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/ADT/STLExtras.h"
22 #include "llvm/CodeGen/MachineFrameInfo.h"
23 #include "llvm/CodeGen/MachineInstrBuilder.h"
24 #include "llvm/CodeGen/MachineRegisterInfo.h"
25 #include "llvm/CodeGen/LiveVariables.h"
26 #include "llvm/Support/CommandLine.h"
27 #include "llvm/Target/TargetOptions.h"
33 NoFusing("disable-spill-fusing",
34 cl::desc("Disable fusing of spill code into instructions"));
36 PrintFailedFusing("print-failed-fuse-candidates",
37 cl::desc("Print instructions that the allocator wants to"
38 " fuse, but the X86 backend currently can't"),
41 ReMatPICLoad("remat-pic-load",
42 cl::desc("Allow rematerializing pic load"),
43 cl::init(true), cl::Hidden);
46 X86InstrInfo::X86InstrInfo(X86TargetMachine &tm)
47 : TargetInstrInfoImpl(X86Insts, array_lengthof(X86Insts)),
48 TM(tm), RI(tm, *this) {
49 SmallVector<unsigned,16> AmbEntries;
50 static const unsigned OpTbl2Addr[][2] = {
51 { X86::ADC32ri, X86::ADC32mi },
52 { X86::ADC32ri8, X86::ADC32mi8 },
53 { X86::ADC32rr, X86::ADC32mr },
54 { X86::ADC64ri32, X86::ADC64mi32 },
55 { X86::ADC64ri8, X86::ADC64mi8 },
56 { X86::ADC64rr, X86::ADC64mr },
57 { X86::ADD16ri, X86::ADD16mi },
58 { X86::ADD16ri8, X86::ADD16mi8 },
59 { X86::ADD16rr, X86::ADD16mr },
60 { X86::ADD32ri, X86::ADD32mi },
61 { X86::ADD32ri8, X86::ADD32mi8 },
62 { X86::ADD32rr, X86::ADD32mr },
63 { X86::ADD64ri32, X86::ADD64mi32 },
64 { X86::ADD64ri8, X86::ADD64mi8 },
65 { X86::ADD64rr, X86::ADD64mr },
66 { X86::ADD8ri, X86::ADD8mi },
67 { X86::ADD8rr, X86::ADD8mr },
68 { X86::AND16ri, X86::AND16mi },
69 { X86::AND16ri8, X86::AND16mi8 },
70 { X86::AND16rr, X86::AND16mr },
71 { X86::AND32ri, X86::AND32mi },
72 { X86::AND32ri8, X86::AND32mi8 },
73 { X86::AND32rr, X86::AND32mr },
74 { X86::AND64ri32, X86::AND64mi32 },
75 { X86::AND64ri8, X86::AND64mi8 },
76 { X86::AND64rr, X86::AND64mr },
77 { X86::AND8ri, X86::AND8mi },
78 { X86::AND8rr, X86::AND8mr },
79 { X86::DEC16r, X86::DEC16m },
80 { X86::DEC32r, X86::DEC32m },
81 { X86::DEC64_16r, X86::DEC64_16m },
82 { X86::DEC64_32r, X86::DEC64_32m },
83 { X86::DEC64r, X86::DEC64m },
84 { X86::DEC8r, X86::DEC8m },
85 { X86::INC16r, X86::INC16m },
86 { X86::INC32r, X86::INC32m },
87 { X86::INC64_16r, X86::INC64_16m },
88 { X86::INC64_32r, X86::INC64_32m },
89 { X86::INC64r, X86::INC64m },
90 { X86::INC8r, X86::INC8m },
