1 //===-- MipsISelDAGToDAG.cpp - A Dag to Dag Inst Selector for Mips --------===//
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 defines an instruction selector for the MIPS target.
12 //===----------------------------------------------------------------------===//
14 #include "MipsISelDAGToDAG.h"
15 #include "MCTargetDesc/MipsBaseInfo.h"
17 #include "Mips16ISelDAGToDAG.h"
18 #include "MipsMachineFunction.h"
19 #include "MipsRegisterInfo.h"
20 #include "MipsSEISelDAGToDAG.h"
21 #include "llvm/CodeGen/MachineConstantPool.h"
22 #include "llvm/CodeGen/MachineFrameInfo.h"
23 #include "llvm/CodeGen/MachineFunction.h"
24 #include "llvm/CodeGen/MachineInstrBuilder.h"
25 #include "llvm/CodeGen/MachineRegisterInfo.h"
26 #include "llvm/CodeGen/SelectionDAGNodes.h"
27 #include "llvm/IR/CFG.h"
28 #include "llvm/IR/GlobalValue.h"
29 #include "llvm/IR/Instructions.h"
30 #include "llvm/IR/Intrinsics.h"
31 #include "llvm/IR/Type.h"
32 #include "llvm/Support/Debug.h"
33 #include "llvm/Support/ErrorHandling.h"
34 #include "llvm/Support/raw_ostream.h"
35 #include "llvm/Target/TargetMachine.h"
38 #define DEBUG_TYPE "mips-isel"
40 //===----------------------------------------------------------------------===//
41 // Instruction Selector Implementation
42 //===----------------------------------------------------------------------===//
44 //===----------------------------------------------------------------------===//
45 // MipsDAGToDAGISel - MIPS specific code to select MIPS machine
46 // instructions for SelectionDAG operations.
47 //===----------------------------------------------------------------------===//
49 bool MipsDAGToDAGISel::runOnMachineFunction(MachineFunction &MF) {
50 Subtarget = &static_cast<const MipsSubtarget &>(MF.getSubtarget());
51 bool Ret = SelectionDAGISel::runOnMachineFunction(MF);
53 processFunctionAfterISel(MF);
58 /// getGlobalBaseReg - Output the instructions required to put the
59 /// GOT address into a register.
60 SDNode *MipsDAGToDAGISel::getGlobalBaseReg() {
61 unsigned GlobalBaseReg = MF->getInfo<MipsFunctionInfo>()->getGlobalBaseReg();
62 return CurDAG->getRegister(GlobalBaseReg, getTargetLowering()->getPointerTy(
63 CurDAG->getDataLayout()))
67 /// ComplexPattern used on MipsInstrInfo
68 /// Used on Mips Load/Store instructions
69 bool MipsDAGToDAGISel::selectAddrRegImm(SDValue Addr, SDValue &Base,
70 SDValue &Offset) const {
71 llvm_unreachable("Unimplemented function.");
75 bool MipsDAGToDAGISel::selectAddrDefault(SDValue Addr, SDValue &Base,
76 SDValue &Offset) const {
77 llvm_unreachable("Unimplemented function.");
81 bool MipsDAGToDAGISel::selectIntAddr(SDValue Addr, SDValue &Base,
82 SDValue &Offset) const {
83 llvm_unreachable("Unimplemented function.");
87 bool MipsDAGToDAGISel::selectIntAddr11MM(SDValue Addr, SDValue &Base,
88 SDValue &Offset) const {
89 llvm_unreachable("Unimplemented function.");
93 bool MipsDAGToDAGISel::selectIntAddr12MM(SDValue Addr, SDValue &Base,
94 SDValue &Offset) const {
95 llvm_unreachable("Unimplemented function.");
99 bool MipsDAGToDAGISel::selectIntAddr16MM(SDValue Addr, SDValue &Base,
100 SDValue &Offset) const {
101 llvm_unreachable("Unimplemented function.");
105 bool MipsDAGToDAGISel::selectIntAddrLSL2MM(SDValue Addr, SDValue &Base,
106 SDValue &Offset) const {
107 llvm_unreachable("Unimplemented function.");
111 bool MipsDAGToDAGISel::selectIntAddrSImm10(SDValue Addr, SDValue &Base,
112 SDValue &Offset) const {
113 llvm_unreachable("Unimplemented function.");
117 bool MipsDAGToDAGISel::selectIntAddrSImm10Lsl1(SDValue Addr, SDValue &Base,
118 SDValue &Offset) const {
