//===-- 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/iOther.h"
-#include "llvm/iTerminators.h"
-#include "llvm/iMemory.h"
-#include "llvm/Type.h"
-#include "llvm/ConstPoolVals.h"
-#include "llvm/Assembly/Writer.h"
-#include "llvm/Support/DataTypes.h"
-#include "llvm/Target/TargetData.h"
-#include "llvm/GlobalVariable.h"
-
-// Create a TargetData structure to handle memory addressing and size/alignment
-// computations
-//
-static TargetData TD("lli Interpreter");
+#include "llvm/Constants.h"
+#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 <cmath> // For fmod
+using namespace llvm;
+
+namespace {
+ Statistic<> NumDynamicInsts("lli", "Number of dynamic instructions executed");
+
+ 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;
-}
-
-#define GET_CONST_VAL(TY, CLASS) \
- case Type::TY##TyID: Result.TY##Val = cast<CLASS>(CPV)->getValue(); break
-
-static GenericValue getOperandValue(Value *V, ExecutionContext &SF) {
- if (ConstPoolVal *CPV = dyn_cast<ConstPoolVal>(V)) {
- GenericValue Result;
- switch (CPV->getType()->getPrimitiveID()) {
- GET_CONST_VAL(Bool , ConstPoolBool);
- GET_CONST_VAL(UByte , ConstPoolUInt);
- GET_CONST_VAL(SByte , ConstPoolSInt);
- GET_CONST_VAL(UShort , ConstPoolUInt);
- GET_CONST_VAL(Short , ConstPoolSInt);
- GET_CONST_VAL(UInt , ConstPoolUInt);
- GET_CONST_VAL(Int , ConstPoolSInt);
- GET_CONST_VAL(ULong , ConstPoolUInt);
- GET_CONST_VAL(Long , ConstPoolSInt);
- GET_CONST_VAL(Float , ConstPoolFP);
- GET_CONST_VAL(Double , ConstPoolFP);
- case Type::PointerTyID:
- if (isa<ConstPoolPointerNull>(CPV)) {
- Result.PointerVal = 0;
- } else if (ConstPoolPointerRef *CPR =dyn_cast<ConstPoolPointerRef>(CPV)) {
- assert(0 && "Not implemented!");
- } else {
- assert(0 && "Unknown constant pointer type!");
- }
- break;
- default:
- cout << "ERROR: Constant unimp for type: " << CPV->getType() << endl;
- }
- return Result;
- } else if (GlobalValue *GV = dyn_cast<GlobalValue>(V)) {
- GlobalAddress *Address =
- (GlobalAddress*)GV->getOrCreateAnnotation(GlobalAddressAID);
- GenericValue Result;
- Result.PointerVal = (GenericValue*)Address->Ptr;
- return Result;
- } else {
- unsigned TyP = V->getType()->getUniqueID(); // TypePlane for value
- return SF.Values[TyP][getOperandSlot(V)];
+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 executeRemInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty);
+static GenericValue executeDivInst(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 executeSetEQInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty);
+static GenericValue executeSetNEInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty);
+static GenericValue executeSetLTInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty);
+static GenericValue executeSetGTInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty);
+static GenericValue executeSetLEInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty);
+static GenericValue executeSetGEInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty);
+static GenericValue executeShlInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty);
+static GenericValue executeShrInst(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::Cast:
+ return executeCastOperation(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::Div:
+ return executeDivInst(getOperandValue(CE->getOperand(0), SF),
+ getOperandValue(CE->getOperand(1), SF),
+ CE->getOperand(0)->getType());
+ case Instruction::Rem:
+ return executeRemInst(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::SetEQ:
+ return executeSetEQInst(getOperandValue(CE->getOperand(0), SF),
+ getOperandValue(CE->getOperand(1), SF),
+ CE->getOperand(0)->getType());
+ case Instruction::SetNE:
+ return executeSetNEInst(getOperandValue(CE->getOperand(0), SF),
+ getOperandValue(CE->getOperand(1), SF),
+ CE->getOperand(0)->getType());
+ case Instruction::SetLE:
+ return executeSetLEInst(getOperandValue(CE->getOperand(0), SF),
+ getOperandValue(CE->getOperand(1), SF),
+ CE->getOperand(0)->getType());
+ case Instruction::SetGE:
+ return executeSetGEInst(getOperandValue(CE->getOperand(0), SF),
+ getOperandValue(CE->getOperand(1), SF),
+ CE->getOperand(0)->getType());
+ case Instruction::SetLT:
+ return executeSetLTInst(getOperandValue(CE->getOperand(0), SF),
+ getOperandValue(CE->getOperand(1), SF),
+ CE->getOperand(0)->getType());
+ case Instruction::SetGT:
+ return executeSetGTInst(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::Shr:
+ return executeShrInst(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:
+ std::cerr << "Unhandled ConstantExpr: " << *CE << "\n";
+ abort();
+ return GenericValue();
}
}
-static void printOperandInfo(Value *V, ExecutionContext &SF) {
- if (isa<ConstPoolVal>(V)) {
- cout << "Constant Pool Value\n";
- } else if (isa<GlobalValue>(V)) {
- cout << "Global Value\n";
+GenericValue Interpreter::getOperandValue(Value *V, ExecutionContext &SF) {
+ if (ConstantExpr *CE = dyn_cast<ConstantExpr>(V)) {
+ return getConstantExprValue(CE, SF);
+ } else if (Constant *CPV = dyn_cast<Constant>(V)) {
+ return getConstantValue(CPV);
+ } else if (GlobalValue *GV = dyn_cast<GlobalValue>(V)) {
+ return PTOGV(getPointerToGlobal(GV));
} 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 << endl;
+ 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)] << endl;
- SF.Values[TyP][getOperandSlot(V)] = Val;
+ SF.Values[V] = Val;
}
-
-//===----------------------------------------------------------------------===//
-// Annotation Wrangling code
-//===----------------------------------------------------------------------===//
-
void Interpreter::initializeExecutionEngine() {
- AnnotationManager::registerAnnotationFactory(MethodInfoAID,
- &MethodInfo::Create);
- AnnotationManager::registerAnnotationFactory(GlobalAddressAID,
- &GlobalAddress::Create);
+ TheEE = this;
}
-// InitializeMemory - Recursive function to apply a ConstPool value into the
-// specified memory location...
