//===-- Execution.cpp - Implement code to simulate the program ------------===//
-//
+//
+// 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 file contains the actual instruction interpreter.
//
//===----------------------------------------------------------------------===//
+#define DEBUG_TYPE "interpreter"
#include "Interpreter.h"
-#include "ExecutionAnnotations.h"
-#include "llvm/iPHINode.h"
-#include "llvm/iOther.h"
-#include "llvm/iTerminators.h"
-#include "llvm/iMemory.h"
-#include "llvm/DerivedTypes.h"
#include "llvm/Constants.h"
-#include "llvm/Assembly/Writer.h"
-#include "llvm/Target/TargetData.h"
-#include "Support/CommandLine.h"
-#include <math.h> // For fmod
-#include <signal.h>
-#include <setjmp.h>
-using std::vector;
-using std::cout;
-using std::cerr;
-
-static cl::opt<bool>
-QuietMode("quiet", cl::desc("Do not emit any non-program output"));
-
-static cl::alias
-QuietModeA("q", cl::desc("Alias for -quiet"), cl::aliasopt(QuietMode));
-
-static cl::opt<bool>
-ArrayChecksEnabled("array-checks", cl::desc("Enable array bound checks"));
-
-static cl::opt<bool>
-AbortOnExceptions("abort-on-exception",
- cl::desc("Halt execution on a machine exception"));
-
-// Create a TargetData structure to handle memory addressing and size/alignment
-// computations
-//
-static TargetData TD("lli Interpreter");
-CachedWriter CW; // Object to accelerate printing of LLVM
-
-
-#ifdef PROFILE_STRUCTURE_FIELDS
-static cl::opt<bool>
-ProfileStructureFields("profilestructfields",
- cl::desc("Profile Structure Field Accesses"));
-#include <map>
-static std::map<const StructType *, vector<unsigned> > FieldAccessCounts;
-#endif
-
-sigjmp_buf SignalRecoverBuffer;
-static bool InInstruction = false;
-
-extern "C" {
-static void SigHandler(int Signal) {
- if (InInstruction)
- siglongjmp(SignalRecoverBuffer, Signal);
-}
-}
+#include "llvm/DerivedTypes.h"
+#include "llvm/Instructions.h"
+#include "llvm/CodeGen/IntrinsicLowering.h"
+#include "llvm/Support/GetElementPtrTypeIterator.h"
+#include "llvm/ADT/Statistic.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/MathExtras.h"
+#include <cmath>
+using namespace llvm;
-static void initializeSignalHandlers() {
- struct sigaction Action;
- Action.sa_handler = SigHandler;
- Action.sa_flags = SA_SIGINFO;
- sigemptyset(&Action.sa_mask);
- sigaction(SIGSEGV, &Action, 0);
- sigaction(SIGBUS, &Action, 0);
- sigaction(SIGINT, &Action, 0);
- sigaction(SIGFPE, &Action, 0);
-}
+STATISTIC(NumDynamicInsts, "Number of dynamic instructions executed");
+static Interpreter *TheEE = 0;
//===----------------------------------------------------------------------===//
// Value Manipulation code
//===----------------------------------------------------------------------===//
-static unsigned getOperandSlot(Value *V) {
- SlotNumber *SN = (SlotNumber*)V->getAnnotation(SlotNumberAID);
- assert(SN && "Operand does not have a slot number annotation!");
- return SN->SlotNum;
+static GenericValue executeAddInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty);
+static GenericValue executeSubInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty);
+static GenericValue executeMulInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty);
+static GenericValue executeUDivInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty);
+static GenericValue executeSDivInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty);
+static GenericValue executeFDivInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty);
+static GenericValue executeURemInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty);
+static GenericValue executeSRemInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty);
+static GenericValue executeFRemInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty);
+static GenericValue executeAndInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty);
+static GenericValue executeOrInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty);
+static GenericValue executeXorInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty);
+static GenericValue executeCmpInst(unsigned predicate, GenericValue Src1,
+ GenericValue Src2, const Type *Ty);
+static GenericValue executeShlInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty);
+static GenericValue executeLShrInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty);
+static GenericValue executeAShrInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty);
+static GenericValue executeSelectInst(GenericValue Src1, GenericValue Src2,
+ GenericValue Src3);
+
+GenericValue Interpreter::getConstantExprValue (ConstantExpr *CE,
+ ExecutionContext &SF) {
+ switch (CE->getOpcode()) {
+ case Instruction::Trunc:
+ return executeTruncInst(CE->getOperand(0), CE->getType(), SF);
+ case Instruction::ZExt:
+ return executeZExtInst(CE->getOperand(0), CE->getType(), SF);
+ case Instruction::SExt:
+ return executeSExtInst(CE->getOperand(0), CE->getType(), SF);
+ case Instruction::FPTrunc:
+ return executeFPTruncInst(CE->getOperand(0), CE->getType(), SF);
+ case Instruction::FPExt:
+ return executeFPExtInst(CE->getOperand(0), CE->getType(), SF);
+ case Instruction::UIToFP:
+ return executeUIToFPInst(CE->getOperand(0), CE->getType(), SF);
+ case Instruction::SIToFP:
+ return executeSIToFPInst(CE->getOperand(0), CE->getType(), SF);
+ case Instruction::FPToUI:
+ return executeFPToUIInst(CE->getOperand(0), CE->getType(), SF);
+ case Instruction::FPToSI:
+ return executeFPToSIInst(CE->getOperand(0), CE->getType(), SF);
+ case Instruction::PtrToInt:
+ return executePtrToIntInst(CE->getOperand(0), CE->getType(), SF);
+ case Instruction::IntToPtr:
+ return executeIntToPtrInst(CE->getOperand(0), CE->getType(), SF);
+ case Instruction::BitCast:
+ return executeBitCastInst(CE->getOperand(0), CE->getType(), SF);
+ case Instruction::GetElementPtr:
+ return executeGEPOperation(CE->getOperand(0), gep_type_begin(CE),
+ gep_type_end(CE), SF);
+ case Instruction::Add:
+ return executeAddInst(getOperandValue(CE->getOperand(0), SF),
+ getOperandValue(CE->getOperand(1), SF),
+ CE->getOperand(0)->getType());
+ case Instruction::Sub:
+ return executeSubInst(getOperandValue(CE->getOperand(0), SF),
+ getOperandValue(CE->getOperand(1), SF),
+ CE->getOperand(0)->getType());
+ case Instruction::Mul:
+ return executeMulInst(getOperandValue(CE->getOperand(0), SF),
+ getOperandValue(CE->getOperand(1), SF),
+ CE->getOperand(0)->getType());
+ case Instruction::SDiv:
+ return executeSDivInst(getOperandValue(CE->getOperand(0), SF),
+ getOperandValue(CE->getOperand(1), SF),
+ CE->getOperand(0)->getType());
+ case Instruction::UDiv:
+ return executeUDivInst(getOperandValue(CE->getOperand(0), SF),
+ getOperandValue(CE->getOperand(1), SF),
+ CE->getOperand(0)->getType());
+ case Instruction::FDiv:
+ return executeFDivInst(getOperandValue(CE->getOperand(0), SF),
+ getOperandValue(CE->getOperand(1), SF),
+ CE->getOperand(0)->getType());
+ case Instruction::URem:
+ return executeURemInst(getOperandValue(CE->getOperand(0), SF),
+ getOperandValue(CE->getOperand(1), SF),
+ CE->getOperand(0)->getType());
+ case Instruction::SRem:
+ return executeSRemInst(getOperandValue(CE->getOperand(0), SF),
+ getOperandValue(CE->getOperand(1), SF),
+ CE->getOperand(0)->getType());
+ case Instruction::FRem:
+ return executeFRemInst(getOperandValue(CE->getOperand(0), SF),
+ getOperandValue(CE->getOperand(1), SF),
+ CE->getOperand(0)->getType());
+ case Instruction::And:
+ return executeAndInst(getOperandValue(CE->getOperand(0), SF),
+ getOperandValue(CE->getOperand(1), SF),
+ CE->getOperand(0)->getType());
+ case Instruction::Or:
+ return executeOrInst(getOperandValue(CE->getOperand(0), SF),
+ getOperandValue(CE->getOperand(1), SF),
+ CE->getOperand(0)->getType());
+ case Instruction::Xor:
+ return executeXorInst(getOperandValue(CE->getOperand(0), SF),
+ getOperandValue(CE->getOperand(1), SF),
+ CE->getOperand(0)->getType());
+ case Instruction::FCmp:
+ case Instruction::ICmp:
+ return executeCmpInst(CE->getPredicate(),
+ getOperandValue(CE->getOperand(0), SF),
+ getOperandValue(CE->getOperand(1), SF),
+ CE->getOperand(0)->getType());
+ case Instruction::Shl:
+ return executeShlInst(getOperandValue(CE->getOperand(0), SF),
+ getOperandValue(CE->getOperand(1), SF),
+ CE->getOperand(0)->getType());
+ case Instruction::LShr:
+ return executeLShrInst(getOperandValue(CE->getOperand(0), SF),
+ getOperandValue(CE->getOperand(1), SF),
+ CE->getOperand(0)->getType());
+ case Instruction::AShr:
+ return executeAShrInst(getOperandValue(CE->getOperand(0), SF),
+ getOperandValue(CE->getOperand(1), SF),
+ CE->getOperand(0)->getType());
+ case Instruction::Select:
+ return executeSelectInst(getOperandValue(CE->getOperand(0), SF),
+ getOperandValue(CE->getOperand(1), SF),
+ getOperandValue(CE->getOperand(2), SF));
+ default:
+ cerr << "Unhandled ConstantExpr: " << *CE << "\n";
+ abort();
+ return GenericValue();
+ }
}
-#define GET_CONST_VAL(TY, CLASS) \
- case Type::TY##TyID: Result.TY##Val = cast<CLASS>(CPV)->getValue(); break
-
-// Operations used by constant expr implementations...
-static GenericValue executeCastOperation(Value *Src, const Type *DestTy,
- ExecutionContext &SF);
-static GenericValue executeGEPOperation(Value *Src, User::op_iterator IdxBegin,
- User::op_iterator IdxEnd,
- ExecutionContext &SF);
-static GenericValue executeAddInst(GenericValue Src1, GenericValue Src2,
- const Type *Ty, ExecutionContext &SF);
-
-static GenericValue getOperandValue(Value *V, ExecutionContext &SF) {
+GenericValue Interpreter::getOperandValue(Value *V, ExecutionContext &SF) {
if (ConstantExpr *CE = dyn_cast<ConstantExpr>(V)) {
- switch (CE->getOpcode()) {
- case Instruction::Cast:
- return executeCastOperation(CE->getOperand(0), CE->getType(), SF);
- case Instruction::GetElementPtr:
- return executeGEPOperation(CE->getOperand(0), CE->op_begin()+1,
- CE->op_end(), SF);
- case Instruction::Add:
- return executeAddInst(getOperandValue(CE->getOperand(0), SF),
- getOperandValue(CE->getOperand(1), SF),
- CE->getType(), SF);
- default:
- cerr << "Unhandled ConstantExpr: " << CE << "\n";
- abort();
- { GenericValue V; return V; }
- }
+ return getConstantExprValue(CE, SF);
} else if (Constant *CPV = dyn_cast<Constant>(V)) {
- GenericValue Result;
- switch (CPV->getType()->getPrimitiveID()) {
- GET_CONST_VAL(Bool , ConstantBool);
- GET_CONST_VAL(UByte , ConstantUInt);
- GET_CONST_VAL(SByte , ConstantSInt);
- GET_CONST_VAL(UShort , ConstantUInt);
- GET_CONST_VAL(Short , ConstantSInt);
- GET_CONST_VAL(UInt , ConstantUInt);
- GET_CONST_VAL(Int , ConstantSInt);
- GET_CONST_VAL(ULong , ConstantUInt);
- GET_CONST_VAL(Long , ConstantSInt);
- GET_CONST_VAL(Float , ConstantFP);
- GET_CONST_VAL(Double , ConstantFP);
- case Type::PointerTyID:
- if (isa<ConstantPointerNull>(CPV)) {
- Result.PointerVal = 0;
- } else if (ConstantPointerRef *CPR = dyn_cast<ConstantPointerRef>(CPV)) {
- return getOperandValue(CPR->getValue(), SF);
- } else {
- assert(0 && "Unknown constant pointer type!");
- }
- break;
- default:
- cout << "ERROR: Constant unimp for type: " << CPV->getType() << "\n";
- }
- return Result;
+ return getConstantValue(CPV);
} else if (GlobalValue *GV = dyn_cast<GlobalValue>(V)) {
- GlobalAddress *Address =
- (GlobalAddress*)GV->getOrCreateAnnotation(GlobalAddressAID);
- GenericValue Result;
- Result.PointerVal = (PointerTy)(GenericValue*)Address->Ptr;
- return Result;
+ return PTOGV(getPointerToGlobal(GV));
} else {
- unsigned TyP = V->getType()->getUniqueID(); // TypePlane for value
- unsigned OpSlot = getOperandSlot(V);
- assert(TyP < SF.Values.size() &&
- OpSlot < SF.Values[TyP].size() && "Value out of range!");
- return SF.Values[TyP][getOperandSlot(V)];
- }
-}
-
-static void printOperandInfo(Value *V, ExecutionContext &SF) {
- if (isa<Constant>(V)) {
- cout << "Constant Pool Value\n";
- } else if (isa<GlobalValue>(V)) {
- cout << "Global Value\n";
- } else {
- unsigned TyP = V->getType()->getUniqueID(); // TypePlane for value
- unsigned Slot = getOperandSlot(V);
- cout << "Value=" << (void*)V << " TypeID=" << TyP << " Slot=" << Slot
- << " Addr=" << &SF.Values[TyP][Slot] << " SF=" << &SF
- << " Contents=0x";
-
- const unsigned char *Buf = (const unsigned char*)&SF.Values[TyP][Slot];
- for (unsigned i = 0; i < sizeof(GenericValue); ++i) {
- unsigned char Cur = Buf[i];
- cout << ( Cur >= 160? char((Cur>>4)+'A'-10) : char((Cur>>4) + '0'))
- << ((Cur&15) >= 10? char((Cur&15)+'A'-10) : char((Cur&15) + '0'));
- }
- cout << "\n";
+ return SF.Values[V];
}
}
-
-
static void SetValue(Value *V, GenericValue Val, ExecutionContext &SF) {
- unsigned TyP = V->getType()->getUniqueID(); // TypePlane for value
-
- //cout << "Setting value: " << &SF.Values[TyP][getOperandSlot(V)] << "\n";
- SF.Values[TyP][getOperandSlot(V)] = Val;
+ SF.Values[V] = Val;
}
+void Interpreter::initializeExecutionEngine() {
+ TheEE = this;
+}
//===----------------------------------------------------------------------===//
-// Annotation Wrangling code
+// Binary Instruction Implementations
//===----------------------------------------------------------------------===//
-void Interpreter::initializeExecutionEngine() {
- AnnotationManager::registerAnnotationFactory(MethodInfoAID,
- &MethodInfo::Create);
- AnnotationManager::registerAnnotationFactory(GlobalAddressAID,
- &GlobalAddress::Create);
- initializeSignalHandlers();
-}
+#define IMPLEMENT_BINARY_OPERATOR(OP, TY) \
+ case Type::TY##TyID: Dest.TY##Val = Src1.TY##Val OP Src2.TY##Val; break
-// InitializeMemory - Recursive function to apply a Constant value into the
-// specified memory location...
