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https://github.com/c64scene-ar/llvm-6502.git
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61b1851a20
Also refactor the existing OProfile profiling code to reuse the same interfaces with the VTune profiling code. In addition, unit tests for the profiling interfaces were added. This patch was prepared by Andrew Kaylor and Daniel Malea, and reviewed in the llvm-commits list by Jim Grosbach git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152620 91177308-0d34-0410-b5e6-96231b3b80d8
316 lines
10 KiB
C++
316 lines
10 KiB
C++
//===- lli.cpp - LLVM Interpreter / Dynamic compiler ----------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This utility provides a simple wrapper around the LLVM Execution Engines,
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// which allow the direct execution of LLVM programs through a Just-In-Time
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// compiler, or through an interpreter if no JIT is available for this platform.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/LLVMContext.h"
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#include "llvm/Module.h"
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#include "llvm/Type.h"
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#include "llvm/ADT/Triple.h"
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#include "llvm/Bitcode/ReaderWriter.h"
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#include "llvm/CodeGen/LinkAllCodegenComponents.h"
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#include "llvm/ExecutionEngine/GenericValue.h"
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#include "llvm/ExecutionEngine/Interpreter.h"
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#include "llvm/ExecutionEngine/JIT.h"
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#include "llvm/ExecutionEngine/JITEventListener.h"
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#include "llvm/ExecutionEngine/JITMemoryManager.h"
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#include "llvm/ExecutionEngine/MCJIT.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/IRReader.h"
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#include "llvm/Support/ManagedStatic.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/PluginLoader.h"
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#include "llvm/Support/PrettyStackTrace.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/Support/Process.h"
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#include "llvm/Support/Signals.h"
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#include "llvm/Support/TargetSelect.h"
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#include <cerrno>
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#ifdef __CYGWIN__
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#include <cygwin/version.h>
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#if defined(CYGWIN_VERSION_DLL_MAJOR) && CYGWIN_VERSION_DLL_MAJOR<1007
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#define DO_NOTHING_ATEXIT 1
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#endif
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#endif
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using namespace llvm;
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namespace {
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cl::opt<std::string>
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InputFile(cl::desc("<input bitcode>"), cl::Positional, cl::init("-"));
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cl::list<std::string>
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InputArgv(cl::ConsumeAfter, cl::desc("<program arguments>..."));
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cl::opt<bool> ForceInterpreter("force-interpreter",
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cl::desc("Force interpretation: disable JIT"),
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cl::init(false));
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cl::opt<bool> UseMCJIT(
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"use-mcjit", cl::desc("Enable use of the MC-based JIT (if available)"),
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cl::init(false));
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// Determine optimization level.
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cl::opt<char>
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OptLevel("O",
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cl::desc("Optimization level. [-O0, -O1, -O2, or -O3] "
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"(default = '-O2')"),
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cl::Prefix,
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cl::ZeroOrMore,
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cl::init(' '));
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cl::opt<std::string>
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TargetTriple("mtriple", cl::desc("Override target triple for module"));
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cl::opt<std::string>
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MArch("march",
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cl::desc("Architecture to generate assembly for (see --version)"));
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cl::opt<std::string>
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MCPU("mcpu",
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cl::desc("Target a specific cpu type (-mcpu=help for details)"),
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cl::value_desc("cpu-name"),
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cl::init(""));
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cl::list<std::string>
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MAttrs("mattr",
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cl::CommaSeparated,
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cl::desc("Target specific attributes (-mattr=help for details)"),
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cl::value_desc("a1,+a2,-a3,..."));
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cl::opt<std::string>
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EntryFunc("entry-function",
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cl::desc("Specify the entry function (default = 'main') "
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"of the executable"),
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cl::value_desc("function"),
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cl::init("main"));
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cl::opt<std::string>
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FakeArgv0("fake-argv0",
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cl::desc("Override the 'argv[0]' value passed into the executing"
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" program"), cl::value_desc("executable"));
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cl::opt<bool>
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DisableCoreFiles("disable-core-files", cl::Hidden,
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cl::desc("Disable emission of core files if possible"));
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cl::opt<bool>
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NoLazyCompilation("disable-lazy-compilation",
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cl::desc("Disable JIT lazy compilation"),
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cl::init(false));
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cl::opt<Reloc::Model>
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RelocModel("relocation-model",
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cl::desc("Choose relocation model"),
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cl::init(Reloc::Default),
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cl::values(
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clEnumValN(Reloc::Default, "default",
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"Target default relocation model"),
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clEnumValN(Reloc::Static, "static",
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"Non-relocatable code"),
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clEnumValN(Reloc::PIC_, "pic",
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"Fully relocatable, position independent code"),
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clEnumValN(Reloc::DynamicNoPIC, "dynamic-no-pic",
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"Relocatable external references, non-relocatable code"),
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clEnumValEnd));
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cl::opt<llvm::CodeModel::Model>
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CMModel("code-model",
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cl::desc("Choose code model"),
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cl::init(CodeModel::JITDefault),
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cl::values(clEnumValN(CodeModel::JITDefault, "default",
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"Target default JIT code model"),
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clEnumValN(CodeModel::Small, "small",
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"Small code model"),
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clEnumValN(CodeModel::Kernel, "kernel",
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"Kernel code model"),
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clEnumValN(CodeModel::Medium, "medium",
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"Medium code model"),
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clEnumValN(CodeModel::Large, "large",
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"Large code model"),
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clEnumValEnd));
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}
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static ExecutionEngine *EE = 0;
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static void do_shutdown() {
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// Cygwin-1.5 invokes DLL's dtors before atexit handler.
