1 //===------------------------------------------------------------------------===
4 // This utility may be invoked in the following manner:
5 // opt --help - Output information about command line switches
6 // opt [options] -dce - Run a dead code elimination pass on input
8 // opt [options] -constprop - Run a constant propogation pass on input
10 // opt [options] -inline - Run a method inlining pass on input bytecodes
11 // opt [options] -strip - Strip symbol tables out of methods
12 // opt [options] -mstrip - Strip module & method symbol tables
14 // Optimizations may be specified an arbitrary number of times on the command
15 // line, they are run in the order specified.
17 // TODO: Add a -all option to keep applying all optimizations until the program
20 //===------------------------------------------------------------------------===
24 #include "llvm/Module.h"
25 #include "llvm/Bytecode/Reader.h"
26 #include "llvm/Bytecode/Writer.h"
27 #include "llvm/Tools/CommandLine.h"
28 #include "llvm/Opt/AllOpts.h"
31 const string ArgName, Name;
32 bool (*OptPtr)(Module *C);
34 { "-dce" , "Dead Code Elimination", DoDeadCodeElimination },
35 { "-constprop" , "Constant Propogation", DoConstantPropogation },
36 { "-inline" , "Method Inlining", DoMethodInlining },
37 { "-strip" , "Strip Symbols", DoSymbolStripping },
38 { "-mstrip" , "Strip Module Symbols", DoFullSymbolStripping },
39 { "-indvars" , "Simplify Induction Vars",DoInductionVariableCannonicalize },
40 { "-sccp" , "Sparse Conditional Constant Prop", DoSCCP<Module> },
41 { "-cpm" , "Constant Pool Merging", DoConstantPoolMerging },
44 int main(int argc, char **argv) {
45 ToolCommandLine Opts(argc, argv, false);
48 for (int i = 1; i < argc; i++) {
49 if (string(argv[i]) == string("--help")) {
50 cerr << argv[0] << " usage:\n"
51 << " " << argv[0] << " --help - Print this usage information\n";
52 for (unsigned j = 0; j < sizeof(OptTable)/sizeof(OptTable[0]); ++j) {
53 cerr << "\t" << OptTable[j].ArgName << "\t - Enable "
54 << OptTable[j].Name << endl;
57 } else if (string(argv[i]) == string("-q")) {
58 Quiet = true; argv[i] = 0;
62 ostream *Out = &cout; // Default to printing to stdout...
64 Module *C = ParseBytecodeFile(Opts.getInputFilename());
66 cerr << "bytecode didn't read correctly.\n";
71 for (int i = 1; i < argc; i++) {
72 if (argv[i] == 0) continue;
74 for (j = 0; j < sizeof(OptTable)/sizeof(OptTable[0]); j++) {
75 if (string(argv[i]) == OptTable[j].ArgName) {
76 if (OptTable[j].OptPtr(C) && !Quiet)
77 cerr << OptTable[j].Name << " pass made modifications!\n";
82 if (j == sizeof(OptTable)/sizeof(OptTable[0]))
83 cerr << "'" << argv[i] << "' argument unrecognized: ignored\n";
86 if (Opts.getOutputFilename() != "-") {
87 Out = new ofstream(Opts.getOutputFilename().c_str(),
88 (Opts.getForce() ? 0 : ios::noreplace)|ios::out);
90 cerr << "Error opening " << Opts.getOutputFilename()
97 // Okay, we're done now... write out result...
98 WriteBytecodeToFile(C, *Out);
101 if (Out != &cout) delete Out;