//===-- 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 "llvm/Function.h"
-#include "llvm/Instructions.h"
-#include "llvm/DerivedTypes.h"
#include "llvm/Constants.h"
-#include "Support/Statistic.h"
-#include <cmath> // For fmod
+#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;
-Interpreter *TheEE = 0;
+STATISTIC(NumDynamicInsts, "Number of dynamic instructions executed");
+static Interpreter *TheEE = 0;
-namespace {
- Statistic<> NumDynamicInsts("lli", "Number of dynamic instructions executed");
-}
//===----------------------------------------------------------------------===//
// Value Manipulation code
//===----------------------------------------------------------------------===//
-// Operations used by constant expr implementations...
-static GenericValue executeCastOperation(Value *Src, const Type *DestTy,
- ExecutionContext &SF);
-static GenericValue executeAddInst(GenericValue Src1, GenericValue Src2,
- const Type *Ty);
+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();
+ }
+}
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 TheEE->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());
- default:
- std::cerr << "Unhandled ConstantExpr: " << CE << "\n";
- abort();
- return GenericValue();
- }
+ return getConstantExprValue(CE, SF);
} else if (Constant *CPV = dyn_cast<Constant>(V)) {
- return TheEE->getConstantValue(CPV);
+ return getConstantValue(CPV);
} else if (GlobalValue *GV = dyn_cast<GlobalValue>(V)) {
- return PTOGV(TheEE->getPointerToGlobal(GV));
+ return PTOGV(getPointerToGlobal(GV));
} else {
return SF.Values[V];
}
SF.Values[V] = Val;
}
-//===----------------------------------------------------------------------===//
-// Annotation Wrangling code
-//===----------------------------------------------------------------------===//
-
void Interpreter::initializeExecutionEngine() {
TheEE = this;
}
#define IMPLEMENT_BINARY_OPERATOR(OP, TY) \
case Type::TY##TyID: Dest.TY##Val = Src1.TY##Val OP Src2.TY##Val; break
-static GenericValue executeAddInst(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);
+#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(); \
+ }
+
+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:
- std::cout << "Unhandled type for Add instruction: " << *Ty << "\n";
+ cerr << "Unhandled type for Add instruction: " << *Ty << "\n";
abort();
}
return Dest;
}
-static GenericValue executeSubInst(GenericValue Src1, GenericValue Src2,
- const Type *Ty) {
+static GenericValue executeSubInst(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);
+ switch (Ty->getTypeID()) {
+ IMPLEMENT_INTEGER_BINOP(-, Ty);
IMPLEMENT_BINARY_OPERATOR(-, Float);
IMPLEMENT_BINARY_OPERATOR(-, Double);
default:
- std::cout << "Unhandled type for Sub instruction: " << *Ty << "\n";
+ cerr << "Unhandled type for Sub instruction: " << *Ty << "\n";
abort();
}
return Dest;
}
-static GenericValue executeMulInst(GenericValue Src1, GenericValue Src2,
- const Type *Ty) {
+static GenericValue executeMulInst(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);
+ switch (Ty->getTypeID()) {
+ IMPLEMENT_INTEGER_BINOP(*, Ty);
IMPLEMENT_BINARY_OPERATOR(*, Float);
IMPLEMENT_BINARY_OPERATOR(*, Double);
default:
- std::cout << "Unhandled type for Mul instruction: " << Ty << "\n";
+ cerr << "Unhandled type for Mul instruction: " << *Ty << "\n";
abort();
}
return Dest;
}
-static GenericValue executeDivInst(GenericValue Src1, GenericValue Src2,
- const Type *Ty) {
+static GenericValue executeUDivInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ IMPLEMENT_UNSIGNED_BINOP(/,Ty)
+ return Dest;
+}
+
+static GenericValue executeSDivInst(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_SIGNED_BINOP(/,Ty)
+ return Dest;
+}
+
+static GenericValue executeFDivInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ switch (Ty->getTypeID()) {
IMPLEMENT_BINARY_OPERATOR(/, Float);
IMPLEMENT_BINARY_OPERATOR(/, Double);
default:
- std::cout << "Unhandled type for Div instruction: " << *Ty << "\n";
+ cerr << "Unhandled type for FDiv instruction: " << *Ty << "\n";
abort();
}
return Dest;
}
-static GenericValue executeRemInst(GenericValue Src1, GenericValue Src2,
- const Type *Ty) {
+static GenericValue executeURemInst(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_UNSIGNED_BINOP(%, Ty)