-//
-static void InitializeMemory(ConstPoolVal *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 , ConstPoolBool, bool);
- INITIALIZE_MEMORY(UByte , ConstPoolUInt, unsigned char);
- INITIALIZE_MEMORY(SByte , ConstPoolSInt, signed char);
- INITIALIZE_MEMORY(UShort , ConstPoolUInt, unsigned short);
- INITIALIZE_MEMORY(Short , ConstPoolSInt, signed short);
- INITIALIZE_MEMORY(UInt , ConstPoolUInt, unsigned int);
- INITIALIZE_MEMORY(Int , ConstPoolSInt, signed int);
- INITIALIZE_MEMORY(ULong , ConstPoolUInt, uint64_t);
- INITIALIZE_MEMORY(Long , ConstPoolSInt, int64_t);
- INITIALIZE_MEMORY(Float , ConstPoolFP , float);
- INITIALIZE_MEMORY(Double , ConstPoolFP , double);
-#undef INITIALIZE_MEMORY
-
- case Type::ArrayTyID: {
- ConstPoolArray *CPA = cast<ConstPoolArray>(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<ConstPoolVal>(Val[i].get()), Addr+i*ElementSize);
- return;
- }
-
- case Type::StructTyID: {
- ConstPoolStruct *CPS = cast<ConstPoolStruct>(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<ConstPoolVal>(Val[i].get()),
- Addr+SL->MemberOffsets[i]);
- return;
- }
-
- case Type::PointerTyID:
- if (isa<ConstPoolPointerNull>(Init)) {
- *(void**)Addr = 0;
- } else if (ConstPoolPointerRef *CPR = dyn_cast<ConstPoolPointerRef>(Init)) {
- GlobalAddress *Address =
- (GlobalAddress*)CPR->getValue()->getOrCreateAnnotation(GlobalAddressAID);
- *(void**)Addr = (GenericValue*)Address->Ptr;
- } else {
- assert(0 && "Unknown Constant pointer type!");
- }
- return;
-
- default:
- cout << "Bad Type: " << Init->getType()->getDescription() << endl;
- assert(0 && "Unknown constant type to initialize memory with!");
- }
-}
-
-Annotation *GlobalAddress::Create(AnnotationID AID, const Annotable *O, void *){
- assert(AID == GlobalAddressAID);
-
- // This annotation will only be created on GlobalValue objects...
- GlobalValue *GVal = cast<GlobalValue>((Value*)O);
-
- if (isa<Method>(GVal)) {
- // The GlobalAddress object for a method is just a pointer to method itself.
- // Don't delete it when the annotation is gone though!
- return new GlobalAddress(GVal, false);
- }
-
- // Handle the case of a global variable...
- assert(isa<GlobalVariable>(GVal) &&
- "Global value found that isn't a method 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()->getValueType(); // Type to be allocated
- unsigned NumElements = 1;
-
- if (isa<ArrayType>(Ty) && cast<ArrayType>(Ty)->isUnsized()) {
- assert(GV->hasInitializer() && "Const val must have an initializer!");
- // Allocating a unsized array type?
- Ty = cast<const ArrayType>(Ty)->getElementType(); // Get the actual type...
-
- // Get the number of elements being allocated by the array...
- NumElements =cast<ConstPoolArray>(GV->getInitializer())->getValues().size();
- }
-
- // Allocate enough memory to hold the type...
- void *Addr = malloc(NumElements * TD.getTypeSize(Ty));
- assert(Addr != 0 && "Null pointer returned by malloc!");
-
- // Initialize the memory if there is an initializer...
- if (GV->hasInitializer())
- InitializeMemory(GV->getInitializer(), (char*)Addr);
-
- return new GlobalAddress(Addr, true); // Simply invoke the ctor
-}
-
-
//===----------------------------------------------------------------------===//
// Binary Instruction Implementations
//===----------------------------------------------------------------------===//
#define IMPLEMENT_BINARY_OPERATOR(OP, TY) \
case Type::TY##TyID: Dest.TY##Val = Src1.TY##Val OP Src2.TY##Val; break
-#define IMPLEMENT_BINARY_PTR_OPERATOR(OP) \
- case Type::PointerTyID: Dest.PointerVal = \
- (GenericValue*)((unsigned long)Src1.PointerVal OP (unsigned long)Src2.PointerVal); break
-static GenericValue executeAddInst(GenericValue Src1, GenericValue Src2,
- const Type *Ty, ExecutionContext &SF) {
+static GenericValue executeAddInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
GenericValue Dest;
- switch (Ty->getPrimitiveID()) {
+ switch (Ty->getTypeID()) {
IMPLEMENT_BINARY_OPERATOR(+, UByte);
IMPLEMENT_BINARY_OPERATOR(+, SByte);
IMPLEMENT_BINARY_OPERATOR(+, UShort);
IMPLEMENT_BINARY_OPERATOR(+, Long);
IMPLEMENT_BINARY_OPERATOR(+, Float);
IMPLEMENT_BINARY_OPERATOR(+, Double);
- IMPLEMENT_BINARY_PTR_OPERATOR(+);
default:
- cout << "Unhandled type for Add instruction: " << Ty << endl;
+ std::cout << "Unhandled type for Add instruction: " << *Ty << "\n";
+ abort();
}
return Dest;
}
-static GenericValue executeSubInst(GenericValue Src1, GenericValue Src2,
- const Type *Ty, ExecutionContext &SF) {
+static GenericValue executeSubInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
GenericValue Dest;
- switch (Ty->getPrimitiveID()) {
+ switch (Ty->getTypeID()) {
IMPLEMENT_BINARY_OPERATOR(-, UByte);
IMPLEMENT_BINARY_OPERATOR(-, SByte);
IMPLEMENT_BINARY_OPERATOR(-, UShort);
IMPLEMENT_BINARY_OPERATOR(-, Long);
