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Apparently, the style needs to be agreed upon first. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240390 91177308-0d34-0410-b5e6-96231b3b80d8
164 lines
5.9 KiB
C++
164 lines
5.9 KiB
C++
//=- AArch64MachineFuctionInfo.h - AArch64 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 AArch64-specific per-machine-function information.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_AARCH64_AARCH64MACHINEFUNCTIONINFO_H
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#define LLVM_LIB_TARGET_AARCH64_AARCH64MACHINEFUNCTIONINFO_H
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#include "llvm/ADT/SmallPtrSet.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/CodeGen/MachineFunction.h"
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#include "llvm/MC/MCLinkerOptimizationHint.h"
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namespace llvm {
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/// AArch64FunctionInfo - This class is derived from MachineFunctionInfo and
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/// contains private AArch64-specific information for each MachineFunction.
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class AArch64FunctionInfo : public MachineFunctionInfo {
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/// Number of bytes of arguments this function has on the stack. If the callee
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/// is expected to restore the argument stack this should be a multiple of 16,
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/// all usable during a tail call.
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///
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/// The alternative would forbid tail call optimisation in some cases: if we
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/// want to transfer control from a function with 8-bytes of stack-argument
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/// space to a function with 16-bytes then misalignment of this value would
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/// make a stack adjustment necessary, which could not be undone by the
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/// callee.
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unsigned BytesInStackArgArea;
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/// The number of bytes to restore to deallocate space for incoming
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/// arguments. Canonically 0 in the C calling convention, but non-zero when
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/// callee is expected to pop the args.
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unsigned ArgumentStackToRestore;
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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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/// \brief Amount of stack frame size, not including callee-saved registers.
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unsigned LocalStackSize;
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/// \brief Number of TLS accesses using the special (combinable)
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/// _TLS_MODULE_BASE_ symbol.
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unsigned NumLocalDynamicTLSAccesses;
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/// \brief FrameIndex for start of varargs area for arguments passed on the
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/// stack.
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int VarArgsStackIndex;
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/// \brief FrameIndex for start of varargs area for arguments passed in
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/// general purpose registers.
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int VarArgsGPRIndex;
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/// \brief Size of the varargs area for arguments passed in general purpose
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/// registers.
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unsigned VarArgsGPRSize;
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/// \brief FrameIndex for start of varargs area for arguments passed in
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/// floating-point registers.
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int VarArgsFPRIndex;
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/// \brief Size of the varargs area for arguments passed in floating-point
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/// registers.
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unsigned VarArgsFPRSize;
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public:
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AArch64FunctionInfo()
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: BytesInStackArgArea(0), ArgumentStackToRestore(0), HasStackFrame(false),
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NumLocalDynamicTLSAccesses(0), VarArgsStackIndex(0), VarArgsGPRIndex(0),
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VarArgsGPRSize(0), VarArgsFPRIndex(0), VarArgsFPRSize(0) {}
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explicit AArch64FunctionInfo(MachineFunction &MF)
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: BytesInStackArgArea(0), ArgumentStackToRestore(0), HasStackFrame(false),
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NumLocalDynamicTLSAccesses(0), VarArgsStackIndex(0), VarArgsGPRIndex(0),
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VarArgsGPRSize(0), VarArgsFPRIndex(0), VarArgsFPRSize(0) {
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(void)MF;
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}
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unsigned getBytesInStackArgArea() const { return BytesInStackArgArea; }
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void setBytesInStackArgArea(unsigned bytes) { BytesInStackArgArea = bytes; }
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unsigned getArgumentStackToRestore() const { return ArgumentStackToRestore; }
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void setArgumentStackToRestore(unsigned bytes) {
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ArgumentStackToRestore = bytes;
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}
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bool hasStackFrame() const { return HasStackFrame; }
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void setHasStackFrame(bool s) { HasStackFrame = s; }
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void setLocalStackSize(unsigned Size) { LocalStackSize = Size; }
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unsigned getLocalStackSize() const { return LocalStackSize; }
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void incNumLocalDynamicTLSAccesses() { ++NumLocalDynamicTLSAccesses; }
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unsigned getNumLocalDynamicTLSAccesses() const {
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return NumLocalDynamicTLSAccesses;
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}
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int getVarArgsStackIndex() const { return VarArgsStackIndex; }
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void setVarArgsStackIndex(int Index) { VarArgsStackIndex = Index; }
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int getVarArgsGPRIndex() const { return VarArgsGPRIndex; }
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void setVarArgsGPRIndex(int Index) { VarArgsGPRIndex = Index; }
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unsigned getVarArgsGPRSize() const { return VarArgsGPRSize; }
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void setVarArgsGPRSize(unsigned Size) { VarArgsGPRSize = Size; }
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int getVarArgsFPRIndex() const { return VarArgsFPRIndex; }
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void setVarArgsFPRIndex(int Index) { VarArgsFPRIndex = Index; }
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unsigned getVarArgsFPRSize() const { return VarArgsFPRSize; }
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void setVarArgsFPRSize(unsigned Size) { VarArgsFPRSize = Size; }
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typedef SmallPtrSet<const MachineInstr *, 16> SetOfInstructions;
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const SetOfInstructions &getLOHRelated() const { return LOHRelated; }
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// Shortcuts for LOH related types.
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class MILOHDirective {
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MCLOHType Kind;
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/// Arguments of this directive. Order matters.
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SmallVector<const MachineInstr *, 3> Args;
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public:
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typedef SmallVectorImpl<const MachineInstr *> LOHArgs;
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MILOHDirective(MCLOHType Kind, const LOHArgs &Args)
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: Kind(Kind), Args(Args.begin(), Args.end()) {
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assert(isValidMCLOHType(Kind) && "Invalid LOH directive type!");
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}
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MCLOHType getKind() const { return Kind; }
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const LOHArgs &getArgs() const { return Args; }
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};
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typedef MILOHDirective::LOHArgs MILOHArgs;
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typedef SmallVector<MILOHDirective, 32> MILOHContainer;
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const MILOHContainer &getLOHContainer() const { return LOHContainerSet; }
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/// Add a LOH directive of this @p Kind and this @p Args.
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void addLOHDirective(MCLOHType Kind, const MILOHArgs &Args) {
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LOHContainerSet.push_back(MILOHDirective(Kind, Args));
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LOHRelated.insert(Args.begin(), Args.end());
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}
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private:
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// Hold the lists of LOHs.
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MILOHContainer LOHContainerSet;
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SetOfInstructions LOHRelated;
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};
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} // End llvm namespace
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#endif
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