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2d5487cf44
Summary: This is the first step in also serializing the index out to LLVM assembly. The per-module summary written to bitcode is moved out of the bitcode writer and to a new analysis pass (ModuleSummaryIndexWrapperPass). The pass itself uses a new builder class to compute index, and the builder class is used directly in places where we don't have a pass manager (e.g. llvm-as). Because we are computing summaries outside of the bitcode writer, we no longer can use value ids created by the bitcode writer's ValueEnumerator. This required changing the reference graph edge type to use a new ValueInfo class holding a union between a GUID (combined index) and Value* (permodule index). The Value* are converted to the appropriate value ID during bitcode writing. Also, this enables removal of the BitWriter library's dependence on the Analysis library that was previously required for the summary computation. Reviewers: joker.eph Subscribers: joker.eph, llvm-commits Differential Revision: http://reviews.llvm.org/D18763 llvm-svn: 265941
135 lines
4.4 KiB
C++
135 lines
4.4 KiB
C++
//===--- llvm-as.cpp - The low-level LLVM assembler -----------------------===//
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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 utility may be invoked in the following manner:
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// llvm-as --help - Output information about command line switches
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// llvm-as [options] - Read LLVM asm from stdin, write bitcode to stdout
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// llvm-as [options] x.ll - Read LLVM asm from the x.ll file, write bitcode
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// to the x.bc file.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Analysis/ModuleSummaryAnalysis.h"
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#include "llvm/AsmParser/Parser.h"
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#include "llvm/Bitcode/ReaderWriter.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/Verifier.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/ManagedStatic.h"
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#include "llvm/Support/PrettyStackTrace.h"
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#include "llvm/Support/Signals.h"
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#include "llvm/Support/SourceMgr.h"
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#include "llvm/Support/SystemUtils.h"
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#include "llvm/Support/ToolOutputFile.h"
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#include <memory>
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using namespace llvm;
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static cl::opt<std::string> InputFilename(cl::Positional,
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cl::desc("<input .llvm file>"),
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cl::init("-"));
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static cl::opt<std::string> OutputFilename("o",
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cl::desc("Override output filename"),
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cl::value_desc("filename"));
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static cl::opt<bool> Force("f", cl::desc("Enable binary output on terminals"));
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static cl::opt<bool> DisableOutput("disable-output", cl::desc("Disable output"),
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cl::init(false));
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static cl::opt<bool> EmitSummaryIndex("module-summary",
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cl::desc("Emit module summary index"),
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cl::init(false));
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static cl::opt<bool> EmitModuleHash("module-hash", cl::desc("Emit module hash"),
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cl::init(false));
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static cl::opt<bool> DumpAsm("d", cl::desc("Print assembly as parsed"),
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cl::Hidden);
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static cl::opt<bool>
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DisableVerify("disable-verify", cl::Hidden,
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cl::desc("Do not run verifier on input LLVM (dangerous!)"));
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static cl::opt<bool> PreserveBitcodeUseListOrder(
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"preserve-bc-uselistorder",
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cl::desc("Preserve use-list order when writing LLVM bitcode."),
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cl::init(true), cl::Hidden);
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static void WriteOutputFile(const Module *M) {
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// Infer the output filename if needed.
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if (OutputFilename.empty()) {
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if (InputFilename == "-") {
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OutputFilename = "-";
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} else {
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StringRef IFN = InputFilename;
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OutputFilename = (IFN.endswith(".ll") ? IFN.drop_back(3) : IFN).str();
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OutputFilename += ".bc";
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}
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}
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std::error_code EC;
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std::unique_ptr<tool_output_file> Out(
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new tool_output_file(OutputFilename, EC, sys::fs::F_None));
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if (EC) {
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errs() << EC.message() << '\n';
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exit(1);
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}
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if (Force || !CheckBitcodeOutputToConsole(Out->os(), true)) {
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std::unique_ptr<ModuleSummaryIndex> Index;
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if (EmitSummaryIndex)
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Index = ModuleSummaryIndexBuilder(M).takeIndex();
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WriteBitcodeToFile(M, Out->os(), PreserveBitcodeUseListOrder, Index.get(),
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EmitModuleHash);
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}
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// Declare success.
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Out->keep();
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}
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int main(int argc, char **argv) {
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// Print a stack trace if we signal out.
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sys::PrintStackTraceOnErrorSignal();
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PrettyStackTraceProgram X(argc, argv);
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LLVMContext &Context = getGlobalContext();
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llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
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cl::ParseCommandLineOptions(argc, argv, "llvm .ll -> .bc assembler\n");
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// Parse the file now...
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SMDiagnostic Err;
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std::unique_ptr<Module> M = parseAssemblyFile(InputFilename, Err, Context);
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if (!M.get()) {
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Err.print(argv[0], errs());
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return 1;
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}
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if (!DisableVerify) {
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std::string ErrorStr;
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raw_string_ostream OS(ErrorStr);
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if (verifyModule(*M.get(), &OS)) {
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errs() << argv[0]
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<< ": assembly parsed, but does not verify as correct!\n";
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errs() << OS.str();
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return 1;
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}
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}
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if (DumpAsm)
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errs() << "Here's the assembly:\n" << *M.get();
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if (!DisableOutput)
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WriteOutputFile(M.get());
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return 0;
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}
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