1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
|
//===-- SystemZFrameLowering.h - Frame lowering for SystemZ -----*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef SYSTEMZFRAMELOWERING_H
#define SYSTEMZFRAMELOWERING_H
#include "SystemZSubtarget.h"
#include "llvm/ADT/IndexedMap.h"
#include "llvm/Target/TargetFrameLowering.h"
namespace llvm {
class SystemZTargetMachine;
class SystemZSubtarget;
class SystemZFrameLowering : public TargetFrameLowering {
IndexedMap<unsigned> RegSpillOffsets;
protected:
const SystemZTargetMachine &TM;
const SystemZSubtarget &STI;
public:
SystemZFrameLowering(const SystemZTargetMachine &tm,
const SystemZSubtarget &sti);
// Override TargetFrameLowering.
virtual bool isFPCloseToIncomingSP() const LLVM_OVERRIDE { return false; }
virtual const SpillSlot *getCalleeSavedSpillSlots(unsigned &NumEntries) const
LLVM_OVERRIDE;
virtual void
processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
RegScavenger *RS) const LLVM_OVERRIDE;
virtual bool
spillCalleeSavedRegisters(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MBBI,
const std::vector<CalleeSavedInfo> &CSI,
const TargetRegisterInfo *TRI) const
LLVM_OVERRIDE;
virtual bool
restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MBBII,
const std::vector<CalleeSavedInfo> &CSI,
const TargetRegisterInfo *TRI) const
LLVM_OVERRIDE;
virtual void processFunctionBeforeFrameFinalized(MachineFunction &MF,
RegScavenger *RS) const;
virtual void emitPrologue(MachineFunction &MF) const LLVM_OVERRIDE;
virtual void emitEpilogue(MachineFunction &MF,
MachineBasicBlock &MBB) const LLVM_OVERRIDE;
virtual bool hasFP(const MachineFunction &MF) const LLVM_OVERRIDE;
virtual int getFrameIndexOffset(const MachineFunction &MF,
int FI) const LLVM_OVERRIDE;
virtual bool hasReservedCallFrame(const MachineFunction &MF) const
LLVM_OVERRIDE;
virtual void
eliminateCallFramePseudoInstr(MachineFunction &MF,
MachineBasicBlock &MBB,
MachineBasicBlock::iterator MI) const
LLVM_OVERRIDE;
// Return the number of bytes in the callee-allocated part of the frame.
uint64_t getAllocatedStackSize(const MachineFunction &MF) const;
// Return the byte offset from the incoming stack pointer of Reg's
// ABI-defined save slot. Return 0 if no slot is defined for Reg.
unsigned getRegSpillOffset(unsigned Reg) const {
return RegSpillOffsets[Reg];
}
};
} // end namespace llvm
#endif
|
