mirror of
https://github.com/c64scene-ar/llvm-6502.git
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ef9b9a7939
This patch replaces the SymbolTable class with ValueSymbolTable which does not support types planes. This means that all symbol names in LLVM must now be unique. The patch addresses the necessary changes to deal with this and removes code no longer needed as a result. This completes the bulk of the changes for this PR. Some cleanup patches will follow. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33918 91177308-0d34-0410-b5e6-96231b3b80d8
365 lines
13 KiB
C++
365 lines
13 KiB
C++
//===- opt.cpp - The LLVM Modular Optimizer -------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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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/Target/TargetData.h"
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#include "llvm/Target/TargetMachine.h"
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#include "llvm/Support/PassNameParser.h"
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#include "llvm/System/Signals.h"
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#include "llvm/Support/ManagedStatic.h"
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#include "llvm/Support/PluginLoader.h"
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#include "llvm/Support/Streams.h"
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#include "llvm/Support/SystemUtils.h"
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#include "llvm/Support/Timer.h"
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#include "llvm/LinkAllPasses.h"
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#include "llvm/LinkAllVMCore.h"
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#include <iostream>
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#include <fstream>
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#include <memory>
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#include <algorithm>
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using namespace llvm;
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// The OptimizationList is automatically populated with registered Passes by the
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// PassNameParser.
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//
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static cl::list<const PassInfo*, bool, PassNameParser>
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PassList(cl::desc("Optimizations available:"));
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static cl::opt<bool> NoCompress("disable-compression", cl::init(true),
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cl::desc("Don't compress the generated bytecode"));
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// Other command line options...
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//
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static cl::opt<std::string>
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InputFilename(cl::Positional, cl::desc("<input bytecode file>"),
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cl::init("-"), cl::value_desc("filename"));
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static cl::opt<std::string>
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OutputFilename("o", cl::desc("Override output filename"),
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cl::value_desc("filename"), cl::init("-"));
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static cl::opt<bool>
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Force("f", cl::desc("Overwrite output files"));
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static cl::opt<bool>
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PrintEachXForm("p", cl::desc("Print module after each transformation"));
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static cl::opt<bool>
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NoOutput("disable-output",
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cl::desc("Do not write result bytecode file"), cl::Hidden);
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static cl::opt<bool>
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NoVerify("disable-verify", cl::desc("Do not verify result module"), cl::Hidden);
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static cl::opt<bool>
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VerifyEach("verify-each", cl::desc("Verify after each transform"));
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static cl::opt<bool>
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StripDebug("strip-debug",
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cl::desc("Strip debugger symbol info from translation unit"));
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static cl::opt<bool>
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DisableInline("disable-inlining", cl::desc("Do not run the inliner pass"));
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static cl::opt<bool>
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DisableOptimizations("disable-opt",
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cl::desc("Do not run any optimization passes"));
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static cl::opt<bool>
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StandardCompileOpts("std-compile-opts",
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cl::desc("Include the standard compile time optimizations"));
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static cl::opt<bool>
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Quiet("q", cl::desc("Obsolete option"), cl::Hidden);
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static cl::alias
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QuietA("quiet", cl::desc("Alias for -q"), cl::aliasopt(Quiet));
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static cl::opt<bool>
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AnalyzeOnly("analyze", cl::desc("Only perform analysis, no optimization"));
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static Timer BytecodeLoadTimer("Bytecode Loader");
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// ---------- Define Printers for module and function passes ------------
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namespace {
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struct ModulePassPrinter : public ModulePass {
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const PassInfo *PassToPrint;
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ModulePassPrinter(const PassInfo *PI) : PassToPrint(PI) {}
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virtual bool runOnModule(Module &M) {
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if (!Quiet) {
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cout << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
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getAnalysisID<Pass>(PassToPrint).print(cout, &M);
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}
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// Get and print pass...
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return false;
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}
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virtual const char *getPassName() const { return "'Pass' Printer"; }
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virtual void getAnalysisUsage(AnalysisUsage &AU) const {
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AU.addRequiredID(PassToPrint);
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AU.setPreservesAll();
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}
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};
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struct FunctionPassPrinter : public FunctionPass {
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const PassInfo *PassToPrint;
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FunctionPassPrinter(const PassInfo *PI) : PassToPrint(PI) {}
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virtual bool runOnFunction(Function &F) {
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if (!Quiet) {
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cout << "Printing analysis '" << PassToPrint->getPassName()
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<< "' for function '" << F.getName() << "':\n";
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}
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// Get and print pass...