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#ifndef DO_NOTHING_ATEXIT
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delete EE;
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llvm_shutdown();
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#endif
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}
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//===----------------------------------------------------------------------===//
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// main Driver function
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//
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int main(int argc, char **argv, char * const *envp) {
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sys::PrintStackTraceOnErrorSignal();
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PrettyStackTraceProgram X(argc, argv);
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LLVMContext &Context = getGlobalContext();
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atexit(do_shutdown); // Call llvm_shutdown() on exit.
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// If we have a native target, initialize it to ensure it is linked in and
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// usable by the JIT.
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InitializeNativeTarget();
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InitializeNativeTargetAsmPrinter();
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cl::ParseCommandLineOptions(argc, argv,
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"llvm interpreter & dynamic compiler\n");
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// If the user doesn't want core files, disable them.
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if (DisableCoreFiles)
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sys::Process::PreventCoreFiles();
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// Load the bitcode...
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SMDiagnostic Err;
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Module *Mod = ParseIRFile(InputFile, Err, Context);
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if (!Mod) {
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Err.print(argv[0], errs());
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return 1;
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}
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// If not jitting lazily, load the whole bitcode file eagerly too.
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std::string ErrorMsg;
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if (NoLazyCompilation) {
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if (Mod->MaterializeAllPermanently(&ErrorMsg)) {
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errs() << argv[0] << ": bitcode didn't read correctly.\n";
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errs() << "Reason: " << ErrorMsg << "\n";
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exit(1);
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}
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}
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EngineBuilder builder(Mod);
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builder.setMArch(MArch);
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builder.setMCPU(MCPU);
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builder.setMAttrs(MAttrs);
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builder.setRelocationModel(RelocModel);
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builder.setCodeModel(CMModel);
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builder.setErrorStr(&ErrorMsg);
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builder.setJITMemoryManager(ForceInterpreter ? 0 :
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JITMemoryManager::CreateDefaultMemManager());
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builder.setEngineKind(ForceInterpreter
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? EngineKind::Interpreter
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: EngineKind::JIT);
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// If we are supposed to override the target triple, do so now.
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if (!TargetTriple.empty())
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Mod->setTargetTriple(Triple::normalize(TargetTriple));
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// Enable MCJIT if desired.
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if (UseMCJIT && !ForceInterpreter) {
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builder.setUseMCJIT(true);
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builder.setJITMemoryManager(JITMemoryManager::CreateDefaultMemManager());
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}
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CodeGenOpt::Level OLvl = CodeGenOpt::Default;
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switch (OptLevel) {
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default:
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errs() << argv[0] << ": invalid optimization level.\n";
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return 1;
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case ' ': break;
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case '0': OLvl = CodeGenOpt::None; break;
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case '1': OLvl = CodeGenOpt::Less; break;
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case '2': OLvl = CodeGenOpt::Default; break;
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case '3': OLvl = CodeGenOpt::Aggressive; break;
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}
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builder.setOptLevel(OLvl);
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EE = builder.create();
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if (!EE) {
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if (!ErrorMsg.empty())
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errs() << argv[0] << ": error creating EE: " << ErrorMsg << "\n";
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else
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errs() << argv[0] << ": unknown error creating EE!\n";
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exit(1);
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}
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// The following functions have no effect if their respective profiling
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// support wasn't enabled in the build configuration.
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EE->RegisterJITEventListener(
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JITEventListener::createOProfileJITEventListener());
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EE->RegisterJITEventListener(
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JITEventListener::createIntelJITEventListener());
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EE->DisableLazyCompilation(NoLazyCompilation);
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// If the user specifically requested an argv[0] to pass into the program,
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// do it now.
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if (!FakeArgv0.empty()) {
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InputFile = FakeArgv0;
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} else {
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// Otherwise, if there is a .bc suffix on the executable strip it off, it
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// might confuse the program.
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if (StringRef(InputFile).endswith(".bc"))
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InputFile.erase(InputFile.length() - 3);
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}
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// Add the module's name to the start of the vector of arguments to main().
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InputArgv.insert(InputArgv.begin(), InputFile);
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// Call the main function from M as if its signature were:
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// int main (int argc, char **argv, const char **envp)
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// using the contents of Args to determine argc & argv, and the contents of
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// EnvVars to determine envp.
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//
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Function *EntryFn = Mod->getFunction(EntryFunc);
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if (!EntryFn) {
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errs() << '\'' << EntryFunc << "\' function not found in module.\n";
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return -1;
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}
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// If the program doesn't explicitly call exit, we will need the Exit
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// function later on to make an explicit call, so get the function now.
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Constant *Exit = Mod->getOrInsertFunction("exit", Type::getVoidTy(Context),
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Type::getInt32Ty(Context),
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NULL);
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// Reset errno to zero on entry to main.
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errno = 0;
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// Run static constructors.
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EE->runStaticConstructorsDestructors(false);
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if (NoLazyCompilation) {
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for (Module::iterator I = Mod->begin(), E = Mod->end(); I != E; ++I) {
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Function *Fn = &*I;
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if (Fn != EntryFn && !Fn->isDeclaration())
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EE->getPointerToFunction(Fn);
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}
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}
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// Run main.
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int Result = EE->runFunctionAsMain(EntryFn, InputArgv, envp);
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// Run static destructors.
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EE->runStaticConstructorsDestructors(true);
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// If the program didn't call exit explicitly, we should call it now.
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// This ensures that any atexit handlers get called correctly.
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if (Function *ExitF = dyn_cast<Function>(Exit)) {
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std::vector<GenericValue> Args;
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GenericValue ResultGV;
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ResultGV.IntVal = APInt(32, Result);
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Args.push_back(ResultGV);
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EE->runFunction(ExitF, Args);
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errs() << "ERROR: exit(" << Result << ") returned!\n";
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abort();
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} else {
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errs() << "ERROR: exit defined with wrong prototype!\n";
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abort();
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}
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}
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