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/Optimizations/AllOpts.h"
33 const string ArgName, Name;
34 bool (*OptPtr)(Module *C);
36 { "-dce" , "Dead Code Elimination", DoDeadCodeElimination },
37 { "-constprop" , "Constant Propogation", DoConstantPropogation },
38 { "-inline" , "Method Inlining", DoMethodInlining },
39 { "-strip" , "Strip Symbols", DoSymbolStripping },
40 { "-mstrip" , "Strip Module Symbols", DoFullSymbolStripping },
41 { "-indvars" , "Simplify Induction Vars",DoInductionVariableCannonicalize },
42 { "-sccp" , "Sparse Conditional Constant Prop", DoSCCP },
43 { "-cpm" , "Constant Pool Merging", DoConstantPoolMerging },
44 { "-adce" , "Agressive DCE", DoADCE },
47 int main(int argc, char **argv) {
48 ToolCommandLine Opts(argc, argv, false);
51 for (int i = 1; i < argc; i++) {
52 if (string(argv[i]) == string("--help")) {
53 cerr << argv[0] << " usage:\n"
54 << " " << argv[0] << " --help - Print this usage information\n";
55 for (unsigned j = 0; j < sizeof(OptTable)/sizeof(OptTable[0]); ++j) {
56 cerr << "\t" << OptTable[j].ArgName << "\t - Enable "
57 << OptTable[j].Name << endl;
60 } else if (string(argv[i]) == string("-q")) {
61 Quiet = true; argv[i] = 0;
65 ostream *Out = &cout; // Default to printing to stdout...
67 Module *C = ParseBytecodeFile(Opts.getInputFilename());
69 cerr << "bytecode didn't read correctly.\n";
74 for (int i = 1; i < argc; i++) {
75 if (argv[i] == 0) continue;
77 for (j = 0; j < sizeof(OptTable)/sizeof(OptTable[0]); j++) {
78 if (string(argv[i]) == OptTable[j].ArgName) {
79 if (OptTable[j].OptPtr(C) && !Quiet)
80 cerr << OptTable[j].Name << " pass made modifications!\n";
85 if (j == sizeof(OptTable)/sizeof(OptTable[0]))
86 cerr << "'" << argv[i] << "' argument unrecognized: ignored\n";
89 if (Opts.getOutputFilename() != "-") {
90 Out = new ofstream(Opts.getOutputFilename().c_str(),
91 (Opts.getForce() ? 0 : ios::noreplace)|ios::out);
93 cerr << "Error opening " << Opts.getOutputFilename()
100 // Okay, we're done now... write out result...
101 WriteBytecodeToFile(C, *Out);
104 if (Out != &cout) delete Out;