-//===-- 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/Instructions.h"
#include "llvm/Function.h"
#include "llvm/SymbolTable.h"
#include "llvm/Type.h"
-#include "Support/LeakDetector.h"
-
-Instruction::Instruction(const Type *ty, unsigned it, const std::string &Name,
- Instruction *InsertBefore)
- : User(ty, Value::InstructionVal, Name) {
- Parent = 0;
- iType = it;
+#include "llvm/Support/LeakDetector.h"
+using namespace llvm;
+Instruction::Instruction(const Type *ty, unsigned it, Use *Ops, unsigned NumOps,
+ const std::string &Name, Instruction *InsertBefore)
+ : User(ty, Value::InstructionVal + it, Ops, NumOps, Name), Parent(0) {
// Make sure that we get added to a basicblock
LeakDetector::addGarbageObject(this);
}
}
+Instruction::Instruction(const Type *ty, unsigned it, Use *Ops, unsigned NumOps,
+ const std::string &Name, BasicBlock *InsertAtEnd)
+ : User(ty, Value::InstructionVal + it, Ops, NumOps, Name), Parent(0) {
+ // Make sure that we get added to a basicblock
+ LeakDetector::addGarbageObject(this);
+
+ // append this instruction into the basic block
+ assert(InsertAtEnd && "Basic block to append to may not be NULL!");
+ InsertAtEnd->getInstList().push_back(this);
+}
+
+void Instruction::setOpcode(unsigned opc) {
+ setValueType(Value::InstructionVal + opc);
+}
+
void Instruction::setParent(BasicBlock *P) {
- if (getParent())
- LeakDetector::addGarbageObject(this);
+ if (getParent()) {
+ if (!P) LeakDetector::addGarbageObject(this);
+ } else {
+ if (P) LeakDetector::removeGarbageObject(this);
+ }
Parent = P;
+}
+
+void Instruction::removeFromParent() {
+ getParent()->getInstList().remove(this);
+}
- if (getParent())
- LeakDetector::removeGarbageObject(this);
+void Instruction::eraseFromParent() {
+ getParent()->getInstList().erase(this);
}
-// Specialize setName to take care of symbol table majik
-void Instruction::setName(const std::string &name, SymbolTable *ST) {
- BasicBlock *P = 0; Function *PP = 0;
- assert((ST == 0 || !getParent() || !getParent()->getParent() ||
- ST == getParent()->getParent()->getSymbolTable()) &&
- "Invalid symtab argument!");
- if ((P = getParent()) && (PP = P->getParent()) && hasName())
- PP->getSymbolTable()->remove(this);
- Value::setName(name);
- if (PP && hasName()) PP->getSymbolTableSure()->insert(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);
}
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 SetGT: return "setgt";
case SetEQ: return "seteq";
case SetNE: return "setne";
-
+
// Memory instructions...
case Malloc: return "malloc";
case Free: return "free";
case Load: return "load";
case Store: return "store";
case GetElementPtr: return "getelementptr";
-
+
// Other instructions...
- case PHINode: return "phi";
+ case PHI: return "phi";
case Cast: return "cast";
+ case Select: return "select";
case Call: return "call";
case Shl: return "shl";
case Shr: return "shr";
-
+ case VAArg: return "va_arg";
+ case ExtractElement: return "extractelement";
+ case InsertElement: return "insertelement";
+
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 CallInst *CI = dyn_cast<CallInst>(this))
+ return CI->isTailCall() == cast<CallInst>(I)->isTailCall();
+ return true;
+}
+
+
+/// 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 == Add || Opcode == Mul ||
+ Opcode == And || Opcode == Or || Opcode == Xor) {
+ // Floating point operations do not associate!
+ return !Ty->isFloatingPoint();
+ }
+ 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:
+ case SetEQ:
+ case SetNE:
+ return true;
+ default:
+ return false;
+ }
+}
+
+/// isRelational - Return true if the instruction is a Set* instruction:
+///
+bool Instruction::isRelational(unsigned op) {
+ switch (op) {
+ case SetEQ:
+ case SetNE:
+ case SetLT:
+ case SetGT:
+ case SetLE:
+ case SetGE:
+ return true;
+ }
+ return false;
+}
+
+
+
+/// isTrappingInstruction - Return true if the instruction may trap.
+///
+bool Instruction::isTrapping(unsigned op) {
+ switch(op) {
+ case Div:
+ case Rem:
+ case Load:
+ case Store:
+ case Call:
+ case Invoke:
+ return true;
+ default:
+ return false;
+ }
+}
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