forked from OSchip/llvm-project
247 lines
8.9 KiB
C++
247 lines
8.9 KiB
C++
//===-- ARMMachineFunctionInfo.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 LLVM_LIB_TARGET_ARM_ARMMACHINEFUNCTIONINFO_H
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#define LLVM_LIB_TARGET_ARM_ARMMACHINEFUNCTIONINFO_H
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/ADT/SmallPtrSet.h"
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#include "llvm/CodeGen/MachineFunction.h"
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#include "llvm/Support/ErrorHandling.h"
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#include <utility>
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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 = false;
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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 = false;
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/// StByValParamsPadding - For parameter that is split between
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/// GPRs and memory; while recovering GPRs part, when
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/// StackAlignment > 4, and GPRs-part-size mod StackAlignment != 0,
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/// we need to insert gap before parameter start address. It allows to
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/// "attach" GPR-part to the part that was passed via stack.
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unsigned StByValParamsPadding = 0;
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/// VarArgsRegSaveSize - Size of the register save area for vararg functions.
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///
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unsigned ArgRegsSaveSize = 0;
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/// ReturnRegsCount - Number of registers used up in the return.
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unsigned ReturnRegsCount = 0;
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/// HasStackFrame - True if this function has a stack frame. Set by
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/// determineCalleeSaves().
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bool HasStackFrame = false;
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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 = false;
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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 = false;
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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 = 0;
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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 = 0;
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unsigned GPRCS2Offset = 0;
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unsigned DPRCSOffset = 0;
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/// GPRCS1Size, GPRCS2Size, DPRCSSize - Sizes of callee saved register spills
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/// areas.
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unsigned GPRCS1Size = 0;
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unsigned GPRCS2Size = 0;
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unsigned DPRCSAlignGapSize = 0;
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unsigned DPRCSSize = 0;
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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 = 0;
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unsigned PICLabelUId = 0;
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/// VarArgsFrameIndex - FrameIndex for start of varargs area.
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int VarArgsFrameIndex = 0;
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/// HasITBlocks - True if IT blocks have been inserted.
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bool HasITBlocks = false;
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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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/// ArgumentStackSize - amount of bytes on stack consumed by the arguments
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/// being passed on the stack
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unsigned ArgumentStackSize = 0;
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/// CoalescedWeights - mapping of basic blocks to the rolling counter of
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/// coalesced weights.
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DenseMap<const MachineBasicBlock*, unsigned> CoalescedWeights;
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/// True if this function has a subset of CSRs that is handled explicitly via
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/// copies.
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bool IsSplitCSR = false;
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/// Globals that have had their storage promoted into the constant pool.
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SmallPtrSet<const GlobalVariable*,2> PromotedGlobals;
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/// The amount the literal pool has been increasedby due to promoted globals.
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int PromotedGlobalsIncrease = 0;
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public:
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ARMFunctionInfo() = default;
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explicit ARMFunctionInfo(MachineFunction &MF);
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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 getStoredByValParamsPadding() const { return StByValParamsPadding; }
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void setStoredByValParamsPadding(unsigned p) { StByValParamsPadding = p; }
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unsigned getArgRegsSaveSize() const { return ArgRegsSaveSize; }
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void setArgRegsSaveSize(unsigned s) { ArgRegsSaveSize = s; }
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unsigned getReturnRegsCount() const { return ReturnRegsCount; }
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void setReturnRegsCount(unsigned s) { ReturnRegsCount = 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 getDPRCalleeSavedGapSize() const { return DPRCSAlignGapSize; }
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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 setDPRCalleeSavedGapSize(unsigned s) { DPRCSAlignGapSize = s; }
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void setDPRCalleeSavedAreaSize(unsigned s) { DPRCSSize = s; }
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unsigned getArgumentStackSize() const { return ArgumentStackSize; }
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void setArgumentStackSize(unsigned size) { ArgumentStackSize = size; }
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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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bool isSplitCSR() const { return IsSplitCSR; }
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void setIsSplitCSR(bool s) { IsSplitCSR = s; }
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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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llvm_unreachable("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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DenseMap<const MachineBasicBlock*, unsigned>::iterator getCoalescedWeight(
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MachineBasicBlock* MBB) {
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auto It = CoalescedWeights.find(MBB);
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if (It == CoalescedWeights.end()) {
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It = CoalescedWeights.insert(std::make_pair(MBB, 0)).first;
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}
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return It;
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}
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/// Indicate to the backend that \c GV has had its storage changed to inside
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/// a constant pool. This means it no longer needs to be emitted as a
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/// global variable.
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void markGlobalAsPromotedToConstantPool(const GlobalVariable *GV) {
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PromotedGlobals.insert(GV);
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}
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SmallPtrSet<const GlobalVariable*, 2>& getGlobalsPromotedToConstantPool() {
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return PromotedGlobals;
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}
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int getPromotedConstpoolIncrease() const {
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return PromotedGlobalsIncrease;
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}
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void setPromotedConstpoolIncrease(int Sz) {
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PromotedGlobalsIncrease = Sz;
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}
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};
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} // end namespace llvm
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#endif // LLVM_LIB_TARGET_ARM_ARMMACHINEFUNCTIONINFO_H
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