//===-- Interpreter.h ------------------------------------------*- C++ -*--===//
//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and 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
-// Uncomment this line to enable profiling of structure field accesses.
-//#define PROFILE_STRUCTURE_FIELDS 1
-
-#include "../ExecutionEngine.h"
-#include "../GenericValue.h"
-#include "Support/DataTypes.h"
-#include "llvm/Assembly/CachedWriter.h"
-#include "llvm/Target/TargetData.h"
-#include "llvm/BasicBlock.h"
+#include "llvm/Function.h"
+#include "llvm/ExecutionEngine/ExecutionEngine.h"
+#include "llvm/ExecutionEngine/GenericValue.h"
+#include "llvm/ADT/APInt.h"
#include "llvm/Support/InstVisitor.h"
+#include "llvm/Support/CallSite.h"
+#include "llvm/Target/TargetData.h"
+#include "llvm/Support/DataTypes.h"
+
+namespace llvm {
-extern CachedWriter CW; // Object to accelerate printing of 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;
-struct FunctionInfo; // Defined in ExecutionAnnotations.h
// AllocaHolder - Object to track all of the blocks of memory allocated by
-// alloca. When the function returns, this object is poped off the execution
+// 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 {
Function *CurFunction;// The currently executing function
BasicBlock *CurBB; // The currently executing BB
BasicBlock::iterator CurInst; // The next instruction to execute
- FunctionInfo *FuncInfo; // The FuncInfo annotation for the function
- std::vector<ValuePlaneTy> Values;// ValuePlanes for each type
+ std::map<Value *, GenericValue> Values; // LLVM values used in this invocation
std::vector<GenericValue> VarArgs; // Values passed through an ellipsis
-
- CallInst *Caller; // Holds the call that called subframes.
- // NULL if main func or debugger invoked fn
+ 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> {
- int ExitCode; // The exit code to be returned by the lli util
- bool Debug; // Debug mode enabled?
- bool Profile; // Profiling enabled?
- bool Trace; // Tracing enabled?
- int CurFrame; // The current stack frame being inspected
+ 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.
+ // AtExitHandlers - List of functions to call when the program exits,
+ // registered with the atexit() library function.
std::vector<Function*> AtExitHandlers;
-public:
- Interpreter(Module *M, unsigned Config, bool DebugMode, bool TraceMode);
- inline ~Interpreter() { CW.setModule(0); }
- // getExitCode - return the code that should be the exit code for the lli
- // utility.
- inline int getExitCode() const { return ExitCode; }
+public:
+ explicit Interpreter(Module *M);
+ ~Interpreter();
- /// run - Start execution with the specified function and arguments.
+ /// runAtExitHandlers - Run any functions registered by the program's calls to
+ /// atexit(3), which we intercept and store in AtExitHandlers.
///
- virtual int run(const std::string &FnName,
- const std::vector<std::string> &Args);
-
-
- // enableProfiling() - Turn profiling on, clear stats?
- void enableProfiling() { Profile = true; }
- void enableTracing() { Trace = true; }
+ void runAtExitHandlers();
- void handleUserInput();
+ static void Register() {
+ InterpCtor = create;
+ }
+
+ /// create - Create an interpreter ExecutionEngine. This can never fail.
+ ///
+ static ExecutionEngine *create(ModuleProvider *M, std::string *ErrorStr = 0);
- // User Interation Methods...
- bool callFunction(const std::string &Name); // return true on failure
- void setBreakpoint(const std::string &Name);
- void infoValue(const std::string &Name);
- void print(const std::string &Name);
- static void print(const Type *Ty, GenericValue V);
- static void printValue(const Type *Ty, GenericValue V);
+ /// run - Start execution with the specified function and arguments.
+ ///
+ virtual GenericValue runFunction(Function *F,
+ const std::vector<GenericValue> &ArgValues);
- bool callMainFunction(const std::string &MainName,
- const std::vector<std::string> &InputFilename);
+ /// recompileAndRelinkFunction - For the interpreter, functions are always
+ /// up-to-date.
+ ///
+ virtual void *recompileAndRelinkFunction(Function *F) {
+ return getPointerToFunction(F);
+ }
- void list(); // Do the 'list' command
- void printStackTrace(); // Do the 'backtrace' command
+ /// freeMachineCodeForFunction - The interpreter does not generate any code.
+ ///
+ void freeMachineCodeForFunction(Function *F) { }
- // Code execution methods...
+ // Methods used to execute code:
+ // Place a call on the stack
void callFunction(Function *F, const std::vector<GenericValue> &ArgVals);
- bool executeInstruction(); // Execute one instruction...
-
- void stepInstruction(); // Do the 'step' command
- void nextInstruction(); // Do the 'next' command
- void run(); // Do the 'run' command
- void finish(); // Do the 'finish' command
+ void run(); // Execute instructions until nothing left to do
// Opcode Implementations
void visitReturnInst(ReturnInst &I);
void visitSwitchInst(SwitchInst &I);
void visitBinaryOperator(BinaryOperator &I);
+ void visitICmpInst(ICmpInst &I);
+ void visitFCmpInst(FCmpInst &I);
void visitAllocationInst(AllocationInst &I);
void visitFreeInst(FreeInst &I);
void visitLoadInst(LoadInst &I);
void visitStoreInst(StoreInst &I);
void visitGetElementPtrInst(GetElementPtrInst &I);
-
void visitPHINode(PHINode &PN) { assert(0 && "PHI nodes already handled!"); }
- void visitCastInst(CastInst &I);
- void visitCallInst(CallInst &I);
- void visitShl(ShiftInst &I);
- void visitShr(ShiftInst &I);
- void visitVarArgInst(VarArgInst &I);
+ 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 visitUnwindInst(UnwindInst &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) {
- std::cerr << I;
+ cerr << I;
assert(0 && "Instruction not interpretable yet!");
}
- GenericValue callExternalFunction(Function *F,
+ GenericValue callExternalFunction(Function *F,
const std::vector<GenericValue> &ArgVals);
void exitCalled(GenericValue GV);
- // getCurrentFunction - Return the currently executing function
- inline Function *getCurrentFunction() const {
- return CurFrame < 0 ? 0 : ECStack[CurFrame].CurFunction;
- }
-
- // isStopped - Return true if a program is stopped. Return false if no
- // program is running.
- //
- inline bool isStopped() const { return !ECStack.empty(); }
-
void addAtExitHandler(Function *F) {
AtExitHandlers.push_back(F);
}
+ GenericValue *getFirstVarArg () {
+ return &(ECStack.back ().VarArgs[0]);
+ }
+
//FIXME: private:
public:
- GenericValue executeGEPOperation(Value *Ptr, User::op_iterator I,
- User::op_iterator E, ExecutionContext &SF);
+ GenericValue executeGEPOperation(Value *Ptr, gep_type_iterator I,
+ gep_type_iterator E, ExecutionContext &SF);
private: // Helper functions
// 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; }
- // getCurrentExecutablePath() - Return the directory that the lli executable
- // lives in.
- //
- std::string getCurrentExecutablePath() const;
-
- // printCurrentInstruction - Print out the instruction that the virtual PC is
- // at, or fail silently if no program is running.
- //
- void printCurrentInstruction();
-
- // printStackFrame - Print information about the specified stack frame, or -1
- // for the default one.
- //
- void printStackFrame(int FrameNo = -1);
-
- // LookupMatchingNames - Search the current function namespace, then the
- // global namespace looking for values that match the specified name. Return
- // ALL matches to that name. This is obviously slow, and should only be used
- // for user interaction.
- //
- std::vector<Value*> LookupMatchingNames(const std::string &Name);
-
- // ChooseOneOption - Prompt the user to choose among the specified options to
- // pick one value. If no options are provided, emit an error. If a single
- // option is provided, just return that option.
- //
- Value *ChooseOneOption(const std::string &Name,
- const std::vector<Value*> &Opts);
-
- // PerformExitStuff - Print out counters and profiling information if
- // applicable...
- void PerformExitStuff();
-
void initializeExecutionEngine();
void initializeExternalFunctions();
+ GenericValue getConstantExprValue(ConstantExpr *CE, ExecutionContext &SF);
+ GenericValue getOperandValue(Value *V, ExecutionContext &SF);
+ GenericValue executeTruncInst(Value *SrcVal, const Type *DstTy,
+ ExecutionContext &SF);
+ GenericValue executeSExtInst(Value *SrcVal, const Type *DstTy,
+ ExecutionContext &SF);
+ GenericValue executeZExtInst(Value *SrcVal, const Type *DstTy,
+ ExecutionContext &SF);
+ GenericValue executeFPTruncInst(Value *SrcVal, const Type *DstTy,
+ ExecutionContext &SF);
+ GenericValue executeFPExtInst(Value *SrcVal, const Type *DstTy,
+ ExecutionContext &SF);
+ GenericValue executeFPToUIInst(Value *SrcVal, const Type *DstTy,
+ ExecutionContext &SF);
+ GenericValue executeFPToSIInst(Value *SrcVal, const Type *DstTy,
+ ExecutionContext &SF);
+ GenericValue executeUIToFPInst(Value *SrcVal, const Type *DstTy,
+ ExecutionContext &SF);
+ GenericValue executeSIToFPInst(Value *SrcVal, const Type *DstTy,
+ ExecutionContext &SF);
+ GenericValue executePtrToIntInst(Value *SrcVal, const Type *DstTy,
+ ExecutionContext &SF);
+ GenericValue executeIntToPtrInst(Value *SrcVal, const Type *DstTy,
+ ExecutionContext &SF);
+ GenericValue executeBitCastInst(Value *SrcVal, const Type *DstTy,
+ ExecutionContext &SF);
+ GenericValue executeCastOperation(Instruction::CastOps opcode, Value *SrcVal,
+ const Type *Ty, ExecutionContext &SF);
+ void popStackAndReturnValueToCaller(const Type *RetTy, GenericValue Result);
+
};
+} // End llvm namespace
+
#endif
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