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98 lines
2.9 KiB
C++
98 lines
2.9 KiB
C++
//===-- llc.cpp - Implement the LLVM Compiler ----------------------------===//
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//
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// This is the llc compiler driver.
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//
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//===---------------------------------------------------------------------===//
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#include "llvm/Bytecode/Reader.h"
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#include "llvm/Optimizations/Normalize.h"
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#include "llvm/Target/Sparc.h"
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#include "llvm/Target/TargetMachine.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Module.h"
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#include "llvm/Method.h"
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#include <memory>
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#include <fstream>
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cl::String InputFilename ("", "Input filename", cl::NoFlags, "-");
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cl::String OutputFilename("o", "Output filename", cl::NoFlags, "");
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cl::Flag Force ("f", "Overwrite output files", cl::NoFlags, false);
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//-------------------------- Internal Functions -----------------------------//
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static void NormalizeMethod(Method *M) {
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NormalizePhiConstantArgs(M);
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}
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//===---------------------------------------------------------------------===//
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// Function main()
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//
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// Entry point for the llc compiler.
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//===---------------------------------------------------------------------===//
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int main(int argc, char **argv) {
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// Parse command line options...
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cl::ParseCommandLineOptions(argc, argv, " llvm system compiler\n");
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// Allocate a target... in the future this will be controllable on the
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// command line.
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auto_ptr<TargetMachine> Target(allocateSparcTargetMachine());
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// Load the module to be compiled...
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auto_ptr<Module> M(ParseBytecodeFile(InputFilename));
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if (M.get() == 0) {
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cerr << "bytecode didn't read correctly.\n";
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return 1;
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}
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// Loop over all of the methods in the module, compiling them.
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for (Module::const_iterator MI = M->begin(), ME = M->end(); MI != ME; ++MI) {
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Method *Meth = *MI;
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NormalizeMethod(Meth);
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if (Target.get()->compileMethod(Meth)) {
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cerr << "Error compiling " << InputFilename << "!\n";
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return 1;
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}
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}
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// Figure out where we are going to send the output...
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ostream *Out = 0;
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if (OutputFilename != "") { // Specified an output filename?
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Out = new ofstream(OutputFilename.c_str(),
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(Force ? 0 : ios::noreplace)|ios::out);
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} else {
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if (InputFilename == "-") {
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OutputFilename = "-";
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Out = &cout;
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} else {
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string IFN = InputFilename;
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int Len = IFN.length();
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if (IFN[Len-3] == '.' && IFN[Len-2] == 'b' && IFN[Len-1] == 'c') {
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OutputFilename = string(IFN.begin(), IFN.end()-3); // s/.bc/.s/
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} else {
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OutputFilename = IFN; // Append a .s to it
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}
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OutputFilename += ".s";
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Out = new ofstream(OutputFilename.c_str(),
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(Force ? 0 : ios::noreplace)|ios::out);
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if (!Out->good()) {
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cerr << "Error opening " << OutputFilename << "!\n";
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delete Out;
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return 1;
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}
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}
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}
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// Emit the output...
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Target->emitAssembly(M.get(), *Out);
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if (Out != &cout) delete Out;
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return 0;
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}
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