-//===------------------------------------------------------------------------===
-// LLVM 'AS' UTILITY
+//===--- llvm-as.cpp - The low-level LLVM assembler -----------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
//
// This utility may be invoked in the following manner:
-// as --help - Output information about command line switches
-// as [options] - Read LLVM assembly from stdin, write bytecode to stdout
-// as [options] x.ll - Read LLVM assembly from the x.ll file, write bytecode
-// to the x.bc file.
+// llvm-as --help - Output information about command line switches
+// llvm-as [options] - Read LLVM asm from stdin, write bitcode to stdout
+// llvm-as [options] x.ll - Read LLVM asm from the x.ll file, write bitcode
+// to the x.bc file.
//
-//===------------------------------------------------------------------------===
+//===----------------------------------------------------------------------===//
-#include <iostream.h>
-#include <fstream.h>
-#include <string>
#include "llvm/Module.h"
#include "llvm/Assembly/Parser.h"
-#include "llvm/Assembly/Writer.h"
-#include "llvm/Bytecode/Writer.h"
-#include "llvm/Tools/CommandLine.h"
+#include "llvm/Analysis/Verifier.h"
+#include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/Streams.h"
+#include "llvm/Support/SystemUtils.h"
+#include "llvm/System/Signals.h"
+#include <fstream>
+#include <iostream>
+#include <memory>
+using namespace llvm;
+
+static cl::opt<std::string>
+InputFilename(cl::Positional, cl::desc("<input .llvm file>"), cl::init("-"));
+
+static cl::opt<std::string>
+OutputFilename("o", cl::desc("Override output filename"),
+ cl::value_desc("filename"));
-cl::String InputFilename ("", "Parse <arg> file, compile to bytecode", 0, "-");
-cl::String OutputFilename("o", "Override output filename", 0, "");
-cl::Flag Force ("f", "Overwrite output files", 0, false);
-cl::Flag DumpAsm ("d", "Print assembly as parsed", cl::Hidden, false);
+static cl::opt<bool>
+Force("f", cl::desc("Overwrite output files"));
+
+static cl::opt<bool>
+DumpAsm("d", cl::desc("Print assembly as parsed"), cl::Hidden);
+
+static cl::opt<bool>
+DisableVerify("disable-verify", cl::Hidden,
+ cl::desc("Do not run verifier on input LLVM (dangerous!)"));
int main(int argc, char **argv) {
+ llvm_shutdown_obj X; // Call llvm_shutdown() on exit.
cl::ParseCommandLineOptions(argc, argv, " llvm .ll -> .bc assembler\n");
+ sys::PrintStackTraceOnErrorSignal();
- ostream *Out = 0;
+ int exitCode = 0;
+ std::ostream *Out = 0;
try {
// Parse the file now...
- Module *C = ParseAssemblyFile(InputFilename.getValue());
- if (C == 0) {
- cerr << "assembly didn't read correctly.\n";
+ ParseError Err;
+ std::auto_ptr<Module> M(ParseAssemblyFile(InputFilename,&Err));
+ if (M.get() == 0) {
+ cerr << argv[0] << ": " << Err.getMessage() << "\n";
return 1;
}
-
- if (DumpAsm.getValue())
- cerr << "Here's the assembly:\n" << C;
- if (OutputFilename.getValue() != "") { // Specified an output filename?
- Out = new ofstream(OutputFilename.getValue().c_str(),
- (Force.getValue() ? 0 : ios::noreplace)|ios::out);
+ if (!DisableVerify) {
+ std::string Err;
+ if (verifyModule(*M.get(), ReturnStatusAction, &Err)) {
+ cerr << argv[0]
+ << ": assembly parsed, but does not verify as correct!\n";
+ cerr << Err;
+ return 1;
+ }
+ }
+
+ if (DumpAsm) cerr << "Here's the assembly:\n" << *M.get();
+
+ if (OutputFilename != "") { // Specified an output filename?
+ if (OutputFilename != "-") { // Not stdout?
+ if (!Force && std::ifstream(OutputFilename.c_str())) {
+ // If force is not specified, make sure not to overwrite a file!
+ cerr << argv[0] << ": error opening '" << OutputFilename
+ << "': file exists!\n"
+ << "Use -f command line argument to force output\n";
+ return 1;
+ }
+ Out = new std::ofstream(OutputFilename.c_str(), std::ios::out |
+ std::ios::trunc | std::ios::binary);
+ } else { // Specified stdout
+ // FIXME: cout is not binary!
+ Out = &std::cout;
+ }
} else {
- if (InputFilename.getValue() == "-") {
- OutputFilename.setValue("-");
- Out = &cout;
+ if (InputFilename == "-") {
+ OutputFilename = "-";
+ Out = &std::cout;
} else {
- string IFN = InputFilename.getValue();
- int Len = IFN.length();
- if (IFN[Len-3] == '.' && IFN[Len-2] == 'l' && IFN[Len-1] == 'l') {
- // Source ends in .ll
- OutputFilename.setValue(string(IFN.begin(), IFN.end()-3));
+ std::string IFN = InputFilename;
+ int Len = IFN.length();
+ if (IFN[Len-3] == '.' && IFN[Len-2] == 'l' && IFN[Len-1] == 'l') {
+ // Source ends in .ll
+ OutputFilename = std::string(IFN.begin(), IFN.end()-3);
} else {
- OutputFilename.setValue(IFN); // Append a .bc to it
- }
- OutputFilename.setValue(OutputFilename.getValue() + ".bc");
- Out = new ofstream(OutputFilename.getValue().c_str(),
- (Force.getValue() ? 0 : ios::noreplace)|ios::out);
- }
-
- if (!Out->good()) {
- cerr << "Error opening " << OutputFilename.getValue() << "!\n";
- delete C;
- return 1;
+ OutputFilename = IFN; // Append a .bc to it
+ }
+ OutputFilename += ".bc";
+
+ if (!Force && std::ifstream(OutputFilename.c_str())) {
+ // If force is not specified, make sure not to overwrite a file!
+ cerr << argv[0] << ": error opening '" << OutputFilename
+ << "': file exists!\n"
+ << "Use -f command line argument to force output\n";
+ return 1;
+ }
+
+ Out = new std::ofstream(OutputFilename.c_str(), std::ios::out |
+ std::ios::trunc | std::ios::binary);
+ // Make sure that the Out file gets unlinked from the disk if we get a
+ // SIGINT
+ sys::RemoveFileOnSignal(sys::Path(OutputFilename));
}
}
-
- WriteBytecodeToFile(C, *Out);
- delete C;
- } catch (const ParseException &E) {
- cerr << E.getMessage() << endl;
- return 1;
+ if (!Out->good()) {
+ cerr << argv[0] << ": error opening " << OutputFilename << "!\n";
+ return 1;
+ }
+
+ if (Force || !CheckBitcodeOutputToConsole(Out,true))
+ WriteBitcodeToFile(M.get(), *Out);
+ } catch (const std::string& msg) {
+ cerr << argv[0] << ": " << msg << "\n";
+ exitCode = 1;
+ } catch (...) {
+ cerr << argv[0] << ": Unexpected unknown exception occurred.\n";
+ exitCode = 1;
}
- if (Out != &cout) delete Out;
- return 0;
+ if (Out != &std::cout) delete Out;
+ return exitCode;
}
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