91 { X86::NEG16r, X86::NEG16m },
92 { X86::NEG32r, X86::NEG32m },
93 { X86::NEG64r, X86::NEG64m },
94 { X86::NEG8r, X86::NEG8m },
95 { X86::NOT16r, X86::NOT16m },
96 { X86::NOT32r, X86::NOT32m },
97 { X86::NOT64r, X86::NOT64m },
98 { X86::NOT8r, X86::NOT8m },
99 { X86::OR16ri, X86::OR16mi },
100 { X86::OR16ri8, X86::OR16mi8 },
101 { X86::OR16rr, X86::OR16mr },
102 { X86::OR32ri, X86::OR32mi },
103 { X86::OR32ri8, X86::OR32mi8 },
104 { X86::OR32rr, X86::OR32mr },
105 { X86::OR64ri32, X86::OR64mi32 },
106 { X86::OR64ri8, X86::OR64mi8 },
107 { X86::OR64rr, X86::OR64mr },
108 { X86::OR8ri, X86::OR8mi },
109 { X86::OR8rr, X86::OR8mr },
110 { X86::ROL16r1, X86::ROL16m1 },
111 { X86::ROL16rCL, X86::ROL16mCL },
112 { X86::ROL16ri, X86::ROL16mi },
113 { X86::ROL32r1, X86::ROL32m1 },
114 { X86::ROL32rCL, X86::ROL32mCL },
115 { X86::ROL32ri, X86::ROL32mi },
116 { X86::ROL64r1, X86::ROL64m1 },
117 { X86::ROL64rCL, X86::ROL64mCL },
118 { X86::ROL64ri, X86::ROL64mi },
119 { X86::ROL8r1, X86::ROL8m1 },
120 { X86::ROL8rCL, X86::ROL8mCL },
121 { X86::ROL8ri, X86::ROL8mi },
122 { X86::ROR16r1, X86::ROR16m1 },
123 { X86::ROR16rCL, X86::ROR16mCL },
124 { X86::ROR16ri, X86::ROR16mi },
125 { X86::ROR32r1, X86::ROR32m1 },
126 { X86::ROR32rCL, X86::ROR32mCL },
127 { X86::ROR32ri, X86::ROR32mi },
128 { X86::ROR64r1, X86::ROR64m1 },
129 { X86::ROR64rCL, X86::ROR64mCL },
130 { X86::ROR64ri, X86::ROR64mi },
131 { X86::ROR8r1, X86::ROR8m1 },
132 { X86::ROR8rCL, X86::ROR8mCL },
133 { X86::ROR8ri, X86::ROR8mi },
134 { X86::SAR16r1, X86::SAR16m1 },
135 { X86::SAR16rCL, X86::SAR16mCL },
136 { X86::SAR16ri, X86::SAR16mi },
137 { X86::SAR32r1, X86::SAR32m1 },
138 { X86::SAR32rCL, X86::SAR32mCL },
139 { X86::SAR32ri, X86::SAR32mi },
140 { X86::SAR64r1, X86::SAR64m1 },
141 { X86::SAR64rCL, X86::SAR64mCL },
142 { X86::SAR64ri, X86::SAR64mi },
143 { X86::SAR8r1, X86::SAR8m1 },
144 { X86::SAR8rCL, X86::SAR8mCL },
145 { X86::SAR8ri, X86::SAR8mi },
146 { X86::SBB32ri, X86::SBB32mi },
147 { X86::SBB32ri8, X86::SBB32mi8 },
148 { X86::SBB32rr, X86::SBB32mr },
149 { X86::SBB64ri32, X86::SBB64mi32 },
150 { X86::SBB64ri8, X86::SBB64mi8 },
151 { X86::SBB64rr, X86::SBB64mr },
152 { X86::SHL16rCL, X86::SHL16mCL },
153 { X86::SHL16ri, X86::SHL16mi },
154 { X86::SHL32rCL, X86::SHL32mCL },
155 { X86::SHL32ri, X86::SHL32mi },
156 { X86::SHL64rCL, X86::SHL64mCL },
157 { X86::SHL64ri, X86::SHL64mi },
