1 //===- X86InstrInfo.cpp - X86 Instruction Information -----------*- 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 contains the X86 implementation of the TargetInstrInfo class.
12 //===----------------------------------------------------------------------===//
14 #include "X86InstrInfo.h"
16 #include "X86GenInstrInfo.inc"
17 #include "X86InstrBuilder.h"
18 #include "X86MachineFunctionInfo.h"
19 #include "X86Subtarget.h"
20 #include "X86TargetMachine.h"
21 #include "llvm/DerivedTypes.h"
22 #include "llvm/LLVMContext.h"
23 #include "llvm/ADT/STLExtras.h"
24 #include "llvm/CodeGen/MachineConstantPool.h"
25 #include "llvm/CodeGen/MachineFrameInfo.h"
26 #include "llvm/CodeGen/MachineInstrBuilder.h"
27 #include "llvm/CodeGen/MachineRegisterInfo.h"
28 #include "llvm/CodeGen/LiveVariables.h"
29 #include "llvm/CodeGen/PseudoSourceValue.h"
30 #include "llvm/MC/MCInst.h"
31 #include "llvm/Support/CommandLine.h"
32 #include "llvm/Support/Debug.h"
33 #include "llvm/Support/ErrorHandling.h"
34 #include "llvm/Support/raw_ostream.h"
35 #include "llvm/Target/TargetOptions.h"
36 #include "llvm/MC/MCAsmInfo.h"
43 NoFusing("disable-spill-fusing",
44 cl::desc("Disable fusing of spill code into instructions"));
46 PrintFailedFusing("print-failed-fuse-candidates",
47 cl::desc("Print instructions that the allocator wants to"
48 " fuse, but the X86 backend currently can't"),
51 ReMatPICStubLoad("remat-pic-stub-load",
52 cl::desc("Re-materialize load from stub in PIC mode"),
53 cl::init(false), cl::Hidden);
55 X86InstrInfo::X86InstrInfo(X86TargetMachine &tm)
56 : TargetInstrInfoImpl(X86Insts, array_lengthof(X86Insts)),
57 TM(tm), RI(tm, *this) {
58 SmallVector<unsigned,16> AmbEntries;
59 static const unsigned OpTbl2Addr[][2] = {
60 { X86::ADC32ri, X86::ADC32mi },
61 { X86::ADC32ri8, X86::ADC32mi8 },
62 { X86::ADC32rr, X86::ADC32mr },
63 { X86::ADC64ri32, X86::ADC64mi32 },
64 { X86::ADC64ri8, X86::ADC64mi8 },
65 { X86::ADC64rr, X86::ADC64mr },
66 { X86::ADD16ri, X86::ADD16mi },
67 { X86::ADD16ri8, X86::ADD16mi8 },
68 { X86::ADD16rr, X86::ADD16mr },
69 { X86::ADD32ri, X86::ADD32mi },
70 { X86::ADD32ri8, X86::ADD32mi8 },
71 { X86::ADD32rr, X86::ADD32mr },
72 { X86::ADD64ri32, X86::ADD64mi32 },
73 { X86::ADD64ri8, X86::ADD64mi8 },
74 { X86::ADD64rr, X86::ADD64mr },
75 { X86::ADD8ri, X86::ADD8mi },
76 { X86::ADD8rr, X86::ADD8mr },
77 { X86::AND16ri, X86::AND16mi },
78 { X86::AND16ri8, X86::AND16mi8 },
79 { X86::AND16rr, X86::AND16mr },
80 { X86::AND32ri, X86::AND32mi },
81 { X86::AND32ri8, X86::AND32mi8 },
82 { X86::AND32rr, X86::AND32mr },
83 { X86::AND64ri32, X86::AND64mi32 },
84 { X86::AND64ri8, X86::AND64mi8 },
85 { X86::AND64rr, X86::AND64mr },
86 { X86::AND8ri, X86::AND8mi },
87 { X86::AND8rr, X86::AND8mr },
88 { X86::DEC16r, X86::DEC16m },
89 { X86::DEC32r, X86::DEC32m },
90 { X86::DEC64_16r, X86::DEC64_16m },
91 { X86::DEC64_32r, X86::DEC64_32m },
92 { X86::DEC64r, X86::DEC64m },
93 { X86::DEC8r, X86::DEC8m },
94 { X86::INC16r, X86::INC16m },
95 { X86::INC32r, X86::INC32m },
96 { X86::INC64_16r, X86::INC64_16m },
97 { X86::INC64_32r, X86::INC64_32m },
98 { X86::INC64r, X86::INC64m },
99 { X86::INC8r, X86::INC8m },
100 { X86::NEG16r, X86::NEG16m },
101 { X86::NEG32r, X86::NEG32m },
102 { X86::NEG64r, X86::NEG64m },
103 { X86::NEG8r, X86::NEG8m },
104 { X86::NOT16r, X86::NOT16m },
105 { X86::NOT32r, X86::NOT32m },
106 { X86::NOT64r, X86::NOT64m },
107 { X86::NOT8r, X86::NOT8m },
108 { X86::OR16ri, X86::OR16mi },
109 { X86::OR16ri8, X86::OR16mi8 },
110 { X86::OR16rr, X86::OR16mr },
111 { X86::OR32ri, X86::OR32mi },
112 { X86::OR32ri8, X86::OR32mi8 },
113 { X86::OR32rr, X86::OR32mr },
114 { X86::OR64ri32, X86::OR64mi32 },
115 { X86::OR64ri8, X86::OR64mi8 },
116 { X86::OR64rr, X86::OR64mr },
117 { X86::OR8ri, X86::OR8mi },
118 { X86::OR8rr, X86::OR8mr },
119 { X86::ROL16r1, X86::ROL16m1 },
120 { X86::ROL16rCL, X86::ROL16mCL },
121 { X86::ROL16ri, X86::ROL16mi },
122 { X86::ROL32r1, X86::ROL32m1 },
123 { X86::ROL32rCL, X86::ROL32mCL },
124 { X86::ROL32ri, X86::ROL32mi },
125 { X86::ROL64r1, X86::ROL64m1 },
126 { X86::ROL64rCL, X86::ROL64mCL },
127 { X86::ROL64ri, X86::ROL64mi },
128 { X86::ROL8r1, X86::ROL8m1 },
129 { X86::ROL8rCL, X86::ROL8mCL },
130 { X86::ROL8ri, X86::ROL8mi },
131 { X86::ROR16r1, X86::ROR16m1 },
132 { X86::ROR16rCL, X86::ROR16mCL },
133 { X86::ROR16ri, X86::ROR16mi },
134 { X86::ROR32r1, X86::ROR32m1 },
135 { X86::ROR32rCL, X86::ROR32mCL },
136 { X86::ROR32ri, X86::ROR32mi },
137 { X86::ROR64r1, X86::ROR64m1 },
138 { X86::ROR64rCL, X86::ROR64mCL },
139 { X86::ROR64ri, X86::ROR64mi },
140 { X86::ROR8r1, X86::ROR8m1 },
141 { X86::ROR8rCL, X86::ROR8mCL },
142 { X86::ROR8ri, X86::ROR8mi },
143 { X86::SAR16r1, X86::SAR16m1 },
144 { X86::SAR16rCL, X86::SAR16mCL },
145 { X86::SAR16ri, X86::SAR16mi },
146 { X86::SAR32r1, X86::SAR32m1 },
147 { X86::SAR32rCL, X86::SAR32mCL },
148 { X86::SAR32ri, X86::SAR32mi },
149 { X86::SAR64r1, X86::SAR64m1 },
150 { X86::SAR64rCL, X86::SAR64mCL },
151 { X86::SAR64ri, X86::SAR64mi },
152 { X86::SAR8r1, X86::SAR8m1 },
153 { X86::SAR8rCL, X86::SAR8mCL },
154 { X86::SAR8ri, X86::SAR8mi },
155 { X86::SBB32ri, X86::SBB32mi },
156 { X86::SBB32ri8, X86::SBB32mi8 },
157 { X86::SBB32rr, X86::SBB32mr },
158 { X86::SBB64ri32, X86::SBB64mi32 },
159 { X86::SBB64ri8, X86::SBB64mi8 },
160 { X86::SBB64rr, X86::SBB64mr },
161 { X86::SHL16rCL, X86::SHL16mCL },
162 { X86::SHL16ri, X86::SHL16mi },
163 { X86::SHL32rCL, X86::SHL32mCL },
164 { X86::SHL32ri, X86::SHL32mi },
165 { X86::SHL64rCL, X86::SHL64mCL },
166 { X86::SHL64ri, X86::SHL64mi },
167 { X86::SHL8rCL, X86::SHL8mCL },
168 { X86::SHL8ri, X86::SHL8mi },
169 { X86::SHLD16rrCL, X86::SHLD16mrCL },
170 { X86::SHLD16rri8, X86::SHLD16mri8 },
171 { X86::SHLD32rrCL, X86::SHLD32mrCL },
172 { X86::SHLD32rri8, X86::SHLD32mri8 },
173 { X86::SHLD64rrCL, X86::SHLD64mrCL },
174 { X86::SHLD64rri8, X86::SHLD64mri8 },
175 { X86::SHR16r1, X86::SHR16m1 },
176 { X86::SHR16rCL, X86::SHR16mCL },
177 { X86::SHR16ri, X86::SHR16mi },
178 { X86::SHR32r1, X86::SHR32m1 },
179 { X86::SHR32rCL, X86::SHR32mCL },
180 { X86::SHR32ri, X86::SHR32mi },
181 { X86::SHR64r1, X86::SHR64m1 },
182 { X86::SHR64rCL, X86::SHR64mCL },
183 { X86::SHR64ri, X86::SHR64mi },
184 { X86::SHR8r1, X86::SHR8m1 },
185 { X86::SHR8rCL, X86::SHR8mCL },
186 { X86::SHR8ri, X86::SHR8mi },
187 { X86::SHRD16rrCL, X86::SHRD16mrCL },
188 { X86::SHRD16rri8, X86::SHRD16mri8 },
189 { X86::SHRD32rrCL, X86::SHRD32mrCL },
190 { X86::SHRD32rri8, X86::SHRD32mri8 },
191 { X86::SHRD64rrCL, X86::SHRD64mrCL },
192 { X86::SHRD64rri8, X86::SHRD64mri8 },
193 { X86::SUB16ri, X86::SUB16mi },
194 { X86::SUB16ri8, X86::SUB16mi8 },
195 { X86::SUB16rr, X86::SUB16mr },
196 { X86::SUB32ri, X86::SUB32mi },
197 { X86::SUB32ri8, X86::SUB32mi8 },
198 { X86::SUB32rr, X86::SUB32mr },
199 { X86::SUB64ri32, X86::SUB64mi32 },
200 { X86::SUB64ri8, X86::SUB64mi8 },
201 { X86::SUB64rr, X86::SUB64mr },
202 { X86::SUB8ri, X86::SUB8mi },
203 { X86::SUB8rr, X86::SUB8mr },
204 { X86::XOR16ri, X86::XOR16mi },
205 { X86::XOR16ri8, X86::XOR16mi8 },
206 { X86::XOR16rr, X86::XOR16mr },
207 { X86::XOR32ri, X86::XOR32mi },
208 { X86::XOR32ri8, X86::XOR32mi8 },
209 { X86::XOR32rr, X86::XOR32mr },
210 { X86::XOR64ri32, X86::XOR64mi32 },
211 { X86::XOR64ri8, X86::XOR64mi8 },
212 { X86::XOR64rr, X86::XOR64mr },
213 { X86::XOR8ri, X86::XOR8mi },
214 { X86::XOR8rr, X86::XOR8mr }
217 for (unsigned i = 0, e = array_lengthof(OpTbl2Addr); i != e; ++i) {
218 unsigned RegOp = OpTbl2Addr[i][0];
219 unsigned MemOp = OpTbl2Addr[i][1];
220 if (!RegOp2MemOpTable2Addr.insert(std::make_pair((unsigned*)RegOp,
221 std::make_pair(MemOp,0))).second)
222 assert(false && "Duplicated entries?");
223 // Index 0, folded load and store, no alignment requirement.
224 unsigned AuxInfo = 0 | (1 << 4) | (1 << 5);
225 if (!MemOp2RegOpTable.insert(std::make_pair((unsigned*)MemOp,
226 std::make_pair(RegOp,
228 AmbEntries.push_back(MemOp);
231 // If the third value is 1, then it's folding either a load or a store.
232 static const unsigned OpTbl0[][4] = {
233 { X86::BT16ri8, X86::BT16mi8, 1, 0 },
234 { X86::BT32ri8, X86::BT32mi8, 1, 0 },
235 { X86::BT64ri8, X86::BT64mi8, 1, 0 },
236 { X86::CALL32r, X86::CALL32m, 1, 0 },
237 { X86::CALL64r, X86::CALL64m, 1, 0 },
238 { X86::CMP16ri, X86::CMP16mi, 1, 0 },
239 { X86::CMP16ri8, X86::CMP16mi8, 1, 0 },
240 { X86::CMP16rr, X86::CMP16mr, 1, 0 },
241 { X86::CMP32ri, X86::CMP32mi, 1, 0 },
242 { X86::CMP32ri8, X86::CMP32mi8, 1, 0 },
243 { X86::CMP32rr, X86::CMP32mr, 1, 0 },
244 { X86::CMP64ri32, X86::CMP64mi32, 1, 0 },
245 { X86::CMP64ri8, X86::CMP64mi8, 1, 0 },
246 { X86::CMP64rr, X86::CMP64mr, 1, 0 },
247 { X86::CMP8ri, X86::CMP8mi, 1, 0 },
248 { X86::CMP8rr, X86::CMP8mr, 1, 0 },
249 { X86::DIV16r, X86::DIV16m, 1, 0 },
250 { X86::DIV32r, X86::DIV32m, 1, 0 },
251 { X86::DIV64r, X86::DIV64m, 1, 0 },
252 { X86::DIV8r, X86::DIV8m, 1, 0 },
253 { X86::EXTRACTPSrr, X86::EXTRACTPSmr, 0, 16 },
254 { X86::FsMOVAPDrr, X86::MOVSDmr, 0, 0 },
255 { X86::FsMOVAPSrr, X86::MOVSSmr, 0, 0 },
256 { X86::IDIV16r, X86::IDIV16m, 1, 0 },
257 { X86::IDIV32r, X86::IDIV32m, 1, 0 },
258 { X86::IDIV64r, X86::IDIV64m, 1, 0 },
259 { X86::IDIV8r, X86::IDIV8m, 1, 0 },
260 { X86::IMUL16r, X86::IMUL16m, 1, 0 },
261 { X86::IMUL32r, X86::IMUL32m, 1, 0 },
262 { X86::IMUL64r, X86::IMUL64m, 1, 0 },
263 { X86::IMUL8r, X86::IMUL8m, 1, 0 },
264 { X86::JMP32r, X86::JMP32m, 1, 0 },
265 { X86::JMP64r, X86::JMP64m, 1, 0 },
266 { X86::MOV16ri, X86::MOV16mi, 0, 0 },
267 { X86::MOV16rr, X86::MOV16mr, 0, 0 },
268 { X86::MOV32ri, X86::MOV32mi, 0, 0 },
269 { X86::MOV32rr, X86::MOV32mr, 0, 0 },
270 { X86::MOV32rr_TC, X86::MOV32mr_TC, 0, 0 },
271 { X86::MOV64ri32, X86::MOV64mi32, 0, 0 },
272 { X86::MOV64rr, X86::MOV64mr, 0, 0 },
273 { X86::MOV8ri, X86::MOV8mi, 0, 0 },
274 { X86::MOV8rr, X86::MOV8mr, 0, 0 },
275 { X86::MOV8rr_NOREX, X86::MOV8mr_NOREX, 0, 0 },
276 { X86::MOVAPDrr, X86::MOVAPDmr, 0, 16 },
277 { X86::MOVAPSrr, X86::MOVAPSmr, 0, 16 },
278 { X86::MOVDQArr, X86::MOVDQAmr, 0, 16 },
279 { X86::MOVPDI2DIrr, X86::MOVPDI2DImr, 0, 0 },
280 { X86::MOVPQIto64rr,X86::MOVPQI2QImr, 0, 0 },
281 { X86::MOVSDto64rr, X86::MOVSDto64mr, 0, 0 },
282 { X86::MOVSS2DIrr, X86::MOVSS2DImr, 0, 0 },
283 { X86::MOVUPDrr, X86::MOVUPDmr, 0, 0 },
284 { X86::MOVUPSrr, X86::MOVUPSmr, 0, 0 },
285 { X86::MUL16r, X86::MUL16m, 1, 0 },
286 { X86::MUL32r, X86::MUL32m, 1, 0 },
287 { X86::MUL64r, X86::MUL64m, 1, 0 },
288 { X86::MUL8r, X86::MUL8m, 1, 0 },
289 { X86::SETAEr, X86::SETAEm, 0, 0 },
290 { X86::SETAr, X86::SETAm, 0, 0 },
291 { X86::SETBEr, X86::SETBEm, 0, 0 },
292 { X86::SETBr, X86::SETBm, 0, 0 },
293 { X86::SETEr, X86::SETEm, 0, 0 },
294 { X86::SETGEr, X86::SETGEm, 0, 0 },
295 { X86::SETGr, X86::SETGm, 0, 0 },
296 { X86::SETLEr, X86::SETLEm, 0, 0 },
297 { X86::SETLr, X86::SETLm, 0, 0 },
298 { X86::SETNEr, X86::SETNEm, 0, 0 },
299 { X86::SETNOr, X86::SETNOm, 0, 0 },
300 { X86::SETNPr, X86::SETNPm, 0, 0 },
301 { X86::SETNSr, X86::SETNSm, 0, 0 },
302 { X86::SETOr, X86::SETOm, 0, 0 },
303 { X86::SETPr, X86::SETPm, 0, 0 },
304 { X86::SETSr, X86::SETSm, 0, 0 },
305 { X86::TAILJMPr, X86::TAILJMPm, 1, 0 },
306 { X86::TAILJMPr64, X86::TAILJMPm64, 1, 0 },
307 { X86::TEST16ri, X86::TEST16mi, 1, 0 },
308 { X86::TEST32ri, X86::TEST32mi, 1, 0 },
309 { X86::TEST64ri32, X86::TEST64mi32, 1, 0 },
310 { X86::TEST8ri, X86::TEST8mi, 1, 0 }
313 for (unsigned i = 0, e = array_lengthof(OpTbl0); i != e; ++i) {
314 unsigned RegOp = OpTbl0[i][0];
315 unsigned MemOp = OpTbl0[i][1];
316 unsigned Align = OpTbl0[i][3];
317 if (!RegOp2MemOpTable0.insert(std::make_pair((unsigned*)RegOp,
318 std::make_pair(MemOp,Align))).second)
319 assert(false && "Duplicated entries?");
320 unsigned FoldedLoad = OpTbl0[i][2];
321 // Index 0, folded load or store.
