301 lines
11 KiB
C++
301 lines
11 KiB
C++
//===-- ARMMachineFunctionInfo.h - ARM machine function info ----*- C++ -*-===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file declares ARM-specific per-machine-function information.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_LIB_TARGET_ARM_ARMMACHINEFUNCTIONINFO_H
|
|
#define LLVM_LIB_TARGET_ARM_ARMMACHINEFUNCTIONINFO_H
|
|
|
|
#include "llvm/ADT/DenseMap.h"
|
|
#include "llvm/ADT/SmallPtrSet.h"
|
|
#include "llvm/CodeGen/MachineFunction.h"
|
|
#include "llvm/IR/GlobalVariable.h"
|
|
#include "llvm/Support/ErrorHandling.h"
|
|
#include <utility>
|
|
|
|
namespace llvm {
|
|
|
|
/// ARMFunctionInfo - This class is derived from MachineFunctionInfo and
|
|
/// contains private ARM-specific information for each MachineFunction.
|
|
class ARMFunctionInfo : public MachineFunctionInfo {
|
|
virtual void anchor();
|
|
|
|
/// isThumb - True if this function is compiled under Thumb mode.
|
|
/// Used to initialized Align, so must precede it.
|
|
bool isThumb = false;
|
|
|
|
/// hasThumb2 - True if the target architecture supports Thumb2. Do not use
|
|
/// to determine if function is compiled under Thumb mode, for that use
|
|
/// 'isThumb'.
|
|
bool hasThumb2 = false;
|
|
|
|
/// StByValParamsPadding - For parameter that is split between
|
|
/// GPRs and memory; while recovering GPRs part, when
|
|
/// StackAlignment > 4, and GPRs-part-size mod StackAlignment != 0,
|
|
/// we need to insert gap before parameter start address. It allows to
|
|
/// "attach" GPR-part to the part that was passed via stack.
|
|
unsigned StByValParamsPadding = 0;
|
|
|
|
/// ArgsRegSaveSize - Size of the register save area for vararg functions or
|
|
/// those making guaranteed tail calls that need more stack argument space
|
|
/// than is provided by this functions incoming parameters.
|
|
///
|
|
unsigned ArgRegsSaveSize = 0;
|
|
|
|
/// ReturnRegsCount - Number of registers used up in the return.
|
|
unsigned ReturnRegsCount = 0;
|
|
|
|
/// HasStackFrame - True if this function has a stack frame. Set by
|
|
/// determineCalleeSaves().
|
|
bool HasStackFrame = false;
|
|
|
|
/// RestoreSPFromFP - True if epilogue should restore SP from FP. Set by
|
|
/// emitPrologue.
|
|
bool RestoreSPFromFP = false;
|
|
|
|
/// LRSpilled - True if the LR register has been for spilled for
|
|
/// any reason, so it's legal to emit an ARM::tBfar (i.e. "bl").
|
|
bool LRSpilled = false;
|
|
|
|
/// FramePtrSpillOffset - If HasStackFrame, this records the frame pointer
|
|
/// spill stack offset.
|
|
unsigned FramePtrSpillOffset = 0;
|
|
|
|
/// GPRCS1Offset, GPRCS2Offset, DPRCSOffset - Starting offset of callee saved
|
|
/// register spills areas. For Mac OS X:
|
|
///
|
|
/// GPR callee-saved (1) : r4, r5, r6, r7, lr
|
|
/// --------------------------------------------
|
|
/// GPR callee-saved (2) : r8, r10, r11
|
|
/// --------------------------------------------
|
|
/// DPR callee-saved : d8 - d15
|
|
///
|
|
/// Also see AlignedDPRCSRegs below. Not all D-regs need to go in area 3.
|
|
/// Some may be spilled after the stack has been realigned.
|
|
unsigned GPRCS1Offset = 0;
|
|
unsigned GPRCS2Offset = 0;
|
|
unsigned DPRCSOffset = 0;
|
|
|
|
/// GPRCS1Size, GPRCS2Size, DPRCSSize - Sizes of callee saved register spills
|
|
/// areas.
|
|
unsigned FPCXTSaveSize = 0;
|
|
unsigned GPRCS1Size = 0;
|
|
unsigned GPRCS2Size = 0;
|
|
unsigned DPRCSAlignGapSize = 0;
|
|
unsigned DPRCSSize = 0;
|
|
|
|
/// NumAlignedDPRCS2Regs - The number of callee-saved DPRs that are saved in
|
|
/// the aligned portion of the stack frame. This is always a contiguous
|
|
/// sequence of D-registers starting from d8.
|
|
///
|
|
/// We do not keep track of the frame indices used for these registers - they
|
|
/// behave like any other frame index in the aligned stack frame. These
|
|
/// registers also aren't included in DPRCSSize above.
|
|
unsigned NumAlignedDPRCS2Regs = 0;
|
|
|
|
unsigned PICLabelUId = 0;
|
|
|
|
/// VarArgsFrameIndex - FrameIndex for start of varargs area.
