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/DiffLog.h b/tools/llvm-diff/DiffLog.h
new file mode 100644
index 0000000..43e318a
--- /dev/null
+++ b/tools/llvm-diff/DiffLog.h
@@ -0,0 +1,80 @@
+//===-- DiffLog.h - Difference Log Builder and accessories ------*- 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 log builder.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef _LLVM_DIFFLOG_H_
+#define _LLVM_DIFFLOG_H_
+
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/StringRef.h"
+
+namespace llvm {
+ class Instruction;
+ class Value;
+ class Consumer;
+
+ /// Trichotomy assumption
+ enum DiffChange { DC_match, DC_left, DC_right };
+
+ /// A temporary-object class for building up log messages.
+ class LogBuilder {
+ Consumer &consumer;
+
+ /// The use of a stored StringRef here is okay because
+ /// LogBuilder should be used only as a temporary, and as a
+ /// temporary it will be destructed before whatever temporary
+ /// might be initializing this format.
+ StringRef Format;
+
+ SmallVector<Value*, 4> Arguments;
+
+ public:
+ LogBuilder(Consumer &c, StringRef Format)
+ : consumer(c), Format(Format) {}
+
+ LogBuilder &operator<<(Value *V) {
+ Arguments.push_back(V);
+ return *this;
+ }
+
+ ~LogBuilder();
+
+ StringRef getFormat() const;
+ unsigned getNumArguments() const;
+ Value *getArgument(unsigned I) const;
+ };
+
+ /// A temporary-object class for building up diff messages.
+ class DiffLogBuilder {
+ typedef std::pair<Instruction*,Instruction*> DiffRecord;
+ SmallVector<DiffRecord, 20> Diff;
+
+ Consumer &consumer;
+
+ public:
+ DiffLogBuilder(Consumer &c) : consumer(c) {}
+ ~DiffLogBuilder();
+
+ void addMatch(Instruction *L, Instruction *R);
+ // HACK: VS 2010 has a bug in the stdlib that requires this.
+ void addLeft(Instruction *L);
+ void addRight(Instruction *R);
+
+ unsigned getNumLines() const;
+ DiffChange getLineKind(unsigned I) const;
+ Instruction *getLeft(unsigned I) const;
+ Instruction *getRight(unsigned I) const;
+ };
+
+}
+
+#endif