1 //===-- MipsFrameLowering.h - Define frame lowering for Mips ----*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 //
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #ifndef LLVM_LIB_TARGET_MIPS_MIPSFRAMELOWERING_H
14 #define LLVM_LIB_TARGET_MIPS_MIPSFRAMELOWERING_H
15 
16 #include "Mips.h"
17 #include "llvm/CodeGen/TargetFrameLowering.h"
18 
19 namespace llvm {
20   class MipsSubtarget;
21 
22 class MipsFrameLowering : public TargetFrameLowering {
23 protected:
24   const MipsSubtarget &STI;
25 
26 public:
27   explicit MipsFrameLowering(const MipsSubtarget &sti, Align Alignment)
28       : TargetFrameLowering(StackGrowsDown, Alignment, 0, Alignment), STI(sti) {
29   }
30 
31   static const MipsFrameLowering *create(const MipsSubtarget &ST);
32 
33   bool hasFP(const MachineFunction &MF) const override;
34 
35   bool hasBP(const MachineFunction &MF) const;
36 
37   bool isFPCloseToIncomingSP() const override { return false; }
38 
39   bool enableShrinkWrapping(const MachineFunction &MF) const override {
40     return true;
41   }
42 
43   MachineBasicBlock::iterator
44   eliminateCallFramePseudoInstr(MachineFunction &MF,
45                                 MachineBasicBlock &MBB,
46                                 MachineBasicBlock::iterator I) const override;
47 
48 protected:
49   uint64_t estimateStackSize(const MachineFunction &MF) const;
50 };
51 
52 /// Create MipsFrameLowering objects.
53 const MipsFrameLowering *createMips16FrameLowering(const MipsSubtarget &ST);
54 const MipsFrameLowering *createMipsSEFrameLowering(const MipsSubtarget &ST);
55 
56 } // End llvm namespace
57 
58 #endif
59