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annotate lib/Target/R600/SIMachineFunctionInfo.cpp @ 33:e4204d083e25 LLVM3.5

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LLVM 3.5
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Thu, 12 Dec 2013 14:32:10 +0900
parents 95c75e76d11b
children 54457678186b
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1 //===-- SIMachineFunctionInfo.cpp - SI Machine Function Info -------===//
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2 //
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3 // The LLVM Compiler Infrastructure
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4 //
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5 // This file is distributed under the University of Illinois Open Source
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6 // License. See LICENSE.TXT for details.
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7 //
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8 /// \file
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9 //===----------------------------------------------------------------------===//
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11
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12 #include "SIMachineFunctionInfo.h"
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13 #include "SIRegisterInfo.h"
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14 #include "llvm/CodeGen/MachineRegisterInfo.h"
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15
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16 #define MAX_LANES 64
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17
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18 using namespace llvm;
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21 // Pin the vtable to this file.
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22 void SIMachineFunctionInfo::anchor() {}
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23
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24 SIMachineFunctionInfo::SIMachineFunctionInfo(const MachineFunction &MF)
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25 : AMDGPUMachineFunction(MF),
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26 PSInputAddr(0),
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27 SpillTracker() { }
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29 static unsigned createLaneVGPR(MachineRegisterInfo &MRI) {
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30 return MRI.createVirtualRegister(&AMDGPU::VReg_32RegClass);
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31 }
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33 unsigned SIMachineFunctionInfo::RegSpillTracker::getNextLane(MachineRegisterInfo &MRI) {
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34 if (!LaneVGPR) {
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35 LaneVGPR = createLaneVGPR(MRI);
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36 } else {
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37 CurrentLane++;
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38 if (CurrentLane == MAX_LANES) {
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39 CurrentLane = 0;
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40 LaneVGPR = createLaneVGPR(MRI);
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41 }
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42 }
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43 return CurrentLane;
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44 }
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46 void SIMachineFunctionInfo::RegSpillTracker::addSpilledReg(unsigned FrameIndex,
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47 unsigned Reg,
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48 int Lane) {
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49 SpilledRegisters[FrameIndex] = SpilledReg(Reg, Lane);
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50 }
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51
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52 const SIMachineFunctionInfo::SpilledReg&
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53 SIMachineFunctionInfo::RegSpillTracker::getSpilledReg(unsigned FrameIndex) {
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54 return SpilledRegisters[FrameIndex];
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55 }