+ const BasicBlock *BB = MBB->getBasicBlock();
+ MachineFunction::iterator FallThroughMBB = ++MachineFunction::iterator(MBB);
+ MachineBasicBlock *LongBrMBB = MF->CreateMachineBasicBlock(BB);
+
+ const MipsInstrInfo *TII =
+ static_cast<const MipsInstrInfo*>(TM.getInstrInfo());
+
+ MF->insert(FallThroughMBB, LongBrMBB);
+ MBB->removeSuccessor(TgtMBB);
+ MBB->addSuccessor(LongBrMBB);
+
+ if (IsPIC) {
+ MachineBasicBlock *BalTgtMBB = MF->CreateMachineBasicBlock(BB);
+ MF->insert(FallThroughMBB, BalTgtMBB);
+ LongBrMBB->addSuccessor(BalTgtMBB);
+ BalTgtMBB->addSuccessor(TgtMBB);
+
+ int64_t TgtAddress = MBBInfos[TgtMBB->getNumber()].Address;
+ unsigned BalTgtMBBSize = 5;
+ int64_t Offset = TgtAddress - (I.Address + I.Size - BalTgtMBBSize * 4);
+ int64_t Lo = SignExtend64<16>(Offset & 0xffff);
+ int64_t Hi = SignExtend64<16>(((Offset + 0x8000) >> 16) & 0xffff);
+
+ if (ABI != MipsSubtarget::N64) {
+ // $longbr:
+ // addiu $sp, $sp, -8
+ // sw $ra, 0($sp)
+ // bal $baltgt
+ // lui $at, %hi($tgt - $baltgt)
+ // $baltgt:
+ // addiu $at, $at, %lo($tgt - $baltgt)
+ // addu $at, $ra, $at
+ // lw $ra, 0($sp)
+ // jr $at
+ // addiu $sp, $sp, 8
+ // $fallthrough:
+ //
+
+ Pos = LongBrMBB->begin();
+
+ BuildMI(*LongBrMBB, Pos, DL, TII->get(Mips::ADDiu), Mips::SP)
+ .addReg(Mips::SP).addImm(-8);
+ BuildMI(*LongBrMBB, Pos, DL, TII->get(Mips::SW)).addReg(Mips::RA)
+ .addReg(Mips::SP).addImm(0);
+
+ MIBundleBuilder(*LongBrMBB, Pos)
+ .append(BuildMI(*MF, DL, TII->get(Mips::BAL_BR)).addMBB(BalTgtMBB))
+ .append(BuildMI(*MF, DL, TII->get(Mips::LUi), Mips::AT).addImm(Hi));
+
+ Pos = BalTgtMBB->begin();
+
+ BuildMI(*BalTgtMBB, Pos, DL, TII->get(Mips::ADDiu), Mips::AT)
+ .addReg(Mips::AT).addImm(Lo);
+ BuildMI(*BalTgtMBB, Pos, DL, TII->get(Mips::ADDu), Mips::AT)
+ .addReg(Mips::RA).addReg(Mips::AT);
+ BuildMI(*BalTgtMBB, Pos, DL, TII->get(Mips::LW), Mips::RA)
+ .addReg(Mips::SP).addImm(0);
+
+ MIBundleBuilder(*BalTgtMBB, Pos)
+ .append(BuildMI(*MF, DL, TII->get(Mips::JR)).addReg(Mips::AT))
+ .append(BuildMI(*MF, DL, TII->get(Mips::ADDiu), Mips::SP)
+ .addReg(Mips::SP).addImm(8));
+ } else {
+ // $longbr:
+ // daddiu $sp, $sp, -16
+ // sd $ra, 0($sp)
+ // lui64 $at, %highest($tgt - $baltgt)
+ // daddiu $at, $at, %higher($tgt - $baltgt)
+ // dsll $at, $at, 16
+ // daddiu $at, $at, %hi($tgt - $baltgt)
+ // bal $baltgt
+ // dsll $at, $at, 16
+ // $baltgt:
+ // daddiu $at, $at, %lo($tgt - $baltgt)
+ // daddu $at, $ra, $at
+ // ld $ra, 0($sp)
+ // jr64 $at
+ // daddiu $sp, $sp, 16
+ // $fallthrough:
+ //
+
+ int64_t Higher = SignExtend64<16>(((Offset + 0x80008000) >> 32) & 0xffff);
+ int64_t Highest =
+ SignExtend64<16>(((Offset + 0x800080008000LL) >> 48) & 0xffff);
+
+ Pos = LongBrMBB->begin();
+
+ BuildMI(*LongBrMBB, Pos, DL, TII->get(Mips::DADDiu), Mips::SP_64)
+ .addReg(Mips::SP_64).addImm(-16);
+ BuildMI(*LongBrMBB, Pos, DL, TII->get(Mips::SD)).addReg(Mips::RA_64)
+ .addReg(Mips::SP_64).addImm(0);
+ BuildMI(*LongBrMBB, Pos, DL, TII->get(Mips::LUi64), Mips::AT_64)
+ .addImm(Highest);
+ BuildMI(*LongBrMBB, Pos, DL, TII->get(Mips::DADDiu), Mips::AT_64)
+ .addReg(Mips::AT_64).addImm(Higher);
+ BuildMI(*LongBrMBB, Pos, DL, TII->get(Mips::DSLL), Mips::AT_64)
+ .addReg(Mips::AT_64).addImm(16);
+ BuildMI(*LongBrMBB, Pos, DL, TII->get(Mips::DADDiu), Mips::AT_64)
+ .addReg(Mips::AT_64).addImm(Hi);
+
+ MIBundleBuilder(*LongBrMBB, Pos)
+ .append(BuildMI(*MF, DL, TII->get(Mips::BAL_BR)).addMBB(BalTgtMBB))
+ .append(BuildMI(*MF, DL, TII->get(Mips::DSLL), Mips::AT_64)
+ .addReg(Mips::AT_64).addImm(16));
+
+ Pos = BalTgtMBB->begin();
+
+ BuildMI(*BalTgtMBB, Pos, DL, TII->get(Mips::DADDiu), Mips::AT_64)
+ .addReg(Mips::AT_64).addImm(Lo);
+ BuildMI(*BalTgtMBB, Pos, DL, TII->get(Mips::DADDu), Mips::AT_64)
+ .addReg(Mips::RA_64).addReg(Mips::AT_64);
+ BuildMI(*BalTgtMBB, Pos, DL, TII->get(Mips::LD), Mips::RA_64)
+ .addReg(Mips::SP_64).addImm(0);
+
+ MIBundleBuilder(*BalTgtMBB, Pos)
+ .append(BuildMI(*MF, DL, TII->get(Mips::JR64)).addReg(Mips::AT_64))
+ .append(BuildMI(*MF, DL, TII->get(Mips::DADDiu), Mips::SP_64)
+ .addReg(Mips::SP_64).addImm(16));
+ }