-//
-static void InitializeMemory(const Constant *Init, char *Addr) {
-#define INITIALIZE_MEMORY(TYID, CLASS, TY) \
- case Type::TYID##TyID: { \
- TY Tmp = cast<CLASS>(Init)->getValue(); \
- memcpy(Addr, &Tmp, sizeof(TY)); \
- } return
-
- switch (Init->getType()->getPrimitiveID()) {
- INITIALIZE_MEMORY(Bool , ConstantBool, bool);
- INITIALIZE_MEMORY(UByte , ConstantUInt, unsigned char);
- INITIALIZE_MEMORY(SByte , ConstantSInt, signed char);
- INITIALIZE_MEMORY(UShort , ConstantUInt, unsigned short);
- INITIALIZE_MEMORY(Short , ConstantSInt, signed short);
- INITIALIZE_MEMORY(UInt , ConstantUInt, unsigned int);
- INITIALIZE_MEMORY(Int , ConstantSInt, signed int);
- INITIALIZE_MEMORY(ULong , ConstantUInt, uint64_t);
- INITIALIZE_MEMORY(Long , ConstantSInt, int64_t);
- INITIALIZE_MEMORY(Float , ConstantFP , float);
- INITIALIZE_MEMORY(Double , ConstantFP , double);
-#undef INITIALIZE_MEMORY
-
- case Type::ArrayTyID: {
- const ConstantArray *CPA = cast<ConstantArray>(Init);
- const vector<Use> &Val = CPA->getValues();
- unsigned ElementSize =
- TD.getTypeSize(cast<ArrayType>(CPA->getType())->getElementType());
- for (unsigned i = 0; i < Val.size(); ++i)
- InitializeMemory(cast<Constant>(Val[i].get()), Addr+i*ElementSize);
- return;
+#define IMPLEMENT_INTEGER_BINOP(OP, TY) \
+ case Type::IntegerTyID: { \
+ unsigned BitWidth = cast<IntegerType>(TY)->getBitWidth(); \
+ if (BitWidth == 1) \
+ Dest.Int1Val = Src1.Int1Val OP Src2.Int1Val; \
+ else if (BitWidth <= 8) \
+ Dest.Int8Val = Src1.Int8Val OP Src2.Int8Val; \
+ else if (BitWidth <= 16) \
+ Dest.Int16Val = Src1.Int16Val OP Src2.Int16Val; \
+ else if (BitWidth <= 32) \
+ Dest.Int32Val = Src1.Int32Val OP Src2.Int32Val; \
+ else if (BitWidth <= 64) \
+ Dest.Int64Val = Src1.Int64Val OP Src2.Int64Val; \
+ else \
+ cerr << "Integer types > 64 bits not supported: " << *Ty << "\n"; \
+ maskToBitWidth(Dest, BitWidth); \
+ break; \
+ }
+
+#define IMPLEMENT_SIGNED_BINOP(OP, TY) \
+ if (const IntegerType *ITy = dyn_cast<IntegerType>(TY)) { \
+ unsigned BitWidth = ITy->getBitWidth(); \
+ if (BitWidth <= 8) \
+ Dest.Int8Val = ((int8_t)Src1.Int8Val) OP ((int8_t)Src2.Int8Val); \
+ else if (BitWidth <= 16) \
+ Dest.Int16Val = ((int16_t)Src1.Int16Val) OP ((int16_t)Src2.Int16Val); \
+ else if (BitWidth <= 32) \
+ Dest.Int32Val = ((int32_t)Src1.Int32Val) OP ((int32_t)Src2.Int32Val); \
+ else if (BitWidth <= 64) \
+ Dest.Int64Val = ((int64_t)Src1.Int64Val) OP ((int64_t)Src2.Int64Val); \
+ else { \
+ cerr << "Integer types > 64 bits not supported: " << *Ty << "\n"; \
+ abort(); \
+ } \
+ maskToBitWidth(Dest, BitWidth); \
+ } else { \
+ cerr << "Unhandled type for " #OP " operator: " << *Ty << "\n"; \
+ abort(); \
+ }
+
+#define IMPLEMENT_UNSIGNED_BINOP(OP, TY) \
+ if (const IntegerType *ITy = dyn_cast<IntegerType>(TY)) { \
+ unsigned BitWidth = ITy->getBitWidth(); \
+ if (BitWidth <= 8) \
+ Dest.Int8Val = ((uint8_t)Src1.Int8Val) OP ((uint8_t)Src2.Int8Val); \
+ else if (BitWidth <= 16) \
+ Dest.Int16Val = ((uint16_t)Src1.Int16Val) OP ((uint16_t)Src2.Int16Val); \
+ else if (BitWidth <= 32) \
+ Dest.Int32Val = ((uint32_t)Src1.Int32Val) OP ((uint32_t)Src2.Int32Val); \
+ else if (BitWidth <= 64) \
+ Dest.Int64Val = ((uint64_t)Src1.Int64Val) OP ((uint64_t)Src2.Int64Val); \
+ else { \
+ cerr << "Integer types > 64 bits not supported: " << *Ty << "\n"; \
+ abort(); \
+ } \
+ maskToBitWidth(Dest, BitWidth); \
+ } else { \
+ cerr << "Unhandled type for " #OP " operator: " << *Ty << "\n"; \
+ abort(); \
}
- case Type::StructTyID: {
- const ConstantStruct *CPS = cast<ConstantStruct>(Init);
- const StructLayout *SL=TD.getStructLayout(cast<StructType>(CPS->getType()));
- const vector<Use> &Val = CPS->getValues();
- for (unsigned i = 0; i < Val.size(); ++i)
- InitializeMemory(cast<Constant>(Val[i].get()),
- Addr+SL->MemberOffsets[i]);
- return;
+static GenericValue executeAddInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ switch (Ty->getTypeID()) {
+ IMPLEMENT_INTEGER_BINOP(+, Ty);
+ IMPLEMENT_BINARY_OPERATOR(+, Float);
+ IMPLEMENT_BINARY_OPERATOR(+, Double);
+ default:
+ cerr << "Unhandled type for Add instruction: " << *Ty << "\n";
+ abort();
}
+ return Dest;
+}
- case Type::PointerTyID:
- if (isa<ConstantPointerNull>(Init)) {
- *(void**)Addr = 0;
- } else if (const ConstantPointerRef *CPR =
- dyn_cast<ConstantPointerRef>(Init)) {
- GlobalAddress *Address =
- (GlobalAddress*)CPR->getValue()->getOrCreateAnnotation(GlobalAddressAID);
- *(void**)Addr = (GenericValue*)Address->Ptr;
- } else {
- assert(0 && "Unknown Constant pointer type!");
- }
- return;
+static GenericValue executeSubInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ switch (Ty->getTypeID()) {
+ IMPLEMENT_INTEGER_BINOP(-, Ty);
+ IMPLEMENT_BINARY_OPERATOR(-, Float);
+ IMPLEMENT_BINARY_OPERATOR(-, Double);
+ default:
+ cerr << "Unhandled type for Sub instruction: " << *Ty << "\n";
+ abort();
+ }
+ return Dest;
+}
+static GenericValue executeMulInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ switch (Ty->getTypeID()) {
+ IMPLEMENT_INTEGER_BINOP(*, Ty);
+ IMPLEMENT_BINARY_OPERATOR(*, Float);
+ IMPLEMENT_BINARY_OPERATOR(*, Double);
default:
- CW << "Bad Type: " << Init->getType() << "\n";
- assert(0 && "Unknown constant type to initialize memory with!");
+ cerr << "Unhandled type for Mul instruction: " << *Ty << "\n";
+ abort();
}
+ return Dest;
}
-Annotation *GlobalAddress::Create(AnnotationID AID, const Annotable *O, void *){
- assert(AID == GlobalAddressAID);
+static GenericValue executeUDivInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ IMPLEMENT_UNSIGNED_BINOP(/,Ty)
+ return Dest;
+}
- // This annotation will only be created on GlobalValue objects...
- GlobalValue *GVal = cast<GlobalValue>((Value*)O);
+static GenericValue executeSDivInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ IMPLEMENT_SIGNED_BINOP(/,Ty)
+ return Dest;
+}
- if (isa<Function>(GVal)) {
- // The GlobalAddress object for a function is just a pointer to function
- // itself. Don't delete it when the annotation is gone though!
- return new GlobalAddress(GVal, false);
+static GenericValue executeFDivInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ switch (Ty->getTypeID()) {
+ IMPLEMENT_BINARY_OPERATOR(/, Float);
+ IMPLEMENT_BINARY_OPERATOR(/, Double);
+ default:
+ cerr << "Unhandled type for FDiv instruction: " << *Ty << "\n";
+ abort();
}
+ return Dest;
+}
- // Handle the case of a global variable...
- assert(isa<GlobalVariable>(GVal) &&
- "Global value found that isn't a function or global variable!");
- GlobalVariable *GV = cast<GlobalVariable>(GVal);
-
- // First off, we must allocate space for the global variable to point at...
- const Type *Ty = GV->getType()->getElementType(); // Type to be allocated
+static GenericValue executeURemInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ IMPLEMENT_UNSIGNED_BINOP(%, Ty)
+ return Dest;
+}
- // Allocate enough memory to hold the type...
- void *Addr = calloc(1, TD.getTypeSize(Ty));
- assert(Addr != 0 && "Null pointer returned by malloc!");
+static GenericValue executeSRemInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ IMPLEMENT_SIGNED_BINOP(%, Ty)
+ return Dest;
+}
- // Initialize the memory if there is an initializer...
- if (GV->hasInitializer())
- InitializeMemory(GV->getInitializer(), (char*)Addr);
+static GenericValue executeFRemInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ switch (Ty->getTypeID()) {
+ case Type::FloatTyID:
+ Dest.FloatVal = fmod(Src1.FloatVal, Src2.FloatVal);
+ break;
+ case Type::DoubleTyID:
+ Dest.DoubleVal = fmod(Src1.DoubleVal, Src2.DoubleVal);
+ break;
+ default:
+ cerr << "Unhandled type for Rem instruction: " << *Ty << "\n";
+ abort();
+ }
+ return Dest;
+}
- return new GlobalAddress(Addr, true); // Simply invoke the ctor
+static GenericValue executeAndInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ IMPLEMENT_UNSIGNED_BINOP(&, Ty)
+ return Dest;
}
-//===----------------------------------------------------------------------===//
-// Binary Instruction Implementations
-//===----------------------------------------------------------------------===//
+static GenericValue executeOrInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ IMPLEMENT_UNSIGNED_BINOP(|, Ty)
+ return Dest;
+}
-#define IMPLEMENT_BINARY_OPERATOR(OP, TY) \
- case Type::TY##TyID: Dest.TY##Val = Src1.TY##Val OP Src2.TY##Val; break
+static GenericValue executeXorInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ IMPLEMENT_UNSIGNED_BINOP(^, Ty)
+ return Dest;
+}
-static GenericValue executeAddInst(GenericValue Src1, GenericValue Src2,
- const Type *Ty, ExecutionContext &SF) {
+#define IMPLEMENT_SIGNED_ICMP(OP, TY) \
+ case Type::IntegerTyID: { \
+ unsigned BitWidth = cast<IntegerType>(TY)->getBitWidth(); \
+ if (BitWidth == 1) \
+ Dest.Int1Val = ((int8_t)Src1.Int1Val) OP ((int8_t)Src2.Int1Val); \
+ else if (BitWidth <= 8) \
+ Dest.Int1Val = ((int8_t)Src1.Int8Val) OP ((int8_t)Src2.Int8Val); \
+ else if (BitWidth <= 16) \
+ Dest.Int1Val = ((int16_t)Src1.Int16Val) OP ((int16_t)Src2.Int16Val); \
+ else if (BitWidth <= 32) \
+ Dest.Int1Val = ((int32_t)Src1.Int32Val) OP ((int32_t)Src2.Int32Val); \
+ else if (BitWidth <= 64) \
+ Dest.Int1Val = ((int64_t)Src1.Int64Val) OP ((int64_t)Src2.Int64Val); \
+ else { \
+ cerr << "Integer types > 64 bits not supported: " << *Ty << "\n"; \
+ abort(); \
+ } \
+ maskToBitWidth(Dest, BitWidth); \
+ break; \
+ }
+
+#define IMPLEMENT_UNSIGNED_ICMP(OP, TY) \
+ case Type::IntegerTyID: { \
+ unsigned BitWidth = cast<IntegerType>(TY)->getBitWidth(); \
+ if (BitWidth == 1) \
+ Dest.Int1Val = ((uint8_t)Src1.Int1Val) OP ((uint8_t)Src2.Int1Val); \
+ else if (BitWidth <= 8) \
+ Dest.Int1Val = ((uint8_t)Src1.Int8Val) OP ((uint8_t)Src2.Int8Val); \
+ else if (BitWidth <= 16) \
+ Dest.Int1Val = ((uint16_t)Src1.Int16Val) OP ((uint16_t)Src2.Int16Val); \
+ else if (BitWidth <= 32) \
+ Dest.Int1Val = ((uint32_t)Src1.Int32Val) OP ((uint32_t)Src2.Int32Val); \
+ else if (BitWidth <= 64) \
+ Dest.Int1Val = ((uint64_t)Src1.Int64Val) OP ((uint64_t)Src2.Int64Val); \
+ else { \
+ cerr << "Integer types > 64 bits not supported: " << *Ty << "\n"; \
+ abort(); \
+ } \
+ maskToBitWidth(Dest, BitWidth); \
+ break; \
+ }
+
+// Handle pointers specially because they must be compared with only as much
+// width as the host has. We _do not_ want to be comparing 64 bit values when
+// running on a 32-bit target, otherwise the upper 32 bits might mess up
+// comparisons if they contain garbage.
