blob: f6d70899aa5c22d1348aaf3efc51118c4c2c21da (
plain)
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
|
//===-- PPCMachineFunctionInfo.h - Private data used for PowerPC --*- C++ -*-=//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by James M. Laskey and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file declares the PowerPC specific subclass of MachineFunctionInfo.
//
//===----------------------------------------------------------------------===//
#ifndef PPC_MACHINE_FUNCTION_INFO_H
#define PPC_MACHINE_FUNCTION_INFO_H
#include "llvm/CodeGen/MachineFunction.h"
namespace llvm {
/// PPCFunctionInfo - This class is derived from MachineFunction private
/// PowerPC target-specific information for each MachineFunction.
class PPCFunctionInfo : public MachineFunctionInfo {
private:
/// FramePointerSaveIndex - Frame index of where the old frame pointer is
/// stored. Also used as an anchor for instructions that need to be altered
/// when using frame pointers (dyna_add, dyna_sub.)
int FramePointerSaveIndex;
/// ReturnAddrSaveIndex - Frame index of where the return address is stored.
///
int ReturnAddrSaveIndex;
/// UsesLR - Indicates whether LR is used in the current function. This is
/// only valid after the initial scan of the function by PEI.
bool UsesLR;
/// LRStoreRequired - The bool indicates whether there is some explicit use of
/// the LR/LR8 stack slot that is not obvious from scanning the code. This
/// requires that the code generator produce a store of LR to the stack on
/// entry, even though LR may otherwise apparently not be used.
bool LRStoreRequired;
public:
PPCFunctionInfo(MachineFunction &MF)
: FramePointerSaveIndex(0), ReturnAddrSaveIndex(0), LRStoreRequired(false){}
int getFramePointerSaveIndex() const { return FramePointerSaveIndex; }
void setFramePointerSaveIndex(int Idx) { FramePointerSaveIndex = Idx; }
int getReturnAddrSaveIndex() const { return ReturnAddrSaveIndex; }
void setReturnAddrSaveIndex(int idx) { ReturnAddrSaveIndex = idx; }
/// UsesLR - This is set when the prolog/epilog inserter does its initial scan
/// of the function, it is true if the LR/LR8 register is ever explicitly
/// accessed/clobbered in the machine function (e.g. by calls and movpctolr,
/// which is used in PIC generation).
void setUsesLR(bool U) { UsesLR = U; }
bool usesLR() const { return UsesLR; }
void setLRStoreRequired() { LRStoreRequired = true; }
bool isLRStoreRequired() const { return LRStoreRequired; }
};
} // end of namespace llvm
#endif
|