119 llvm_unreachable("Unimplemented function.");
123 bool MipsDAGToDAGISel::selectIntAddrSImm10Lsl2(SDValue Addr, SDValue &Base,
124 SDValue &Offset) const {
125 llvm_unreachable("Unimplemented function.");
129 bool MipsDAGToDAGISel::selectIntAddrSImm10Lsl3(SDValue Addr, SDValue &Base,
130 SDValue &Offset) const {
131 llvm_unreachable("Unimplemented function.");
135 bool MipsDAGToDAGISel::selectAddr16(SDValue Addr, SDValue &Base,
137 llvm_unreachable("Unimplemented function.");
141 bool MipsDAGToDAGISel::selectAddr16SP(SDValue Addr, SDValue &Base,
143 llvm_unreachable("Unimplemented function.");
147 bool MipsDAGToDAGISel::selectVSplat(SDNode *N, APInt &Imm,
148 unsigned MinSizeInBits) const {
149 llvm_unreachable("Unimplemented function.");
153 bool MipsDAGToDAGISel::selectVSplatUimm1(SDValue N, SDValue &Imm) const {
154 llvm_unreachable("Unimplemented function.");
158 bool MipsDAGToDAGISel::selectVSplatUimm2(SDValue N, SDValue &Imm) const {
159 llvm_unreachable("Unimplemented function.");
163 bool MipsDAGToDAGISel::selectVSplatUimm3(SDValue N, SDValue &Imm) const {
164 llvm_unreachable("Unimplemented function.");
168 bool MipsDAGToDAGISel::selectVSplatUimm4(SDValue N, SDValue &Imm) const {
169 llvm_unreachable("Unimplemented function.");
173 bool MipsDAGToDAGISel::selectVSplatUimm5(SDValue N, SDValue &Imm) const {
174 llvm_unreachable("Unimplemented function.");
178 bool MipsDAGToDAGISel::selectVSplatUimm6(SDValue N, SDValue &Imm) const {
179 llvm_unreachable("Unimplemented function.");
183 bool MipsDAGToDAGISel::selectVSplatUimm8(SDValue N, SDValue &Imm) const {
184 llvm_unreachable("Unimplemented function.");
188 bool MipsDAGToDAGISel::selectVSplatSimm5(SDValue N, SDValue &Imm) const {
189 llvm_unreachable("Unimplemented function.");
193 bool MipsDAGToDAGISel::selectVSplatUimmPow2(SDValue N, SDValue &Imm) const {
194 llvm_unreachable("Unimplemented function.");
198 bool MipsDAGToDAGISel::selectVSplatUimmInvPow2(SDValue N, SDValue &Imm) const {
199 llvm_unreachable("Unimplemented function.");
203 bool MipsDAGToDAGISel::selectVSplatMaskL(SDValue N, SDValue &Imm) const {
204 llvm_unreachable("Unimplemented function.");
208 bool MipsDAGToDAGISel::selectVSplatMaskR(SDValue N, SDValue &Imm) const {
209 llvm_unreachable("Unimplemented function.");
213 /// Select instructions not customized! Used for
214 /// expanded, promoted and normal instructions
215 void MipsDAGToDAGISel::Select(SDNode *Node) {
216 unsigned Opcode = Node->getOpcode();
218 // Dump information about the Node being selected
219 DEBUG(errs() << "Selecting: "; Node->dump(CurDAG); errs() << "\n");
221 // If we have a custom node, we already have selected!
222 if (Node->isMachineOpcode()) {
223 DEBUG(errs() << "== "; Node->dump(CurDAG); errs() << "\n");
228 // See if subclasses can handle this node.
235 // Get target GOT address.
236 case ISD::GLOBAL_OFFSET_TABLE:
237 ReplaceNode(Node, getGlobalBaseReg());
243 assert((Subtarget->systemSupportsUnalignedAccess() ||
244 cast<MemSDNode>(Node)->getMemoryVT().getSizeInBits() / 8 <=
245 cast<MemSDNode>(Node)->getAlignment()) &&
246 "Unexpected unaligned loads/stores.");
251 // Select the default instruction
255 bool MipsDAGToDAGISel::
256 SelectInlineAsmMemoryOperand(const SDValue &Op, unsigned ConstraintID,
257 std::vector<SDValue> &OutOps) {
258 // All memory constraints can at least accept raw pointers.
259 switch(ConstraintID) {
261 llvm_unreachable("Unexpected asm memory constraint");
262 case InlineAsm::Constraint_i:
263 case InlineAsm::Constraint_m:
264 case InlineAsm::Constraint_R:
265 case InlineAsm::Constraint_ZC:
266 OutOps.push_back(Op);