- F->getBasicBlockList().insert(It, copy0MBB);
- F->getBasicBlockList().insert(It, sinkMBB);
- // Update machine-CFG edges by first adding all successors of the current
- // block to the new block which will contain the Phi node for the select.
- for(MachineBasicBlock::succ_iterator i = BB->succ_begin(),
- e = BB->succ_end(); i != e; ++i)
- sinkMBB->addSuccessor(*i);
- // Next, remove all successors of the current block, and add the true
- // and fallthrough blocks as its successors.
- while(!BB->succ_empty())
- BB->removeSuccessor(BB->succ_begin());
- BB->addSuccessor(copy0MBB);
- BB->addSuccessor(sinkMBB);
-
- // copy0MBB:
- // %FalseValue = ...
- // # fallthrough to sinkMBB
- BB = copy0MBB;
-
- // Update machine-CFG edges
- BB->addSuccessor(sinkMBB);
-
- // sinkMBB:
- // %Result = phi [ %FalseValue, copy0MBB ], [ %TrueValue, thisMBB ]
- // ...
- BB = sinkMBB;
- BuildMI(BB, TII->get(PPC::PHI), MI->getOperand(0).getReg())
- .addReg(MI->getOperand(3).getReg()).addMBB(copy0MBB)
- .addReg(MI->getOperand(2).getReg()).addMBB(thisMBB);
-
- delete MI; // The pseudo instruction is gone now.
+
+ if (MI->getOpcode() == PPC::SELECT_CC_I4 ||
+ MI->getOpcode() == PPC::SELECT_CC_I8 ||
+ MI->getOpcode() == PPC::SELECT_CC_F4 ||
+ MI->getOpcode() == PPC::SELECT_CC_F8 ||
+ MI->getOpcode() == PPC::SELECT_CC_VRRC) {
+
+ // The incoming instruction knows the destination vreg to set, the
+ // condition code register to branch on, the true/false values to
+ // select between, and a branch opcode to use.
+
+ // thisMBB:
+ // ...
+ // TrueVal = ...
+ // cmpTY ccX, r1, r2
+ // bCC copy1MBB
+ // fallthrough --> copy0MBB
+ MachineBasicBlock *thisMBB = BB;
+ MachineBasicBlock *copy0MBB = F->CreateMachineBasicBlock(LLVM_BB);
+ MachineBasicBlock *sinkMBB = F->CreateMachineBasicBlock(LLVM_BB);
+ unsigned SelectPred = MI->getOperand(4).getImm();
+ BuildMI(BB, TII->get(PPC::BCC))
+ .addImm(SelectPred).addReg(MI->getOperand(1).getReg()).addMBB(sinkMBB);
+ F->insert(It, copy0MBB);
+ F->insert(It, sinkMBB);
+ // Update machine-CFG edges by transferring all successors of the current
+ // block to the new block which will contain the Phi node for the select.
+ sinkMBB->transferSuccessors(BB);
+ // Next, add the true and fallthrough blocks as its successors.
+ BB->addSuccessor(copy0MBB);
+ BB->addSuccessor(sinkMBB);
+
+ // copy0MBB:
+ // %FalseValue = ...
+ // # fallthrough to sinkMBB
+ BB = copy0MBB;
+
+ // Update machine-CFG edges
+ BB->addSuccessor(sinkMBB);
+
+ // sinkMBB:
+ // %Result = phi [ %FalseValue, copy0MBB ], [ %TrueValue, thisMBB ]
+ // ...
+ BB = sinkMBB;
+ BuildMI(BB, TII->get(PPC::PHI), MI->getOperand(0).getReg())
+ .addReg(MI->getOperand(3).getReg()).addMBB(copy0MBB)
+ .addReg(MI->getOperand(2).getReg()).addMBB(thisMBB);
+ }
+ else if (MI->getOpcode() == PPC::ATOMIC_LOAD_ADD_I32 ||
+ MI->getOpcode() == PPC::ATOMIC_LOAD_ADD_I64) {
+ bool is64bit = MI->getOpcode() == PPC::ATOMIC_LOAD_ADD_I64;
+
+ unsigned dest = MI->getOperand(0).getReg();
+ unsigned ptrA = MI->getOperand(1).getReg();
+ unsigned ptrB = MI->getOperand(2).getReg();
+ unsigned incr = MI->getOperand(3).getReg();
+
+ MachineBasicBlock *loopMBB = F->CreateMachineBasicBlock(LLVM_BB);
+ MachineBasicBlock *exitMBB = F->CreateMachineBasicBlock(LLVM_BB);
+ F->insert(It, loopMBB);
+ F->insert(It, exitMBB);
+ exitMBB->transferSuccessors(BB);
+
+ MachineRegisterInfo &RegInfo = F->getRegInfo();
+ unsigned TmpReg = RegInfo.createVirtualRegister(
+ is64bit ? (const TargetRegisterClass *) &PPC::GPRCRegClass :
+ (const TargetRegisterClass *) &PPC::G8RCRegClass);
+
+ // thisMBB:
+ // ...