IMPLEMENT_BINARY_OPERATOR(-, Float);
IMPLEMENT_BINARY_OPERATOR(-, Double);
- IMPLEMENT_BINARY_PTR_OPERATOR(-);
default:
- cout << "Unhandled type for Sub instruction: " << Ty << endl;
+ std::cout << "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_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);
+ default:
+ std::cout << "Unhandled type for Mul instruction: " << *Ty << "\n";
+ abort();
+ }
+ return Dest;
+}
+
+static GenericValue executeDivInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ switch (Ty->getTypeID()) {
+ 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);
+ default:
+ std::cout << "Unhandled type for Div instruction: " << *Ty << "\n";
+ abort();
+ }
+ return Dest;
+}
+
+static GenericValue executeRemInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ switch (Ty->getTypeID()) {
+ 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);
+ case Type::FloatTyID:
+ Dest.FloatVal = fmod(Src1.FloatVal, Src2.FloatVal);
+ break;
+ case Type::DoubleTyID:
+ Dest.DoubleVal = fmod(Src1.DoubleVal, Src2.DoubleVal);
+ break;
+ default:
+ std::cout << "Unhandled type for Rem instruction: " << *Ty << "\n";
+ abort();
+ }
+ return Dest;
+}
+
+static GenericValue executeAndInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ switch (Ty->getTypeID()) {
+ IMPLEMENT_BINARY_OPERATOR(&, Bool);
+ 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);
+ default:
+ std::cout << "Unhandled type for And instruction: " << *Ty << "\n";
+ abort();
+ }
+ return Dest;
+}
+
+static GenericValue executeOrInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ switch (Ty->getTypeID()) {
+ IMPLEMENT_BINARY_OPERATOR(|, Bool);
+ 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);
+ default:
+ std::cout << "Unhandled type for Or instruction: " << *Ty << "\n";
+ abort();
+ }
+ return Dest;
+}
+
+static GenericValue executeXorInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ switch (Ty->getTypeID()) {
+ IMPLEMENT_BINARY_OPERATOR(^, Bool);
+ 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);
+ default:
+ std::cout << "Unhandled type for Xor instruction: " << *Ty << "\n";
+ abort();
}
return Dest;
}
#define IMPLEMENT_SETCC(OP, TY) \
case Type::TY##TyID: Dest.BoolVal = Src1.TY##Val OP Src2.TY##Val; break
-static GenericValue executeSetEQInst(GenericValue Src1, GenericValue Src2,
- const Type *Ty, ExecutionContext &SF) {
+// 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_POINTERSETCC(OP) \
+ case Type::PointerTyID: \
+ Dest.BoolVal = (void*)(intptr_t)Src1.PointerVal OP \
+ (void*)(intptr_t)Src2.PointerVal; break
+
+static GenericValue executeSetEQInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
GenericValue Dest;
- switch (Ty->getPrimitiveID()) {
+ switch (Ty->getTypeID()) {
IMPLEMENT_SETCC(==, UByte);
IMPLEMENT_SETCC(==, SByte);
IMPLEMENT_SETCC(==, UShort);
IMPLEMENT_SETCC(==, Long);
IMPLEMENT_SETCC(==, Float);
IMPLEMENT_SETCC(==, Double);
- IMPLEMENT_SETCC(==, Pointer);
+ IMPLEMENT_POINTERSETCC(==);
default:
- cout << "Unhandled type for SetEQ instruction: " << Ty << endl;
+ std::cout << "Unhandled type for SetEQ instruction: " << *Ty << "\n";
+ abort();
}
return Dest;
}
-static GenericValue executeSetNEInst(GenericValue Src1, GenericValue Src2,
- const Type *Ty, ExecutionContext &SF) {
+static GenericValue executeSetNEInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
GenericValue Dest;
- switch (Ty->getPrimitiveID()) {
+ switch (Ty->getTypeID()) {
IMPLEMENT_SETCC(!=, UByte);
IMPLEMENT_SETCC(!=, SByte);
IMPLEMENT_SETCC(!=, UShort);
IMPLEMENT_SETCC(!=, Long);
IMPLEMENT_SETCC(!=, Float);
IMPLEMENT_SETCC(!=, Double);
- IMPLEMENT_SETCC(!=, Pointer);
+ IMPLEMENT_POINTERSETCC(!=);
+
default:
- cout << "Unhandled type for SetNE instruction: " << Ty << endl;
+ std::cout << "Unhandled type for SetNE instruction: " << *Ty << "\n";
+ abort();
}
return Dest;
}
-static GenericValue executeSetLEInst(GenericValue Src1, GenericValue Src2,
- const Type *Ty, ExecutionContext &SF) {
+static GenericValue executeSetLEInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
GenericValue Dest;
- switch (Ty->getPrimitiveID()) {
+ switch (Ty->getTypeID()) {
IMPLEMENT_SETCC(<=, UByte);
IMPLEMENT_SETCC(<=, SByte);
IMPLEMENT_SETCC(<=, UShort);
IMPLEMENT_SETCC(<=, Long);
IMPLEMENT_SETCC(<=, Float);
IMPLEMENT_SETCC(<=, Double);
- IMPLEMENT_SETCC(<=, Pointer);
+ IMPLEMENT_POINTERSETCC(<=);
default:
- cout << "Unhandled type for SetLE instruction: " << Ty << endl;
+ std::cout << "Unhandled type for SetLE instruction: " << *Ty << "\n";
+ abort();
}
return Dest;
}
-static GenericValue executeSetGEInst(GenericValue Src1, GenericValue Src2,
- const Type *Ty, ExecutionContext &SF) {
+static GenericValue executeSetGEInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
GenericValue Dest;
- switch (Ty->getPrimitiveID()) {
