lib/Target/TargetInstrInfo.cpp

   1 //===-- TargetInstrInfo.cpp - Target Instruction Information --------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This file implements the TargetInstrInfo class.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "llvm/Target/TargetInstrInfo.h"
  15 #include "llvm/Constant.h"
  16 #include "llvm/DerivedTypes.h"
  17 using namespace llvm;
  18
  19 TargetInstrInfo::TargetInstrInfo(const TargetInstrDesc* Desc,
  20                                  unsigned numOpcodes)
  21   : Descriptors(Desc), NumOpcodes(numOpcodes) {
  22 }
  23
  24 TargetInstrInfo::~TargetInstrInfo() {
  25 }
  26
  27 bool TargetInstrInfo::isUnpredicatedTerminator(const MachineInstr *MI) const {
  28   const TargetInstrDesc &TID = MI->getDesc();
  29   if (!TID.isTerminator()) return false;
  30
  31   // Conditional branch is a special case.
  32   if (TID.isBranch() && !TID.isBarrier())
  33     return true;
  34   if (!TID.isPredicable())
  35     return true;
  36   return !isPredicated(MI);
  37 }