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authorBill Wendling <isanbard@gmail.com>2021-08-03 12:49:39 -0700
committerBill Wendling <isanbard@gmail.com>2021-08-05 12:05:50 -0700
commit4d293f215dfb6ab6af966175717e86468f708b1c (patch)
tree491ad4cd6e5a93fd345fe31406633dc1fff80914 /llvm/tools/llvm-diff/lib/DiffLog.h
parent98f38c151b5a8272c7e9a609f6c7c71623fb652b (diff)
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[llvm-diff] Create libLLVMDiff library
Some tools may want to use the LLVM "diff" code. Move the code into a library for easy use. No functionality change intende. Differential Revision: https://reviews.llvm.org/D107392
Diffstat (limited to 'llvm/tools/llvm-diff/lib/DiffLog.h')
-rw-r--r--llvm/tools/llvm-diff/lib/DiffLog.h83
1 files changed, 83 insertions, 0 deletions
diff --git a/llvm/tools/llvm-diff/lib/DiffLog.h b/llvm/tools/llvm-diff/lib/DiffLog.h
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+++ b/llvm/tools/llvm-diff/lib/DiffLog.h
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+//===-- DiffLog.h - Difference Log Builder and accessories ------*- 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 header defines the interface to the LLVM difference log builder.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_TOOLS_LLVM_DIFF_DIFFLOG_H
+#define LLVM_TOOLS_LLVM_DIFF_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<const Value *, 4> Arguments;
+
+ public:
+ LogBuilder(Consumer &c, StringRef Format) : consumer(&c), Format(Format) {}
+ LogBuilder(LogBuilder &&L)
+ : consumer(L.consumer), Format(L.Format),
+ Arguments(std::move(L.Arguments)) {
+ L.consumer = nullptr;
+ }
+
+ LogBuilder &operator<<(const Value *V) {
+ Arguments.push_back(V);
+ return *this;
+ }
+
+ ~LogBuilder();
+
+ StringRef getFormat() const;
+ unsigned getNumArguments() const;
+ const Value *getArgument(unsigned I) const;
+ };
+
+ /// A temporary-object class for building up diff messages.
+ class DiffLogBuilder {
+ typedef std::pair<const Instruction *, const Instruction *> DiffRecord;
+ SmallVector<DiffRecord, 20> Diff;
+
+ Consumer &consumer;
+
+ public:
+ DiffLogBuilder(Consumer &c) : consumer(c) {}
+ ~DiffLogBuilder();
+
+ void addMatch(const Instruction *L, const Instruction *R);
+ // HACK: VS 2010 has a bug in the stdlib that requires this.
+ void addLeft(const Instruction *L);
+ void addRight(const Instruction *R);
+
+ unsigned getNumLines() const;
+ DiffChange getLineKind(unsigned I) const;
+ const Instruction *getLeft(unsigned I) const;
+ const Instruction *getRight(unsigned I) const;
+ };
+
+}
+
+#endif