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7fc162f893
its own library. These functions are bridging between the bitcode reader and the ll parser which are in different libraries. Previously we didn't have any good library to do this, and instead played fast and loose with a "header only" set of interfaces in the Support library. This really doesn't work well as evidenced by the recent attempt to add timing logic to the these routines. As part of this, make them normal functions rather than weird inline functions, and sink the implementation into the library. Also clean up the header to be nice and minimal. This requires updating lots of build system dependencies to specify that the IRReader library is needed, and several source files to not implicitly rely upon the header file to transitively include all manner of other headers. If you are using IRReader.h, this commit will break you (the header moved) and you'll need to also update your library usage to include 'irreader'. I will commit the corresponding change to Clang momentarily. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177971 91177308-0d34-0410-b5e6-96231b3b80d8
97 lines
3.1 KiB
C++
97 lines
3.1 KiB
C++
//===-- llvm-diff.cpp - Module comparator command-line driver ---*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the command-line driver for the difference engine.
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//
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//===----------------------------------------------------------------------===//
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#include "DiffLog.h"
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#include "DifferenceEngine.h"
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/Module.h"
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#include "llvm/IR/Type.h"
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#include "llvm/IRReader/IRReader.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/SourceMgr.h"
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#include "llvm/Support/raw_ostream.h"
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#include <string>
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#include <utility>
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using namespace llvm;
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/// Reads a module from a file. On error, messages are written to stderr
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/// and null is returned.
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static Module *ReadModule(LLVMContext &Context, StringRef Name) {
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SMDiagnostic Diag;
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Module *M = ParseIRFile(Name, Diag, Context);
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if (!M)
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Diag.print("llvm-diff", errs());
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return M;
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}
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static void diffGlobal(DifferenceEngine &Engine, Module *L, Module *R,
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StringRef Name) {
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// Drop leading sigils from the global name.
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if (Name.startswith("@")) Name = Name.substr(1);
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Function *LFn = L->getFunction(Name);
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Function *RFn = R->getFunction(Name);
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if (LFn && RFn)
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Engine.diff(LFn, RFn);
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else if (!LFn && !RFn)
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errs() << "No function named @" << Name << " in either module\n";
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else if (!LFn)
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errs() << "No function named @" << Name << " in left module\n";
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else
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errs() << "No function named @" << Name << " in right module\n";
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}
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static cl::opt<std::string> LeftFilename(cl::Positional,
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cl::desc("<first file>"),
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cl::Required);
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static cl::opt<std::string> RightFilename(cl::Positional,
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cl::desc("<second file>"),
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cl::Required);
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static cl::list<std::string> GlobalsToCompare(cl::Positional,
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cl::desc("<globals to compare>"));
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int main(int argc, char **argv) {
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cl::ParseCommandLineOptions(argc, argv);
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LLVMContext Context;
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// Load both modules. Die if that fails.
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Module *LModule = ReadModule(Context, LeftFilename);
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Module *RModule = ReadModule(Context, RightFilename);
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if (!LModule || !RModule) return 1;
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DiffConsumer Consumer;
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DifferenceEngine Engine(Consumer);
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// If any global names were given, just diff those.
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if (!GlobalsToCompare.empty()) {
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for (unsigned I = 0, E = GlobalsToCompare.size(); I != E; ++I)
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diffGlobal(Engine, LModule, RModule, GlobalsToCompare[I]);
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// Otherwise, diff everything in the module.
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} else {
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Engine.diff(LModule, RModule);
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}
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delete LModule;
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delete RModule;
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return Consumer.hadDifferences();
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}
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