2004-04-02 13:06:57 +08:00
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//===- opt.cpp - The LLVM Modular Optimizer -------------------------------===//
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2005-04-22 08:00:37 +08:00
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//
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2003-10-21 01:47:21 +08:00
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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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2005-04-22 08:00:37 +08:00
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//
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2003-10-21 01:47:21 +08:00
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//===----------------------------------------------------------------------===//
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2001-06-07 04:29:01 +08:00
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//
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// Optimizations may be specified an arbitrary number of times on the command
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2006-08-18 14:34:30 +08:00
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// line, They are run in the order specified.
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2001-06-07 04:29:01 +08:00
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//
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2001-10-18 14:05:15 +08:00
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//===----------------------------------------------------------------------===//
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2001-06-07 04:29:01 +08:00
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#include "llvm/Module.h"
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2002-01-31 08:47:12 +08:00
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#include "llvm/PassManager.h"
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2007-05-06 10:42:03 +08:00
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#include "llvm/Bitcode/ReaderWriter.h"
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2001-10-19 23:39:14 +08:00
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#include "llvm/Assembly/PrintModulePass.h"
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2002-02-21 01:56:53 +08:00
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#include "llvm/Analysis/Verifier.h"
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2007-03-07 08:26:10 +08:00
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#include "llvm/Analysis/LoopPass.h"
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2006-05-12 14:33:49 +08:00
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#include "llvm/Target/TargetData.h"
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2002-09-17 00:09:43 +08:00
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#include "llvm/Target/TargetMachine.h"
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2002-07-27 05:09:32 +08:00
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#include "llvm/Support/PassNameParser.h"
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2004-05-27 13:41:36 +08:00
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#include "llvm/System/Signals.h"
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2006-12-06 09:18:01 +08:00
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#include "llvm/Support/ManagedStatic.h"
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2007-05-06 10:42:03 +08:00
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#include "llvm/Support/MemoryBuffer.h"
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2004-09-02 06:55:40 +08:00
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#include "llvm/Support/PluginLoader.h"
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2006-11-29 07:33:06 +08:00
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#include "llvm/Support/Streams.h"
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2004-09-02 06:55:40 +08:00
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#include "llvm/Support/SystemUtils.h"
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2006-08-21 13:34:03 +08:00
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#include "llvm/LinkAllPasses.h"
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2006-06-08 07:03:13 +08:00
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#include "llvm/LinkAllVMCore.h"
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2006-11-29 08:19:40 +08:00
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#include <iostream>
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2001-10-18 14:13:08 +08:00
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#include <fstream>
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2001-11-27 03:22:39 +08:00
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#include <memory>
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2002-07-24 02:12:22 +08:00
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#include <algorithm>
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2003-11-12 06:41:34 +08:00
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using namespace llvm;
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2002-04-14 02:32:47 +08:00
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2002-07-24 02:12:22 +08:00
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// The OptimizationList is automatically populated with registered Passes by the
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// PassNameParser.
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2002-01-31 08:47:12 +08:00
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//
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2006-08-28 06:07:01 +08:00
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static cl::list<const PassInfo*, bool, PassNameParser>
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PassList(cl::desc("Optimizations available:"));
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2001-06-07 04:29:01 +08:00
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2002-07-24 02:12:22 +08:00
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// Other command line options...
