mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-11-04 05:17:07 +00:00
75ebbceeed
they hit the rest of the system. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112344 91177308-0d34-0410-b5e6-96231b3b80d8
255 lines
8.1 KiB
C++
255 lines
8.1 KiB
C++
//===- lli.cpp - LLVM Interpreter / Dynamic compiler ----------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This utility provides a simple wrapper around the LLVM Execution Engines,
|
|
// which allow the direct execution of LLVM programs through a Just-In-Time
|
|
// compiler, or through an interpreter if no JIT is available for this platform.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/LLVMContext.h"
|
|
#include "llvm/Module.h"
|
|
#include "llvm/Type.h"
|
|
#include "llvm/ADT/Triple.h"
|
|
#include "llvm/Bitcode/ReaderWriter.h"
|
|
#include "llvm/CodeGen/LinkAllCodegenComponents.h"
|
|
#include "llvm/ExecutionEngine/GenericValue.h"
|
|
#include "llvm/ExecutionEngine/Interpreter.h"
|
|
#include "llvm/ExecutionEngine/JIT.h"
|
|
#include "llvm/ExecutionEngine/JITEventListener.h"
|
|
#include "llvm/Support/CommandLine.h"
|
|
#include "llvm/Support/ManagedStatic.h"
|
|
#include "llvm/Support/MemoryBuffer.h"
|
|
#include "llvm/Support/PluginLoader.h"
|
|
#include "llvm/Support/PrettyStackTrace.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
#include "llvm/System/Process.h"
|
|
#include "llvm/System/Signals.h"
|
|
#include "llvm/Target/TargetSelect.h"
|
|
#include <cerrno>
|
|
using namespace llvm;
|
|
|
|
namespace {
|
|
cl::opt<std::string>
|
|
InputFile(cl::desc("<input bitcode>"), cl::Positional, cl::init("-"));
|
|
|
|
cl::list<std::string>
|
|
InputArgv(cl::ConsumeAfter, cl::desc("<program arguments>..."));
|
|
|
|
cl::opt<bool> ForceInterpreter("force-interpreter",
|
|
cl::desc("Force interpretation: disable JIT"),
|
|
cl::init(false));
|
|
|
|
// Determine optimization level.
|
|
cl::opt<char>
|
|
OptLevel("O",
|
|
cl::desc("Optimization level. [-O0, -O1, -O2, or -O3] "
|
|
"(default = '-O2')"),
|
|
cl::Prefix,
|
|
cl::ZeroOrMore,
|
|
cl::init(' '));
|
|
|
|
cl::opt<std::string>
|
|
TargetTriple("mtriple", cl::desc("Override target triple for module"));
|
|
|
|
cl::opt<std::string>
|
|
MArch("march",
|
|
cl::desc("Architecture to generate assembly for (see --version)"));
|
|
|
|
cl::opt<std::string>
|
|
MCPU("mcpu",
|
|
cl::desc("Target a specific cpu type (-mcpu=help for details)"),
|
|
cl::value_desc("cpu-name"),
|
|
cl::init(""));
|
|
|
|
cl::list<std::string>
|
|
MAttrs("mattr",
|
|
cl::CommaSeparated,
|
|
cl::desc("Target specific attributes (-mattr=help for details)"),
|
|
cl::value_desc("a1,+a2,-a3,..."));
|
|
|
|
cl::opt<std::string>
|
|
EntryFunc("entry-function",
|
|
cl::desc("Specify the entry function (default = 'main') "
|
|
"of the executable"),
|
|
cl::value_desc("function"),
|
|
cl::init("main"));
|
|
|
|
cl::opt<std::string>
|
|
FakeArgv0("fake-argv0",
|
|
cl::desc("Override the 'argv[0]' value passed into the executing"
|
|
" program"), cl::value_desc("executable"));
|
|
|
|
cl::opt<bool>
|
|
DisableCoreFiles("disable-core-files", cl::Hidden,
|
|
cl::desc("Disable emission of core files if possible"));
|
|
|
|
cl::opt<bool>
|
|
NoLazyCompilation("disable-lazy-compilation",
|
|
cl::desc("Disable JIT lazy compilation"),
|
|
cl::init(false));
|
|
}
|
|
|
|
static ExecutionEngine *EE = 0;
|
|
|
|
static void do_shutdown() {
|
|
delete EE;
|
|
llvm_shutdown();
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// main Driver function
|
|
//
|
|
int main(int argc, char **argv, char * const *envp) {
|
|
sys::PrintStackTraceOnErrorSignal();
|
|
PrettyStackTraceProgram X(argc, argv);
|
|
|
|
LLVMContext &Context = getGlobalContext();
|
|
atexit(do_shutdown); // Call llvm_shutdown() on exit.
|
|
|
|
// If we have a native target, initialize it to ensure it is linked in and
|
|
// usable by the JIT.
|
|
InitializeNativeTarget();
|
|
|
|
cl::ParseCommandLineOptions(argc, argv,
|
|
"llvm interpreter & dynamic compiler\n");
|
|
|
|
// If the user doesn't want core files, disable them.
|
|
if (DisableCoreFiles)
|
|
sys::Process::PreventCoreFiles();
|
|
|
|
// Load the bitcode...