322 unsigned AuxInfo = 0 | (FoldedLoad << 4) | ((FoldedLoad^1) << 5);
323 if (RegOp != X86::FsMOVAPDrr && RegOp != X86::FsMOVAPSrr)
324 if (!MemOp2RegOpTable.insert(std::make_pair((unsigned*)MemOp,
325 std::make_pair(RegOp, AuxInfo))).second)
326 AmbEntries.push_back(MemOp);
329 static const unsigned OpTbl1[][3] = {
330 { X86::CMP16rr, X86::CMP16rm, 0 },
331 { X86::CMP32rr, X86::CMP32rm, 0 },
332 { X86::CMP64rr, X86::CMP64rm, 0 },
333 { X86::CMP8rr, X86::CMP8rm, 0 },
334 { X86::CVTSD2SSrr, X86::CVTSD2SSrm, 0 },
335 { X86::CVTSI2SD64rr, X86::CVTSI2SD64rm, 0 },
336 { X86::CVTSI2SDrr, X86::CVTSI2SDrm, 0 },
337 { X86::CVTSI2SS64rr, X86::CVTSI2SS64rm, 0 },
338 { X86::CVTSI2SSrr, X86::CVTSI2SSrm, 0 },
339 { X86::CVTSS2SDrr, X86::CVTSS2SDrm, 0 },
340 { X86::CVTTSD2SI64rr, X86::CVTTSD2SI64rm, 0 },
341 { X86::CVTTSD2SIrr, X86::CVTTSD2SIrm, 0 },
342 { X86::CVTTSS2SI64rr, X86::CVTTSS2SI64rm, 0 },
343 { X86::CVTTSS2SIrr, X86::CVTTSS2SIrm, 0 },
344 { X86::FsMOVAPDrr, X86::MOVSDrm, 0 },
345 { X86::FsMOVAPSrr, X86::MOVSSrm, 0 },
346 { X86::IMUL16rri, X86::IMUL16rmi, 0 },
347 { X86::IMUL16rri8, X86::IMUL16rmi8, 0 },
348 { X86::IMUL32rri, X86::IMUL32rmi, 0 },
349 { X86::IMUL32rri8, X86::IMUL32rmi8, 0 },
350 { X86::IMUL64rri32, X86::IMUL64rmi32, 0 },
351 { X86::IMUL64rri8, X86::IMUL64rmi8, 0 },
352 { X86::Int_CMPSDrr, X86::Int_CMPSDrm, 0 },
353 { X86::Int_CMPSSrr, X86::Int_CMPSSrm, 0 },
354 { X86::Int_COMISDrr, X86::Int_COMISDrm, 0 },
355 { X86::Int_COMISSrr, X86::Int_COMISSrm, 0 },
356 { X86::Int_CVTDQ2PDrr, X86::Int_CVTDQ2PDrm, 16 },
357 { X86::Int_CVTDQ2PSrr, X86::Int_CVTDQ2PSrm, 16 },
358 { X86::Int_CVTPD2DQrr, X86::Int_CVTPD2DQrm, 16 },
359 { X86::Int_CVTPD2PSrr, X86::Int_CVTPD2PSrm, 16 },
360 { X86::Int_CVTPS2DQrr, X86::Int_CVTPS2DQrm, 16 },
361 { X86::Int_CVTPS2PDrr, X86::Int_CVTPS2PDrm, 0 },
362 { X86::Int_CVTSD2SI64rr,X86::Int_CVTSD2SI64rm, 0 },
363 { X86::Int_CVTSD2SIrr, X86::Int_CVTSD2SIrm, 0 },
364 { X86::Int_CVTSD2SSrr, X86::Int_CVTSD2SSrm, 0 },
365 { X86::Int_CVTSI2SD64rr,X86::Int_CVTSI2SD64rm, 0 },
366 { X86::Int_CVTSI2SDrr, X86::Int_CVTSI2SDrm, 0 },
367 { X86::Int_CVTSI2SS64rr,X86::Int_CVTSI2SS64rm, 0 },
368 { X86::Int_CVTSI2SSrr, X86::Int_CVTSI2SSrm, 0 },
369 { X86::Int_CVTSS2SDrr, X86::Int_CVTSS2SDrm, 0 },
370 { X86::Int_CVTSS2SI64rr,X86::Int_CVTSS2SI64rm, 0 },
371 { X86::Int_CVTSS2SIrr, X86::Int_CVTSS2SIrm, 0 },
372 { X86::Int_CVTTPD2DQrr, X86::Int_CVTTPD2DQrm, 16 },
373 { X86::Int_CVTTPS2DQrr, X86::Int_CVTTPS2DQrm, 16 },
374 { X86::Int_CVTTSD2SI64rr,X86::Int_CVTTSD2SI64rm, 0 },
375 { X86::Int_CVTTSD2SIrr, X86::Int_CVTTSD2SIrm, 0 },
376 { X86::Int_CVTTSS2SI64rr,X86::Int_CVTTSS2SI64rm, 0 },
377 { X86::Int_CVTTSS2SIrr, X86::Int_CVTTSS2SIrm, 0 },
378 { X86::Int_UCOMISDrr, X86::Int_UCOMISDrm, 0 },
379 { X86::Int_UCOMISSrr, X86::Int_UCOMISSrm, 0 },
380 { X86::MOV16rr, X86::MOV16rm, 0 },
381 { X86::MOV32rr, X86::MOV32rm, 0 },
382 { X86::MOV32rr_TC, X86::MOV32rm_TC, 0 },
383 { X86::MOV64rr, X86::MOV64rm, 0 },
384 { X86::MOV64toPQIrr, X86::MOVQI2PQIrm, 0 },
385 { X86::MOV64toSDrr, X86::MOV64toSDrm, 0 },
386 { X86::MOV8rr, X86::MOV8rm, 0 },
387 { X86::MOVAPDrr, X86::MOVAPDrm, 16 },
388 { X86::MOVAPSrr, X86::MOVAPSrm, 16 },
389 { X86::MOVDDUPrr, X86::MOVDDUPrm, 0 },
390 { X86::MOVDI2PDIrr, X86::MOVDI2PDIrm, 0 },
391 { X86::MOVDI2SSrr, X86::MOVDI2SSrm, 0 },
392 { X86::MOVDQArr, X86::MOVDQArm, 16 },
393 { X86::MOVSHDUPrr, X86::MOVSHDUPrm, 16 },
394 { X86::MOVSLDUPrr, X86::MOVSLDUPrm, 16 },
395 { X86::MOVSX16rr8, X86::MOVSX16rm8, 0 },
396 { X86::MOVSX32rr16, X86::MOVSX32rm16, 0 },
397 { X86::MOVSX32rr8, X86::MOVSX32rm8, 0 },
398 { X86::MOVSX64rr16, X86::MOVSX64rm16, 0 },
399 { X86::MOVSX64rr32, X86::MOVSX64rm32, 0 },
400 { X86::MOVSX64rr8, X86::MOVSX64rm8, 0 },
401 { X86::MOVUPDrr, X86::MOVUPDrm, 16 },
402 { X86::MOVUPSrr, X86::MOVUPSrm, 0 },
403 { X86::MOVZDI2PDIrr, X86::MOVZDI2PDIrm, 0 },
404 { X86::MOVZQI2PQIrr, X86::MOVZQI2PQIrm, 0 },
405 { X86::MOVZPQILo2PQIrr, X86::MOVZPQILo2PQIrm, 16 },
406 { X86::MOVZX16rr8, X86::MOVZX16rm8, 0 },
407 { X86::MOVZX32rr16, X86::MOVZX32rm16, 0 },
408 { X86::MOVZX32_NOREXrr8, X86::MOVZX32_NOREXrm8, 0 },
409 { X86::MOVZX32rr8, X86::MOVZX32rm8, 0 },
410 { X86::MOVZX64rr16, X86::MOVZX64rm16, 0 },
411 { X86::MOVZX64rr32, X86::MOVZX64rm32, 0 },
412 { X86::MOVZX64rr8, X86::MOVZX64rm8, 0 },
413 { X86::PSHUFDri, X86::PSHUFDmi, 16 },
414 { X86::PSHUFHWri, X86::PSHUFHWmi, 16 },
415 { X86::PSHUFLWri, X86::PSHUFLWmi, 16 },
416 { X86::RCPPSr, X86::RCPPSm, 16 },
417 { X86::RCPPSr_Int, X86::RCPPSm_Int, 16 },
418 { X86::RSQRTPSr, X86::RSQRTPSm, 16 },
419 { X86::RSQRTPSr_Int, X86::RSQRTPSm_Int, 16 },
420 { X86::RSQRTSSr, X86::RSQRTSSm, 0 },
421 { X86::RSQRTSSr_Int, X86::RSQRTSSm_Int, 0 },
422 { X86::SQRTPDr, X86::SQRTPDm, 16 },
423 { X86::SQRTPDr_Int, X86::SQRTPDm_Int, 16 },
424 { X86::SQRTPSr, X86::SQRTPSm, 16 },
425 { X86::SQRTPSr_Int, X86::SQRTPSm_Int, 16 },
426 { X86::SQRTSDr, X86::SQRTSDm, 0 },
427 { X86::SQRTSDr_Int, X86::SQRTSDm_Int, 0 },
428 { X86::SQRTSSr, X86::SQRTSSm, 0 },
429 { X86::SQRTSSr_Int, X86::SQRTSSm_Int, 0 },
430 { X86::TEST16rr, X86::TEST16rm, 0 },
431 { X86::TEST32rr, X86::TEST32rm, 0 },
432 { X86::TEST64rr, X86::TEST64rm, 0 },
433 { X86::TEST8rr, X86::TEST8rm, 0 },
434 // FIXME: TEST*rr EAX,EAX ---> CMP [mem], 0
435 { X86::UCOMISDrr, X86::UCOMISDrm, 0 },
436 { X86::UCOMISSrr, X86::UCOMISSrm, 0 }
439 for (unsigned i = 0, e = array_lengthof(OpTbl1); i != e; ++i) {
440 unsigned RegOp = OpTbl1[i][0];
441 unsigned MemOp = OpTbl1[i][1];
442 unsigned Align = OpTbl1[i][2];
443 if (!RegOp2MemOpTable1.insert(std::make_pair((unsigned*)RegOp,
444 std::make_pair(MemOp,Align))).second)
445 assert(false && "Duplicated entries?");
446 // Index 1, folded load
447 unsigned AuxInfo = 1 | (1 << 4);
448 if (RegOp != X86::FsMOVAPDrr && RegOp != X86::FsMOVAPSrr)
449 if (!MemOp2RegOpTable.insert(std::make_pair((unsigned*)MemOp,
450 std::make_pair(RegOp, AuxInfo))).second)
451 AmbEntries.push_back(MemOp);
454 static const unsigned OpTbl2[][3] = {
455 { X86::ADC32rr, X86::ADC32rm, 0 },
456 { X86::ADC64rr, X86::ADC64rm, 0 },
457 { X86::ADD16rr, X86::ADD16rm, 0 },
458 { X86::ADD32rr, X86::ADD32rm, 0 },
459 { X86::ADD64rr, X86::ADD64rm, 0 },
460 { X86::ADD8rr, X86::ADD8rm, 0 },
461 { X86::ADDPDrr, X86::ADDPDrm, 16 },
462 { X86::ADDPSrr, X86::ADDPSrm, 16 },
463 { X86::ADDSDrr, X86::ADDSDrm, 0 },
464 { X86::ADDSSrr, X86::ADDSSrm, 0 },
465 { X86::ADDSUBPDrr, X86::ADDSUBPDrm, 16 },
466 { X86::ADDSUBPSrr, X86::ADDSUBPSrm, 16 },
467 { X86::AND16rr, X86::AND16rm, 0 },
468 { X86::AND32rr, X86::AND32rm, 0 },
469 { X86::AND64rr, X86::AND64rm, 0 },
470 { X86::AND8rr, X86::AND8rm, 0 },
471 { X86::ANDNPDrr, X86::ANDNPDrm, 16 },
472 { X86::ANDNPSrr, X86::ANDNPSrm, 16 },
473 { X86::ANDPDrr, X86::ANDPDrm, 16 },
474 { X86::ANDPSrr, X86::ANDPSrm, 16 },
475 { X86::CMOVA16rr, X86::CMOVA16rm, 0 },
476 { X86::CMOVA32rr, X86::CMOVA32rm, 0 },
477 { X86::CMOVA64rr, X86::CMOVA64rm, 0 },
478 { X86::CMOVAE16rr, X86::CMOVAE16rm, 0 },
479 { X86::CMOVAE32rr, X86::CMOVAE32rm, 0 },
480 { X86::CMOVAE64rr, X86::CMOVAE64rm, 0 },
481 { X86::CMOVB16rr, X86::CMOVB16rm, 0 },
482 { X86::CMOVB32rr, X86::CMOVB32rm, 0 },
483 { X86::CMOVB64rr, X86::CMOVB64rm, 0 },
484 { X86::CMOVBE16rr, X86::CMOVBE16rm, 0 },
485 { X86::CMOVBE32rr, X86::CMOVBE32rm, 0 },
486 { X86::CMOVBE64rr, X86::CMOVBE64rm, 0 },
487 { X86::CMOVE16rr, X86::CMOVE16rm, 0 },
488 { X86::CMOVE32rr, X86::CMOVE32rm, 0 },
489 { X86::CMOVE64rr, X86::CMOVE64rm, 0 },
490 { X86::CMOVG16rr, X86::CMOVG16rm, 0 },
491 { X86::CMOVG32rr, X86::CMOVG32rm, 0 },
492 { X86::CMOVG64rr, X86::CMOVG64rm, 0 },
493 { X86::CMOVGE16rr, X86::CMOVGE16rm, 0 },
494 { X86::CMOVGE32rr, X86::CMOVGE32rm, 0 },
495 { X86::CMOVGE64rr, X86::CMOVGE64rm, 0 },
496 { X86::CMOVL16rr, X86::CMOVL16rm, 0 },
497 { X86::CMOVL32rr, X86::CMOVL32rm, 0 },
498 { X86::CMOVL64rr, X86::CMOVL64rm, 0 },
499 { X86::CMOVLE16rr, X86::CMOVLE16rm, 0 },
500 { X86::CMOVLE32rr, X86::CMOVLE32rm, 0 },
501 { X86::CMOVLE64rr, X86::CMOVLE64rm, 0 },
502 { X86::CMOVNE16rr, X86::CMOVNE16rm, 0 },
503 { X86::CMOVNE32rr, X86::CMOVNE32rm, 0 },
504 { X86::CMOVNE64rr, X86::CMOVNE64rm, 0 },
505 { X86::CMOVNO16rr, X86::CMOVNO16rm, 0 },
506 { X86::CMOVNO32rr, X86::CMOVNO32rm, 0 },
507 { X86::CMOVNO64rr, X86::CMOVNO64rm, 0 },
508 { X86::CMOVNP16rr, X86::CMOVNP16rm, 0 },
509 { X86::CMOVNP32rr, X86::CMOVNP32rm, 0 },
510 { X86::CMOVNP64rr, X86::CMOVNP64rm, 0 },
511 { X86::CMOVNS16rr, X86::CMOVNS16rm, 0 },
512 { X86::CMOVNS32rr, X86::CMOVNS32rm, 0 },
513 { X86::CMOVNS64rr, X86::CMOVNS64rm, 0 },
514 { X86::CMOVO16rr, X86::CMOVO16rm, 0 },
515 { X86::CMOVO32rr, X86::CMOVO32rm, 0 },
516 { X86::CMOVO64rr, X86::CMOVO64rm, 0 },
517 { X86::CMOVP16rr, X86::CMOVP16rm, 0 },
518 { X86::CMOVP32rr, X86::CMOVP32rm, 0 },
519 { X86::CMOVP64rr, X86::CMOVP64rm, 0 },
520 { X86::CMOVS16rr, X86::CMOVS16rm, 0 },
521 { X86::CMOVS32rr, X86::CMOVS32rm, 0 },
522 { X86::CMOVS64rr, X86::CMOVS64rm, 0 },
523 { X86::CMPPDrri, X86::CMPPDrmi, 16 },
524 { X86::CMPPSrri, X86::CMPPSrmi, 16 },
525 { X86::CMPSDrr, X86::CMPSDrm, 0 },
526 { X86::CMPSSrr, X86::CMPSSrm, 0 },
527 { X86::DIVPDrr, X86::DIVPDrm, 16 },
528 { X86::DIVPSrr, X86::DIVPSrm, 16 },
529 { X86::DIVSDrr, X86::DIVSDrm, 0 },
530 { X86::DIVSSrr, X86::DIVSSrm, 0 },
531 { X86::FsANDNPDrr, X86::FsANDNPDrm, 16 },
532 { X86::FsANDNPSrr, X86::FsANDNPSrm, 16 },
533 { X86::FsANDPDrr, X86::FsANDPDrm, 16 },
534 { X86::FsANDPSrr, X86::FsANDPSrm, 16 },
535 { X86::FsORPDrr, X86::FsORPDrm, 16 },
536 { X86::FsORPSrr, X86::FsORPSrm, 16 },
537 { X86::FsXORPDrr, X86::FsXORPDrm, 16 },
538 { X86::FsXORPSrr, X86::FsXORPSrm, 16 },
539 { X86::HADDPDrr, X86::HADDPDrm, 16 },
540 { X86::HADDPSrr, X86::HADDPSrm, 16 },
541 { X86::HSUBPDrr, X86::HSUBPDrm, 16 },
542 { X86::HSUBPSrr, X86::HSUBPSrm, 16 },
543 { X86::IMUL16rr, X86::IMUL16rm, 0 },
544 { X86::IMUL32rr, X86::IMUL32rm, 0 },
545 { X86::IMUL64rr, X86::IMUL64rm, 0 },
546 { X86::MAXPDrr, X86::MAXPDrm, 16 },
547 { X86::MAXPDrr_Int, X86::MAXPDrm_Int, 16 },
548 { X86::MAXPSrr, X86::MAXPSrm, 16 },
549 { X86::MAXPSrr_Int, X86::MAXPSrm_Int, 16 },
550 { X86::MAXSDrr, X86::MAXSDrm, 0 },
551 { X86::MAXSDrr_Int, X86::MAXSDrm_Int, 0 },
552 { X86::MAXSSrr, X86::MAXSSrm, 0 },
553 { X86::MAXSSrr_Int, X86::MAXSSrm_Int, 0 },
554 { X86::MINPDrr, X86::MINPDrm, 16 },
555 { X86::MINPDrr_Int, X86::MINPDrm_Int, 16 },
556 { X86::MINPSrr, X86::MINPSrm, 16 },
557 { X86::MINPSrr_Int, X86::MINPSrm_Int, 16 },
558 { X86::MINSDrr, X86::MINSDrm, 0 },
559 { X86::MINSDrr_Int, X86::MINSDrm_Int, 0 },
560 { X86::MINSSrr, X86::MINSSrm, 0 },
561 { X86::MINSSrr_Int, X86::MINSSrm_Int, 0 },
562 { X86::MULPDrr, X86::MULPDrm, 16 },
563 { X86::MULPSrr, X86::MULPSrm, 16 },
564 { X86::MULSDrr, X86::MULSDrm, 0 },
565 { X86::MULSSrr, X86::MULSSrm, 0 },
566 { X86::OR16rr, X86::OR16rm, 0 },
567 { X86::OR32rr, X86::OR32rm, 0 },
568 { X86::OR64rr, X86::OR64rm, 0 },
569 { X86::OR8rr, X86::OR8rm, 0 },
570 { X86::ORPDrr, X86::ORPDrm, 16 },
571 { X86::ORPSrr, X86::ORPSrm, 16 },
572 { X86::PACKSSDWrr, X86::PACKSSDWrm, 16 },
573 { X86::PACKSSWBrr, X86::PACKSSWBrm, 16 },
574 { X86::PACKUSWBrr, X86::PACKUSWBrm, 16 },
575 { X86::PADDBrr, X86::PADDBrm, 16 },
576 { X86::PADDDrr, X86::PADDDrm, 16 },
577 { X86::PADDQrr, X86::PADDQrm, 16 },
578 { X86::PADDSBrr, X86::PADDSBrm, 16 },
579 { X86::PADDSWrr, X86::PADDSWrm, 16 },
580 { X86::PADDWrr, X86::PADDWrm, 16 },
581 { X86::PANDNrr, X86::PANDNrm, 16 },
582 { X86::PANDrr, X86::PANDrm, 16 },
583 { X86::PAVGBrr, X86::PAVGBrm, 16 },
584 { X86::PAVGWrr, X86::PAVGWrm, 16 },
585 { X86::PCMPEQBrr, X86::PCMPEQBrm, 16 },
586 { X86::PCMPEQDrr, X86::PCMPEQDrm, 16 },
587 { X86::PCMPEQWrr, X86::PCMPEQWrm, 16 },
588 { X86::PCMPGTBrr, X86::PCMPGTBrm, 16 },
589 { X86::PCMPGTDrr, X86::PCMPGTDrm, 16 },
590 { X86::PCMPGTWrr, X86::PCMPGTWrm, 16 },
591 { X86::PINSRWrri, X86::PINSRWrmi, 16 },
592 { X86::PMADDWDrr, X86::PMADDWDrm, 16 },
593 { X86::PMAXSWrr, X86::PMAXSWrm, 16 },
594 { X86::PMAXUBrr, X86::PMAXUBrm, 16 },
595 { X86::PMINSWrr, X86::PMINSWrm, 16 },
596 { X86::PMINUBrr, X86::PMINUBrm, 16 },
597 { X86::PMULDQrr, X86::PMULDQrm, 16 },
598 { X86::PMULHUWrr, X86::PMULHUWrm, 16 },
599 { X86::PMULHWrr, X86::PMULHWrm, 16 },
600 { X86::PMULLDrr, X86::PMULLDrm, 16 },
601 { X86::PMULLWrr, X86::PMULLWrm, 16 },
602 { X86::PMULUDQrr, X86::PMULUDQrm, 16 },
603 { X86::PORrr, X86::PORrm, 16 },
604 { X86::PSADBWrr, X86::PSADBWrm, 16 },
605 { X86::PSLLDrr, X86::PSLLDrm, 16 },
606 { X86::PSLLQrr, X86::PSLLQrm, 16 },
607 { X86::PSLLWrr, X86::PSLLWrm, 16 },
608 { X86::PSRADrr, X86::PSRADrm, 16 },
609 { X86::PSRAWrr, X86::PSRAWrm, 16 },
610 { X86::PSRLDrr, X86::PSRLDrm, 16 },
611 { X86::PSRLQrr, X86::PSRLQrm, 16 },
612 { X86::PSRLWrr, X86::PSRLWrm, 16 },
613 { X86::PSUBBrr, X86::PSUBBrm, 16 },
614 { X86::PSUBDrr, X86::PSUBDrm, 16 },
615 { X86::PSUBSBrr, X86::PSUBSBrm, 16 },
616 { X86::PSUBSWrr, X86::PSUBSWrm, 16 },
617 { X86::PSUBWrr, X86::PSUBWrm, 16 },
618 { X86::PUNPCKHBWrr, X86::PUNPCKHBWrm, 16 },
619 { X86::PUNPCKHDQrr, X86::PUNPCKHDQrm, 16 },
620 { X86::PUNPCKHQDQrr, X86::PUNPCKHQDQrm, 16 },
621 { X86::PUNPCKHWDrr, X86::PUNPCKHWDrm, 16 },
622 { X86::PUNPCKLBWrr, X86::PUNPCKLBWrm, 16 },
623 { X86::PUNPCKLDQrr, X86::PUNPCKLDQrm, 16 },
624 { X86::PUNPCKLQDQrr, X86::PUNPCKLQDQrm, 16 },
625 { X86::PUNPCKLWDrr, X86::PUNPCKLWDrm, 16 },
626 { X86::PXORrr, X86::PXORrm, 16 },
627 { X86::SBB32rr, X86::SBB32rm, 0 },
628 { X86::SBB64rr, X86::SBB64rm, 0 },
629 { X86::SHUFPDrri, X86::SHUFPDrmi, 16 },
630 { X86::SHUFPSrri, X86::SHUFPSrmi, 16 },
631 { X86::SUB16rr, X86::SUB16rm, 0 },
632 { X86::SUB32rr, X86::SUB32rm, 0 },
633 { X86::SUB64rr, X86::SUB64rm, 0 },
634 { X86::SUB8rr, X86::SUB8rm, 0 },
635 { X86::SUBPDrr, X86::SUBPDrm, 16 },
636 { X86::SUBPSrr, X86::SUBPSrm, 16 },
637 { X86::SUBSDrr, X86::SUBSDrm, 0 },
638 { X86::SUBSSrr, X86::SUBSSrm, 0 },
639 // FIXME: TEST*rr -> swapped operand of TEST*mr.
