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llvm-mirror/tools/gccas/gccas.cpp
Chris Lattner 83056c99ec Pull RaiseAllocations stuff out of the CleanGCC pass into it's own pass in
the ChangeAllocations.h header file.

llvm-svn: 1522
2002-01-22 00:13:51 +00:00

86 lines
2.9 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/Transforms/ConstantMerge.h"
#include "llvm/Transforms/LowerAllocations.h"
#include "llvm/Transforms/Scalar/DCE.h"
#include "llvm/Transforms/Scalar/IndVarSimplify.h"
#include "llvm/Transforms/Scalar/InstructionCombining.h"
#include "llvm/Bytecode/Writer.h"
#include "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?
std::string IFN = InputFilename;
int Len = IFN.length();
if (IFN[Len-2] == '.' && IFN[Len-1] == 's') { // Source ends in .s?
OutputFilename = std::string(IFN.begin(), IFN.end()-2);
} else {
OutputFilename = IFN; // Append a .o to it
}
OutputFilename += ".o";
}
Out = new std::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.
//
PassManager Passes;
Passes.add(new DeadCodeElimination()); // Remove Dead code/vars
Passes.add(new RaiseAllocations()); // call %malloc -> malloc inst
Passes.add(new CleanupGCCOutput()); // Fix gccisms
Passes.add(new InductionVariableSimplify()); // Simplify indvars
Passes.add(new RaisePointerReferences()); // Eliminate casts
Passes.add(new ConstantMerge()); // Merge dup global consts
Passes.add(new InstructionCombining()); // Combine silly seq's
Passes.add(new DeadCodeElimination()); // Remove Dead code/vars
// Run our queue of passes all at once now, efficiently. This form of
// runAllPasses frees the Pass objects after runAllPasses completes.
//
Passes.run(M.get());
WriteBytecodeToFile(M.get(), *Out);
return 0;
}