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f06f6f50e9
ARM targets with NEON units have access to aligned vector loads and stores that are potentially faster than unaligned operations. Add support for spilling the callee-saved NEON registers to an aligned stack area using 16-byte aligned NEON loads and store. This feature is off by default, controlled by an -align-neon-spills command line option. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147211 91177308-0d34-0410-b5e6-96231b3b80d8
268 lines
8.7 KiB
C++
268 lines
8.7 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 MachineFunctionInfo and
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/// contains private ARM-specific information for each MachineFunction.
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class ARMFunctionInfo : public MachineFunctionInfo {
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virtual void anchor();
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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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/// 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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/// RestoreSPFromFP - True if epilogue should restore SP from FP. Set by
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/// emitPrologue.
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bool RestoreSPFromFP;
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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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/// 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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///
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/// Also see AlignedDPRCSRegs below. Not all D-regs need to go in area 3.
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/// Some may be spilled after the stack has been realigned.
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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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/// NumAlignedDPRCS2Regs - The number of callee-saved DPRs that are saved in
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/// the aligned portion of the stack frame. This is always a contiguous
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/// sequence of D-registers starting from d8.
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///
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/// We do not keep track of the frame indices used for these registers - they
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/// behave like any other frame index in the aligned stack frame. These
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/// registers also aren't included in DPRCSSize above.
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unsigned NumAlignedDPRCS2Regs;
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/// JumpTableUId - Unique id for jumptables.
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///
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unsigned JumpTableUId;
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unsigned PICLabelUId;
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/// VarArgsFrameIndex - FrameIndex for start of varargs area.
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int VarArgsFrameIndex;
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/// HasITBlocks - True if IT blocks have been inserted.
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bool HasITBlocks;
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/// CPEClones - Track constant pool entries clones created by Constant Island
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/// pass.
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DenseMap<unsigned, unsigned> CPEClones;
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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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VarArgsRegSaveSize(0), HasStackFrame(false), RestoreSPFromFP(false),
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LRSpilledForFarJump(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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NumAlignedDPRCS2Regs(0),
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JumpTableUId(0), PICLabelUId(0),
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VarArgsFrameIndex(0), HasITBlocks(false) {}
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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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VarArgsRegSaveSize(0), HasStackFrame(false), RestoreSPFromFP(false),
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LRSpilledForFarJump(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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JumpTableUId(0), PICLabelUId(0),
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VarArgsFrameIndex(0), HasITBlocks(false) {}
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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 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 shouldRestoreSPFromFP() const { return RestoreSPFromFP; }
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void setShouldRestoreSPFromFP(bool s) { RestoreSPFromFP = s; }
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bool isLRSpilledForFarJump() const { return LRSpilledForFarJump; }
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void setLRIsSpilledForFarJump(bool s) { LRSpilledForFarJump = s; }
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unsigned getFramePtrSpillOffset() const { return FramePtrSpillOffset; }
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void setFramePtrSpillOffset(unsigned o) { FramePtrSpillOffset = o; }
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unsigned getNumAlignedDPRCS2Regs() const { return NumAlignedDPRCS2Regs; }
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void setNumAlignedDPRCS2Regs(unsigned n) { NumAlignedDPRCS2Regs = n; }
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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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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 initPICLabelUId(unsigned UId) {
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PICLabelUId = UId;
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}
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unsigned getNumPICLabels() const {
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return PICLabelUId;
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}
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unsigned createPICLabelUId() {
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return PICLabelUId++;
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}
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int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
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void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; }
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bool hasITBlocks() const { return HasITBlocks; }
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void setHasITBlocks(bool h) { HasITBlocks = h; }
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void recordCPEClone(unsigned CPIdx, unsigned CPCloneIdx) {
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if (!CPEClones.insert(std::make_pair(CPCloneIdx, CPIdx)).second)
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assert(0 && "Duplicate entries!");
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}
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unsigned getOriginalCPIdx(unsigned CloneIdx) const {
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DenseMap<unsigned, unsigned>::const_iterator I = CPEClones.find(CloneIdx);
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if (I != CPEClones.end())
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return I->second;
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else
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return -1U;
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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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