+ switch (Ty->getTypeID()) {
IMPLEMENT_SETCC(>=, UByte);
IMPLEMENT_SETCC(>=, SByte);
IMPLEMENT_SETCC(>=, UShort);
IMPLEMENT_SETCC(>=, Long);
IMPLEMENT_SETCC(>=, Float);
IMPLEMENT_SETCC(>=, Double);
- IMPLEMENT_SETCC(>=, Pointer);
+ IMPLEMENT_POINTERSETCC(>=);
default:
- cout << "Unhandled type for SetGE instruction: " << Ty << endl;
+ std::cout << "Unhandled type for SetGE instruction: " << *Ty << "\n";
+ abort();
}
return Dest;
}
-static GenericValue executeSetLTInst(GenericValue Src1, GenericValue Src2,
- const Type *Ty, ExecutionContext &SF) {
+static GenericValue executeSetLTInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
GenericValue Dest;
- switch (Ty->getPrimitiveID()) {
+ switch (Ty->getTypeID()) {
IMPLEMENT_SETCC(<, UByte);
IMPLEMENT_SETCC(<, SByte);
IMPLEMENT_SETCC(<, UShort);
IMPLEMENT_SETCC(<, Long);
IMPLEMENT_SETCC(<, Float);
IMPLEMENT_SETCC(<, Double);
- IMPLEMENT_SETCC(<, Pointer);
+ IMPLEMENT_POINTERSETCC(<);
default:
- cout << "Unhandled type for SetLT instruction: " << Ty << endl;
+ std::cout << "Unhandled type for SetLT instruction: " << *Ty << "\n";
+ abort();
}
return Dest;
}
-static GenericValue executeSetGTInst(GenericValue Src1, GenericValue Src2,
- const Type *Ty, ExecutionContext &SF) {
+static GenericValue executeSetGTInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
GenericValue Dest;
- switch (Ty->getPrimitiveID()) {
+ switch (Ty->getTypeID()) {
IMPLEMENT_SETCC(>, UByte);
IMPLEMENT_SETCC(>, SByte);
IMPLEMENT_SETCC(>, UShort);
IMPLEMENT_SETCC(>, Long);
IMPLEMENT_SETCC(>, Float);
IMPLEMENT_SETCC(>, Double);
- IMPLEMENT_SETCC(>, Pointer);
+ IMPLEMENT_POINTERSETCC(>);
default:
- cout << "Unhandled type for SetGT instruction: " << Ty << endl;
+ std::cout << "Unhandled type for SetGT instruction: " << *Ty << "\n";
+ abort();
}
return Dest;
}
-static void executeBinaryInst(BinaryOperator *I, ExecutionContext &SF) {
- const Type *Ty = I->getOperand(0)->getType();
- GenericValue Src1 = getOperandValue(I->getOperand(0), SF);
- GenericValue Src2 = getOperandValue(I->getOperand(1), SF);
+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::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;
+ switch (I.getOpcode()) {
+ 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::Div: R = executeDivInst (Src1, Src2, Ty); break;
+ case Instruction::Rem: R = executeRemInst (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;
+ case Instruction::SetEQ: R = executeSetEQInst(Src1, Src2, Ty); break;
+ case Instruction::SetNE: R = executeSetNEInst(Src1, Src2, Ty); break;
+ case Instruction::SetLE: R = executeSetLEInst(Src1, Src2, Ty); break;
+ case Instruction::SetGE: R = executeSetGEInst(Src1, Src2, Ty); break;
+ case Instruction::SetLT: R = executeSetLTInst(Src1, Src2, Ty); break;
+ case Instruction::SetGT: R = executeSetGTInst(Src1, Src2, Ty); break;
default:
- cout << "Don't know how to handle this binary operator!\n-->" << I;
+ std::cout << "Don't know how to handle this binary operator!\n-->" << I;
+ abort();
}
- SetValue(I, R, SF);
+ SetValue(&I, R, SF);
+}
+
+static GenericValue executeSelectInst(GenericValue Src1, GenericValue Src2,
+ GenericValue Src3) {
+ return Src1.BoolVal ? 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
//===----------------------------------------------------------------------===//
-void Interpreter::executeRetInst(ReturnInst *I, ExecutionContext &SF) {
- const Type *RetTy = 0;
- GenericValue Result;
-
- // Save away the return value... (if we are not 'ret void')
- if (I->getNumOperands()) {
- RetTy = I->getReturnValue()->getType();
- Result = getOperandValue(I->getReturnValue(), SF);
- }
-
- // Save previously executing meth
- const Method *M = ECStack.back().CurMethod;
+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.IntVal);
+}
- // Pop the current stack frame... this invalidates SF
+/// 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();
if (ECStack.empty()) { // Finished main. Put result into exit code...
- if (RetTy) { // Nonvoid return type?
- cout << "Method " << M->getType() << " \"" << M->getName()
- << "\" returned ";
- print(RetTy, Result);
- cout << endl;
-
- if (RetTy->isIntegral())
- ExitCode = Result.SByteVal; // Capture the exit code of the program
+ if (RetTy && RetTy->isIntegral()) { // Nonvoid return type?
+ ExitValue = Result; // Capture the exit value of the program
} else {
- ExitCode = 0;
+ 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...
}
- return;
}
+}
- // 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);
+void Interpreter::visitReturnInst(ReturnInst &I) {
+ ExecutionContext &SF = ECStack.back();
+ const Type *RetTy = Type::VoidTy;
+ GenericValue Result;
- NewSF.Caller = 0; // We returned from the call...
- } else {
- // This must be a function that is executing because of a user 'call'
- // instruction.
