X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FVMCore%2FInstruction.cpp;h=5449714280d3972732366b5e2cb3e037b40e214a;hb=ba4d45737f6e1094195823b33fb9868570ae1701;hp=c5e8e303545d23869d8398e3472b0f4e14c16abb;hpb=1628cec4d7fce310d9cde0bcc73997e5a71692c4;p=oota-llvm.git diff --git a/lib/VMCore/Instruction.cpp b/lib/VMCore/Instruction.cpp index c5e8e303545..5449714280d 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 +11,18 @@ // //===----------------------------------------------------------------------===// -#include "llvm/Instructions.h" -#include "llvm/Function.h" -#include "llvm/SymbolTable.h" +#include "llvm/Instruction.h" #include "llvm/Type.h" +#include "llvm/Instructions.h" +#include "llvm/Constants.h" +#include "llvm/Module.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::Instruction(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); @@ -32,9 +34,9 @@ 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) { +Instruction::Instruction(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); @@ -43,16 +45,15 @@ Instruction::Instruction(const Type *ty, unsigned it, Use *Ops, unsigned NumOps, InsertAtEnd->getInstList().push_back(this); } + // Out of line virtual method, so the vtable, etc has a home. Instruction::~Instruction() { assert(Parent == 0 && "Instruction still linked in the program!"); + if (hasMetadataHashEntry()) + clearMetadataHashEntries(); } -void Instruction::setOpcode(unsigned opc) { - setValueType(Value::InstructionVal + opc); -} - void Instruction::setParent(BasicBlock *P) { if (getParent()) { if (!P) LeakDetector::addGarbageObject(this); @@ -71,6 +72,18 @@ 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. @@ -86,62 +99,86 @@ const char *Instruction::getOpcodeName(unsigned OpCode) { case Ret: return "ret"; case Br: return "br"; case Switch: return "switch"; + case IndirectBr: return "indirectbr"; case Invoke: return "invoke"; - case Unwind: return "unwind"; + case Resume: return "resume"; case Unreachable: return "unreachable"; // 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"; - case Rem: return "rem"; + 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"; case Alloca: return "alloca"; case Load: return "load"; case Store: return "store"; + case AtomicCmpXchg: return "cmpxchg"; + case AtomicRMW: return "atomicrmw"; + case Fence: return "fence"; 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 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 InsertElement: return "insertelement"; + case ShuffleVector: return "shufflevector"; + case ExtractValue: return "extractvalue"; + case InsertValue: return "insertvalue"; + case LandingPad: return "landingpad"; default: return " "; } - - 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 { +bool Instruction::isIdenticalTo(const Instruction *I) const { + return isIdenticalToWhenDefined(I) && + SubclassOptionalData == I->SubclassOptionalData; +} + +/// isIdenticalToWhenDefined - This is like isIdenticalTo, except that it +/// ignores the SubclassOptionalData flags, which specify conditions +/// under which the instruction's result is undefined. +bool Instruction::isIdenticalToWhenDefined(const Instruction *I) const { if (getOpcode() != I->getOpcode() || getNumOperands() != I->getNumOperands() || getType() != I->getType()) @@ -155,29 +192,178 @@ 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() && + LI->getOrdering() == cast(I)->getOrdering() && + LI->getSynchScope() == cast(I)->getSynchScope(); + if (const StoreInst *SI = dyn_cast(this)) + return SI->isVolatile() == cast(I)->isVolatile() && + SI->getAlignment() == cast(I)->getAlignment() && + SI->getOrdering() == cast(I)->getOrdering() && + SI->getSynchScope() == cast(I)->getSynchScope(); + 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() && + CI->getCallingConv() == cast(I)->getCallingConv() && + CI->getAttributes() == cast(I)->getAttributes(); + if (const InvokeInst *CI = dyn_cast(this)) + return CI->getCallingConv() == cast(I)->getCallingConv() && + CI->getAttributes() == cast(I)->getAttributes(); + if (const InsertValueInst *IVI = dyn_cast(this)) + return IVI->getIndices() == cast(I)->getIndices(); + if (const ExtractValueInst *EVI = dyn_cast(this)) + return EVI->getIndices() == cast(I)->getIndices(); + if (const FenceInst *FI = dyn_cast(this)) + return FI->getOrdering() == cast(FI)->getOrdering() && + FI->getSynchScope() == cast(FI)->getSynchScope(); + if (const AtomicCmpXchgInst *CXI = dyn_cast(this)) + return CXI->isVolatile() == cast(I)->isVolatile() && + CXI->getOrdering() == cast(I)->getOrdering() && + CXI->getSynchScope() == cast(I)->getSynchScope(); + if (const AtomicRMWInst *RMWI = dyn_cast(this)) + return RMWI->getOperation() == cast(I)->getOperation() && + RMWI->isVolatile() == cast(I)->isVolatile() && + RMWI->getOrdering() == cast(I)->getOrdering() && + RMWI->getSynchScope() == cast(I)->getSynchScope(); + + return true; +} + +// isSameOperationAs +// 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 + // 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() && + LI->getAlignment() == cast(I)->getAlignment() && + LI->getOrdering() == cast(I)->getOrdering() && + LI->getSynchScope() == cast(I)->getSynchScope(); if (const StoreInst *SI = dyn_cast(this)) - return SI->isVolatile() == cast(I)->isVolatile(); + return SI->isVolatile() == cast(I)->isVolatile() && + SI->getAlignment() == cast(I)->getAlignment() && + SI->getOrdering() == cast(I)->getOrdering() && + SI->getSynchScope() == cast(I)->getSynchScope(); + 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() == cast(I)->getAttributes(); + if (const InvokeInst *CI = dyn_cast(this)) + return CI->getCallingConv() == cast(I)->getCallingConv() && + CI->getAttributes() == + cast(I)->getAttributes(); + if (const InsertValueInst *IVI = dyn_cast(this)) + return IVI->getIndices() == cast(I)->getIndices(); + if (const ExtractValueInst *EVI = dyn_cast(this)) + return EVI->getIndices() == cast(I)->getIndices(); + if (const FenceInst *FI = dyn_cast(this)) + return FI->getOrdering() == cast(I)->getOrdering() && + FI->getSynchScope() == cast(I)->getSynchScope(); + if (const AtomicCmpXchgInst *CXI = dyn_cast(this)) + return CXI->isVolatile() == cast(I)->isVolatile() && + CXI->getOrdering() == cast(I)->getOrdering() && + CXI->getSynchScope() == cast(I)->getSynchScope(); + if (const AtomicRMWInst *RMWI = dyn_cast(this)) + return RMWI->getOperation() == cast(I)->getOperation() && + RMWI->isVolatile() == cast(I)->isVolatile() && + RMWI->getOrdering() == cast(I)->getOrdering() && + RMWI->getSynchScope() == cast(I)->getSynchScope(); + 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 (const_use_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 User *U = *UI; + const PHINode *PN = dyn_cast(U); + if (PN == 0) { + if (cast(U)->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::VAArg: + case Instruction::Load: + case Instruction::Fence: // FIXME: refine definition of mayReadFromMemory + case Instruction::AtomicCmpXchg: + case Instruction::AtomicRMW: + return true; + case Instruction::Call: + return !cast(this)->doesNotAccessMemory(); + case Instruction::Invoke: + return !cast(this)->doesNotAccessMemory(); + case Instruction::Store: + return !cast(this)->isUnordered(); + } +} + +/// mayWriteToMemory - Return true if this instruction may modify memory. +/// +bool Instruction::mayWriteToMemory() const { + switch (getOpcode()) { + default: return false; + case Instruction::Fence: // FIXME: refine definition of mayWriteToMemory + case Instruction::Store: + case Instruction::VAArg: + case Instruction::AtomicCmpXchg: + case Instruction::AtomicRMW: + return true; + case Instruction::Call: + return !cast(this)->onlyReadsMemory(); + case Instruction::Invoke: + return !cast(this)->onlyReadsMemory(); + case Instruction::Load: + return !cast(this)->isUnordered(); + } +} + +/// 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 isa(this); +} /// 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 == Add || Opcode == Mul || - Opcode == And || Opcode == Or || Opcode == Xor) { - // Floating point operations do not associate! - return !Ty->isFloatingPoint(); - } - return 0; +bool Instruction::isAssociative(unsigned Opcode) { + return Opcode == And || Opcode == Or || Opcode == Xor || + Opcode == Add || Opcode == Mul; } /// isCommutative - Return true if the instruction is commutative: @@ -190,49 +376,31 @@ 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: - case SetEQ: - case SetNE: return true; default: return false; } } -/// isComparison - Return true if the instruction is a Set* instruction: -/// -bool Instruction::isComparison(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 UDiv: - case SDiv: - case FDiv: - case Rem: - case Load: - case Store: - case Call: - case Invoke: - return true; - default: - return false; - } +Instruction *Instruction::clone() const { + Instruction *New = clone_impl(); + New->SubclassOptionalData = SubclassOptionalData; + if (!hasMetadata()) + return New; + + // Otherwise, enumerate and copy over metadata from the old instruction to the + // new one. + SmallVector, 4> TheMDs; + getAllMetadataOtherThanDebugLoc(TheMDs); + for (unsigned i = 0, e = TheMDs.size(); i != e; ++i) + New->setMetadata(TheMDs[i].first, TheMDs[i].second); + + New->setDebugLoc(getDebugLoc()); + return New; }