+#define IMPLEMENT_POINTER_ICMP(OP) \
+ case Type::PointerTyID: \
+ Dest.Int1Val = (void*)(intptr_t)Src1.PointerVal OP \
+ (void*)(intptr_t)Src2.PointerVal; break
+
+static GenericValue executeICMP_EQ(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
GenericValue Dest;
- switch (Ty->getPrimitiveID()) {
- IMPLEMENT_BINARY_OPERATOR(+, UByte);
- IMPLEMENT_BINARY_OPERATOR(+, SByte);
- IMPLEMENT_BINARY_OPERATOR(+, UShort);
- IMPLEMENT_BINARY_OPERATOR(+, Short);
- IMPLEMENT_BINARY_OPERATOR(+, UInt);
- IMPLEMENT_BINARY_OPERATOR(+, Int);
- IMPLEMENT_BINARY_OPERATOR(+, ULong);
- IMPLEMENT_BINARY_OPERATOR(+, Long);
- IMPLEMENT_BINARY_OPERATOR(+, Float);
- IMPLEMENT_BINARY_OPERATOR(+, Double);
- IMPLEMENT_BINARY_OPERATOR(+, Pointer);
+ switch (Ty->getTypeID()) {
+ IMPLEMENT_UNSIGNED_ICMP(==, Ty);
+ IMPLEMENT_POINTER_ICMP(==);
default:
- cout << "Unhandled type for Add instruction: " << Ty << "\n";
+ cerr << "Unhandled type for ICMP_EQ predicate: " << *Ty << "\n";
+ abort();
}
return Dest;
}
-static GenericValue executeSubInst(GenericValue Src1, GenericValue Src2,
- const Type *Ty, ExecutionContext &SF) {
+static GenericValue executeICMP_NE(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
GenericValue Dest;
- switch (Ty->getPrimitiveID()) {
- IMPLEMENT_BINARY_OPERATOR(-, UByte);
- IMPLEMENT_BINARY_OPERATOR(-, SByte);
- IMPLEMENT_BINARY_OPERATOR(-, UShort);
- IMPLEMENT_BINARY_OPERATOR(-, Short);
- IMPLEMENT_BINARY_OPERATOR(-, UInt);
- IMPLEMENT_BINARY_OPERATOR(-, Int);
- IMPLEMENT_BINARY_OPERATOR(-, ULong);
- IMPLEMENT_BINARY_OPERATOR(-, Long);
- IMPLEMENT_BINARY_OPERATOR(-, Float);
- IMPLEMENT_BINARY_OPERATOR(-, Double);
- IMPLEMENT_BINARY_OPERATOR(-, Pointer);
+ switch (Ty->getTypeID()) {
+ IMPLEMENT_UNSIGNED_ICMP(!=, Ty);
+ IMPLEMENT_POINTER_ICMP(!=);
default:
- cout << "Unhandled type for Sub instruction: " << Ty << "\n";
+ cerr << "Unhandled type for ICMP_NE predicate: " << *Ty << "\n";
+ abort();
}
return Dest;
}
-static GenericValue executeMulInst(GenericValue Src1, GenericValue Src2,
- const Type *Ty, ExecutionContext &SF) {
+static GenericValue executeICMP_ULT(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
GenericValue Dest;
- switch (Ty->getPrimitiveID()) {
- IMPLEMENT_BINARY_OPERATOR(*, UByte);
- IMPLEMENT_BINARY_OPERATOR(*, SByte);
- IMPLEMENT_BINARY_OPERATOR(*, UShort);
- IMPLEMENT_BINARY_OPERATOR(*, Short);
- IMPLEMENT_BINARY_OPERATOR(*, UInt);
- IMPLEMENT_BINARY_OPERATOR(*, Int);
- IMPLEMENT_BINARY_OPERATOR(*, ULong);
- IMPLEMENT_BINARY_OPERATOR(*, Long);
- IMPLEMENT_BINARY_OPERATOR(*, Float);
- IMPLEMENT_BINARY_OPERATOR(*, Double);
- IMPLEMENT_BINARY_OPERATOR(*, Pointer);
+ switch (Ty->getTypeID()) {
+ IMPLEMENT_UNSIGNED_ICMP(<, Ty);
+ IMPLEMENT_POINTER_ICMP(<);
default:
- cout << "Unhandled type for Mul instruction: " << Ty << "\n";
+ cerr << "Unhandled type for ICMP_ULT predicate: " << *Ty << "\n";
+ abort();
}
return Dest;
}
-static GenericValue executeDivInst(GenericValue Src1, GenericValue Src2,
- const Type *Ty, ExecutionContext &SF) {
+static GenericValue executeICMP_SLT(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
GenericValue Dest;
- switch (Ty->getPrimitiveID()) {
- IMPLEMENT_BINARY_OPERATOR(/, UByte);
- IMPLEMENT_BINARY_OPERATOR(/, SByte);
- IMPLEMENT_BINARY_OPERATOR(/, UShort);
- IMPLEMENT_BINARY_OPERATOR(/, Short);
- IMPLEMENT_BINARY_OPERATOR(/, UInt);
- IMPLEMENT_BINARY_OPERATOR(/, Int);
- IMPLEMENT_BINARY_OPERATOR(/, ULong);
- IMPLEMENT_BINARY_OPERATOR(/, Long);
- IMPLEMENT_BINARY_OPERATOR(/, Float);
- IMPLEMENT_BINARY_OPERATOR(/, Double);
- IMPLEMENT_BINARY_OPERATOR(/, Pointer);
+ switch (Ty->getTypeID()) {
+ IMPLEMENT_SIGNED_ICMP(<, Ty);
+ IMPLEMENT_POINTER_ICMP(<);
default:
- cout << "Unhandled type for Div instruction: " << Ty << "\n";
+ cerr << "Unhandled type for ICMP_SLT predicate: " << *Ty << "\n";
+ abort();
}
return Dest;
}
-static GenericValue executeRemInst(GenericValue Src1, GenericValue Src2,
- const Type *Ty, ExecutionContext &SF) {
+static GenericValue executeICMP_UGT(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
GenericValue Dest;
- switch (Ty->getPrimitiveID()) {
- IMPLEMENT_BINARY_OPERATOR(%, UByte);
- IMPLEMENT_BINARY_OPERATOR(%, SByte);
- IMPLEMENT_BINARY_OPERATOR(%, UShort);
- IMPLEMENT_BINARY_OPERATOR(%, Short);
- IMPLEMENT_BINARY_OPERATOR(%, UInt);
- IMPLEMENT_BINARY_OPERATOR(%, Int);
- IMPLEMENT_BINARY_OPERATOR(%, ULong);
- IMPLEMENT_BINARY_OPERATOR(%, Long);
- IMPLEMENT_BINARY_OPERATOR(%, Pointer);
- case Type::FloatTyID:
- Dest.FloatVal = fmod(Src1.FloatVal, Src2.FloatVal);
- break;
- case Type::DoubleTyID:
- Dest.DoubleVal = fmod(Src1.DoubleVal, Src2.DoubleVal);
- break;
+ switch (Ty->getTypeID()) {
+ IMPLEMENT_UNSIGNED_ICMP(>, Ty);
+ IMPLEMENT_POINTER_ICMP(>);
default:
- cout << "Unhandled type for Rem instruction: " << Ty << "\n";
+ cerr << "Unhandled type for ICMP_UGT predicate: " << *Ty << "\n";
+ abort();
}
return Dest;
}
-static GenericValue executeAndInst(GenericValue Src1, GenericValue Src2,
- const Type *Ty, ExecutionContext &SF) {
+static GenericValue executeICMP_SGT(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
GenericValue Dest;
- switch (Ty->getPrimitiveID()) {
- IMPLEMENT_BINARY_OPERATOR(&, UByte);
- IMPLEMENT_BINARY_OPERATOR(&, SByte);
- IMPLEMENT_BINARY_OPERATOR(&, UShort);
- IMPLEMENT_BINARY_OPERATOR(&, Short);
- IMPLEMENT_BINARY_OPERATOR(&, UInt);
- IMPLEMENT_BINARY_OPERATOR(&, Int);
- IMPLEMENT_BINARY_OPERATOR(&, ULong);
- IMPLEMENT_BINARY_OPERATOR(&, Long);
- IMPLEMENT_BINARY_OPERATOR(&, Pointer);
+ switch (Ty->getTypeID()) {
+ IMPLEMENT_SIGNED_ICMP(>, Ty);
+ IMPLEMENT_POINTER_ICMP(>);
default:
- cout << "Unhandled type for And instruction: " << Ty << "\n";
+ cerr << "Unhandled type for ICMP_SGT predicate: " << *Ty << "\n";
+ abort();
}
return Dest;
}
+static GenericValue executeICMP_ULE(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ switch (Ty->getTypeID()) {
+ IMPLEMENT_UNSIGNED_ICMP(<=, Ty);
+ IMPLEMENT_POINTER_ICMP(<=);
+ default:
+ cerr << "Unhandled type for ICMP_ULE predicate: " << *Ty << "\n";
+ abort();
+ }
+ return Dest;
+}
-static GenericValue executeOrInst(GenericValue Src1, GenericValue Src2,
- const Type *Ty, ExecutionContext &SF) {
+static GenericValue executeICMP_SLE(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
GenericValue Dest;
- switch (Ty->getPrimitiveID()) {
- IMPLEMENT_BINARY_OPERATOR(|, UByte);
- IMPLEMENT_BINARY_OPERATOR(|, SByte);
- IMPLEMENT_BINARY_OPERATOR(|, UShort);
- IMPLEMENT_BINARY_OPERATOR(|, Short);
- IMPLEMENT_BINARY_OPERATOR(|, UInt);
- IMPLEMENT_BINARY_OPERATOR(|, Int);
- IMPLEMENT_BINARY_OPERATOR(|, ULong);
- IMPLEMENT_BINARY_OPERATOR(|, Long);
- IMPLEMENT_BINARY_OPERATOR(|, Pointer);
+ switch (Ty->getTypeID()) {
+ IMPLEMENT_SIGNED_ICMP(<=, Ty);
+ IMPLEMENT_POINTER_ICMP(<=);
default:
- cout << "Unhandled type for Or instruction: " << Ty << "\n";
+ cerr << "Unhandled type for ICMP_SLE predicate: " << *Ty << "\n";
+ abort();
}
return Dest;
}
+static GenericValue executeICMP_UGE(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ switch (Ty->getTypeID()) {
+ IMPLEMENT_UNSIGNED_ICMP(>=,Ty);
+ IMPLEMENT_POINTER_ICMP(>=);
+ default:
+ cerr << "Unhandled type for ICMP_UGE predicate: " << *Ty << "\n";
+ abort();
+ }
+ return Dest;
+}
-static GenericValue executeXorInst(GenericValue Src1, GenericValue Src2,
- const Type *Ty, ExecutionContext &SF) {
+static GenericValue executeICMP_SGE(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
GenericValue Dest;
- switch (Ty->getPrimitiveID()) {
- IMPLEMENT_BINARY_OPERATOR(^, UByte);
- IMPLEMENT_BINARY_OPERATOR(^, SByte);
- IMPLEMENT_BINARY_OPERATOR(^, UShort);
- IMPLEMENT_BINARY_OPERATOR(^, Short);
- IMPLEMENT_BINARY_OPERATOR(^, UInt);
- IMPLEMENT_BINARY_OPERATOR(^, Int);
- IMPLEMENT_BINARY_OPERATOR(^, ULong);
- IMPLEMENT_BINARY_OPERATOR(^, Long);
- IMPLEMENT_BINARY_OPERATOR(^, Pointer);
+ switch (Ty->getTypeID()) {
+ IMPLEMENT_SIGNED_ICMP(>=, Ty);
+ IMPLEMENT_POINTER_ICMP(>=);
default:
- cout << "Unhandled type for Xor instruction: " << Ty << "\n";
+ cerr << "Unhandled type for ICMP_SGE predicate: " << *Ty << "\n";
+ abort();
}
return Dest;
}
+void Interpreter::visitICmpInst(ICmpInst &I) {
+ ExecutionContext &SF = ECStack.back();
+ const Type *Ty = I.getOperand(0)->getType();
+ GenericValue Src1 = getOperandValue(I.getOperand(0), SF);
+ GenericValue Src2 = getOperandValue(I.getOperand(1), SF);
+ GenericValue R; // Result
+
+ switch (I.getPredicate()) {
+ case ICmpInst::ICMP_EQ: R = executeICMP_EQ(Src1, Src2, Ty); break;
+ case ICmpInst::ICMP_NE: R = executeICMP_NE(Src1, Src2, Ty); break;
+ case ICmpInst::ICMP_ULT: R = executeICMP_ULT(Src1, Src2, Ty); break;
+ case ICmpInst::ICMP_SLT: R = executeICMP_SLT(Src1, Src2, Ty); break;
+ case ICmpInst::ICMP_UGT: R = executeICMP_UGT(Src1, Src2, Ty); break;
+ case ICmpInst::ICMP_SGT: R = executeICMP_SGT(Src1, Src2, Ty); break;
+ case ICmpInst::ICMP_ULE: R = executeICMP_ULE(Src1, Src2, Ty); break;
+ case ICmpInst::ICMP_SLE: R = executeICMP_SLE(Src1, Src2, Ty); break;
+ case ICmpInst::ICMP_UGE: R = executeICMP_UGE(Src1, Src2, Ty); break;
+ case ICmpInst::ICMP_SGE: R = executeICMP_SGE(Src1, Src2, Ty); break;
+ default:
+ cerr << "Don't know how to handle this ICmp predicate!\n-->" << I;
+ abort();
+ }
+
+ SetValue(&I, R, SF);
+}
-#define IMPLEMENT_SETCC(OP, TY) \
- case Type::TY##TyID: Dest.BoolVal = Src1.TY##Val OP Src2.TY##Val; break
+#define IMPLEMENT_FCMP(OP, TY) \
+ case Type::TY##TyID: Dest.Int1Val = Src1.TY##Val OP Src2.TY##Val; break
-static GenericValue executeSetEQInst(GenericValue Src1, GenericValue Src2,
- const Type *Ty, ExecutionContext &SF) {
+static GenericValue executeFCMP_OEQ(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
GenericValue Dest;
- switch (Ty->getPrimitiveID()) {
- IMPLEMENT_SETCC(==, UByte);
- IMPLEMENT_SETCC(==, SByte);
- IMPLEMENT_SETCC(==, UShort);
- IMPLEMENT_SETCC(==, Short);
- IMPLEMENT_SETCC(==, UInt);
- IMPLEMENT_SETCC(==, Int);
- IMPLEMENT_SETCC(==, ULong);
- IMPLEMENT_SETCC(==, Long);
- IMPLEMENT_SETCC(==, Float);
- IMPLEMENT_SETCC(==, Double);
- IMPLEMENT_SETCC(==, Pointer);
+ switch (Ty->getTypeID()) {
+ IMPLEMENT_FCMP(==, Float);
+ IMPLEMENT_FCMP(==, Double);
default:
- cout << "Unhandled type for SetEQ instruction: " << Ty << "\n";
+ cerr << "Unhandled type for FCmp EQ instruction: " << *Ty << "\n";
+ abort();
}
return Dest;
}
-static GenericValue executeSetNEInst(GenericValue Src1, GenericValue Src2,
- const Type *Ty, ExecutionContext &SF) {
+static GenericValue executeFCMP_ONE(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
GenericValue Dest;
- switch (Ty->getPrimitiveID()) {
- IMPLEMENT_SETCC(!=, UByte);
- IMPLEMENT_SETCC(!=, SByte);
- IMPLEMENT_SETCC(!=, UShort);
- IMPLEMENT_SETCC(!=, Short);
- IMPLEMENT_SETCC(!=, UInt);
- IMPLEMENT_SETCC(!=, Int);
- IMPLEMENT_SETCC(!=, ULong);
- IMPLEMENT_SETCC(!=, Long);
- IMPLEMENT_SETCC(!=, Float);
- IMPLEMENT_SETCC(!=, Double);
- IMPLEMENT_SETCC(!=, Pointer);
+ switch (Ty->getTypeID()) {
+ IMPLEMENT_FCMP(!=, Float);
+ IMPLEMENT_FCMP(!=, Double);
default:
- cout << "Unhandled type for SetNE instruction: " << Ty << "\n";
+ cerr << "Unhandled type for FCmp NE instruction: " << *Ty << "\n";
+ abort();
}
return Dest;
}
-static GenericValue executeSetLEInst(GenericValue Src1, GenericValue Src2,
- const Type *Ty, ExecutionContext &SF) {
+static GenericValue executeFCMP_OLE(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
GenericValue Dest;
- switch (Ty->getPrimitiveID()) {
- IMPLEMENT_SETCC(<=, UByte);
- IMPLEMENT_SETCC(<=, SByte);
- IMPLEMENT_SETCC(<=, UShort);
- IMPLEMENT_SETCC(<=, Short);
- IMPLEMENT_SETCC(<=, UInt);
- IMPLEMENT_SETCC(<=, Int);
- IMPLEMENT_SETCC(<=, ULong);
- IMPLEMENT_SETCC(<=, Long);
- IMPLEMENT_SETCC(<=, Float);
- IMPLEMENT_SETCC(<=, Double);
- IMPLEMENT_SETCC(<=, Pointer);
+ switch (Ty->getTypeID()) {
+ IMPLEMENT_FCMP(<=, Float);
+ IMPLEMENT_FCMP(<=, Double);
default:
- cout << "Unhandled type for SetLE instruction: " << Ty << "\n";
+ cerr << "Unhandled type for FCmp LE instruction: " << *Ty << "\n";
+ abort();
}
return Dest;
}
-static GenericValue executeSetGEInst(GenericValue Src1, GenericValue Src2,
- const Type *Ty, ExecutionContext &SF) {
+static GenericValue executeFCMP_OGE(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
GenericValue Dest;
- switch (Ty->getPrimitiveID()) {
- IMPLEMENT_SETCC(>=, UByte);
- IMPLEMENT_SETCC(>=, SByte);
- IMPLEMENT_SETCC(>=, UShort);
- IMPLEMENT_SETCC(>=, Short);
- IMPLEMENT_SETCC(>=, UInt);
- IMPLEMENT_SETCC(>=, Int);
- IMPLEMENT_SETCC(>=, ULong);
- IMPLEMENT_SETCC(>=, Long);
- IMPLEMENT_SETCC(>=, Float);
- IMPLEMENT_SETCC(>=, Double);
- IMPLEMENT_SETCC(>=, Pointer);
+ switch (Ty->getTypeID()) {
+ IMPLEMENT_FCMP(>=, Float);
+ IMPLEMENT_FCMP(>=, Double);
default:
- cout << "Unhandled type for SetGE instruction: " << Ty << "\n";
+ cerr << "Unhandled type for FCmp GE instruction: " << *Ty << "\n";
+ abort();
}
return Dest;
}
-static GenericValue executeSetLTInst(GenericValue Src1, GenericValue Src2,
- const Type *Ty, ExecutionContext &SF) {
+static GenericValue executeFCMP_OLT(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
GenericValue Dest;
- switch (Ty->getPrimitiveID()) {
- IMPLEMENT_SETCC(<, UByte);
- IMPLEMENT_SETCC(<, SByte);
- IMPLEMENT_SETCC(<, UShort);
- IMPLEMENT_SETCC(<, Short);
- IMPLEMENT_SETCC(<, UInt);
- IMPLEMENT_SETCC(<, Int);
- IMPLEMENT_SETCC(<, ULong);
- IMPLEMENT_SETCC(<, Long);
- IMPLEMENT_SETCC(<, Float);
- IMPLEMENT_SETCC(<, Double);
- IMPLEMENT_SETCC(<, Pointer);
+ switch (Ty->getTypeID()) {
+ IMPLEMENT_FCMP(<, Float);
+ IMPLEMENT_FCMP(<, Double);
default:
- cout << "Unhandled type for SetLT instruction: " << Ty << "\n";
+ cerr << "Unhandled type for FCmp LT instruction: " << *Ty << "\n";
+ abort();
}
return Dest;
}
-static GenericValue executeSetGTInst(GenericValue Src1, GenericValue Src2,
- const Type *Ty, ExecutionContext &SF) {
+static GenericValue executeFCMP_OGT(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
GenericValue Dest;
- switch (Ty->getPrimitiveID()) {
- IMPLEMENT_SETCC(>, UByte);
- IMPLEMENT_SETCC(>, SByte);
- IMPLEMENT_SETCC(>, UShort);
- IMPLEMENT_SETCC(>, Short);
- IMPLEMENT_SETCC(>, UInt);
- IMPLEMENT_SETCC(>, Int);
- IMPLEMENT_SETCC(>, ULong);
- IMPLEMENT_SETCC(>, Long);
- IMPLEMENT_SETCC(>, Float);
- IMPLEMENT_SETCC(>, Double);
- IMPLEMENT_SETCC(>, Pointer);
+ switch (Ty->getTypeID()) {
+ IMPLEMENT_FCMP(>, Float);
+ IMPLEMENT_FCMP(>, Double);
default:
- cout << "Unhandled type for SetGT instruction: " << Ty << "\n";
+ cerr << "Unhandled type for FCmp GT instruction: " << *Ty << "\n";
+ abort();
}
return Dest;
}
-static void executeBinaryInst(BinaryOperator &I, ExecutionContext &SF) {
+#define IMPLEMENT_UNORDERED(TY, X,Y) \
+ if (TY == Type::FloatTy) \
+ if (X.FloatVal != X.FloatVal || Y.FloatVal != Y.FloatVal) { \
+ Dest.Int1Val = true; \
+ return Dest; \
+ } \
+ else if (X.DoubleVal != X.DoubleVal || Y.DoubleVal != Y.DoubleVal) { \
+ Dest.Int1Val = true; \
+ return Dest; \
+ }
+
+
+static GenericValue executeFCMP_UEQ(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ IMPLEMENT_UNORDERED(Ty, Src1, Src2)
+ return executeFCMP_OEQ(Src1, Src2, Ty);
+}
+
+static GenericValue executeFCMP_UNE(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ IMPLEMENT_UNORDERED(Ty, Src1, Src2)
+ return executeFCMP_ONE(Src1, Src2, Ty);
+}
+
+static GenericValue executeFCMP_ULE(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ IMPLEMENT_UNORDERED(Ty, Src1, Src2)
+ return executeFCMP_OLE(Src1, Src2, Ty);
+}
+
+static GenericValue executeFCMP_UGE(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ IMPLEMENT_UNORDERED(Ty, Src1, Src2)
+ return executeFCMP_OGE(Src1, Src2, Ty);
+}
+
+static GenericValue executeFCMP_ULT(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ IMPLEMENT_UNORDERED(Ty, Src1, Src2)
+ return executeFCMP_OLT(Src1, Src2, Ty);
+}
+
+static GenericValue executeFCMP_UGT(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ IMPLEMENT_UNORDERED(Ty, Src1, Src2)
+ return executeFCMP_OGT(Src1, Src2, Ty);
+}
+
+static GenericValue executeFCMP_ORD(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ if (Ty == Type::FloatTy)
+ Dest.Int1Val = (Src1.FloatVal == Src1.FloatVal &&
+ Src2.FloatVal == Src2.FloatVal);
+ else
+ Dest.Int1Val = (Src1.DoubleVal == Src1.DoubleVal &&
+ Src2.DoubleVal == Src2.DoubleVal);
+ return Dest;
+}
+
+static GenericValue executeFCMP_UNO(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ if (Ty == Type::FloatTy)
+ Dest.Int1Val = (Src1.FloatVal != Src1.FloatVal ||
+ Src2.FloatVal != Src2.FloatVal);
+ else
+ Dest.Int1Val = (Src1.DoubleVal != Src1.DoubleVal ||
+ Src2.DoubleVal != Src2.DoubleVal);
+ return Dest;
+}
+
+void Interpreter::visitFCmpInst(FCmpInst &I) {
+ ExecutionContext &SF = ECStack.back();
+ const Type *Ty = I.getOperand(0)->getType();
+ GenericValue Src1 = getOperandValue(I.getOperand(0), SF);
+ GenericValue Src2 = getOperandValue(I.getOperand(1), SF);
+ GenericValue R; // Result
+
+ switch (I.getPredicate()) {
+ case FCmpInst::FCMP_FALSE: R.Int1Val = false; break;
+ case FCmpInst::FCMP_TRUE: R.Int1Val = true; break;
+ case FCmpInst::FCMP_ORD: R = executeFCMP_ORD(Src1, Src2, Ty); break;
+ case FCmpInst::FCMP_UNO: R = executeFCMP_UNO(Src1, Src2, Ty); break;
+ case FCmpInst::FCMP_UEQ: R = executeFCMP_UEQ(Src1, Src2, Ty); break;
+ case FCmpInst::FCMP_OEQ: R = executeFCMP_OEQ(Src1, Src2, Ty); break;
+ case FCmpInst::FCMP_UNE: R = executeFCMP_UNE(Src1, Src2, Ty); break;
+ case FCmpInst::FCMP_ONE: R = executeFCMP_ONE(Src1, Src2, Ty); break;
+ case FCmpInst::FCMP_ULT: R = executeFCMP_ULT(Src1, Src2, Ty); break;
+ case FCmpInst::FCMP_OLT: R = executeFCMP_OLT(Src1, Src2, Ty); break;
+ case FCmpInst::FCMP_UGT: R = executeFCMP_UGT(Src1, Src2, Ty); break;
+ case FCmpInst::FCMP_OGT: R = executeFCMP_OGT(Src1, Src2, Ty); break;
+ case FCmpInst::FCMP_ULE: R = executeFCMP_ULE(Src1, Src2, Ty); break;
+ case FCmpInst::FCMP_OLE: R = executeFCMP_OLE(Src1, Src2, Ty); break;
+ case FCmpInst::FCMP_UGE: R = executeFCMP_UGE(Src1, Src2, Ty); break;
+ case FCmpInst::FCMP_OGE: R = executeFCMP_OGE(Src1, Src2, Ty); break;
+ default:
+ cerr << "Don't know how to handle this FCmp predicate!\n-->" << I;
+ abort();
+ }
+
+ SetValue(&I, R, SF);
+}
+
+static GenericValue executeCmpInst(unsigned predicate, GenericValue Src1,
+ GenericValue Src2, const Type *Ty) {
+ GenericValue Result;
+ switch (predicate) {
+ case ICmpInst::ICMP_EQ: return executeICMP_EQ(Src1, Src2, Ty);
+ case ICmpInst::ICMP_NE: return executeICMP_NE(Src1, Src2, Ty);
+ case ICmpInst::ICMP_UGT: return executeICMP_UGT(Src1, Src2, Ty);
+ case ICmpInst::ICMP_SGT: return executeICMP_SGT(Src1, Src2, Ty);
+ case ICmpInst::ICMP_ULT: return executeICMP_ULT(Src1, Src2, Ty);
+ case ICmpInst::ICMP_SLT: return executeICMP_SLT(Src1, Src2, Ty);
+ case ICmpInst::ICMP_UGE: return executeICMP_UGE(Src1, Src2, Ty);
+ case ICmpInst::ICMP_SGE: return executeICMP_SGE(Src1, Src2, Ty);
+ case ICmpInst::ICMP_ULE: return executeICMP_ULE(Src1, Src2, Ty);
+ case ICmpInst::ICMP_SLE: return executeICMP_SLE(Src1, Src2, Ty);
+ case FCmpInst::FCMP_ORD: return executeFCMP_ORD(Src1, Src2, Ty);
+ case FCmpInst::FCMP_UNO: return executeFCMP_UNO(Src1, Src2, Ty);
+ case FCmpInst::FCMP_OEQ: return executeFCMP_OEQ(Src1, Src2, Ty);
+ case FCmpInst::FCMP_UEQ: return executeFCMP_UEQ(Src1, Src2, Ty);
+ case FCmpInst::FCMP_ONE: return executeFCMP_ONE(Src1, Src2, Ty);
+ case FCmpInst::FCMP_UNE: return executeFCMP_UNE(Src1, Src2, Ty);
+ case FCmpInst::FCMP_OLT: return executeFCMP_OLT(Src1, Src2, Ty);
+ case FCmpInst::FCMP_ULT: return executeFCMP_ULT(Src1, Src2, Ty);
+ case FCmpInst::FCMP_OGT: return executeFCMP_OGT(Src1, Src2, Ty);
+ case FCmpInst::FCMP_UGT: return executeFCMP_UGT(Src1, Src2, Ty);
+ case FCmpInst::FCMP_OLE: return executeFCMP_OLE(Src1, Src2, Ty);
+ case FCmpInst::FCMP_ULE: return executeFCMP_ULE(Src1, Src2, Ty);
+ case FCmpInst::FCMP_OGE: return executeFCMP_OGE(Src1, Src2, Ty);
+ case FCmpInst::FCMP_UGE: return executeFCMP_UGE(Src1, Src2, Ty);
+ case FCmpInst::FCMP_FALSE: {
+ GenericValue Result;
+ Result.Int1Val = false;
+ return Result;
+ }
+ case FCmpInst::FCMP_TRUE: {
+ GenericValue Result;
+ Result.Int1Val = true;
+ return Result;
+ }
+ default:
+ cerr << "Unhandled Cmp predicate\n";
+ abort();
+ }
+}
+
+void Interpreter::visitBinaryOperator(BinaryOperator &I) {
+ ExecutionContext &SF = ECStack.back();
const Type *Ty = I.getOperand(0)->getType();
GenericValue Src1 = getOperandValue(I.getOperand(0), SF);
GenericValue Src2 = getOperandValue(I.getOperand(1), SF);
GenericValue R; // Result
switch (I.getOpcode()) {
- case Instruction::Add: R = executeAddInst (Src1, Src2, Ty, SF); break;
- case Instruction::Sub: R = executeSubInst (Src1, Src2, Ty, SF); break;
- case Instruction::Mul: R = executeMulInst (Src1, Src2, Ty, SF); break;
- case Instruction::Div: R = executeDivInst (Src1, Src2, Ty, SF); break;
- case Instruction::Rem: R = executeRemInst (Src1, Src2, Ty, SF); break;
- case Instruction::And: R = executeAndInst (Src1, Src2, Ty, SF); break;
- case Instruction::Or: R = executeOrInst (Src1, Src2, Ty, SF); break;
- case Instruction::Xor: R = executeXorInst (Src1, Src2, Ty, SF); break;
- case Instruction::SetEQ: R = executeSetEQInst(Src1, Src2, Ty, SF); break;
- case Instruction::SetNE: R = executeSetNEInst(Src1, Src2, Ty, SF); break;
- case Instruction::SetLE: R = executeSetLEInst(Src1, Src2, Ty, SF); break;
- case Instruction::SetGE: R = executeSetGEInst(Src1, Src2, Ty, SF); break;
- case Instruction::SetLT: R = executeSetLTInst(Src1, Src2, Ty, SF); break;
- case Instruction::SetGT: R = executeSetGTInst(Src1, Src2, Ty, SF); break;
+ case Instruction::Add: R = executeAddInst (Src1, Src2, Ty); break;
+ case Instruction::Sub: R = executeSubInst (Src1, Src2, Ty); break;
+ case Instruction::Mul: R = executeMulInst (Src1, Src2, Ty); break;
+ case Instruction::UDiv: R = executeUDivInst (Src1, Src2, Ty); break;
+ case Instruction::SDiv: R = executeSDivInst (Src1, Src2, Ty); break;
+ case Instruction::FDiv: R = executeFDivInst (Src1, Src2, Ty); break;
+ case Instruction::URem: R = executeURemInst (Src1, Src2, Ty); break;
+ case Instruction::SRem: R = executeSRemInst (Src1, Src2, Ty); break;
+ case Instruction::FRem: R = executeFRemInst (Src1, Src2, Ty); break;
+ case Instruction::And: R = executeAndInst (Src1, Src2, Ty); break;
+ case Instruction::Or: R = executeOrInst (Src1, Src2, Ty); break;
+ case Instruction::Xor: R = executeXorInst (Src1, Src2, Ty); break;
default:
- cout << "Don't know how to handle this binary operator!\n-->" << I;
- R = Src1;
+ cerr << "Don't know how to handle this binary operator!\n-->" << I;
+ abort();
}
SetValue(&I, R, SF);
}
+static GenericValue executeSelectInst(GenericValue Src1, GenericValue Src2,
+ GenericValue Src3) {
+ return Src1.Int1Val ? Src2 : Src3;
+}
+
+void Interpreter::visitSelectInst(SelectInst &I) {
+ ExecutionContext &SF = ECStack.back();
+ GenericValue Src1 = getOperandValue(I.getOperand(0), SF);
+ GenericValue Src2 = getOperandValue(I.getOperand(1), SF);
+ GenericValue Src3 = getOperandValue(I.getOperand(2), SF);
+ GenericValue R = executeSelectInst(Src1, Src2, Src3);
+ SetValue(&I, R, SF);
+}
+
+
//===----------------------------------------------------------------------===//
// Terminator Instruction Implementations
//===----------------------------------------------------------------------===//
-static void PerformExitStuff() {
-#ifdef PROFILE_STRUCTURE_FIELDS
- // Print out structure field accounting information...
- if (!FieldAccessCounts.empty()) {
- CW << "Profile Field Access Counts:\n";
- std::map<const StructType *, vector<unsigned> >::iterator
- I = FieldAccessCounts.begin(), E = FieldAccessCounts.end();
- for (; I != E; ++I) {
- vector<unsigned> &OfC = I->second;
- CW << " '" << (Value*)I->first << "'\t- Sum=";
-
- unsigned Sum = 0;
- for (unsigned i = 0; i < OfC.size(); ++i)
- Sum += OfC[i];
- CW << Sum << " - ";
-
- for (unsigned i = 0; i < OfC.size(); ++i) {
- if (i) CW << ", ";
- CW << OfC[i];
- }
- CW << "\n";
- }
- CW << "\n";
-
- CW << "Profile Field Access Percentages:\n";
- cout.precision(3);
- for (I = FieldAccessCounts.begin(); I != E; ++I) {
- vector<unsigned> &OfC = I->second;
- unsigned Sum = 0;
- for (unsigned i = 0; i < OfC.size(); ++i)
- Sum += OfC[i];
-
- CW << " '" << (Value*)I->first << "'\t- ";
- for (unsigned i = 0; i < OfC.size(); ++i) {
- if (i) CW << ", ";
- CW << double(OfC[i])/Sum;
- }
- CW << "\n";
- }
- CW << "\n";
-
- FieldAccessCounts.clear();
- }
-#endif
+void Interpreter::exitCalled(GenericValue GV) {
+ // runAtExitHandlers() assumes there are no stack frames, but
+ // if exit() was called, then it had a stack frame. Blow away
+ // the stack before interpreting atexit handlers.
