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//===-- TargetInstrInfo.cpp - Target Instruction Information --------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the TargetInstrInfo class.
//
//===----------------------------------------------------------------------===//
#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Target/TargetRegisterInfo.h"
#include "llvm/Support/ErrorHandling.h"
using namespace llvm;
TargetInstrInfo::TargetInstrInfo(const TargetInstrDesc* Desc,
unsigned numOpcodes)
: Descriptors(Desc), NumOpcodes(numOpcodes) {
}
TargetInstrInfo::~TargetInstrInfo() {
}
/// insertNoop - Insert a noop into the instruction stream at the specified
/// point.
void TargetInstrInfo::insertNoop(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MI) const {
llvm_unreachable("Target didn't implement insertNoop!");
}
bool TargetInstrInfo::isUnpredicatedTerminator(const MachineInstr *MI) const {
const TargetInstrDesc &TID = MI->getDesc();
if (!TID.isTerminator()) return false;
// Conditional branch is a special case.
if (TID.isBranch() && !TID.isBarrier())
return true;
if (!TID.isPredicable())
return true;
return !isPredicated(MI);
}
/// getRegClass - Get the register class for the operand, handling resolution
/// of "symbolic" pointer register classes etc. If this is not a register
/// operand, this returns null.
const TargetRegisterClass *
TargetOperandInfo::getRegClass(const TargetRegisterInfo *TRI) const {
if (isLookupPtrRegClass())
return TRI->getPointerRegClass(RegClass);
return TRI->getRegClass(RegClass);
}
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