-//===-- Instruction.cpp - Implement the Instruction class --------*- C++ -*--=//
+//===-- Instruction.cpp - Implement the Instruction class -----------------===//
+//
+// 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 implements the Instruction class for the VMCore library.
//
//===----------------------------------------------------------------------===//
-#include "llvm/Instruction.h"
-#include "llvm/BasicBlock.h"
-#include "llvm/Method.h"
-#include "llvm/SymbolTable.h"
+#include "llvm/Type.h"
+#include "llvm/Instructions.h"
+#include "llvm/Function.h"
+#include "llvm/Support/CallSite.h"
+#include "llvm/Support/LeakDetector.h"
+using namespace llvm;
+
+Instruction::Instruction(const Type *ty, unsigned it, Use *Ops, unsigned NumOps,
+ Instruction *InsertBefore)
+ : User(ty, Value::InstructionVal + it, Ops, NumOps), Parent(0) {
+ // Make sure that we get added to a basicblock
+ LeakDetector::addGarbageObject(this);
+
+ // If requested, insert this instruction into a basic block...
+ if (InsertBefore) {
+ assert(InsertBefore->getParent() &&
+ "Instruction to insert before is not in a basic block!");
+ InsertBefore->getParent()->getInstList().insert(InsertBefore, this);
+ }
+}
+
+Instruction::Instruction(const Type *ty, unsigned it, Use *Ops, unsigned NumOps,
+ BasicBlock *InsertAtEnd)
+ : User(ty, Value::InstructionVal + it, Ops, NumOps), Parent(0) {
+ // Make sure that we get added to a basicblock
+ LeakDetector::addGarbageObject(this);
-Instruction::Instruction(const Type *ty, unsigned it, const string &Name)
- : User(ty, Value::InstructionVal, Name) {
- Parent = 0;
- iType = it;
+ // append this instruction into the basic block
+ assert(InsertAtEnd && "Basic block to append to may not be NULL!");
+ InsertAtEnd->getInstList().push_back(this);
}
+
+// Out of line virtual method, so the vtable, etc has a home.
Instruction::~Instruction() {
- assert(getParent() == 0 && "Instruction still embeded in basic block!");
+ assert(Parent == 0 && "Instruction still linked in the program!");
+}
+
+
+void Instruction::setParent(BasicBlock *P) {
+ if (getParent()) {
+ if (!P) LeakDetector::addGarbageObject(this);
+ } else {
+ if (P) LeakDetector::removeGarbageObject(this);
+ }
+
+ Parent = P;
+}
+
+void Instruction::removeFromParent() {
+ getParent()->getInstList().remove(this);
+}
+
+void Instruction::eraseFromParent() {
+ getParent()->getInstList().erase(this);
+}
+
+/// moveBefore - Unlink this instruction from its current basic block and
+/// insert it into the basic block that MovePos lives in, right before
+/// MovePos.
+void Instruction::moveBefore(Instruction *MovePos) {
+ MovePos->getParent()->getInstList().splice(MovePos,getParent()->getInstList(),
+ this);
+}
+
+
+const char *Instruction::getOpcodeName(unsigned OpCode) {
+ switch (OpCode) {
+ // Terminators
+ case Ret: return "ret";
+ case Br: return "br";
+ case Switch: return "switch";
+ case Invoke: return "invoke";
+ case Unwind: return "unwind";
+ case Unreachable: return "unreachable";
+
+ // Standard binary operators...
+ case Add: return "add";
+ case Sub: return "sub";
+ case Mul: return "mul";
+ case UDiv: return "udiv";
+ case SDiv: return "sdiv";
+ case FDiv: return "fdiv";
+ case URem: return "urem";
+ case SRem: return "srem";
+ case FRem: return "frem";
+
+ // Logical operators...
+ case And: return "and";
+ case Or : return "or";
+ case Xor: return "xor";
+
+ // Memory instructions...
+ case Malloc: return "malloc";
+ case Free: return "free";
+ case Alloca: return "alloca";
+ case Load: return "load";
+ case Store: return "store";
+ case GetElementPtr: return "getelementptr";
+
+ // Convert instructions...
+ case Trunc: return "trunc";
+ case ZExt: return "zext";
+ case SExt: return "sext";
+ case FPTrunc: return "fptrunc";
+ case FPExt: return "fpext";
+ case FPToUI: return "fptoui";
+ case FPToSI: return "fptosi";
+ case UIToFP: return "uitofp";
+ case SIToFP: return "sitofp";
+ case IntToPtr: return "inttoptr";
+ case PtrToInt: return "ptrtoint";
+ case BitCast: return "bitcast";
+
+ // Other instructions...
+ case ICmp: return "icmp";
+ case FCmp: return "fcmp";
+ case PHI: return "phi";
+ case Select: return "select";
+ case Call: return "call";
+ case Shl: return "shl";
+ case LShr: return "lshr";
+ case AShr: return "ashr";
+ case VAArg: return "va_arg";
+ case ExtractElement: return "extractelement";
+ case InsertElement: return "insertelement";
+ case ShuffleVector: return "shufflevector";
+
+ default: return "<Invalid operator> ";
+ }
+
+ return 0;
+}
+
+/// isIdenticalTo - Return true if the specified instruction is exactly
+/// identical to the current one. This means that all operands match and any
+/// extra information (e.g. load is volatile) agree.
