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Imported Upstream version 5.18.0.234
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# Make sure that the path to libffi headers is on the command
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# line. That path can be a compiler's non-default path even when
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# FFI_INCLUDE_DIR was not used, because cmake has its own paths for
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# searching for headers (CMAKE_SYSTEM_INCLUDE_PATH, for instance):
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if( FFI_INCLUDE_PATH )
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include_directories( ${FFI_INCLUDE_PATH} )
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endif()
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add_llvm_library(LLVMInterpreter
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Execution.cpp
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ExternalFunctions.cpp
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Interpreter.cpp
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DEPENDS
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intrinsics_gen
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)
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if( LLVM_ENABLE_FFI )
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target_link_libraries( LLVMInterpreter PRIVATE ${FFI_LIBRARY_PATH} )
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endif()
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File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
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//===- 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 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 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/IR/DerivedTypes.h"
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#include "llvm/IR/Module.h"
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#include <cstring>
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using namespace llvm;
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namespace {
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static struct RegisterInterp {
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RegisterInterp() { Interpreter::Register(); }
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} InterpRegistrator;
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}
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extern "C" void LLVMLinkInInterpreter() { }
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/// Create a new interpreter object.
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///
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ExecutionEngine *Interpreter::create(std::unique_ptr<Module> M,
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std::string *ErrStr) {
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// Tell this Module to materialize everything and release the GVMaterializer.
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if (Error Err = M->materializeAll()) {
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std::string Msg;
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handleAllErrors(std::move(Err), [&](ErrorInfoBase &EIB) {
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Msg = EIB.message();
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});
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if (ErrStr)
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*ErrStr = Msg;
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// We got an error, just return 0
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return nullptr;
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}
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return new Interpreter(std::move(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(std::unique_ptr<Module> M)
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: ExecutionEngine(std::move(M)) {
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memset(&ExitValue.Untyped, 0, sizeof(ExitValue.Untyped));
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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(getDataLayout());
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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(), None);
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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 Interpreter::runFunction(Function *F,
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ArrayRef<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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const size_t ArgCount = F->getFunctionType()->getNumParams();
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ArrayRef<GenericValue> ActualArgs =
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ArgValues.slice(0, std::min(ArgValues.size(), ArgCount));
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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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@ -1,235 +0,0 @@
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//===-- Interpreter.h ------------------------------------------*- C++ -*--===//
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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 header file defines the interpreter structure
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_EXECUTIONENGINE_INTERPRETER_INTERPRETER_H
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#define LLVM_LIB_EXECUTIONENGINE_INTERPRETER_INTERPRETER_H
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#include "llvm/ExecutionEngine/ExecutionEngine.h"
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#include "llvm/ExecutionEngine/GenericValue.h"
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#include "llvm/IR/CallSite.h"
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#include "llvm/IR/DataLayout.h"
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#include "llvm/IR/Function.h"
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#include "llvm/IR/InstVisitor.h"
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#include "llvm/Support/DataTypes.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/raw_ostream.h"
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namespace llvm {
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class IntrinsicLowering;
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template<typename T> class generic_gep_type_iterator;
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class ConstantExpr;
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typedef generic_gep_type_iterator<User::const_op_iterator> gep_type_iterator;
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// AllocaHolder - Object to track all of the blocks of memory allocated by
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// alloca. When the function returns, this object is popped off the execution
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// stack, which causes the dtor to be run, which frees all the alloca'd memory.
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//
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class AllocaHolder {
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std::vector<void *> Allocations;
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public:
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AllocaHolder() {}
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// Make this type move-only.
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AllocaHolder(AllocaHolder &&) = default;
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AllocaHolder &operator=(AllocaHolder &&RHS) = default;
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~AllocaHolder() {
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for (void *Allocation : Allocations)
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free(Allocation);
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}
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void add(void *Mem) { Allocations.push_back(Mem); }
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};
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typedef std::vector<GenericValue> ValuePlaneTy;
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// ExecutionContext struct - This struct represents one stack frame currently
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// executing.
