Created Ice::Instrumentation base class and accompanying hooks.

src/IceGlobalContext.h

 //===- subzero/src/IceGlobalContext.h - Global context defs -----*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
 /// \brief Declares aspects of the compilation that persist across multiple
 /// functions.
 ///
 //===----------------------------------------------------------------------===//
 
 #ifndef SUBZERO_SRC_ICEGLOBALCONTEXT_H
 #define SUBZERO_SRC_ICEGLOBALCONTEXT_H
 
 #include "IceDefs.h"
 #include "IceClFlags.h"
+#include "IceInstrumentation.h"
 #include "IceIntrinsics.h"
 #include "IceRNG.h"
 #include "IceStringPool.h"
 #include "IceSwitchLowering.h"
 #include "IceTargetLowering.def"
 #include "IceThreading.h"
 #include "IceTimerTree.h"
 #include "IceTypes.h"
 #include "IceUtils.h"
 
 #include <array>
 #include <atomic>
 #include <cassert>
 #include <functional>
 #include <memory>
 #include <mutex>
 #include <thread>
 #include <type_traits>
 #include <utility>
 #include <vector>
 
 namespace Ice {
 
 class ConstantPool;
 class EmitterWorkItem;
 class FuncSigType;
+class Instrumentation;
 
 // Runtime helper function IDs
 
 enum class RuntimeHelper {
 #define X(Tag, Name) H_##Tag,
   RUNTIME_HELPER_FUNCTIONS_TABLE
 #undef X
       H_Num
 };
 
@@ skipping 362 matching lines @@
       ThreadContext *WorkerTLS = new ThreadContext();
       Timers->initInto(WorkerTLS->Timers);
       AllThreadContexts.push_back(WorkerTLS);
       EmitterThreads.push_back(
           std::thread(&GlobalContext::emitterWrapper, this, WorkerTLS));
     }
   }
 
   void waitForWorkerThreads();
 
+  /// sets the instrumentation object to use.
+  void setInstrumentation(std::unique_ptr<Instrumentation> Instr) {
+    if (!BuildDefs::minimal())
+      Instrumentor = std::move(Instr);
+  }
+
+  void instrumentFunc(Cfg *Func) {
+    if (!BuildDefs::minimal() && Instrumentor)
+      Instrumentor->instrumentFunc(Func);
+  }
+
   /// Translation thread startup routine.
   void translateFunctionsWrapper(ThreadContext *MyTLS) {
     ICE_TLS_SET_FIELD(TLS, MyTLS);
     translateFunctions();
   }
   /// Translate functions from the Cfg queue until the queue is empty.
   void translateFunctions();
 
   /// Emitter thread startup routine.
   void emitterWrapper(ThreadContext *MyTLS) {
@@ skipping 106 matching lines @@
   BoundedProducerConsumerQueue<OptWorkItem, MaxOptQSize> OptQ;
   BoundedProducerConsumerQueue<EmitterWorkItem> EmitQ;
   // DataLowering is only ever used by a single thread at a time (either in
   // emitItems(), or in IceCompiler::run before the compilation is over.)
   // TODO(jpp): move to EmitterContext.
   std::unique_ptr<TargetDataLowering> DataLowering;
   /// If !HasEmittedCode, SubZero will accumulate all Globals (which are "true"
   /// program global variables) until the first code WorkItem is seen.
   // TODO(jpp): move to EmitterContext.
   bool HasSeenCode = false;
+  // If Instrumentor is not empty then it will be used to instrument globals and
+  // CFGs.
+  std::unique_ptr<Instrumentation> Instrumentor = nullptr;
   // TODO(jpp): move to EmitterContext.
   VariableDeclaration *ProfileBlockInfoVarDecl = nullptr;
   std::vector<VariableDeclaration *> ProfileBlockInfos;
   /// Indicates if global variable declarations can be disposed of right after
   /// lowering.
   bool DisposeGlobalVariablesAfterLowering = true;
   Constant *ConstZeroForType[IceType_NUM];
   Constant *ConstantTrue;
   // Holds the constants representing each runtime helper function.
   Constant *RuntimeHelperFunc[static_cast<size_t>(RuntimeHelper::H_Num)];
@@ skipping 111 matching lines @@
   explicit OstreamLocker(GlobalContext *Ctx) : Ctx(Ctx) { Ctx->lockStr(); }
   ~OstreamLocker() { Ctx->unlockStr(); }
 
 private:
   GlobalContext *const Ctx;
 };
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICEGLOBALCONTEXT_H