X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FVMCore%2FInstruction.cpp;h=e0764e494b2eb085793d417c6739f4df38ccafe7;hb=b983d67465a939c43173e381f9063d9d9245f45b;hp=d4c44741e5cecf13cf431b8a7df59675bf8838b9;hpb=dec628eead87b20773c98a00830580df211acc98;p=oota-llvm.git diff --git a/lib/VMCore/Instruction.cpp b/lib/VMCore/Instruction.cpp index d4c44741e5c..e0764e494b2 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. // //===----------------------------------------------------------------------===// // @@ -14,11 +14,12 @@ #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, - const std::string &Name, Instruction *InsertBefore) + Instruction *InsertBefore) : User(ty, Value::InstructionVal + it, Ops, NumOps), Parent(0) { // Make sure that we get added to a basicblock LeakDetector::addGarbageObject(this); @@ -29,11 +30,10 @@ Instruction::Instruction(const Type *ty, unsigned it, Use *Ops, unsigned NumOps, "Instruction to insert before is not in a basic block!"); InsertBefore->getParent()->getInstList().insert(InsertBefore, this); } - setName(Name); } Instruction::Instruction(const Type *ty, unsigned it, Use *Ops, unsigned NumOps, - const std::string &Name, BasicBlock *InsertAtEnd) + BasicBlock *InsertAtEnd) : User(ty, Value::InstructionVal + it, Ops, NumOps), Parent(0) { // Make sure that we get added to a basicblock LeakDetector::addGarbageObject(this); @@ -41,9 +41,9 @@ Instruction::Instruction(const Type *ty, unsigned it, Use *Ops, unsigned NumOps, // append this instruction into the basic block assert(InsertAtEnd && "Basic block to append to may not be NULL!"); InsertAtEnd->getInstList().push_back(this); - setName(Name); } + // Out of line virtual method, so the vtable, etc has a home. Instruction::~Instruction() { assert(Parent == 0 && "Instruction still linked in the program!"); @@ -68,6 +68,18 @@ 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); +} + +/// insertAfter - Insert an unlinked instructions into a basic block +/// immediately after the specified instruction. +void Instruction::insertAfter(Instruction *InsertPos) { + InsertPos->getParent()->getInstList().insertAfter(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. @@ -89,8 +101,11 @@ const char *Instruction::getOpcodeName(unsigned OpCode) { // Standard binary operators... case Add: return "add"; + case FAdd: return "fadd"; case Sub: return "sub"; + case FSub: return "fsub"; case Mul: return "mul"; + case FMul: return "fmul"; case UDiv: return "udiv"; case SDiv: return "sdiv"; case FDiv: return "fdiv"; @@ -128,6 +143,8 @@ const char *Instruction::getOpcodeName(unsigned OpCode) { // Other instructions... 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"; @@ -138,6 +155,8 @@ const char *Instruction::getOpcodeName(unsigned OpCode) { case ExtractElement: return "extractelement"; case InsertElement: return "insertelement"; case ShuffleVector: return "shufflevector"; + case ExtractValue: return "extractvalue"; + case InsertValue: return "insertvalue"; default: return " "; } @@ -148,7 +167,7 @@ const char *Instruction::getOpcodeName(unsigned OpCode) { /// 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 { +bool Instruction::isIdenticalTo(const Instruction *I) const { if (getOpcode() != I->getOpcode() || getNumOperands() != I->getNumOperands() || getType() != I->getType()) @@ -162,20 +181,49 @@ bool Instruction::isIdenticalTo(Instruction *I) const { // Check special state that is a part of some instructions. if (const LoadInst *LI = dyn_cast(this)) - return LI->isVolatile() == cast(I)->isVolatile(); + return LI->isVolatile() == cast(I)->isVolatile() && + LI->getAlignment() == cast(I)->getAlignment(); if (const StoreInst *SI = dyn_cast(this)) - return SI->isVolatile() == cast(I)->isVolatile(); + return SI->isVolatile() == cast(I)->isVolatile() && + SI->getAlignment() == cast(I)->getAlignment(); 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 CI->isTailCall() == cast(I)->isTailCall() && + CI->getCallingConv() == cast(I)->getCallingConv() && + CI->getAttributes().getRawPointer() == + cast(I)->getAttributes().getRawPointer(); + if (const InvokeInst *CI = dyn_cast(this)) + return CI->getCallingConv() == cast(I)->getCallingConv() && + CI->getAttributes().getRawPointer() == + cast(I)->getAttributes().getRawPointer(); + if (const InsertValueInst *IVI = dyn_cast(this)) { + if (IVI->getNumIndices() != cast(I)->getNumIndices()) + return false; + for (unsigned i = 0, e = IVI->getNumIndices(); i != e; ++i) + if (IVI->idx_begin()[i] != cast(I)->idx_begin()[i]) + return false; + return true; + } + if (const ExtractValueInst *EVI = dyn_cast(this)) { + if (EVI->getNumIndices() != cast(I)->getNumIndices()) + return false; + for (unsigned i = 0, e = EVI->getNumIndices(); i != e; ++i) + if (EVI->idx_begin()[i] != cast(I)->idx_begin()[i]) + return false; + return true; + } + return true; } // isSameOperationAs -bool Instruction::isSameOperationAs(Instruction *I) const { - if (getOpcode() != I->getOpcode() || getType() != I->getType() || - getNumOperands() != I->getNumOperands()) +// This should be kept in sync with isEquivalentOperation in +// lib/Transforms/IPO/MergeFunctions.cpp. +bool Instruction::isSameOperationAs(const 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 @@ -186,33 +234,115 @@ bool Instruction::isSameOperationAs(Instruction *I) const { // Check special state that is a part of some instructions. if (const LoadInst *LI = dyn_cast(this)) - return LI->isVolatile() == cast(I)->isVolatile(); + return LI->isVolatile() == cast(I)->isVolatile() && + LI->getAlignment() == cast(I)->getAlignment(); if (const StoreInst *SI = dyn_cast(this)) - return SI->isVolatile() == cast(I)->isVolatile(); + return SI->isVolatile() == cast(I)->isVolatile() && + SI->getAlignment() == cast(I)->getAlignment(); 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 CI->isTailCall() == cast(I)->isTailCall() && + CI->getCallingConv() == cast(I)->getCallingConv() && + CI->getAttributes().getRawPointer() == + cast(I)->getAttributes().getRawPointer(); + if (const InvokeInst *CI = dyn_cast(this)) + return CI->getCallingConv() == cast(I)->getCallingConv() && + CI->getAttributes().getRawPointer() == + cast(I)->getAttributes().getRawPointer(); + if (const InsertValueInst *IVI = dyn_cast(this)) { + if (IVI->getNumIndices() != cast(I)->getNumIndices()) + return false; + for (unsigned i = 0, e = IVI->getNumIndices(); i != e; ++i) + if (IVI->idx_begin()[i] != cast(I)->idx_begin()[i]) + return false; + return true; + } + if (const ExtractValueInst *EVI = dyn_cast(this)) { + if (EVI->getNumIndices() != cast(I)->getNumIndices()) + return false; + for (unsigned i = 0, e = EVI->getNumIndices(); i != e; ++i) + if (EVI->idx_begin()[i] != cast(I)->idx_begin()[i]) + return false; + return true; + } 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; + } + + if (PN->getIncomingBlock(UI) != 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(); + } +} + +/// mayThrow - Return true if this instruction may throw an exception. +/// +bool Instruction::mayThrow() const { + if (const CallInst *CI = dyn_cast(this)) + return !CI->doesNotThrow(); + return false; +} /// isAssociative - Return true if the instruction is associative: /// -/// Associative operators satisfy: x op (y op z) === (x op y) op z) +/// 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. +/// In LLVM, the Add, Mul, And, Or, and Xor operators are associative. /// 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; + return Opcode == And || Opcode == Or || Opcode == Xor || + Opcode == Add || Opcode == Mul; } /// isCommutative - Return true if the instruction is commutative: @@ -225,7 +355,9 @@ bool Instruction::isAssociative(unsigned Opcode, const Type *Ty) { bool Instruction::isCommutative(unsigned op) { switch (op) { case Add: + case FAdd: case Mul: + case FMul: case And: case Or: case Xor: @@ -235,7 +367,7 @@ bool Instruction::isCommutative(unsigned op) { } } -/// isTrappingInstruction - Return true if the instruction may trap. +/// isTrapping - Return true if the instruction may trap. /// bool Instruction::isTrapping(unsigned op) { switch(op) { @@ -249,6 +381,7 @@ bool Instruction::isTrapping(unsigned op) { case Store: case Call: case Invoke: + case VAArg: return true; default: return false;