+//===- 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/Bytecode/WriteBytecodePass.h"
#include "llvm/Assembly/PrintModulePass.h"
#include "llvm/Analysis/Verifier.h"
-#include "llvm/Transforms/ConstantMerge.h"
-#include "llvm/Transforms/CleanupGCCOutput.h"
-#include "llvm/Transforms/LevelChange.h"
-#include "llvm/Transforms/FunctionInlining.h"
-#include "llvm/Transforms/ChangeAllocations.h"
-#include "llvm/Transforms/IPO/SimpleStructMutation.h"
-#include "llvm/Transforms/IPO/Internalize.h"
-#include "llvm/Transforms/IPO/GlobalDCE.h"
-#include "llvm/Transforms/IPO/PoolAllocate.h"
-#include "llvm/Transforms/Scalar/ConstantProp.h"
-#include "llvm/Transforms/Scalar/DCE.h"
-#include "llvm/Transforms/Scalar/DecomposeMultiDimRefs.h"
-#include "llvm/Transforms/Scalar/GCSE.h"
-#include "llvm/Transforms/Scalar/IndVarSimplify.h"
-#include "llvm/Transforms/Scalar/InstructionCombining.h"
-#include "llvm/Transforms/Scalar/PromoteMemoryToRegister.h"
-#include "llvm/Transforms/Scalar/SymbolStripping.h"
-#include "llvm/Transforms/Utils/UnifyFunctionExitNodes.h"
-#include "llvm/Transforms/Instrumentation/TraceValues.h"
-#include "llvm/Transforms/Instrumentation/ProfilePaths.h"
-#include "Support/CommandLine.h"
-#include "Support/Signals.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>
-// Opts enum - All of the transformations we can do...
-enum Opts {
- // Basic optimizations
- dce, die, constprop, gcse, inlining, constmerge, strip, mstrip, mergereturn,
+using namespace llvm;
- // Miscellaneous Transformations
- raiseallocs, funcresolve, cleangcc, lowerrefs,
+// 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:"));
- // Printing and verifying...
- print, printm, verify,
- // More powerful optimizations
- indvars, instcombine, sccp, adce, raise, mem2reg,
+// Other command line options...
+//
+static cl::opt<std::string>
+InputFilename(cl::Positional, cl::desc("<input bytecode>"), cl::init("-"));
- // Instrumentation
- trace, tracem, paths,
+static cl::opt<std::string>
+OutputFilename("o", cl::desc("Override output filename"),
+ cl::value_desc("filename"), cl::init("-"));
- // Interprocedural optimizations...
- internalize, globaldce, swapstructs, sortstructs, poolalloc,
-};
+static cl::opt<bool>
+Force("f", cl::desc("Overwrite output files"));
-static Pass *createPrintFunctionPass() {
- return new PrintFunctionPass("Current Function: \n", &cerr);
-}
+static cl::opt<bool>
+PrintEachXForm("p", cl::desc("Print module after each transformation"));
-static Pass *createPrintModulePass() {
- return new PrintModulePass(&cerr);
-}
+static cl::opt<bool>
+NoOutput("disable-output",
+ cl::desc("Do not write result bytecode file"), cl::Hidden);
-// OptTable - Correlate enum Opts to Pass constructors...
-//
-struct {
- enum Opts OptID;
- Pass * (*PassCtor)();
-} OptTable[] = {
- { dce , createDeadCodeEliminationPass },
- { die , createDeadInstEliminationPass },
- { constprop , createConstantPropogationPass },
- { gcse , createGCSEPass },
- { inlining , createFunctionInliningPass },
- { constmerge , createConstantMergePass },
- { strip , createSymbolStrippingPass },
- { mstrip , createFullSymbolStrippingPass },
- { mergereturn, createUnifyFunctionExitNodesPass },
-
- { indvars , createIndVarSimplifyPass },
- { instcombine, createInstructionCombiningPass },
- { sccp , createSCCPPass },
- { adce , createAgressiveDCEPass },
- { raise , createRaisePointerReferencesPass },
- { mem2reg , createPromoteMemoryToRegister },
- { lowerrefs, createDecomposeMultiDimRefsPass },
-
- { trace , createTraceValuesPassForBasicBlocks },
- { tracem , createTraceValuesPassForFunction },
- { paths , createProfilePathsPass },
-
- { print , createPrintFunctionPass },
- { printm , createPrintModulePass },
- { verify , createVerifierPass },
-
- { raiseallocs, createRaiseAllocationsPass },
- { cleangcc , createCleanupGCCOutputPass },
- { funcresolve, createFunctionResolvingPass },
-
- { internalize, createInternalizePass },
- { globaldce , createGlobalDCEPass },
- { swapstructs, createSwapElementsPass },
- { sortstructs, createSortElementsPass },
- { poolalloc , createPoolAllocatePass },
-};
-
-
-// Command line option handling code...