158 { X86::SHL8rCL, X86::SHL8mCL },
159 { X86::SHL8ri, X86::SHL8mi },
160 { X86::SHLD16rrCL, X86::SHLD16mrCL },
161 { X86::SHLD16rri8, X86::SHLD16mri8 },
162 { X86::SHLD32rrCL, X86::SHLD32mrCL },
163 { X86::SHLD32rri8, X86::SHLD32mri8 },
164 { X86::SHLD64rrCL, X86::SHLD64mrCL },
165 { X86::SHLD64rri8, X86::SHLD64mri8 },
166 { X86::SHR16r1, X86::SHR16m1 },
167 { X86::SHR16rCL, X86::SHR16mCL },
168 { X86::SHR16ri, X86::SHR16mi },
169 { X86::SHR32r1, X86::SHR32m1 },
170 { X86::SHR32rCL, X86::SHR32mCL },
171 { X86::SHR32ri, X86::SHR32mi },
172 { X86::SHR64r1, X86::SHR64m1 },
173 { X86::SHR64rCL, X86::SHR64mCL },
174 { X86::SHR64ri, X86::SHR64mi },
175 { X86::SHR8r1, X86::SHR8m1 },
176 { X86::SHR8rCL, X86::SHR8mCL },
177 { X86::SHR8ri, X86::SHR8mi },
178 { X86::SHRD16rrCL, X86::SHRD16mrCL },
179 { X86::SHRD16rri8, X86::SHRD16mri8 },
180 { X86::SHRD32rrCL, X86::SHRD32mrCL },
181 { X86::SHRD32rri8, X86::SHRD32mri8 },
182 { X86::SHRD64rrCL, X86::SHRD64mrCL },
183 { X86::SHRD64rri8, X86::SHRD64mri8 },
184 { X86::SUB16ri, X86::SUB16mi },
185 { X86::SUB16ri8, X86::SUB16mi8 },
186 { X86::SUB16rr, X86::SUB16mr },
187 { X86::SUB32ri, X86::SUB32mi },
188 { X86::SUB32ri8, X86::SUB32mi8 },
189 { X86::SUB32rr, X86::SUB32mr },
190 { X86::SUB64ri32, X86::SUB64mi32 },
191 { X86::SUB64ri8, X86::SUB64mi8 },
192 { X86::SUB64rr, X86::SUB64mr },
193 { X86::SUB8ri, X86::SUB8mi },
194 { X86::SUB8rr, X86::SUB8mr },
195 { X86::XOR16ri, X86::XOR16mi },
196 { X86::XOR16ri8, X86::XOR16mi8 },
197 { X86::XOR16rr, X86::XOR16mr },
198 { X86::XOR32ri, X86::XOR32mi },
199 { X86::XOR32ri8, X86::XOR32mi8 },
200 { X86::XOR32rr, X86::XOR32mr },
201 { X86::XOR64ri32, X86::XOR64mi32 },
202 { X86::XOR64ri8, X86::XOR64mi8 },
203 { X86::XOR64rr, X86::XOR64mr },
204 { X86::XOR8ri, X86::XOR8mi },
205 { X86::XOR8rr, X86::XOR8mr }
208 for (unsigned i = 0, e = array_lengthof(OpTbl2Addr); i != e; ++i) {
209 unsigned RegOp = OpTbl2Addr[i][0];
210 unsigned MemOp = OpTbl2Addr[i][1];
211 if (!RegOp2MemOpTable2Addr.insert(std::make_pair((unsigned*)RegOp, MemOp)))
212 assert(false && "Duplicated entries?");
213 unsigned AuxInfo = 0 | (1 << 4) | (1 << 5); // Index 0,folded load and store
214 if (!MemOp2RegOpTable.insert(std::make_pair((unsigned*)MemOp,
215 std::make_pair(RegOp, AuxInfo))))
216 AmbEntries.push_back(MemOp);
219 // If the third value is 1, then it's folding either a load or a store.
