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spilled (if it is not already). - If LR is spilled, use BL to implement far jumps. LR is not used as a GPR in thumb mode so it can be clobbered if it is properly spilled / restored in prologue / epilogue. - If LR is force spilled but no far jump has been emitted, try undo'ing the spill by: push lr -> delete pop pc -> bx lr git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33650 91177308-0d34-0410-b5e6-96231b3b80d8
163 lines
5.4 KiB
C++
163 lines
5.4 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 was developed by the Evan Cheng and is distributed under
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// the University of Illinois Open Source 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/TargetMachine.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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///
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bool isThumb;
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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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/// LRSForceSpilled - True if the LR register has been for spilled to enable
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/// far jump.
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bool LRForceSpilled;
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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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std::vector<bool> GPRCS1Frames;
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std::vector<bool> GPRCS2Frames;
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std::vector<bool> DPRCSFrames;
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/// JumpTableUId - Unique id for jumptables.
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///
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unsigned JumpTableUId;
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public:
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ARMFunctionInfo() :
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isThumb(false),
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VarArgsRegSaveSize(0), HasStackFrame(false), LRForceSpilled(false),
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FramePtrSpillOffset(0), GPRCS1Offset(0), GPRCS2Offset(0), DPRCSOffset(0),
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GPRCS1Size(0), GPRCS2Size(0), DPRCSSize(0), JumpTableUId(0) {}
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ARMFunctionInfo(MachineFunction &MF) :
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isThumb(MF.getTarget().getSubtarget<ARMSubtarget>().isThumb()),
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VarArgsRegSaveSize(0), HasStackFrame(false), LRForceSpilled(false),
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FramePtrSpillOffset(0), GPRCS1Offset(0), GPRCS2Offset(0), DPRCSOffset(0),
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GPRCS1Size(0), GPRCS2Size(0), DPRCSSize(0), JumpTableUId(0) {}
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bool isThumbFunction() const { return isThumb; }
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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 isLRForceSpilled() const { return LRForceSpilled; }
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void setLRIsForceSpilled(bool s) { LRForceSpilled = 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 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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if (fi >= (int)GPRCS1Frames.size())
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GPRCS1Frames.resize(fi+1);
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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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if (fi >= (int)GPRCS2Frames.size())
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GPRCS2Frames.resize(fi+1);
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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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if (fi >= (int)DPRCSFrames.size())
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DPRCSFrames.resize(fi+1);
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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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};
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} // End llvm namespace
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#endif // ARMMACHINEFUNCTIONINFO_H
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