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2002-01-31 08:47:12 +08:00
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//
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2003-05-23 04:13:16 +08:00
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static cl::opt<std::string>
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2006-08-18 14:34:30 +08:00
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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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2002-07-22 10:10:13 +08:00
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2003-05-23 04:13:16 +08:00
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static cl::opt<std::string>
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2002-07-22 10:10:13 +08:00
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OutputFilename("o", cl::desc("Override output filename"),
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2003-12-10 22:41:33 +08:00
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cl::value_desc("filename"), cl::init("-"));
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2002-07-22 10:10:13 +08:00
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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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2003-02-13 02:43:33 +08:00
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static cl::opt<bool>
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2003-02-27 04:00:41 +08:00
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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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2003-02-13 02:43:33 +08:00
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2003-02-13 02:45:08 +08:00
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static cl::opt<bool>
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2003-02-27 04:00:41 +08:00
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NoVerify("disable-verify", cl::desc("Do not verify result module"), cl::Hidden);
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2003-02-13 02:45:08 +08:00
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2007-02-02 22:46:29 +08:00
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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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2002-07-22 10:10:13 +08:00
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static cl::opt<bool>
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2004-05-28 04:32:10 +08:00
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Quiet("q", cl::desc("Obsolete option"), cl::Hidden);
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2002-07-22 10:10:13 +08:00
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2004-05-28 00:28:54 +08:00
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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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2006-08-18 14:34:30 +08:00
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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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// ---------- Define Printers for module and function passes ------------
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namespace {
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struct ModulePassPrinter : public ModulePass {
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2007-05-03 09:11:54 +08:00
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static char ID;
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2006-08-18 14:34:30 +08:00
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const PassInfo *PassToPrint;
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2007-05-02 05:15:47 +08:00
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ModulePassPrinter(const PassInfo *PI) : ModulePass((intptr_t)&ID),
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PassToPrint(PI) {}
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2006-08-18 14:34:30 +08:00
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virtual bool runOnModule(Module &M) {
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if (!Quiet) {
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2006-12-07 09:30:32 +08:00
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cout << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
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getAnalysisID<Pass>(PassToPrint).print(cout, &M);
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2006-08-18 14:34:30 +08:00
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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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2007-05-03 09:11:54 +08:00
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char ModulePassPrinter::ID = 0;
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2006-08-18 14:34:30 +08:00
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struct FunctionPassPrinter : public FunctionPass {
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const PassInfo *PassToPrint;
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2007-05-03 09:11:54 +08:00
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static char ID;
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2007-05-02 05:15:47 +08:00
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FunctionPassPrinter(const PassInfo *PI) : FunctionPass((intptr_t)&ID),
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PassToPrint(PI) {}
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2006-08-18 14:34:30 +08:00
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virtual bool runOnFunction(Function &F) {
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2007-05-02 05:15:47 +08:00
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if (!Quiet) {
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2006-12-07 09:30:32 +08:00
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cout << "Printing analysis '" << PassToPrint->getPassName()
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<< "' for function '" << F.getName() << "':\n";
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2006-08-18 14:34:30 +08:00
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}
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// Get and print pass...
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2006-12-07 09:30:32 +08:00
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getAnalysisID<Pass>(PassToPrint).print(cout, F.getParent());
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2006-08-18 14:34:30 +08:00
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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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2007-05-03 09:11:54 +08:00
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char FunctionPassPrinter::ID = 0;
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2006-08-18 14:34:30 +08:00
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struct BasicBlockPassPrinter : public BasicBlockPass {
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const PassInfo *PassToPrint;
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2007-05-03 09:11:54 +08:00
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static char ID;
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2007-05-02 05:15:47 +08:00
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BasicBlockPassPrinter(const PassInfo *PI)
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: BasicBlockPass((intptr_t)&ID), PassToPrint(PI) {}
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2006-08-18 14:34:30 +08:00
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virtual bool runOnBasicBlock(BasicBlock &BB) {
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if (!Quiet) {
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2006-12-07 09:30:32 +08:00
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cout << "Printing Analysis info for BasicBlock '" << BB.getName()
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<< "': Pass " << PassToPrint->getPassName() << ":\n";
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2006-08-18 14:34:30 +08:00
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}
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// Get and print pass...
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2006-12-07 09:30:32 +08:00
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getAnalysisID<Pass>(PassToPrint).print(cout, BB.getParent()->getParent());
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2006-08-18 14:34:30 +08:00
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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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2007-05-03 09:11:54 +08:00
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char BasicBlockPassPrinter::ID = 0;
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2007-02-02 22:46:29 +08:00
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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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2007-04-10 23:43:36 +08:00
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addPass(PM, createLoopRotatePass());
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2007-02-02 22:46:29 +08:00
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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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2006-08-18 14:34:30 +08:00
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} // anonymous namespace
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2001-06-07 04:29:01 +08:00
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2002-07-24 02:12:22 +08:00
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//===----------------------------------------------------------------------===//
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// main for opt
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//
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2001-07-23 10:35:57 +08:00
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int main(int argc, char **argv) {
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2006-12-06 09:18:01 +08:00
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llvm_shutdown_obj X; // Call llvm_shutdown() on exit.