|
|
int VarArgsFrameIndex = 0;
|
|
|
|
/// HasITBlocks - True if IT blocks have been inserted.
|
|
bool HasITBlocks = false;
|
|
|
|
// Security Extensions
|
|
bool IsCmseNSEntry;
|
|
bool IsCmseNSCall;
|
|
|
|
/// CPEClones - Track constant pool entries clones created by Constant Island
|
|
/// pass.
|
|
DenseMap<unsigned, unsigned> CPEClones;
|
|
|
|
/// ArgumentStackSize - amount of bytes on stack consumed by the arguments
|
|
/// being passed on the stack
|
|
unsigned ArgumentStackSize = 0;
|
|
|
|
/// ArgumentStackToRestore - amount of bytes on stack consumed that we must
|
|
/// restore on return.
|
|
unsigned ArgumentStackToRestore = 0;
|
|
|
|
/// CoalescedWeights - mapping of basic blocks to the rolling counter of
|
|
/// coalesced weights.
|
|
DenseMap<const MachineBasicBlock*, unsigned> CoalescedWeights;
|
|
|
|
/// True if this function has a subset of CSRs that is handled explicitly via
|
|
/// copies.
|
|
bool IsSplitCSR = false;
|
|
|
|
/// Globals that have had their storage promoted into the constant pool.
|
|
SmallPtrSet<const GlobalVariable*,2> PromotedGlobals;
|
|
|
|
/// The amount the literal pool has been increasedby due to promoted globals.
|
|
int PromotedGlobalsIncrease = 0;
|
|
|
|
/// True if r0 will be preserved by a call to this function (e.g. C++
|
|
/// con/destructors).
|
|
bool PreservesR0 = false;
|
|
|
|
/// True if the function should sign its return address.
|
|
bool SignReturnAddress = false;
|
|
|
|
/// True if the fucntion should sign its return address, even if LR is not
|
|
/// saved.
|
|
bool SignReturnAddressAll = false;
|
|
|
|
/// True if BTI instructions should be placed at potential indirect jump
|
|
/// destinations.
|
|
bool BranchTargetEnforcement = false;
|
|
|
|
public:
|
|
ARMFunctionInfo() = default;
|
|
|
|
explicit ARMFunctionInfo(MachineFunction &MF);
|
|
|
|
bool isThumbFunction() const { return isThumb; }
|
|
bool isThumb1OnlyFunction() const { return isThumb && !hasThumb2; }
|
|
bool isThumb2Function() const { return isThumb && hasThumb2; }
|
|
|
|
bool isCmseNSEntryFunction() const { return IsCmseNSEntry; }
|
|
bool isCmseNSCallFunction() const { return IsCmseNSCall; }
|
|
|
|
unsigned getStoredByValParamsPadding() const { return StByValParamsPadding; }
|
|
void setStoredByValParamsPadding(unsigned p) { StByValParamsPadding = p; }
|
|
|
|
unsigned getArgRegsSaveSize() const { return ArgRegsSaveSize; }
|
|
void setArgRegsSaveSize(unsigned s) { ArgRegsSaveSize = s; }
|
|
|
|
unsigned getReturnRegsCount() const { return ReturnRegsCount; }
|
|
void setReturnRegsCount(unsigned s) { ReturnRegsCount = s; }
|
|
|
|
bool hasStackFrame() const { return HasStackFrame; }
|
|
void setHasStackFrame(bool s) { HasStackFrame = s; }
|
|
|
|
bool shouldRestoreSPFromFP() const { return RestoreSPFromFP; }
|
|
void setShouldRestoreSPFromFP(bool s) { RestoreSPFromFP = s; }
|
|
|
|
bool isLRSpilled() const { return LRSpilled; }
|
|
void setLRIsSpilled(bool s) { LRSpilled = s; }
|
|
|
|
unsigned getFramePtrSpillOffset() const { return FramePtrSpillOffset; }
|
|
void setFramePtrSpillOffset(unsigned o) { FramePtrSpillOffset = o; }
|
|
|
|
unsigned getNumAlignedDPRCS2Regs() const { return NumAlignedDPRCS2Regs; }
|
|
void setNumAlignedDPRCS2Regs(unsigned n) { NumAlignedDPRCS2Regs = n; }
|
|
|
|
unsigned getGPRCalleeSavedArea1Offset() const { return GPRCS1Offset; }
|
|
unsigned getGPRCalleeSavedArea2Offset() const { return GPRCS2Offset; }
|
|
unsigned getDPRCalleeSavedAreaOffset() const { return DPRCSOffset; }
|
|
|
|
void setGPRCalleeSavedArea1Offset(unsigned o) { GPRCS1Offset = o; }
|
|
void setGPRCalleeSavedArea2Offset(unsigned o) { GPRCS2Offset = o; }