+ ECStack.clear ();
+ runAtExitHandlers ();
+ exit (GV.Int32Val);
}
-void Interpreter::exitCalled(GenericValue GV) {
- if (!QuietMode) {
- cout << "Program returned ";
- print(Type::IntTy, GV);
- cout << " via 'void exit(int)'\n";
- }
+/// Pop the last stack frame off of ECStack and then copy the result
+/// back into the result variable if we are not returning void. The
+/// result variable may be the ExitValue, or the Value of the calling
+/// CallInst if there was a previous stack frame. This method may
+/// invalidate any ECStack iterators you have. This method also takes
+/// care of switching to the normal destination BB, if we are returning
+/// from an invoke.
+///
+void Interpreter::popStackAndReturnValueToCaller (const Type *RetTy,
+ GenericValue Result) {
+ // Pop the current stack frame.
+ ECStack.pop_back();
- ExitCode = GV.SByteVal;
- ECStack.clear();
- PerformExitStuff();
+ if (ECStack.empty()) { // Finished main. Put result into exit code...
+ if (RetTy && RetTy->isInteger()) { // Nonvoid return type?
+ ExitValue = Result; // Capture the exit value of the program
+ } else {
+ memset(&ExitValue, 0, sizeof(ExitValue));
+ }
+ } else {
+ // If we have a previous stack frame, and we have a previous call,
+ // fill in the return value...
+ ExecutionContext &CallingSF = ECStack.back();
+ if (Instruction *I = CallingSF.Caller.getInstruction()) {
+ if (CallingSF.Caller.getType() != Type::VoidTy) // Save result...
+ SetValue(I, Result, CallingSF);
+ if (InvokeInst *II = dyn_cast<InvokeInst> (I))
+ SwitchToNewBasicBlock (II->getNormalDest (), CallingSF);
+ CallingSF.Caller = CallSite(); // We returned from the call...
+ }
+ }
}
-void Interpreter::executeRetInst(ReturnInst &I, ExecutionContext &SF) {
- const Type *RetTy = 0;
+void Interpreter::visitReturnInst(ReturnInst &I) {
+ ExecutionContext &SF = ECStack.back();
+ const Type *RetTy = Type::VoidTy;
GenericValue Result;
// Save away the return value... (if we are not 'ret void')
Result = getOperandValue(I.getReturnValue(), SF);
}
- // Save previously executing meth
- const Function *M = ECStack.back().CurMethod;
-
- // Pop the current stack frame... this invalidates SF
- ECStack.pop_back();
-
- if (ECStack.empty()) { // Finished main. Put result into exit code...
- if (RetTy) { // Nonvoid return type?
- if (!QuietMode) {
- CW << "Function " << M->getType() << " \"" << M->getName()
- << "\" returned ";
- print(RetTy, Result);
- cout << "\n";
- }
-
- if (RetTy->isIntegral())
- ExitCode = Result.IntVal; // Capture the exit code of the program
- } else {
- ExitCode = 0;
- }
+ popStackAndReturnValueToCaller(RetTy, Result);
+}
- PerformExitStuff();
- return;
- }
+void Interpreter::visitUnwindInst(UnwindInst &I) {
+ // Unwind stack
+ Instruction *Inst;
+ do {
+ ECStack.pop_back ();
+ if (ECStack.empty ())
+ abort ();
+ Inst = ECStack.back ().Caller.getInstruction ();
+ } while (!(Inst && isa<InvokeInst> (Inst)));
+
+ // Return from invoke
+ ExecutionContext &InvokingSF = ECStack.back ();
+ InvokingSF.Caller = CallSite ();
+
+ // Go to exceptional destination BB of invoke instruction
+ SwitchToNewBasicBlock(cast<InvokeInst>(Inst)->getUnwindDest(), InvokingSF);
+}
- // If we have a previous stack frame, and we have a previous call, fill in
- // the return value...
- //
- ExecutionContext &NewSF = ECStack.back();
- if (NewSF.Caller) {
- if (NewSF.Caller->getType() != Type::VoidTy) // Save result...
- SetValue(NewSF.Caller, Result, NewSF);
-
- NewSF.Caller = 0; // We returned from the call...
- } else if (!QuietMode) {
- // This must be a function that is executing because of a user 'call'
- // instruction.
- CW << "Function " << M->getType() << " \"" << M->getName()
- << "\" returned ";
- print(RetTy, Result);
- cout << "\n";
- }
+void Interpreter::visitUnreachableInst(UnreachableInst &I) {
+ cerr << "ERROR: Program executed an 'unreachable' instruction!\n";
+ abort();
}
-void Interpreter::executeBrInst(BranchInst &I, ExecutionContext &SF) {
- SF.PrevBB = SF.CurBB; // Update PrevBB so that PHI nodes work...
+void Interpreter::visitBranchInst(BranchInst &I) {
+ ExecutionContext &SF = ECStack.back();
BasicBlock *Dest;
Dest = I.getSuccessor(0); // Uncond branches have a fixed dest...
if (!I.isUnconditional()) {
Value *Cond = I.getCondition();
- GenericValue CondVal = getOperandValue(Cond, SF);
- if (CondVal.BoolVal == 0) // If false cond...
- Dest = I.getSuccessor(1);
+ if (getOperandValue(Cond, SF).Int1Val == 0) // If false cond...
+ Dest = I.getSuccessor(1);
}
+ SwitchToNewBasicBlock(Dest, SF);
+}
+
+void Interpreter::visitSwitchInst(SwitchInst &I) {
+ ExecutionContext &SF = ECStack.back();
+ GenericValue CondVal = getOperandValue(I.getOperand(0), SF);
+ const Type *ElTy = I.getOperand(0)->getType();
+
+ // Check to see if any of the cases match...
+ BasicBlock *Dest = 0;
+ for (unsigned i = 2, e = I.getNumOperands(); i != e; i += 2)
+ if (executeICMP_EQ(CondVal,
+ getOperandValue(I.getOperand(i), SF), ElTy).Int1Val) {
+ Dest = cast<BasicBlock>(I.getOperand(i+1));
+ break;
+ }
+
+ if (!Dest) Dest = I.getDefaultDest(); // No cases matched: use default
+ SwitchToNewBasicBlock(Dest, SF);
+}
+
+// SwitchToNewBasicBlock - This method is used to jump to a new basic block.
+// This function handles the actual updating of block and instruction iterators
+// as well as execution of all of the PHI nodes in the destination block.
+//
+// This method does this because all of the PHI nodes must be executed
+// atomically, reading their inputs before any of the results are updated. Not
+// doing this can cause problems if the PHI nodes depend on other PHI nodes for
+// their inputs. If the input PHI node is updated before it is read, incorrect
+// results can happen. Thus we use a two phase approach.
+//
+void Interpreter::SwitchToNewBasicBlock(BasicBlock *Dest, ExecutionContext &SF){
+ BasicBlock *PrevBB = SF.CurBB; // Remember where we came from...
SF.CurBB = Dest; // Update CurBB to branch destination
SF.CurInst = SF.CurBB->begin(); // Update new instruction ptr...
+
+ if (!isa<PHINode>(SF.CurInst)) return; // Nothing fancy to do
+
+ // Loop over all of the PHI nodes in the current block, reading their inputs.
+ std::vector<GenericValue> ResultValues;
+
+ for (; PHINode *PN = dyn_cast<PHINode>(SF.CurInst); ++SF.CurInst) {
+ // Search for the value corresponding to this previous bb...
+ int i = PN->getBasicBlockIndex(PrevBB);
+ assert(i != -1 && "PHINode doesn't contain entry for predecessor??");
+ Value *IncomingValue = PN->getIncomingValue(i);
+
+ // Save the incoming value for this PHI node...
+ ResultValues.push_back(getOperandValue(IncomingValue, SF));
+ }
+
+ // Now loop over all of the PHI nodes setting their values...
+ SF.CurInst = SF.CurBB->begin();
+ for (unsigned i = 0; isa<PHINode>(SF.CurInst); ++SF.CurInst, ++i) {
+ PHINode *PN = cast<PHINode>(SF.CurInst);
+ SetValue(PN, ResultValues[i], SF);
+ }
}
//===----------------------------------------------------------------------===//
// Memory Instruction Implementations
//===----------------------------------------------------------------------===//
-void Interpreter::executeAllocInst(AllocationInst &I, ExecutionContext &SF) {
+void Interpreter::visitAllocationInst(AllocationInst &I) {
+ ExecutionContext &SF = ECStack.back();
+
const Type *Ty = I.getType()->getElementType(); // Type to be allocated
// Get the number of elements being allocated by the array...
- unsigned NumElements = getOperandValue(I.getOperand(0), SF).UIntVal;
+ unsigned NumElements = getOperandValue(I.getOperand(0), SF).Int32Val;
// Allocate enough memory to hold the type...
- // FIXME: Don't use CALLOC, use a tainted malloc.
- void *Memory = calloc(NumElements, TD.getTypeSize(Ty));
+ void *Memory = malloc(NumElements * (size_t)TD.getTypeSize(Ty));
- GenericValue Result;
- Result.PointerVal = (PointerTy)Memory;
+ GenericValue Result = PTOGV(Memory);
assert(Result.PointerVal != 0 && "Null pointer returned by malloc!");
SetValue(&I, Result, SF);
ECStack.back().Allocas.add(Memory);
}
-static void executeFreeInst(FreeInst &I, ExecutionContext &SF) {
+void Interpreter::visitFreeInst(FreeInst &I) {
+ ExecutionContext &SF = ECStack.back();
assert(isa<PointerType>(I.getOperand(0)->getType()) && "Freeing nonptr?");
GenericValue Value = getOperandValue(I.getOperand(0), SF);
// TODO: Check to make sure memory is allocated
- free((void*)Value.PointerVal); // Free memory
+ free(GVTOP(Value)); // Free memory
}
-
// getElementOffset - The workhorse for getelementptr.
//
-static GenericValue executeGEPOperation(Value *Ptr, User::op_iterator I,
- User::op_iterator E,
- ExecutionContext &SF) {
+GenericValue Interpreter::executeGEPOperation(Value *Ptr, gep_type_iterator I,
+ gep_type_iterator E,
+ ExecutionContext &SF) {
assert(isa<PointerType>(Ptr->getType()) &&
"Cannot getElementOffset of a nonpointer type!");
PointerTy Total = 0;
- const Type *Ty = Ptr->getType();
for (; I != E; ++I) {
- if (const StructType *STy = dyn_cast<StructType>(Ty)) {
+ if (const StructType *STy = dyn_cast<StructType>(*I)) {
const StructLayout *SLO = TD.getStructLayout(STy);
-
- // Indicies must be ubyte constants...
- const ConstantUInt *CPU = cast<ConstantUInt>(*I);
- assert(CPU->getType() == Type::UByteTy);
- unsigned Index = CPU->getValue();
-
-#ifdef PROFILE_STRUCTURE_FIELDS
- if (ProfileStructureFields) {
- // Do accounting for this field...
- vector<unsigned> &OfC = FieldAccessCounts[STy];
- if (OfC.size() == 0) OfC.resize(STy->getElementTypes().size());
- OfC[Index]++;
- }
-#endif
-
- Total += SLO->MemberOffsets[Index];
- Ty = STy->getElementTypes()[Index];
- } else if (const SequentialType *ST = cast<SequentialType>(Ty)) {
-
- // Get the index number for the array... which must be uint type...
- assert((*I)->getType() == Type::LongTy);
- unsigned Idx = getOperandValue(*I, SF).UIntVal;
- if (const ArrayType *AT = dyn_cast<ArrayType>(ST))
- if (Idx >= AT->getNumElements() && ArrayChecksEnabled) {
- cerr << "Out of range memory access to element #" << Idx
- << " of a " << AT->getNumElements() << " element array."
- << " Subscript #" << *I << "\n";
- // Get outta here!!!
- siglongjmp(SignalRecoverBuffer, SIGTRAP);
- }
-
- Ty = ST->getElementType();
- unsigned Size = TD.getTypeSize(Ty);
- Total += Size*Idx;
- }
+
+ const ConstantInt *CPU = cast<ConstantInt>(I.getOperand());
+ unsigned Index = unsigned(CPU->getZExtValue());
+
+ Total += (PointerTy)SLO->MemberOffsets[Index];
+ } else {
+ const SequentialType *ST = cast<SequentialType>(*I);
+ // Get the index number for the array... which must be long type...
+ GenericValue IdxGV = getOperandValue(I.getOperand(), SF);
+
+ int64_t Idx;
+ unsigned BitWidth =
+ cast<IntegerType>(I.getOperand()->getType())->getBitWidth();
+ if (BitWidth == 32)
+ Idx = (int64_t)(int32_t)IdxGV.Int32Val;
+ else if (BitWidth == 64)
+ Idx = (int64_t)IdxGV.Int64Val;
+ else
+ assert(0 && "Invalid index type for getelementptr");
+ Total += PointerTy(TD.getTypeSize(ST->getElementType())*Idx);
+ }
}
GenericValue Result;
return Result;
}
-static void executeGEPInst(GetElementPtrInst &I, ExecutionContext &SF) {
- SetValue(&I, executeGEPOperation(I.getPointerOperand(),
- I.idx_begin(), I.idx_end(), SF), SF);
+void Interpreter::visitGetElementPtrInst(GetElementPtrInst &I) {
+ ExecutionContext &SF = ECStack.back();
+ SetValue(&I, TheEE->executeGEPOperation(I.getPointerOperand(),
+ gep_type_begin(I), gep_type_end(I), SF), SF);
}
-static void executeLoadInst(LoadInst &I, ExecutionContext &SF) {
+void Interpreter::visitLoadInst(LoadInst &I) {
+ ExecutionContext &SF = ECStack.back();
GenericValue SRC = getOperandValue(I.getPointerOperand(), SF);
- GenericValue *Ptr = (GenericValue*)SRC.PointerVal;
- GenericValue Result;
-
- switch (I.getType()->getPrimitiveID()) {
- case Type::BoolTyID:
- case Type::UByteTyID:
- case Type::SByteTyID: Result.SByteVal = Ptr->SByteVal; break;
- case Type::UShortTyID:
- case Type::ShortTyID: Result.ShortVal = Ptr->ShortVal; break;
- case Type::UIntTyID:
- case Type::IntTyID: Result.IntVal = Ptr->IntVal; break;
- case Type::ULongTyID:
- case Type::LongTyID: Result.ULongVal = Ptr->ULongVal; break;
- case Type::PointerTyID: Result.PointerVal = Ptr->PointerVal; break;
- case Type::FloatTyID: Result.FloatVal = Ptr->FloatVal; break;
- case Type::DoubleTyID: Result.DoubleVal = Ptr->DoubleVal; break;
- default:
- cout << "Cannot load value of type " << I.getType() << "!\n";
- }
-
+ GenericValue *Ptr = (GenericValue*)GVTOP(SRC);
+ GenericValue Result = LoadValueFromMemory(Ptr, I.getType());
SetValue(&I, Result, SF);
}
-static void executeStoreInst(StoreInst &I, ExecutionContext &SF) {
- GenericValue SRC = getOperandValue(I.getPointerOperand(), SF);
- GenericValue *Ptr = (GenericValue *)SRC.PointerVal;
+void Interpreter::visitStoreInst(StoreInst &I) {
+ ExecutionContext &SF = ECStack.back();
GenericValue Val = getOperandValue(I.getOperand(0), SF);
-
- switch (I.getOperand(0)->getType()->getPrimitiveID()) {
- case Type::BoolTyID:
- case Type::UByteTyID:
- case Type::SByteTyID: Ptr->SByteVal = Val.SByteVal; break;
- case Type::UShortTyID:
- case Type::ShortTyID: Ptr->ShortVal = Val.ShortVal; break;
- case Type::UIntTyID:
- case Type::IntTyID: Ptr->IntVal = Val.IntVal; break;
- case Type::ULongTyID:
- case Type::LongTyID: Ptr->LongVal = Val.LongVal; break;
- case Type::PointerTyID: Ptr->PointerVal = Val.PointerVal; break;
- case Type::FloatTyID: Ptr->FloatVal = Val.FloatVal; break;
- case Type::DoubleTyID: Ptr->DoubleVal = Val.DoubleVal; break;
- default:
- cout << "Cannot store value of type " << I.getType() << "!\n";
- }
+ GenericValue SRC = getOperandValue(I.getPointerOperand(), SF);
+ StoreValueToMemory(Val, (GenericValue *)GVTOP(SRC),
+ I.getOperand(0)->getType());
}
-
//===----------------------------------------------------------------------===//
// Miscellaneous Instruction Implementations
//===----------------------------------------------------------------------===//
-void Interpreter::executeCallInst(CallInst &I, ExecutionContext &SF) {
- ECStack.back().Caller = &I;
- vector<GenericValue> ArgVals;
- ArgVals.reserve(I.getNumOperands()-1);
- for (unsigned i = 1; i < I.getNumOperands(); ++i)
- ArgVals.push_back(getOperandValue(I.getOperand(i), SF));
+void Interpreter::visitCallSite(CallSite CS) {
+ ExecutionContext &SF = ECStack.back();
+
+ // Check to see if this is an intrinsic function call...