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2004-12-30 13:36:08 +08:00
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try {
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cl::ParseCommandLineOptions(argc, argv,
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2006-08-18 14:34:30 +08:00
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" llvm .bc -> .bc modular optimizer and analysis printer \n");
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2004-12-30 13:36:08 +08:00
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sys::PrintStackTraceOnErrorSignal();
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2006-08-28 06:07:01 +08:00
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// Allocate a full target machine description only if necessary.
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2004-12-30 13:36:08 +08:00
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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...
|
2007-05-06 10:42:03 +08:00
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std::auto_ptr<Module> M;
|
2007-05-07 07:45:49 +08:00
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if (MemoryBuffer *Buffer
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= MemoryBuffer::getFileOrSTDIN(InputFilename, &ErrorMessage)) {
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2007-05-06 17:32:02 +08:00
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M.reset(ParseBitcodeFile(Buffer, &ErrorMessage));
|
2007-05-07 07:45:49 +08:00
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delete Buffer;
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}
|
2007-05-06 17:32:02 +08:00
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2004-12-30 13:36:08 +08:00
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if (M.get() == 0) {
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2006-12-07 09:30:32 +08:00
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cerr << argv[0] << ": ";
|
2004-12-30 13:36:08 +08:00
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if (ErrorMessage.size())
|
2006-12-07 09:30:32 +08:00
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cerr << ErrorMessage << "\n";
|
2004-12-30 13:36:08 +08:00
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else
|
2006-12-07 09:30:32 +08:00
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|
cerr << "bytecode didn't read correctly.\n";
|
2002-01-21 06:54:45 +08:00
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return 1;
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}
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2004-12-30 13:36:08 +08:00
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// Figure out what stream we are supposed to write to...
|
2005-01-23 01:36:17 +08:00
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// FIXME: cout is not binary!
|
2004-12-30 13:36:08 +08:00
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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!
|
2006-12-07 09:30:32 +08:00
|
|
|
cerr << argv[0] << ": error opening '" << OutputFilename
|
|
|
|
<< "': file exists!\n"
|
|
|
|
<< "Use -f command line argument to force output\n";
|
2004-12-30 13:36:08 +08:00
|
|
|
return 1;
|
|
|
|
}
|
2005-01-23 01:36:17 +08:00
|
|
|
std::ios::openmode io_mode = std::ios::out | std::ios::trunc |
|
|
|
|
std::ios::binary;
|
|
|
|
Out = new std::ofstream(OutputFilename.c_str(), io_mode);
|
2004-12-30 13:36:08 +08:00
|
|
|
|
|
|
|
if (!Out->good()) {
|
2006-12-07 09:30:32 +08:00
|
|
|
cerr << argv[0] << ": error opening " << OutputFilename << "!\n";
|
2004-12-30 13:36:08 +08:00
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
// Make sure that the Output file gets unlinked from the disk if we get a
|
|
|
|
// SIGINT
|
|
|
|
sys::RemoveFileOnSignal(sys::Path(OutputFilename));
|
2001-06-07 04:29:01 +08:00
|
|
|
}
|
2002-04-19 03:55:25 +08:00
|
|
|
|
2004-12-30 13:36:08 +08:00
|
|
|
// If the output is set to be emitted to standard out, and standard out is a
|
2005-01-23 01:36:17 +08:00
|
|
|
// 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.
|
2005-01-06 01:31:55 +08:00
|
|
|
if (!Force && !NoOutput && CheckBytecodeOutputToConsole(Out,!Quiet)) {
|
2004-12-30 13:36:08 +08:00
|
|
|
NoOutput = true;
|
|
|
|
}
|
2004-04-02 13:06:57 +08:00
|
|
|
|
2004-12-30 13:36:08 +08:00
|
|
|
// 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...
|
2006-06-17 02:23:49 +08:00
|
|
|
Passes.add(new TargetData(M.get()));
|
2004-12-30 13:36:08 +08:00
|
|
|
|
2007-02-02 22:46:29 +08:00
|
|
|
// If -std-compile-opts is given, add in all the standard compilation
|
|
|
|
// optimizations first. This will handle -strip-debug, -disable-inline,
|
|
|
|
// and -disable-opt as well.
|
|
|
|
if (StandardCompileOpts)
|
|
|
|
AddStandardCompilePasses(Passes);
|
|
|
|
|
|
|
|
// otherwise if the -strip-debug command line option was specified, add it.