640 { X86::UNPCKHPDrr, X86::UNPCKHPDrm, 16 },
641 { X86::UNPCKHPSrr, X86::UNPCKHPSrm, 16 },
642 { X86::UNPCKLPDrr, X86::UNPCKLPDrm, 16 },
643 { X86::UNPCKLPSrr, X86::UNPCKLPSrm, 16 },
644 { X86::XOR16rr, X86::XOR16rm, 0 },
645 { X86::XOR32rr, X86::XOR32rm, 0 },
646 { X86::XOR64rr, X86::XOR64rm, 0 },
647 { X86::XOR8rr, X86::XOR8rm, 0 },
648 { X86::XORPDrr, X86::XORPDrm, 16 },
649 { X86::XORPSrr, X86::XORPSrm, 16 }
652 for (unsigned i = 0, e = array_lengthof(OpTbl2); i != e; ++i) {
653 unsigned RegOp = OpTbl2[i][0];
654 unsigned MemOp = OpTbl2[i][1];
655 unsigned Align = OpTbl2[i][2];
656 if (!RegOp2MemOpTable2.insert(std::make_pair((unsigned*)RegOp,
657 std::make_pair(MemOp,Align))).second)
658 assert(false && "Duplicated entries?");
659 // Index 2, folded load
660 unsigned AuxInfo = 2 | (1 << 4);
661 if (!MemOp2RegOpTable.insert(std::make_pair((unsigned*)MemOp,
662 std::make_pair(RegOp, AuxInfo))).second)
663 AmbEntries.push_back(MemOp);
666 // Remove ambiguous entries.
667 assert(AmbEntries.empty() && "Duplicated entries in unfolding maps?");
671 X86InstrInfo::isCoalescableExtInstr(const MachineInstr &MI,
672 unsigned &SrcReg, unsigned &DstReg,
673 unsigned &SubIdx) const {
674 switch (MI.getOpcode()) {
676 case X86::MOVSX16rr8:
677 case X86::MOVZX16rr8:
678 case X86::MOVSX32rr8:
679 case X86::MOVZX32rr8:
680 case X86::MOVSX64rr8:
681 case X86::MOVZX64rr8:
682 if (!TM.getSubtarget<X86Subtarget>().is64Bit())
683 // It's not always legal to reference the low 8-bit of the larger
684 // register in 32-bit mode.
686 case X86::MOVSX32rr16:
687 case X86::MOVZX32rr16:
688 case X86::MOVSX64rr16:
689 case X86::MOVZX64rr16:
690 case X86::MOVSX64rr32:
691 case X86::MOVZX64rr32: {
692 if (MI.getOperand(0).getSubReg() || MI.getOperand(1).getSubReg())
695 SrcReg = MI.getOperand(1).getReg();
696 DstReg = MI.getOperand(0).getReg();
697 switch (MI.getOpcode()) {
701 case X86::MOVSX16rr8:
702 case X86::MOVZX16rr8:
703 case X86::MOVSX32rr8:
704 case X86::MOVZX32rr8:
705 case X86::MOVSX64rr8:
706 case X86::MOVZX64rr8:
707 SubIdx = X86::sub_8bit;
709 case X86::MOVSX32rr16:
710 case X86::MOVZX32rr16:
711 case X86::MOVSX64rr16:
712 case X86::MOVZX64rr16:
713 SubIdx = X86::sub_16bit;
715 case X86::MOVSX64rr32:
716 case X86::MOVZX64rr32:
717 SubIdx = X86::sub_32bit;
726 /// isFrameOperand - Return true and the FrameIndex if the specified
727 /// operand and follow operands form a reference to the stack frame.
728 bool X86InstrInfo::isFrameOperand(const MachineInstr *MI, unsigned int Op,
729 int &FrameIndex) const {
730 if (MI->getOperand(Op).isFI() && MI->getOperand(Op+1).isImm() &&
731 MI->getOperand(Op+2).isReg() && MI->getOperand(Op+3).isImm() &&
732 MI->getOperand(Op+1).getImm() == 1 &&
733 MI->getOperand(Op+2).getReg() == 0 &&
734 MI->getOperand(Op+3).getImm() == 0) {
735 FrameIndex = MI->getOperand(Op).getIndex();
741 static bool isFrameLoadOpcode(int Opcode) {
747 case X86::MOV32rm_TC:
749 case X86::MOV64rm_TC:
756 case X86::MMX_MOVD64rm:
757 case X86::MMX_MOVQ64rm:
764 static bool isFrameStoreOpcode(int Opcode) {
770 case X86::MOV32mr_TC:
772 case X86::MOV64mr_TC:
779 case X86::MMX_MOVD64mr:
780 case X86::MMX_MOVQ64mr:
781 case X86::MMX_MOVNTQmr:
787 unsigned X86InstrInfo::isLoadFromStackSlot(const MachineInstr *MI,
788 int &FrameIndex) const {
789 if (isFrameLoadOpcode(MI->getOpcode()))
790 if (isFrameOperand(MI, 1, FrameIndex))
791 return MI->getOperand(0).getReg();
795 unsigned X86InstrInfo::isLoadFromStackSlotPostFE(const MachineInstr *MI,
796 int &FrameIndex) const {
797 if (isFrameLoadOpcode(MI->getOpcode())) {
799 if ((Reg = isLoadFromStackSlot(MI, FrameIndex)))
801 // Check for post-frame index elimination operations
802 const MachineMemOperand *Dummy;
803 return hasLoadFromStackSlot(MI, Dummy, FrameIndex);
808 bool X86InstrInfo::hasLoadFromStackSlot(const MachineInstr *MI,
809 const MachineMemOperand *&MMO,
810 int &FrameIndex) const {
811 for (MachineInstr::mmo_iterator o = MI->memoperands_begin(),
812 oe = MI->memoperands_end();
815 if ((*o)->isLoad() && (*o)->getValue())
816 if (const FixedStackPseudoSourceValue *Value =
817 dyn_cast<const FixedStackPseudoSourceValue>((*o)->getValue())) {
818 FrameIndex = Value->getFrameIndex();
826 unsigned X86InstrInfo::isStoreToStackSlot(const MachineInstr *MI,
827 int &FrameIndex) const {
828 if (isFrameStoreOpcode(MI->getOpcode()))
829 if (isFrameOperand(MI, 0, FrameIndex))
830 return MI->getOperand(X86::AddrNumOperands).getReg();
834 unsigned X86InstrInfo::isStoreToStackSlotPostFE(const MachineInstr *MI,
835 int &FrameIndex) const {
836 if (isFrameStoreOpcode(MI->getOpcode())) {
838 if ((Reg = isStoreToStackSlot(MI, FrameIndex)))
840 // Check for post-frame index elimination operations
841 const MachineMemOperand *Dummy;
842 return hasStoreToStackSlot(MI, Dummy, FrameIndex);
847 bool X86InstrInfo::hasStoreToStackSlot(const MachineInstr *MI,
848 const MachineMemOperand *&MMO,
849 int &FrameIndex) const {
850 for (MachineInstr::mmo_iterator o = MI->memoperands_begin(),
851 oe = MI->memoperands_end();
854 if ((*o)->isStore() && (*o)->getValue())
855 if (const FixedStackPseudoSourceValue *Value =
856 dyn_cast<const FixedStackPseudoSourceValue>((*o)->getValue())) {
857 FrameIndex = Value->getFrameIndex();
865 /// regIsPICBase - Return true if register is PIC base (i.e.g defined by
867 static bool regIsPICBase(unsigned BaseReg, const MachineRegisterInfo &MRI) {
868 bool isPICBase = false;
869 for (MachineRegisterInfo::def_iterator I = MRI.def_begin(BaseReg),
870 E = MRI.def_end(); I != E; ++I) {
871 MachineInstr *DefMI = I.getOperand().getParent();
872 if (DefMI->getOpcode() != X86::MOVPC32r)
874 assert(!isPICBase && "More than one PIC base?");
881 X86InstrInfo::isReallyTriviallyReMaterializable(const MachineInstr *MI,
882 AliasAnalysis *AA) const {
883 switch (MI->getOpcode()) {
894 case X86::MOVUPSrm_Int:
897 case X86::MMX_MOVD64rm:
898 case X86::MMX_MOVQ64rm:
899 case X86::FsMOVAPSrm:
900 case X86::FsMOVAPDrm: {
901 // Loads from constant pools are trivially rematerializable.
902 if (MI->getOperand(1).isReg() &&
903 MI->getOperand(2).isImm() &&
904 MI->getOperand(3).isReg() && MI->getOperand(3).getReg() == 0 &&
905 MI->isInvariantLoad(AA)) {
906 unsigned BaseReg = MI->getOperand(1).getReg();
907 if (BaseReg == 0 || BaseReg == X86::RIP)
909 // Allow re-materialization of PIC load.
910 if (!ReMatPICStubLoad && MI->getOperand(4).isGlobal())
912 const MachineFunction &MF = *MI->getParent()->getParent();
913 const MachineRegisterInfo &MRI = MF.getRegInfo();
914 bool isPICBase = false;
915 for (MachineRegisterInfo::def_iterator I = MRI.def_begin(BaseReg),
916 E = MRI.def_end(); I != E; ++I) {
917 MachineInstr *DefMI = I.getOperand().getParent();
918 if (DefMI->getOpcode() != X86::MOVPC32r)
920 assert(!isPICBase && "More than one PIC base?");
930 if (MI->getOperand(2).isImm() &&
931 MI->getOperand(3).isReg() && MI->getOperand(3).getReg() == 0 &&
932 !MI->getOperand(4).isReg()) {
933 // lea fi#, lea GV, etc. are all rematerializable.
934 if (!MI->getOperand(1).isReg())
936 unsigned BaseReg = MI->getOperand(1).getReg();
939 // Allow re-materialization of lea PICBase + x.
940 const MachineFunction &MF = *MI->getParent()->getParent();
941 const MachineRegisterInfo &MRI = MF.getRegInfo();
942 return regIsPICBase(BaseReg, MRI);
948 // All other instructions marked M_REMATERIALIZABLE are always trivially
953 /// isSafeToClobberEFLAGS - Return true if it's safe insert an instruction that
954 /// would clobber the EFLAGS condition register. Note the result may be
955 /// conservative. If it cannot definitely determine the safety after visiting
956 /// a few instructions in each direction it assumes it's not safe.
957 static bool isSafeToClobberEFLAGS(MachineBasicBlock &MBB,
958 MachineBasicBlock::iterator I) {
959 MachineBasicBlock::iterator E = MBB.end();
961 // It's always safe to clobber EFLAGS at the end of a block.
965 // For compile time consideration, if we are not able to determine the
966 // safety after visiting 4 instructions in each direction, we will assume
968 MachineBasicBlock::iterator Iter = I;
969 for (unsigned i = 0; i < 4; ++i) {
970 bool SeenDef = false;
971 for (unsigned j = 0, e = Iter->getNumOperands(); j != e; ++j) {
972 MachineOperand &MO = Iter->getOperand(j);
975 if (MO.getReg() == X86::EFLAGS) {
983 // This instruction defines EFLAGS, no need to look any further.
986 // Skip over DBG_VALUE.
987 while (Iter != E && Iter->isDebugValue())
990 // If we make it to the end of the block, it's safe to clobber EFLAGS.
995 MachineBasicBlock::iterator B = MBB.begin();
997 for (unsigned i = 0; i < 4; ++i) {
998 // If we make it to the beginning of the block, it's safe to clobber
999 // EFLAGS iff EFLAGS is not live-in.
1001 return !MBB.isLiveIn(X86::EFLAGS);
1004 // Skip over DBG_VALUE.
1005 while (Iter != B && Iter->isDebugValue())
1008 bool SawKill = false;
1009 for (unsigned j = 0, e = Iter->getNumOperands(); j != e; ++j) {
1010 MachineOperand &MO = Iter->getOperand(j);
1011 if (MO.isReg() && MO.getReg() == X86::EFLAGS) {
1012 if (MO.isDef()) return MO.isDead();
1013 if (MO.isKill()) SawKill = true;
1018 // This instruction kills EFLAGS and doesn't redefine it, so
1019 // there's no need to look further.
1023 // Conservative answer.
1027 void X86InstrInfo::reMaterialize(MachineBasicBlock &MBB,
1028 MachineBasicBlock::iterator I,
1029 unsigned DestReg, unsigned SubIdx,
1030 const MachineInstr *Orig,
1031 const TargetRegisterInfo &TRI) const {
1032 DebugLoc DL = Orig->getDebugLoc();
1034 // MOV32r0 etc. are implemented with xor which clobbers condition code.
1035 // Re-materialize them as movri instructions to avoid side effects.
1037 unsigned Opc = Orig->getOpcode();
1043 case X86::MOV64r0: {
1044 if (!isSafeToClobberEFLAGS(MBB, I)) {
1047 case X86::MOV8r0: Opc = X86::MOV8ri; break;
1048 case X86::MOV16r0: Opc = X86::MOV16ri; break;
1049 case X86::MOV32r0: Opc = X86::MOV32ri; break;
1050 case X86::MOV64r0: Opc = X86::MOV64ri64i32; break;
1059 MachineInstr *MI = MBB.getParent()->CloneMachineInstr(Orig);
1062 BuildMI(MBB, I, DL, get(Opc)).addOperand(Orig->getOperand(0)).addImm(0);
1065 MachineInstr *NewMI = prior(I);
1066 NewMI->substituteRegister(Orig->getOperand(0).getReg(), DestReg, SubIdx, TRI);
1069 /// hasLiveCondCodeDef - True if MI has a condition code def, e.g. EFLAGS, that
1070 /// is not marked dead.
1071 static bool hasLiveCondCodeDef(MachineInstr *MI) {
1072 for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
1073 MachineOperand &MO = MI->getOperand(i);
1074 if (MO.isReg() && MO.isDef() &&
1075 MO.getReg() == X86::EFLAGS && !MO.isDead()) {
1082 /// convertToThreeAddressWithLEA - Helper for convertToThreeAddress when
1083 /// 16-bit LEA is disabled, use 32-bit LEA to form 3-address code by promoting
1084 /// to a 32-bit superregister and then truncating back down to a 16-bit
1087 X86InstrInfo::convertToThreeAddressWithLEA(unsigned MIOpc,
1088 MachineFunction::iterator &MFI,
1089 MachineBasicBlock::iterator &MBBI,
1090 LiveVariables *LV) const {
1091 MachineInstr *MI = MBBI;
1092 unsigned Dest = MI->getOperand(0).getReg();
1093 unsigned Src = MI->getOperand(1).getReg();
1094 bool isDead = MI->getOperand(0).isDead();
1095 bool isKill = MI->getOperand(1).isKill();
1097 unsigned Opc = TM.getSubtarget<X86Subtarget>().is64Bit()
1098 ? X86::LEA64_32r : X86::LEA32r;
1099 MachineRegisterInfo &RegInfo = MFI->getParent()->getRegInfo();
1100 unsigned leaInReg = RegInfo.createVirtualRegister(&X86::GR32RegClass);
1101 unsigned leaOutReg = RegInfo.createVirtualRegister(&X86::GR32RegClass);
1103 // Build and insert into an implicit UNDEF value. This is OK because
1104 // well be shifting and then extracting the lower 16-bits.
1105 // This has the potential to cause partial register stall. e.g.
1106 // movw (%rbp,%rcx,2), %dx
1107 // leal -65(%rdx), %esi
1108 // But testing has shown this *does* help performance in 64-bit mode (at
1109 // least on modern x86 machines).
1110 BuildMI(*MFI, MBBI, MI->getDebugLoc(), get(X86::IMPLICIT_DEF), leaInReg);
1111 MachineInstr *InsMI =
1112 BuildMI(*MFI, MBBI, MI->getDebugLoc(), get(TargetOpcode::COPY))
1113 .addReg(leaInReg, RegState::Define, X86::sub_16bit)
1114 .addReg(Src, getKillRegState(isKill));
1116 MachineInstrBuilder MIB = BuildMI(*MFI, MBBI, MI->getDebugLoc(),
1117 get(Opc), leaOutReg);
1120 llvm_unreachable(0);
1122 case X86::SHL16ri: {
1123 unsigned ShAmt = MI->getOperand(2).getImm();
1124 MIB.addReg(0).addImm(1 << ShAmt)
1125 .addReg(leaInReg, RegState::Kill).addImm(0).addReg(0);
1129 case X86::INC64_16r:
1130 addRegOffset(MIB, leaInReg, true, 1);
1133 case X86::DEC64_16r:
1134 addRegOffset(MIB, leaInReg, true, -1);
1138 addRegOffset(MIB, leaInReg, true, MI->getOperand(2).getImm());
1140 case X86::ADD16rr: {
1141 unsigned Src2 = MI->getOperand(2).getReg();
1142 bool isKill2 = MI->getOperand(2).isKill();
1143 unsigned leaInReg2 = 0;
1144 MachineInstr *InsMI2 = 0;
1146 // ADD16rr %reg1028<kill>, %reg1028
1147 // just a single insert_subreg.