+ if (Function *F = CS.getCalledFunction())
+ if (F->isExternal ())
+ switch (F->getIntrinsicID()) {
+ case Intrinsic::not_intrinsic:
+ break;
+ case Intrinsic::vastart: { // va_start
+ GenericValue ArgIndex;
+ ArgIndex.UIntPairVal.first = ECStack.size() - 1;
+ ArgIndex.UIntPairVal.second = 0;
+ SetValue(CS.getInstruction(), ArgIndex, SF);
+ return;
+ }
+ case Intrinsic::vaend: // va_end is a noop for the interpreter
+ return;
+ case Intrinsic::vacopy: // va_copy: dest = src
+ SetValue(CS.getInstruction(), getOperandValue(*CS.arg_begin(), SF), SF);
+ return;
+ default:
+ // If it is an unknown intrinsic function, use the intrinsic lowering
+ // class to transform it into hopefully tasty LLVM code.
+ //
+ Instruction *Prev = CS.getInstruction()->getPrev();
+ BasicBlock *Parent = CS.getInstruction()->getParent();
+ IL->LowerIntrinsicCall(cast<CallInst>(CS.getInstruction()));
+
+ // Restore the CurInst pointer to the first instruction newly inserted, if
+ // any.
+ if (!Prev) {
+ SF.CurInst = Parent->begin();
+ } else {
+ SF.CurInst = Prev;
+ ++SF.CurInst;
+ }
+ return;
+ }
+
+ SF.Caller = CS;
+ std::vector<GenericValue> ArgVals;
+ const unsigned NumArgs = SF.Caller.arg_size();
+ ArgVals.reserve(NumArgs);
+ for (CallSite::arg_iterator i = SF.Caller.arg_begin(),
+ e = SF.Caller.arg_end(); i != e; ++i) {
+ Value *V = *i;
+ ArgVals.push_back(getOperandValue(V, SF));
+ // Promote all integral types whose size is < sizeof(int) into ints. We do
+ // this by zero or sign extending the value as appropriate according to the
+ // source type.
+ const Type *Ty = V->getType();
+ if (Ty->isInteger()) {
+ if (Ty->getPrimitiveSizeInBits() == 1)
+ ArgVals.back().Int32Val = ArgVals.back().Int1Val;
+ else if (Ty->getPrimitiveSizeInBits() <= 8)
+ ArgVals.back().Int32Val = ArgVals.back().Int8Val;
+ else if (Ty->getPrimitiveSizeInBits() <= 16)
+ ArgVals.back().Int32Val = ArgVals.back().Int16Val;
+ }
+ }
- // To handle indirect calls, we must get the pointer value from the argument
+ // To handle indirect calls, we must get the pointer value from the argument
// and treat it as a function pointer.
- GenericValue SRC = getOperandValue(I.getCalledValue(), SF);
-
- callMethod((Function*)SRC.PointerVal, ArgVals);
+ GenericValue SRC = getOperandValue(SF.Caller.getCalledValue(), SF);
+ callFunction((Function*)GVTOP(SRC), ArgVals);
}
-static void executePHINode(PHINode &I, ExecutionContext &SF) {
- BasicBlock *PrevBB = SF.PrevBB;
- Value *IncomingValue = 0;
-
- // Search for the value corresponding to this previous bb...
- for (unsigned i = I.getNumIncomingValues(); i > 0;) {
- if (I.getIncomingBlock(--i) == PrevBB) {
- IncomingValue = I.getIncomingValue(i);
- break;
+static GenericValue executeShlInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ if (const IntegerType *ITy = cast<IntegerType>(Ty)) {
+ unsigned BitWidth = ITy->getBitWidth();
+ if (BitWidth <= 8)
+ Dest.Int8Val = ((uint8_t)Src1.Int8Val) << ((uint32_t)Src2.Int8Val);
+ else if (BitWidth <= 16)
+ Dest.Int16Val = ((uint16_t)Src1.Int16Val) << ((uint32_t)Src2.Int8Val);
+ else if (BitWidth <= 32)
+ Dest.Int32Val = ((uint32_t)Src1.Int32Val) << ((uint32_t)Src2.Int8Val);
+ else if (BitWidth <= 64)
+ Dest.Int64Val = ((uint64_t)Src1.Int64Val) << ((uint32_t)Src2.Int8Val);
+ else {
+ cerr << "Integer types > 64 bits not supported: " << *Ty << "\n";
+ abort();
}
+ maskToBitWidth(Dest, BitWidth);
+ } else {
+ cerr << "Unhandled type for Shl instruction: " << *Ty << "\n";
+ abort();
}
- assert(IncomingValue && "No PHI node predecessor for current PrevBB!");
+ return Dest;
+}
- // Found the value, set as the result...
- SetValue(&I, getOperandValue(IncomingValue, SF), SF);
+static GenericValue executeLShrInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ if (const IntegerType *ITy = cast<IntegerType>(Ty)) {
+ unsigned BitWidth = ITy->getBitWidth();
+ if (BitWidth <= 8)
+ Dest.Int8Val = ((uint8_t)Src1.Int8Val) >> ((uint32_t)Src2.Int8Val);
+ else if (BitWidth <= 16)
+ Dest.Int16Val = ((uint16_t)Src1.Int16Val) >> ((uint32_t)Src2.Int8Val);
+ else if (BitWidth <= 32)
+ Dest.Int32Val = ((uint32_t)Src1.Int32Val) >> ((uint32_t)Src2.Int8Val);
+ else if (BitWidth <= 64)
+ Dest.Int64Val = ((uint64_t)Src1.Int64Val) >> ((uint32_t)Src2.Int8Val);
+ else {
+ cerr << "Integer types > 64 bits not supported: " << *Ty << "\n";
+ abort();
+ }
+ maskToBitWidth(Dest, BitWidth);
+ } else {
+ cerr << "Unhandled type for LShr instruction: " << *Ty << "\n";
+ abort();
+ }
+ return Dest;
}
-#define IMPLEMENT_SHIFT(OP, TY) \
- case Type::TY##TyID: Dest.TY##Val = Src1.TY##Val OP Src2.UByteVal; break
+static GenericValue executeAShrInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ if (const IntegerType *ITy = cast<IntegerType>(Ty)) {
+ unsigned BitWidth = ITy->getBitWidth();
+ if (BitWidth <= 8)
+ Dest.Int8Val = ((int8_t)Src1.Int8Val) >> ((int32_t)Src2.Int8Val);
+ else if (BitWidth <= 16)
+ Dest.Int16Val = ((int16_t)Src1.Int16Val) >> ((int32_t)Src2.Int8Val);
+ else if (BitWidth <= 32)
+ Dest.Int32Val = ((int32_t)Src1.Int32Val) >> ((int32_t)Src2.Int8Val);
+ else if (BitWidth <= 64)
+ Dest.Int64Val = ((int64_t)Src1.Int64Val) >> ((int32_t)Src2.Int8Val);
+ else {
+ cerr << "Integer types > 64 bits not supported: " << *Ty << "\n"; \
+ abort();
+ }
+ maskToBitWidth(Dest, BitWidth);
+ } else {
+ cerr << "Unhandled type for AShr instruction: " << *Ty << "\n";
+ abort();
+ }
+ return Dest;
+}
-static void executeShlInst(ShiftInst &I, ExecutionContext &SF) {
+void Interpreter::visitShl(ShiftInst &I) {
+ ExecutionContext &SF = ECStack.back();
const Type *Ty = I.getOperand(0)->getType();
GenericValue Src1 = getOperandValue(I.getOperand(0), SF);
GenericValue Src2 = getOperandValue(I.getOperand(1), SF);
GenericValue Dest;
-
- switch (Ty->getPrimitiveID()) {
- IMPLEMENT_SHIFT(<<, UByte);
- IMPLEMENT_SHIFT(<<, SByte);
- IMPLEMENT_SHIFT(<<, UShort);
- IMPLEMENT_SHIFT(<<, Short);
- IMPLEMENT_SHIFT(<<, UInt);
- IMPLEMENT_SHIFT(<<, Int);
- IMPLEMENT_SHIFT(<<, ULong);
- IMPLEMENT_SHIFT(<<, Long);
- IMPLEMENT_SHIFT(<<, Pointer);
- default:
- cout << "Unhandled type for Shl instruction: " << Ty << "\n";
- }
+ Dest = executeShlInst (Src1, Src2, Ty);
SetValue(&I, Dest, SF);
}
-static void executeShrInst(ShiftInst &I, ExecutionContext &SF) {
+void Interpreter::visitLShr(ShiftInst &I) {
+ ExecutionContext &SF = ECStack.back();
const Type *Ty = I.getOperand(0)->getType();
GenericValue Src1 = getOperandValue(I.getOperand(0), SF);
GenericValue Src2 = getOperandValue(I.getOperand(1), SF);
GenericValue Dest;
-
- switch (Ty->getPrimitiveID()) {
- IMPLEMENT_SHIFT(>>, UByte);
- IMPLEMENT_SHIFT(>>, SByte);
- IMPLEMENT_SHIFT(>>, UShort);
- IMPLEMENT_SHIFT(>>, Short);
- IMPLEMENT_SHIFT(>>, UInt);
- IMPLEMENT_SHIFT(>>, Int);
- IMPLEMENT_SHIFT(>>, ULong);
- IMPLEMENT_SHIFT(>>, Long);
- IMPLEMENT_SHIFT(>>, Pointer);
- default:
- cout << "Unhandled type for Shr instruction: " << Ty << "\n";
- }
+ Dest = executeLShrInst (Src1, Src2, Ty);
SetValue(&I, Dest, SF);
}
-#define IMPLEMENT_CAST(DTY, DCTY, STY) \
- case Type::STY##TyID: Dest.DTY##Val = DCTY Src.STY##Val; break;
-
-#define IMPLEMENT_CAST_CASE_START(DESTTY, DESTCTY) \
- case Type::DESTTY##TyID: \
- switch (SrcTy->getPrimitiveID()) { \
- IMPLEMENT_CAST(DESTTY, DESTCTY, Bool); \
- IMPLEMENT_CAST(DESTTY, DESTCTY, UByte); \
- IMPLEMENT_CAST(DESTTY, DESTCTY, SByte); \
- IMPLEMENT_CAST(DESTTY, DESTCTY, UShort); \
- IMPLEMENT_CAST(DESTTY, DESTCTY, Short); \
- IMPLEMENT_CAST(DESTTY, DESTCTY, UInt); \
- IMPLEMENT_CAST(DESTTY, DESTCTY, Int); \
- IMPLEMENT_CAST(DESTTY, DESTCTY, ULong); \
- IMPLEMENT_CAST(DESTTY, DESTCTY, Long); \
- IMPLEMENT_CAST(DESTTY, DESTCTY, Pointer);
-
-#define IMPLEMENT_CAST_CASE_FP_IMP(DESTTY, DESTCTY) \
- IMPLEMENT_CAST(DESTTY, DESTCTY, Float); \
- IMPLEMENT_CAST(DESTTY, DESTCTY, Double)
-
-#define IMPLEMENT_CAST_CASE_END() \
- default: cout << "Unhandled cast: " << SrcTy << " to " << Ty << "\n"; \
- break; \
- } \
- break
-
-#define IMPLEMENT_CAST_CASE(DESTTY, DESTCTY) \
- IMPLEMENT_CAST_CASE_START(DESTTY, DESTCTY); \
- IMPLEMENT_CAST_CASE_FP_IMP(DESTTY, DESTCTY); \
- IMPLEMENT_CAST_CASE_END()
-
-static GenericValue executeCastOperation(Value *SrcVal, const Type *Ty,
- ExecutionContext &SF) {
- const Type *SrcTy = SrcVal->getType();
- GenericValue Dest, Src = getOperandValue(SrcVal, SF);
+void Interpreter::visitAShr(ShiftInst &I) {
+ ExecutionContext &SF = ECStack.back();
+ const Type *Ty = I.getOperand(0)->getType();
+ GenericValue Src1 = getOperandValue(I.getOperand(0), SF);
+ GenericValue Src2 = getOperandValue(I.getOperand(1), SF);
+ GenericValue Dest;
+ Dest = executeAShrInst (Src1, Src2, Ty);
+ SetValue(&I, Dest, SF);
+}
- switch (Ty->getPrimitiveID()) {
- IMPLEMENT_CAST_CASE(UByte , (unsigned char));
- IMPLEMENT_CAST_CASE(SByte , ( signed char));
- IMPLEMENT_CAST_CASE(UShort , (unsigned short));
- IMPLEMENT_CAST_CASE(Short , ( signed short));
- IMPLEMENT_CAST_CASE(UInt , (unsigned int ));
- IMPLEMENT_CAST_CASE(Int , ( signed int ));
- IMPLEMENT_CAST_CASE(ULong , (uint64_t));
- IMPLEMENT_CAST_CASE(Long , ( int64_t));
- IMPLEMENT_CAST_CASE(Pointer, (PointerTy)(uint32_t));
- IMPLEMENT_CAST_CASE(Float , (float));
- IMPLEMENT_CAST_CASE(Double , (double));
- default:
- cout << "Unhandled dest type for cast instruction: " << Ty << "\n";
+#define INTEGER_ASSIGN(DEST, BITWIDTH, VAL) \
+ { \
+ uint64_t Mask = (1ull << BITWIDTH) - 1; \
+ if (BITWIDTH == 1) { \
+ Dest.Int1Val = (bool) (VAL & Mask); \
+ } else if (BITWIDTH <= 8) { \
+ Dest.Int8Val = (uint8_t) (VAL & Mask); \
+ } else if (BITWIDTH <= 16) { \
+ Dest.Int16Val = (uint16_t) (VAL & Mask); \
+ } else if (BITWIDTH <= 32) { \
+ Dest.Int32Val = (uint32_t) (VAL & Mask); \
+ } else \
+ Dest.Int64Val = (uint64_t) (VAL & Mask); \
}
+GenericValue Interpreter::executeTruncInst(Value *SrcVal, const Type *DstTy,
+ ExecutionContext &SF) {
+ const Type *SrcTy = SrcVal->getType();
+ GenericValue Dest, Src = getOperandValue(SrcVal, SF);
+ const IntegerType *DITy = cast<IntegerType>(DstTy);
+ const IntegerType *SITy = cast<IntegerType>(SrcTy);
+ unsigned DBitWidth = DITy->getBitWidth();
+ unsigned SBitWidth = SITy->getBitWidth();
+ assert(SBitWidth <= 64 && DBitWidth <= 64 &&
+ "Integer types > 64 bits not supported");
+ assert(SBitWidth > DBitWidth && "Invalid truncate");
+
+ // Mask the source value to its actual bit width. This ensures that any
+ // high order bits are cleared.
+ uint64_t Mask = (1ULL << DBitWidth) - 1;
+ uint64_t MaskedVal = 0;
+ if (SBitWidth <= 8)
+ MaskedVal = Src.Int8Val & Mask;
+ else if (SBitWidth <= 16)
+ MaskedVal = Src.Int16Val & Mask;
+ else if (SBitWidth <= 32)
+ MaskedVal = Src.Int32Val & Mask;
+ else
+ MaskedVal = Src.Int64Val & Mask;
+
+ INTEGER_ASSIGN(Dest, DBitWidth, MaskedVal);
return Dest;
}
-
-static void executeCastInst(CastInst &I, ExecutionContext &SF) {
- SetValue(&I, executeCastOperation(I.getOperand(0), I.getType(), SF), SF);
+GenericValue Interpreter::executeSExtInst(Value *SrcVal, const Type *DstTy,
+ ExecutionContext &SF) {
+ const Type *SrcTy = SrcVal->getType();
+ GenericValue Dest, Src = getOperandValue(SrcVal, SF);
+ const IntegerType *DITy = cast<IntegerType>(DstTy);
+ const IntegerType *SITy = cast<IntegerType>(SrcTy);
+ unsigned DBitWidth = DITy->getBitWidth();
+ unsigned SBitWidth = SITy->getBitWidth();
+ assert(SBitWidth <= 64 && DBitWidth <= 64 &&
+ "Integer types > 64 bits not supported");
+ assert(SBitWidth < DBitWidth && "Invalid sign extend");
+
+ // Normalize to a 64-bit value.
