+//===- opt.cpp - The LLVM Modular Optimizer -------------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
//===----------------------------------------------------------------------===//
-// LLVM 'OPT' UTILITY
//
// Optimizations may be specified an arbitrary number of times on the command
// line, they are run in the order specified.
//===----------------------------------------------------------------------===//
#include "llvm/Module.h"
+#include "llvm/PassManager.h"
#include "llvm/Bytecode/Reader.h"
-#include "llvm/Bytecode/Writer.h"
-#include "llvm/Optimizations/AllOpts.h"
-#include "llvm/Transforms/Instrumentation/TraceValues.h"
+#include "llvm/Bytecode/WriteBytecodePass.h"
#include "llvm/Assembly/PrintModulePass.h"
-#include "llvm/Transforms/ConstantMerge.h"
-#include "llvm/Transforms/CleanupGCCOutput.h"
-#include "llvm/Transforms/LevelChange.h"
-#include "llvm/Transforms/SwapStructContents.h"
-#include "llvm/Transforms/IPO/GlobalDCE.h"
-#include "llvm/Transforms/Scalar/IndVarSimplify.h"
-#include "Support/CommandLine.h"
+#include "llvm/Analysis/Verifier.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetMachineImpls.h"
+#include "llvm/Support/PassNameParser.h"
+#include "llvm/System/Signals.h"
+#include "Support/SystemUtils.h"
#include <fstream>
#include <memory>
+#include <algorithm>
-enum Opts {
- // Basic optimizations
- dce, constprop, inlining, mergecons, strip, mstrip,
-
- // Miscellaneous Transformations
- trace, tracem, print, cleangcc,
-
- // More powerful optimizations
- indvars, sccp, adce, raise,
-
- // Interprocedural optimizations...
- globaldce, swapstructs,
-};
-
-struct {
- enum Opts OptID;
- Pass *ThePass;
-} OptTable[] = {
- { swapstructs, 0 },
- { dce , new opt::DeadCodeElimination() },
- { constprop, new opt::ConstantPropogation() },
- { inlining , new opt::MethodInlining() },
- { mergecons, new ConstantMerge() },
- { strip , new opt::SymbolStripping() },
- { mstrip , new opt::FullSymbolStripping() },
- { indvars , new InductionVariableSimplify() },
- { sccp , new opt::SCCPPass() },
- { adce , new opt::AgressiveDCE() },
- { raise , new RaisePointerReferences() },
- { trace , new InsertTraceCode(true, true) },
- { tracem , new InsertTraceCode(false, true) },
- { print , new PrintModulePass("Current Method: \n",&cerr) },
- { cleangcc , new CleanupGCCOutput() },
-};
-
-cl::String InputFilename ("", "Load <arg> file to optimize", cl::NoFlags, "-");
-cl::String OutputFilename("o", "Override output filename", cl::NoFlags, "");
-cl::Flag Force ("f", "Overwrite output files", cl::NoFlags, false);
-cl::Flag Quiet ("q", "Don't print modifying pass names", 0, false);
-cl::Alias QuietA ("quiet", "Alias for -q", cl::NoFlags, Quiet);
-cl::EnumList<enum Opts> OptimizationList(cl::NoFlags,
- clEnumVal(dce , "Dead Code Elimination"),
- clEnumVal(constprop, "Simple Constant Propogation"),
- clEnumValN(inlining , "inline", "Method Integration"),
- clEnumVal(mergecons, "Merge identical global constants"),
- clEnumVal(strip , "Strip Symbols"),
- clEnumVal(mstrip , "Strip Module Symbols"),
- clEnumVal(indvars , "Simplify Induction Variables"),
- clEnumVal(sccp , "Sparse Conditional Constant Propogation"),
- clEnumVal(adce , "Agressive DCE"),
-
- clEnumVal(globaldce, "Remove unreachable globals"),
- clEnumVal(swapstructs, "Swap structure types around"),
-
- clEnumVal(cleangcc , "Cleanup GCC Output"),
- clEnumVal(raise , "Raise to Higher Level"),
- clEnumVal(trace , "Insert BB & Method trace code"),
- clEnumVal(tracem , "Insert Method trace code only"),
- clEnumVal(print , "Print working method to stderr"),
-0);
-
-static void RunOptimization(Module *M, enum Opts Opt) {
- for (unsigned j = 0; j < sizeof(OptTable)/sizeof(OptTable[0]); ++j)
- if (Opt == OptTable[j].OptID) {
- if (OptTable[j].ThePass->run(M) && !Quiet)
- cerr << OptimizationList.getArgName(Opt)
- << " pass made modifications!\n";
- return;
- }
-
- // Special cases that haven't been fit into a consistent framework yet...
- switch (Opt) {
- case globaldce: {
- GlobalDCE GDCE; GDCE.run(M); return;
- }
- case swapstructs: {
- PrebuiltStructMutation SM(M, PrebuiltStructMutation::SortElements);
- SM.run(M); return;
- }
- default:
- cerr << "Optimization tables inconsistent!!\n";
- }
-}
+using namespace llvm;
+
+// The OptimizationList is automatically populated with registered Passes by the
+// PassNameParser.
+//
+static cl::list<const PassInfo*, bool,
+ FilteredPassNameParser<PassInfo::Optimization> >
+OptimizationList(cl::desc("Optimizations available:"));
+
+
+// Other command line options...
