LLVM  14.0.0git
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"
14 
15 using namespace llvm;
16 
17 // Note: this option is defined here to be visible from libLLVMMipsAsmParser
18 // and libLLVMMipsCodeGen
20 EmitJalrReloc("mips-jalr-reloc", cl::Hidden,
21  cl::desc("MIPS: Emit R_{MICRO}MIPS_JALR relocation with jalr"),
22  cl::init(true));
23 
24 namespace {
25 static const MCPhysReg O32IntRegs[4] = {Mips::A0, Mips::A1, Mips::A2, Mips::A3};
26 
27 static const MCPhysReg Mips64IntRegs[8] = {
28  Mips::A0_64, Mips::A1_64, Mips::A2_64, Mips::A3_64,
29  Mips::T0_64, Mips::T1_64, Mips::T2_64, Mips::T3_64};
30 }
31 
33  if (IsO32())
34  return makeArrayRef(O32IntRegs);
35  if (IsN32() || IsN64())
36  return makeArrayRef(Mips64IntRegs);
37  llvm_unreachable("Unhandled ABI");
38 }
39 
41  if (IsO32())
42  return makeArrayRef(O32IntRegs);
43  if (IsN32() || IsN64())
44  return makeArrayRef(Mips64IntRegs);
45  llvm_unreachable("Unhandled ABI");
46 }
47 
49  if (IsO32())
50  return CC != CallingConv::Fast ? 16 : 0;
51  if (IsN32() || IsN64())
52  return 0;
53  llvm_unreachable("Unhandled ABI");
54 }
55 
57  const MCTargetOptions &Options) {
58  if (Options.getABIName().startswith("o32"))
59  return MipsABIInfo::O32();
60  if (Options.getABIName().startswith("n32"))
61  return MipsABIInfo::N32();
62  if (Options.getABIName().startswith("n64"))
63  return MipsABIInfo::N64();
64  if (TT.getEnvironment() == llvm::Triple::GNUABIN32)
65  return MipsABIInfo::N32();
66  assert(Options.getABIName().empty() && "Unknown ABI option for MIPS");
67 
68  if (TT.isMIPS64())
69  return MipsABIInfo::N64();
70  return MipsABIInfo::O32();
71 }
72 
73 unsigned MipsABIInfo::GetStackPtr() const {
74  return ArePtrs64bit() ? Mips::SP_64 : Mips::SP;
75 }
76 
77 unsigned MipsABIInfo::GetFramePtr() const {
78  return ArePtrs64bit() ? Mips::FP_64 : Mips::FP;
79 }
80 
81 unsigned MipsABIInfo::GetBasePtr() const {
82  return ArePtrs64bit() ? Mips::S7_64 : Mips::S7;
83 }
84 
85 unsigned MipsABIInfo::GetGlobalPtr() const {
86  return ArePtrs64bit() ? Mips::GP_64 : Mips::GP;
87 }
88 
89 unsigned MipsABIInfo::GetNullPtr() const {
90  return ArePtrs64bit() ? Mips::ZERO_64 : Mips::ZERO;
91 }
92 
93 unsigned MipsABIInfo::GetZeroReg() const {
94  return AreGprs64bit() ? Mips::ZERO_64 : Mips::ZERO;
95 }
96 
97 unsigned MipsABIInfo::GetPtrAdduOp() const {
98  return ArePtrs64bit() ? Mips::DADDu : Mips::ADDu;
99 }
100 
101 unsigned MipsABIInfo::GetPtrAddiuOp() const {
102  return ArePtrs64bit() ? Mips::DADDiu : Mips::ADDiu;
103 }
104 
105 unsigned MipsABIInfo::GetPtrSubuOp() const {
106  return ArePtrs64bit() ? Mips::DSUBu : Mips::SUBu;
107 }
108 
109 unsigned MipsABIInfo::GetPtrAndOp() const {
110  return ArePtrs64bit() ? Mips::AND64 : Mips::AND;
111 }
112 
113 unsigned MipsABIInfo::GetGPRMoveOp() const {
114  return ArePtrs64bit() ? Mips::OR64 : Mips::OR;
115 }
116 
117 unsigned MipsABIInfo::GetEhDataReg(unsigned I) const {
118  static const unsigned EhDataReg[] = {
119  Mips::A0, Mips::A1, Mips::A2, Mips::A3
120  };
121  static const unsigned EhDataReg64[] = {
122  Mips::A0_64, Mips::A1_64, Mips::A2_64, Mips::A3_64
123  };
124 
125  return IsN64() ? EhDataReg64[I] : EhDataReg[I];
126 }
127 
llvm::MipsABIInfo::GetCalleeAllocdArgSizeInBytes
unsigned GetCalleeAllocdArgSizeInBytes(CallingConv::ID CC) const
Obtain the size of the area allocated by the callee for arguments.
Definition: MipsABIInfo.cpp:48
llvm::MipsABIInfo::IsN64
bool IsN64() const
Definition: MipsABIInfo.h:42
llvm
This file implements support for optimizing divisions by a constant.
Definition: AllocatorList.h:23
llvm::MipsABIInfo::ArePtrs64bit
bool ArePtrs64bit() const
Definition: MipsABIInfo.h:73
llvm::ISD::OR
@ OR
Definition: ISDOpcodes.h:633
MCTargetOptions.h
llvm::MipsABIInfo
Definition: MipsABIInfo.h:22
llvm::MipsABIInfo::GetFramePtr
unsigned GetFramePtr() const
Definition: MipsABIInfo.cpp:77
StringRef.h
llvm::Triple
Triple - Helper class for working with autoconf configuration names.
