mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-13 06:06:27 +00:00
aa5abe88d6
remove the code that handles them. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149901 91177308-0d34-0410-b5e6-96231b3b80d8
248 lines
8.9 KiB
C++
248 lines
8.9 KiB
C++
//===-- Interpreter.h ------------------------------------------*- C++ -*--===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This header file defines the interpreter structure
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLI_INTERPRETER_H
|
|
#define LLI_INTERPRETER_H
|
|
|
|
#include "llvm/Function.h"
|
|
#include "llvm/ExecutionEngine/ExecutionEngine.h"
|
|
#include "llvm/ExecutionEngine/GenericValue.h"
|
|
#include "llvm/Target/TargetData.h"
|
|
#include "llvm/Support/CallSite.h"
|
|
#include "llvm/Support/DataTypes.h"
|
|
#include "llvm/Support/ErrorHandling.h"
|
|
#include "llvm/Support/InstVisitor.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
namespace llvm {
|
|
|
|
class IntrinsicLowering;
|
|
struct FunctionInfo;
|
|
template<typename T> class generic_gep_type_iterator;
|
|
class ConstantExpr;
|
|
typedef generic_gep_type_iterator<User::const_op_iterator> gep_type_iterator;
|
|
|
|
|
|
// AllocaHolder - Object to track all of the blocks of memory allocated by
|
|
// alloca. When the function returns, this object is popped off the execution
|
|
// stack, which causes the dtor to be run, which frees all the alloca'd memory.
|
|
//
|
|
class AllocaHolder {
|
|
friend class AllocaHolderHandle;
|
|
std::vector<void*> Allocations;
|
|
unsigned RefCnt;
|
|
public:
|
|
AllocaHolder() : RefCnt(0) {}
|
|
void add(void *mem) { Allocations.push_back(mem); }
|
|
~AllocaHolder() {
|
|
for (unsigned i = 0; i < Allocations.size(); ++i)
|
|
free(Allocations[i]);
|
|
}
|
|
};
|
|
|
|
// AllocaHolderHandle gives AllocaHolder value semantics so we can stick it into
|
|
// a vector...
|
|
//
|
|
class AllocaHolderHandle {
|
|
AllocaHolder *H;
|
|
public:
|
|
AllocaHolderHandle() : H(new AllocaHolder()) { H->RefCnt++; }
|
|
AllocaHolderHandle(const AllocaHolderHandle &AH) : H(AH.H) { H->RefCnt++; }
|
|
~AllocaHolderHandle() { if (--H->RefCnt == 0) delete H; }
|
|
|
|
void add(void *mem) { H->add(mem); }
|
|
};
|
|
|
|
typedef std::vector<GenericValue> ValuePlaneTy;
|
|
|
|
// ExecutionContext struct - This struct represents one stack frame currently
|
|
// executing.
|
|
//
|
|
struct ExecutionContext {
|
|
Function *CurFunction;// The currently executing function
|
|
BasicBlock *CurBB; // The currently executing BB
|
|
BasicBlock::iterator CurInst; // The next instruction to execute
|
|
std::map<Value *, GenericValue> Values; // LLVM values used in this invocation
|
|
std::vector<GenericValue> VarArgs; // Values passed through an ellipsis
|
|
CallSite Caller; // Holds the call that called subframes.
|
|
// NULL if main func or debugger invoked fn
|
|
AllocaHolderHandle Allocas; // Track memory allocated by alloca
|
|
};
|
|
|
|
// Interpreter - This class represents the entirety of the interpreter.
|
|
//
|
|
class Interpreter : public ExecutionEngine, public InstVisitor<Interpreter> {
|
|
GenericValue ExitValue; // The return value of the called function
|
|
TargetData TD;
|
|
IntrinsicLowering *IL;
|
|
|
|
// The runtime stack of executing code. The top of the stack is the current
|
|
// function record.
|
|
std::vector<ExecutionContext> ECStack;
|
|
|
|
// AtExitHandlers - List of functions to call when the program exits,
|
|
// registered with the atexit() library function.
|
|
std::vector<Function*> AtExitHandlers;
|
|
|
|
public:
|
|
explicit Interpreter(Module *M);
|
|
~Interpreter();
|
|
|
|
/// runAtExitHandlers - Run any functions registered by the program's calls to
|
|
/// atexit(3), which we intercept and store in AtExitHandlers.
|
|
///
|
|
void runAtExitHandlers();
|
|
|
|
static void Register() {
|
|
InterpCtor = create;
|
|
}
|
|
|
|
/// create - Create an interpreter ExecutionEngine. This can never fail.
|
|
///
|
|
static ExecutionEngine *create(Module *M, std::string *ErrorStr = 0);
|
|
|
|
/// run - Start execution with the specified function and arguments.
|
|
///
|
|
virtual GenericValue runFunction(Function *F,
|
|
const std::vector<GenericValue> &ArgValues);
|
|
|
|
virtual void *getPointerToNamedFunction(const std::string &Name,
|
|
bool AbortOnFailure = true) {
|
|
// FIXME: not implemented.
|
|
return 0;
|
|
}
|
|
|
|
/// recompileAndRelinkFunction - For the interpreter, functions are always
|
|
/// up-to-date.
|
|
///
|
|
virtual void *recompileAndRelinkFunction(Function *F) {
|
|
return getPointerToFunction(F);
|
|
}
|
|
|
|
/// freeMachineCodeForFunction - The interpreter does not generate any code.