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getAnalysisID<Pass>(PassToPrint).print(cout, F.getParent());
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return false;
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}
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virtual const char *getPassName() const { return "FunctionPass Printer"; }
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virtual void getAnalysisUsage(AnalysisUsage &AU) const {
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AU.addRequiredID(PassToPrint);
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AU.setPreservesAll();
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}
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};
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struct BasicBlockPassPrinter : public BasicBlockPass {
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const PassInfo *PassToPrint;
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BasicBlockPassPrinter(const PassInfo *PI) : PassToPrint(PI) {}
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virtual bool runOnBasicBlock(BasicBlock &BB) {
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if (!Quiet) {
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cout << "Printing Analysis info for BasicBlock '" << BB.getName()
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<< "': Pass " << PassToPrint->getPassName() << ":\n";
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}
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// Get and print pass...
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getAnalysisID<Pass>(PassToPrint).print(cout, BB.getParent()->getParent());
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return false;
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}
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virtual const char *getPassName() const { return "BasicBlockPass Printer"; }
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virtual void getAnalysisUsage(AnalysisUsage &AU) const {
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AU.addRequiredID(PassToPrint);
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AU.setPreservesAll();
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}
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};
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inline void addPass(PassManager &PM, Pass *P) {
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// Add the pass to the pass manager...
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PM.add(P);
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// If we are verifying all of the intermediate steps, add the verifier...
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if (VerifyEach) PM.add(createVerifierPass());
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}
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void AddStandardCompilePasses(PassManager &PM) {
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PM.add(createVerifierPass()); // Verify that input is correct
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addPass(PM, createLowerSetJmpPass()); // Lower llvm.setjmp/.longjmp
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// If the -strip-debug command line option was specified, do it.
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if (StripDebug)
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addPass(PM, createStripSymbolsPass(true));
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if (DisableOptimizations) return;
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addPass(PM, createRaiseAllocationsPass()); // call %malloc -> malloc inst
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addPass(PM, createCFGSimplificationPass()); // Clean up disgusting code
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addPass(PM, createPromoteMemoryToRegisterPass());// Kill useless allocas
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addPass(PM, createGlobalOptimizerPass()); // Optimize out global vars
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addPass(PM, createGlobalDCEPass()); // Remove unused fns and globs
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addPass(PM, createIPConstantPropagationPass());// IP Constant Propagation
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addPass(PM, createDeadArgEliminationPass()); // Dead argument elimination
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addPass(PM, createInstructionCombiningPass()); // Clean up after IPCP & DAE
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addPass(PM, createCFGSimplificationPass()); // Clean up after IPCP & DAE
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addPass(PM, createPruneEHPass()); // Remove dead EH info
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if (!DisableInline)
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addPass(PM, createFunctionInliningPass()); // Inline small functions
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addPass(PM, createArgumentPromotionPass()); // Scalarize uninlined fn args
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addPass(PM, createTailDuplicationPass()); // Simplify cfg by copying code
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addPass(PM, createInstructionCombiningPass()); // Cleanup for scalarrepl.
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addPass(PM, createCFGSimplificationPass()); // Merge & remove BBs
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addPass(PM, createScalarReplAggregatesPass()); // Break up aggregate allocas
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addPass(PM, createInstructionCombiningPass()); // Combine silly seq's
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addPass(PM, createCondPropagationPass()); // Propagate conditionals
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addPass(PM, createTailCallEliminationPass()); // Eliminate tail calls
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addPass(PM, createCFGSimplificationPass()); // Merge & remove BBs
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addPass(PM, createReassociatePass()); // Reassociate expressions
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addPass(PM, createLICMPass()); // Hoist loop invariants
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addPass(PM, createLoopUnswitchPass()); // Unswitch loops.
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addPass(PM, createInstructionCombiningPass()); // Clean up after LICM/reassoc
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addPass(PM, createIndVarSimplifyPass()); // Canonicalize indvars
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addPass(PM, createLoopUnrollPass()); // Unroll small loops
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addPass(PM, createInstructionCombiningPass()); // Clean up after the unroller
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addPass(PM, createLoadValueNumberingPass()); // GVN for load instructions
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addPass(PM, createGCSEPass()); // Remove common subexprs
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addPass(PM, createSCCPPass()); // Constant prop with SCCP
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// Run instcombine after redundancy elimination to exploit opportunities
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// opened up by them.