+ uint64_t Normalized = 0;
+ if (SBitWidth <= 8)
+ Normalized = Src.Int8Val;
+ else if (SBitWidth <= 16)
+ Normalized = Src.Int16Val;
+ else if (SBitWidth <= 32)
+ Normalized = Src.Int32Val;
+ else
+ Normalized = Src.Int64Val;
+
+ // Now do the bit-accurate sign extension manually.
+ bool isSigned = (Normalized & (1 << (SBitWidth-1))) != 0;
+ if (isSigned)
+ Normalized |= ~SITy->getBitMask();
+
+ // Now that we have a sign extended value, assign it to the destination
+ INTEGER_ASSIGN(Dest, DBitWidth, Normalized);
+ return Dest;
}
-
-//===----------------------------------------------------------------------===//
-// Dispatch and Execution Code
-//===----------------------------------------------------------------------===//
-
-MethodInfo::MethodInfo(Function *F) : Annotation(MethodInfoAID) {
- // Assign slot numbers to the function arguments...
- for (Function::const_aiterator AI = F->abegin(), E = F->aend(); AI != E; ++AI)
- AI->addAnnotation(new SlotNumber(getValueSlot(AI)));
-
- // Iterate over all of the instructions...
- unsigned InstNum = 0;
- for (Function::iterator BB = F->begin(), BBE = F->end(); BB != BBE; ++BB)
- for (BasicBlock::iterator II = BB->begin(), IE = BB->end(); II != IE; ++II)
- // For each instruction... Add Annote
- II->addAnnotation(new InstNumber(++InstNum, getValueSlot(II)));
+GenericValue Interpreter::executeZExtInst(Value *SrcVal, const Type *DstTy,
+ ExecutionContext &SF) {
+ const Type *SrcTy = SrcVal->getType();
+ GenericValue Dest, Src = getOperandValue(SrcVal, SF);
+ const IntegerType *DITy = cast<IntegerType>(DstTy);
+ const IntegerType *SITy = cast<IntegerType>(SrcTy);
+ unsigned DBitWidth = DITy->getBitWidth();
+ unsigned SBitWidth = SITy->getBitWidth();
+ assert(SBitWidth <= 64 && DBitWidth <= 64 &&
+ "Integer types > 64 bits not supported");
+ assert(SBitWidth < DBitWidth && "Invalid sign extend");
+ uint64_t Extended = 0;
+ if (SBitWidth == 1)
+ // For sign extension from bool, we must extend the source bits.
+ Extended = (uint64_t) (Src.Int1Val & 1);
+ else if (SBitWidth <= 8)
+ Extended = (uint64_t) (uint8_t)Src.Int8Val;
+ else if (SBitWidth <= 16)
+ Extended = (uint64_t) (uint16_t)Src.Int16Val;
+ else if (SBitWidth <= 32)
+ Extended = (uint64_t) (uint32_t)Src.Int32Val;
+ else
+ Extended = (uint64_t) Src.Int64Val;
+
+ // Now that we have a sign extended value, assign it to the destination
+ INTEGER_ASSIGN(Dest, DBitWidth, Extended);
+ return Dest;
}
-unsigned MethodInfo::getValueSlot(const Value *V) {
- unsigned Plane = V->getType()->getUniqueID();
- if (Plane >= NumPlaneElements.size())
- NumPlaneElements.resize(Plane+1, 0);
- return NumPlaneElements[Plane]++;
+GenericValue Interpreter::executeFPTruncInst(Value *SrcVal, const Type *DstTy,
+ ExecutionContext &SF) {
+ const Type *SrcTy = SrcVal->getType();
+ GenericValue Dest, Src = getOperandValue(SrcVal, SF);
+ assert(SrcTy == Type::DoubleTy && DstTy == Type::FloatTy &&
+ "Invalid FPTrunc instruction");
+ Dest.FloatVal = (float) Src.DoubleVal;
+ return Dest;
}
+GenericValue Interpreter::executeFPExtInst(Value *SrcVal, const Type *DstTy,
+ ExecutionContext &SF) {
+ const Type *SrcTy = SrcVal->getType();
+ GenericValue Dest, Src = getOperandValue(SrcVal, SF);
+ assert(SrcTy == Type::FloatTy && DstTy == Type::DoubleTy &&
+ "Invalid FPTrunc instruction");
+ Dest.DoubleVal = (double) Src.FloatVal;
+ return Dest;
+}
-//===----------------------------------------------------------------------===//
-// callMethod - Execute the specified function...
-//
-void Interpreter::callMethod(Function *M, const vector<GenericValue> &ArgVals) {
- assert((ECStack.empty() || ECStack.back().Caller == 0 ||
- ECStack.back().Caller->getNumOperands()-1 == ArgVals.size()) &&
- "Incorrect number of arguments passed into function call!");
- if (M->isExternal()) {
- GenericValue Result = callExternalMethod(M, ArgVals);
- const Type *RetTy = M->getReturnType();
-
- // Copy the result back into the result variable if we are not returning
- // void.
- if (RetTy != Type::VoidTy) {
- if (!ECStack.empty() && ECStack.back().Caller) {
- ExecutionContext &SF = ECStack.back();
- SetValue(SF.Caller, Result, SF);
-
- SF.Caller = 0; // We returned from the call...
- } else if (!QuietMode) {
- // print it.
- CW << "Function " << M->getType() << " \"" << M->getName()
- << "\" returned ";
- print(RetTy, Result);
- cout << "\n";
-
- if (RetTy->isIntegral())
- ExitCode = Result.IntVal; // Capture the exit code of the program
- }
- }
-
- return;
- }
-
- // Process the function, assigning instruction numbers to the instructions in
- // the function. Also calculate the number of values for each type slot
- // active.
- //
- MethodInfo *MethInfo = (MethodInfo*)M->getOrCreateAnnotation(MethodInfoAID);
- ECStack.push_back(ExecutionContext()); // Make a new stack frame...
-
- ExecutionContext &StackFrame = ECStack.back(); // Fill it in...
- StackFrame.CurMethod = M;
- StackFrame.CurBB = M->begin();
- StackFrame.CurInst = StackFrame.CurBB->begin();
- StackFrame.MethInfo = MethInfo;
-
- // Initialize the values to nothing...
- StackFrame.Values.resize(MethInfo->NumPlaneElements.size());
- for (unsigned i = 0; i < MethInfo->NumPlaneElements.size(); ++i) {
- StackFrame.Values[i].resize(MethInfo->NumPlaneElements[i]);
+GenericValue Interpreter::executeFPToUIInst(Value *SrcVal, const Type *DstTy,
+ ExecutionContext &SF) {
+ const Type *SrcTy = SrcVal->getType();
+ GenericValue Dest, Src = getOperandValue(SrcVal, SF);
+ const IntegerType *DITy = cast<IntegerType>(DstTy);
+ unsigned DBitWidth = DITy->getBitWidth();
+ assert(DBitWidth <= 64 && "Integer types > 64 bits not supported");
+ assert(SrcTy->isFloatingPoint() && "Invalid FPToUI instruction");
+ uint64_t Converted = 0;
+ if (SrcTy->getTypeID() == Type::FloatTyID)
+ Converted = (uint64_t) Src.FloatVal;
+ else
+ Converted = (uint64_t) Src.DoubleVal;
+
+ INTEGER_ASSIGN(Dest, DBitWidth, Converted);
+ return Dest;
+}
- // Taint the initial values of stuff
- memset(&StackFrame.Values[i][0], 42,
- MethInfo->NumPlaneElements[i]*sizeof(GenericValue));
- }
+GenericValue Interpreter::executeFPToSIInst(Value *SrcVal, const Type *DstTy,
+ ExecutionContext &SF) {
+ const Type *SrcTy = SrcVal->getType();
+ GenericValue Dest, Src = getOperandValue(SrcVal, SF);
+ const IntegerType *DITy = cast<IntegerType>(DstTy);
+ unsigned DBitWidth = DITy->getBitWidth();
+ assert(DBitWidth <= 64 && "Integer types > 64 bits not supported");
+ assert(SrcTy->isFloatingPoint() && "Invalid FPToSI instruction");
+ int64_t Converted = 0;
+ if (SrcTy->getTypeID() == Type::FloatTyID)
+ Converted = (int64_t) Src.FloatVal;
+ else
+ Converted = (int64_t) Src.DoubleVal;
+
+ INTEGER_ASSIGN(Dest, DBitWidth, Converted);
+ return Dest;
+}
- StackFrame.PrevBB = 0; // No previous BB for PHI nodes...
+GenericValue Interpreter::executeUIToFPInst(Value *SrcVal, const Type *DstTy,
+ ExecutionContext &SF) {
+ const Type *SrcTy = SrcVal->getType();
+ GenericValue Dest, Src = getOperandValue(SrcVal, SF);
+ const IntegerType *SITy = cast<IntegerType>(SrcTy);
+ unsigned SBitWidth = SITy->getBitWidth();
+ assert(SBitWidth <= 64 && "Integer types > 64 bits not supported");
+ assert(DstTy->isFloatingPoint() && "Invalid UIToFP instruction");
+ uint64_t Converted = 0;
+ if (SBitWidth == 1)
+ Converted = (uint64_t) Src.Int1Val;
+ else if (SBitWidth <= 8)
+ Converted = (uint64_t) Src.Int8Val;
+ else if (SBitWidth <= 16)
+ Converted = (uint64_t) Src.Int16Val;
+ else if (SBitWidth <= 32)
+ Converted = (uint64_t) Src.Int32Val;
+ else
+ Converted = (uint64_t) Src.Int64Val;
+
+ if (DstTy->getTypeID() == Type::FloatTyID)
+ Dest.FloatVal = (float) Converted;
+ else
+ Dest.DoubleVal = (double) Converted;
+ return Dest;
+}
+GenericValue Interpreter::executeSIToFPInst(Value *SrcVal, const Type *DstTy,
+ ExecutionContext &SF) {
+ const Type *SrcTy = SrcVal->getType();
+ GenericValue Dest, Src = getOperandValue(SrcVal, SF);
+ const IntegerType *SITy = cast<IntegerType>(SrcTy);
+ unsigned SBitWidth = SITy->getBitWidth();
+ assert(SBitWidth <= 64 && "Integer types > 64 bits not supported");
+ assert(DstTy->isFloatingPoint() && "Invalid UIToFP instruction");
+ int64_t Converted = 0;
+ if (SBitWidth == 1)
+ Converted = 0LL - Src.Int1Val;
+ else if (SBitWidth <= 8)
+ Converted = (int64_t) (int8_t)Src.Int8Val;
+ else if (SBitWidth <= 16)
+ Converted = (int64_t) (int16_t)Src.Int16Val;
+ else if (SBitWidth <= 32)
+ Converted = (int64_t) (int32_t)Src.Int32Val;
+ else
+ Converted = (int64_t) Src.Int64Val;
+
+ if (DstTy->getTypeID() == Type::FloatTyID)
+ Dest.FloatVal = (float) Converted;
+ else
+ Dest.DoubleVal = (double) Converted;
+ return Dest;
+}
- // Run through the function arguments and initialize their values...
- assert(ArgVals.size() == M->asize() &&
- "Invalid number of values passed to function invocation!");
- unsigned i = 0;
- for (Function::aiterator AI = M->abegin(), E = M->aend(); AI != E; ++AI, ++i)
- SetValue(AI, ArgVals[i], StackFrame);
+GenericValue Interpreter::executePtrToIntInst(Value *SrcVal, const Type *DstTy,
+ ExecutionContext &SF) {
+ const Type *SrcTy = SrcVal->getType();
+ GenericValue Dest, Src = getOperandValue(SrcVal, SF);
+ const IntegerType *DITy = cast<IntegerType>(DstTy);
+ unsigned DBitWidth = DITy->getBitWidth();
+ assert(DBitWidth <= 64 && "Integer types > 64 bits not supported");
+ assert(isa<PointerType>(SrcTy) && "Invalid PtrToInt instruction");
+ INTEGER_ASSIGN(Dest, DBitWidth, (intptr_t) Src.PointerVal);
+ return Dest;
}
-// executeInstruction - Interpret a single instruction, increment the "PC", and
-// return true if the next instruction is a breakpoint...
-//
-bool Interpreter::executeInstruction() {
- assert(!ECStack.empty() && "No program running, cannot execute inst!");
-
- ExecutionContext &SF = ECStack.back(); // Current stack frame
- Instruction &I = *SF.CurInst++; // Increment before execute
-
- if (Trace)
- CW << "Run:" << I;
-
- // Set a sigsetjmp buffer so that we can recover if an error happens during
- // instruction execution...
- //
- if (int SigNo = sigsetjmp(SignalRecoverBuffer, 1)) {
- --SF.CurInst; // Back up to erroring instruction
- if (SigNo != SIGINT) {
- cout << "EXCEPTION OCCURRED [" << strsignal(SigNo) << "]:\n";
- printStackTrace();
- // If -abort-on-exception was specified, terminate LLI instead of trying
- // to debug it.
