mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-21 00:32:23 +00:00
fa191e4cd4
the end. It is now run at the same moment as in llvm-gcc. Also, run StripDeadPrototypes at the end, just before running DeadTypeElimination. This may be useful when doing LTO. Note that llvm-gcc runs StripDeadPrototypes but not DeadTypeElimination. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49848 91177308-0d34-0410-b5e6-96231b3b80d8
443 lines
15 KiB
C++
443 lines
15 KiB
C++
//===- opt.cpp - The LLVM Modular Optimizer -------------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Optimizations may be specified an arbitrary number of times on the command
|
|
// line, They are run in the order specified.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Module.h"
|
|
#include "llvm/PassManager.h"
|
|
#include "llvm/CallGraphSCCPass.h"
|
|
#include "llvm/Bitcode/ReaderWriter.h"
|
|
#include "llvm/Assembly/PrintModulePass.h"
|
|
#include "llvm/Analysis/Verifier.h"
|
|
#include "llvm/Analysis/LoopPass.h"
|
|
#include "llvm/Analysis/CallGraph.h"
|
|
#include "llvm/Target/TargetData.h"
|
|
#include "llvm/Target/TargetMachine.h"
|
|
#include "llvm/Support/PassNameParser.h"
|
|
#include "llvm/System/Signals.h"
|
|
#include "llvm/Support/ManagedStatic.h"
|
|
#include "llvm/Support/MemoryBuffer.h"
|
|
#include "llvm/Support/PluginLoader.h"
|
|
#include "llvm/Support/Streams.h"
|
|
#include "llvm/Support/SystemUtils.h"
|
|
#include "llvm/LinkAllPasses.h"
|
|
#include "llvm/LinkAllVMCore.h"
|
|
#include <iostream>
|
|
#include <fstream>
|
|
#include <memory>
|
|
#include <algorithm>
|
|
using namespace llvm;
|
|
|
|
// The OptimizationList is automatically populated with registered Passes by the
|
|
// PassNameParser.
|
|
//
|
|
static cl::list<const PassInfo*, bool, PassNameParser>
|
|
PassList(cl::desc("Optimizations available:"));
|
|
|
|
// Other command line options...
|
|
//
|
|
static cl::opt<std::string>
|
|
InputFilename(cl::Positional, cl::desc("<input bitcode file>"),
|
|
cl::init("-"), cl::value_desc("filename"));
|
|
|
|
static cl::opt<std::string>
|
|
OutputFilename("o", cl::desc("Override output filename"),
|
|
cl::value_desc("filename"), cl::init("-"));
|
|
|
|
static cl::opt<bool>
|
|
Force("f", cl::desc("Overwrite output files"));
|
|
|
|
static cl::opt<bool>
|
|
PrintEachXForm("p", cl::desc("Print module after each transformation"));
|
|
|
|
static cl::opt<bool>
|
|
NoOutput("disable-output",
|
|
cl::desc("Do not write result bitcode file"), cl::Hidden);
|
|
|
|
static cl::opt<bool>
|
|
NoVerify("disable-verify", cl::desc("Do not verify result module"), cl::Hidden);
|
|
|
|
static cl::opt<bool>
|
|
VerifyEach("verify-each", cl::desc("Verify after each transform"));
|
|
|
|
static cl::opt<bool>
|
|
StripDebug("strip-debug",
|
|
cl::desc("Strip debugger symbol info from translation unit"));
|
|
|
|
static cl::opt<bool>
|
|
DisableInline("disable-inlining", cl::desc("Do not run the inliner pass"));
|
|
|
|
static cl::opt<bool>
|
|
DisableOptimizations("disable-opt",
|
|
cl::desc("Do not run any optimization passes"));
|
|
|
|
static cl::opt<bool>
|
|
StandardCompileOpts("std-compile-opts",
|
|
cl::desc("Include the standard compile time optimizations"));
|
|
|
|
static cl::opt<bool>
|
|
Quiet("q", cl::desc("Obsolete option"), cl::Hidden);
|
|
|
|
static cl::alias
|
|
QuietA("quiet", cl::desc("Alias for -q"), cl::aliasopt(Quiet));
|
|
|
|
static cl::opt<bool>
|
|
AnalyzeOnly("analyze", cl::desc("Only perform analysis, no optimization"));
|
|
|
|
// ---------- Define Printers for module and function passes ------------
|
|
namespace {
|
|
|
|
struct CallGraphSCCPassPrinter : public CallGraphSCCPass {
|
|
static char ID;
|
|
const PassInfo *PassToPrint;
|
|
CallGraphSCCPassPrinter(const PassInfo *PI) :
|
|
CallGraphSCCPass((intptr_t)&ID), PassToPrint(PI) {}
|
|
|
|
virtual bool runOnSCC(const std::vector<CallGraphNode *>&SCC) {
|
|
if (!Quiet) {
|
|
cout << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
|
|
|
|
for (unsigned i = 0, e = SCC.size(); i != e; ++i) {
|
|
Function *F = SCC[i]->getFunction();
|
|
if (F)
|
|
getAnalysisID<Pass>(PassToPrint).print(cout, F->getParent());
|
|
}
|
|
}
|
|
// Get and print pass...