- cout << "Method " << M->getType() << " \"" << M->getName()
- << "\" returned ";
- print(RetTy, Result);
- cout << endl;
+ // Save away the return value... (if we are not 'ret void')
+ if (I.getNumOperands()) {
+ RetTy = I.getReturnValue()->getType();
+ Result = getOperandValue(I.getReturnValue(), SF);
}
+
+ popStackAndReturnValueToCaller(RetTy, Result);
}
-void Interpreter::executeBrInst(BranchInst *I, ExecutionContext &SF) {
- SF.PrevBB = SF.CurBB; // Update PrevBB so that PHI nodes work...
+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);
+}
+
+void Interpreter::visitUnreachableInst(UnreachableInst &I) {
+ std::cerr << "ERROR: Program executed an 'unreachable' instruction!\n";
+ abort();
+}
+
+void Interpreter::visitBranchInst(BranchInst &I) {
+ ExecutionContext &SF = ECStack.back();
BasicBlock *Dest;
- Dest = I->getSuccessor(0); // Uncond branches have a fixed dest...
- if (!I->isUnconditional()) {
- if (getOperandValue(I->getCondition(), SF).BoolVal == 0) // If false cond...
- Dest = I->getSuccessor(1);
+ Dest = I.getSuccessor(0); // Uncond branches have a fixed dest...
+ if (!I.isUnconditional()) {
+ Value *Cond = I.getCondition();
+ if (getOperandValue(Cond, SF).BoolVal == 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 (executeSetEQInst(CondVal,
+ getOperandValue(I.getOperand(i), SF), ElTy).BoolVal) {
+ 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) {
- const Type *Ty = I->getType()->getValueType(); // Type to be allocated
- unsigned NumElements = 1;
+void Interpreter::visitAllocationInst(AllocationInst &I) {
+ ExecutionContext &SF = ECStack.back();
- if (I->getNumOperands()) { // Allocating a unsized array type?
- assert(isa<ArrayType>(Ty) && cast<const ArrayType>(Ty)->isUnsized() &&
- "Allocation inst with size operand for !unsized array type???");
- Ty = cast<const ArrayType>(Ty)->getElementType(); // Get the actual type...
+ const Type *Ty = I.getType()->getElementType(); // Type to be allocated
- // Get the number of elements being allocated by the array...
- GenericValue NumEl = getOperandValue(I->getOperand(0), SF);
- NumElements = NumEl.UIntVal;
- }
+ // Get the number of elements being allocated by the array...
+ unsigned NumElements = getOperandValue(I.getOperand(0), SF).UIntVal;
// Allocate enough memory to hold the type...
- GenericValue Result;
- Result.PointerVal = (GenericValue*)malloc(NumElements * TD.getTypeSize(Ty));
+ void *Memory = malloc(NumElements * (size_t)TD.getTypeSize(Ty));
+
+ GenericValue Result = PTOGV(Memory);
assert(Result.PointerVal != 0 && "Null pointer returned by malloc!");
- SetValue(I, Result, SF);
+ SetValue(&I, Result, SF);
- if (I->getOpcode() == Instruction::Alloca) {
- // TODO: FIXME: alloca should keep track of memory to free it later...
- }
+ if (I.getOpcode() == Instruction::Alloca)
+ ECStack.back().Allocas.add(Memory);
}
-static void executeFreeInst(FreeInst *I, ExecutionContext &SF) {
- assert(I->getOperand(0)->getType()->isPointerType() && "Freeing nonptr?");
- GenericValue Value = getOperandValue(I->getOperand(0), 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(Value.PointerVal); // Free memory
+ free(GVTOP(Value)); // Free memory
}
-static void executeLoadInst(LoadInst *I, ExecutionContext &SF) {
- assert(I->getNumOperands() == 1 && "NI!");
- GenericValue *Ptr = getOperandValue(I->getPtrOperand(), SF).PointerVal;
- GenericValue Result;
+// getElementOffset - The workhorse for getelementptr.
+//
+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!");
- 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.LongVal = Ptr->LongVal; break;
- case Type::FloatTyID: Result.FloatVal = Ptr->FloatVal; break;
- case Type::DoubleTyID: Result.DoubleVal = Ptr->DoubleVal; break;
- case Type::PointerTyID: Result.PointerVal = Ptr->PointerVal; break;
- default:
- cout << "Cannot load value of type " << I->getType() << "!\n";
- }
+ PointerTy Total = 0;
- SetValue(I, Result, SF);
-}
-
-static void executeStoreInst(StoreInst *I, ExecutionContext &SF) {
- GenericValue *Ptr = getOperandValue(I->getPtrOperand(), SF).PointerVal;
- GenericValue Val = getOperandValue(I->getOperand(0), SF);
- assert(I->getNumOperands() == 2 && "NI!");
-
- 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::FloatTyID: Ptr->FloatVal = Val.FloatVal; break;
- case Type::DoubleTyID: Ptr->DoubleVal = Val.DoubleVal; break;
- case Type::PointerTyID: Ptr->PointerVal = Val.PointerVal; break;
- default:
- cout << "Cannot store value of type " << I->getType() << "!\n";
+ for (; I != E; ++I) {
+ if (const StructType *STy = dyn_cast<StructType>(*I)) {
+ const StructLayout *SLO = TD.getStructLayout(STy);
+
+ 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);
+
+ uint64_t Idx;
+ switch (I.getOperand()->getType()->getTypeID()) {
+ default: assert(0 && "Illegal getelementptr index for sequential type!");
