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 allocateScavengingFrameIndexesNearIncomingSP(
38     const MachineFunction &MF) const override {
39     return false;
40   }
41 
42   bool enableShrinkWrapping(const MachineFunction &MF) const override {
43     return true;
44   }
45 
46   MachineBasicBlock::iterator
47   eliminateCallFramePseudoInstr(MachineFunction &MF,
48                                 MachineBasicBlock &MBB,
49                                 MachineBasicBlock::iterator I) const override;
50 
51 protected:
52   uint64_t estimateStackSize(const MachineFunction &MF) const;
53 };
54 
55 /// Create MipsFrameLowering objects.
56 const MipsFrameLowering *createMips16FrameLowering(const MipsSubtarget &ST);
57 const MipsFrameLowering *createMipsSEFrameLowering(const MipsSubtarget &ST);
58 
59 } // End llvm namespace
60 
61 #endif
62