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https://github.com/c64scene-ar/llvm-6502.git
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56e1394c88
directory. These passes are already defined in the IR library, and it doesn't make any sense to have the headers in Analysis. Long term, I think there is going to be a much better way to divide these matters. The dominators code should be fully separated into the abstract graph algorithm and have that put in Support where it becomes obvious that evn Clang's CFGBlock's can use it. Then the verifier can manually construct dominance information from the Support-driven interface while the Analysis library can provide a pass which both caches, reconstructs, and supports a nice update API. But those are very long term, and so I don't want to leave the really confusing structure until that day arrives. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199082 91177308-0d34-0410-b5e6-96231b3b80d8
119 lines
3.6 KiB
C++
119 lines
3.6 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/AsmParser/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/IR/Verifier.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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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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