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//
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struct ExecutionContext {
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Function *CurFunction;// The currently executing function
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BasicBlock *CurBB; // The currently executing BB
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BasicBlock::iterator CurInst; // The next instruction to execute
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CallSite Caller; // Holds the call that called subframes.
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// NULL if main func or debugger invoked fn
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std::map<Value *, GenericValue> Values; // LLVM values used in this invocation
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std::vector<GenericValue> VarArgs; // Values passed through an ellipsis
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AllocaHolder Allocas; // Track memory allocated by alloca
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ExecutionContext() : CurFunction(nullptr), CurBB(nullptr), CurInst(nullptr) {}
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};
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// Interpreter - This class represents the entirety of the interpreter.
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//
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class Interpreter : public ExecutionEngine, public InstVisitor<Interpreter> {
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GenericValue ExitValue; // The return value of the called function
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IntrinsicLowering *IL;
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// The runtime stack of executing code. The top of the stack is the current
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// function record.
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std::vector<ExecutionContext> ECStack;
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// AtExitHandlers - List of functions to call when the program exits,
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// registered with the atexit() library function.
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std::vector<Function*> AtExitHandlers;
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public:
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explicit Interpreter(std::unique_ptr<Module> M);
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~Interpreter() override;
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/// runAtExitHandlers - Run any functions registered by the program's calls to
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/// atexit(3), which we intercept and store in AtExitHandlers.
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///
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void runAtExitHandlers();
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static void Register() {
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InterpCtor = create;
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}
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/// Create an interpreter ExecutionEngine.
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///
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static ExecutionEngine *create(std::unique_ptr<Module> M,
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std::string *ErrorStr = nullptr);
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/// run - Start execution with the specified function and arguments.
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///
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GenericValue runFunction(Function *F,
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ArrayRef<GenericValue> ArgValues) override;
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void *getPointerToNamedFunction(StringRef Name,
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bool AbortOnFailure = true) override {
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// FIXME: not implemented.
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return nullptr;
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}
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// Methods used to execute code:
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// Place a call on the stack
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void callFunction(Function *F, ArrayRef<GenericValue> ArgVals);
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void run(); // Execute instructions until nothing left to do
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// Opcode Implementations
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void visitReturnInst(ReturnInst &I);
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void visitBranchInst(BranchInst &I);
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void visitSwitchInst(SwitchInst &I);
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void visitIndirectBrInst(IndirectBrInst &I);
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void visitBinaryOperator(BinaryOperator &I);
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void visitICmpInst(ICmpInst &I);
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void visitFCmpInst(FCmpInst &I);
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void visitAllocaInst(AllocaInst &I);
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void visitLoadInst(LoadInst &I);
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void visitStoreInst(StoreInst &I);
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void visitGetElementPtrInst(GetElementPtrInst &I);
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void visitPHINode(PHINode &PN) {
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llvm_unreachable("PHI nodes already handled!");
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}
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void visitTruncInst(TruncInst &I);
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void visitZExtInst(ZExtInst &I);
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void visitSExtInst(SExtInst &I);
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void visitFPTruncInst(FPTruncInst &I);
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void visitFPExtInst(FPExtInst &I);
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void visitUIToFPInst(UIToFPInst &I);
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void visitSIToFPInst(SIToFPInst &I);
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void visitFPToUIInst(FPToUIInst &I);
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void visitFPToSIInst(FPToSIInst &I);
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void visitPtrToIntInst(PtrToIntInst &I);
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void visitIntToPtrInst(IntToPtrInst &I);
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void visitBitCastInst(BitCastInst &I);
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void visitSelectInst(SelectInst &I);
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void visitCallSite(CallSite CS);
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void visitCallInst(CallInst &I) { visitCallSite (CallSite (&I)); }
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void visitInvokeInst(InvokeInst &I) { visitCallSite (CallSite (&I)); }
