2001-10-31 05:28:11 +01:00
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//===------------------------------------------------------------------------===
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// LLVM 'GCCAS' UTILITY
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//
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// This utility is designed to be used by the GCC frontend for creating
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// bytecode files from it's intermediate llvm assembly. The requirements for
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// this utility are thus slightly different than that of the standard as util.
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//
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//===------------------------------------------------------------------------===
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#include "llvm/Module.h"
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#include "llvm/Assembly/Parser.h"
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#include "llvm/Transforms/CleanupGCCOutput.h"
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2001-11-01 03:41:09 +01:00
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#include "llvm/Transforms/LevelChange.h"
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2001-10-31 05:28:11 +01:00
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#include "llvm/Optimizations/DCE.h"
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2001-10-31 07:36:48 +01:00
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#include "llvm/Transforms/ConstantMerge.h"
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2001-12-05 07:34:58 +01:00
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#include "llvm/Transforms/Scalar/IndVarSimplify.h"
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2001-12-14 17:48:30 +01:00
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#include "llvm/Transforms/Scalar/InstructionCombining.h"
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2001-10-31 05:28:11 +01:00
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#include "llvm/Bytecode/Writer.h"
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2001-11-27 01:03:19 +01:00
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#include "Support/CommandLine.h"
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2001-10-31 05:28:11 +01:00
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#include <memory>
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#include <fstream>
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#include <string>
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cl::String InputFilename ("", "Parse <arg> file, compile to bytecode",
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cl::Required, "");
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cl::String OutputFilename("o", "Override output filename", cl::NoFlags, "");
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int main(int argc, char **argv) {
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2001-10-31 05:33:33 +01:00
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cl::ParseCommandLineOptions(argc, argv, " llvm .s -> .o assembler for GCC\n");
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2001-10-31 05:28:11 +01:00
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ostream *Out = 0;
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std::auto_ptr<Module> M;
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try {
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// Parse the file now...
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M.reset(ParseAssemblyFile(InputFilename));
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} catch (const ParseException &E) {
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cerr << E.getMessage() << endl;
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return 1;
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}
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if (M.get() == 0) {
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cerr << "assembly didn't read correctly.\n";
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return 1;
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}
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if (OutputFilename == "") { // Didn't specify an output filename?
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string IFN = InputFilename;
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int Len = IFN.length();
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if (IFN[Len-2] == '.' && IFN[Len-1] == 's') { // Source ends in .s?
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OutputFilename = string(IFN.begin(), IFN.end()-2);
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} else {
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OutputFilename = IFN; // Append a .o to it
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}
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OutputFilename += ".o";
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}
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Out = new ofstream(OutputFilename.c_str(), ios::out);
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if (!Out->good()) {
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cerr << "Error opening " << OutputFilename << "!\n";
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return 1;
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}
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// In addition to just parsing the input from GCC, we also want to spiff it up
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// a little bit. Do this now.
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//
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vector<Pass*> Passes;
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2001-12-07 05:25:36 +01:00
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Passes.push_back(new opt::DeadCodeElimination()); // Remove Dead code/vars
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Passes.push_back(new CleanupGCCOutput()); // Fix gccisms
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2001-12-05 07:34:58 +01:00
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Passes.push_back(new InductionVariableSimplify()); // Simplify indvars
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2001-12-14 17:48:30 +01:00
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Passes.push_back(new RaisePointerReferences()); // Eliminate casts
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Passes.push_back(new ConstantMerge()); // Merge dup global consts
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Passes.push_back(new InstructionCombining()); // Combine silly seq's
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Passes.push_back(new opt::DeadCodeElimination()); // Remove Dead code/vars
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2001-10-31 05:28:11 +01:00
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// Run our queue of passes all at once now, efficiently. This form of
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// runAllPasses frees the Pass objects after runAllPasses completes.
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//
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Pass::runAllPassesAndFree(M.get(), Passes);
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WriteBytecodeToFile(M.get(), *Out);
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return 0;
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}
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