+ case Type::SByteTyID: Idx = IdxGV.SByteVal; break;
+ case Type::ShortTyID: Idx = IdxGV.ShortVal; break;
+ case Type::IntTyID: Idx = IdxGV.IntVal; break;
+ case Type::LongTyID: Idx = IdxGV.LongVal; break;
+ case Type::UByteTyID: Idx = IdxGV.UByteVal; break;
+ case Type::UShortTyID: Idx = IdxGV.UShortVal; break;
+ case Type::UIntTyID: Idx = IdxGV.UIntVal; break;
+ case Type::ULongTyID: Idx = IdxGV.ULongVal; break;
+ }
+ Total += PointerTy(TD.getTypeSize(ST->getElementType())*Idx);
+ }
}
+
+ GenericValue Result;
+ Result.PointerVal = getOperandValue(Ptr, SF).PointerVal + Total;
+ return Result;
+}
+
+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);
+}
+
+void Interpreter::visitLoadInst(LoadInst &I) {
+ ExecutionContext &SF = ECStack.back();
+ GenericValue SRC = getOperandValue(I.getPointerOperand(), SF);
+ GenericValue *Ptr = (GenericValue*)GVTOP(SRC);
+ GenericValue Result = LoadValueFromMemory(Ptr, I.getType());
+ SetValue(&I, Result, SF);
}
+void Interpreter::visitStoreInst(StoreInst &I) {
+ ExecutionContext &SF = ECStack.back();
+ GenericValue Val = getOperandValue(I.getOperand(0), SF);
+ 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();
- callMethod(I->getCalledMethod(), 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);
+ // 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->isIntegral() && Ty->getPrimitiveSize() < 4) {
+ if (Ty == Type::ShortTy)
+ ArgVals.back().IntVal = ArgVals.back().ShortVal;
+ else if (Ty == Type::UShortTy)
+ ArgVals.back().UIntVal = ArgVals.back().UShortVal;
+ else if (Ty == Type::SByteTy)
+ ArgVals.back().IntVal = ArgVals.back().SByteVal;
+ else if (Ty == Type::UByteTy)
+ ArgVals.back().UIntVal = ArgVals.back().UByteVal;
+ else if (Ty == Type::BoolTy)
+ ArgVals.back().UIntVal = ArgVals.back().BoolVal;
+ else
+ assert(0 && "Unknown type!");
}
}
- assert(IncomingValue && "No PHI node predecessor for current PrevBB!");
- // Found the value, set as the result...
- SetValue(I, getOperandValue(IncomingValue, SF), SF);
+ // To handle indirect calls, we must get the pointer value from the argument
+ // and treat it as a function pointer.
+ GenericValue SRC = getOperandValue(SF.Caller.getCalledValue(), SF);
+ callFunction((Function*)GVTOP(SRC), ArgVals);
}
#define IMPLEMENT_SHIFT(OP, TY) \
case Type::TY##TyID: Dest.TY##Val = Src1.TY##Val OP Src2.UByteVal; break
-static void executeShlInst(ShiftInst *I, ExecutionContext &SF) {
- const Type *Ty = I->getOperand(0)->getType();
- GenericValue Src1 = getOperandValue(I->getOperand(0), SF);
- GenericValue Src2 = getOperandValue(I->getOperand(1), SF);
+static GenericValue executeShlInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
GenericValue Dest;
-
- switch (Ty->getPrimitiveID()) {
+ switch (Ty->getTypeID()) {
IMPLEMENT_SHIFT(<<, UByte);
IMPLEMENT_SHIFT(<<, SByte);
IMPLEMENT_SHIFT(<<, UShort);
IMPLEMENT_SHIFT(<<, ULong);
IMPLEMENT_SHIFT(<<, Long);
default:
- cout << "Unhandled type for Shl instruction: " << Ty << endl;
+ std::cout << "Unhandled type for Shl instruction: " << *Ty << "\n";
}
- SetValue(I, Dest, SF);
+ return Dest;
}
-static void executeShrInst(ShiftInst *I, ExecutionContext &SF) {
- const Type *Ty = I->getOperand(0)->getType();
- GenericValue Src1 = getOperandValue(I->getOperand(0), SF);
- GenericValue Src2 = getOperandValue(I->getOperand(1), SF);
+static GenericValue executeShrInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
GenericValue Dest;
-
- switch (Ty->getPrimitiveID()) {
+ switch (Ty->getTypeID()) {
IMPLEMENT_SHIFT(>>, UByte);
IMPLEMENT_SHIFT(>>, SByte);
IMPLEMENT_SHIFT(>>, UShort);
IMPLEMENT_SHIFT(>>, ULong);
IMPLEMENT_SHIFT(>>, Long);
default:
- cout << "Unhandled type for Shr instruction: " << Ty << endl;
+ std::cout << "Unhandled type for Shr instruction: " << *Ty << "\n";
+ abort();
}
- SetValue(I, Dest, SF);
+ return Dest;
+}
+
+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;
+ Dest = executeShlInst (Src1, Src2, Ty);
+ SetValue(&I, Dest, SF);
+}
+
+void Interpreter::visitShr(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 = executeShrInst (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;
+ 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()) { \
+ switch (SrcTy->getTypeID()) { \
+ IMPLEMENT_CAST(DESTTY, DESTCTY, Bool); \
IMPLEMENT_CAST(DESTTY, DESTCTY, UByte); \
IMPLEMENT_CAST(DESTTY, DESTCTY, SByte); \
IMPLEMENT_CAST(DESTTY, DESTCTY, UShort); \
IMPLEMENT_CAST(DESTTY, DESTCTY, UInt); \
IMPLEMENT_CAST(DESTTY, DESTCTY, Int); \
IMPLEMENT_CAST(DESTTY, DESTCTY, ULong); \
- IMPLEMENT_CAST(DESTTY, DESTCTY, Long);
-
-#define IMPLEMENT_CAST_CASE_PTR_IMP(DESTTY, DESTCTY) \
- IMPLEMENT_CAST(DESTTY, DESTCTY, Pointer)
+ 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 << endl; \
- break; \
+ default: std::cout << "Unhandled cast: " << *SrcTy << " to " << *Ty << "\n"; \
