This patch is a big refactoring of llvm-diff. It doesn't add new features, but it re-organizes the old features, so I can insert the MetadataEngine to use the same infrastructure.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127627 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/llvm-diff/DiffConsumer.h b/tools/llvm-diff/DiffConsumer.h
new file mode 100644
index 0000000..e5510cc
--- /dev/null
+++ b/tools/llvm-diff/DiffConsumer.h
@@ -0,0 +1,91 @@
+//===-- DiffConsumer.h - Difference Consumer --------------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This header defines the interface to the LLVM difference Consumer
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef _LLVM_DIFFCONSUMER_H_
+#define _LLVM_DIFFCONSUMER_H_
+
+#include "DiffLog.h"
+
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Support/Casting.h"
+
+namespace llvm {
+ class Module;
+ class Value;
+ class Function;
+
+ /// The interface for consumers of difference data.
+ struct Consumer {
+ /// Record that a local context has been entered. Left and
+ /// Right are IR "containers" of some sort which are being
+ /// considered for structural equivalence: global variables,
+ /// functions, blocks, instructions, etc.
+ virtual void enterContext(Value *Left, Value *Right) = 0;
+
+ /// Record that a local context has been exited.
+ virtual void exitContext() = 0;
+
+ /// Record a difference within the current context.
+ virtual void log(StringRef Text) = 0;
+
+ /// Record a formatted difference within the current context.
+ virtual void logf(const LogBuilder &Log) = 0;
+
+ /// Record a line-by-line instruction diff.
+ virtual void logd(const DiffLogBuilder &Log) = 0;
+
+ protected:
+ virtual ~Consumer() {}
+ };
+
+ class DiffConsumer : public Consumer {
+ private:
+ struct DiffContext {
+ DiffContext(Value *L, Value *R)
+ : L(L), R(R), Differences(false), IsFunction(isa<Function>(L)) {}
+ Value *L;
+ Value *R;
+ bool Differences;
+ bool IsFunction;
+ DenseMap<Value*,unsigned> LNumbering;
+ DenseMap<Value*,unsigned> RNumbering;
+ };
+
+ raw_ostream &out;
+ Module *LModule;
+ Module *RModule;
+ SmallVector<DiffContext, 5> contexts;
+ bool Differences;
+ unsigned Indent;
+
+ void printValue(Value *V, bool isL);
+ void header();
+ void indent();
+
+ public:
+ DiffConsumer(Module *L, Module *R)
+ : out(errs()), LModule(L), RModule(R), Differences(false), Indent(0) {}
+
+ bool hadDifferences() const;
+ void enterContext(Value *L, Value *R);
+ void exitContext();
+ void log(StringRef text);
+ void logf(const LogBuilder &Log);
+ void logd(const DiffLogBuilder &Log);
+ };
+}
+
+#endif