mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-19 19:29:31 +00:00
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21427 91177308-0d34-0410-b5e6-96231b3b80d8
218 lines
6.1 KiB
C++
218 lines
6.1 KiB
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 "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);
|
|
|
|
// 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,
|
|
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()) {
|
|
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);
|
|
}
|
|
|
|
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 Div: return "div";
|
|
case Rem: return "rem";
|
|
|
|
// 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 GetElementPtr: return "getelementptr";
|
|
|
|
// 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 VANext: return "vanext";
|
|
case VAArg: return "vaarg";
|
|
|
|
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 VANextInst *VAN = dyn_cast<VANextInst>(this))
|
|
return VAN->getArgType() == cast<VANextInst>(I)->getArgType();
|
|
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;
|
|
}
|
|
}
|