+ return Dest;
+}
+
+static GenericValue executeSRemInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ IMPLEMENT_SIGNED_BINOP(%, Ty)
+ return Dest;
+}
+
+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;
Dest.DoubleVal = fmod(Src1.DoubleVal, Src2.DoubleVal);
break;
default:
- std::cout << "Unhandled type for Rem instruction: " << *Ty << "\n";
+ cerr << "Unhandled type for Rem instruction: " << *Ty << "\n";
+ abort();
+ }
+ return Dest;
+}
+
+static GenericValue executeAndInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ IMPLEMENT_UNSIGNED_BINOP(&, Ty)
+ return Dest;
+}
+
+static GenericValue executeOrInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ IMPLEMENT_UNSIGNED_BINOP(|, Ty)
+ return Dest;
+}
+
+static GenericValue executeXorInst(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ IMPLEMENT_UNSIGNED_BINOP(^, Ty)
+ return Dest;
+}
+
+#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->getTypeID()) {
+ IMPLEMENT_UNSIGNED_ICMP(==, Ty);
+ IMPLEMENT_POINTER_ICMP(==);
+ default:
+ cerr << "Unhandled type for ICMP_EQ predicate: " << *Ty << "\n";
abort();
}
return Dest;
}
-static GenericValue executeAndInst(GenericValue Src1, GenericValue Src2,
- const Type *Ty) {
+static GenericValue executeICMP_NE(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
GenericValue Dest;
- switch (Ty->getPrimitiveID()) {
- 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);
+ switch (Ty->getTypeID()) {
+ IMPLEMENT_UNSIGNED_ICMP(!=, Ty);
+ IMPLEMENT_POINTER_ICMP(!=);
default:
- std::cout << "Unhandled type for And instruction: " << *Ty << "\n";
+ cerr << "Unhandled type for ICMP_NE predicate: " << *Ty << "\n";
abort();
}
return Dest;
}
-static GenericValue executeOrInst(GenericValue Src1, GenericValue Src2,
- const Type *Ty) {
+static GenericValue executeICMP_ULT(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
GenericValue Dest;
- switch (Ty->getPrimitiveID()) {
- 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);
+ switch (Ty->getTypeID()) {
+ IMPLEMENT_UNSIGNED_ICMP(<, Ty);
+ IMPLEMENT_POINTER_ICMP(<);
default:
- std::cout << "Unhandled type for Or instruction: " << *Ty << "\n";
+ cerr << "Unhandled type for ICMP_ULT predicate: " << *Ty << "\n";
abort();
}
return Dest;
}
-static GenericValue executeXorInst(GenericValue Src1, GenericValue Src2,
- const Type *Ty) {
+static GenericValue executeICMP_SLT(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
GenericValue Dest;
- switch (Ty->getPrimitiveID()) {
- 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);
+ switch (Ty->getTypeID()) {
+ IMPLEMENT_SIGNED_ICMP(<, Ty);
+ IMPLEMENT_POINTER_ICMP(<);
default:
- std::cout << "Unhandled type for Xor instruction: " << *Ty << "\n";
+ cerr << "Unhandled type for ICMP_SLT predicate: " << *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 executeICMP_UGT(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_UGT predicate: " << *Ty << "\n";
+ abort();
+ }
+ return Dest;
+}
-// 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 executeICMP_SGT(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ switch (Ty->getTypeID()) {
+ IMPLEMENT_SIGNED_ICMP(>, Ty);
+ IMPLEMENT_POINTER_ICMP(>);
+ default:
+ 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 executeICMP_SLE(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ switch (Ty->getTypeID()) {
+ IMPLEMENT_SIGNED_ICMP(<=, Ty);
+ IMPLEMENT_POINTER_ICMP(<=);
+ default:
+ 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 executeICMP_SGE(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ switch (Ty->getTypeID()) {
+ IMPLEMENT_SIGNED_ICMP(>=, Ty);
+ IMPLEMENT_POINTER_ICMP(>=);
+ default:
+ cerr << "Unhandled type for ICMP_SGE predicate: " << *Ty << "\n";
+ abort();
+ }
+ return Dest;
+}
-static GenericValue executeSetEQInst(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_POINTERSETCC(==);
+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:
- std::cout << "Unhandled type for SetEQ instruction: " << *Ty << "\n";
+ cerr << "Don't know how to handle this ICmp predicate!\n-->" << I;
+ abort();
+ }
+
+ SetValue(&I, R, SF);
+}
+
+#define IMPLEMENT_FCMP(OP, TY) \
+ case Type::TY##TyID: Dest.Int1Val = Src1.TY##Val OP Src2.TY##Val; break
+
