[Support] Lazy load of dbghlp.dll on Windows

[oota-llvm.git] / tools / llvm-diff / DifferenceEngine.h

diff --git a/tools/llvm-diff/DifferenceEngine.h b/tools/llvm-diff/DifferenceEngine.h
index 5b4f80b99e55760c0cc539b2d5043ec35f2f8493..f0d831144a4cb7caaf16e8ebe27d41c7067be935 100644 (file)
--- a/tools/llvm-diff/DifferenceEngine.h
+++ b/tools/llvm-diff/DifferenceEngine.h
@@ -12,14 +12,13 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef _LLVM_DIFFERENCE_ENGINE_H_
-#define _LLVM_DIFFERENCE_ENGINE_H_
+#ifndef LLVM_TOOLS_LLVM_DIFF_DIFFERENCEENGINE_H
+#define LLVM_TOOLS_LLVM_DIFF_DIFFERENCEENGINE_H
 
+#include "DiffConsumer.h"
+#include "DiffLog.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringRef.h"
-#include "DiffLog.h"
-#include "DiffConsumer.h"
-
 #include <utility>
 
 namespace llvm {
@@ -50,15 +49,17 @@ namespace llvm {
 
     /// An oracle for answering whether two values are equivalent as
     /// operands.
-    struct Oracle {
+    class Oracle {
+      virtual void anchor();
+    public:
       virtual bool operator()(Value *L, Value *R) = 0;
 
     protected:
       virtual ~Oracle() {}
     };
 
-    DifferenceEngine(LLVMContext &context, Consumer &consumer)
-      : context(context), consumer(consumer), globalValueOracle(0) {}
+    DifferenceEngine(Consumer &consumer)
+      : consumer(consumer), globalValueOracle(nullptr) {}
 
     void diff(Module *L, Module *R);
     void diff(Function *L, Function *R);
@@ -82,7 +83,6 @@ namespace llvm {
     bool equivalentAsOperands(GlobalValue *L, GlobalValue *R);
 
   private:
-    LLVMContext &context;
     Consumer &consumer;
     Oracle *globalValueOracle;
   };