X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FVMCore%2FInstruction.cpp;h=e8738d2ba72bd755ab7427f8987834bac0781558;hb=51cd9d6e073932fcb37f1857c66249d6c7d368ee;hp=342614ef475ef04ad1b3fc5ae69c1fb5649e797d;hpb=0fe34d89126c594e0e8378d978a593350189fedf;p=oota-llvm.git diff --git a/lib/VMCore/Instruction.cpp b/lib/VMCore/Instruction.cpp index 342614ef475..e8738d2ba72 100644 --- a/lib/VMCore/Instruction.cpp +++ b/lib/VMCore/Instruction.cpp @@ -2,8 +2,8 @@ // // 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 is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // @@ -11,16 +11,16 @@ // //===----------------------------------------------------------------------===// +#include "llvm/Type.h" #include "llvm/Instructions.h" #include "llvm/Function.h" -#include "llvm/SymbolTable.h" -#include "llvm/Type.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, - const std::string &Name, Instruction *InsertBefore) - : User(ty, Value::InstructionVal + it, Ops, NumOps, Name), Parent(0) { + Instruction *InsertBefore) + : User(ty, Value::InstructionVal + it, Ops, NumOps), Parent(0) { // Make sure that we get added to a basicblock LeakDetector::addGarbageObject(this); @@ -33,8 +33,8 @@ Instruction::Instruction(const Type *ty, unsigned it, Use *Ops, unsigned NumOps, } 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) { + BasicBlock *InsertAtEnd) + : User(ty, Value::InstructionVal + it, Ops, NumOps), Parent(0) { // Make sure that we get added to a basicblock LeakDetector::addGarbageObject(this); @@ -43,10 +43,13 @@ Instruction::Instruction(const Type *ty, unsigned it, Use *Ops, unsigned NumOps, InsertAtEnd->getInstList().push_back(this); } -void Instruction::setOpcode(unsigned opc) { - setValueType(Value::InstructionVal + opc); + +// Out of line virtual method, so the vtable, etc has a home. +Instruction::~Instruction() { + assert(Parent == 0 && "Instruction still linked in the program!"); } + void Instruction::setParent(BasicBlock *P) { if (getParent()) { if (!P) LeakDetector::addGarbageObject(this); @@ -65,6 +68,12 @@ void Instruction::eraseFromParent() { getParent()->getInstList().erase(this); } +/// insertBefore - Insert an unlinked instructions into a basic block +/// immediately before the specified instruction. +void Instruction::insertBefore(Instruction *InsertPos) { + InsertPos->getParent()->getInstList().insert(InsertPos, this); +} + /// moveBefore - Unlink this instruction from its current basic block and /// insert it into the basic block that MovePos lives in, right before /// MovePos. @@ -88,22 +97,18 @@ const char *Instruction::getOpcodeName(unsigned OpCode) { case Add: return "add"; case Sub: return "sub"; case Mul: return "mul"; - case Div: return "div"; - case Rem: return "rem"; + 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"; - // SetCC operators... - case SetLE: return "setle"; - case SetGE: return "setge"; - case SetLT: return "setlt"; - case SetGT: return "setgt"; - case SetEQ: return "seteq"; - case SetNE: return "setne"; - // Memory instructions... case Malloc: return "malloc"; case Free: return "free"; @@ -112,14 +117,38 @@ const char *Instruction::getOpcodeName(unsigned OpCode) { 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 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 ICmp: return "icmp"; + case FCmp: return "fcmp"; + case VICmp: return "vicmp"; + case VFCmp: return "vfcmp"; + 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"; + case GetResult: return "getresult"; + case ExtractValue: return "extractvalue"; + case InsertValue: return "insertvalue"; default: return " "; } @@ -147,11 +176,94 @@ bool Instruction::isIdenticalTo(Instruction *I) const { return LI->isVolatile() == cast(I)->isVolatile(); if (const StoreInst *SI = dyn_cast(this)) return SI->isVolatile() == cast(I)->isVolatile(); + if (const CmpInst *CI = dyn_cast(this)) + return CI->getPredicate() == cast(I)->getPredicate(); + if (const CallInst *CI = dyn_cast(this)) + return CI->isTailCall() == cast(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(this)) + return LI->isVolatile() == cast(I)->isVolatile(); + if (const StoreInst *SI = dyn_cast(this)) + return SI->isVolatile() == cast(I)->isVolatile(); + if (const CmpInst *CI = dyn_cast(this)) + return CI->getPredicate() == cast(I)->getPredicate(); if (const CallInst *CI = dyn_cast(this)) return CI->isTailCall() == cast(I)->isTailCall(); + return true; } +/// isUsedOutsideOfBlock - Return true if there are any uses of I outside of the +/// specified block. Note that PHI nodes are considered to evaluate their +/// operands in the corresponding predecessor block. +bool Instruction::isUsedOutsideOfBlock(const BasicBlock *BB) const { + for (use_const_iterator UI = use_begin(), E = use_end(); UI != E; ++UI) { + // PHI nodes uses values in the corresponding predecessor block. For other + // instructions, just check to see whether the parent of the use matches up. + const PHINode *PN = dyn_cast(*UI); + if (PN == 0) { + if (cast(*UI)->getParent() != BB) + return true; + continue; + } + + unsigned UseOperand = UI.getOperandNo(); + if (PN->getIncomingBlock(UseOperand/2) != BB) + return true; + } + return false; +} + +/// mayReadFromMemory - Return true if this instruction may read memory. +/// +bool Instruction::mayReadFromMemory() const { + switch (getOpcode()) { + default: return false; + case Instruction::Free: + case Instruction::VAArg: + case Instruction::Load: + return true; + case Instruction::Call: + return !cast(this)->doesNotAccessMemory(); + case Instruction::Invoke: + return !cast(this)->doesNotAccessMemory(); + case Instruction::Store: + return cast(this)->isVolatile(); + } +} + +/// mayWriteToMemory - Return true if this instruction may modify memory. +/// +bool Instruction::mayWriteToMemory() const { + switch (getOpcode()) { + default: return false; + case Instruction::Free: + case Instruction::Store: + case Instruction::VAArg: + return true; + case Instruction::Call: + return !cast(this)->onlyReadsMemory(); + case Instruction::Invoke: + return !cast(this)->onlyReadsMemory(); + case Instruction::Load: + return cast(this)->isVolatile(); + } +} /// isAssociative - Return true if the instruction is associative: /// @@ -161,11 +273,12 @@ bool Instruction::isIdenticalTo(Instruction *I) const { /// 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(); - } + 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; } @@ -183,41 +296,27 @@ bool Instruction::isCommutative(unsigned op) { 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 UDiv: + case SDiv: + case FDiv: + case URem: + case SRem: + case FRem: case Load: case Store: case Call: case Invoke: + case VAArg: return true; default: return false;