+ abort(); \
} \
break
#define IMPLEMENT_CAST_CASE(DESTTY, DESTCTY) \
IMPLEMENT_CAST_CASE_START(DESTTY, DESTCTY); \
IMPLEMENT_CAST_CASE_FP_IMP(DESTTY, DESTCTY); \
- IMPLEMENT_CAST_CASE_PTR_IMP(DESTTY, DESTCTY); \
IMPLEMENT_CAST_CASE_END()
-#define IMPLEMENT_CAST_CASE_FP(DESTTY, DESTCTY) \
- IMPLEMENT_CAST_CASE_START(DESTTY, DESTCTY); \
- IMPLEMENT_CAST_CASE_FP_IMP(DESTTY, DESTCTY); \
- IMPLEMENT_CAST_CASE_END()
-
-#define IMPLEMENT_CAST_CASE_PTR(DESTTY, DESTCTY) \
- IMPLEMENT_CAST_CASE_START(DESTTY, DESTCTY); \
- IMPLEMENT_CAST_CASE_PTR_IMP(DESTTY, DESTCTY); \
- IMPLEMENT_CAST_CASE_END()
-
-static void executeCastInst(CastInst *I, ExecutionContext &SF) {
- const Type *Ty = I->getType();
- const Type *SrcTy = I->getOperand(0)->getType();
- GenericValue Src = getOperandValue(I->getOperand(0), SF);
- GenericValue Dest;
-
- 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 char);
- 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_FP(Float , float);
- IMPLEMENT_CAST_CASE_FP(Double, double);
- IMPLEMENT_CAST_CASE_PTR(Pointer, GenericValue *);
+GenericValue Interpreter::executeCastOperation(Value *SrcVal, const Type *Ty,
+ ExecutionContext &SF) {
+ const Type *SrcTy = SrcVal->getType();
+ GenericValue Dest, Src = getOperandValue(SrcVal, SF);
+
+ switch (Ty->getTypeID()) {
+ 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));
+ IMPLEMENT_CAST_CASE(Float , (float));
+ IMPLEMENT_CAST_CASE(Double , (double));
+ IMPLEMENT_CAST_CASE(Bool , (bool));
default:
- cout << "Unhandled dest type for cast instruction: " << Ty << endl;
+ std::cout << "Unhandled dest type for cast instruction: " << *Ty << "\n";
+ abort();
}
- SetValue(I, Dest, SF);
-}
+ return Dest;
+}
+void Interpreter::visitCastInst(CastInst &I) {
+ ExecutionContext &SF = ECStack.back();
+ SetValue(&I, executeCastOperation(I.getOperand(0), I.getType(), SF), SF);
+}
+#define IMPLEMENT_VAARG(TY) \
+ case Type::TY##TyID: Dest.TY##Val = Src.TY##Val; break
-//===----------------------------------------------------------------------===//
-// Dispatch and Execution Code
-//===----------------------------------------------------------------------===//
+void Interpreter::visitVAArgInst(VAArgInst &I) {
+ ExecutionContext &SF = ECStack.back();
-MethodInfo::MethodInfo(Method *M) : Annotation(MethodInfoAID) {
- // Assign slot numbers to the method arguments...
- const Method::ArgumentListType &ArgList = M->getArgumentList();
- for (Method::ArgumentListType::const_iterator AI = ArgList.begin(),
- AE = ArgList.end(); AI != AE; ++AI) {
- MethodArgument *MA = *AI;
- MA->addAnnotation(new SlotNumber(getValueSlot(MA)));
+ // 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()) {
+ IMPLEMENT_VAARG(UByte);
+ IMPLEMENT_VAARG(SByte);
+ IMPLEMENT_VAARG(UShort);
+ IMPLEMENT_VAARG(Short);
+ IMPLEMENT_VAARG(UInt);
+ IMPLEMENT_VAARG(Int);
+ IMPLEMENT_VAARG(ULong);
+ IMPLEMENT_VAARG(Long);
+ IMPLEMENT_VAARG(Pointer);
+ IMPLEMENT_VAARG(Float);
+ IMPLEMENT_VAARG(Double);
+ IMPLEMENT_VAARG(Bool);
+ default:
+ std::cout << "Unhandled dest type for vaarg instruction: " << *Ty << "\n";
+ abort();
}
- // Iterate over all of the instructions...
- unsigned InstNum = 0;
- for (Method::inst_iterator MI = M->inst_begin(), ME = M->inst_end();
- MI != ME; ++MI) {
- Instruction *I = *MI; // For each instruction...
- I->addAnnotation(new InstNumber(++InstNum, getValueSlot(I))); // Add Annote
- }
-}
+ // Set the Value of this Instruction.
+ SetValue(&I, Dest, SF);
-unsigned MethodInfo::getValueSlot(const Value *V) {
- unsigned Plane = V->getType()->getUniqueID();
- if (Plane >= NumPlaneElements.size())
- NumPlaneElements.resize(Plane+1, 0);
- return NumPlaneElements[Plane]++;
+ // Move the pointer to the next vararg.
+ ++VAList.UIntPairVal.second;
}
+//===----------------------------------------------------------------------===//
+// Dispatch and Execution Code
+//===----------------------------------------------------------------------===//
//===----------------------------------------------------------------------===//
-// callMethod - Execute the specified method...
+// callFunction - Execute the specified function...
//
-void Interpreter::callMethod(Method *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()) {
- callExternalMethod(M, ArgVals);
+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;
}
- // Process the method, assigning instruction numbers to the instructions in
- // the method. 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->front();
+ // Get pointers to first LLVM BB & Instruction in function.
+ StackFrame.CurBB = F->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]);
- StackFrame.PrevBB = 0; // No previous BB for PHI nodes...
+ // 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!");
-
- // Run through the method arguments and initialize their values...