1148 addRegReg(MIB, leaInReg, true, leaInReg, false);
1150 leaInReg2 = RegInfo.createVirtualRegister(&X86::GR32RegClass);
1151 // Build and insert into an implicit UNDEF value. This is OK because
1152 // well be shifting and then extracting the lower 16-bits.
1153 BuildMI(*MFI, MIB, MI->getDebugLoc(), get(X86::IMPLICIT_DEF), leaInReg2);
1155 BuildMI(*MFI, MIB, MI->getDebugLoc(), get(TargetOpcode::COPY))
1156 .addReg(leaInReg2, RegState::Define, X86::sub_16bit)
1157 .addReg(Src2, getKillRegState(isKill2));
1158 addRegReg(MIB, leaInReg, true, leaInReg2, true);
1160 if (LV && isKill2 && InsMI2)
1161 LV->replaceKillInstruction(Src2, MI, InsMI2);
1166 MachineInstr *NewMI = MIB;
1167 MachineInstr *ExtMI =
1168 BuildMI(*MFI, MBBI, MI->getDebugLoc(), get(TargetOpcode::COPY))
1169 .addReg(Dest, RegState::Define | getDeadRegState(isDead))
1170 .addReg(leaOutReg, RegState::Kill, X86::sub_16bit);
1173 // Update live variables
1174 LV->getVarInfo(leaInReg).Kills.push_back(NewMI);
1175 LV->getVarInfo(leaOutReg).Kills.push_back(ExtMI);
1177 LV->replaceKillInstruction(Src, MI, InsMI);
1179 LV->replaceKillInstruction(Dest, MI, ExtMI);
1185 /// convertToThreeAddress - This method must be implemented by targets that
1186 /// set the M_CONVERTIBLE_TO_3_ADDR flag. When this flag is set, the target
1187 /// may be able to convert a two-address instruction into a true
1188 /// three-address instruction on demand. This allows the X86 target (for
1189 /// example) to convert ADD and SHL instructions into LEA instructions if they
1190 /// would require register copies due to two-addressness.
1192 /// This method returns a null pointer if the transformation cannot be
1193 /// performed, otherwise it returns the new instruction.
1196 X86InstrInfo::convertToThreeAddress(MachineFunction::iterator &MFI,
1197 MachineBasicBlock::iterator &MBBI,
1198 LiveVariables *LV) const {
1199 MachineInstr *MI = MBBI;
1200 MachineFunction &MF = *MI->getParent()->getParent();
1201 // All instructions input are two-addr instructions. Get the known operands.
1202 unsigned Dest = MI->getOperand(0).getReg();
1203 unsigned Src = MI->getOperand(1).getReg();
1204 bool isDead = MI->getOperand(0).isDead();
1205 bool isKill = MI->getOperand(1).isKill();
1207 MachineInstr *NewMI = NULL;
1208 // FIXME: 16-bit LEA's are really slow on Athlons, but not bad on P4's. When
1209 // we have better subtarget support, enable the 16-bit LEA generation here.
1210 // 16-bit LEA is also slow on Core2.
1211 bool DisableLEA16 = true;
1212 bool is64Bit = TM.getSubtarget<X86Subtarget>().is64Bit();
1214 unsigned MIOpc = MI->getOpcode();
1216 case X86::SHUFPSrri: {
1217 assert(MI->getNumOperands() == 4 && "Unknown shufps instruction!");
1218 if (!TM.getSubtarget<X86Subtarget>().hasSSE2()) return 0;
1220 unsigned B = MI->getOperand(1).getReg();
1221 unsigned C = MI->getOperand(2).getReg();
1222 if (B != C) return 0;
1223 unsigned A = MI->getOperand(0).getReg();
1224 unsigned M = MI->getOperand(3).getImm();
1225 NewMI = BuildMI(MF, MI->getDebugLoc(), get(X86::PSHUFDri))
1226 .addReg(A, RegState::Define | getDeadRegState(isDead))
1227 .addReg(B, getKillRegState(isKill)).addImm(M);
1230 case X86::SHL64ri: {
1231 assert(MI->getNumOperands() >= 3 && "Unknown shift instruction!");
1232 // NOTE: LEA doesn't produce flags like shift does, but LLVM never uses
1233 // the flags produced by a shift yet, so this is safe.
1234 unsigned ShAmt = MI->getOperand(2).getImm();
1235 if (ShAmt == 0 || ShAmt >= 4) return 0;
1237 NewMI = BuildMI(MF, MI->getDebugLoc(), get(X86::LEA64r))
1238 .addReg(Dest, RegState::Define | getDeadRegState(isDead))
1239 .addReg(0).addImm(1 << ShAmt)
1240 .addReg(Src, getKillRegState(isKill))
1241 .addImm(0).addReg(0);
1244 case X86::SHL32ri: {
1245 assert(MI->getNumOperands() >= 3 && "Unknown shift instruction!");
1246 // NOTE: LEA doesn't produce flags like shift does, but LLVM never uses
1247 // the flags produced by a shift yet, so this is safe.
1248 unsigned ShAmt = MI->getOperand(2).getImm();
1249 if (ShAmt == 0 || ShAmt >= 4) return 0;
1251 unsigned Opc = is64Bit ? X86::LEA64_32r : X86::LEA32r;
1252 NewMI = BuildMI(MF, MI->getDebugLoc(), get(Opc))
1253 .addReg(Dest, RegState::Define | getDeadRegState(isDead))
1254 .addReg(0).addImm(1 << ShAmt)
1255 .addReg(Src, getKillRegState(isKill)).addImm(0).addReg(0);
1258 case X86::SHL16ri: {
1259 assert(MI->getNumOperands() >= 3 && "Unknown shift instruction!");
1260 // NOTE: LEA doesn't produce flags like shift does, but LLVM never uses
1261 // the flags produced by a shift yet, so this is safe.
1262 unsigned ShAmt = MI->getOperand(2).getImm();
1263 if (ShAmt == 0 || ShAmt >= 4) return 0;
1266 return is64Bit ? convertToThreeAddressWithLEA(MIOpc, MFI, MBBI, LV) : 0;
1267 NewMI = BuildMI(MF, MI->getDebugLoc(), get(X86::LEA16r))
1268 .addReg(Dest, RegState::Define | getDeadRegState(isDead))
1269 .addReg(0).addImm(1 << ShAmt)
1270 .addReg(Src, getKillRegState(isKill))
1271 .addImm(0).addReg(0);
1275 // The following opcodes also sets the condition code register(s). Only
1276 // convert them to equivalent lea if the condition code register def's
1278 if (hasLiveCondCodeDef(MI))
1285 case X86::INC64_32r: {
1286 assert(MI->getNumOperands() >= 2 && "Unknown inc instruction!");
1287 unsigned Opc = MIOpc == X86::INC64r ? X86::LEA64r
1288 : (is64Bit ? X86::LEA64_32r : X86::LEA32r);
1289 NewMI = addRegOffset(BuildMI(MF, MI->getDebugLoc(), get(Opc))
1290 .addReg(Dest, RegState::Define |
1291 getDeadRegState(isDead)),
1296 case X86::INC64_16r:
1298 return is64Bit ? convertToThreeAddressWithLEA(MIOpc, MFI, MBBI, LV) : 0;
1299 assert(MI->getNumOperands() >= 2 && "Unknown inc instruction!");
1300 NewMI = addRegOffset(BuildMI(MF, MI->getDebugLoc(), get(X86::LEA16r))
1301 .addReg(Dest, RegState::Define |
1302 getDeadRegState(isDead)),
1307 case X86::DEC64_32r: {
1308 assert(MI->getNumOperands() >= 2 && "Unknown dec instruction!");
1309 unsigned Opc = MIOpc == X86::DEC64r ? X86::LEA64r
1310 : (is64Bit ? X86::LEA64_32r : X86::LEA32r);
1311 NewMI = addRegOffset(BuildMI(MF, MI->getDebugLoc(), get(Opc))
1312 .addReg(Dest, RegState::Define |
1313 getDeadRegState(isDead)),
1318 case X86::DEC64_16r:
1320 return is64Bit ? convertToThreeAddressWithLEA(MIOpc, MFI, MBBI, LV) : 0;
1321 assert(MI->getNumOperands() >= 2 && "Unknown dec instruction!");
1322 NewMI = addRegOffset(BuildMI(MF, MI->getDebugLoc(), get(X86::LEA16r))
1323 .addReg(Dest, RegState::Define |
1324 getDeadRegState(isDead)),
1328 case X86::ADD32rr: {
1329 assert(MI->getNumOperands() >= 3 && "Unknown add instruction!");
1330 unsigned Opc = MIOpc == X86::ADD64rr ? X86::LEA64r
1331 : (is64Bit ? X86::LEA64_32r : X86::LEA32r);
1332 unsigned Src2 = MI->getOperand(2).getReg();
1333 bool isKill2 = MI->getOperand(2).isKill();
1334 NewMI = addRegReg(BuildMI(MF, MI->getDebugLoc(), get(Opc))
1335 .addReg(Dest, RegState::Define |
1336 getDeadRegState(isDead)),
1337 Src, isKill, Src2, isKill2);
1339 LV->replaceKillInstruction(Src2, MI, NewMI);
1342 case X86::ADD16rr: {
1344 return is64Bit ? convertToThreeAddressWithLEA(MIOpc, MFI, MBBI, LV) : 0;
1345 assert(MI->getNumOperands() >= 3 && "Unknown add instruction!");
1346 unsigned Src2 = MI->getOperand(2).getReg();
1347 bool isKill2 = MI->getOperand(2).isKill();
1348 NewMI = addRegReg(BuildMI(MF, MI->getDebugLoc(), get(X86::LEA16r))
1349 .addReg(Dest, RegState::Define |
1350 getDeadRegState(isDead)),
1351 Src, isKill, Src2, isKill2);
1353 LV->replaceKillInstruction(Src2, MI, NewMI);
1356 case X86::ADD64ri32:
1358 assert(MI->getNumOperands() >= 3 && "Unknown add instruction!");
1359 NewMI = addRegOffset(BuildMI(MF, MI->getDebugLoc(), get(X86::LEA64r))
1360 .addReg(Dest, RegState::Define |
1361 getDeadRegState(isDead)),
1362 Src, isKill, MI->getOperand(2).getImm());
1365 case X86::ADD32ri8: {
1366 assert(MI->getNumOperands() >= 3 && "Unknown add instruction!");
1367 unsigned Opc = is64Bit ? X86::LEA64_32r : X86::LEA32r;
1368 NewMI = addRegOffset(BuildMI(MF, MI->getDebugLoc(), get(Opc))
1369 .addReg(Dest, RegState::Define |
1370 getDeadRegState(isDead)),
1371 Src, isKill, MI->getOperand(2).getImm());
1377 return is64Bit ? convertToThreeAddressWithLEA(MIOpc, MFI, MBBI, LV) : 0;
1378 assert(MI->getNumOperands() >= 3 && "Unknown add instruction!");
1379 NewMI = addRegOffset(BuildMI(MF, MI->getDebugLoc(), get(X86::LEA16r))
1380 .addReg(Dest, RegState::Define |
1381 getDeadRegState(isDead)),
1382 Src, isKill, MI->getOperand(2).getImm());
1388 if (!NewMI) return 0;
1390 if (LV) { // Update live variables
1392 LV->replaceKillInstruction(Src, MI, NewMI);
1394 LV->replaceKillInstruction(Dest, MI, NewMI);
1397 MFI->insert(MBBI, NewMI); // Insert the new inst
1401 /// commuteInstruction - We have a few instructions that must be hacked on to
1405 X86InstrInfo::commuteInstruction(MachineInstr *MI, bool NewMI) const {
1406 switch (MI->getOpcode()) {
1407 case X86::SHRD16rri8: // A = SHRD16rri8 B, C, I -> A = SHLD16rri8 C, B, (16-I)
1408 case X86::SHLD16rri8: // A = SHLD16rri8 B, C, I -> A = SHRD16rri8 C, B, (16-I)
1409 case X86::SHRD32rri8: // A = SHRD32rri8 B, C, I -> A = SHLD32rri8 C, B, (32-I)
1410 case X86::SHLD32rri8: // A = SHLD32rri8 B, C, I -> A = SHRD32rri8 C, B, (32-I)
1411 case X86::SHRD64rri8: // A = SHRD64rri8 B, C, I -> A = SHLD64rri8 C, B, (64-I)
1412 case X86::SHLD64rri8:{// A = SHLD64rri8 B, C, I -> A = SHRD64rri8 C, B, (64-I)
1415 switch (MI->getOpcode()) {
1416 default: llvm_unreachable("Unreachable!");
1417 case X86::SHRD16rri8: Size = 16; Opc = X86::SHLD16rri8; break;
1418 case X86::SHLD16rri8: Size = 16; Opc = X86::SHRD16rri8; break;
1419 case X86::SHRD32rri8: Size = 32; Opc = X86::SHLD32rri8; break;
1420 case X86::SHLD32rri8: Size = 32; Opc = X86::SHRD32rri8; break;
1421 case X86::SHRD64rri8: Size = 64; Opc = X86::SHLD64rri8; break;
1422 case X86::SHLD64rri8: Size = 64; Opc = X86::SHRD64rri8; break;
1424 unsigned Amt = MI->getOperand(3).getImm();
1426 MachineFunction &MF = *MI->getParent()->getParent();
1427 MI = MF.CloneMachineInstr(MI);
1430 MI->setDesc(get(Opc));
1431 MI->getOperand(3).setImm(Size-Amt);
1432 return TargetInstrInfoImpl::commuteInstruction(MI, NewMI);
1434 case X86::CMOVB16rr:
1435 case X86::CMOVB32rr:
1436 case X86::CMOVB64rr:
1437 case X86::CMOVAE16rr:
1438 case X86::CMOVAE32rr:
1439 case X86::CMOVAE64rr:
1440 case X86::CMOVE16rr:
1441 case X86::CMOVE32rr:
1442 case X86::CMOVE64rr:
1443 case X86::CMOVNE16rr:
1444 case X86::CMOVNE32rr:
1445 case X86::CMOVNE64rr:
1446 case X86::CMOVBE16rr:
1447 case X86::CMOVBE32rr:
1448 case X86::CMOVBE64rr:
1449 case X86::CMOVA16rr:
1450 case X86::CMOVA32rr:
1451 case X86::CMOVA64rr:
1452 case X86::CMOVL16rr:
1453 case X86::CMOVL32rr:
1454 case X86::CMOVL64rr:
1455 case X86::CMOVGE16rr:
1456 case X86::CMOVGE32rr:
1457 case X86::CMOVGE64rr:
1458 case X86::CMOVLE16rr:
1459 case X86::CMOVLE32rr:
1460 case X86::CMOVLE64rr:
1461 case X86::CMOVG16rr:
1462 case X86::CMOVG32rr:
1463 case X86::CMOVG64rr:
1464 case X86::CMOVS16rr:
1465 case X86::CMOVS32rr:
1466 case X86::CMOVS64rr:
1467 case X86::CMOVNS16rr:
1468 case X86::CMOVNS32rr:
1469 case X86::CMOVNS64rr:
1470 case X86::CMOVP16rr:
1471 case X86::CMOVP32rr:
1472 case X86::CMOVP64rr:
1473 case X86::CMOVNP16rr:
1474 case X86::CMOVNP32rr:
1475 case X86::CMOVNP64rr:
1476 case X86::CMOVO16rr:
1477 case X86::CMOVO32rr:
1478 case X86::CMOVO64rr:
1479 case X86::CMOVNO16rr:
1480 case X86::CMOVNO32rr:
1481 case X86::CMOVNO64rr: {
1483 switch (MI->getOpcode()) {
1485 case X86::CMOVB16rr: Opc = X86::CMOVAE16rr; break;
1486 case X86::CMOVB32rr: Opc = X86::CMOVAE32rr; break;
1487 case X86::CMOVB64rr: Opc = X86::CMOVAE64rr; break;
1488 case X86::CMOVAE16rr: Opc = X86::CMOVB16rr; break;
1489 case X86::CMOVAE32rr: Opc = X86::CMOVB32rr; break;
1490 case X86::CMOVAE64rr: Opc = X86::CMOVB64rr; break;
1491 case X86::CMOVE16rr: Opc = X86::CMOVNE16rr; break;
1492 case X86::CMOVE32rr: Opc = X86::CMOVNE32rr; break;
1493 case X86::CMOVE64rr: Opc = X86::CMOVNE64rr; break;
1494 case X86::CMOVNE16rr: Opc = X86::CMOVE16rr; break;
1495 case X86::CMOVNE32rr: Opc = X86::CMOVE32rr; break;
1496 case X86::CMOVNE64rr: Opc = X86::CMOVE64rr; break;
1497 case X86::CMOVBE16rr: Opc = X86::CMOVA16rr; break;
1498 case X86::CMOVBE32rr: Opc = X86::CMOVA32rr; break;
1499 case X86::CMOVBE64rr: Opc = X86::CMOVA64rr; break;
1500 case X86::CMOVA16rr: Opc = X86::CMOVBE16rr; break;
1501 case X86::CMOVA32rr: Opc = X86::CMOVBE32rr; break;
1502 case X86::CMOVA64rr: Opc = X86::CMOVBE64rr; break;
1503 case X86::CMOVL16rr: Opc = X86::CMOVGE16rr; break;
1504 case X86::CMOVL32rr: Opc = X86::CMOVGE32rr; break;
1505 case X86::CMOVL64rr: Opc = X86::CMOVGE64rr; break;
1506 case X86::CMOVGE16rr: Opc = X86::CMOVL16rr; break;
1507 case X86::CMOVGE32rr: Opc = X86::CMOVL32rr; break;
1508 case X86::CMOVGE64rr: Opc = X86::CMOVL64rr; break;
1509 case X86::CMOVLE16rr: Opc = X86::CMOVG16rr; break;
1510 case X86::CMOVLE32rr: Opc = X86::CMOVG32rr; break;
1511 case X86::CMOVLE64rr: Opc = X86::CMOVG64rr; break;
1512 case X86::CMOVG16rr: Opc = X86::CMOVLE16rr; break;
1513 case X86::CMOVG32rr: Opc = X86::CMOVLE32rr; break;
1514 case X86::CMOVG64rr: Opc = X86::CMOVLE64rr; break;
1515 case X86::CMOVS16rr: Opc = X86::CMOVNS16rr; break;
1516 case X86::CMOVS32rr: Opc = X86::CMOVNS32rr; break;
1517 case X86::CMOVS64rr: Opc = X86::CMOVNS64rr; break;
1518 case X86::CMOVNS16rr: Opc = X86::CMOVS16rr; break;
1519 case X86::CMOVNS32rr: Opc = X86::CMOVS32rr; break;
1520 case X86::CMOVNS64rr: Opc = X86::CMOVS64rr; break;
1521 case X86::CMOVP16rr: Opc = X86::CMOVNP16rr; break;
1522 case X86::CMOVP32rr: Opc = X86::CMOVNP32rr; break;
1523 case X86::CMOVP64rr: Opc = X86::CMOVNP64rr; break;
1524 case X86::CMOVNP16rr: Opc = X86::CMOVP16rr; break;
1525 case X86::CMOVNP32rr: Opc = X86::CMOVP32rr; break;
1526 case X86::CMOVNP64rr: Opc = X86::CMOVP64rr; break;
1527 case X86::CMOVO16rr: Opc = X86::CMOVNO16rr; break;
1528 case X86::CMOVO32rr: Opc = X86::CMOVNO32rr; break;
1529 case X86::CMOVO64rr: Opc = X86::CMOVNO64rr; break;
1530 case X86::CMOVNO16rr: Opc = X86::CMOVO16rr; break;
1531 case X86::CMOVNO32rr: Opc = X86::CMOVO32rr; break;
1532 case X86::CMOVNO64rr: Opc = X86::CMOVO64rr; break;
1535 MachineFunction &MF = *MI->getParent()->getParent();
1536 MI = MF.CloneMachineInstr(MI);
1539 MI->setDesc(get(Opc));
1540 // Fallthrough intended.