|
|
void setDPRCalleeSavedAreaOffset(unsigned o) { DPRCSOffset = o; }
|
|
|
|
unsigned getFPCXTSaveAreaSize() const { return FPCXTSaveSize; }
|
|
unsigned getGPRCalleeSavedArea1Size() const { return GPRCS1Size; }
|
|
unsigned getGPRCalleeSavedArea2Size() const { return GPRCS2Size; }
|
|
unsigned getDPRCalleeSavedGapSize() const { return DPRCSAlignGapSize; }
|
|
unsigned getDPRCalleeSavedAreaSize() const { return DPRCSSize; }
|
|
|
|
void setFPCXTSaveAreaSize(unsigned s) { FPCXTSaveSize = s; }
|
|
void setGPRCalleeSavedArea1Size(unsigned s) { GPRCS1Size = s; }
|
|
void setGPRCalleeSavedArea2Size(unsigned s) { GPRCS2Size = s; }
|
|
void setDPRCalleeSavedGapSize(unsigned s) { DPRCSAlignGapSize = s; }
|
|
void setDPRCalleeSavedAreaSize(unsigned s) { DPRCSSize = s; }
|
|
|
|
unsigned getArgumentStackSize() const { return ArgumentStackSize; }
|
|
void setArgumentStackSize(unsigned size) { ArgumentStackSize = size; }
|
|
|
|
unsigned getArgumentStackToRestore() const { return ArgumentStackToRestore; }
|
|
void setArgumentStackToRestore(unsigned v) { ArgumentStackToRestore = v; }
|
|
|
|
void initPICLabelUId(unsigned UId) {
|
|
PICLabelUId = UId;
|
|
}
|
|
|
|
unsigned getNumPICLabels() const {
|
|
return PICLabelUId;
|
|
}
|
|
|
|
unsigned createPICLabelUId() {
|
|
return PICLabelUId++;
|
|
}
|
|
|
|
int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
|
|
void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; }
|
|
|
|
bool hasITBlocks() const { return HasITBlocks; }
|
|
void setHasITBlocks(bool h) { HasITBlocks = h; }
|
|
|
|
bool isSplitCSR() const { return IsSplitCSR; }
|
|
void setIsSplitCSR(bool s) { IsSplitCSR = s; }
|
|
|
|
void recordCPEClone(unsigned CPIdx, unsigned CPCloneIdx) {
|
|
if (!CPEClones.insert(std::make_pair(CPCloneIdx, CPIdx)).second)
|
|
llvm_unreachable("Duplicate entries!");
|
|
}
|
|
|
|
unsigned getOriginalCPIdx(unsigned CloneIdx) const {
|
|
DenseMap<unsigned, unsigned>::const_iterator I = CPEClones.find(CloneIdx);
|
|
if (I != CPEClones.end())
|
|
return I->second;
|
|
else
|
|
return -1U;
|
|
}
|
|
|
|
DenseMap<const MachineBasicBlock*, unsigned>::iterator getCoalescedWeight(
|
|
MachineBasicBlock* MBB) {
|
|
auto It = CoalescedWeights.find(MBB);
|
|
if (It == CoalescedWeights.end()) {
|
|
It = CoalescedWeights.insert(std::make_pair(MBB, 0)).first;
|
|
}
|
|
return It;
|
|
}
|
|
|
|
/// Indicate to the backend that \c GV has had its storage changed to inside
|
|
/// a constant pool. This means it no longer needs to be emitted as a
|
|
/// global variable.
|
|
void markGlobalAsPromotedToConstantPool(const GlobalVariable *GV) {
|
|
PromotedGlobals.insert(GV);
|
|
}
|
|
SmallPtrSet<const GlobalVariable*, 2>& getGlobalsPromotedToConstantPool() {
|
|
return PromotedGlobals;
|
|
}
|
|
int getPromotedConstpoolIncrease() const {
|
|
return PromotedGlobalsIncrease;
|
|
}
|
|
void setPromotedConstpoolIncrease(int Sz) {
|
|
PromotedGlobalsIncrease = Sz;
|
|
}
|
|
|
|
DenseMap<unsigned, unsigned> EHPrologueRemappedRegs;
|
|
DenseMap<unsigned, unsigned> EHPrologueOffsetInRegs;
|
|
|
|
void setPreservesR0() { PreservesR0 = true; }
|
|
bool getPreservesR0() const { return PreservesR0; }
|
|
|
|
bool shouldSignReturnAddress() const {
|
|
return shouldSignReturnAddress(LRSpilled);
|
|
}
|
|
|
|
bool shouldSignReturnAddress(bool SpillsLR) const {
|
|
if (!SignReturnAddress)
|
|
return false;
|
|
if (SignReturnAddressAll)
|
|
return true;
|
|
return SpillsLR;
|
|
}
|
|
|
|
bool branchTargetEnforcement() const { return BranchTargetEnforcement; }
|
|
};
|
|
|
|
} // end namespace llvm
|
|
|
|
#endif // LLVM_LIB_TARGET_ARM_ARMMACHINEFUNCTIONINFO_H
|