1 //===-- PPCMachineFunctionInfo.h - Private data used for PowerPC --*- C++ -*-=//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file declares the PowerPC specific subclass of MachineFunctionInfo.
12 //===----------------------------------------------------------------------===//
14 #ifndef PPC_MACHINE_FUNCTION_INFO_H
15 #define PPC_MACHINE_FUNCTION_INFO_H
17 #include "llvm/CodeGen/MachineFunction.h"
21 /// PPCFunctionInfo - This class is derived from MachineFunction private
22 /// PowerPC target-specific information for each MachineFunction.
23 class PPCFunctionInfo : public MachineFunctionInfo {
24 virtual void anchor();
26 /// FramePointerSaveIndex - Frame index of where the old frame pointer is
27 /// stored. Also used as an anchor for instructions that need to be altered
28 /// when using frame pointers (dyna_add, dyna_sub.)
29 int FramePointerSaveIndex;
31 /// ReturnAddrSaveIndex - Frame index of where the return address is stored.
33 int ReturnAddrSaveIndex;
35 /// MustSaveLR - Indicates whether LR is defined (or clobbered) in the current
36 /// function. This is only valid after the initial scan of the function by
40 /// SpillsCR - Indicates whether CR is spilled in the current function.
43 /// LRStoreRequired - The bool indicates whether there is some explicit use of
44 /// the LR/LR8 stack slot that is not obvious from scanning the code. This
45 /// requires that the code generator produce a store of LR to the stack on
46 /// entry, even though LR may otherwise apparently not be used.
49 /// MinReservedArea - This is the frame size that is at least reserved in a
50 /// potential caller (parameter+linkage area).
51 unsigned MinReservedArea;
53 /// TailCallSPDelta - Stack pointer delta used when tail calling. Maximum
54 /// amount the stack pointer is adjusted to make the frame bigger for tail
55 /// calls. Used for creating an area before the register spill area.
58 /// HasFastCall - Does this function contain a fast call. Used to determine
59 /// how the caller's stack pointer should be calculated (epilog/dynamicalloc).
62 /// VarArgsFrameIndex - FrameIndex for start of varargs area.
63 int VarArgsFrameIndex;
64 /// VarArgsStackOffset - StackOffset for start of stack
66 int VarArgsStackOffset;
67 /// VarArgsNumGPR - Index of the first unused integer
68 /// register for parameter passing.
69 unsigned VarArgsNumGPR;
70 /// VarArgsNumFPR - Index of the first unused double
71 /// register for parameter passing.
72 unsigned VarArgsNumFPR;
74 /// CRSpillFrameIndex - FrameIndex for CR spill slot for 32-bit SVR4.
75 int CRSpillFrameIndex;
78 explicit PPCFunctionInfo(MachineFunction &MF)
79 : FramePointerSaveIndex(0),
80 ReturnAddrSaveIndex(0),
82 LRStoreRequired(false),
87 VarArgsStackOffset(0),
90 CRSpillFrameIndex(0) {}
92 int getFramePointerSaveIndex() const { return FramePointerSaveIndex; }
93 void setFramePointerSaveIndex(int Idx) { FramePointerSaveIndex = Idx; }
95 int getReturnAddrSaveIndex() const { return ReturnAddrSaveIndex; }
96 void setReturnAddrSaveIndex(int idx) { ReturnAddrSaveIndex = idx; }
98 unsigned getMinReservedArea() const { return MinReservedArea; }
99 void setMinReservedArea(unsigned size) { MinReservedArea = size; }
101 int getTailCallSPDelta() const { return TailCallSPDelta; }
102 void setTailCallSPDelta(int size) { TailCallSPDelta = size; }
104 /// MustSaveLR - This is set when the prolog/epilog inserter does its initial
105 /// scan of the function. It is true if the LR/LR8 register is ever explicitly
106 /// defined/clobbered in the machine function (e.g. by calls and movpctolr,
107 /// which is used in PIC generation), or if the LR stack slot is explicitly
108 /// referenced by builtin_return_address.
109 void setMustSaveLR(bool U) { MustSaveLR = U; }
110 bool mustSaveLR() const { return MustSaveLR; }
112 void setSpillsCR() { SpillsCR = true; }
113 bool isCRSpilled() const { return SpillsCR; }
115 void setLRStoreRequired() { LRStoreRequired = true; }
116 bool isLRStoreRequired() const { return LRStoreRequired; }
118 void setHasFastCall() { HasFastCall = true; }
119 bool hasFastCall() const { return HasFastCall;}
121 int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
122 void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; }
124 int getVarArgsStackOffset() const { return VarArgsStackOffset; }
125 void setVarArgsStackOffset(int Offset) { VarArgsStackOffset = Offset; }
127 unsigned getVarArgsNumGPR() const { return VarArgsNumGPR; }
128 void setVarArgsNumGPR(unsigned Num) { VarArgsNumGPR = Num; }
130 unsigned getVarArgsNumFPR() const { return VarArgsNumFPR; }
131 void setVarArgsNumFPR(unsigned Num) { VarArgsNumFPR = Num; }
133 int getCRSpillFrameIndex() const { return CRSpillFrameIndex; }
134 void setCRSpillFrameIndex(int idx) { CRSpillFrameIndex = idx; }
137 } // end of namespace llvm