forked from OSchip/llvm-project
82 lines
3.3 KiB
C++
82 lines
3.3 KiB
C++
//===-- VEFrameLowering.h - Define frame lowering for VE --*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This class implements VE-specific bits of TargetFrameLowering class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_VE_VEFRAMELOWERING_H
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#define LLVM_LIB_TARGET_VE_VEFRAMELOWERING_H
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#include "VE.h"
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#include "llvm/CodeGen/TargetFrameLowering.h"
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namespace llvm {
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class VESubtarget;
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class VEFrameLowering : public TargetFrameLowering {
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public:
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explicit VEFrameLowering(const VESubtarget &ST);
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/// emitProlog/emitEpilog - These methods insert prolog and epilog code into
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/// the function.
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void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
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void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
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void emitPrologueInsns(MachineFunction &MF, MachineBasicBlock &MBB,
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MachineBasicBlock::iterator MBBI, int NumBytes,
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bool RequireFPUpdate) const;
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void emitEpilogueInsns(MachineFunction &MF, MachineBasicBlock &MBB,
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MachineBasicBlock::iterator MBBI, int NumBytes,
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bool RequireFPUpdate) const;
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MachineBasicBlock::iterator
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eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
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MachineBasicBlock::iterator I) const override;
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bool hasReservedCallFrame(const MachineFunction &MF) const override;
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bool hasFP(const MachineFunction &MF) const override;
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void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs,
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RegScavenger *RS = nullptr) const override;
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int getFrameIndexReference(const MachineFunction &MF, int FI,
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Register &FrameReg) const override;
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const SpillSlot *
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getCalleeSavedSpillSlots(unsigned &NumEntries) const override {
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static const SpillSlot Offsets[] = {
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{VE::SX17, 40}, {VE::SX18, 48}, {VE::SX19, 56}, {VE::SX20, 64},
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{VE::SX21, 72}, {VE::SX22, 80}, {VE::SX23, 88}, {VE::SX24, 96},
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{VE::SX25, 104}, {VE::SX26, 112}, {VE::SX27, 120}, {VE::SX28, 128},
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{VE::SX29, 136}, {VE::SX30, 144}, {VE::SX31, 152}, {VE::SX32, 160},
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{VE::SX33, 168}};
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NumEntries = array_lengthof(Offsets);
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return Offsets;
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}
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/// targetHandlesStackFrameRounding - Returns true if the target is
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/// responsible for rounding up the stack frame (probably at emitPrologue
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/// time).
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bool targetHandlesStackFrameRounding() const override { return true; }
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private:
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// Returns true if MF is a leaf procedure.
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bool isLeafProc(MachineFunction &MF) const;
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// Emits code for adjusting SP in function prologue/epilogue.
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void emitSPAdjustment(MachineFunction &MF, MachineBasicBlock &MBB,
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MachineBasicBlock::iterator MBBI, int NumBytes) const;
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// Emits code for extending SP in function prologue/epilogue.
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void emitSPExtend(MachineFunction &MF, MachineBasicBlock &MBB,
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MachineBasicBlock::iterator MBBI, int NumBytes) const;
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};
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} // namespace llvm
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#endif
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