- //
- if (AbortOnExceptions) exit(1);
- } else if (SigNo == SIGINT) {
- cout << "CTRL-C Detected, execution halted.\n";
- }
- InInstruction = false;
- return true;
- }
+GenericValue Interpreter::executeIntToPtrInst(Value *SrcVal, const Type *DstTy,
+ ExecutionContext &SF) {
+ const Type *SrcTy = SrcVal->getType();
+ GenericValue Dest, Src = getOperandValue(SrcVal, SF);
+ const IntegerType *SITy = cast<IntegerType>(SrcTy);
+ unsigned SBitWidth = SITy->getBitWidth();
+ assert(SBitWidth <= 64 && "Integer types > 64 bits not supported");
+ assert(isa<PointerType>(DstTy) && "Invalid PtrToInt instruction");
+ uint64_t Converted = 0;
+ if (SBitWidth == 1)
+ Converted = (uint64_t) Src.Int1Val;
+ else if (SBitWidth <= 8)
+ Converted = (uint64_t) Src.Int8Val;
+ else if (SBitWidth <= 16)
+ Converted = (uint64_t) Src.Int16Val;
+ else if (SBitWidth <= 32)
+ Converted = (uint64_t) Src.Int32Val;
+ else
+ Converted = (uint64_t) Src.Int64Val;
+
+ Dest.PointerVal = (PointerTy) Converted;
+ return Dest;
+}
- InInstruction = true;
- if (I.isBinaryOp()) {
- executeBinaryInst(cast<BinaryOperator>(I), SF);
- } else {
- switch (I.getOpcode()) {
- // Terminators
- case Instruction::Ret: executeRetInst (cast<ReturnInst>(I), SF); break;
- case Instruction::Br: executeBrInst (cast<BranchInst>(I), SF); break;
- // Memory Instructions
- case Instruction::Alloca:
- case Instruction::Malloc: executeAllocInst((AllocationInst&)I, SF); break;
- case Instruction::Free: executeFreeInst (cast<FreeInst> (I), SF); break;
- case Instruction::Load: executeLoadInst (cast<LoadInst> (I), SF); break;
- case Instruction::Store: executeStoreInst(cast<StoreInst>(I), SF); break;
- case Instruction::GetElementPtr:
- executeGEPInst(cast<GetElementPtrInst>(I), SF); break;
-
- // Miscellaneous Instructions
- case Instruction::Call: executeCallInst (cast<CallInst> (I), SF); break;
- case Instruction::PHINode: executePHINode (cast<PHINode> (I), SF); break;
- case Instruction::Shl: executeShlInst (cast<ShiftInst>(I), SF); break;
- case Instruction::Shr: executeShrInst (cast<ShiftInst>(I), SF); break;
- case Instruction::Cast: executeCastInst (cast<CastInst> (I), SF); break;
- default:
- cout << "Don't know how to execute this instruction!\n-->" << I;
- }
- }
- InInstruction = false;
+GenericValue Interpreter::executeBitCastInst(Value *SrcVal, const Type *DstTy,
+ ExecutionContext &SF) {
- // Reset the current frame location to the top of stack
- CurFrame = ECStack.size()-1;
-
- if (CurFrame == -1) return false; // No breakpoint if no code
+ const Type *SrcTy = SrcVal->getType();
+ GenericValue Dest, Src = getOperandValue(SrcVal, SF);
+ if (isa<PointerType>(DstTy)) {
+ assert(isa<PointerType>(SrcTy) && "Invalid BitCast");
+ Dest.PointerVal = Src.PointerVal;
+ } else if (DstTy->isInteger()) {
+ const IntegerType *DITy = cast<IntegerType>(DstTy);
+ unsigned DBitWidth = DITy->getBitWidth();
+ if (SrcTy == Type::FloatTy) {
+ Dest.Int32Val = FloatToBits(Src.FloatVal);
+ } else if (SrcTy == Type::DoubleTy) {
+ Dest.Int64Val = DoubleToBits(Src.DoubleVal);
+ } else if (SrcTy->isInteger()) {
+ const IntegerType *SITy = cast<IntegerType>(SrcTy);
+ unsigned SBitWidth = SITy->getBitWidth();
+ assert(SBitWidth <= 64 && "Integer types > 64 bits not supported");
+ assert(SBitWidth == DBitWidth && "Invalid BitCast");
+ if (SBitWidth == 1)
+ Dest.Int1Val = Src.Int1Val;
+ else if (SBitWidth <= 8)
+ Dest.Int8Val = Src.Int8Val;
+ else if (SBitWidth <= 16)
+ Dest.Int16Val = Src.Int16Val;
+ else if (SBitWidth <= 32)
+ Dest.Int32Val = Src.Int32Val;
+ else
+ Dest.Int64Val = Src.Int64Val;
+ maskToBitWidth(Dest, DBitWidth);
+ } else
+ assert(0 && "Invalid BitCast");
+ } else if (DstTy == Type::FloatTy) {
+ if (SrcTy->isInteger())
+ Dest.FloatVal = BitsToFloat(Src.Int32Val);
+ else
+ Dest.FloatVal = Src.FloatVal;
+ } else if (DstTy == Type::DoubleTy) {
+ if (SrcTy->isInteger())
+ Dest.DoubleVal = BitsToDouble(Src.Int64Val);
+ else
+ Dest.DoubleVal = Src.DoubleVal;
+ } else
+ assert(0 && "Invalid Bitcast");
- // Return true if there is a breakpoint annotation on the instruction...
- return ECStack[CurFrame].CurInst->getAnnotation(BreakpointAID) != 0;
+ return Dest;
}
-void Interpreter::stepInstruction() { // Do the 'step' command
- if (ECStack.empty()) {
- cout << "Error: no program running, cannot step!\n";
- return;
- }
-
- // Run an instruction...
- executeInstruction();
-
- // Print the next instruction to execute...
- printCurrentInstruction();
+void Interpreter::visitTruncInst(TruncInst &I) {
+ ExecutionContext &SF = ECStack.back();
+ SetValue(&I, executeTruncInst(I.getOperand(0), I.getType(), SF), SF);
}
-// --- UI Stuff...
-void Interpreter::nextInstruction() { // Do the 'next' command
- if (ECStack.empty()) {
- cout << "Error: no program running, cannot 'next'!\n";
- return;
- }
-
- // If this is a call instruction, step over the call instruction...
- // TODO: ICALL, CALL WITH, ...
- if (ECStack.back().CurInst->getOpcode() == Instruction::Call) {
- unsigned StackSize = ECStack.size();
- // Step into the function...
- if (executeInstruction()) {
- // Hit a breakpoint, print current instruction, then return to user...
- cout << "Breakpoint hit!\n";
- printCurrentInstruction();
- return;
- }
+void Interpreter::visitSExtInst(SExtInst &I) {
+ ExecutionContext &SF = ECStack.back();
+ SetValue(&I, executeSExtInst(I.getOperand(0), I.getType(), SF), SF);
+}
- // If we we able to step into the function, finish it now. We might not be
- // able the step into a function, if it's external for example.
- if (ECStack.size() != StackSize)
- finish(); // Finish executing the function...
- else
- printCurrentInstruction();
+void Interpreter::visitZExtInst(ZExtInst &I) {
+ ExecutionContext &SF = ECStack.back();
+ SetValue(&I, executeZExtInst(I.getOperand(0), I.getType(), SF), SF);
+}
- } else {
- // Normal instruction, just step...
- stepInstruction();
- }
+void Interpreter::visitFPTruncInst(FPTruncInst &I) {
+ ExecutionContext &SF = ECStack.back();
+ SetValue(&I, executeFPTruncInst(I.getOperand(0), I.getType(), SF), SF);
}
-void Interpreter::run() {
- if (ECStack.empty()) {
- cout << "Error: no program running, cannot run!\n";
- return;
- }
+void Interpreter::visitFPExtInst(FPExtInst &I) {
+ ExecutionContext &SF = ECStack.back();
+ SetValue(&I, executeFPExtInst(I.getOperand(0), I.getType(), SF), SF);
+}
- bool HitBreakpoint = false;
- while (!ECStack.empty() && !HitBreakpoint) {
- // Run an instruction...
- HitBreakpoint = executeInstruction();
- }
+void Interpreter::visitUIToFPInst(UIToFPInst &I) {
+ ExecutionContext &SF = ECStack.back();
+ SetValue(&I, executeUIToFPInst(I.getOperand(0), I.getType(), SF), SF);
+}
- if (HitBreakpoint) {
- cout << "Breakpoint hit!\n";
- }
- // Print the next instruction to execute...
- printCurrentInstruction();
+void Interpreter::visitSIToFPInst(SIToFPInst &I) {
+ ExecutionContext &SF = ECStack.back();
+ SetValue(&I, executeSIToFPInst(I.getOperand(0), I.getType(), SF), SF);
}
-void Interpreter::finish() {
- if (ECStack.empty()) {
- cout << "Error: no program running, cannot run!\n";
- return;
- }
+void Interpreter::visitFPToUIInst(FPToUIInst &I) {
+ ExecutionContext &SF = ECStack.back();
+ SetValue(&I, executeFPToUIInst(I.getOperand(0), I.getType(), SF), SF);
+}
- unsigned StackSize = ECStack.size();
- bool HitBreakpoint = false;
- while (ECStack.size() >= StackSize && !HitBreakpoint) {
- // Run an instruction...
- HitBreakpoint = executeInstruction();
- }
+void Interpreter::visitFPToSIInst(FPToSIInst &I) {
+ ExecutionContext &SF = ECStack.back();
+ SetValue(&I, executeFPToSIInst(I.getOperand(0), I.getType(), SF), SF);
+}
- if (HitBreakpoint) {
- cout << "Breakpoint hit!\n";
- }
+void Interpreter::visitPtrToIntInst(PtrToIntInst &I) {
+ ExecutionContext &SF = ECStack.back();
+ SetValue(&I, executePtrToIntInst(I.getOperand(0), I.getType(), SF), SF);
+}
- // Print the next instruction to execute...
- printCurrentInstruction();
+void Interpreter::visitIntToPtrInst(IntToPtrInst &I) {
+ ExecutionContext &SF = ECStack.back();
+ SetValue(&I, executeIntToPtrInst(I.getOperand(0), I.getType(), SF), SF);
}
+void Interpreter::visitBitCastInst(BitCastInst &I) {
+ ExecutionContext &SF = ECStack.back();
+ SetValue(&I, executeBitCastInst(I.getOperand(0), I.getType(), SF), SF);
+}
+#define IMPLEMENT_VAARG(TY) \
+ case Type::TY##TyID: Dest.TY##Val = Src.TY##Val; break
-// printCurrentInstruction - Print out the instruction that the virtual PC is
-// at, or fail silently if no program is running.
-//
-void Interpreter::printCurrentInstruction() {
- if (!ECStack.empty()) {
- if (ECStack.back().CurBB->begin() == ECStack.back().CurInst) // print label
- WriteAsOperand(cout, ECStack.back().CurBB) << ":\n";
-
- Instruction &I = *ECStack.back().CurInst;
- InstNumber *IN = (InstNumber*)I.getAnnotation(SlotNumberAID);
- assert(IN && "Instruction has no numbering annotation!");
- cout << "#" << IN->InstNum << I;
- }
-}
+void Interpreter::visitVAArgInst(VAArgInst &I) {
+ ExecutionContext &SF = ECStack.back();
-void Interpreter::printValue(const Type *Ty, GenericValue V) {
- switch (Ty->getPrimitiveID()) {
- case Type::BoolTyID: cout << (V.BoolVal?"true":"false"); break;
- case Type::SByteTyID:
- cout << (int)V.SByteVal << " '" << V.SByteVal << "'"; break;
- case Type::UByteTyID:
- cout << (unsigned)V.UByteVal << " '" << V.UByteVal << "'"; break;
- case Type::ShortTyID: cout << V.ShortVal; break;
- case Type::UShortTyID: cout << V.UShortVal; break;
- case Type::IntTyID: cout << V.IntVal; break;
- case Type::UIntTyID: cout << V.UIntVal; break;
- case Type::LongTyID: cout << (long)V.LongVal; break;
- case Type::ULongTyID: cout << (unsigned long)V.ULongVal; break;
- case Type::FloatTyID: cout << V.FloatVal; break;
- case Type::DoubleTyID: cout << V.DoubleVal; break;
- case Type::PointerTyID:cout << (void*)V.PointerVal; break;
+ // Get the incoming valist parameter. LLI treats the valist as a
+ // (ec-stack-depth var-arg-index) pair.
+ GenericValue VAList = getOperandValue(I.getOperand(0), SF);
+ GenericValue Dest;
+ GenericValue Src = ECStack[VAList.UIntPairVal.first]
+ .VarArgs[VAList.UIntPairVal.second];
+ const Type *Ty = I.getType();
+ switch (Ty->getTypeID()) {
+ case Type::IntegerTyID: {
+ unsigned BitWidth = cast<IntegerType>(Ty)->getBitWidth();
+ if (BitWidth == 1)
+ Dest.Int1Val = Src.Int1Val;
+ else if (BitWidth <= 8)
+ Dest.Int8Val = Src.Int8Val;
+ else if (BitWidth <= 16)
+ Dest.Int16Val = Src.Int16Val;
+ else if (BitWidth <= 32)
+ Dest.Int32Val = Src.Int32Val;
+ else if (BitWidth <= 64)
+ Dest.Int64Val = Src.Int64Val;
+ else
+ assert("Integer types > 64 bits not supported");
+ maskToBitWidth(Dest, BitWidth);
+ }
+ IMPLEMENT_VAARG(Pointer);
+ IMPLEMENT_VAARG(Float);
+ IMPLEMENT_VAARG(Double);
default:
- cout << "- Don't know how to print value of this type!";
- break;
+ cerr << "Unhandled dest type for vaarg instruction: " << *Ty << "\n";
+ abort();
}
-}
-void Interpreter::print(const Type *Ty, GenericValue V) {
- CW << Ty << " ";
- printValue(Ty, V);
+ // Set the Value of this Instruction.
+ SetValue(&I, Dest, SF);
+
+ // Move the pointer to the next vararg.
+ ++VAList.UIntPairVal.second;
}
-void Interpreter::print(const std::string &Name) {
- Value *PickedVal = ChooseOneOption(Name, LookupMatchingNames(Name));
- if (!PickedVal) return;
+//===----------------------------------------------------------------------===//
+// Dispatch and Execution Code
+//===----------------------------------------------------------------------===//
- if (const Function *F = dyn_cast<const Function>(PickedVal)) {
- CW << F; // Print the function
- } else if (const Type *Ty = dyn_cast<const Type>(PickedVal)) {
- CW << "type %" << Name << " = " << Ty->getDescription() << "\n";
- } else if (const BasicBlock *BB = dyn_cast<const BasicBlock>(PickedVal)) {
- CW << BB; // Print the basic block
- } else { // Otherwise there should be an annotation for the slot#
- print(PickedVal->getType(),
- getOperandValue(PickedVal, ECStack[CurFrame]));
- cout << "\n";
+//===----------------------------------------------------------------------===//
+// callFunction - Execute the specified function...
+//
+void Interpreter::callFunction(Function *F,
+ const std::vector<GenericValue> &ArgVals) {
+ assert((ECStack.empty() || ECStack.back().Caller.getInstruction() == 0 ||
+ ECStack.back().Caller.arg_size() == ArgVals.size()) &&
+ "Incorrect number of arguments passed into function call!");
+ // Make a new stack frame... and fill it in.
+ ECStack.push_back(ExecutionContext());
+ ExecutionContext &StackFrame = ECStack.back();
+ StackFrame.CurFunction = F;
+
+ // Special handling for external functions.
+ if (F->isExternal()) {
+ GenericValue Result = callExternalFunction (F, ArgVals);
+ // Simulate a 'ret' instruction of the appropriate type.
+ popStackAndReturnValueToCaller (F->getReturnType (), Result);
+ return;
}
-}
-
-void Interpreter::infoValue(const std::string &Name) {
- Value *PickedVal = ChooseOneOption(Name, LookupMatchingNames(Name));
- if (!PickedVal) return;
- cout << "Value: ";
- print(PickedVal->getType(),
- getOperandValue(PickedVal, ECStack[CurFrame]));
- cout << "\n";
- printOperandInfo(PickedVal, ECStack[CurFrame]);
-}
+ // Get pointers to first LLVM BB & Instruction in function.
+ StackFrame.CurBB = F->begin();
+ StackFrame.CurInst = StackFrame.CurBB->begin();
-// printStackFrame - Print information about the specified stack frame, or -1
-// for the default one.
-//
-void Interpreter::printStackFrame(int FrameNo) {
- if (FrameNo == -1) FrameNo = CurFrame;
- Function *F = ECStack[FrameNo].CurMethod;
- const Type *RetTy = F->getReturnType();
+ // Run through the function arguments and initialize their values...
+ assert((ArgVals.size() == F->arg_size() ||
+ (ArgVals.size() > F->arg_size() && F->getFunctionType()->isVarArg()))&&
+ "Invalid number of values passed to function invocation!");
- CW << ((FrameNo == CurFrame) ? '>' : '-') << "#" << FrameNo << ". "
- << (Value*)RetTy << " \"" << F->getName() << "\"(";
-
+ // Handle non-varargs arguments...
unsigned i = 0;
- for (Function::aiterator I = F->abegin(), E = F->aend(); I != E; ++I, ++i) {
- if (i != 0) cout << ", ";
- CW << *I << "=";
-
- printValue(I->getType(), getOperandValue(I, ECStack[FrameNo]));
- }
+ for (Function::arg_iterator AI = F->arg_begin(), E = F->arg_end(); AI != E; ++AI, ++i)
+ SetValue(AI, ArgVals[i], StackFrame);
- cout << ")\n";
+ // Handle varargs arguments...
+ StackFrame.VarArgs.assign(ArgVals.begin()+i, ArgVals.end());
+}
- if (FrameNo != int(ECStack.size()-1)) {
- BasicBlock::iterator I = ECStack[FrameNo].CurInst;
- CW << --I;
- } else {
- CW << *ECStack[FrameNo].CurInst;
+void Interpreter::run() {
+ while (!ECStack.empty()) {
+ // Interpret a single instruction & increment the "PC".
+ ExecutionContext &SF = ECStack.back(); // Current stack frame
+ Instruction &I = *SF.CurInst++; // Increment before execute
+
+ // Track the number of dynamic instructions executed.
+ ++NumDynamicInsts;
+
+ DOUT << "About to interpret: " << I;
+ visit(I); // Dispatch to one of the visit* methods...
}
}
-
projects / oota-llvm.git / blobdiff