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8be7707c14
At the same time, fixes InstructionsTest::CastInst unittest: yes you can leave the IR in an invalid state and exit when you don't destroy the context (like the global one), no longer now. This is the first part of http://reviews.llvm.org/D19094 From: Mehdi Amini <mehdi.amini@apple.com> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@266379 91177308-0d34-0410-b5e6-96231b3b80d8
125 lines
4.1 KiB
C++
125 lines
4.1 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/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> 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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WriteBitcodeToFile(M, Out->os(), PreserveBitcodeUseListOrder, nullptr,
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EmitModuleHash);
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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;
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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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