- assert(ArgVals.size() == M->getArgumentList().size() &&
- "Invalid number of values passed to method invocation!");
+ // Handle non-varargs arguments...
unsigned i = 0;
- for (Method::ArgumentListType::iterator MI = M->getArgumentList().begin(),
- ME = M->getArgumentList().end(); MI != ME; ++MI, ++i) {
- SetValue(*MI, ArgVals[i], StackFrame);
- }
-}
-
-// 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!");
+ for (Function::arg_iterator AI = F->arg_begin(), E = F->arg_end(); AI != E; ++AI, ++i)
+ SetValue(AI, ArgVals[i], StackFrame);
- ExecutionContext &SF = ECStack.back(); // Current stack frame
- Instruction *I = *SF.CurInst++; // Increment before execute
-
- if (I->isBinaryOp()) {
- executeBinaryInst((BinaryOperator*)I, SF);
- } else {
- switch (I->getOpcode()) {
- // Terminators
- case Instruction::Ret: executeRetInst ((ReturnInst*)I, SF); break;
- case Instruction::Br: executeBrInst ((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;
-
- // 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;
- }
- }
-
- // Reset the current frame location to the top of stack
- CurFrame = ECStack.size()-1;
-
- if (CurFrame == -1) return false; // No breakpoint if no code
-
- // Return true if there is a breakpoint annotation on the instruction...
- return (*ECStack[CurFrame].CurInst)->getAnnotation(BreakpointAID) != 0;
-}
-
-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();
-}
-
-// --- 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) {
- // Step into the function...
- if (executeInstruction()) {
- // Hit a breakpoint, print current instruction, then return to user...
- cout << "Breakpoint hit!\n";
- printCurrentInstruction();
- return;
- }
-
- // Finish executing the function...
- finish();
- } else {
- // Normal instruction, just step...
- stepInstruction();
- }
+ // Handle varargs arguments...
+ StackFrame.VarArgs.assign(ArgVals.begin()+i, ArgVals.end());
}
void Interpreter::run() {
- if (ECStack.empty()) {
- cout << "Error: no program running, cannot run!\n";
- return;
- }
-
- bool HitBreakpoint = false;
- while (!ECStack.empty() && !HitBreakpoint) {
- // Run an instruction...
- HitBreakpoint = executeInstruction();
- }
-
- if (HitBreakpoint) {
- cout << "Breakpoint hit!\n";
- }
- // Print the next instruction to execute...
- printCurrentInstruction();
-}
-
-void Interpreter::finish() {
- if (ECStack.empty()) {
- cout << "Error: no program running, cannot run!\n";
- return;
- }
-
- unsigned StackSize = ECStack.size();
- bool HitBreakpoint = false;
- while (ECStack.size() >= StackSize && !HitBreakpoint) {
- // Run an instruction...
- HitBreakpoint = executeInstruction();
- }
-
- if (HitBreakpoint) {
- cout << "Breakpoint hit!\n";
- }
-
- // Print the next instruction to execute...
- printCurrentInstruction();
-}
-
-
-
-// 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()) {
- Instruction *I = *ECStack.back().CurInst;
- InstNumber *IN = (InstNumber*)I->getAnnotation(SlotNumberAID);
- assert(IN && "Instruction has no numbering annotation!");
- cout << "#" << IN->InstNum << I;
- }
-}
-
-void Interpreter::printValue(const Type *Ty, GenericValue V) {
- switch (Ty->getPrimitiveID()) {
- case Type::BoolTyID: cout << (V.BoolVal?"true":"false"); break;
- case Type::SByteTyID: cout << V.SByteVal; break;
- case Type::UByteTyID: cout << 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 << V.LongVal; break;
- case Type::ULongTyID: cout << V.ULongVal; break;
- case Type::FloatTyID: cout << V.FloatVal; break;
- case Type::DoubleTyID: cout << V.DoubleVal; break;
- case Type::PointerTyID:cout << V.PointerVal; break;
- default:
- cout << "- Don't know how to print value of this type!";
- break;
- }
-}
-
-void Interpreter::print(const Type *Ty, GenericValue V) {
- cout << Ty << " ";
- printValue(Ty, V);
-}
-
-void Interpreter::print(const string &Name) {
- Value *PickedVal = ChooseOneOption(Name, LookupMatchingNames(Name));
- if (!PickedVal) return;
-
- if (const Method *M = dyn_cast<const Method>(PickedVal)) {
- cout << M; // Print the method
- } else { // Otherwise there should be an annotation for the slot#
- print(PickedVal->getType(),
- getOperandValue(PickedVal, ECStack[CurFrame]));
- cout << endl;
- }
-
-}
-
-void Interpreter::infoValue(const string &Name) {
- Value *PickedVal = ChooseOneOption(Name, LookupMatchingNames(Name));
- if (!PickedVal) return;
-
- cout << "Value: ";
- print(PickedVal->getType(),
- getOperandValue(PickedVal, ECStack[CurFrame]));
- cout << endl;
- printOperandInfo(PickedVal, ECStack[CurFrame]);
-}
-
-void Interpreter::list() {
- if (ECStack.empty())
- cout << "Error: No program executing!\n";
- else
- cout << ECStack[CurFrame].CurMethod; // Just print the method out...
-}
+ while (!ECStack.empty()) {
+ // Interpret a single instruction & increment the "PC".
+ ExecutionContext &SF = ECStack.back(); // Current stack frame
+ Instruction &I = *SF.CurInst++; // Increment before execute
-void Interpreter::printStackTrace() {
- if (ECStack.empty()) cout << "No program executing!\n";
+ // Track the number of dynamic instructions executed.
+ ++NumDynamicInsts;
- for (unsigned i = 0; i < ECStack.size(); ++i) {
- cout << (((int)i == CurFrame) ? '>' : '-');
- cout << "#" << i << ". " << ECStack[i].CurMethod->getType() << " \""
- << ECStack[i].CurMethod->getName() << "\"(";
- // TODO: Print Args
- cout << ")" << endl;
- cout << *ECStack[i].CurInst;
+ DEBUG(std::cerr << "About to interpret: " << I);
+ visit(I); // Dispatch to one of the visit* methods...
}
}
projects / oota-llvm.git / blobdiff