1543 return TargetInstrInfoImpl::commuteInstruction(MI, NewMI);
1547 static X86::CondCode GetCondFromBranchOpc(unsigned BrOpc) {
1549 default: return X86::COND_INVALID;
1550 case X86::JE_4: return X86::COND_E;
1551 case X86::JNE_4: return X86::COND_NE;
1552 case X86::JL_4: return X86::COND_L;
1553 case X86::JLE_4: return X86::COND_LE;
1554 case X86::JG_4: return X86::COND_G;
1555 case X86::JGE_4: return X86::COND_GE;
1556 case X86::JB_4: return X86::COND_B;
1557 case X86::JBE_4: return X86::COND_BE;
1558 case X86::JA_4: return X86::COND_A;
1559 case X86::JAE_4: return X86::COND_AE;
1560 case X86::JS_4: return X86::COND_S;
1561 case X86::JNS_4: return X86::COND_NS;
1562 case X86::JP_4: return X86::COND_P;
1563 case X86::JNP_4: return X86::COND_NP;
1564 case X86::JO_4: return X86::COND_O;
1565 case X86::JNO_4: return X86::COND_NO;
1569 unsigned X86::GetCondBranchFromCond(X86::CondCode CC) {
1571 default: llvm_unreachable("Illegal condition code!");
1572 case X86::COND_E: return X86::JE_4;
1573 case X86::COND_NE: return X86::JNE_4;
1574 case X86::COND_L: return X86::JL_4;
1575 case X86::COND_LE: return X86::JLE_4;
1576 case X86::COND_G: return X86::JG_4;
1577 case X86::COND_GE: return X86::JGE_4;
1578 case X86::COND_B: return X86::JB_4;
1579 case X86::COND_BE: return X86::JBE_4;
1580 case X86::COND_A: return X86::JA_4;
1581 case X86::COND_AE: return X86::JAE_4;
1582 case X86::COND_S: return X86::JS_4;
1583 case X86::COND_NS: return X86::JNS_4;
1584 case X86::COND_P: return X86::JP_4;
1585 case X86::COND_NP: return X86::JNP_4;
1586 case X86::COND_O: return X86::JO_4;
1587 case X86::COND_NO: return X86::JNO_4;
1591 /// GetOppositeBranchCondition - Return the inverse of the specified condition,
1592 /// e.g. turning COND_E to COND_NE.
1593 X86::CondCode X86::GetOppositeBranchCondition(X86::CondCode CC) {
1595 default: llvm_unreachable("Illegal condition code!");
1596 case X86::COND_E: return X86::COND_NE;
1597 case X86::COND_NE: return X86::COND_E;
1598 case X86::COND_L: return X86::COND_GE;
1599 case X86::COND_LE: return X86::COND_G;
1600 case X86::COND_G: return X86::COND_LE;
1601 case X86::COND_GE: return X86::COND_L;
1602 case X86::COND_B: return X86::COND_AE;
1603 case X86::COND_BE: return X86::COND_A;
1604 case X86::COND_A: return X86::COND_BE;
1605 case X86::COND_AE: return X86::COND_B;
1606 case X86::COND_S: return X86::COND_NS;
1607 case X86::COND_NS: return X86::COND_S;
1608 case X86::COND_P: return X86::COND_NP;
1609 case X86::COND_NP: return X86::COND_P;
1610 case X86::COND_O: return X86::COND_NO;
1611 case X86::COND_NO: return X86::COND_O;
1615 bool X86InstrInfo::isUnpredicatedTerminator(const MachineInstr *MI) const {
1616 const TargetInstrDesc &TID = MI->getDesc();
1617 if (!TID.isTerminator()) return false;
1619 // Conditional branch is a special case.
1620 if (TID.isBranch() && !TID.isBarrier())
1622 if (!TID.isPredicable())
1624 return !isPredicated(MI);
1627 bool X86InstrInfo::AnalyzeBranch(MachineBasicBlock &MBB,
1628 MachineBasicBlock *&TBB,
1629 MachineBasicBlock *&FBB,
1630 SmallVectorImpl<MachineOperand> &Cond,
1631 bool AllowModify) const {
1632 // Start from the bottom of the block and work up, examining the
1633 // terminator instructions.
1634 MachineBasicBlock::iterator I = MBB.end();
1635 MachineBasicBlock::iterator UnCondBrIter = MBB.end();
1636 while (I != MBB.begin()) {
1638 if (I->isDebugValue())
1641 // Working from the bottom, when we see a non-terminator instruction, we're
1643 if (!isUnpredicatedTerminator(I))
1646 // A terminator that isn't a branch can't easily be handled by this
1648 if (!I->getDesc().isBranch())
1651 // Handle unconditional branches.
1652 if (I->getOpcode() == X86::JMP_4) {
1656 TBB = I->getOperand(0).getMBB();
1660 // If the block has any instructions after a JMP, delete them.
1661 while (llvm::next(I) != MBB.end())
1662 llvm::next(I)->eraseFromParent();
1667 // Delete the JMP if it's equivalent to a fall-through.
1668 if (MBB.isLayoutSuccessor(I->getOperand(0).getMBB())) {
1670 I->eraseFromParent();
1672 UnCondBrIter = MBB.end();
1676 // TBB is used to indicate the unconditional destination.
1677 TBB = I->getOperand(0).getMBB();
1681 // Handle conditional branches.
1682 X86::CondCode BranchCode = GetCondFromBranchOpc(I->getOpcode());
1683 if (BranchCode == X86::COND_INVALID)
1684 return true; // Can't handle indirect branch.
1686 // Working from the bottom, handle the first conditional branch.
1688 MachineBasicBlock *TargetBB = I->getOperand(0).getMBB();
1689 if (AllowModify && UnCondBrIter != MBB.end() &&
1690 MBB.isLayoutSuccessor(TargetBB)) {
1691 // If we can modify the code and it ends in something like:
1699 // Then we can change this to:
1706 // Which is a bit more efficient.
1707 // We conditionally jump to the fall-through block.
1708 BranchCode = GetOppositeBranchCondition(BranchCode);
1709 unsigned JNCC = GetCondBranchFromCond(BranchCode);
1710 MachineBasicBlock::iterator OldInst = I;
1712 BuildMI(MBB, UnCondBrIter, MBB.findDebugLoc(I), get(JNCC))
1713 .addMBB(UnCondBrIter->getOperand(0).getMBB());
1714 BuildMI(MBB, UnCondBrIter, MBB.findDebugLoc(I), get(X86::JMP_4))
1716 MBB.addSuccessor(TargetBB);
1718 OldInst->eraseFromParent();
1719 UnCondBrIter->eraseFromParent();
1721 // Restart the analysis.
1722 UnCondBrIter = MBB.end();
1728 TBB = I->getOperand(0).getMBB();
1729 Cond.push_back(MachineOperand::CreateImm(BranchCode));
1733 // Handle subsequent conditional branches. Only handle the case where all
1734 // conditional branches branch to the same destination and their condition
1735 // opcodes fit one of the special multi-branch idioms.
1736 assert(Cond.size() == 1);
1739 // Only handle the case where all conditional branches branch to the same
1741 if (TBB != I->getOperand(0).getMBB())
1744 // If the conditions are the same, we can leave them alone.
1745 X86::CondCode OldBranchCode = (X86::CondCode)Cond[0].getImm();
1746 if (OldBranchCode == BranchCode)
1749 // If they differ, see if they fit one of the known patterns. Theoretically,
1750 // we could handle more patterns here, but we shouldn't expect to see them
1751 // if instruction selection has done a reasonable job.
1752 if ((OldBranchCode == X86::COND_NP &&
1753 BranchCode == X86::COND_E) ||
1754 (OldBranchCode == X86::COND_E &&
1755 BranchCode == X86::COND_NP))
1756 BranchCode = X86::COND_NP_OR_E;
1757 else if ((OldBranchCode == X86::COND_P &&
1758 BranchCode == X86::COND_NE) ||
1759 (OldBranchCode == X86::COND_NE &&
1760 BranchCode == X86::COND_P))
1761 BranchCode = X86::COND_NE_OR_P;
1765 // Update the MachineOperand.
1766 Cond[0].setImm(BranchCode);
1772 unsigned X86InstrInfo::RemoveBranch(MachineBasicBlock &MBB) const {
1773 MachineBasicBlock::iterator I = MBB.end();
1776 while (I != MBB.begin()) {
1778 if (I->isDebugValue())
1780 if (I->getOpcode() != X86::JMP_4 &&
1781 GetCondFromBranchOpc(I->getOpcode()) == X86::COND_INVALID)
1783 // Remove the branch.
1784 I->eraseFromParent();
1793 X86InstrInfo::InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
1794 MachineBasicBlock *FBB,
1795 const SmallVectorImpl<MachineOperand> &Cond,
1796 DebugLoc DL) const {
1797 // Shouldn't be a fall through.
1798 assert(TBB && "InsertBranch must not be told to insert a fallthrough");
1799 assert((Cond.size() == 1 || Cond.size() == 0) &&
1800 "X86 branch conditions have one component!");
1803 // Unconditional branch?
1804 assert(!FBB && "Unconditional branch with multiple successors!");
1805 BuildMI(&MBB, DL, get(X86::JMP_4)).addMBB(TBB);
1809 // Conditional branch.
1811 X86::CondCode CC = (X86::CondCode)Cond[0].getImm();
1813 case X86::COND_NP_OR_E:
1814 // Synthesize NP_OR_E with two branches.
1815 BuildMI(&MBB, DL, get(X86::JNP_4)).addMBB(TBB);
1817 BuildMI(&MBB, DL, get(X86::JE_4)).addMBB(TBB);
1820 case X86::COND_NE_OR_P:
1821 // Synthesize NE_OR_P with two branches.
1822 BuildMI(&MBB, DL, get(X86::JNE_4)).addMBB(TBB);
1824 BuildMI(&MBB, DL, get(X86::JP_4)).addMBB(TBB);
1828 unsigned Opc = GetCondBranchFromCond(CC);
1829 BuildMI(&MBB, DL, get(Opc)).addMBB(TBB);
1834 // Two-way Conditional branch. Insert the second branch.
1835 BuildMI(&MBB, DL, get(X86::JMP_4)).addMBB(FBB);
1841 /// isHReg - Test if the given register is a physical h register.
1842 static bool isHReg(unsigned Reg) {
1843 return X86::GR8_ABCD_HRegClass.contains(Reg);
1846 void X86InstrInfo::copyPhysReg(MachineBasicBlock &MBB,
1847 MachineBasicBlock::iterator MI, DebugLoc DL,
1848 unsigned DestReg, unsigned SrcReg,
1849 bool KillSrc) const {
1850 // First deal with the normal symmetric copies.
1852 if (X86::GR64RegClass.contains(DestReg, SrcReg))
1854 else if (X86::GR32RegClass.contains(DestReg, SrcReg))
1856 else if (X86::GR16RegClass.contains(DestReg, SrcReg))
1858 else if (X86::GR8RegClass.contains(DestReg, SrcReg)) {
1859 // Copying to or from a physical H register on x86-64 requires a NOREX
1860 // move. Otherwise use a normal move.
1861 if ((isHReg(DestReg) || isHReg(SrcReg)) &&
1862 TM.getSubtarget<X86Subtarget>().is64Bit())
1863 Opc = X86::MOV8rr_NOREX;
1866 } else if (X86::VR128RegClass.contains(DestReg, SrcReg))
1867 Opc = X86::MOVAPSrr;
1868 else if (X86::VR64RegClass.contains(DestReg, SrcReg))
1869 Opc = X86::MMX_MOVQ64rr;
1872 BuildMI(MBB, MI, DL, get(Opc), DestReg)
1873 .addReg(SrcReg, getKillRegState(KillSrc));
1877 // Moving EFLAGS to / from another register requires a push and a pop.
1878 if (SrcReg == X86::EFLAGS) {
1879 if (X86::GR64RegClass.contains(DestReg)) {
1880 BuildMI(MBB, MI, DL, get(X86::PUSHF64));
1881 BuildMI(MBB, MI, DL, get(X86::POP64r), DestReg);
1883 } else if (X86::GR32RegClass.contains(DestReg)) {
1884 BuildMI(MBB, MI, DL, get(X86::PUSHF32));
1885 BuildMI(MBB, MI, DL, get(X86::POP32r), DestReg);
1889 if (DestReg == X86::EFLAGS) {
1890 if (X86::GR64RegClass.contains(SrcReg)) {
1891 BuildMI(MBB, MI, DL, get(X86::PUSH64r))
1892 .addReg(SrcReg, getKillRegState(KillSrc));
1893 BuildMI(MBB, MI, DL, get(X86::POPF64));
1895 } else if (X86::GR32RegClass.contains(SrcReg)) {
1896 BuildMI(MBB, MI, DL, get(X86::PUSH32r))
1897 .addReg(SrcReg, getKillRegState(KillSrc));
1898 BuildMI(MBB, MI, DL, get(X86::POPF32));
1903 DEBUG(dbgs() << "Cannot copy " << RI.getName(SrcReg)
1904 << " to " << RI.getName(DestReg) << '\n');
1905 llvm_unreachable("Cannot emit physreg copy instruction");
1908 static unsigned getLoadStoreRegOpcode(unsigned Reg,
1909 const TargetRegisterClass *RC,
1910 bool isStackAligned,
1911 const TargetMachine &TM,
1913 switch (RC->getID()) {
1915 llvm_unreachable("Unknown regclass");
1916 case X86::GR64RegClassID:
1917 case X86::GR64_NOSPRegClassID:
1918 return load ? X86::MOV64rm : X86::MOV64mr;
1919 case X86::GR32RegClassID:
1920 case X86::GR32_NOSPRegClassID:
1921 case X86::GR32_ADRegClassID:
1922 return load ? X86::MOV32rm : X86::MOV32mr;
1923 case X86::GR16RegClassID:
1924 return load ? X86::MOV16rm : X86::MOV16mr;
1925 case X86::GR8RegClassID:
1926 // Copying to or from a physical H register on x86-64 requires a NOREX
1927 // move. Otherwise use a normal move.
1929 TM.getSubtarget<X86Subtarget>().is64Bit())
1930 return load ? X86::MOV8rm_NOREX : X86::MOV8mr_NOREX;
1932 return load ? X86::MOV8rm : X86::MOV8mr;
1933 case X86::GR64_ABCDRegClassID:
1934 return load ? X86::MOV64rm : X86::MOV64mr;
1935 case X86::GR32_ABCDRegClassID:
1936 return load ? X86::MOV32rm : X86::MOV32mr;
1937 case X86::GR16_ABCDRegClassID:
1938 return load ? X86::MOV16rm : X86::MOV16mr;
1939 case X86::GR8_ABCD_LRegClassID:
1940 return load ? X86::MOV8rm :X86::MOV8mr;
1941 case X86::GR8_ABCD_HRegClassID:
1942 if (TM.getSubtarget<X86Subtarget>().is64Bit())
1943 return load ? X86::MOV8rm_NOREX : X86::MOV8mr_NOREX;
1945 return load ? X86::MOV8rm : X86::MOV8mr;
1946 case X86::GR64_NOREXRegClassID:
1947 case X86::GR64_NOREX_NOSPRegClassID:
1948 return load ? X86::MOV64rm : X86::MOV64mr;
1949 case X86::GR32_NOREXRegClassID:
1950 return load ? X86::MOV32rm : X86::MOV32mr;
1951 case X86::GR16_NOREXRegClassID:
1952 return load ? X86::MOV16rm : X86::MOV16mr;
1953 case X86::GR8_NOREXRegClassID:
1954 return load ? X86::MOV8rm : X86::MOV8mr;
1955 case X86::GR64_TCRegClassID:
1956 return load ? X86::MOV64rm_TC : X86::MOV64mr_TC;
1957 case X86::GR32_TCRegClassID:
1958 return load ? X86::MOV32rm_TC : X86::MOV32mr_TC;
1959 case X86::RFP80RegClassID:
1960 return load ? X86::LD_Fp80m : X86::ST_FpP80m;
1961 case X86::RFP64RegClassID:
1962 return load ? X86::LD_Fp64m : X86::ST_Fp64m;
1963 case X86::RFP32RegClassID:
1964 return load ? X86::LD_Fp32m : X86::ST_Fp32m;
1965 case X86::FR32RegClassID:
1966 return load ? X86::MOVSSrm : X86::MOVSSmr;
1967 case X86::FR64RegClassID:
1968 return load ? X86::MOVSDrm : X86::MOVSDmr;
1969 case X86::VR128RegClassID:
1970 // If stack is realigned we can use aligned stores.
1972 return load ? X86::MOVAPSrm : X86::MOVAPSmr;
1974 return load ? X86::MOVUPSrm : X86::MOVUPSmr;
1975 case X86::VR64RegClassID:
1976 return load ? X86::MMX_MOVQ64rm : X86::MMX_MOVQ64mr;
1980 static unsigned getStoreRegOpcode(unsigned SrcReg,
1981 const TargetRegisterClass *RC,
1982 bool isStackAligned,
1983 TargetMachine &TM) {
1984 return getLoadStoreRegOpcode(SrcReg, RC, isStackAligned, TM, false);
1988 static unsigned getLoadRegOpcode(unsigned DestReg,
1989 const TargetRegisterClass *RC,
1990 bool isStackAligned,
1991 const TargetMachine &TM) {
1992 return getLoadStoreRegOpcode(DestReg, RC, isStackAligned, TM, true);
1995 void X86InstrInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
1996 MachineBasicBlock::iterator MI,
1997 unsigned SrcReg, bool isKill, int FrameIdx,
1998 const TargetRegisterClass *RC,
1999 const TargetRegisterInfo *TRI) const {
2000 const MachineFunction &MF = *MBB.getParent();
2001 bool isAligned = (RI.getStackAlignment() >= 16) || RI.canRealignStack(MF);
2002 unsigned Opc = getStoreRegOpcode(SrcReg, RC, isAligned, TM);
2003 DebugLoc DL = MBB.findDebugLoc(MI);
2004 addFrameReference(BuildMI(MBB, MI, DL, get(Opc)), FrameIdx)
2005 .addReg(SrcReg, getKillRegState(isKill));
2008 void X86InstrInfo::storeRegToAddr(MachineFunction &MF, unsigned SrcReg,
2010 SmallVectorImpl<MachineOperand> &Addr,
2011 const TargetRegisterClass *RC,
2012 MachineInstr::mmo_iterator MMOBegin,
2013 MachineInstr::mmo_iterator MMOEnd,
2014 SmallVectorImpl<MachineInstr*> &NewMIs) const {
2015 bool isAligned = MMOBegin != MMOEnd && (*MMOBegin)->getAlignment() >= 16;
2016 unsigned Opc = getStoreRegOpcode(SrcReg, RC, isAligned, TM);
2018 MachineInstrBuilder MIB = BuildMI(MF, DL, get(Opc));
2019 for (unsigned i = 0, e = Addr.size(); i != e; ++i)
2020 MIB.addOperand(Addr[i]);
2021 MIB.addReg(SrcReg, getKillRegState(isKill));
2022 (*MIB).setMemRefs(MMOBegin, MMOEnd);
2023 NewMIs.push_back(MIB);
2027 void X86InstrInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
2028 MachineBasicBlock::iterator MI,
2029 unsigned DestReg, int FrameIdx,
2030 const TargetRegisterClass *RC,
2031 const TargetRegisterInfo *TRI) const {
2032 const MachineFunction &MF = *MBB.getParent();
2033 bool isAligned = (RI.getStackAlignment() >= 16) || RI.canRealignStack(MF);
2034 unsigned Opc = getLoadRegOpcode(DestReg, RC, isAligned, TM);
2035 DebugLoc DL = MBB.findDebugLoc(MI);
2036 addFrameReference(BuildMI(MBB, MI, DL, get(Opc), DestReg), FrameIdx);
2039 void X86InstrInfo::loadRegFromAddr(MachineFunction &MF, unsigned DestReg,
2040 SmallVectorImpl<MachineOperand> &Addr,
2041 const TargetRegisterClass *RC,
2042 MachineInstr::mmo_iterator MMOBegin,
2043 MachineInstr::mmo_iterator MMOEnd,
2044 SmallVectorImpl<MachineInstr*> &NewMIs) const {
2045 bool isAligned = MMOBegin != MMOEnd && (*MMOBegin)->getAlignment() >= 16;
2046 unsigned Opc = getLoadRegOpcode(DestReg, RC, isAligned, TM);
2048 MachineInstrBuilder MIB = BuildMI(MF, DL, get(Opc), DestReg);
2049 for (unsigned i = 0, e = Addr.size(); i != e; ++i)
2050 MIB.addOperand(Addr[i]);
2051 (*MIB).setMemRefs(MMOBegin, MMOEnd);
2052 NewMIs.push_back(MIB);
2055 bool X86InstrInfo::spillCalleeSavedRegisters(MachineBasicBlock &MBB,
2056 MachineBasicBlock::iterator MI,
2057 const std::vector<CalleeSavedInfo> &CSI,
2058 const TargetRegisterInfo *TRI) const {
2062 DebugLoc DL = MBB.findDebugLoc(MI);
2064 bool is64Bit = TM.getSubtarget<X86Subtarget>().is64Bit();
2065 bool isWin64 = TM.getSubtarget<X86Subtarget>().isTargetWin64();
2066 unsigned SlotSize = is64Bit ? 8 : 4;
2068 MachineFunction &MF = *MBB.getParent();
2069 unsigned FPReg = RI.getFrameRegister(MF);
2070 X86MachineFunctionInfo *X86FI = MF.getInfo<X86MachineFunctionInfo>();
2071 unsigned CalleeFrameSize = 0;
2073 unsigned Opc = is64Bit ? X86::PUSH64r : X86::PUSH32r;
2074 for (unsigned i = CSI.size(); i != 0; --i) {
2075 unsigned Reg = CSI[i-1].getReg();
2076 // Add the callee-saved register as live-in. It's killed at the spill.
