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Diffstat (limited to 'gnu/llvm/lib/Target/PowerPC/PPCFrameLowering.h')
| -rw-r--r-- | gnu/llvm/lib/Target/PowerPC/PPCFrameLowering.h | 156 |
1 files changed, 0 insertions, 156 deletions
diff --git a/gnu/llvm/lib/Target/PowerPC/PPCFrameLowering.h b/gnu/llvm/lib/Target/PowerPC/PPCFrameLowering.h deleted file mode 100644 index 69bd1484d6e..00000000000 --- a/gnu/llvm/lib/Target/PowerPC/PPCFrameLowering.h +++ /dev/null @@ -1,156 +0,0 @@ -//===-- PPCFrameLowering.h - Define frame lowering for PowerPC --*- C++ -*-===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -// -//===----------------------------------------------------------------------===// - -#ifndef LLVM_LIB_TARGET_POWERPC_PPCFRAMELOWERING_H -#define LLVM_LIB_TARGET_POWERPC_PPCFRAMELOWERING_H - -#include "PPC.h" -#include "llvm/ADT/STLExtras.h" -#include "llvm/CodeGen/TargetFrameLowering.h" -#include "llvm/Target/TargetMachine.h" - -namespace llvm { -class PPCSubtarget; - -class PPCFrameLowering: public TargetFrameLowering { - const PPCSubtarget &Subtarget; - const unsigned ReturnSaveOffset; - const unsigned TOCSaveOffset; - const unsigned FramePointerSaveOffset; - const unsigned LinkageSize; - const unsigned BasePointerSaveOffset; - - /** - * Find register[s] that can be used in function prologue and epilogue - * - * Find register[s] that can be use as scratch register[s] in function - * prologue and epilogue to save various registers (Link Register, Base - * Pointer, etc.). Prefer R0/R12, if available. Otherwise choose whatever - * register[s] are available. - * - * This method will return true if it is able to find enough unique scratch - * registers (1 or 2 depending on the requirement). If it is unable to find - * enough available registers in the block, it will return false and set - * any passed output parameter that corresponds to a required unique register - * to PPC::NoRegister. - * - * \param[in] MBB The machine basic block to find an available register for - * \param[in] UseAtEnd Specify whether the scratch register will be used at - * the end of the basic block (i.e., will the scratch - * register kill a register defined in the basic block) - * \param[in] TwoUniqueRegsRequired Specify whether this basic block will - * require two unique scratch registers. - * \param[out] SR1 The scratch register to use - * \param[out] SR2 The second scratch register. If this pointer is not null - * the function will attempt to set it to an available - * register regardless of whether there is a hard requirement - * for two unique scratch registers. - * \return true if the required number of registers was found. - * false if the required number of scratch register weren't available. - * If either output parameter refers to a required scratch register - * that isn't available, it will be set to an invalid value. - */ - bool findScratchRegister(MachineBasicBlock *MBB, - bool UseAtEnd, - bool TwoUniqueRegsRequired = false, - unsigned *SR1 = nullptr, - unsigned *SR2 = nullptr) const; - bool twoUniqueScratchRegsRequired(MachineBasicBlock *MBB) const; - - /** - * Create branch instruction for PPC::TCRETURN* (tail call return) - * - * \param[in] MBB that is terminated by PPC::TCRETURN* - */ - void createTailCallBranchInstr(MachineBasicBlock &MBB) const; - -public: - PPCFrameLowering(const PPCSubtarget &STI); - - unsigned determineFrameLayout(MachineFunction &MF, - bool UpdateMF = true, - bool UseEstimate = false) const; - - /// emitProlog/emitEpilog - These methods insert prolog and epilog code into - /// the function. - void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override; - void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override; - - bool hasFP(const MachineFunction &MF) const override; - bool needsFP(const MachineFunction &MF) const; - void replaceFPWithRealFP(MachineFunction &MF) const; - - void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs, - RegScavenger *RS = nullptr) const override; - void processFunctionBeforeFrameFinalized(MachineFunction &MF, - RegScavenger *RS = nullptr) const override; - void addScavengingSpillSlot(MachineFunction &MF, RegScavenger *RS) const; - - bool spillCalleeSavedRegisters(MachineBasicBlock &MBB, - MachineBasicBlock::iterator MI, - const std::vector<CalleeSavedInfo> &CSI, - const TargetRegisterInfo *TRI) const override; - /// This function will assign callee saved gprs to volatile vector registers - /// for prologue spills when applicable. It returns false if there are any - /// registers which were not spilled to volatile vector registers. - bool - assignCalleeSavedSpillSlots(MachineFunction &MF, - const TargetRegisterInfo *TRI, - std::vector<CalleeSavedInfo> &CSI) const override; - - MachineBasicBlock::iterator - eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB, - MachineBasicBlock::iterator I) const override; - - bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB, - MachineBasicBlock::iterator MI, - std::vector<CalleeSavedInfo> &CSI, - const TargetRegisterInfo *TRI) const override; - - /// targetHandlesStackFrameRounding - Returns true if the target is - /// responsible for rounding up the stack frame (probably at emitPrologue - /// time). - bool targetHandlesStackFrameRounding() const override { return true; } - - /// getReturnSaveOffset - Return the previous frame offset to save the - /// return address. - unsigned getReturnSaveOffset() const { return ReturnSaveOffset; } - - /// getTOCSaveOffset - Return the previous frame offset to save the - /// TOC register -- 64-bit SVR4 ABI only. - unsigned getTOCSaveOffset() const { return TOCSaveOffset; } - - /// getFramePointerSaveOffset - Return the previous frame offset to save the - /// frame pointer. - unsigned getFramePointerSaveOffset() const { return FramePointerSaveOffset; } - - /// getBasePointerSaveOffset - Return the previous frame offset to save the - /// base pointer. - unsigned getBasePointerSaveOffset() const { return BasePointerSaveOffset; } - - /// getLinkageSize - Return the size of the PowerPC ABI linkage area. - /// - unsigned getLinkageSize() const { return LinkageSize; } - - const SpillSlot * - getCalleeSavedSpillSlots(unsigned &NumEntries) const override; - - bool enableShrinkWrapping(const MachineFunction &MF) const override; - - /// Methods used by shrink wrapping to determine if MBB can be used for the - /// function prologue/epilogue. - bool canUseAsPrologue(const MachineBasicBlock &MBB) const override; - bool canUseAsEpilogue(const MachineBasicBlock &MBB) const override; -}; -} // End llvm namespace - -#endif |