220 static const unsigned OpTbl0[][3] = {
221 { X86::CALL32r, X86::CALL32m, 1 },
222 { X86::CALL64r, X86::CALL64m, 1 },
223 { X86::CMP16ri, X86::CMP16mi, 1 },
224 { X86::CMP16ri8, X86::CMP16mi8, 1 },
225 { X86::CMP32ri, X86::CMP32mi, 1 },
226 { X86::CMP32ri8, X86::CMP32mi8, 1 },
227 { X86::CMP64ri32, X86::CMP64mi32, 1 },
228 { X86::CMP64ri8, X86::CMP64mi8, 1 },
229 { X86::CMP8ri, X86::CMP8mi, 1 },
230 { X86::DIV16r, X86::DIV16m, 1 },
231 { X86::DIV32r, X86::DIV32m, 1 },
232 { X86::DIV64r, X86::DIV64m, 1 },
233 { X86::DIV8r, X86::DIV8m, 1 },
234 { X86::FsMOVAPDrr, X86::MOVSDmr, 0 },
235 { X86::FsMOVAPSrr, X86::MOVSSmr, 0 },
236 { X86::IDIV16r, X86::IDIV16m, 1 },
237 { X86::IDIV32r, X86::IDIV32m, 1 },
238 { X86::IDIV64r, X86::IDIV64m, 1 },
239 { X86::IDIV8r, X86::IDIV8m, 1 },
240 { X86::IMUL16r, X86::IMUL16m, 1 },
241 { X86::IMUL32r, X86::IMUL32m, 1 },
242 { X86::IMUL64r, X86::IMUL64m, 1 },
243 { X86::IMUL8r, X86::IMUL8m, 1 },
244 { X86::JMP32r, X86::JMP32m, 1 },
245 { X86::JMP64r, X86::JMP64m, 1 },
246 { X86::MOV16ri, X86::MOV16mi, 0 },
247 { X86::MOV16rr, X86::MOV16mr, 0 },
248 { X86::MOV16to16_, X86::MOV16_mr, 0 },
249 { X86::MOV32ri, X86::MOV32mi, 0 },
250 { X86::MOV32rr, X86::MOV32mr, 0 },
251 { X86::MOV32to32_, X86::MOV32_mr, 0 },
252 { X86::MOV64ri32, X86::MOV64mi32, 0 },
253 { X86::MOV64rr, X86::MOV64mr, 0 },
254 { X86::MOV8ri, X86::MOV8mi, 0 },
255 { X86::MOV8rr, X86::MOV8mr, 0 },
256 { X86::MOVAPDrr, X86::MOVAPDmr, 0 },
257 { X86::MOVAPSrr, X86::MOVAPSmr, 0 },
258 { X86::MOVPDI2DIrr, X86::MOVPDI2DImr, 0 },
259 { X86::MOVPQIto64rr,X86::MOVPQI2QImr, 0 },
260 { X86::MOVPS2SSrr, X86::MOVPS2SSmr, 0 },
261 { X86::MOVSDrr, X86::MOVSDmr, 0 },
262 { X86::MOVSDto64rr, X86::MOVSDto64mr, 0 },
263 { X86::MOVSS2DIrr, X86::MOVSS2DImr, 0 },
264 { X86::MOVSSrr, X86::MOVSSmr, 0 },
265 { X86::MOVUPDrr, X86::MOVUPDmr, 0 },
266 { X86::MOVUPSrr, X86::MOVUPSmr, 0 },
267 { X86::MUL16r, X86::MUL16m, 1 },
268 { X86::MUL32r, X86::MUL32m, 1 },
269 { X86::MUL64r, X86::MUL64m, 1 },
270 { X86::MUL8r, X86::MUL8m, 1 },
271 { X86::SETAEr, X86::SETAEm, 0 },
272 { X86::SETAr, X86::SETAm, 0 },
273 { X86::SETBEr, X86::SETBEm, 0 },
274 { X86::SETBr, X86::SETBm, 0 },
275 { X86::SETEr, X86::SETEm, 0 },
276 { X86::SETGEr, X86::SETGEm, 0 },
277 { X86::SETGr, X86::SETGm, 0 },
278 { X86::SETLEr, X86::SETLEm, 0 },
279 { X86::SETLr, X86::SETLm, 0 },
280 { X86::SETNEr, X86::SETNEm, 0 },
281 { X86::SETNPr, X86::SETNPm, 0 },
282 { X86::SETNSr, X86::SETNSm, 0 },
283 { X86::SETPr, X86::SETPm, 0 },
284 { X86::SETSr, X86::SETSm, 0 },
285 { X86::TAILJMPr, X86::TAILJMPm, 1 },
286 { X86::TEST16ri, X86::TEST16mi, 1 },
287 { X86::TEST32ri, X86::TEST32mi, 1 },
288 { X86::TEST64ri32, X86::TEST64mi32, 1 },
289 { X86::TEST8ri, X86::TEST8mi, 1 }
292 for (unsigned i = 0, e = array_lengthof(OpTbl0); i != e; ++i) {
293 unsigned RegOp = OpTbl0[i][0];
294 unsigned MemOp = OpTbl0[i][1];
295 if (!RegOp2MemOpTable0.insert(std::make_pair((unsigned*)RegOp, MemOp)))
296 assert(false && "Duplicated entries?");
297 unsigned FoldedLoad = OpTbl0[i][2];
298 // Index 0, folded load or store.
