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248 lines
7.8 KiB
C++
248 lines
7.8 KiB
C++
//====- ARMMachineFuctionInfo.h - ARM machine function info -----*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file declares ARM-specific per-machine-function information.
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//
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//===----------------------------------------------------------------------===//
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#ifndef ARMMACHINEFUNCTIONINFO_H
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#define ARMMACHINEFUNCTIONINFO_H
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#include "ARMSubtarget.h"
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#include "llvm/CodeGen/MachineFunction.h"
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#include "llvm/Target/TargetRegisterInfo.h"
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#include "llvm/Target/TargetMachine.h"
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#include "llvm/ADT/BitVector.h"
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namespace llvm {
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/// ARMFunctionInfo - This class is derived from MachineFunction private
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/// ARM target-specific information for each MachineFunction.
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class ARMFunctionInfo : public MachineFunctionInfo {
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/// isThumb - True if this function is compiled under Thumb mode.
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/// Used to initialized Align, so must precede it.
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bool isThumb;
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/// hasThumb2 - True if the target architecture supports Thumb2. Do not use
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/// to determine if function is compiled under Thumb mode, for that use
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/// 'isThumb'.
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bool hasThumb2;
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/// Align - required alignment. ARM functions and Thumb functions with
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/// constant pools require 4-byte alignment; other Thumb functions
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/// require only 2-byte alignment.
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unsigned Align;
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/// VarArgsRegSaveSize - Size of the register save area for vararg functions.
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///
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unsigned VarArgsRegSaveSize;
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/// HasStackFrame - True if this function has a stack frame. Set by
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/// processFunctionBeforeCalleeSavedScan().
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bool HasStackFrame;
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/// LRSpilledForFarJump - True if the LR register has been for spilled to
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/// enable far jump.
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bool LRSpilledForFarJump;
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/// R3IsLiveIn - True if R3 is live in to this function.
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/// FIXME: Remove when register scavenger for Thumb is done.
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bool R3IsLiveIn;
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/// FramePtrSpillOffset - If HasStackFrame, this records the frame pointer
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/// spill stack offset.
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unsigned FramePtrSpillOffset;
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/// GPRCS1Offset, GPRCS2Offset, DPRCSOffset - Starting offset of callee saved
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/// register spills areas. For Mac OS X:
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///
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/// GPR callee-saved (1) : r4, r5, r6, r7, lr
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/// --------------------------------------------
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/// GPR callee-saved (2) : r8, r10, r11
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/// --------------------------------------------
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/// DPR callee-saved : d8 - d15
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unsigned GPRCS1Offset;
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unsigned GPRCS2Offset;
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unsigned DPRCSOffset;
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/// GPRCS1Size, GPRCS2Size, DPRCSSize - Sizes of callee saved register spills
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/// areas.
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unsigned GPRCS1Size;
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unsigned GPRCS2Size;
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unsigned DPRCSSize;
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/// GPRCS1Frames, GPRCS2Frames, DPRCSFrames - Keeps track of frame indices
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/// which belong to these spill areas.
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BitVector GPRCS1Frames;
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BitVector GPRCS2Frames;
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BitVector DPRCSFrames;
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/// SpilledCSRegs - A BitVector mask of all spilled callee-saved registers.
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///
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BitVector SpilledCSRegs;
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/// JumpTableUId - Unique id for jumptables.
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///
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unsigned JumpTableUId;
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unsigned ConstPoolEntryUId;
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public:
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ARMFunctionInfo() :
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isThumb(false),
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hasThumb2(false),
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Align(2U),
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VarArgsRegSaveSize(0), HasStackFrame(false),
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LRSpilledForFarJump(false), R3IsLiveIn(false),
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FramePtrSpillOffset(0), GPRCS1Offset(0), GPRCS2Offset(0), DPRCSOffset(0),
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GPRCS1Size(0), GPRCS2Size(0), DPRCSSize(0),
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GPRCS1Frames(0), GPRCS2Frames(0), DPRCSFrames(0),
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JumpTableUId(0), ConstPoolEntryUId(0) {}
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explicit ARMFunctionInfo(MachineFunction &MF) :
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isThumb(MF.getTarget().getSubtarget<ARMSubtarget>().isThumb()),
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hasThumb2(MF.getTarget().getSubtarget<ARMSubtarget>().hasThumb2()),
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Align(isThumb ? 1U : 2U),
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VarArgsRegSaveSize(0), HasStackFrame(false),
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LRSpilledForFarJump(false), R3IsLiveIn(false),
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FramePtrSpillOffset(0), GPRCS1Offset(0), GPRCS2Offset(0), DPRCSOffset(0),
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GPRCS1Size(0), GPRCS2Size(0), DPRCSSize(0),
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GPRCS1Frames(32), GPRCS2Frames(32), DPRCSFrames(32),
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SpilledCSRegs(MF.getTarget().getRegisterInfo()->getNumRegs()),
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JumpTableUId(0), ConstPoolEntryUId(0) {}
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bool isThumbFunction() const { return isThumb; }
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bool isThumb1OnlyFunction() const { return isThumb && !hasThumb2; }
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bool isThumb2Function() const { return isThumb && hasThumb2; }
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unsigned getAlign() const { return Align; }
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void setAlign(unsigned a) { Align = a; }
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unsigned getVarArgsRegSaveSize() const { return VarArgsRegSaveSize; }
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void setVarArgsRegSaveSize(unsigned s) { VarArgsRegSaveSize = s; }
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bool hasStackFrame() const { return HasStackFrame; }
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void setHasStackFrame(bool s) { HasStackFrame = s; }
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bool isLRSpilledForFarJump() const { return LRSpilledForFarJump; }
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void setLRIsSpilledForFarJump(bool s) { LRSpilledForFarJump = s; }
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// FIXME: Remove when register scavenger for Thumb is done.
