mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-24 19:52:54 +01:00
139 lines
3.7 KiB
C++
139 lines
3.7 KiB
C++
//===-- Instruction.cpp - Implement the Instruction class --------*- C++ -*--=//
|
|
//
|
|
// This file implements the Instruction class for the VMCore library.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#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;
|
|
|
|
// 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);
|
|
}
|
|
}
|
|
|
|
void Instruction::setParent(BasicBlock *P) {
|
|
if (getParent())
|
|
LeakDetector::addGarbageObject(this);
|
|
|
|
Parent = P;
|
|
|
|
if (getParent())
|
|
LeakDetector::removeGarbageObject(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->getSymbolTable().insert(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";
|
|
|
|
// 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 PHINode: return "phi";
|
|
case Cast: return "cast";
|
|
case Call: return "call";
|
|
case Shl: return "shl";
|
|
case Shr: return "shr";
|
|
|
|
default: return "<Invalid operator> ";
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/// 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 satistify: (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;
|
|
}
|
|
}
|