299 unsigned AuxInfo = 0 | (FoldedLoad << 4) | ((FoldedLoad^1) << 5);
300 if (RegOp != X86::FsMOVAPDrr && RegOp != X86::FsMOVAPSrr)
301 if (!MemOp2RegOpTable.insert(std::make_pair((unsigned*)MemOp,
302 std::make_pair(RegOp, AuxInfo))))
303 AmbEntries.push_back(MemOp);
306 static const unsigned OpTbl1[][2] = {
307 { X86::CMP16rr, X86::CMP16rm },
308 { X86::CMP32rr, X86::CMP32rm },
309 { X86::CMP64rr, X86::CMP64rm },
310 { X86::CMP8rr, X86::CMP8rm },
311 { X86::CVTSD2SSrr, X86::CVTSD2SSrm },
312 { X86::CVTSI2SD64rr, X86::CVTSI2SD64rm },
313 { X86::CVTSI2SDrr, X86::CVTSI2SDrm },
314 { X86::CVTSI2SS64rr, X86::CVTSI2SS64rm },
315 { X86::CVTSI2SSrr, X86::CVTSI2SSrm },
316 { X86::CVTSS2SDrr, X86::CVTSS2SDrm },
317 { X86::CVTTSD2SI64rr, X86::CVTTSD2SI64rm },
318 { X86::CVTTSD2SIrr, X86::CVTTSD2SIrm },
319 { X86::CVTTSS2SI64rr, X86::CVTTSS2SI64rm },
320 { X86::CVTTSS2SIrr, X86::CVTTSS2SIrm },
321 { X86::FsMOVAPDrr, X86::MOVSDrm },
322 { X86::FsMOVAPSrr, X86::MOVSSrm },
323 { X86::IMUL16rri, X86::IMUL16rmi },
324 { X86::IMUL16rri8, X86::IMUL16rmi8 },
325 { X86::IMUL32rri, X86::IMUL32rmi },
326 { X86::IMUL32rri8, X86::IMUL32rmi8 },
327 { X86::IMUL64rri32, X86::IMUL64rmi32 },
328 { X86::IMUL64rri8, X86::IMUL64rmi8 },
329 { X86::Int_CMPSDrr, X86::Int_CMPSDrm },
330 { X86::Int_CMPSSrr, X86::Int_CMPSSrm },
331 { X86::Int_COMISDrr, X86::Int_COMISDrm },
332 { X86::Int_COMISSrr, X86::Int_COMISSrm },
333 { X86::Int_CVTDQ2PDrr, X86::Int_CVTDQ2PDrm },
334 { X86::Int_CVTDQ2PSrr, X86::Int_CVTDQ2PSrm },
335 { X86::Int_CVTPD2DQrr, X86::Int_CVTPD2DQrm },
336 { X86::Int_CVTPD2PSrr, X86::Int_CVTPD2PSrm },
337 { X86::Int_CVTPS2DQrr, X86::Int_CVTPS2DQrm },
338 { X86::Int_CVTPS2PDrr, X86::Int_CVTPS2PDrm },
339 { X86::Int_CVTSD2SI64rr,X86::Int_CVTSD2SI64rm },
340 { X86::Int_CVTSD2SIrr, X86::Int_CVTSD2SIrm },
341 { X86::Int_CVTSD2SSrr, X86::Int_CVTSD2SSrm },
342 { X86::Int_CVTSI2SD64rr,X86::Int_CVTSI2SD64rm },
343 { X86::Int_CVTSI2SDrr, X86::Int_CVTSI2SDrm },
344 { X86::Int_CVTSI2SS64rr,X86::Int_CVTSI2SS64rm },
345 { X86::Int_CVTSI2SSrr, X86::Int_CVTSI2SSrm },
346 { X86::Int_CVTSS2SDrr, X86::Int_CVTSS2SDrm },
347 { X86::Int_CVTSS2SI64rr,X86::Int_CVTSS2SI64rm },
348 { X86::Int_CVTSS2SIrr, X86::Int_CVTSS2SIrm },