2079 // X86RegisterInfo::emitPrologue will handle spilling of frame register.
2081 if (!X86::VR128RegClass.contains(Reg) && !isWin64) {
2082 CalleeFrameSize += SlotSize;
2083 BuildMI(MBB, MI, DL, get(Opc)).addReg(Reg, RegState::Kill);
2085 storeRegToStackSlot(MBB, MI, Reg, true, CSI[i-1].getFrameIdx(),
2086 &X86::VR128RegClass, &RI);
2090 X86FI->setCalleeSavedFrameSize(CalleeFrameSize);
2094 bool X86InstrInfo::restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
2095 MachineBasicBlock::iterator MI,
2096 const std::vector<CalleeSavedInfo> &CSI,
2097 const TargetRegisterInfo *TRI) const {
2101 DebugLoc DL = MBB.findDebugLoc(MI);
2103 MachineFunction &MF = *MBB.getParent();
2104 unsigned FPReg = RI.getFrameRegister(MF);
2105 bool is64Bit = TM.getSubtarget<X86Subtarget>().is64Bit();
2106 bool isWin64 = TM.getSubtarget<X86Subtarget>().isTargetWin64();
2107 unsigned Opc = is64Bit ? X86::POP64r : X86::POP32r;
2108 for (unsigned i = 0, e = CSI.size(); i != e; ++i) {
2109 unsigned Reg = CSI[i].getReg();
2111 // X86RegisterInfo::emitEpilogue will handle restoring of frame register.
2113 if (!X86::VR128RegClass.contains(Reg) && !isWin64) {
2114 BuildMI(MBB, MI, DL, get(Opc), Reg);
2116 loadRegFromStackSlot(MBB, MI, Reg, CSI[i].getFrameIdx(),
2117 &X86::VR128RegClass, &RI);
2124 X86InstrInfo::emitFrameIndexDebugValue(MachineFunction &MF,
2125 int FrameIx, uint64_t Offset,
2126 const MDNode *MDPtr,
2127 DebugLoc DL) const {
2129 AM.BaseType = X86AddressMode::FrameIndexBase;
2130 AM.Base.FrameIndex = FrameIx;
2131 MachineInstrBuilder MIB = BuildMI(MF, DL, get(X86::DBG_VALUE));
2132 addFullAddress(MIB, AM).addImm(Offset).addMetadata(MDPtr);
2136 static MachineInstr *FuseTwoAddrInst(MachineFunction &MF, unsigned Opcode,
2137 const SmallVectorImpl<MachineOperand> &MOs,
2139 const TargetInstrInfo &TII) {
2140 // Create the base instruction with the memory operand as the first part.
2141 MachineInstr *NewMI = MF.CreateMachineInstr(TII.get(Opcode),
2142 MI->getDebugLoc(), true);
2143 MachineInstrBuilder MIB(NewMI);
2144 unsigned NumAddrOps = MOs.size();
2145 for (unsigned i = 0; i != NumAddrOps; ++i)
2146 MIB.addOperand(MOs[i]);
2147 if (NumAddrOps < 4) // FrameIndex only
2150 // Loop over the rest of the ri operands, converting them over.
2151 unsigned NumOps = MI->getDesc().getNumOperands()-2;
2152 for (unsigned i = 0; i != NumOps; ++i) {
2153 MachineOperand &MO = MI->getOperand(i+2);
2156 for (unsigned i = NumOps+2, e = MI->getNumOperands(); i != e; ++i) {
2157 MachineOperand &MO = MI->getOperand(i);
2163 static MachineInstr *FuseInst(MachineFunction &MF,
2164 unsigned Opcode, unsigned OpNo,
2165 const SmallVectorImpl<MachineOperand> &MOs,
2166 MachineInstr *MI, const TargetInstrInfo &TII) {
2167 MachineInstr *NewMI = MF.CreateMachineInstr(TII.get(Opcode),
2168 MI->getDebugLoc(), true);
2169 MachineInstrBuilder MIB(NewMI);
2171 for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
2172 MachineOperand &MO = MI->getOperand(i);
2174 assert(MO.isReg() && "Expected to fold into reg operand!");
2175 unsigned NumAddrOps = MOs.size();
2176 for (unsigned i = 0; i != NumAddrOps; ++i)
2177 MIB.addOperand(MOs[i]);
2178 if (NumAddrOps < 4) // FrameIndex only
2187 static MachineInstr *MakeM0Inst(const TargetInstrInfo &TII, unsigned Opcode,
2188 const SmallVectorImpl<MachineOperand> &MOs,
2190 MachineFunction &MF = *MI->getParent()->getParent();
2191 MachineInstrBuilder MIB = BuildMI(MF, MI->getDebugLoc(), TII.get(Opcode));
2193 unsigned NumAddrOps = MOs.size();
2194 for (unsigned i = 0; i != NumAddrOps; ++i)
2195 MIB.addOperand(MOs[i]);
2196 if (NumAddrOps < 4) // FrameIndex only
2198 return MIB.addImm(0);
2202 X86InstrInfo::foldMemoryOperandImpl(MachineFunction &MF,
2203 MachineInstr *MI, unsigned i,
2204 const SmallVectorImpl<MachineOperand> &MOs,
2205 unsigned Size, unsigned Align) const {
2206 const DenseMap<unsigned*, std::pair<unsigned,unsigned> > *OpcodeTablePtr=NULL;
2207 bool isTwoAddrFold = false;
2208 unsigned NumOps = MI->getDesc().getNumOperands();
2209 bool isTwoAddr = NumOps > 1 &&
2210 MI->getDesc().getOperandConstraint(1, TOI::TIED_TO) != -1;
2212 MachineInstr *NewMI = NULL;
2213 // Folding a memory location into the two-address part of a two-address
2214 // instruction is different than folding it other places. It requires
2215 // replacing the *two* registers with the memory location.
2216 if (isTwoAddr && NumOps >= 2 && i < 2 &&
2217 MI->getOperand(0).isReg() &&
2218 MI->getOperand(1).isReg() &&
2219 MI->getOperand(0).getReg() == MI->getOperand(1).getReg()) {
2220 OpcodeTablePtr = &RegOp2MemOpTable2Addr;
2221 isTwoAddrFold = true;
2222 } else if (i == 0) { // If operand 0
2223 if (MI->getOpcode() == X86::MOV64r0)
2224 NewMI = MakeM0Inst(*this, X86::MOV64mi32, MOs, MI);
2225 else if (MI->getOpcode() == X86::MOV32r0)
2226 NewMI = MakeM0Inst(*this, X86::MOV32mi, MOs, MI);
2227 else if (MI->getOpcode() == X86::MOV16r0)
2228 NewMI = MakeM0Inst(*this, X86::MOV16mi, MOs, MI);
2229 else if (MI->getOpcode() == X86::MOV8r0)
2230 NewMI = MakeM0Inst(*this, X86::MOV8mi, MOs, MI);
2234 OpcodeTablePtr = &RegOp2MemOpTable0;
2235 } else if (i == 1) {
2236 OpcodeTablePtr = &RegOp2MemOpTable1;
2237 } else if (i == 2) {
2238 OpcodeTablePtr = &RegOp2MemOpTable2;
2241 // If table selected...
2242 if (OpcodeTablePtr) {
2243 // Find the Opcode to fuse
2244 DenseMap<unsigned*, std::pair<unsigned,unsigned> >::const_iterator I =
2245 OpcodeTablePtr->find((unsigned*)MI->getOpcode());
2246 if (I != OpcodeTablePtr->end()) {
2247 unsigned Opcode = I->second.first;
2248 unsigned MinAlign = I->second.second;
2249 if (Align < MinAlign)
2251 bool NarrowToMOV32rm = false;
2253 unsigned RCSize = MI->getDesc().OpInfo[i].getRegClass(&RI)->getSize();
2254 if (Size < RCSize) {
2255 // Check if it's safe to fold the load. If the size of the object is
2256 // narrower than the load width, then it's not.
2257 if (Opcode != X86::MOV64rm || RCSize != 8 || Size != 4)
2259 // If this is a 64-bit load, but the spill slot is 32, then we can do
2260 // a 32-bit load which is implicitly zero-extended. This likely is due
2261 // to liveintervalanalysis remat'ing a load from stack slot.
2262 if (MI->getOperand(0).getSubReg() || MI->getOperand(1).getSubReg())
2264 Opcode = X86::MOV32rm;
2265 NarrowToMOV32rm = true;
2270 NewMI = FuseTwoAddrInst(MF, Opcode, MOs, MI, *this);
2272 NewMI = FuseInst(MF, Opcode, i, MOs, MI, *this);
2274 if (NarrowToMOV32rm) {
2275 // If this is the special case where we use a MOV32rm to load a 32-bit
2276 // value and zero-extend the top bits. Change the destination register
2278 unsigned DstReg = NewMI->getOperand(0).getReg();
2279 if (TargetRegisterInfo::isPhysicalRegister(DstReg))
2280 NewMI->getOperand(0).setReg(RI.getSubReg(DstReg,
2283 NewMI->getOperand(0).setSubReg(X86::sub_32bit);
2290 if (PrintFailedFusing && !MI->isCopy())
2291 dbgs() << "We failed to fuse operand " << i << " in " << *MI;
2296 MachineInstr* X86InstrInfo::foldMemoryOperandImpl(MachineFunction &MF,
2298 const SmallVectorImpl<unsigned> &Ops,
2299 int FrameIndex) const {
2300 // Check switch flag
2301 if (NoFusing) return NULL;
2303 if (!MF.getFunction()->hasFnAttr(Attribute::OptimizeForSize))
2304 switch (MI->getOpcode()) {
2305 case X86::CVTSD2SSrr:
2306 case X86::Int_CVTSD2SSrr:
2307 case X86::CVTSS2SDrr:
2308 case X86::Int_CVTSS2SDrr:
2310 case X86::RCPSSr_Int:
2311 case X86::ROUNDSDr_Int:
2312 case X86::ROUNDSSr_Int:
2314 case X86::RSQRTSSr_Int:
2316 case X86::SQRTSSr_Int:
2320 const MachineFrameInfo *MFI = MF.getFrameInfo();
2321 unsigned Size = MFI->getObjectSize(FrameIndex);
2322 unsigned Alignment = MFI->getObjectAlignment(FrameIndex);
2323 if (Ops.size() == 2 && Ops[0] == 0 && Ops[1] == 1) {
2324 unsigned NewOpc = 0;
2325 unsigned RCSize = 0;
2326 switch (MI->getOpcode()) {
2327 default: return NULL;
2328 case X86::TEST8rr: NewOpc = X86::CMP8ri; RCSize = 1; break;
2329 case X86::TEST16rr: NewOpc = X86::CMP16ri8; RCSize = 2; break;
2330 case X86::TEST32rr: NewOpc = X86::CMP32ri8; RCSize = 4; break;
2331 case X86::TEST64rr: NewOpc = X86::CMP64ri8; RCSize = 8; break;
2333 // Check if it's safe to fold the load. If the size of the object is
2334 // narrower than the load width, then it's not.
2337 // Change to CMPXXri r, 0 first.
2338 MI->setDesc(get(NewOpc));
2339 MI->getOperand(1).ChangeToImmediate(0);
2340 } else if (Ops.size() != 1)
2343 SmallVector<MachineOperand,4> MOs;
2344 MOs.push_back(MachineOperand::CreateFI(FrameIndex));
2345 return foldMemoryOperandImpl(MF, MI, Ops[0], MOs, Size, Alignment);
2348 MachineInstr* X86InstrInfo::foldMemoryOperandImpl(MachineFunction &MF,
2350 const SmallVectorImpl<unsigned> &Ops,
2351 MachineInstr *LoadMI) const {
2352 // Check switch flag
2353 if (NoFusing) return NULL;
2355 if (!MF.getFunction()->hasFnAttr(Attribute::OptimizeForSize))
2356 switch (MI->getOpcode()) {
2357 case X86::CVTSD2SSrr:
2358 case X86::Int_CVTSD2SSrr:
2359 case X86::CVTSS2SDrr:
2360 case X86::Int_CVTSS2SDrr:
2362 case X86::RCPSSr_Int:
2363 case X86::ROUNDSDr_Int:
2364 case X86::ROUNDSSr_Int:
2366 case X86::RSQRTSSr_Int:
2368 case X86::SQRTSSr_Int:
2372 // Determine the alignment of the load.
2373 unsigned Alignment = 0;
2374 if (LoadMI->hasOneMemOperand())
2375 Alignment = (*LoadMI->memoperands_begin())->getAlignment();
2377 switch (LoadMI->getOpcode()) {
2381 case X86::V_SETALLONES:
2391 llvm_unreachable("Don't know how to fold this instruction!");
2393 if (Ops.size() == 2 && Ops[0] == 0 && Ops[1] == 1) {
2394 unsigned NewOpc = 0;
2395 switch (MI->getOpcode()) {
2396 default: return NULL;
2397 case X86::TEST8rr: NewOpc = X86::CMP8ri; break;
2398 case X86::TEST16rr: NewOpc = X86::CMP16ri8; break;
2399 case X86::TEST32rr: NewOpc = X86::CMP32ri8; break;
2400 case X86::TEST64rr: NewOpc = X86::CMP64ri8; break;
2402 // Change to CMPXXri r, 0 first.
2403 MI->setDesc(get(NewOpc));
2404 MI->getOperand(1).ChangeToImmediate(0);
2405 } else if (Ops.size() != 1)
2408 SmallVector<MachineOperand,X86::AddrNumOperands> MOs;
2409 switch (LoadMI->getOpcode()) {
2413 case X86::V_SETALLONES:
2415 case X86::FsFLD0SS: {
2416 // Folding a V_SET0P? or V_SETALLONES as a load, to ease register pressure.
2417 // Create a constant-pool entry and operands to load from it.
2419 // Medium and large mode can't fold loads this way.
2420 if (TM.getCodeModel() != CodeModel::Small &&
2421 TM.getCodeModel() != CodeModel::Kernel)
2424 // x86-32 PIC requires a PIC base register for constant pools.
2425 unsigned PICBase = 0;
2426 if (TM.getRelocationModel() == Reloc::PIC_) {
2427 if (TM.getSubtarget<X86Subtarget>().is64Bit())
2430 // FIXME: PICBase = getGlobalBaseReg(&MF);
2431 // This doesn't work for several reasons.
2432 // 1. GlobalBaseReg may have been spilled.
2433 // 2. It may not be live at MI.
2437 // Create a constant-pool entry.
2438 MachineConstantPool &MCP = *MF.getConstantPool();
2440 if (LoadMI->getOpcode() == X86::FsFLD0SS)
2441 Ty = Type::getFloatTy(MF.getFunction()->getContext());
2442 else if (LoadMI->getOpcode() == X86::FsFLD0SD)
2443 Ty = Type::getDoubleTy(MF.getFunction()->getContext());
2445 Ty = VectorType::get(Type::getInt32Ty(MF.getFunction()->getContext()), 4);
2446 const Constant *C = LoadMI->getOpcode() == X86::V_SETALLONES ?
2447 Constant::getAllOnesValue(Ty) :
2448 Constant::getNullValue(Ty);
2449 unsigned CPI = MCP.getConstantPoolIndex(C, Alignment);
2451 // Create operands to load from the constant pool entry.
2452 MOs.push_back(MachineOperand::CreateReg(PICBase, false));
2453 MOs.push_back(MachineOperand::CreateImm(1));
2454 MOs.push_back(MachineOperand::CreateReg(0, false));
2455 MOs.push_back(MachineOperand::CreateCPI(CPI, 0));
2456 MOs.push_back(MachineOperand::CreateReg(0, false));
2460 // Folding a normal load. Just copy the load's address operands.
2461 unsigned NumOps = LoadMI->getDesc().getNumOperands();
2462 for (unsigned i = NumOps - X86::AddrNumOperands; i != NumOps; ++i)
2463 MOs.push_back(LoadMI->getOperand(i));
2467 return foldMemoryOperandImpl(MF, MI, Ops[0], MOs, 0, Alignment);
2471 bool X86InstrInfo::canFoldMemoryOperand(const MachineInstr *MI,
2472 const SmallVectorImpl<unsigned> &Ops) const {
2473 // Check switch flag
2474 if (NoFusing) return 0;
2476 if (Ops.size() == 2 && Ops[0] == 0 && Ops[1] == 1) {
2477 switch (MI->getOpcode()) {
2478 default: return false;
2487 if (Ops.size() != 1)
2490 unsigned OpNum = Ops[0];
2491 unsigned Opc = MI->getOpcode();
2492 unsigned NumOps = MI->getDesc().getNumOperands();
2493 bool isTwoAddr = NumOps > 1 &&
2494 MI->getDesc().getOperandConstraint(1, TOI::TIED_TO) != -1;
2496 // Folding a memory location into the two-address part of a two-address
2497 // instruction is different than folding it other places. It requires
2498 // replacing the *two* registers with the memory location.
