mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-30 17:33:24 +00:00
749c6f6b5e
Make MachineInstr::getDesc return a reference instead of a pointer, since it can never be null. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45695 91177308-0d34-0410-b5e6-96231b3b80d8
51 lines
1.5 KiB
C++
51 lines
1.5 KiB
C++
//===-- 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/Constant.h"
|
|
#include "llvm/DerivedTypes.h"
|
|
using namespace llvm;
|
|
|
|
/// findTiedToSrcOperand - Returns the operand that is tied to the specified
|
|
/// dest operand. Returns -1 if there isn't one.
|
|
int TargetInstrDesc::findTiedToSrcOperand(unsigned OpNum) const {
|
|
for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
|
|
if (i == OpNum)
|
|
continue;
|
|
if (getOperandConstraint(i, TOI::TIED_TO) == (int)OpNum)
|
|
return i;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
|
|
TargetInstrInfo::TargetInstrInfo(const TargetInstrDesc* Desc,
|
|
unsigned numOpcodes)
|
|
: Descriptors(Desc), NumOpcodes(numOpcodes) {
|
|
}
|
|
|
|
TargetInstrInfo::~TargetInstrInfo() {
|
|
}
|
|
|
|
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);
|
|
}
|