1 //===- MSP430InstrInfo.cpp - MSP430 Instruction Information ---------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains the MSP430 implementation of the TargetInstrInfo class.
12 //===----------------------------------------------------------------------===//
15 #include "MSP430InstrInfo.h"
16 #include "MSP430TargetMachine.h"
17 #include "MSP430GenInstrInfo.inc"
18 #include "llvm/Function.h"
19 #include "llvm/CodeGen/MachineFunction.h"
20 #include "llvm/CodeGen/MachineInstrBuilder.h"
21 #include "llvm/CodeGen/MachineRegisterInfo.h"
26 MSP430InstrInfo::MSP430InstrInfo(MSP430TargetMachine &tm)
27 : TargetInstrInfoImpl(MSP430Insts, array_lengthof(MSP430Insts)),
28 RI(tm, *this), TM(tm) {}
30 bool MSP430InstrInfo::copyRegToReg(MachineBasicBlock &MBB,
31 MachineBasicBlock::iterator I,
32 unsigned DestReg, unsigned SrcReg,
33 const TargetRegisterClass *DestRC,
34 const TargetRegisterClass *SrcRC) const {
35 DebugLoc DL = DebugLoc::getUnknownLoc();
36 if (I != MBB.end()) DL = I->getDebugLoc();
38 if (DestRC == SrcRC) {
40 if (DestRC == &MSP430::GR16RegClass) {
41 Opc = MSP430::MOV16rr;
42 } else if (DestRC == &MSP430::GR8RegClass) {
48 BuildMI(MBB, I, DL, get(Opc), DestReg).addReg(SrcReg);
56 MSP430InstrInfo::isMoveInstr(const MachineInstr& MI,
57 unsigned &SrcReg, unsigned &DstReg,
58 unsigned &SrcSubIdx, unsigned &DstSubIdx) const {
59 SrcSubIdx = DstSubIdx = 0; // No sub-registers yet.
61 switch (MI.getOpcode()) {
66 assert(MI.getNumOperands() >= 2 &&
67 MI.getOperand(0).isReg() &&
68 MI.getOperand(1).isReg() &&
69 "invalid register-register move instruction");
70 SrcReg = MI.getOperand(1).getReg();
71 DstReg = MI.getOperand(0).getReg();