+static GenericValue executeFCMP_OEQ(GenericValue Src1, GenericValue Src2,
+ const Type *Ty) {
+ GenericValue Dest;
+ switch (Ty->getTypeID()) {
+ IMPLEMENT_FCMP(==, Float);
+ IMPLEMENT_FCMP(==, Double);
+ default:
+ cerr << "Unhandled type for FCmp EQ instruction: " << *Ty << "\n";
abort();
}
return Dest;
}
-static GenericValue executeSetNEInst(GenericValue Src1, GenericValue Src2,
- const Type *Ty) {
+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_POINTERSETCC(!=);
+ switch (Ty->getTypeID()) {
+ IMPLEMENT_FCMP(!=, Float);
+ IMPLEMENT_FCMP(!=, Double);
default:
- std::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) {
+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_POINTERSETCC(<=);
+ switch (Ty->getTypeID()) {
+ IMPLEMENT_FCMP(<=, Float);
+ IMPLEMENT_FCMP(<=, Double);
default:
- std::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) {
+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_POINTERSETCC(>=);
+ switch (Ty->getTypeID()) {
+ IMPLEMENT_FCMP(>=, Float);
+ IMPLEMENT_FCMP(>=, Double);
default:
- std::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) {
+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_POINTERSETCC(<);
+ switch (Ty->getTypeID()) {
+ IMPLEMENT_FCMP(<, Float);
+ IMPLEMENT_FCMP(<, Double);
default:
- std::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) {
+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_POINTERSETCC(>);
+ switch (Ty->getTypeID()) {
+ IMPLEMENT_FCMP(>, Float);
+ IMPLEMENT_FCMP(>, Double);
default:
- std::cout << "Unhandled type for SetGT instruction: " << *Ty << "\n";
+ cerr << "Unhandled type for FCmp GT instruction: " << *Ty << "\n";
abort();
}
return Dest;
}
+#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();
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::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;
- 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:
- std::cout << "Don't know how to handle this binary operator!\n-->" << I;
+ 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
//===----------------------------------------------------------------------===//
void Interpreter::exitCalled(GenericValue GV) {
- ExitCode = GV.SByteVal;
- ECStack.clear();
+ // 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);
+}
+
+/// 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 && 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::visitReturnInst(ReturnInst &I) {
ExecutionContext &SF = ECStack.back();
- const Type *RetTy = 0;
+ const Type *RetTy = Type::VoidTy;
GenericValue Result;
// Save away the return value... (if we are not 'ret void')
Result = getOperandValue(I.getReturnValue(), SF);
}
- // Pop the current stack frame... this invalidates SF
- ECStack.pop_back();
+ popStackAndReturnValueToCaller(RetTy, Result);
+}
- if (ECStack.empty()) { // Finished main. Put result into exit code...
- if (RetTy && RetTy->isIntegral()) { // Nonvoid return type?
- ExitCode = Result.IntVal; // Capture the exit code of the program
- } else {
- ExitCode = 0;
- }
- } else {
- // 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...
- }
- }
+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) {
+ cerr << "ERROR: Program executed an 'unreachable' instruction!\n";
+ abort();
}
void Interpreter::visitBranchInst(BranchInst &I) {
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);
+ if (getOperandValue(Cond, SF).Int1Val == 0) // If false cond...
+ Dest = I.getSuccessor(1);
}
SwitchToNewBasicBlock(Dest, SF);
}
// 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) {
+ 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);
}
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; PHINode *PN = dyn_cast<PHINode>(SF.CurInst);
- ++SF.CurInst, ++i)
+ for (unsigned i = 0; isa<PHINode>(SF.CurInst); ++SF.CurInst, ++i) {
+ PHINode *PN = cast<PHINode>(SF.CurInst);
SetValue(PN, ResultValues[i], SF);
+ }
}
//===----------------------------------------------------------------------===//
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 = PTOGV(Memory);
assert(Result.PointerVal != 0 && "Null pointer returned by malloc!");
// getElementOffset - The workhorse for getelementptr.
//
-GenericValue Interpreter::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);
-
- // Indices must be ubyte constants...
