mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-01 02:29:19 +00:00
f0356fe140
Modules and ModuleProviders. Because the "ModuleProvider" simply materializes GlobalValues now, and doesn't provide modules, it's renamed to "GVMaterializer". Code that used to need a ModuleProvider to materialize Functions can now materialize the Functions directly. Functions no longer use a magic linkage to record that they're materializable; they simply ask the GVMaterializer. Because the C ABI must never change, we can't remove LLVMModuleProviderRef or the functions that refer to it. Instead, because Module now exposes the same functionality ModuleProvider used to, we store a Module* in any LLVMModuleProviderRef and translate in the wrapper methods. The bindings to other languages still use the ModuleProvider concept. It would probably be worth some time to update them to follow the C++ more closely, but I don't intend to do it. Fixes http://llvm.org/PR5737 and http://llvm.org/PR5735. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94686 91177308-0d34-0410-b5e6-96231b3b80d8
99 lines
2.9 KiB
C++
99 lines
2.9 KiB
C++
//===- Interpreter.cpp - Top-Level LLVM Interpreter Implementation --------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file implements the top-level functionality for the LLVM interpreter.
|
|
// This interpreter is designed to be a very simple, portable, inefficient
|
|
// interpreter.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "Interpreter.h"
|
|
#include "llvm/CodeGen/IntrinsicLowering.h"
|
|
#include "llvm/DerivedTypes.h"
|
|
#include "llvm/Module.h"
|
|
#include <cstring>
|
|
using namespace llvm;
|
|
|
|
namespace {
|
|
|
|
static struct RegisterInterp {
|
|
RegisterInterp() { Interpreter::Register(); }
|
|
} InterpRegistrator;
|
|
|
|
}
|
|
|
|
extern "C" void LLVMLinkInInterpreter() { }
|
|
|
|
/// create - Create a new interpreter object. This can never fail.
|
|
///
|
|
ExecutionEngine *Interpreter::create(Module *M, std::string* ErrStr) {
|
|
// Tell this Module to materialize everything and release the GVMaterializer.
|
|
if (M->MaterializeAllPermanently(ErrStr))
|
|
// We got an error, just return 0
|
|
return 0;
|
|
|
|
return new Interpreter(M);
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Interpreter ctor - Initialize stuff
|
|
//
|
|
Interpreter::Interpreter(Module *M)
|
|
: ExecutionEngine(M), TD(M) {
|
|
|
|
memset(&ExitValue.Untyped, 0, sizeof(ExitValue.Untyped));
|
|
setTargetData(&TD);
|
|
// Initialize the "backend"
|
|
initializeExecutionEngine();
|
|
initializeExternalFunctions();
|
|
emitGlobals();
|
|
|
|
IL = new IntrinsicLowering(TD);
|
|
}
|
|
|
|
Interpreter::~Interpreter() {
|
|
delete IL;
|
|
}
|
|
|
|
void Interpreter::runAtExitHandlers () {
|
|
while (!AtExitHandlers.empty()) {
|
|
callFunction(AtExitHandlers.back(), std::vector<GenericValue>());
|
|
AtExitHandlers.pop_back();
|
|
run();
|
|
}
|
|
}
|
|
|
|
/// run - Start execution with the specified function and arguments.
|
|
///
|
|
GenericValue
|
|
Interpreter::runFunction(Function *F,
|
|
const std::vector<GenericValue> &ArgValues) {
|
|
assert (F && "Function *F was null at entry to run()");
|
|
|
|
// Try extra hard not to pass extra args to a function that isn't
|
|
// expecting them. C programmers frequently bend the rules and
|
|
// declare main() with fewer parameters than it actually gets
|
|
// passed, and the interpreter barfs if you pass a function more
|
|
// parameters than it is declared to take. This does not attempt to
|
|
// take into account gratuitous differences in declared types,
|
|
// though.
|
|
std::vector<GenericValue> ActualArgs;
|
|
const unsigned ArgCount = F->getFunctionType()->getNumParams();
|
|
for (unsigned i = 0; i < ArgCount; ++i)
|
|
ActualArgs.push_back(ArgValues[i]);
|
|
|
|
// Set up the function call.
|
|
callFunction(F, ActualArgs);
|
|
|
|
// Start executing the function.
|
|
run();
|
|
|
|
return ExitValue;
|
|
}
|