2499 const DenseMap<unsigned*, std::pair<unsigned,unsigned> > *OpcodeTablePtr=NULL;
2500 if (isTwoAddr && NumOps >= 2 && OpNum < 2) {
2501 OpcodeTablePtr = &RegOp2MemOpTable2Addr;
2502 } else if (OpNum == 0) { // If operand 0
2511 OpcodeTablePtr = &RegOp2MemOpTable0;
2512 } else if (OpNum == 1) {
2513 OpcodeTablePtr = &RegOp2MemOpTable1;
2514 } else if (OpNum == 2) {
2515 OpcodeTablePtr = &RegOp2MemOpTable2;
2518 if (OpcodeTablePtr) {
2519 // Find the Opcode to fuse
2520 DenseMap<unsigned*, std::pair<unsigned,unsigned> >::const_iterator I =
2521 OpcodeTablePtr->find((unsigned*)Opc);
2522 if (I != OpcodeTablePtr->end())
2525 return TargetInstrInfoImpl::canFoldMemoryOperand(MI, Ops);
2528 bool X86InstrInfo::unfoldMemoryOperand(MachineFunction &MF, MachineInstr *MI,
2529 unsigned Reg, bool UnfoldLoad, bool UnfoldStore,
2530 SmallVectorImpl<MachineInstr*> &NewMIs) const {
2531 DenseMap<unsigned*, std::pair<unsigned,unsigned> >::const_iterator I =
2532 MemOp2RegOpTable.find((unsigned*)MI->getOpcode());
2533 if (I == MemOp2RegOpTable.end())
2535 unsigned Opc = I->second.first;
2536 unsigned Index = I->second.second & 0xf;
2537 bool FoldedLoad = I->second.second & (1 << 4);
2538 bool FoldedStore = I->second.second & (1 << 5);
2539 if (UnfoldLoad && !FoldedLoad)
2541 UnfoldLoad &= FoldedLoad;
2542 if (UnfoldStore && !FoldedStore)
2544 UnfoldStore &= FoldedStore;
2546 const TargetInstrDesc &TID = get(Opc);
2547 const TargetOperandInfo &TOI = TID.OpInfo[Index];
2548 const TargetRegisterClass *RC = TOI.getRegClass(&RI);
2549 if (!MI->hasOneMemOperand() &&
2550 RC == &X86::VR128RegClass &&
2551 !TM.getSubtarget<X86Subtarget>().isUnalignedMemAccessFast())
2552 // Without memoperands, loadRegFromAddr and storeRegToStackSlot will
2553 // conservatively assume the address is unaligned. That's bad for
2556 SmallVector<MachineOperand, X86::AddrNumOperands> AddrOps;
2557 SmallVector<MachineOperand,2> BeforeOps;
2558 SmallVector<MachineOperand,2> AfterOps;
2559 SmallVector<MachineOperand,4> ImpOps;
2560 for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
2561 MachineOperand &Op = MI->getOperand(i);
2562 if (i >= Index && i < Index + X86::AddrNumOperands)
2563 AddrOps.push_back(Op);
2564 else if (Op.isReg() && Op.isImplicit())
2565 ImpOps.push_back(Op);
2567 BeforeOps.push_back(Op);
2569 AfterOps.push_back(Op);
2572 // Emit the load instruction.
2574 std::pair<MachineInstr::mmo_iterator,
2575 MachineInstr::mmo_iterator> MMOs =
2576 MF.extractLoadMemRefs(MI->memoperands_begin(),
2577 MI->memoperands_end());
2578 loadRegFromAddr(MF, Reg, AddrOps, RC, MMOs.first, MMOs.second, NewMIs);
2580 // Address operands cannot be marked isKill.
2581 for (unsigned i = 1; i != 1 + X86::AddrNumOperands; ++i) {
2582 MachineOperand &MO = NewMIs[0]->getOperand(i);
2584 MO.setIsKill(false);
2589 // Emit the data processing instruction.
2590 MachineInstr *DataMI = MF.CreateMachineInstr(TID, MI->getDebugLoc(), true);
2591 MachineInstrBuilder MIB(DataMI);
2594 MIB.addReg(Reg, RegState::Define);
2595 for (unsigned i = 0, e = BeforeOps.size(); i != e; ++i)
2596 MIB.addOperand(BeforeOps[i]);
2599 for (unsigned i = 0, e = AfterOps.size(); i != e; ++i)
2600 MIB.addOperand(AfterOps[i]);
2601 for (unsigned i = 0, e = ImpOps.size(); i != e; ++i) {
2602 MachineOperand &MO = ImpOps[i];
2603 MIB.addReg(MO.getReg(),
2604 getDefRegState(MO.isDef()) |
2605 RegState::Implicit |
2606 getKillRegState(MO.isKill()) |
2607 getDeadRegState(MO.isDead()) |
2608 getUndefRegState(MO.isUndef()));
2610 // Change CMP32ri r, 0 back to TEST32rr r, r, etc.
2611 unsigned NewOpc = 0;
2612 switch (DataMI->getOpcode()) {
2614 case X86::CMP64ri32:
2621 MachineOperand &MO0 = DataMI->getOperand(0);
2622 MachineOperand &MO1 = DataMI->getOperand(1);
2623 if (MO1.getImm() == 0) {
2624 switch (DataMI->getOpcode()) {
2627 case X86::CMP64ri32: NewOpc = X86::TEST64rr; break;
2629 case X86::CMP32ri: NewOpc = X86::TEST32rr; break;
2631 case X86::CMP16ri: NewOpc = X86::TEST16rr; break;
2632 case X86::CMP8ri: NewOpc = X86::TEST8rr; break;
2634 DataMI->setDesc(get(NewOpc));
2635 MO1.ChangeToRegister(MO0.getReg(), false);
2639 NewMIs.push_back(DataMI);
2641 // Emit the store instruction.
2643 const TargetRegisterClass *DstRC = TID.OpInfo[0].getRegClass(&RI);
2644 std::pair<MachineInstr::mmo_iterator,
2645 MachineInstr::mmo_iterator> MMOs =
2646 MF.extractStoreMemRefs(MI->memoperands_begin(),
2647 MI->memoperands_end());
2648 storeRegToAddr(MF, Reg, true, AddrOps, DstRC, MMOs.first, MMOs.second, NewMIs);
2655 X86InstrInfo::unfoldMemoryOperand(SelectionDAG &DAG, SDNode *N,
2656 SmallVectorImpl<SDNode*> &NewNodes) const {
2657 if (!N->isMachineOpcode())
2660 DenseMap<unsigned*, std::pair<unsigned,unsigned> >::const_iterator I =
2661 MemOp2RegOpTable.find((unsigned*)N->getMachineOpcode());
2662 if (I == MemOp2RegOpTable.end())
2664 unsigned Opc = I->second.first;
2665 unsigned Index = I->second.second & 0xf;
2666 bool FoldedLoad = I->second.second & (1 << 4);
2667 bool FoldedStore = I->second.second & (1 << 5);
2668 const TargetInstrDesc &TID = get(Opc);
2669 const TargetRegisterClass *RC = TID.OpInfo[Index].getRegClass(&RI);
2670 unsigned NumDefs = TID.NumDefs;
2671 std::vector<SDValue> AddrOps;
2672 std::vector<SDValue> BeforeOps;
2673 std::vector<SDValue> AfterOps;
2674 DebugLoc dl = N->getDebugLoc();
2675 unsigned NumOps = N->getNumOperands();
2676 for (unsigned i = 0; i != NumOps-1; ++i) {
2677 SDValue Op = N->getOperand(i);
2678 if (i >= Index-NumDefs && i < Index-NumDefs + X86::AddrNumOperands)
2679 AddrOps.push_back(Op);
2680 else if (i < Index-NumDefs)
2681 BeforeOps.push_back(Op);
2682 else if (i > Index-NumDefs)
2683 AfterOps.push_back(Op);
2685 SDValue Chain = N->getOperand(NumOps-1);
2686 AddrOps.push_back(Chain);
2688 // Emit the load instruction.
2690 MachineFunction &MF = DAG.getMachineFunction();
2692 EVT VT = *RC->vt_begin();
2693 std::pair<MachineInstr::mmo_iterator,
2694 MachineInstr::mmo_iterator> MMOs =
2695 MF.extractLoadMemRefs(cast<MachineSDNode>(N)->memoperands_begin(),
2696 cast<MachineSDNode>(N)->memoperands_end());
2697 if (!(*MMOs.first) &&
2698 RC == &X86::VR128RegClass &&
2699 !TM.getSubtarget<X86Subtarget>().isUnalignedMemAccessFast())
2700 // Do not introduce a slow unaligned load.
2702 bool isAligned = (*MMOs.first) && (*MMOs.first)->getAlignment() >= 16;
2703 Load = DAG.getMachineNode(getLoadRegOpcode(0, RC, isAligned, TM), dl,
2704 VT, MVT::Other, &AddrOps[0], AddrOps.size());
2705 NewNodes.push_back(Load);
2707 // Preserve memory reference information.
2708 cast<MachineSDNode>(Load)->setMemRefs(MMOs.first, MMOs.second);
2711 // Emit the data processing instruction.
2712 std::vector<EVT> VTs;
2713 const TargetRegisterClass *DstRC = 0;
2714 if (TID.getNumDefs() > 0) {
2715 DstRC = TID.OpInfo[0].getRegClass(&RI);
2716 VTs.push_back(*DstRC->vt_begin());
2718 for (unsigned i = 0, e = N->getNumValues(); i != e; ++i) {
2719 EVT VT = N->getValueType(i);
2720 if (VT != MVT::Other && i >= (unsigned)TID.getNumDefs())
2724 BeforeOps.push_back(SDValue(Load, 0));
2725 std::copy(AfterOps.begin(), AfterOps.end(), std::back_inserter(BeforeOps));
2726 SDNode *NewNode= DAG.getMachineNode(Opc, dl, VTs, &BeforeOps[0],
2728 NewNodes.push_back(NewNode);
2730 // Emit the store instruction.
2733 AddrOps.push_back(SDValue(NewNode, 0));
2734 AddrOps.push_back(Chain);
2735 std::pair<MachineInstr::mmo_iterator,
2736 MachineInstr::mmo_iterator> MMOs =
2737 MF.extractStoreMemRefs(cast<MachineSDNode>(N)->memoperands_begin(),
2738 cast<MachineSDNode>(N)->memoperands_end());
2739 if (!(*MMOs.first) &&
2740 RC == &X86::VR128RegClass &&
2741 !TM.getSubtarget<X86Subtarget>().isUnalignedMemAccessFast())
2742 // Do not introduce a slow unaligned store.
2744 bool isAligned = (*MMOs.first) && (*MMOs.first)->getAlignment() >= 16;
2745 SDNode *Store = DAG.getMachineNode(getStoreRegOpcode(0, DstRC,
2748 &AddrOps[0], AddrOps.size());
2749 NewNodes.push_back(Store);
2751 // Preserve memory reference information.
2752 cast<MachineSDNode>(Load)->setMemRefs(MMOs.first, MMOs.second);
2758 unsigned X86InstrInfo::getOpcodeAfterMemoryUnfold(unsigned Opc,
2759 bool UnfoldLoad, bool UnfoldStore,
2760 unsigned *LoadRegIndex) const {
2761 DenseMap<unsigned*, std::pair<unsigned,unsigned> >::const_iterator I =
2762 MemOp2RegOpTable.find((unsigned*)Opc);
2763 if (I == MemOp2RegOpTable.end())
2765 bool FoldedLoad = I->second.second & (1 << 4);
2766 bool FoldedStore = I->second.second & (1 << 5);
2767 if (UnfoldLoad && !FoldedLoad)
2769 if (UnfoldStore && !FoldedStore)
2772 *LoadRegIndex = I->second.second & 0xf;
2773 return I->second.first;
2777 X86InstrInfo::areLoadsFromSameBasePtr(SDNode *Load1, SDNode *Load2,
2778 int64_t &Offset1, int64_t &Offset2) const {
2779 if (!Load1->isMachineOpcode() || !Load2->isMachineOpcode())
2781 unsigned Opc1 = Load1->getMachineOpcode();
2782 unsigned Opc2 = Load2->getMachineOpcode();
2784 default: return false;
2794 case X86::MMX_MOVD64rm:
2795 case X86::MMX_MOVQ64rm:
2796 case X86::FsMOVAPSrm:
2797 case X86::FsMOVAPDrm:
2800 case X86::MOVUPSrm_Int:
2804 case X86::MOVDQUrm_Int:
2808 default: return false;
2818 case X86::MMX_MOVD64rm:
2819 case X86::MMX_MOVQ64rm:
2820 case X86::FsMOVAPSrm:
2821 case X86::FsMOVAPDrm:
2824 case X86::MOVUPSrm_Int:
2828 case X86::MOVDQUrm_Int:
2832 // Check if chain operands and base addresses match.
2833 if (Load1->getOperand(0) != Load2->getOperand(0) ||
2834 Load1->getOperand(5) != Load2->getOperand(5))
2836 // Segment operands should match as well.
2837 if (Load1->getOperand(4) != Load2->getOperand(4))
2839 // Scale should be 1, Index should be Reg0.
2840 if (Load1->getOperand(1) == Load2->getOperand(1) &&
2841 Load1->getOperand(2) == Load2->getOperand(2)) {
2842 if (cast<ConstantSDNode>(Load1->getOperand(1))->getZExtValue() != 1)
2845 // Now let's examine the displacements.
2846 if (isa<ConstantSDNode>(Load1->getOperand(3)) &&
2847 isa<ConstantSDNode>(Load2->getOperand(3))) {
2848 Offset1 = cast<ConstantSDNode>(Load1->getOperand(3))->getSExtValue();
2849 Offset2 = cast<ConstantSDNode>(Load2->getOperand(3))->getSExtValue();
2856 bool X86InstrInfo::shouldScheduleLoadsNear(SDNode *Load1, SDNode *Load2,
2857 int64_t Offset1, int64_t Offset2,
2858 unsigned NumLoads) const {
2859 assert(Offset2 > Offset1);
2860 if ((Offset2 - Offset1) / 8 > 64)
2863 unsigned Opc1 = Load1->getMachineOpcode();
2864 unsigned Opc2 = Load2->getMachineOpcode();
2866 return false; // FIXME: overly conservative?
2873 case X86::MMX_MOVD64rm:
2874 case X86::MMX_MOVQ64rm:
2878 EVT VT = Load1->getValueType(0);
2879 switch (VT.getSimpleVT().SimpleTy) {
2881 // XMM registers. In 64-bit mode we can be a bit more aggressive since we
2882 // have 16 of them to play with.
2883 if (TM.getSubtargetImpl()->is64Bit()) {
2886 } else if (NumLoads) {
2906 ReverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const {
2907 assert(Cond.size() == 1 && "Invalid X86 branch condition!");
2908 X86::CondCode CC = static_cast<X86::CondCode>(Cond[0].getImm());
2909 if (CC == X86::COND_NE_OR_P || CC == X86::COND_NP_OR_E)
2911 Cond[0].setImm(GetOppositeBranchCondition(CC));
2916 isSafeToMoveRegClassDefs(const TargetRegisterClass *RC) const {
2917 // FIXME: Return false for x87 stack register classes for now. We can't
2918 // allow any loads of these registers before FpGet_ST0_80.
2919 return !(RC == &X86::CCRRegClass || RC == &X86::RFP32RegClass ||
2920 RC == &X86::RFP64RegClass || RC == &X86::RFP80RegClass);
2924 /// isX86_64ExtendedReg - Is the MachineOperand a x86-64 extended (r8 or higher)
2925 /// register? e.g. r8, xmm8, xmm13, etc.
2926 bool X86InstrInfo::isX86_64ExtendedReg(unsigned RegNo) {
2929 case X86::R8: case X86::R9: case X86::R10: case X86::R11:
2930 case X86::R12: case X86::R13: case X86::R14: case X86::R15:
2931 case X86::R8D: case X86::R9D: case X86::R10D: case X86::R11D:
2932 case X86::R12D: case X86::R13D: case X86::R14D: case X86::R15D:
2933 case X86::R8W: case X86::R9W: case X86::R10W: case X86::R11W:
2934 case X86::R12W: case X86::R13W: case X86::R14W: case X86::R15W:
2935 case X86::R8B: case X86::R9B: case X86::R10B: case X86::R11B:
2936 case X86::R12B: case X86::R13B: case X86::R14B: case X86::R15B:
2937 case X86::XMM8: case X86::XMM9: case X86::XMM10: case X86::XMM11:
2938 case X86::XMM12: case X86::XMM13: case X86::XMM14: case X86::XMM15:
2939 case X86::YMM8: case X86::YMM9: case X86::YMM10: case X86::YMM11:
2940 case X86::YMM12: case X86::YMM13: case X86::YMM14: case X86::YMM15:
2947 /// determineREX - Determine if the MachineInstr has to be encoded with a X86-64
2948 /// REX prefix which specifies 1) 64-bit instructions, 2) non-default operand
2949 /// size, and 3) use of X86-64 extended registers.
2950 unsigned X86InstrInfo::determineREX(const MachineInstr &MI) {
2952 const TargetInstrDesc &Desc = MI.getDesc();
2954 // Pseudo instructions do not need REX prefix byte.
2955 if ((Desc.TSFlags & X86II::FormMask) == X86II::Pseudo)
2957 if (Desc.TSFlags & X86II::REX_W)
2960 unsigned NumOps = Desc.getNumOperands();
2962 bool isTwoAddr = NumOps > 1 &&
2963 Desc.getOperandConstraint(1, TOI::TIED_TO) != -1;
2965 // If it accesses SPL, BPL, SIL, or DIL, then it requires a 0x40 REX prefix.
2966 unsigned i = isTwoAddr ? 1 : 0;
2967 for (unsigned e = NumOps; i != e; ++i) {
2968 const MachineOperand& MO = MI.getOperand(i);
2970 unsigned Reg = MO.getReg();
2971 if (isX86_64NonExtLowByteReg(Reg))
2976 switch (Desc.TSFlags & X86II::FormMask) {
2977 case X86II::MRMInitReg:
2978 if (isX86_64ExtendedReg(MI.getOperand(0)))
2979 REX |= (1 << 0) | (1 << 2);
2981 case X86II::MRMSrcReg: {
2982 if (isX86_64ExtendedReg(MI.getOperand(0)))
2984 i = isTwoAddr ? 2 : 1;
2985 for (unsigned e = NumOps; i != e; ++i) {
2986 const MachineOperand& MO = MI.getOperand(i);
2987 if (isX86_64ExtendedReg(MO))
2992 case X86II::MRMSrcMem: {
2993 if (isX86_64ExtendedReg(MI.getOperand(0)))
2996 i = isTwoAddr ? 2 : 1;
2997 for (; i != NumOps; ++i) {
2998 const MachineOperand& MO = MI.getOperand(i);
3000 if (isX86_64ExtendedReg(MO))
3007 case X86II::MRM0m: case X86II::MRM1m:
3008 case X86II::MRM2m: case X86II::MRM3m:
3009 case X86II::MRM4m: case X86II::MRM5m:
3010 case X86II::MRM6m: case X86II::MRM7m:
3011 case X86II::MRMDestMem: {
3012 unsigned e = (isTwoAddr ? X86::AddrNumOperands+1 : X86::AddrNumOperands);
3013 i = isTwoAddr ? 1 : 0;
3014 if (NumOps > e && isX86_64ExtendedReg(MI.getOperand(e)))
3017 for (; i != e; ++i) {
3018 const MachineOperand& MO = MI.getOperand(i);
3020 if (isX86_64ExtendedReg(MO))
3028 if (isX86_64ExtendedReg(MI.getOperand(0)))
3030 i = isTwoAddr ? 2 : 1;
3031 for (unsigned e = NumOps; i != e; ++i) {
3032 const MachineOperand& MO = MI.getOperand(i);
3033 if (isX86_64ExtendedReg(MO))
3043 /// sizePCRelativeBlockAddress - This method returns the size of a PC
3044 /// relative block address instruction
3046 static unsigned sizePCRelativeBlockAddress() {
3050 /// sizeGlobalAddress - Give the size of the emission of this global address
3052 static unsigned sizeGlobalAddress(bool dword) {
3053 return dword ? 8 : 4;
3056 /// sizeConstPoolAddress - Give the size of the emission of this constant
3059 static unsigned sizeConstPoolAddress(bool dword) {
3060 return dword ? 8 : 4;
3063 /// sizeExternalSymbolAddress - Give the size of the emission of this external
3066 static unsigned sizeExternalSymbolAddress(bool dword) {
3067 return dword ? 8 : 4;
3070 /// sizeJumpTableAddress - Give the size of the emission of this jump
3073 static unsigned sizeJumpTableAddress(bool dword) {
3074 return dword ? 8 : 4;
3077 static unsigned sizeConstant(unsigned Size) {
3081 static unsigned sizeRegModRMByte(){
3085 static unsigned sizeSIBByte(){
3089 static unsigned getDisplacementFieldSize(const MachineOperand *RelocOp) {
3090 unsigned FinalSize = 0;
3091 // If this is a simple integer displacement that doesn't require a relocation.