|
|
return false;
|
|
}
|
|
|
|
virtual const char *getPassName() const { return "'Pass' Printer"; }
|
|
|
|
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
|
|
AU.addRequiredID(PassToPrint);
|
|
AU.setPreservesAll();
|
|
}
|
|
};
|
|
|
|
char CallGraphSCCPassPrinter::ID = 0;
|
|
|
|
struct ModulePassPrinter : public ModulePass {
|
|
static char ID;
|
|
const PassInfo *PassToPrint;
|
|
ModulePassPrinter(const PassInfo *PI) : ModulePass((intptr_t)&ID),
|
|
PassToPrint(PI) {}
|
|
|
|
virtual bool runOnModule(Module &M) {
|
|
if (!Quiet) {
|
|
cout << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
|
|
getAnalysisID<Pass>(PassToPrint).print(cout, &M);
|
|
}
|
|
|
|
// Get and print pass...
|
|
return false;
|
|
}
|
|
|
|
virtual const char *getPassName() const { return "'Pass' Printer"; }
|
|
|
|
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
|
|
AU.addRequiredID(PassToPrint);
|
|
AU.setPreservesAll();
|
|
}
|
|
};
|
|
|
|
char ModulePassPrinter::ID = 0;
|
|
struct FunctionPassPrinter : public FunctionPass {
|
|
const PassInfo *PassToPrint;
|
|
static char ID;
|
|
FunctionPassPrinter(const PassInfo *PI) : FunctionPass((intptr_t)&ID),
|
|
PassToPrint(PI) {}
|
|
|
|
virtual bool runOnFunction(Function &F) {
|
|
if (!Quiet) {
|
|
cout << "Printing analysis '" << PassToPrint->getPassName()
|
|
<< "' for function '" << F.getName() << "':\n";
|
|
}
|
|
// Get and print pass...
|
|
getAnalysisID<Pass>(PassToPrint).print(cout, F.getParent());
|
|
return false;
|
|
}
|
|
|
|
virtual const char *getPassName() const { return "FunctionPass Printer"; }
|
|
|
|
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
|
|
AU.addRequiredID(PassToPrint);
|
|
AU.setPreservesAll();
|
|
}
|
|
};
|
|
|
|
char FunctionPassPrinter::ID = 0;
|
|
|
|
struct LoopPassPrinter : public LoopPass {
|
|
static char ID;
|
|
const PassInfo *PassToPrint;
|
|
LoopPassPrinter(const PassInfo *PI) :
|
|
LoopPass((intptr_t)&ID), PassToPrint(PI) {}
|
|
|
|
virtual bool runOnLoop(Loop *L, LPPassManager &LPM) {
|
|
if (!Quiet) {
|
|
cout << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
|
|
getAnalysisID<Pass>(PassToPrint).print(cout,
|
|
L->getHeader()->getParent()->getParent());
|
|
}
|
|
// Get and print pass...
|
|
return false;
|
|
}
|
|
|
|
virtual const char *getPassName() const { return "'Pass' Printer"; }
|
|
|
|
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
|
|
AU.addRequiredID(PassToPrint);
|
|
AU.setPreservesAll();
|
|
}
|
|
};
|
|
|
|
char LoopPassPrinter::ID = 0;
|
|
|
|
struct BasicBlockPassPrinter : public BasicBlockPass {
|
|
const PassInfo *PassToPrint;
|
|
static char ID;
|
|
BasicBlockPassPrinter(const PassInfo *PI)
|
|
: BasicBlockPass((intptr_t)&ID), PassToPrint(PI) {}
|
|
|
|
virtual bool runOnBasicBlock(BasicBlock &BB) {
|
|
if (!Quiet) {
|
|
cout << "Printing Analysis info for BasicBlock '" << BB.getName()
|
|
<< "': Pass " << PassToPrint->getPassName() << ":\n";
|
|
}
|
|
|
|
// Get and print pass...
|
|
getAnalysisID<Pass>(PassToPrint).print(cout, BB.getParent()->getParent());
|
|
return false;
|
|
}
|
|
|
|
virtual const char *getPassName() const { return "BasicBlockPass Printer"; }
|
|
|
|
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
|
|
AU.addRequiredID(PassToPrint);
|
|
AU.setPreservesAll();
|
|
}
|
|
};
|
|
|
|
char BasicBlockPassPrinter::ID = 0;
|
|
inline void addPass(PassManager &PM, Pass *P) {
|
|
// Add the pass to the pass manager...