|
|
///
|
|
void freeMachineCodeForFunction(Function *F) { }
|
|
|
|
// Methods used to execute code:
|
|
// Place a call on the stack
|
|
void callFunction(Function *F, const std::vector<GenericValue> &ArgVals);
|
|
void run(); // Execute instructions until nothing left to do
|
|
|
|
// Opcode Implementations
|
|
void visitReturnInst(ReturnInst &I);
|
|
void visitBranchInst(BranchInst &I);
|
|
void visitSwitchInst(SwitchInst &I);
|
|
void visitIndirectBrInst(IndirectBrInst &I);
|
|
|
|
void visitBinaryOperator(BinaryOperator &I);
|
|
void visitICmpInst(ICmpInst &I);
|
|
void visitFCmpInst(FCmpInst &I);
|
|
void visitAllocaInst(AllocaInst &I);
|
|
void visitLoadInst(LoadInst &I);
|
|
void visitStoreInst(StoreInst &I);
|
|
void visitGetElementPtrInst(GetElementPtrInst &I);
|
|
void visitPHINode(PHINode &PN) {
|
|
llvm_unreachable("PHI nodes already handled!");
|
|
}
|
|
void visitTruncInst(TruncInst &I);
|
|
void visitZExtInst(ZExtInst &I);
|
|
void visitSExtInst(SExtInst &I);
|
|
void visitFPTruncInst(FPTruncInst &I);
|
|
void visitFPExtInst(FPExtInst &I);
|
|
void visitUIToFPInst(UIToFPInst &I);
|
|
void visitSIToFPInst(SIToFPInst &I);
|
|
void visitFPToUIInst(FPToUIInst &I);
|
|
void visitFPToSIInst(FPToSIInst &I);
|
|
void visitPtrToIntInst(PtrToIntInst &I);
|
|
void visitIntToPtrInst(IntToPtrInst &I);
|
|
void visitBitCastInst(BitCastInst &I);
|
|
void visitSelectInst(SelectInst &I);
|
|
|
|
|
|
void visitCallSite(CallSite CS);
|
|
void visitCallInst(CallInst &I) { visitCallSite (CallSite (&I)); }
|
|
void visitInvokeInst(InvokeInst &I) { visitCallSite (CallSite (&I)); }
|
|
void visitUnreachableInst(UnreachableInst &I);
|
|
|
|
void visitShl(BinaryOperator &I);
|
|
void visitLShr(BinaryOperator &I);
|
|
void visitAShr(BinaryOperator &I);
|
|
|
|
void visitVAArgInst(VAArgInst &I);
|
|
void visitInstruction(Instruction &I) {
|
|
errs() << I << "\n";
|
|
llvm_unreachable("Instruction not interpretable yet!");
|
|
}
|
|
|
|
GenericValue callExternalFunction(Function *F,
|
|
const std::vector<GenericValue> &ArgVals);
|
|
void exitCalled(GenericValue GV);
|
|
|
|
void addAtExitHandler(Function *F) {
|
|
AtExitHandlers.push_back(F);
|
|
}
|
|
|
|
GenericValue *getFirstVarArg () {
|
|
return &(ECStack.back ().VarArgs[0]);
|
|
}
|
|
|
|
private: // Helper functions
|
|
GenericValue executeGEPOperation(Value *Ptr, gep_type_iterator I,
|
|
gep_type_iterator E, ExecutionContext &SF);
|
|
|
|
// SwitchToNewBasicBlock - Start execution in a new basic block and run any
|
|
// PHI nodes in the top of the block. This is used for intraprocedural
|
|
// control flow.
|
|
//
|
|
void SwitchToNewBasicBlock(BasicBlock *Dest, ExecutionContext &SF);
|
|
|
|
void *getPointerToFunction(Function *F) { return (void*)F; }
|
|
void *getPointerToBasicBlock(BasicBlock *BB) { return (void*)BB; }
|
|
|
|
void initializeExecutionEngine() { }
|
|
void initializeExternalFunctions();
|
|
GenericValue getConstantExprValue(ConstantExpr *CE, ExecutionContext &SF);
|
|
GenericValue getOperandValue(Value *V, ExecutionContext &SF);
|
|
GenericValue executeTruncInst(Value *SrcVal, Type *DstTy,
|
|
ExecutionContext &SF);
|
|
GenericValue executeSExtInst(Value *SrcVal, Type *DstTy,
|
|
ExecutionContext &SF);
|
|
GenericValue executeZExtInst(Value *SrcVal, Type *DstTy,
|
|
ExecutionContext &SF);
|
|
GenericValue executeFPTruncInst(Value *SrcVal, Type *DstTy,
|
|
ExecutionContext &SF);
|
|
GenericValue executeFPExtInst(Value *SrcVal, Type *DstTy,
|
|
ExecutionContext &SF);
|
|
GenericValue executeFPToUIInst(Value *SrcVal, Type *DstTy,
|
|
ExecutionContext &SF);
|
|
GenericValue executeFPToSIInst(Value *SrcVal, Type *DstTy,
|
|
ExecutionContext &SF);
|
|
GenericValue executeUIToFPInst(Value *SrcVal, Type *DstTy,
|
|
ExecutionContext &SF);
|
|
GenericValue executeSIToFPInst(Value *SrcVal, Type *DstTy,
|
|
ExecutionContext &SF);
|
|
GenericValue executePtrToIntInst(Value *SrcVal, Type *DstTy,
|
|
ExecutionContext &SF);
|
|
GenericValue executeIntToPtrInst(Value *SrcVal, Type *DstTy,
|
|
ExecutionContext &SF);
|
|
GenericValue executeBitCastInst(Value *SrcVal, Type *DstTy,
|
|
ExecutionContext &SF);
|
|
GenericValue executeCastOperation(Instruction::CastOps opcode, Value *SrcVal,
|
|
Type *Ty, ExecutionContext &SF);
|
|
void popStackAndReturnValueToCaller(Type *RetTy, GenericValue Result);
|
|
|
|
};
|
|
|
|
} // End llvm namespace
|
|
|
|
#endif
|