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void visitUnreachableInst(UnreachableInst &I);
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void visitShl(BinaryOperator &I);
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void visitLShr(BinaryOperator &I);
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void visitAShr(BinaryOperator &I);
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void visitVAArgInst(VAArgInst &I);
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void visitExtractElementInst(ExtractElementInst &I);
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void visitInsertElementInst(InsertElementInst &I);
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void visitShuffleVectorInst(ShuffleVectorInst &I);
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void visitExtractValueInst(ExtractValueInst &I);
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void visitInsertValueInst(InsertValueInst &I);
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void visitInstruction(Instruction &I) {
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errs() << I << "\n";
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llvm_unreachable("Instruction not interpretable yet!");
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}
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GenericValue callExternalFunction(Function *F,
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ArrayRef<GenericValue> ArgVals);
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void exitCalled(GenericValue GV);
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void addAtExitHandler(Function *F) {
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AtExitHandlers.push_back(F);
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}
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GenericValue *getFirstVarArg () {
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return &(ECStack.back ().VarArgs[0]);
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}
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private: // Helper functions
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GenericValue executeGEPOperation(Value *Ptr, gep_type_iterator I,
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gep_type_iterator E, ExecutionContext &SF);
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// SwitchToNewBasicBlock - Start execution in a new basic block and run any
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// PHI nodes in the top of the block. This is used for intraprocedural
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// control flow.
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//
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void SwitchToNewBasicBlock(BasicBlock *Dest, ExecutionContext &SF);
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void *getPointerToFunction(Function *F) override { return (void*)F; }
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void initializeExecutionEngine() { }
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void initializeExternalFunctions();
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GenericValue getConstantExprValue(ConstantExpr *CE, ExecutionContext &SF);
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GenericValue getOperandValue(Value *V, ExecutionContext &SF);
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GenericValue executeTruncInst(Value *SrcVal, Type *DstTy,
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ExecutionContext &SF);
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GenericValue executeSExtInst(Value *SrcVal, Type *DstTy,
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ExecutionContext &SF);
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GenericValue executeZExtInst(Value *SrcVal, Type *DstTy,
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ExecutionContext &SF);
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GenericValue executeFPTruncInst(Value *SrcVal, Type *DstTy,
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ExecutionContext &SF);
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GenericValue executeFPExtInst(Value *SrcVal, Type *DstTy,
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ExecutionContext &SF);
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GenericValue executeFPToUIInst(Value *SrcVal, Type *DstTy,
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ExecutionContext &SF);
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GenericValue executeFPToSIInst(Value *SrcVal, Type *DstTy,
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ExecutionContext &SF);
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GenericValue executeUIToFPInst(Value *SrcVal, Type *DstTy,
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ExecutionContext &SF);
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GenericValue executeSIToFPInst(Value *SrcVal, Type *DstTy,
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ExecutionContext &SF);
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GenericValue executePtrToIntInst(Value *SrcVal, Type *DstTy,
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ExecutionContext &SF);
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GenericValue executeIntToPtrInst(Value *SrcVal, Type *DstTy,
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ExecutionContext &SF);
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GenericValue executeBitCastInst(Value *SrcVal, Type *DstTy,
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ExecutionContext &SF);
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GenericValue executeCastOperation(Instruction::CastOps opcode, Value *SrcVal,
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Type *Ty, ExecutionContext &SF);
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void popStackAndReturnValueToCaller(Type *RetTy, GenericValue Result);
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};
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} // End llvm namespace
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#endif
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@ -1,22 +0,0 @@
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;===- ./lib/ExecutionEngine/Interpreter/LLVMBuild.txt ----------*- Conf -*--===;
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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 is an LLVMBuild description file for the components in this subdirectory.
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;
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; For more information on the LLVMBuild system, please see:
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;
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; http://llvm.org/docs/LLVMBuild.html
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;
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;===------------------------------------------------------------------------===;
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[component_0]
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type = Library
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name = Interpreter
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parent = ExecutionEngine
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required_libraries = CodeGen Core ExecutionEngine Support
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Reference in New Issue
Block a user