Definition: Triple.h:45
llvm::cl::Hidden
@ Hidden
Definition: CommandLine.h:143
llvm::MipsABIInfo::AreGprs64bit
bool AreGprs64bit() const
Definition: MipsABIInfo.h:74
llvm::MipsABIInfo::GetByValArgRegs
ArrayRef< MCPhysReg > GetByValArgRegs() const
The registers to use for byval arguments.
Definition: MipsABIInfo.cpp:32
llvm::MipsABIInfo::GetStackPtr
unsigned GetStackPtr() const
Definition: MipsABIInfo.cpp:73
llvm::MipsABIInfo::GetPtrSubuOp
unsigned GetPtrSubuOp() const
Definition: MipsABIInfo.cpp:105
EmitJalrReloc
cl::opt< bool > EmitJalrReloc("mips-jalr-reloc", cl::Hidden, cl::desc("MIPS: Emit R_{MICRO}MIPS_JALR relocation with jalr"), cl::init(true))
CommandLine.h
llvm::MipsABIInfo::GetVarArgRegs
ArrayRef< MCPhysReg > GetVarArgRegs() const
The registers to use for the variable argument list.
Definition: MipsABIInfo.cpp:40
llvm::MipsABIInfo::computeTargetABI
static MipsABIInfo computeTargetABI(const Triple &TT, StringRef CPU, const MCTargetOptions &Options)
Definition: MipsABIInfo.cpp:56
llvm::MipsABIInfo::GetPtrAddiuOp
unsigned GetPtrAddiuOp() const
Definition: MipsABIInfo.cpp:101
MipsRegisterInfo.h
Options
const char LLVMTargetMachineRef LLVMPassBuilderOptionsRef Options
Definition: PassBuilderBindings.cpp:48
llvm::MipsABIInfo::N32
static MipsABIInfo N32()
Definition: MipsABIInfo.h:34
llvm::ISD::AND
@ AND
Bitwise operators - logical and, logical or, logical xor.
Definition: ISDOpcodes.h:632
llvm::CallingConv::ID
unsigned ID
LLVM IR allows to use arbitrary numbers as calling convention identifiers.
Definition: CallingConv.h:24
llvm::cl::opt< bool >
llvm::MipsABIInfo::N64
static MipsABIInfo N64()
Definition: MipsABIInfo.h:35
llvm::MipsABIInfo::GetPtrAndOp
unsigned GetPtrAndOp() const
Definition: MipsABIInfo.cpp:109
I
#define I(x, y, z)
Definition: MD5.cpp:59
llvm::MCPhysReg
uint16_t MCPhysReg
An unsigned integer type large enough to represent all physical registers, but not necessarily virtua...
Definition: MCRegister.h:21
llvm::cl::init
initializer< Ty > init(const Ty &Val)
Definition: CommandLine.h:441
llvm::MipsABIInfo::GetZeroReg
unsigned GetZeroReg() const
Definition: MipsABIInfo.cpp:93
llvm::MipsABIInfo::GetGlobalPtr
unsigned GetGlobalPtr() const
Definition: MipsABIInfo.cpp:85
llvm::MipsABIInfo::GetPtrAdduOp
unsigned GetPtrAdduOp() const
Definition: MipsABIInfo.cpp:97
assert
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
llvm::MipsABIInfo::O32
static MipsABIInfo O32()
Definition: MipsABIInfo.h:33
llvm::MCTargetOptions
Definition: MCTargetOptions.h:36
llvm::Triple::GNUABIN32
@ GNUABIN32
Definition: Triple.h:211
llvm::ArrayRef
ArrayRef - Represent a constant reference to an array (0 or more elements consecutively in memory),...
Definition: APInt.h:32
llvm::StringRef
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:58
llvm_unreachable
#define llvm_unreachable(msg)
Marks that the current location is not supposed to be reachable.
Definition: ErrorHandling.h:134
llvm::MipsABIInfo::GetEhDataReg
unsigned GetEhDataReg(unsigned I) const
Definition: MipsABIInfo.cpp:117
llvm::CallingConv::Fast
@ Fast
Fast - This calling convention attempts to make calls as fast as possible (e.g.
Definition: CallingConv.h:42
llvm::MipsABIInfo::GetGPRMoveOp
unsigned GetGPRMoveOp() const
Definition: MipsABIInfo.cpp:113
MipsABIInfo.h
llvm::MipsABIInfo::IsN32
bool IsN32() const
Definition: MipsABIInfo.h:41
llvm::MipsABIInfo::GetNullPtr
unsigned GetNullPtr() const
Definition: MipsABIInfo.cpp:89
llvm::makeArrayRef
ArrayRef< T > makeArrayRef(const T &OneElt)
Construct an ArrayRef from a single element.
Definition: ArrayRef.h:476
llvm::MipsABIInfo::IsO32
bool IsO32() const
Definition: MipsABIInfo.h:40
llvm::MipsABIInfo::GetBasePtr
unsigned GetBasePtr() const
Definition: MipsABIInfo.cpp:81
llvm::cl::desc
Definition: CommandLine.h:412