mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-30 23:42:52 +01:00
79 lines
2.5 KiB
C++
79 lines
2.5 KiB
C++
//===------------------------------------------------------------------------===
|
|
// LLVM 'GCCAS' UTILITY
|
|
//
|
|
// This utility is designed to be used by the GCC frontend for creating
|
|
// bytecode files from it's intermediate llvm assembly. The requirements for
|
|
// this utility are thus slightly different than that of the standard as util.
|
|
//
|
|
//===------------------------------------------------------------------------===
|
|
|
|
#include "llvm/Module.h"
|
|
#include "llvm/Assembly/Parser.h"
|
|
#include "llvm/Transforms/CleanupGCCOutput.h"
|
|
#include "llvm/Transforms/LevelChange.h"
|
|
#include "llvm/Optimizations/ConstantProp.h"
|
|
#include "llvm/Optimizations/DCE.h"
|
|
#include "llvm/Transforms/ConstantMerge.h"
|
|
#include "llvm/Bytecode/Writer.h"
|
|
#include "llvm/Support/CommandLine.h"
|
|
#include <memory>
|
|
#include <fstream>
|
|
#include <string>
|
|
|
|
cl::String InputFilename ("", "Parse <arg> file, compile to bytecode",
|
|
cl::Required, "");
|
|
cl::String OutputFilename("o", "Override output filename", cl::NoFlags, "");
|
|
|
|
int main(int argc, char **argv) {
|
|
cl::ParseCommandLineOptions(argc, argv, " llvm .s -> .o assembler for GCC\n");
|
|
|
|
ostream *Out = 0;
|
|
std::auto_ptr<Module> M;
|
|
try {
|
|
// Parse the file now...
|
|
M.reset(ParseAssemblyFile(InputFilename));
|
|
} catch (const ParseException &E) {
|
|
cerr << E.getMessage() << endl;
|
|
return 1;
|
|
}
|
|
|
|
if (M.get() == 0) {
|
|
cerr << "assembly didn't read correctly.\n";
|
|
return 1;
|
|
}
|
|
|
|
if (OutputFilename == "") { // Didn't specify an output filename?
|
|
string IFN = InputFilename;
|
|
int Len = IFN.length();
|
|
if (IFN[Len-2] == '.' && IFN[Len-1] == 's') { // Source ends in .s?
|
|
OutputFilename = string(IFN.begin(), IFN.end()-2);
|
|
} else {
|
|
OutputFilename = IFN; // Append a .o to it
|
|
}
|
|
OutputFilename += ".o";
|
|
}
|
|
|
|
Out = new ofstream(OutputFilename.c_str(), ios::out);
|
|
if (!Out->good()) {
|
|
cerr << "Error opening " << OutputFilename << "!\n";
|
|
return 1;
|
|
}
|
|
|
|
// In addition to just parsing the input from GCC, we also want to spiff it up
|
|
// a little bit. Do this now.
|
|
//
|
|
vector<Pass*> Passes;
|
|
Passes.push_back(new CleanupGCCOutput()); // Fix gccisms
|
|
Passes.push_back(new RaisePointerReferences()); // Fix general low level code
|
|
Passes.push_back(new ConstantMerge()); // Merge dup global constants
|
|
|
|
// Run our queue of passes all at once now, efficiently. This form of
|
|
// runAllPasses frees the Pass objects after runAllPasses completes.
|
|
//
|
|
Pass::runAllPassesAndFree(M.get(), Passes);
|
|
|
|
WriteBytecodeToFile(M.get(), *Out);
|
|
return 0;
|
|
}
|
|
|