+//
+static cl::opt<std::string>
+InputFilename(cl::Positional, cl::desc("<input bytecode>"), cl::init("-"));
+
+static cl::opt<std::string>
+OutputFilename("o", cl::desc("Override output filename"),
+ cl::value_desc("filename"), cl::init("-"));
+
+static cl::opt<bool>
+Force("f", cl::desc("Overwrite output files"));
+
+static cl::opt<bool>
+PrintEachXForm("p", cl::desc("Print module after each transformation"));
+
+static cl::opt<bool>
+NoOutput("disable-output",
+ cl::desc("Do not write result bytecode file"), cl::Hidden);
+
+static cl::opt<bool>
+NoVerify("disable-verify", cl::desc("Do not verify result module"), cl::Hidden);
+
+static cl::opt<bool>
+Quiet("q", cl::desc("Don't print 'program modified' message"));
+
+static cl::alias
+QuietA("quiet", cl::desc("Alias for -q"), cl::aliasopt(Quiet));
+
+//===----------------------------------------------------------------------===//
+// main for opt
+//
int main(int argc, char **argv) {
cl::ParseCommandLineOptions(argc, argv,
" llvm .bc -> .bc modular optimizer\n");
- std::auto_ptr<Module> M(ParseBytecodeFile(InputFilename));
+ PrintStackTraceOnErrorSignal();
+
+ // Allocate a full target machine description only if necessary...
+ // FIXME: The choice of target should be controllable on the command line.
+ std::auto_ptr<TargetMachine> target;
+
+ TargetMachine* TM = NULL;
+ std::string ErrorMessage;
+
+ // Load the input module...
+ std::auto_ptr<Module> M(ParseBytecodeFile(InputFilename, &ErrorMessage));
if (M.get() == 0) {
- cerr << "bytecode didn't read correctly.\n";
+ std::cerr << argv[0] << ": ";
+ if (ErrorMessage.size())
+ std::cerr << ErrorMessage << "\n";
+ else
+ std::cerr << "bytecode didn't read correctly.\n";
return 1;
}
- // Run all of the optimizations specified on the command line
- for (unsigned i = 0; i < OptimizationList.size(); ++i)
- RunOptimization(M.get(), OptimizationList[i]);
+ // Figure out what stream we are supposed to write to...
+ std::ostream *Out = &std::cout; // Default to printing to stdout...
+ if (OutputFilename != "-") {
+ if (!Force && std::ifstream(OutputFilename.c_str())) {
+ // If force is not specified, make sure not to overwrite a file!
+ std::cerr << argv[0] << ": error opening '" << OutputFilename
+ << "': file exists!\n"
+ << "Use -f command line argument to force output\n";
+ return 1;
+ }
+ Out = new std::ofstream(OutputFilename.c_str());
- ostream *Out = &cout; // Default to printing to stdout...
- if (OutputFilename != "") {
- Out = new ofstream(OutputFilename.c_str(),
- (Force ? 0 : ios::noreplace)|ios::out);
if (!Out->good()) {
- cerr << "Error opening " << OutputFilename << "!\n";
+ std::cerr << argv[0] << ": error opening " << OutputFilename << "!\n";
return 1;
}
+
+ // Make sure that the Output file gets unlinked from the disk if we get a
+ // SIGINT
+ RemoveFileOnSignal(OutputFilename);
}
- // Okay, we're done now... write out result...
- WriteBytecodeToFile(M.get(), *Out);
+ // If the output is set to be emitted to standard out, and standard out is a
+ // console, print out a warning message and refuse to do it. We don't impress
+ // anyone by spewing tons of binary goo to a terminal.
+ if (Out == &std::cout && isStandardOutAConsole() && !Force && !NoOutput) {
+ std::cerr << "WARNING: It looks like you're attempting to print out a "
+ << "bytecode file. I'm\ngoing to pretend you didn't ask me to do"
+ << " this (for your own good). If you\nREALLY want to taste LLVM"
+ << " bytecode first hand, you can force output with the\n'-f'"
+ << " option.\n\n";
+ NoOutput = true;
+ }
+
+ // Create a PassManager to hold and optimize the collection of passes we are
+ // about to build...
+ //
+ PassManager Passes;
+
+ // Add an appropriate TargetData instance for this module...
+ Passes.add(new TargetData("opt", M.get()));
+
+ // Create a new optimization pass for each one specified on the command line
+ for (unsigned i = 0; i < OptimizationList.size(); ++i) {
+ const PassInfo *Opt = OptimizationList[i];
+
+ if (Opt->getNormalCtor())
+ Passes.add(Opt->getNormalCtor()());
+ else if (Opt->getTargetCtor()) {
+#if 0
+ if (target.get() == NULL)
+ target.reset(allocateSparcTargetMachine()); // FIXME: target option
+#endif
+ assert(target.get() && "Could not allocate target machine!");
+ Passes.add(Opt->getTargetCtor()(*target.get()));
+ } else
+ std::cerr << argv[0] << ": cannot create pass: " << Opt->getPassName()
+ << "\n";
+
+ if (PrintEachXForm)
+ Passes.add(new PrintModulePass(&std::cerr));
+ }
+
+ // Check that the module is well formed on completion of optimization
+ if (!NoVerify)
+ Passes.add(createVerifierPass());
+
+ // Write bytecode out to disk or cout as the last step...
+ if (!NoOutput)
+ Passes.add(new WriteBytecodePass(Out, Out != &std::cout));
+
+ // Now that we have all of the passes ready, run them.
+ if (Passes.run(*M.get()) && !Quiet)
+ std::cerr << "Program modified.\n";
- if (Out != &cout) delete Out;
return 0;
}
projects / oota-llvm.git / blobdiff