LLVM 17.0.0git
MipsABIInfo.cpp
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1//===---- MipsABIInfo.cpp - Information about MIPS ABI's ------------------===//
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#include "MipsABIInfo.h"
10#include "MipsRegisterInfo.h"
11#include "llvm/ADT/StringRef.h"
16
17using namespace llvm;
18
19// Note: this option is defined here to be visible from libLLVMMipsAsmParser
20// and libLLVMMipsCodeGen
22EmitJalrReloc("mips-jalr-reloc", cl::Hidden,
23 cl::desc("MIPS: Emit R_{MICRO}MIPS_JALR relocation with jalr"),
24 cl::init(true));
25
26namespace {
27static const MCPhysReg O32IntRegs[4] = {Mips::A0, Mips::A1, Mips::A2, Mips::A3};
28
29static const MCPhysReg Mips64IntRegs[8] = {
30 Mips::A0_64, Mips::A1_64, Mips::A2_64, Mips::A3_64,
31 Mips::T0_64, Mips::T1_64, Mips::T2_64, Mips::T3_64};
32}
33
35 if (IsO32())
36 return ArrayRef(O32IntRegs);
37 if (IsN32() || IsN64())
38 return ArrayRef(Mips64IntRegs);
39 llvm_unreachable("Unhandled ABI");
40}
41
43 if (IsO32())
44 return ArrayRef(O32IntRegs);
45 if (IsN32() || IsN64())
46 return ArrayRef(Mips64IntRegs);
47 llvm_unreachable("Unhandled ABI");
48}
49
51 if (IsO32())
52 return CC != CallingConv::Fast ? 16 : 0;
53 if (IsN32() || IsN64())
54 return 0;
55 llvm_unreachable("Unhandled ABI");
56}
57
59 const MCTargetOptions &Options) {
60 if (Options.getABIName().startswith("o32"))
61 return MipsABIInfo::O32();
62 if (Options.getABIName().startswith("n32"))
63 return MipsABIInfo::N32();
64 if (Options.getABIName().startswith("n64"))
65 return MipsABIInfo::N64();
66 if (TT.getEnvironment() == llvm::Triple::GNUABIN32)
67 return MipsABIInfo::N32();
68 assert(Options.getABIName().empty() && "Unknown ABI option for MIPS");
69
70 if (TT.isMIPS64())
71 return MipsABIInfo::N64();
72 return MipsABIInfo::O32();
73}
74
75unsigned MipsABIInfo::GetStackPtr() const {
76 return ArePtrs64bit() ? Mips::SP_64 : Mips::SP;
77}
78
79unsigned MipsABIInfo::GetFramePtr() const {
80 return ArePtrs64bit() ? Mips::FP_64 : Mips::FP;
81}
82
83unsigned MipsABIInfo::GetBasePtr() const {
84 return ArePtrs64bit() ? Mips::S7_64 : Mips::S7;
85}
86
87unsigned MipsABIInfo::GetGlobalPtr() const {
88 return ArePtrs64bit() ? Mips::GP_64 : Mips::GP;
89}
90
91unsigned MipsABIInfo::GetNullPtr() const {
92 return ArePtrs64bit() ? Mips::ZERO_64 : Mips::ZERO;
93}
94
95unsigned MipsABIInfo::GetZeroReg() const {
96 return AreGprs64bit() ? Mips::ZERO_64 : Mips::ZERO;
97}
98
99unsigned MipsABIInfo::GetPtrAdduOp() const {
100 return ArePtrs64bit() ? Mips::DADDu : Mips::ADDu;
101}
102
104 return ArePtrs64bit() ? Mips::DADDiu : Mips::ADDiu;
105}
106
108 return ArePtrs64bit() ? Mips::DSUBu : Mips::SUBu;
109}
110
111unsigned MipsABIInfo::GetPtrAndOp() const {
112 return ArePtrs64bit() ? Mips::AND64 : Mips::AND;
113}
114
116 return ArePtrs64bit() ? Mips::OR64 : Mips::OR;
117}
118
119unsigned MipsABIInfo::GetEhDataReg(unsigned I) const {
120 static const unsigned EhDataReg[] = {
121 Mips::A0, Mips::A1, Mips::A2, Mips::A3
122 };
123 static const unsigned EhDataReg64[] = {
124 Mips::A0_64, Mips::A1_64, Mips::A2_64, Mips::A3_64
125 };
126
127 return IsN64() ? EhDataReg64[I] : EhDataReg[I];
128}
129
static LVOptions Options
Definition: LVOptions.cpp:25
Implement a low-level type suitable for MachineInstr level instruction selection.
#define I(x, y, z)
Definition: MD5.cpp:58
cl::opt< bool > EmitJalrReloc("mips-jalr-reloc", cl::Hidden, cl::desc("MIPS: Emit R_{MICRO}MIPS_JALR relocation with jalr"), cl::init(true))
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
ArrayRef - Represent a constant reference to an array (0 or more elements consecutively in memory),...
Definition: ArrayRef.h:41
bool AreGprs64bit() const
Definition: MipsABIInfo.h:74
bool IsN64() const
Definition: MipsABIInfo.h:42
unsigned GetGlobalPtr() const
Definition: MipsABIInfo.cpp:87
static MipsABIInfo O32()
Definition: MipsABIInfo.h:33
unsigned GetEhDataReg(unsigned I) const
ArrayRef< MCPhysReg > GetVarArgRegs() const
The registers to use for the variable argument list.
Definition: MipsABIInfo.cpp:42
bool ArePtrs64bit() const
Definition: MipsABIInfo.h:73
unsigned GetGPRMoveOp() const
unsigned GetStackPtr() const
Definition: MipsABIInfo.cpp:75
static MipsABIInfo N32()
Definition: MipsABIInfo.h:34
unsigned GetZeroReg() const
Definition: MipsABIInfo.cpp:95
unsigned GetCalleeAllocdArgSizeInBytes(CallingConv::ID CC) const
Obtain the size of the area allocated by the callee for arguments.
Definition: MipsABIInfo.cpp:50
static MipsABIInfo N64()
Definition: MipsABIInfo.h:35
unsigned GetPtrAddiuOp() const
unsigned GetPtrAndOp() const
unsigned GetFramePtr() const
Definition: MipsABIInfo.cpp:79
static MipsABIInfo computeTargetABI(const Triple &TT, StringRef CPU, const MCTargetOptions &Options)
Definition: MipsABIInfo.cpp:58
ArrayRef< MCPhysReg > GetByValArgRegs() const
The registers to use for byval arguments.
Definition: MipsABIInfo.cpp:34
unsigned GetNullPtr() const
Definition: MipsABIInfo.cpp:91
unsigned GetPtrAdduOp() const
Definition: MipsABIInfo.cpp:99
bool IsN32() const
Definition: MipsABIInfo.h:41
unsigned GetBasePtr() const
Definition: MipsABIInfo.cpp:83
unsigned GetPtrSubuOp() const
bool IsO32() const
Definition: MipsABIInfo.h:40
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:50
Triple - Helper class for working with autoconf configuration names.
Definition: Triple.h:44
#define llvm_unreachable(msg)
Marks that the current location is not supposed to be reachable.
@ Fast
Attempts to make calls as fast as possible (e.g.
Definition: CallingConv.h:41
initializer< Ty > init(const Ty &Val)
Definition: CommandLine.h:445
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18