backend to save optimization
+  /// diagnostics.  If null, diagnostics are not saved in a file but only
+  /// emitted via the diagnostic handler.
+  yaml::Output *getDiagnosticsOutputFile();
+  /// Set the diagnostics output file used for optimization diagnostics.
+  ///
+  /// By default or if invoked with null, diagnostics are not saved in a file
+  /// but only emitted via the diagnostic handler.  Even if an output file is
+  /// set, the handler is invoked for each diagnostic message.
+  void setDiagnosticsOutputFile(std::unique_ptr<yaml::Output> F);
+
+  /// Get the prefix that should be printed in front of a diagnostic of
+  ///        the given \p Severity
+  static const char *getDiagnosticMessagePrefix(DiagnosticSeverity Severity);
+
+  /// Report a message to the currently installed diagnostic handler.
+  ///
+  /// This function returns, in particular in the case of error reporting
+  /// (DI.Severity == \a DS_Error), so the caller should leave the compilation
+  /// process in a self-consistent state, even though the generated code
+  /// need not be correct.
+  ///
+  /// The diagnostic message will be implicitly prefixed with a severity keyword
+  /// according to \p DI.getSeverity(), i.e., "error: " for \a DS_Error,
+  /// "warning: " for \a DS_Warning, and "note: " for \a DS_Note.
+  void diagnose(const DiagnosticInfo &DI);
+
+  /// Registers a yield callback with the given context.
+  ///
+  /// The yield callback function may be called by LLVM to transfer control back
+  /// to the client that invoked the LLVM compilation. This can be used to yield
+  /// control of the thread, or perform periodic work needed by the client.
+  /// There is no guaranteed frequency at which callbacks must occur; in fact,
+  /// the client is not guaranteed to ever receive this callback. It is at the
+  /// sole discretion of LLVM to do so and only if it can guarantee that
+  /// suspending the thread won't block any forward progress in other LLVM
+  /// contexts in the same process.
+  ///
+  /// At a suspend point, the state of the current LLVM context is intentionally
+  /// undefined. No assumptions about it can or should be made. Only LLVM
+  /// context API calls that explicitly state that they can be used during a
+  /// yield callback are allowed to be used. Any other API calls into the
+  /// context are not supported until the yield callback function returns
+  /// control to LLVM. Other LLVM contexts are unaffected by this restriction.
+  void setYieldCallback(YieldCallbackTy Callback, void *OpaqueHandle);
+
+  /// Calls the yield callback (if applicable).
+  ///
+  /// This transfers control of the current thread back to the client, which may
+  /// suspend the current thread. Only call this method when LLVM doesn't hold
+  /// any global mutex or cannot block the execution in another LLVM context.
+  void yield();
+
+  /// emitError - Emit an error message to the currently installed error handler
+  /// with optional location information.  This function returns, so code should
+  /// be prepared to drop the erroneous construct on the floor and "not crash".
+  /// The generated code need not be correct.  The error message will be
+  /// implicitly prefixed with "error: " and should not end with a ".".
+  void emitError(unsigned LocCookie, const Twine &ErrorStr);
+  void emitError(const Instruction *I, const Twine &ErrorStr);
+  void emitError(const Twine &ErrorStr);
+
+  /// Query for a debug option's value.
+  ///
+  /// This function returns typed data populated from command line parsing.
+  template <typename ValT, typename Base, ValT(Base::*Mem)>
+  ValT getOption() const {
+    return OptionRegistry::instance().template get<ValT, Base, Mem>();
+  }
+
+  /// Access the object which can disable optional passes and individual
+  /// optimizations at compile time.
+  OptPassGate &getOptPassGate() const;
+
+  /// Set the object which can disable optional passes and individual
+  /// optimizations at compile time.
+  ///
+  /// The lifetime of the object must be guaranteed to extend as long as the
+  /// LLVMContext is used by compilation.
+  void setOptPassGate(OptPassGate&);
+
+private:
+  // Module needs access to the add/removeModule methods.
+  friend class Module;
+
+  /// addModule - Register a module as being instantiated in this context.  If
+  /// the context is deleted, the module will be deleted as well.
+  void addModule(Module*);
+
+  /// removeModule - Unregister a module from this context.
+  void removeModule(Module*);
+};
+
+// Create wrappers for C Binding types (see CBindingWrapping.h).
+DEFINE_SIMPLE_CONVERSION_FUNCTIONS(LLVMContext, LLVMContextRef)
+
+/* Specialized opaque context conversions.
+ */
+inline LLVMContext **unwrap(LLVMContextRef* Tys) {
+  return reinterpret_cast<LLVMContext**>(Tys);
+}
+
+inline LLVMContextRef *wrap(const LLVMContext **Tys) {
+  return reinterpret_cast<LLVMContextRef*>(const_cast<LLVMContext**>(Tys));
+}
+
+} // end namespace llvm
+
+#endif // LLVM_IR_LLVMCONTEXT_H