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bool isR3LiveIn() const { return R3IsLiveIn; }
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void setR3IsLiveIn(bool l) { R3IsLiveIn = l; }
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unsigned getFramePtrSpillOffset() const { return FramePtrSpillOffset; }
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void setFramePtrSpillOffset(unsigned o) { FramePtrSpillOffset = o; }
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unsigned getGPRCalleeSavedArea1Offset() const { return GPRCS1Offset; }
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unsigned getGPRCalleeSavedArea2Offset() const { return GPRCS2Offset; }
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unsigned getDPRCalleeSavedAreaOffset() const { return DPRCSOffset; }
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void setGPRCalleeSavedArea1Offset(unsigned o) { GPRCS1Offset = o; }
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void setGPRCalleeSavedArea2Offset(unsigned o) { GPRCS2Offset = o; }
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void setDPRCalleeSavedAreaOffset(unsigned o) { DPRCSOffset = o; }
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unsigned getGPRCalleeSavedArea1Size() const { return GPRCS1Size; }
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unsigned getGPRCalleeSavedArea2Size() const { return GPRCS2Size; }
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unsigned getDPRCalleeSavedAreaSize() const { return DPRCSSize; }
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void setGPRCalleeSavedArea1Size(unsigned s) { GPRCS1Size = s; }
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void setGPRCalleeSavedArea2Size(unsigned s) { GPRCS2Size = s; }
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void setDPRCalleeSavedAreaSize(unsigned s) { DPRCSSize = s; }
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bool isGPRCalleeSavedArea1Frame(int fi) const {
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if (fi < 0 || fi >= (int)GPRCS1Frames.size())
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return false;
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return GPRCS1Frames[fi];
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}
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bool isGPRCalleeSavedArea2Frame(int fi) const {
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if (fi < 0 || fi >= (int)GPRCS2Frames.size())
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return false;
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return GPRCS2Frames[fi];
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}
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bool isDPRCalleeSavedAreaFrame(int fi) const {
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if (fi < 0 || fi >= (int)DPRCSFrames.size())
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return false;
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return DPRCSFrames[fi];
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}
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void addGPRCalleeSavedArea1Frame(int fi) {
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if (fi >= 0) {
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int Size = GPRCS1Frames.size();
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if (fi >= Size) {
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Size *= 2;
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if (fi >= Size)
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Size = fi+1;
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GPRCS1Frames.resize(Size);
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}
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GPRCS1Frames[fi] = true;
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}
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}
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void addGPRCalleeSavedArea2Frame(int fi) {
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if (fi >= 0) {
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int Size = GPRCS2Frames.size();
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if (fi >= Size) {
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Size *= 2;
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if (fi >= Size)
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Size = fi+1;
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GPRCS2Frames.resize(Size);
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}
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GPRCS2Frames[fi] = true;
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}
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}
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void addDPRCalleeSavedAreaFrame(int fi) {
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if (fi >= 0) {
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int Size = DPRCSFrames.size();
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if (fi >= Size) {
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Size *= 2;
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if (fi >= Size)
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Size = fi+1;
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DPRCSFrames.resize(Size);
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}
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DPRCSFrames[fi] = true;
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}
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}
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void setCSRegisterIsSpilled(unsigned Reg) {
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SpilledCSRegs.set(Reg);
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}
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bool isCSRegisterSpilled(unsigned Reg) const {
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return SpilledCSRegs[Reg];
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}
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const BitVector &getSpilledCSRegisters() const {
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return SpilledCSRegs;
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}
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unsigned createJumpTableUId() {
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return JumpTableUId++;
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}
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unsigned getNumJumpTables() const {
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return JumpTableUId;
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}
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void initConstPoolEntryUId(unsigned UId) {
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ConstPoolEntryUId = UId;
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}
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unsigned getNumConstPoolEntries() const {
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return ConstPoolEntryUId;
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}
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unsigned createConstPoolEntryUId() {
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return ConstPoolEntryUId++;
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}
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};
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} // End llvm namespace
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#endif // ARMMACHINEFUNCTIONINFO_H
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