+bool Instruction::isIdenticalTo(Instruction *I) const {
+ if (getOpcode() != I->getOpcode() ||
+ getNumOperands() != I->getNumOperands() ||
+ getType() != I->getType())
+ return false;
+
+ // We have two instructions of identical opcode and #operands. Check to see
+ // if all operands are the same.
+ for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
+ if (getOperand(i) != I->getOperand(i))
+ return false;
+
+ // Check special state that is a part of some instructions.
+ if (const LoadInst *LI = dyn_cast<LoadInst>(this))
+ return LI->isVolatile() == cast<LoadInst>(I)->isVolatile();
+ if (const StoreInst *SI = dyn_cast<StoreInst>(this))
+ return SI->isVolatile() == cast<StoreInst>(I)->isVolatile();
+ if (const CmpInst *CI = dyn_cast<CmpInst>(this))
+ return CI->getPredicate() == cast<CmpInst>(I)->getPredicate();
+ if (const CallInst *CI = dyn_cast<CallInst>(this))
+ return CI->isTailCall() == cast<CallInst>(I)->isTailCall();
+ return true;
+}
+
+// isSameOperationAs
+bool Instruction::isSameOperationAs(Instruction *I) const {
+ if (getOpcode() != I->getOpcode() || getType() != I->getType() ||
+ getNumOperands() != I->getNumOperands())
+ return false;
+
+ // We have two instructions of identical opcode and #operands. Check to see
+ // if all operands are the same type
+ for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
+ if (getOperand(i)->getType() != I->getOperand(i)->getType())
+ return false;
+
+ // Check special state that is a part of some instructions.
+ if (const LoadInst *LI = dyn_cast<LoadInst>(this))
+ return LI->isVolatile() == cast<LoadInst>(I)->isVolatile();
+ if (const StoreInst *SI = dyn_cast<StoreInst>(this))
+ return SI->isVolatile() == cast<StoreInst>(I)->isVolatile();
+ if (const CmpInst *CI = dyn_cast<CmpInst>(this))
+ return CI->getPredicate() == cast<CmpInst>(I)->getPredicate();
+ if (const CallInst *CI = dyn_cast<CallInst>(this))
+ return CI->isTailCall() == cast<CallInst>(I)->isTailCall();
+
+ return true;
+}
+
+/// mayWriteToMemory - Return true if this instruction may modify memory.
+///
+bool Instruction::mayWriteToMemory() const {
+ switch (getOpcode()) {
+ default: return false;
+ case Instruction::Free:
+ case Instruction::Invoke:
+ case Instruction::Store:
+ case Instruction::VAArg:
+ return true;
+ case Instruction::Call:
+ return !cast<CallInst>(this)->onlyReadsMemory();
+ case Instruction::Load:
+ return cast<LoadInst>(this)->isVolatile();
+ }
+}
+
+/// isAssociative - Return true if the instruction is associative:
+///
+/// Associative operators satisfy: x op (y op z) === (x op y) op z)
+///
+/// In LLVM, the Add, Mul, And, Or, and Xor operators are associative, when not
+/// applied to floating point types.
+///
+bool Instruction::isAssociative(unsigned Opcode, const Type *Ty) {
+ if (Opcode == And || Opcode == Or || Opcode == Xor)
+ return true;
+
+ // Add/Mul reassociate unless they are FP or FP vectors.
+ if (Opcode == Add || Opcode == Mul)
+ return !Ty->isFPOrFPVector();
+ return 0;
+}
+
+/// isCommutative - Return true if the instruction is commutative:
+///
+/// Commutative operators satisfy: (x op y) === (y op x)
+///
+/// In LLVM, these are the associative operators, plus SetEQ and SetNE, when
+/// applied to any type.
+///
+bool Instruction::isCommutative(unsigned op) {
+ switch (op) {
+ case Add:
+ case Mul:
+ case And:
+ case Or:
+ case Xor:
+ return true;
+ default:
+ return false;
+ }
}
-// Specialize setName to take care of symbol table majik
-void Instruction::setName(const string &name) {
- BasicBlock *P = 0; Method *PP = 0;
- if ((P = getParent()) && (PP = P->getParent()) && hasName())
- PP->getSymbolTable()->remove(this);
- Value::setName(name);
- if (PP && hasName()) PP->getSymbolTableSure()->insert(this);
+/// isTrappingInstruction - Return true if the instruction may trap.
+///
+bool Instruction::isTrapping(unsigned op) {
+ switch(op) {
+ case UDiv:
+ case SDiv:
+ case FDiv:
+ case URem:
+ case SRem:
+ case FRem:
+ case Load:
+ case Store:
+ case Call:
+ case Invoke:
+ return true;
+ default:
+ return false;
+ }
}
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