+bool Filler::needsUnimp(MachineBasicBlock::iterator I, unsigned &StructSize)
+{
+ if (!I->isCall())
+ return false;
+
+ unsigned structSizeOpNum = 0;
+ switch (I->getOpcode()) {
+ default: llvm_unreachable("Unknown call opcode.");
+ case SP::CALL: structSizeOpNum = 1; break;
+ case SP::CALLrr:
+ case SP::CALLri: structSizeOpNum = 2; break;
+ case SP::TLS_CALL: return false;
+ }
+
+ const MachineOperand &MO = I->getOperand(structSizeOpNum);
+ if (!MO.isImm())
+ return false;
+ StructSize = MO.getImm();
+ return true;
+}
+
+static bool combineRestoreADD(MachineBasicBlock::iterator RestoreMI,
+ MachineBasicBlock::iterator AddMI,
+ const TargetInstrInfo *TII)
+{
+ // Before: add <op0>, <op1>, %i[0-7]
+ // restore %g0, %g0, %i[0-7]
+ //
+ // After : restore <op0>, <op1>, %o[0-7]
+
+ unsigned reg = AddMI->getOperand(0).getReg();
+ if (reg < SP::I0 || reg > SP::I7)
+ return false;
+
+ // Erase RESTORE.
+ RestoreMI->eraseFromParent();
+
+ // Change ADD to RESTORE.
+ AddMI->setDesc(TII->get((AddMI->getOpcode() == SP::ADDrr)
+ ? SP::RESTORErr
+ : SP::RESTOREri));
+
+ // Map the destination register.
+ AddMI->getOperand(0).setReg(reg - SP::I0 + SP::O0);
+
+ return true;
+}
+
+static bool combineRestoreOR(MachineBasicBlock::iterator RestoreMI,
+ MachineBasicBlock::iterator OrMI,
+ const TargetInstrInfo *TII)
+{
+ // Before: or <op0>, <op1>, %i[0-7]
+ // restore %g0, %g0, %i[0-7]
+ // and <op0> or <op1> is zero,
+ //
+ // After : restore <op0>, <op1>, %o[0-7]
+
+ unsigned reg = OrMI->getOperand(0).getReg();
+ if (reg < SP::I0 || reg > SP::I7)
+ return false;
+
+ // check whether it is a copy.
+ if (OrMI->getOpcode() == SP::ORrr
+ && OrMI->getOperand(1).getReg() != SP::G0
+ && OrMI->getOperand(2).getReg() != SP::G0)
+ return false;
+
+ if (OrMI->getOpcode() == SP::ORri
+ && OrMI->getOperand(1).getReg() != SP::G0
+ && (!OrMI->getOperand(2).isImm() || OrMI->getOperand(2).getImm() != 0))
+ return false;
+
+ // Erase RESTORE.
+ RestoreMI->eraseFromParent();
+
+ // Change OR to RESTORE.
+ OrMI->setDesc(TII->get((OrMI->getOpcode() == SP::ORrr)
+ ? SP::RESTORErr
+ : SP::RESTOREri));
+
+ // Map the destination register.
+ OrMI->getOperand(0).setReg(reg - SP::I0 + SP::O0);
+
+ return true;
+}
+
+static bool combineRestoreSETHIi(MachineBasicBlock::iterator RestoreMI,
+ MachineBasicBlock::iterator SetHiMI,
+ const TargetInstrInfo *TII)