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addPass(PM, createInstructionCombiningPass());
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addPass(PM, createCondPropagationPass()); // Propagate conditionals
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addPass(PM, createDeadStoreEliminationPass()); // Delete dead stores
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addPass(PM, createAggressiveDCEPass()); // SSA based 'Aggressive DCE'
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addPass(PM, createCFGSimplificationPass()); // Merge & remove BBs
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addPass(PM, createSimplifyLibCallsPass()); // Library Call Optimizations
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addPass(PM, createDeadTypeEliminationPass()); // Eliminate dead types
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addPass(PM, createConstantMergePass()); // Merge dup global constants
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}
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} // anonymous namespace
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//===----------------------------------------------------------------------===//
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// main for opt
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//
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int main(int argc, char **argv) {
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llvm_shutdown_obj X; // Call llvm_shutdown() on exit.
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try {
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cl::ParseCommandLineOptions(argc, argv,
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" llvm .bc -> .bc modular optimizer and analysis printer \n");
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sys::PrintStackTraceOnErrorSignal();
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// Allocate a full target machine description only if necessary.
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// FIXME: The choice of target should be controllable on the command line.
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std::auto_ptr<TargetMachine> target;
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std::string ErrorMessage;
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// Load the input module...
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std::auto_ptr<Module> M(ParseBytecodeFile(InputFilename, &ErrorMessage));
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if (M.get() == 0) {
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cerr << argv[0] << ": ";
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if (ErrorMessage.size())
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cerr << ErrorMessage << "\n";
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else
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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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// FIXME: cout is not binary!
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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 << argv[0] << ": error opening '" << OutputFilename
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<< "': 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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std::ios::openmode io_mode = std::ios::out | std::ios::trunc |
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std::ios::binary;
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Out = new std::ofstream(OutputFilename.c_str(), io_mode);
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if (!Out->good()) {
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cerr << argv[0] << ": 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 unlinked from the disk if we get a
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// SIGINT
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sys::RemoveFileOnSignal(sys::Path(OutputFilename));
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}
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// If the output is set to be emitted to standard out, and standard out is a
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// console, print out a warning message and refuse to do it. We don't
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// impress anyone by spewing tons of binary goo to a terminal.
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if (!Force && !NoOutput && CheckBytecodeOutputToConsole(Out,!Quiet)) {
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NoOutput = true;
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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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// Add an appropriate TargetData instance for this module...
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Passes.add(new TargetData(M.get()));
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// If -std-compile-opts is given, add in all the standard compilation
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// optimizations first. This will handle -strip-debug, -disable-inline,
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// and -disable-opt as well.
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if (StandardCompileOpts)
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AddStandardCompilePasses(Passes);
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// otherwise if the -strip-debug command line option was specified, add it.
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else if (StripDebug)
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addPass(Passes, createStripSymbolsPass(true));
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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 < PassList.size(); ++i) {
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const PassInfo *PassInf = PassList[i];
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Pass *P = 0;
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if (PassInf->getNormalCtor())
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P = PassInf->getNormalCtor()();
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else
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cerr << argv[0] << ": cannot create pass: "
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<< PassInf->getPassName() << "\n";
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if (P) {
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addPass(Passes, P);
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if (AnalyzeOnly) {
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if (dynamic_cast<BasicBlockPass*>(P))
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Passes.add(new BasicBlockPassPrinter(PassInf));
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else if (dynamic_cast<FunctionPass*>(P))
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Passes.add(new FunctionPassPrinter(PassInf));
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else
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Passes.add(new ModulePassPrinter(PassInf));
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}
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}
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if (PrintEachXForm)
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Passes.add(new PrintModulePass(&cerr));
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}
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// Check that the module is well formed on completion of optimization
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if (!NoVerify && !VerifyEach)
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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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OStream L(*Out);
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if (!NoOutput && !AnalyzeOnly)
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Passes.add(new WriteBytecodePass(&L, false, !NoCompress));
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// Now that we have all of the passes ready, run them.
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Passes.run(*M.get());
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return 0;
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} catch (const std::string& msg) {
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cerr << argv[0] << ": " << msg << "\n";
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} catch (...) {
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cerr << argv[0] << ": Unexpected unknown exception occurred.\n";
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}
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llvm_shutdown();
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return 1;
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}
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