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https://github.com/c64scene-ar/llvm-6502.git
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deca08d93d
Target DataLayout incorrectly. For now, we'll trust that the module has got the correct DataLayout. In the future, this needs to be changed to tell the TargetData to be "current host". git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34947 91177308-0d34-0410-b5e6-96231b3b80d8
107 lines
3.4 KiB
C++
107 lines
3.4 KiB
C++
//===- Interpreter.cpp - Top-Level LLVM Interpreter Implementation --------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the top-level functionality for the LLVM interpreter.
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// This interpreter is designed to be a very simple, portable, inefficient
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// interpreter.
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//
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//===----------------------------------------------------------------------===//
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#include "Interpreter.h"
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#include "llvm/CodeGen/IntrinsicLowering.h"
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#include "llvm/DerivedTypes.h"
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#include "llvm/Module.h"
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#include "llvm/ModuleProvider.h"
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using namespace llvm;
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static struct RegisterInterp {
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RegisterInterp() { Interpreter::Register(); }
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} InterpRegistrator;
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namespace llvm {
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void LinkInInterpreter() {
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}
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}
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/// create - Create a new interpreter object. This can never fail.
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///
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ExecutionEngine *Interpreter::create(ModuleProvider *MP, std::string* ErrStr) {
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// Tell this ModuleProvide to materialize and release the module
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Module *M = MP->releaseModule(ErrStr);
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if (!M)
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// We got an error, just return 0
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return 0;
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// This is a bit nasty, but the ExecutionEngine won't be able to delete the
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// module due to use/def issues if we don't delete this MP here. Below we
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// construct a new Interpreter with the Module we just got. This creates a
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// new ExistingModuleProvider in the EE instance. Consequently, MP is left
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// dangling and it contains references into the module which cause problems
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// when the module is deleted via the ExistingModuleProvide via EE.
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delete MP;
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return new Interpreter(M);
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}
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//===----------------------------------------------------------------------===//
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// Interpreter ctor - Initialize stuff
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//
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Interpreter::Interpreter(Module *M) : ExecutionEngine(M), TD(M) {
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memset(&ExitValue, 0, sizeof(ExitValue));
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setTargetData(&TD);
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// Initialize the "backend"
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initializeExecutionEngine();
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initializeExternalFunctions();
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emitGlobals();
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IL = new IntrinsicLowering(TD);
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}
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Interpreter::~Interpreter() {
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delete IL;
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}
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void Interpreter::runAtExitHandlers () {
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while (!AtExitHandlers.empty()) {
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callFunction(AtExitHandlers.back(), std::vector<GenericValue>());
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AtExitHandlers.pop_back();
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run();
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}
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}
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/// run - Start execution with the specified function and arguments.
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///
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GenericValue
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Interpreter::runFunction(Function *F,
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const std::vector<GenericValue> &ArgValues) {
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assert (F && "Function *F was null at entry to run()");
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// Try extra hard not to pass extra args to a function that isn't
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// expecting them. C programmers frequently bend the rules and
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// declare main() with fewer parameters than it actually gets
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// passed, and the interpreter barfs if you pass a function more
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// parameters than it is declared to take. This does not attempt to
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// take into account gratuitous differences in declared types,
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// though.
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std::vector<GenericValue> ActualArgs;
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const unsigned ArgCount = F->getFunctionType()->getNumParams();
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for (unsigned i = 0; i < ArgCount; ++i)
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ActualArgs.push_back(ArgValues[i]);
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// Set up the function call.
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callFunction(F, ActualArgs);
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// Start executing the function.
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run();
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return ExitValue;
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}
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