+ // fallthrough --> loopMBB
+ BB->addSuccessor(loopMBB);
+
+ // loopMBB:
+ // l[wd]arx dest, ptr
+ // add r0, dest, incr
+ // st[wd]cx. r0, ptr
+ // bne- loopMBB
+ // fallthrough --> exitMBB
+ BB = loopMBB;
+ BuildMI(BB, TII->get(is64bit ? PPC::LDARX : PPC::LWARX), dest)
+ .addReg(ptrA).addReg(ptrB);
+ BuildMI(BB, TII->get(is64bit ? PPC::ADD4 : PPC::ADD8), TmpReg)
+ .addReg(incr).addReg(dest);
+ BuildMI(BB, TII->get(is64bit ? PPC::STDCX : PPC::STWCX))
+ .addReg(TmpReg).addReg(ptrA).addReg(ptrB);
+ BuildMI(BB, TII->get(PPC::BCC))
+ .addImm(PPC::PRED_NE).addReg(PPC::CR0).addMBB(loopMBB);
+ BB->addSuccessor(loopMBB);
+ BB->addSuccessor(exitMBB);
+
+ // exitMBB:
+ // ...
+ BB = exitMBB;
+ }
+ else if (MI->getOpcode() == PPC::ATOMIC_CMP_SWAP_I32 ||
+ MI->getOpcode() == PPC::ATOMIC_CMP_SWAP_I64) {
+ bool is64bit = MI->getOpcode() == PPC::ATOMIC_CMP_SWAP_I64;
+
+ unsigned dest = MI->getOperand(0).getReg();
+ unsigned ptrA = MI->getOperand(1).getReg();
+ unsigned ptrB = MI->getOperand(2).getReg();
+ unsigned oldval = MI->getOperand(3).getReg();
+ unsigned newval = MI->getOperand(4).getReg();
+
+ MachineBasicBlock *loopMBB = F->CreateMachineBasicBlock(LLVM_BB);
+ MachineBasicBlock *exitMBB = F->CreateMachineBasicBlock(LLVM_BB);
+ F->insert(It, loopMBB);
+ F->insert(It, exitMBB);
+ exitMBB->transferSuccessors(BB);
+
+ // thisMBB:
+ // ...
+ // fallthrough --> loopMBB
+ BB->addSuccessor(loopMBB);
+
+ // loopMBB:
+ // l[wd]arx dest, ptr
+ // cmp[wd] dest, oldval
+ // bne- exitMBB
+ // st[wd]cx. newval, ptr
+ // bne- loopMBB
+ // fallthrough --> exitMBB
+ BB = loopMBB;
+ BuildMI(BB, TII->get(is64bit ? PPC::LDARX : PPC::LWARX), dest)
+ .addReg(ptrA).addReg(ptrB);
+ BuildMI(BB, TII->get(is64bit ? PPC::CMPD : PPC::CMPW), PPC::CR0)
+ .addReg(oldval).addReg(dest);
+ BuildMI(BB, TII->get(PPC::BCC))
+ .addImm(PPC::PRED_NE).addReg(PPC::CR0).addMBB(exitMBB);
+ BuildMI(BB, TII->get(is64bit ? PPC::STDCX : PPC::STWCX))
+ .addReg(newval).addReg(ptrA).addReg(ptrB);
+ BuildMI(BB, TII->get(PPC::BCC))
+ .addImm(PPC::PRED_NE).addReg(PPC::CR0).addMBB(loopMBB);
+ BB->addSuccessor(loopMBB);
+ BB->addSuccessor(exitMBB);
+
+ // exitMBB:
+ // ...
+ BB = exitMBB;
+ }
+ else if (MI->getOpcode() == PPC::ATOMIC_SWAP_I32 ||
+ MI->getOpcode() == PPC::ATOMIC_SWAP_I64) {
+ bool is64bit = MI->getOpcode() == PPC::ATOMIC_SWAP_I64;
+
+ unsigned dest = MI->getOperand(0).getReg();
+ unsigned ptrA = MI->getOperand(1).getReg();
+ unsigned ptrB = MI->getOperand(2).getReg();
+ unsigned newval = MI->getOperand(3).getReg();
+
+ MachineBasicBlock *loopMBB = F->CreateMachineBasicBlock(LLVM_BB);
+ MachineBasicBlock *exitMBB = F->CreateMachineBasicBlock(LLVM_BB);
+ F->insert(It, loopMBB);
+ F->insert(It, exitMBB);
+ exitMBB->transferSuccessors(BB);
+
+ // thisMBB:
+ // ...
+ // fallthrough --> loopMBB
+ BB->addSuccessor(loopMBB);
+
+ // loopMBB:
+ // l[wd]arx dest, ptr
+ // st[wd]cx. newval, ptr
+ // bne- loopMBB
+ // fallthrough --> exitMBB
+ BB = loopMBB;
+ BuildMI(BB, TII->get(is64bit ? PPC::LDARX : PPC::LWARX), dest)
+ .addReg(ptrA).addReg(ptrB);
+ BuildMI(BB, TII->get(is64bit ? PPC::STDCX : PPC::STWCX))
+ .addReg(newval).addReg(ptrA).addReg(ptrB);
+ BuildMI(BB, TII->get(PPC::BCC))
+ .addImm(PPC::PRED_NE).addReg(PPC::CR0).addMBB(loopMBB);
+ BB->addSuccessor(loopMBB);
+ BB->addSuccessor(exitMBB);
+
+ // exitMBB:
+ // ...
+ BB = exitMBB;
+ }
+ else {
+ assert(0 && "Unexpected instr type to insert");
+ }
+
+ F->DeleteMachineInstr(MI); // The pseudo instruction is gone now.