mirror of
https://github.com/c64scene-ar/llvm-6502.git
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fc514f40a6
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2531 91177308-0d34-0410-b5e6-96231b3b80d8
221 lines
8.2 KiB
C++
221 lines
8.2 KiB
C++
//===----------------------------------------------------------------------===//
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// LLVM 'OPT' UTILITY
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//
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// Optimizations may be specified an arbitrary number of times on the command
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// line, they are run in the order specified.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Module.h"
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#include "llvm/PassManager.h"
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#include "llvm/Bytecode/Reader.h"
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#include "llvm/Bytecode/WriteBytecodePass.h"
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#include "llvm/Assembly/PrintModulePass.h"
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#include "llvm/Analysis/Verifier.h"
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#include "llvm/Transforms/ConstantMerge.h"
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#include "llvm/Transforms/CleanupGCCOutput.h"
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#include "llvm/Transforms/LevelChange.h"
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#include "llvm/Transforms/FunctionInlining.h"
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#include "llvm/Transforms/ChangeAllocations.h"
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#include "llvm/Transforms/IPO/SimpleStructMutation.h"
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#include "llvm/Transforms/IPO/Internalize.h"
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#include "llvm/Transforms/IPO/GlobalDCE.h"
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#include "llvm/Transforms/IPO/PoolAllocate.h"
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#include "llvm/Transforms/Scalar/ConstantProp.h"
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#include "llvm/Transforms/Scalar/DCE.h"
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#include "llvm/Transforms/Scalar/DecomposeMultiDimRefs.h"
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#include "llvm/Transforms/Scalar/GCSE.h"
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#include "llvm/Transforms/Scalar/IndVarSimplify.h"
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#include "llvm/Transforms/Scalar/InstructionCombining.h"
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#include "llvm/Transforms/Scalar/PromoteMemoryToRegister.h"
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#include "llvm/Transforms/Scalar/SymbolStripping.h"
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#include "llvm/Transforms/Utils/UnifyFunctionExitNodes.h"
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#include "llvm/Transforms/Instrumentation/TraceValues.h"
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#include "llvm/Transforms/Instrumentation/ProfilePaths.h"
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#include "Support/CommandLine.h"
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#include "Support/Signals.h"
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#include <fstream>
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#include <memory>
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// Opts enum - All of the transformations we can do...
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enum Opts {
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// Basic optimizations
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dce, die, constprop, gcse, inlining, constmerge, strip, mstrip, mergereturn,
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// Miscellaneous Transformations
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raiseallocs, funcresolve, cleangcc, lowerrefs,
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// Printing and verifying...
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print, printm, verify,
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// More powerful optimizations
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indvars, instcombine, sccp, adce, raise, mem2reg,
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// Instrumentation
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trace, tracem, paths,
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// Interprocedural optimizations...
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internalize, globaldce, swapstructs, sortstructs, poolalloc,
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};
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static Pass *createPrintFunctionPass() {
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return new PrintFunctionPass("Current Function: \n", &cerr);
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}
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static Pass *createPrintModulePass() {
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return new PrintModulePass(&cerr);
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}
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// OptTable - Correlate enum Opts to Pass constructors...
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//
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struct {
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enum Opts OptID;
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Pass * (*PassCtor)();
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} OptTable[] = {
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{ dce , createDeadCodeEliminationPass },
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{ die , createDeadInstEliminationPass },
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{ constprop , createConstantPropogationPass },
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{ gcse , createGCSEPass },
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{ inlining , createFunctionInliningPass },
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{ constmerge , createConstantMergePass },
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{ strip , createSymbolStrippingPass },
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{ mstrip , createFullSymbolStrippingPass },
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{ mergereturn, createUnifyFunctionExitNodesPass },
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{ indvars , createIndVarSimplifyPass },
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{ instcombine, createInstructionCombiningPass },
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{ sccp , createSCCPPass },
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{ adce , createAgressiveDCEPass },
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{ raise , createRaisePointerReferencesPass },
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{ mem2reg , createPromoteMemoryToRegister },
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{ lowerrefs, createDecomposeMultiDimRefsPass },
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{ trace , createTraceValuesPassForBasicBlocks },
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{ tracem , createTraceValuesPassForFunction },
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{ paths , createProfilePathsPass },
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{ print , createPrintFunctionPass },
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{ printm , createPrintModulePass },
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{ verify , createVerifierPass },
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{ raiseallocs, createRaiseAllocationsPass },
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{ cleangcc , createCleanupGCCOutputPass },
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{ funcresolve, createFunctionResolvingPass },
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{ internalize, createInternalizePass },
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{ globaldce , createGlobalDCEPass },
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{ swapstructs, createSwapElementsPass },
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{ sortstructs, createSortElementsPass },
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{ poolalloc , createPoolAllocatePass },
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};
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// Command line option handling code...