349 { X86::Int_CVTTPD2DQrr, X86::Int_CVTTPD2DQrm },
350 { X86::Int_CVTTPS2DQrr, X86::Int_CVTTPS2DQrm },
351 { X86::Int_CVTTSD2SI64rr,X86::Int_CVTTSD2SI64rm },
352 { X86::Int_CVTTSD2SIrr, X86::Int_CVTTSD2SIrm },
353 { X86::Int_CVTTSS2SI64rr,X86::Int_CVTTSS2SI64rm },
354 { X86::Int_CVTTSS2SIrr, X86::Int_CVTTSS2SIrm },
355 { X86::Int_UCOMISDrr, X86::Int_UCOMISDrm },
356 { X86::Int_UCOMISSrr, X86::Int_UCOMISSrm },
357 { X86::MOV16rr, X86::MOV16rm },
358 { X86::MOV16to16_, X86::MOV16_rm },
359 { X86::MOV32rr, X86::MOV32rm },
360 { X86::MOV32to32_, X86::MOV32_rm },
361 { X86::MOV64rr, X86::MOV64rm },
362 { X86::MOV64toPQIrr, X86::MOVQI2PQIrm },
363 { X86::MOV64toSDrr, X86::MOV64toSDrm },
364 { X86::MOV8rr, X86::MOV8rm },
365 { X86::MOVAPDrr, X86::MOVAPDrm },
366 { X86::MOVAPSrr, X86::MOVAPSrm },
367 { X86::MOVDDUPrr, X86::MOVDDUPrm },
368 { X86::MOVDI2PDIrr, X86::MOVDI2PDIrm },
369 { X86::MOVDI2SSrr, X86::MOVDI2SSrm },
370 { X86::MOVSD2PDrr, X86::MOVSD2PDrm },
371 { X86::MOVSDrr, X86::MOVSDrm },
372 { X86::MOVSHDUPrr, X86::MOVSHDUPrm },
373 { X86::MOVSLDUPrr, X86::MOVSLDUPrm },
374 { X86::MOVSS2PSrr, X86::MOVSS2PSrm },
375 { X86::MOVSSrr, X86::MOVSSrm },
376 { X86::MOVSX16rr8, X86::MOVSX16rm8 },
377 { X86::MOVSX32rr16, X86::MOVSX32rm16 },
378 { X86::MOVSX32rr8, X86::MOVSX32rm8 },
379 { X86::MOVSX64rr16, X86::MOVSX64rm16 },
380 { X86::MOVSX64rr32, X86::MOVSX64rm32 },
381 { X86::MOVSX64rr8, X86::MOVSX64rm8 },
382 { X86::MOVUPDrr, X86::MOVUPDrm },
383 { X86::MOVUPSrr, X86::MOVUPSrm },
384 { X86::MOVZDI2PDIrr, X86::MOVZDI2PDIrm },
385 { X86::MOVZQI2PQIrr, X86::MOVZQI2PQIrm },
386 { X86::MOVZPQILo2PQIrr, X86::MOVZPQILo2PQIrm },
387 { X86::MOVZX16rr8, X86::MOVZX16rm8 },
388 { X86::MOVZX32rr16, X86::MOVZX32rm16 },
389 { X86::MOVZX32rr8, X86::MOVZX32rm8 },
390 { X86::MOVZX64rr16, X86::MOVZX64rm16 },
391 { X86::MOVZX64rr8, X86::MOVZX64rm8 },
392 { X86::PSHUFDri, X86::PSHUFDmi },
393 { X86::PSHUFHWri, X86::PSHUFHWmi },
394 { X86::PSHUFLWri, X86::PSHUFLWmi },
395 { X86::PsMOVZX64rr32, X86::PsMOVZX64rm32 },
396 { X86::RCPPSr, X86::RCPPSm },
397 { X86::RCPPSr_Int, X86::RCPPSm_Int },
398 { X86::RSQRTPSr, X86::RSQRTPSm },
399 { X86::RSQRTPSr_Int, X86::RSQRTPSm_Int },
400 { X86::RSQRTSSr, X86::RSQRTSSm },