- const ConstantUInt *CPU = cast<ConstantUInt>(*I);
- assert(CPU->getType() == Type::UByteTy);
- unsigned Index = CPU->getValue();
-
- Total += SLO->MemberOffsets[Index];
- Ty = STy->getElementTypes()[Index];
- } else if (const SequentialType *ST = cast<SequentialType>(Ty)) {
+
+ 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...
- assert((*I)->getType() == Type::LongTy);
- unsigned Idx = getOperandValue(*I, SF).LongVal;
- Ty = ST->getElementType();
- unsigned Size = TD.getTypeSize(Ty);
- Total += Size*Idx;
+ 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);
}
}
void Interpreter::visitGetElementPtrInst(GetElementPtrInst &I) {
ExecutionContext &SF = ECStack.back();
SetValue(&I, TheEE->executeGEPOperation(I.getPointerOperand(),
- I.idx_begin(), I.idx_end(), SF), SF);
+ gep_type_begin(I), gep_type_end(I), SF), SF);
}
void Interpreter::visitLoadInst(LoadInst &I) {
// Miscellaneous Instruction Implementations
//===----------------------------------------------------------------------===//
-void Interpreter::visitCallInst(CallInst &I) {
+void Interpreter::visitCallSite(CallSite CS) {
ExecutionContext &SF = ECStack.back();
- SF.Caller = &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;
- ArgVals.reserve(I.getNumOperands()-1);
- for (unsigned i = 1; i < I.getNumOperands(); ++i) {
- ArgVals.push_back(getOperandValue(I.getOperand(i), SF));
+ 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.
- if (I.getOperand(i)->getType()->isIntegral() &&
- I.getOperand(i)->getType()->getPrimitiveSize() < 4) {
- const Type *Ty = I.getOperand(i)->getType();
- 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!");
+ 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);
+ 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 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();
+ }
+ return Dest;
+}
+
+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;
+}
+
+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;
+}
void Interpreter::visitShl(ShiftInst &I) {
ExecutionContext &SF = ECStack.back();
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);
+}
- 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);
- default:
- std::cout << "Unhandled type for Shl instruction: " << *Ty << "\n";
- }
+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;
+ Dest = executeLShrInst (Src1, Src2, Ty);
SetValue(&I, Dest, SF);
}
-void Interpreter::visitShr(ShiftInst &I) {
+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_SHIFT(>>, UByte);
- IMPLEMENT_SHIFT(>>, SByte);
- IMPLEMENT_SHIFT(>>, UShort);
- IMPLEMENT_SHIFT(>>, Short);
- IMPLEMENT_SHIFT(>>, UInt);
- IMPLEMENT_SHIFT(>>, Int);
- IMPLEMENT_SHIFT(>>, ULong);
- IMPLEMENT_SHIFT(>>, Long);
- default:
- std::cout << "Unhandled type for Shr instruction: " << *Ty << "\n";
- abort();
+#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); \
}
- SetValue(&I, Dest, SF);
+
+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;
}
-#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: 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_END()
-
-GenericValue Interpreter::executeCastOperation(Value *SrcVal, const Type *Ty,
- ExecutionContext &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;
+}
- 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));
- IMPLEMENT_CAST_CASE(Float , (float));
- IMPLEMENT_CAST_CASE(Double , (double));
- IMPLEMENT_CAST_CASE(Bool , (bool));
- default:
- std::cout << "Unhandled dest type for cast instruction: " << *Ty << "\n";
- abort();
- }
+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;
+}
+
+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;
+}
+
+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;
+}
+
+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;
+}
+
+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;
+}
+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;
}
-void Interpreter::visitCastInst(CastInst &I) {
+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;
+}
+
+GenericValue Interpreter::executeBitCastInst(Value *SrcVal, const Type *DstTy,
+ ExecutionContext &SF) {
+
+ 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 Dest;
+}
+
+void Interpreter::visitTruncInst(TruncInst &I) {