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//
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cl::String InputFilename ("", "Load <arg> file to optimize", cl::NoFlags, "-");
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cl::String OutputFilename("o", "Override output filename", cl::NoFlags, "");
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cl::Flag Force ("f", "Overwrite output files", cl::NoFlags, false);
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cl::Flag PrintEachXForm("p", "Print module after each transformation");
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cl::Flag Quiet ("q", "Don't print modifying pass names", 0, false);
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cl::Alias QuietA ("quiet", "Alias for -q", cl::NoFlags, Quiet);
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cl::EnumList<enum Opts> OptimizationList(cl::NoFlags,
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clEnumVal(dce , "Dead Code Elimination"),
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clEnumVal(die , "Dead Instruction Elimination"),
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clEnumVal(constprop , "Simple constant propogation"),
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clEnumVal(gcse , "Global Common Subexpression Elimination"),
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clEnumValN(inlining , "inline", "Function integration"),
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clEnumVal(constmerge , "Merge identical global constants"),
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clEnumVal(strip , "Strip symbols"),
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clEnumVal(mstrip , "Strip module symbols"),
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clEnumVal(mergereturn, "Unify function exit nodes"),
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clEnumVal(indvars , "Simplify Induction Variables"),
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clEnumVal(instcombine, "Combine redundant instructions"),
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clEnumVal(sccp , "Sparse Conditional Constant Propogation"),
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clEnumVal(adce , "Agressive DCE"),
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clEnumVal(mem2reg , "Promote alloca locations to registers"),
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clEnumVal(internalize, "Mark all fn's internal except for main"),
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clEnumVal(globaldce , "Remove unreachable globals"),
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clEnumVal(swapstructs, "Swap structure types around"),
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clEnumVal(sortstructs, "Sort structure elements"),
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clEnumVal(poolalloc , "Pool allocate disjoint datastructures"),
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clEnumVal(raiseallocs, "Raise allocations from calls to instructions"),
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clEnumVal(cleangcc , "Cleanup GCC Output"),
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clEnumVal(funcresolve, "Resolve calls to foo(...) to foo(<concrete types>)"),
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clEnumVal(raise , "Raise to Higher Level"),
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clEnumVal(trace , "Insert BB and Function trace code"),
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clEnumVal(tracem , "Insert Function trace code only"),
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clEnumVal(paths , "Insert path profiling instrumentation"),
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clEnumVal(print , "Print working function to stderr"),
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clEnumVal(printm , "Print working module to stderr"),
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clEnumVal(verify , "Verify module is well formed"),
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clEnumVal(lowerrefs , "Decompose multi-dimensional structure/array refs to use one index per instruction"),
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0);
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int main(int argc, char **argv) {
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cl::ParseCommandLineOptions(argc, argv,
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" llvm .bc -> .bc modular optimizer\n");
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// Load the input module...
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std::auto_ptr<Module> M(ParseBytecodeFile(InputFilename));
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if (M.get() == 0) {
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cerr << "bytecode didn't read correctly.\n";
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return 1;
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}
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// Figure out what stream we are supposed to write to...
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std::ostream *Out = &std::cout; // Default to printing to stdout...
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if (OutputFilename != "") {
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if (!Force && std::ifstream(OutputFilename.c_str())) {
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// If force is not specified, make sure not to overwrite a file!
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cerr << "Error opening '" << OutputFilename << "': File exists!\n"
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<< "Use -f command line argument to force output\n";
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return 1;
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}
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Out = new std::ofstream(OutputFilename.c_str());
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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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// Make sure that the Output file gets unlink'd from the disk if we get a
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// SIGINT
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RemoveFileOnSignal(OutputFilename);
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}
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// Create a PassManager to hold and optimize the collection of passes we are
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// about to build...
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//
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PassManager Passes;
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// Create a new optimization pass for each one specified on the command line
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for (unsigned i = 0; i < OptimizationList.size(); ++i) {
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enum Opts Opt = OptimizationList[i];
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for (unsigned j = 0; j < sizeof(OptTable)/sizeof(OptTable[0]); ++j)
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if (Opt == OptTable[j].OptID) {
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Passes.add(OptTable[j].PassCtor());
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break;
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}
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if (PrintEachXForm)
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Passes.add(new PrintModulePass(&std::cerr));
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}
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// Check that the module is well formed on completion of optimization
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Passes.add(createVerifierPass());
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// Write bytecode out to disk or cout as the last step...
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Passes.add(new WriteBytecodePass(Out, Out != &std::cout));
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// Now that we have all of the passes ready, run them.
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if (Passes.run(M.get()) && !Quiet)
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cerr << "Program modified.\n";
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return 0;
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}
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