|
|
|
|
else if (StripDebug)
|
|
|
|
addPass(Passes, createStripSymbolsPass(true));
|
|
|
|
|
2004-12-30 13:36:08 +08:00
|
|
|
// Create a new optimization pass for each one specified on the command line
|
2006-08-28 06:07:01 +08:00
|
|
|
for (unsigned i = 0; i < PassList.size(); ++i) {
|
|
|
|
const PassInfo *PassInf = PassList[i];
|
|
|
|
Pass *P = 0;
|
|
|
|
if (PassInf->getNormalCtor())
|
|
|
|
P = PassInf->getNormalCtor()();
|
2006-12-02 05:59:37 +08:00
|
|
|
else
|
2006-12-07 09:30:32 +08:00
|
|
|
cerr << argv[0] << ": cannot create pass: "
|
|
|
|
<< PassInf->getPassName() << "\n";
|
2006-08-28 06:07:01 +08:00
|
|
|
if (P) {
|
2007-02-02 22:46:29 +08:00
|
|
|
addPass(Passes, P);
|
2006-08-28 06:07:01 +08:00
|
|
|
|
|
|
|
if (AnalyzeOnly) {
|
2006-11-03 04:25:50 +08:00
|
|
|
if (dynamic_cast<BasicBlockPass*>(P))
|
2006-08-28 06:07:01 +08:00
|
|
|
Passes.add(new BasicBlockPassPrinter(PassInf));
|
2006-11-03 04:25:50 +08:00
|
|
|
else if (dynamic_cast<FunctionPass*>(P))
|
2006-08-28 06:07:01 +08:00
|
|
|
Passes.add(new FunctionPassPrinter(PassInf));
|
|
|
|
else
|
|
|
|
Passes.add(new ModulePassPrinter(PassInf));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2004-12-30 13:36:08 +08:00
|
|
|
if (PrintEachXForm)
|
2006-12-07 09:30:32 +08:00
|
|
|
Passes.add(new PrintModulePass(&cerr));
|
2004-12-30 13:36:08 +08:00
|
|
|
}
|
2002-01-31 08:47:12 +08:00
|
|
|
|
2004-12-30 13:36:08 +08:00
|
|
|
// Check that the module is well formed on completion of optimization
|
2007-02-02 22:46:29 +08:00
|
|
|
if (!NoVerify && !VerifyEach)
|
2004-12-30 13:36:08 +08:00
|
|
|
Passes.add(createVerifierPass());
|
2002-02-21 01:56:53 +08:00
|
|
|
|
2004-12-30 13:36:08 +08:00
|
|
|
// Write bytecode out to disk or cout as the last step...
|
2007-05-06 17:32:02 +08:00
|
|
|
if (!NoOutput && !AnalyzeOnly)
|
|
|
|
Passes.add(CreateBitcodeWriterPass(*Out));
|
2002-01-31 08:47:12 +08:00
|
|
|
|
2004-12-30 13:36:08 +08:00
|
|
|
// Now that we have all of the passes ready, run them.
|
|
|
|
Passes.run(*M.get());
|
2001-06-07 04:29:01 +08:00
|
|
|
|
2007-05-07 03:17:23 +08:00
|
|
|
// Delete the ofstream.
|
|
|
|
if (Out != &std::cout)
|
|
|
|
delete Out;
|
2004-12-30 13:36:08 +08:00
|
|
|
return 0;
|
2006-08-18 14:34:30 +08:00
|
|
|
|
2004-12-30 13:36:08 +08:00
|
|
|
} catch (const std::string& msg) {
|
2006-12-07 09:30:32 +08:00
|
|
|
cerr << argv[0] << ": " << msg << "\n";
|
2004-12-30 13:36:08 +08:00
|
|
|
} catch (...) {
|
2006-12-07 09:30:32 +08:00
|
|
|
cerr << argv[0] << ": Unexpected unknown exception occurred.\n";
|
2004-12-30 13:36:08 +08:00
|
|
|
}
|
2007-01-31 12:45:28 +08:00
|
|
|
llvm_shutdown();
|
2004-12-30 13:36:08 +08:00
|
|
|
return 1;
|
2001-06-07 04:29:01 +08:00
|
|
|
}
|