-//
-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 PrintEachXForm("p", "Print module after each transformation");
-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(die , "Dead Instruction Elimination"),
- clEnumVal(constprop , "Simple constant propogation"),
- clEnumVal(gcse , "Global Common Subexpression Elimination"),
- clEnumValN(inlining , "inline", "Function integration"),
- clEnumVal(constmerge , "Merge identical global constants"),
- clEnumVal(strip , "Strip symbols"),
- clEnumVal(mstrip , "Strip module symbols"),
- clEnumVal(mergereturn, "Unify function exit nodes"),
-
- clEnumVal(indvars , "Simplify Induction Variables"),
- clEnumVal(instcombine, "Combine redundant instructions"),
- clEnumVal(sccp , "Sparse Conditional Constant Propogation"),
- clEnumVal(adce , "Agressive DCE"),
- clEnumVal(mem2reg , "Promote alloca locations to registers"),
-
- clEnumVal(internalize, "Mark all fn's internal except for main"),
- clEnumVal(globaldce , "Remove unreachable globals"),
- clEnumVal(swapstructs, "Swap structure types around"),
- clEnumVal(sortstructs, "Sort structure elements"),
- clEnumVal(poolalloc , "Pool allocate disjoint datastructures"),
-
- clEnumVal(raiseallocs, "Raise allocations from calls to instructions"),
- clEnumVal(cleangcc , "Cleanup GCC Output"),
- clEnumVal(funcresolve, "Resolve calls to foo(...) to foo(<concrete types>)"),
- clEnumVal(raise , "Raise to Higher Level"),
- clEnumVal(trace , "Insert BB and Function trace code"),
- clEnumVal(tracem , "Insert Function trace code only"),
- clEnumVal(paths , "Insert path profiling instrumentation"),
- clEnumVal(print , "Print working function to stderr"),
- clEnumVal(printm , "Print working module to stderr"),
- clEnumVal(verify , "Verify module is well formed"),
- clEnumVal(lowerrefs , "Decompose multi-dimensional structure/array refs to use one index per instruction"),
-0);
+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");
+ 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));
+ 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;
}
// Figure out what stream we are supposed to write to...
std::ostream *Out = &std::cout; // Default to printing to stdout...
- if (OutputFilename != "") {
+ if (OutputFilename != "-") {
if (!Force && std::ifstream(OutputFilename.c_str())) {
// If force is not specified, make sure not to overwrite a file!
- cerr << "Error opening '" << OutputFilename << "': File exists!\n"
- << "Use -f command line argument to force output\n";
+ 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());
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 unlink'd from the disk if we get a
+ // Make sure that the Output file gets unlinked from the disk if we get a
// SIGINT
RemoveFileOnSignal(OutputFilename);
}
+ // 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) {
- enum Opts Opt = OptimizationList[i];
- for (unsigned j = 0; j < sizeof(OptTable)/sizeof(OptTable[0]); ++j)
- if (Opt == OptTable[j].OptID) {
- Passes.add(OptTable[j].PassCtor());
- break;
- }
+ 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
- Passes.add(createVerifierPass());
+ if (!NoVerify)
+ Passes.add(createVerifierPass());
// Write bytecode out to disk or cout as the last step...
- Passes.add(new WriteBytecodePass(Out, Out != &std::cout));
+ 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)
- cerr << "Program modified.\n";
+ if (Passes.run(*M.get()) && !Quiet)
+ std::cerr << "Program modified.\n";
return 0;
}
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