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f33d6df899
This puts all the global PassManager debugging flags, like -print-after-all and -time-passes, behind a managed static. This eliminates their static initializers and, more importantly, exit-time destructors. The only behavioral change I anticipate is that tools need to initialize the PassManager before parsing the command line in order to export these options, which makes sense. Tools that already initialize the standard passes (opt/llc) don't need to do anything new. llvm-svn: 190974
124 lines
3.7 KiB
C++
124 lines
3.7 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/IR/LLVMContext.h"
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#include "llvm/Analysis/Verifier.h"
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#include "llvm/Assembly/Parser.h"
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#include "llvm/Bitcode/ReaderWriter.h"
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#include "llvm/IR/Module.h"
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#include "llvm/PassManager.h"
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#include "llvm/Support/CommandLine.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>
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InputFilename(cl::Positional, cl::desc("<input .llvm file>"), cl::init("-"));
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static cl::opt<std::string>
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OutputFilename("o", cl::desc("Override output filename"),
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cl::value_desc("filename"));
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static cl::opt<bool>
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Force("f", cl::desc("Enable binary output on terminals"));
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static cl::opt<bool>
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DisableOutput("disable-output", cl::desc("Disable output"), cl::init(false));
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static cl::opt<bool>
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DumpAsm("d", cl::desc("Print assembly as parsed"), 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 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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std::string IFN = InputFilename;
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int Len = IFN.length();
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if (IFN[Len-3] == '.' && IFN[Len-2] == 'l' && IFN[Len-1] == 'l') {
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// Source ends in .ll
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OutputFilename = std::string(IFN.begin(), IFN.end()-3);
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} else {
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OutputFilename = IFN; // Append a .bc to it
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}
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OutputFilename += ".bc";
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}
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}
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std::string ErrorInfo;
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OwningPtr<tool_output_file> Out(new tool_output_file(
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OutputFilename.c_str(), ErrorInfo, sys::fs::F_Binary));
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if (!ErrorInfo.empty()) {
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errs() << ErrorInfo << '\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());
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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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// Initialize PassManager for -time-passes support.
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initializePassManager();
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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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OwningPtr<Module> M(ParseAssemblyFile(InputFilename, Err, Context));
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if (M.get() == 0) {
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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 Err;
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if (verifyModule(*M.get(), ReturnStatusAction, &Err)) {
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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() << Err;
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return 1;
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}
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}
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if (DumpAsm) 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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