|
|
PM.add(P);
|
|
|
|
// If we are verifying all of the intermediate steps, add the verifier...
|
|
if (VerifyEach) PM.add(createVerifierPass());
|
|
}
|
|
|
|
void AddStandardCompilePasses(PassManager &PM) {
|
|
PM.add(createVerifierPass()); // Verify that input is correct
|
|
|
|
addPass(PM, createLowerSetJmpPass()); // Lower llvm.setjmp/.longjmp
|
|
|
|
// If the -strip-debug command line option was specified, do it.
|
|
if (StripDebug)
|
|
addPass(PM, createStripSymbolsPass(true));
|
|
|
|
if (DisableOptimizations) return;
|
|
|
|
addPass(PM, createRaiseAllocationsPass()); // call %malloc -> malloc inst
|
|
addPass(PM, createCFGSimplificationPass()); // Clean up disgusting code
|
|
addPass(PM, createPromoteMemoryToRegisterPass());// Kill useless allocas
|
|
addPass(PM, createGlobalOptimizerPass()); // Optimize out global vars
|
|
addPass(PM, createGlobalDCEPass()); // Remove unused fns and globs
|
|
addPass(PM, createIPConstantPropagationPass());// IP Constant Propagation
|
|
addPass(PM, createDeadArgEliminationPass()); // Dead argument elimination
|
|
addPass(PM, createInstructionCombiningPass()); // Clean up after IPCP & DAE
|
|
addPass(PM, createCFGSimplificationPass()); // Clean up after IPCP & DAE
|
|
|
|
addPass(PM, createPruneEHPass()); // Remove dead EH info
|
|
|
|
if (!DisableInline)
|
|
addPass(PM, createFunctionInliningPass()); // Inline small functions
|
|
addPass(PM, createSimplifyLibCallsPass()); // Library Call Optimizations
|
|
addPass(PM, createArgumentPromotionPass()); // Scalarize uninlined fn args
|
|
|
|
addPass(PM, createTailDuplicationPass()); // Simplify cfg by copying code
|
|
addPass(PM, createInstructionCombiningPass()); // Cleanup for scalarrepl.
|
|
addPass(PM, createCFGSimplificationPass()); // Merge & remove BBs
|
|
addPass(PM, createScalarReplAggregatesPass()); // Break up aggregate allocas
|
|
addPass(PM, createInstructionCombiningPass()); // Combine silly seq's
|
|
addPass(PM, createCondPropagationPass()); // Propagate conditionals
|
|
|
|
addPass(PM, createTailCallEliminationPass()); // Eliminate tail calls
|
|
addPass(PM, createCFGSimplificationPass()); // Merge & remove BBs
|
|
addPass(PM, createReassociatePass()); // Reassociate expressions
|
|
addPass(PM, createLoopRotatePass());
|
|
addPass(PM, createLICMPass()); // Hoist loop invariants
|
|
addPass(PM, createLoopUnswitchPass()); // Unswitch loops.
|
|
addPass(PM, createLoopIndexSplitPass()); // Index split loops.
|
|
addPass(PM, createInstructionCombiningPass()); // Clean up after LICM/reassoc
|
|
addPass(PM, createIndVarSimplifyPass()); // Canonicalize indvars
|
|
addPass(PM, createLoopUnrollPass()); // Unroll small loops
|
|
addPass(PM, createInstructionCombiningPass()); // Clean up after the unroller
|
|
addPass(PM, createGVNPass()); // Remove redundancies
|
|
addPass(PM, createMemCpyOptPass()); // Remove memcpy / form memset
|
|
addPass(PM, createSCCPPass()); // Constant prop with SCCP
|
|
|
|
// Run instcombine after redundancy elimination to exploit opportunities
|
|
// opened up by them.
|
|
addPass(PM, createInstructionCombiningPass());
|
|
addPass(PM, createCondPropagationPass()); // Propagate conditionals
|
|
|
|
addPass(PM, createDeadStoreEliminationPass()); // Delete dead stores
|
|
addPass(PM, createAggressiveDCEPass()); // SSA based 'Aggressive DCE'
|
|
addPass(PM, createCFGSimplificationPass()); // Merge & remove BBs
|
|
addPass(PM, createStripDeadPrototypesPass()); // Get rid of dead prototypes
|
|
addPass(PM, createDeadTypeEliminationPass()); // Eliminate dead types
|
|
addPass(PM, createConstantMergePass()); // Merge dup global constants
|
|
}
|
|
|
|
} // anonymous namespace
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// main for opt
|
|
//
|
|
int main(int argc, char **argv) {
|
|
llvm_shutdown_obj X; // Call llvm_shutdown() on exit.