+ ExecutionContext &SF = ECStack.back();
+ SetValue(&I, executeTruncInst(I.getOperand(0), I.getType(), SF), SF);
+}
+
+void Interpreter::visitSExtInst(SExtInst &I) {
+ ExecutionContext &SF = ECStack.back();
+ SetValue(&I, executeSExtInst(I.getOperand(0), I.getType(), SF), SF);
+}
+
+void Interpreter::visitZExtInst(ZExtInst &I) {
+ ExecutionContext &SF = ECStack.back();
+ SetValue(&I, executeZExtInst(I.getOperand(0), I.getType(), SF), SF);
+}
+
+void Interpreter::visitFPTruncInst(FPTruncInst &I) {
+ ExecutionContext &SF = ECStack.back();
+ SetValue(&I, executeFPTruncInst(I.getOperand(0), I.getType(), SF), SF);
+}
+
+void Interpreter::visitFPExtInst(FPExtInst &I) {
+ ExecutionContext &SF = ECStack.back();
+ SetValue(&I, executeFPExtInst(I.getOperand(0), I.getType(), SF), SF);
+}
+
+void Interpreter::visitUIToFPInst(UIToFPInst &I) {
+ ExecutionContext &SF = ECStack.back();
+ SetValue(&I, executeUIToFPInst(I.getOperand(0), I.getType(), SF), SF);
+}
+
+void Interpreter::visitSIToFPInst(SIToFPInst &I) {
+ ExecutionContext &SF = ECStack.back();
+ SetValue(&I, executeSIToFPInst(I.getOperand(0), I.getType(), SF), SF);
+}
+
+void Interpreter::visitFPToUIInst(FPToUIInst &I) {
+ ExecutionContext &SF = ECStack.back();
+ SetValue(&I, executeFPToUIInst(I.getOperand(0), I.getType(), SF), SF);
+}
+
+void Interpreter::visitFPToSIInst(FPToSIInst &I) {
+ ExecutionContext &SF = ECStack.back();
+ SetValue(&I, executeFPToSIInst(I.getOperand(0), I.getType(), SF), SF);
+}
+
+void Interpreter::visitPtrToIntInst(PtrToIntInst &I) {
+ ExecutionContext &SF = ECStack.back();
+ SetValue(&I, executePtrToIntInst(I.getOperand(0), I.getType(), SF), SF);
+}
+
+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, executeCastOperation(I.getOperand(0), I.getType(), SF), SF);
+ SetValue(&I, executeBitCastInst(I.getOperand(0), I.getType(), SF), SF);
}
-void Interpreter::visitVANextInst(VANextInst &I) {
+#define IMPLEMENT_VAARG(TY) \
+ case Type::TY##TyID: Dest.TY##Val = Src.TY##Val; break
+
+void Interpreter::visitVAArgInst(VAArgInst &I) {
ExecutionContext &SF = ECStack.back();
- // Get the incoming valist element. LLI treats the valist as an integer.
+ // 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);
-
- // Move to the next operand.
- unsigned Argument = VAList.IntVal++;
- assert(Argument < SF.VarArgs.size() &&
- "Accessing past the last vararg argument!");
- SetValue(&I, VAList, 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:
+ cerr << "Unhandled dest type for vaarg instruction: " << *Ty << "\n";
+ abort();
+ }
+
+ // Set the Value of this Instruction.
+ SetValue(&I, Dest, SF);
+
+ // Move the pointer to the next vararg.
+ ++VAList.UIntPairVal.second;
}
//===----------------------------------------------------------------------===//
//
void Interpreter::callFunction(Function *F,
const std::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 (F->isExternal()) {
- GenericValue Result = callExternalFunction(F, ArgVals);
- const Type *RetTy = F->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...
- }
- }
-
- return;
- }
-
- // Process the function, assigning instruction numbers to the instructions in
- // the function. Also calculate the number of values for each type slot
- // active.
- //
-
+ 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;
+ }
+
+ // Get pointers to first LLVM BB & Instruction in function.
StackFrame.CurBB = F->begin();
StackFrame.CurInst = StackFrame.CurBB->begin();
// Run through the function arguments and initialize their values...
- assert((ArgVals.size() == F->asize() ||
- (ArgVals.size() > F->asize() && F->getFunctionType()->isVarArg())) &&
+ assert((ArgVals.size() == F->arg_size() ||
+ (ArgVals.size() > F->arg_size() && F->getFunctionType()->isVarArg()))&&
"Invalid number of values passed to function invocation!");
// Handle non-varargs arguments...
unsigned i = 0;
- for (Function::aiterator AI = F->abegin(), E = F->aend(); AI != E; ++AI, ++i)
+ for (Function::arg_iterator AI = F->arg_begin(), E = F->arg_end(); AI != E; ++AI, ++i)
SetValue(AI, ArgVals[i], StackFrame);
// Handle varargs arguments...
// 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...
}
}