//===- 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/Module.h"
-#include "llvm/DerivedTypes.h"
-#include "llvm/Function.h"
+#include "llvm/CodeGen/IntrinsicLowering.h"
+#include "llvm/IR/DerivedTypes.h"
+#include "llvm/IR/Module.h"
+#include <cstring>
+using namespace llvm;
-/// create - Create a new interpreter object. This can never fail.
-///
-ExecutionEngine *Interpreter::create(Module *M, bool TraceMode){
- bool isLittleEndian = false;
- switch (M->getEndianness()) {
- case Module::LittleEndian: isLittleEndian = true; break;
- case Module::BigEndian: isLittleEndian = false; break;
- case Module::AnyPointerSize:
- int Test = 0;
- *(char*)&Test = 1; // Return true if the host is little endian
- isLittleEndian = (Test == 1);
- break;
- }
+namespace {
+
+static struct RegisterInterp {
+ RegisterInterp() { Interpreter::Register(); }
+} InterpRegistrator;
+
+}
- bool isLongPointer = false;
- switch (M->getPointerSize()) {
- case Module::Pointer32: isLongPointer = false; break;
- case Module::Pointer64: isLongPointer = true; break;
- case Module::AnyPointerSize:
- isLongPointer = (sizeof(void*) == 8); // Follow host
- break;
+extern "C" void LLVMLinkInInterpreter() { }
+
+/// Create a new interpreter object.
+///
+ExecutionEngine *Interpreter::create(std::unique_ptr<Module> M,
+ std::string *ErrStr) {
+ // Tell this Module to materialize everything and release the GVMaterializer.
+ if (std::error_code EC = M->materializeAllPermanently()) {
+ if (ErrStr)
+ *ErrStr = EC.message();
+ // We got an error, just return 0
+ return nullptr;
}
- return new Interpreter(M, isLittleEndian, isLongPointer, TraceMode);
+ return new Interpreter(std::move(M));
}
//===----------------------------------------------------------------------===//
// Interpreter ctor - Initialize stuff
//
-Interpreter::Interpreter(Module *M, bool isLittleEndian, bool isLongPointer,
- bool TraceMode)
- : ExecutionEngine(M), ExitCode(0), Trace(TraceMode),
- CurFrame(-1), TD("lli", isLittleEndian, isLongPointer ? 8 : 4,
- isLongPointer ? 8 : 4, isLongPointer ? 8 : 4) {
+Interpreter::Interpreter(std::unique_ptr<Module> M)
+ : ExecutionEngine(std::move(M)) {
- setTargetData(TD);
+ memset(&ExitValue.Untyped, 0, sizeof(ExitValue.Untyped));
// Initialize the "backend"
initializeExecutionEngine();
initializeExternalFunctions();
- CW.setModule(M); // Update Writer
emitGlobals();
+
+ IL = new IntrinsicLowering(getDataLayout());
+}
+
+Interpreter::~Interpreter() {
+ delete IL;
}
void Interpreter::runAtExitHandlers () {
while (!AtExitHandlers.empty()) {
- callFunction(AtExitHandlers.back(), std::vector<GenericValue>());
+ callFunction(AtExitHandlers.back(), None);
AtExitHandlers.pop_back();
run();
}
/// run - Start execution with the specified function and arguments.
///
-GenericValue Interpreter::run(Function *F,
- const std::vector<GenericValue> &ArgValues) {
+GenericValue Interpreter::runFunction(Function *F,
+ ArrayRef<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
// 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()->getParamTypes().size();
- for (unsigned i = 0; i < ArgCount; ++i) {
- ActualArgs.push_back (ArgValues[i]);
- }
-
+ const size_t ArgCount = F->getFunctionType()->getNumParams();
+ ArrayRef<GenericValue> ActualArgs =
+ ArgValues.slice(0, std::min(ArgValues.size(), ArgCount));
+
// Set up the function call.
callFunction(F, ActualArgs);
- // Reset the current frame location to the top of stack
- CurFrame = ECStack.size()-1;
-
// Start executing the function.
run();
-
- // Run any atexit handlers now!
- runAtExitHandlers();
- GenericValue rv;
- rv.IntVal = ExitCode;
- return rv;
+ return ExitValue;
}