1 //===- PTXRegisterInfo.cpp - PTX Register 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 contains the PTX implementation of the TargetRegisterInfo class. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "PTX.h" 15 #include "PTXRegisterInfo.h" 16 #include "llvm/CodeGen/MachineFunction.h" 17 #include "llvm/CodeGen/MachineInstrBuilder.h" 18 #include "llvm/CodeGen/MachineRegisterInfo.h" 19 #include "llvm/Target/TargetInstrInfo.h" 20 #include "llvm/Support/Debug.h" 21 #include "llvm/Support/raw_ostream.h" 22 23 #define GET_REGINFO_TARGET_DESC 24 #include "PTXGenRegisterInfo.inc" 25 26 using namespace llvm; 27 28 PTXRegisterInfo::PTXRegisterInfo(PTXTargetMachine &TM, 29 const TargetInstrInfo &tii) 30 // PTX does not have a return address register. 31 : PTXGenRegisterInfo(0), TII(tii) { 32 } 33 34 void PTXRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II, 35 int SPAdj, 36 RegScavenger *RS) const { 37 unsigned Index; 38 MachineInstr &MI = *II; 39 //MachineBasicBlock &MBB = *MI.getParent(); 40 //DebugLoc dl = MI.getDebugLoc(); 41 //MachineRegisterInfo &MRI = MI.getParent()->getParent()->getRegInfo(); 42 43 //unsigned Reg = MRI.createVirtualRegister(PTX::RegF32RegisterClass); 44 45 llvm_unreachable("FrameIndex should have been previously eliminated!"); 46 47 Index = 0; 48 while (!MI.getOperand(Index).isFI()) { 49 ++Index; 50 assert(Index < MI.getNumOperands() && 51 "Instr does not have a FrameIndex operand!"); 52 } 53 54 int FrameIndex = MI.getOperand(Index).getIndex(); 55 56 DEBUG(dbgs() << "eliminateFrameIndex: " << MI); 57 DEBUG(dbgs() << "- SPAdj: " << SPAdj << "\n"); 58 DEBUG(dbgs() << "- FrameIndex: " << FrameIndex << "\n"); 59 60 //MachineInstr* MI2 = BuildMI(MBB, II, dl, TII.get(PTX::LOAD_LOCAL_F32)) 61 //.addReg(Reg, RegState::Define).addImm(FrameIndex); 62 //if (MI2->findFirstPredOperandIdx() == -1) { 63 // MI2->addOperand(MachineOperand::CreateReg(PTX::NoRegister, /*IsDef=*/false)); 64 // MI2->addOperand(MachineOperand::CreateImm(PTX::PRED_NORMAL)); 65 //} 66 //MI2->dump(); 67 68 //MachineOperand ESOp = MachineOperand::CreateES("__local__"); 69 70 // This frame index is post stack slot re-use assignments 71 //MI.getOperand(Index).ChangeToRegister(Reg, false); 72 MI.getOperand(Index).ChangeToImmediate(FrameIndex); 73 //MI.getOperand(Index) = ESOp; 74 } 75