|
|
try {
|
|
cl::ParseCommandLineOptions(argc, argv,
|
|
"llvm .bc -> .bc modular optimizer and analysis printer\n");
|
|
sys::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;
|
|
|
|
std::string ErrorMessage;
|
|
|
|
// Load the input module...
|
|
std::auto_ptr<Module> M;
|
|
if (MemoryBuffer *Buffer
|
|
= MemoryBuffer::getFileOrSTDIN(InputFilename, &ErrorMessage)) {
|
|
M.reset(ParseBitcodeFile(Buffer, &ErrorMessage));
|
|
delete Buffer;
|
|
}
|
|
|
|
if (M.get() == 0) {
|
|
cerr << argv[0] << ": ";
|
|
if (ErrorMessage.size())
|
|
cerr << ErrorMessage << "\n";
|
|
else
|
|
cerr << "bitcode didn't read correctly.\n";
|
|
return 1;
|
|
}
|
|
|
|
// Figure out what stream we are supposed to write to...
|
|
// FIXME: cout is not binary!
|
|
std::ostream *Out = &std::cout; // Default to printing to stdout...
|
|
if (OutputFilename != "-") {
|
|
if (!Force && std::ifstream(OutputFilename.c_str())) {
|
|
// If force is not specified, make sure not to overwrite a file!
|
|
cerr << argv[0] << ": error opening '" << OutputFilename
|
|
<< "': file exists!\n"
|
|
<< "Use -f command line argument to force output\n";
|
|
return 1;
|
|
}
|
|
std::ios::openmode io_mode = std::ios::out | std::ios::trunc |
|
|
std::ios::binary;
|
|
Out = new std::ofstream(OutputFilename.c_str(), io_mode);
|
|
|
|
if (!Out->good()) {
|
|
cerr << argv[0] << ": error opening " << OutputFilename << "!\n";
|
|
return 1;
|
|
}
|
|
|
|
// Make sure that the Output file gets unlinked from the disk if we get a
|
|
// SIGINT
|
|
sys::RemoveFileOnSignal(sys::Path(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 (!Force && !NoOutput && CheckBitcodeOutputToConsole(Out,!Quiet)) {
|
|
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(M.get()));
|
|
|
|
// 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));
|
|
|
|
// Create a new optimization pass for each one specified on the command line
|
|
for (unsigned i = 0; i < PassList.size(); ++i) {
|
|
const PassInfo *PassInf = PassList[i];
|
|
Pass *P = 0;
|
|
if (PassInf->getNormalCtor())
|
|
P = PassInf->getNormalCtor()();
|
|
else
|
|
cerr << argv[0] << ": cannot create pass: "
|
|
<< PassInf->getPassName() << "\n";
|
|
if (P) {
|
|
addPass(Passes, P);
|
|
|
|
if (AnalyzeOnly) {
|
|
if (dynamic_cast<BasicBlockPass*>(P))
|
|
Passes.add(new BasicBlockPassPrinter(PassInf));
|
|
else if (dynamic_cast<LoopPass*>(P))
|
|
Passes.add(new LoopPassPrinter(PassInf));
|
|
else if (dynamic_cast<FunctionPass*>(P))
|
|
Passes.add(new FunctionPassPrinter(PassInf));
|
|
else if (dynamic_cast<CallGraphSCCPass*>(P))
|
|
Passes.add(new CallGraphSCCPassPrinter(PassInf));
|
|
else
|
|
Passes.add(new ModulePassPrinter(PassInf));
|
|
}
|
|
}
|
|
|
|
if (PrintEachXForm)
|
|
Passes.add(new PrintModulePass(&cerr));
|
|
}
|
|
|
|
// Check that the module is well formed on completion of optimization
|
|
if (!NoVerify && !VerifyEach)
|
|
Passes.add(createVerifierPass());
|
|
|
|
// Write bitcode out to disk or cout as the last step...
|
|
if (!NoOutput && !AnalyzeOnly)
|
|
Passes.add(CreateBitcodeWriterPass(*Out));
|
|
|
|
// Now that we have all of the passes ready, run them.
|
|
Passes.run(*M.get());
|
|
|
|
// Delete the ofstream.
|
|
if (Out != &std::cout)
|
|
delete Out;
|
|
return 0;
|
|
|
|
} catch (const std::string& msg) {
|
|
cerr << argv[0] << ": " << msg << "\n";
|
|
} catch (...) {
|
|
cerr << argv[0] << ": Unexpected unknown exception occurred.\n";
|
|
}
|
|
llvm_shutdown();
|
|
return 1;
|
|
}
|