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1 //=- BlackfinFrameLowering.h - Define frame lowering for Blackfin -*- C++ -*-=//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 //
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #ifndef BLACKFIN_FRAMEINFO_H
15 #define BLACKFIN_FRAMEINFO_H
16 
17 #include "Blackfin.h"
18 #include "BlackfinSubtarget.h"
19 #include "llvm/Target/TargetFrameLowering.h"
20 
21 namespace llvm {
22   class BlackfinSubtarget;
23 
24 class BlackfinFrameLowering : public TargetFrameLowering {
25 protected:
26   const BlackfinSubtarget &STI;
27 
28 public:
BlackfinFrameLowering(const BlackfinSubtarget & sti)29   explicit BlackfinFrameLowering(const BlackfinSubtarget &sti)
30     : TargetFrameLowering(TargetFrameLowering::StackGrowsDown, 4, 0), STI(sti) {
31   }
32 
33   /// emitProlog/emitEpilog - These methods insert prolog and epilog code into
34   /// the function.
35   void emitPrologue(MachineFunction &MF) const;
36   void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
37 
38   bool hasFP(const MachineFunction &MF) const;
39   bool hasReservedCallFrame(const MachineFunction &MF) const;
40 
41   void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
42                                             RegScavenger *RS) const;
43 };
44 
45 } // End llvm namespace
46 
47 #endif
48