3093 FinalSize += sizeConstant(4);
3097 // Otherwise, this is something that requires a relocation.
3098 if (RelocOp->isGlobal()) {
3099 FinalSize += sizeGlobalAddress(false);
3100 } else if (RelocOp->isCPI()) {
3101 FinalSize += sizeConstPoolAddress(false);
3102 } else if (RelocOp->isJTI()) {
3103 FinalSize += sizeJumpTableAddress(false);
3105 llvm_unreachable("Unknown value to relocate!");
3110 static unsigned getMemModRMByteSize(const MachineInstr &MI, unsigned Op,
3111 bool IsPIC, bool Is64BitMode) {
3112 const MachineOperand &Op3 = MI.getOperand(Op+3);
3114 const MachineOperand *DispForReloc = 0;
3115 unsigned FinalSize = 0;
3117 // Figure out what sort of displacement we have to handle here.
3118 if (Op3.isGlobal()) {
3119 DispForReloc = &Op3;
3120 } else if (Op3.isCPI()) {
3121 if (Is64BitMode || IsPIC) {
3122 DispForReloc = &Op3;
3126 } else if (Op3.isJTI()) {
3127 if (Is64BitMode || IsPIC) {
3128 DispForReloc = &Op3;
3136 const MachineOperand &Base = MI.getOperand(Op);
3137 const MachineOperand &IndexReg = MI.getOperand(Op+2);
3139 unsigned BaseReg = Base.getReg();
3141 // Is a SIB byte needed?
3142 if ((!Is64BitMode || DispForReloc || BaseReg != 0) &&
3143 IndexReg.getReg() == 0 &&
3144 (BaseReg == 0 || X86RegisterInfo::getX86RegNum(BaseReg) != N86::ESP)) {
3145 if (BaseReg == 0) { // Just a displacement?
3146 // Emit special case [disp32] encoding
3148 FinalSize += getDisplacementFieldSize(DispForReloc);
3150 unsigned BaseRegNo = X86RegisterInfo::getX86RegNum(BaseReg);
3151 if (!DispForReloc && DispVal == 0 && BaseRegNo != N86::EBP) {
3152 // Emit simple indirect register encoding... [EAX] f.e.
3154 // Be pessimistic and assume it's a disp32, not a disp8
3156 // Emit the most general non-SIB encoding: [REG+disp32]
3158 FinalSize += getDisplacementFieldSize(DispForReloc);
3162 } else { // We need a SIB byte, so start by outputting the ModR/M byte first
3163 assert(IndexReg.getReg() != X86::ESP &&
3164 IndexReg.getReg() != X86::RSP && "Cannot use ESP as index reg!");
3166 bool ForceDisp32 = false;
3167 if (BaseReg == 0 || DispForReloc) {
3168 // Emit the normal disp32 encoding.
3175 FinalSize += sizeSIBByte();
3177 // Do we need to output a displacement?
3178 if (DispVal != 0 || ForceDisp32) {
3179 FinalSize += getDisplacementFieldSize(DispForReloc);
3186 static unsigned GetInstSizeWithDesc(const MachineInstr &MI,
3187 const TargetInstrDesc *Desc,
3188 bool IsPIC, bool Is64BitMode) {
3190 unsigned Opcode = Desc->Opcode;
3191 unsigned FinalSize = 0;
3193 // Emit the lock opcode prefix as needed.
3194 if (Desc->TSFlags & X86II::LOCK) ++FinalSize;
3196 // Emit segment override opcode prefix as needed.
3197 switch (Desc->TSFlags & X86II::SegOvrMask) {
3202 default: llvm_unreachable("Invalid segment!");
3203 case 0: break; // No segment override!
3206 // Emit the repeat opcode prefix as needed.
3207 if ((Desc->TSFlags & X86II::Op0Mask) == X86II::REP) ++FinalSize;
3209 // Emit the operand size opcode prefix as needed.
3210 if (Desc->TSFlags & X86II::OpSize) ++FinalSize;
3212 // Emit the address size opcode prefix as needed.
3213 if (Desc->TSFlags & X86II::AdSize) ++FinalSize;
3215 bool Need0FPrefix = false;
3216 switch (Desc->TSFlags & X86II::Op0Mask) {
3217 case X86II::TB: // Two-byte opcode prefix
3218 case X86II::T8: // 0F 38
3219 case X86II::TA: // 0F 3A
3220 Need0FPrefix = true;
3222 case X86II::TF: // F2 0F 38
3224 Need0FPrefix = true;
3226 case X86II::REP: break; // already handled.
3227 case X86II::XS: // F3 0F
3229 Need0FPrefix = true;
3231 case X86II::XD: // F2 0F
3233 Need0FPrefix = true;
3235 case X86II::D8: case X86II::D9: case X86II::DA: case X86II::DB:
3236 case X86II::DC: case X86II::DD: case X86II::DE: case X86II::DF:
3238 break; // Two-byte opcode prefix
3239 default: llvm_unreachable("Invalid prefix!");
3240 case 0: break; // No prefix!
3245 unsigned REX = X86InstrInfo::determineREX(MI);
3250 // 0x0F escape code must be emitted just before the opcode.
3254 switch (Desc->TSFlags & X86II::Op0Mask) {
3255 case X86II::T8: // 0F 38
3258 case X86II::TA: // 0F 3A
3261 case X86II::TF: // F2 0F 38
3266 // If this is a two-address instruction, skip one of the register operands.
3267 unsigned NumOps = Desc->getNumOperands();
3269 if (NumOps > 1 && Desc->getOperandConstraint(1, TOI::TIED_TO) != -1)
3271 else if (NumOps > 2 && Desc->getOperandConstraint(NumOps-1, TOI::TIED_TO)== 0)
3272 // Skip the last source operand that is tied_to the dest reg. e.g. LXADD32
3275 switch (Desc->TSFlags & X86II::FormMask) {
3276 default: llvm_unreachable("Unknown FormMask value in X86 MachineCodeEmitter!");
3278 // Remember the current PC offset, this is the PIC relocation
3283 case TargetOpcode::INLINEASM: {
3284 const MachineFunction *MF = MI.getParent()->getParent();
3285 const TargetInstrInfo &TII = *MF->getTarget().getInstrInfo();
3286 FinalSize += TII.getInlineAsmLength(MI.getOperand(0).getSymbolName(),
3287 *MF->getTarget().getMCAsmInfo());
3290 case TargetOpcode::PROLOG_LABEL:
3291 case TargetOpcode::EH_LABEL:
3292 case TargetOpcode::DBG_VALUE:
3294 case TargetOpcode::IMPLICIT_DEF:
3295 case TargetOpcode::KILL:
3297 case X86::MOVPC32r: {
3298 // This emits the "call" portion of this pseudo instruction.
3300 FinalSize += sizeConstant(X86II::getSizeOfImm(Desc->TSFlags));
3309 if (CurOp != NumOps) {
3310 const MachineOperand &MO = MI.getOperand(CurOp++);
3312 FinalSize += sizePCRelativeBlockAddress();
3313 } else if (MO.isGlobal()) {
3314 FinalSize += sizeGlobalAddress(false);
3315 } else if (MO.isSymbol()) {
3316 FinalSize += sizeExternalSymbolAddress(false);
3317 } else if (MO.isImm()) {
3318 FinalSize += sizeConstant(X86II::getSizeOfImm(Desc->TSFlags));
3320 llvm_unreachable("Unknown RawFrm operand!");
3325 case X86II::AddRegFrm:
3329 if (CurOp != NumOps) {
3330 const MachineOperand &MO1 = MI.getOperand(CurOp++);
3331 unsigned Size = X86II::getSizeOfImm(Desc->TSFlags);
3333 FinalSize += sizeConstant(Size);
3336 if (Opcode == X86::MOV64ri)
3338 if (MO1.isGlobal()) {
3339 FinalSize += sizeGlobalAddress(dword);
3340 } else if (MO1.isSymbol())
3341 FinalSize += sizeExternalSymbolAddress(dword);
3342 else if (MO1.isCPI())
3343 FinalSize += sizeConstPoolAddress(dword);
3344 else if (MO1.isJTI())
3345 FinalSize += sizeJumpTableAddress(dword);
3350 case X86II::MRMDestReg: {
3352 FinalSize += sizeRegModRMByte();
3354 if (CurOp != NumOps) {
3356 FinalSize += sizeConstant(X86II::getSizeOfImm(Desc->TSFlags));
3360 case X86II::MRMDestMem: {
3362 FinalSize += getMemModRMByteSize(MI, CurOp, IsPIC, Is64BitMode);
3363 CurOp += X86::AddrNumOperands + 1;
3364 if (CurOp != NumOps) {
3366 FinalSize += sizeConstant(X86II::getSizeOfImm(Desc->TSFlags));
3371 case X86II::MRMSrcReg:
3373 FinalSize += sizeRegModRMByte();
3375 if (CurOp != NumOps) {
3377 FinalSize += sizeConstant(X86II::getSizeOfImm(Desc->TSFlags));
3381 case X86II::MRMSrcMem: {
3383 FinalSize += getMemModRMByteSize(MI, CurOp+1, IsPIC, Is64BitMode);
3384 CurOp += X86::AddrNumOperands + 1;
3385 if (CurOp != NumOps) {
3387 FinalSize += sizeConstant(X86II::getSizeOfImm(Desc->TSFlags));
3392 case X86II::MRM0r: case X86II::MRM1r:
3393 case X86II::MRM2r: case X86II::MRM3r:
3394 case X86II::MRM4r: case X86II::MRM5r:
3395 case X86II::MRM6r: case X86II::MRM7r:
3397 if (Desc->getOpcode() == X86::LFENCE ||
3398 Desc->getOpcode() == X86::MFENCE) {
3399 // Special handling of lfence and mfence;
3400 FinalSize += sizeRegModRMByte();
3401 } else if (Desc->getOpcode() == X86::MONITOR ||
3402 Desc->getOpcode() == X86::MWAIT) {
3403 // Special handling of monitor and mwait.
3404 FinalSize += sizeRegModRMByte() + 1; // +1 for the opcode.
3407 FinalSize += sizeRegModRMByte();
3410 if (CurOp != NumOps) {
3411 const MachineOperand &MO1 = MI.getOperand(CurOp++);
3412 unsigned Size = X86II::getSizeOfImm(Desc->TSFlags);
3414 FinalSize += sizeConstant(Size);
3417 if (Opcode == X86::MOV64ri32)
3419 if (MO1.isGlobal()) {
3420 FinalSize += sizeGlobalAddress(dword);
3421 } else if (MO1.isSymbol())
3422 FinalSize += sizeExternalSymbolAddress(dword);
3423 else if (MO1.isCPI())
3424 FinalSize += sizeConstPoolAddress(dword);
3425 else if (MO1.isJTI())
3426 FinalSize += sizeJumpTableAddress(dword);
3431 case X86II::MRM0m: case X86II::MRM1m:
3432 case X86II::MRM2m: case X86II::MRM3m:
3433 case X86II::MRM4m: case X86II::MRM5m:
3434 case X86II::MRM6m: case X86II::MRM7m: {
3437 FinalSize += getMemModRMByteSize(MI, CurOp, IsPIC, Is64BitMode);
3438 CurOp += X86::AddrNumOperands;
3440 if (CurOp != NumOps) {
3441 const MachineOperand &MO = MI.getOperand(CurOp++);
3442 unsigned Size = X86II::getSizeOfImm(Desc->TSFlags);
3444 FinalSize += sizeConstant(Size);
3447 if (Opcode == X86::MOV64mi32)
3449 if (MO.isGlobal()) {
3450 FinalSize += sizeGlobalAddress(dword);
3451 } else if (MO.isSymbol())
3452 FinalSize += sizeExternalSymbolAddress(dword);
3453 else if (MO.isCPI())
3454 FinalSize += sizeConstPoolAddress(dword);
3455 else if (MO.isJTI())
3456 FinalSize += sizeJumpTableAddress(dword);
3470 case X86II::MRMInitReg:
3472 // Duplicate register, used by things like MOV8r0 (aka xor reg,reg).
3473 FinalSize += sizeRegModRMByte();
3478 if (!Desc->isVariadic() && CurOp != NumOps) {
3480 raw_string_ostream Msg(msg);
3481 Msg << "Cannot determine size: " << MI;
3482 report_fatal_error(Msg.str());
3490 unsigned X86InstrInfo::GetInstSizeInBytes(const MachineInstr *MI) const {
3491 const TargetInstrDesc &Desc = MI->getDesc();
3492 bool IsPIC = TM.getRelocationModel() == Reloc::PIC_;
3493 bool Is64BitMode = TM.getSubtargetImpl()->is64Bit();
3494 unsigned Size = GetInstSizeWithDesc(*MI, &Desc, IsPIC, Is64BitMode);
3495 if (Desc.getOpcode() == X86::MOVPC32r)
3496 Size += GetInstSizeWithDesc(*MI, &get(X86::POP32r), IsPIC, Is64BitMode);
3500 /// getGlobalBaseReg - Return a virtual register initialized with the
3501 /// the global base register value. Output instructions required to
3502 /// initialize the register in the function entry block, if necessary.
3504 /// TODO: Eliminate this and move the code to X86MachineFunctionInfo.
3506 unsigned X86InstrInfo::getGlobalBaseReg(MachineFunction *MF) const {
3507 assert(!TM.getSubtarget<X86Subtarget>().is64Bit() &&
3508 "X86-64 PIC uses RIP relative addressing");
3510 X86MachineFunctionInfo *X86FI = MF->getInfo<X86MachineFunctionInfo>();
3511 unsigned GlobalBaseReg = X86FI->getGlobalBaseReg();
3512 if (GlobalBaseReg != 0)
3513 return GlobalBaseReg;
3515 // Create the register. The code to initialize it is inserted
3516 // later, by the CGBR pass (below).
3517 MachineRegisterInfo &RegInfo = MF->getRegInfo();
3518 GlobalBaseReg = RegInfo.createVirtualRegister(X86::GR32RegisterClass);
3519 X86FI->setGlobalBaseReg(GlobalBaseReg);
3520 return GlobalBaseReg;
3523 // These are the replaceable SSE instructions. Some of these have Int variants
3524 // that we don't include here. We don't want to replace instructions selected
3526 static const unsigned ReplaceableInstrs[][3] = {
3527 //PackedInt PackedSingle PackedDouble
3528 { X86::MOVAPSmr, X86::MOVAPDmr, X86::MOVDQAmr },
3529 { X86::MOVAPSrm, X86::MOVAPDrm, X86::MOVDQArm },
3530 { X86::MOVAPSrr, X86::MOVAPDrr, X86::MOVDQArr },
3531 { X86::MOVUPSmr, X86::MOVUPDmr, X86::MOVDQUmr },
3532 { X86::MOVUPSrm, X86::MOVUPDrm, X86::MOVDQUrm },
3533 { X86::MOVNTPSmr, X86::MOVNTPDmr, X86::MOVNTDQmr },
3534 { X86::ANDNPSrm, X86::ANDNPDrm, X86::PANDNrm },
3535 { X86::ANDNPSrr, X86::ANDNPDrr, X86::PANDNrr },
3536 { X86::ANDPSrm, X86::ANDPDrm, X86::PANDrm },
3537 { X86::ANDPSrr, X86::ANDPDrr, X86::PANDrr },
3538 { X86::ORPSrm, X86::ORPDrm, X86::PORrm },
3539 { X86::ORPSrr, X86::ORPDrr, X86::PORrr },
3540 { X86::V_SET0PS, X86::V_SET0PD, X86::V_SET0PI },
3541 { X86::XORPSrm, X86::XORPDrm, X86::PXORrm },
3542 { X86::XORPSrr, X86::XORPDrr, X86::PXORrr },
3545 // FIXME: Some shuffle and unpack instructions have equivalents in different
3546 // domains, but they require a bit more work than just switching opcodes.
3548 static const unsigned *lookup(unsigned opcode, unsigned domain) {
3549 for (unsigned i = 0, e = array_lengthof(ReplaceableInstrs); i != e; ++i)
3550 if (ReplaceableInstrs[i][domain-1] == opcode)
3551 return ReplaceableInstrs[i];
3555 std::pair<uint16_t, uint16_t>
3556 X86InstrInfo::GetSSEDomain(const MachineInstr *MI) const {
3557 uint16_t domain = (MI->getDesc().TSFlags >> X86II::SSEDomainShift) & 3;
3558 return std::make_pair(domain,
3559 domain && lookup(MI->getOpcode(), domain) ? 0xe : 0);
3562 void X86InstrInfo::SetSSEDomain(MachineInstr *MI, unsigned Domain) const {
3563 assert(Domain>0 && Domain<4 && "Invalid execution domain");
3564 uint16_t dom = (MI->getDesc().TSFlags >> X86II::SSEDomainShift) & 3;
3565 assert(dom && "Not an SSE instruction");
3566 const unsigned *table = lookup(MI->getOpcode(), dom);
3567 assert(table && "Cannot change domain");
3568 MI->setDesc(get(table[Domain-1]));
3571 /// getNoopForMachoTarget - Return the noop instruction to use for a noop.
3572 void X86InstrInfo::getNoopForMachoTarget(MCInst &NopInst) const {
3573 NopInst.setOpcode(X86::NOOP);
3577 /// CGBR - Create Global Base Reg pass. This initializes the PIC
3578 /// global base register for x86-32.
3579 struct CGBR : public MachineFunctionPass {
3581 CGBR() : MachineFunctionPass(&ID) {}
3583 virtual bool runOnMachineFunction(MachineFunction &MF) {
3584 const X86TargetMachine *TM =
3585 static_cast<const X86TargetMachine *>(&MF.getTarget());
3587 assert(!TM->getSubtarget<X86Subtarget>().is64Bit() &&
3588 "X86-64 PIC uses RIP relative addressing");
3590 // Only emit a global base reg in PIC mode.
3591 if (TM->getRelocationModel() != Reloc::PIC_)
3594 // Insert the set of GlobalBaseReg into the first MBB of the function
3595 MachineBasicBlock &FirstMBB = MF.front();
3596 MachineBasicBlock::iterator MBBI = FirstMBB.begin();
3597 DebugLoc DL = FirstMBB.findDebugLoc(MBBI);
3598 MachineRegisterInfo &RegInfo = MF.getRegInfo();
3599 const X86InstrInfo *TII = TM->getInstrInfo();
3602 if (TM->getSubtarget<X86Subtarget>().isPICStyleGOT())
3603 PC = RegInfo.createVirtualRegister(X86::GR32RegisterClass);
3605 PC = TII->getGlobalBaseReg(&MF);
3607 // Operand of MovePCtoStack is completely ignored by asm printer. It's
3608 // only used in JIT code emission as displacement to pc.
3609 BuildMI(FirstMBB, MBBI, DL, TII->get(X86::MOVPC32r), PC).addImm(0);
3611 // If we're using vanilla 'GOT' PIC style, we should use relative addressing
3612 // not to pc, but to _GLOBAL_OFFSET_TABLE_ external.
3613 if (TM->getSubtarget<X86Subtarget>().isPICStyleGOT()) {
3614 unsigned GlobalBaseReg = TII->getGlobalBaseReg(&MF);
3615 // Generate addl $__GLOBAL_OFFSET_TABLE_ + [.-piclabel], %some_register
3616 BuildMI(FirstMBB, MBBI, DL, TII->get(X86::ADD32ri), GlobalBaseReg)
3617 .addReg(PC).addExternalSymbol("_GLOBAL_OFFSET_TABLE_",
3618 X86II::MO_GOT_ABSOLUTE_ADDRESS);
3624 virtual const char *getPassName() const {
3625 return "X86 PIC Global Base Reg Initialization";
3628 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
3629 AU.setPreservesCFG();
3630 MachineFunctionPass::getAnalysisUsage(AU);
3637 llvm::createGlobalBaseRegPass() { return new CGBR(); }