|
|
std::string ErrorMsg;
|
|
Module *Mod = NULL;
|
|
if (MemoryBuffer *Buffer = MemoryBuffer::getFileOrSTDIN(InputFile,&ErrorMsg)){
|
|
Mod = getLazyBitcodeModule(Buffer, Context, &ErrorMsg);
|
|
if (!Mod) delete Buffer;
|
|
}
|
|
|
|
if (!Mod) {
|
|
errs() << argv[0] << ": error loading program '" << InputFile << "': "
|
|
<< ErrorMsg << "\n";
|
|
exit(1);
|
|
}
|
|
|
|
// If not jitting lazily, load the whole bitcode file eagerly too.
|
|
if (NoLazyCompilation) {
|
|
if (Mod->MaterializeAllPermanently(&ErrorMsg)) {
|
|
errs() << argv[0] << ": bitcode didn't read correctly.\n";
|
|
errs() << "Reason: " << ErrorMsg << "\n";
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
EngineBuilder builder(Mod);
|
|
builder.setMArch(MArch);
|
|
builder.setMCPU(MCPU);
|
|
builder.setMAttrs(MAttrs);
|
|
builder.setErrorStr(&ErrorMsg);
|
|
builder.setEngineKind(ForceInterpreter
|
|
? EngineKind::Interpreter
|
|
: EngineKind::JIT);
|
|
|
|
// If we are supposed to override the target triple, do so now.
|
|
if (!TargetTriple.empty())
|
|
Mod->setTargetTriple(Triple::normalize(TargetTriple));
|
|
|
|
CodeGenOpt::Level OLvl = CodeGenOpt::Default;
|
|
switch (OptLevel) {
|
|
default:
|
|
errs() << argv[0] << ": invalid optimization level.\n";
|
|
return 1;
|
|
case ' ': break;
|
|
case '0': OLvl = CodeGenOpt::None; break;
|
|
case '1': OLvl = CodeGenOpt::Less; break;
|
|
case '2': OLvl = CodeGenOpt::Default; break;
|
|
case '3': OLvl = CodeGenOpt::Aggressive; break;
|
|
}
|
|
builder.setOptLevel(OLvl);
|
|
|
|
EE = builder.create();
|
|
if (!EE) {
|
|
if (!ErrorMsg.empty())
|
|
errs() << argv[0] << ": error creating EE: " << ErrorMsg << "\n";
|
|
else
|
|
errs() << argv[0] << ": unknown error creating EE!\n";
|
|
exit(1);
|
|
}
|
|
|
|
EE->RegisterJITEventListener(createOProfileJITEventListener());
|
|
|
|
EE->DisableLazyCompilation(NoLazyCompilation);
|
|
|
|
// If the user specifically requested an argv[0] to pass into the program,
|
|
// do it now.
|
|
if (!FakeArgv0.empty()) {
|
|
InputFile = FakeArgv0;
|
|
} else {
|
|
// Otherwise, if there is a .bc suffix on the executable strip it off, it
|
|
// might confuse the program.
|
|
if (StringRef(InputFile).endswith(".bc"))
|
|
InputFile.erase(InputFile.length() - 3);
|
|
}
|
|
|
|
// Add the module's name to the start of the vector of arguments to main().
|
|
InputArgv.insert(InputArgv.begin(), InputFile);
|
|
|
|
// Call the main function from M as if its signature were:
|
|
// int main (int argc, char **argv, const char **envp)
|
|
// using the contents of Args to determine argc & argv, and the contents of
|
|
// EnvVars to determine envp.
|
|
//
|
|
Function *EntryFn = Mod->getFunction(EntryFunc);
|
|
if (!EntryFn) {
|
|
errs() << '\'' << EntryFunc << "\' function not found in module.\n";
|
|
return -1;
|
|
}
|
|
|
|
// If the program doesn't explicitly call exit, we will need the Exit
|
|
// function later on to make an explicit call, so get the function now.
|
|
Constant *Exit = Mod->getOrInsertFunction("exit", Type::getVoidTy(Context),
|
|
Type::getInt32Ty(Context),
|
|
NULL);
|
|
|
|
// Reset errno to zero on entry to main.
|
|
errno = 0;
|
|
|
|
// Run static constructors.
|
|
EE->runStaticConstructorsDestructors(false);
|
|
|
|
if (NoLazyCompilation) {
|
|
for (Module::iterator I = Mod->begin(), E = Mod->end(); I != E; ++I) {
|
|
Function *Fn = &*I;
|
|
if (Fn != EntryFn && !Fn->isDeclaration())
|
|
EE->getPointerToFunction(Fn);
|
|
}
|
|
}
|
|
|
|
// Run main.
|
|
int Result = EE->runFunctionAsMain(EntryFn, InputArgv, envp);
|
|
|
|
// Run static destructors.
|
|
EE->runStaticConstructorsDestructors(true);
|
|
|
|
// If the program didn't call exit explicitly, we should call it now.
|
|
// This ensures that any atexit handlers get called correctly.
|
|
if (Function *ExitF = dyn_cast<Function>(Exit)) {
|
|
std::vector<GenericValue> Args;
|
|
GenericValue ResultGV;
|
|
ResultGV.IntVal = APInt(32, Result);
|
|
Args.push_back(ResultGV);
|
|
EE->runFunction(ExitF, Args);
|
|
errs() << "ERROR: exit(" << Result << ") returned!\n";
|
|
abort();
|
|
} else {
|
|
errs() << "ERROR: exit defined with wrong prototype!\n";
|
|
abort();
|
|
}
|
|
}
|