401 { X86::RSQRTSSr_Int, X86::RSQRTSSm_Int },
402 { X86::SQRTPDr, X86::SQRTPDm },
403 { X86::SQRTPDr_Int, X86::SQRTPDm_Int },
404 { X86::SQRTPSr, X86::SQRTPSm },
405 { X86::SQRTPSr_Int, X86::SQRTPSm_Int },
406 { X86::SQRTSDr, X86::SQRTSDm },
407 { X86::SQRTSDr_Int, X86::SQRTSDm_Int },
408 { X86::SQRTSSr, X86::SQRTSSm },
409 { X86::SQRTSSr_Int, X86::SQRTSSm_Int },
410 { X86::TEST16rr, X86::TEST16rm },
411 { X86::TEST32rr, X86::TEST32rm },
412 { X86::TEST64rr, X86::TEST64rm },
413 { X86::TEST8rr, X86::TEST8rm },
414 // FIXME: TEST*rr EAX,EAX ---> CMP [mem], 0
415 { X86::UCOMISDrr, X86::UCOMISDrm },
416 { X86::UCOMISSrr, X86::UCOMISSrm }
419 for (unsigned i = 0, e = array_lengthof(OpTbl1); i != e; ++i) {
420 unsigned RegOp = OpTbl1[i][0];
421 unsigned MemOp = OpTbl1[i][1];
422 if (!RegOp2MemOpTable1.insert(std::make_pair((unsigned*)RegOp, MemOp)))
423 assert(false && "Duplicated entries?");
424 unsigned AuxInfo = 1 | (1 << 4); // Index 1, folded load
425 if (RegOp != X86::FsMOVAPDrr && RegOp != X86::FsMOVAPSrr)
426 if (!MemOp2RegOpTable.insert(std::make_pair((unsigned*)MemOp,
427 std::make_pair(RegOp, AuxInfo))))
428 AmbEntries.push_back(MemOp);
431 static const unsigned OpTbl2[][2] = {
432 { X86::ADC32rr, X86::ADC32rm },
433 { X86::ADC64rr, X86::ADC64rm },
434 { X86::ADD16rr, X86::ADD16rm },
435 { X86::ADD32rr, X86::ADD32rm },
436 { X86::ADD64rr, X86::ADD64rm },
437 { X86::ADD8rr, X86::ADD8rm },
438 { X86::ADDPDrr, X86::ADDPDrm },
439 { X86::ADDPSrr, X86::ADDPSrm },
440 { X86::ADDSDrr, X86::ADDSDrm },
441 { X86::ADDSSrr, X86::ADDSSrm },
442 { X86::ADDSUBPDrr, X86::ADDSUBPDrm },
443 { X86::ADDSUBPSrr, X86::ADDSUBPSrm },
444 { X86::AND16rr, X86::AND16rm },
445 { X86::AND32rr, X86::AND32rm },
446 { X86::AND64rr, X86::AND64rm },
447 { X86::AND8rr, X86::AND8rm },
448 { X86::ANDNPDrr, X86::ANDNPDrm },
449 { X86::ANDNPSrr, X86::ANDNPSrm },
450 { X86::ANDPDrr, X86::ANDPDrm },
451 { X86::ANDPSrr, X86::ANDPSrm },
452 { X86::CMOVA16rr, X86::CMOVA16rm },
453 { X86::CMOVA32rr, X86::CMOVA32rm },
454 { X86::CMOVA64rr, X86::CMOVA64rm },
455 { X86::CMOVAE16rr, X86::CMOVAE16rm },
456 { X86::CMOVAE32rr, X86::CMOVAE32rm },
457 { X86::CMOVAE64rr, X86::CMOVAE64rm },
458 { X86::CMOVB16rr, X86::CMOVB16rm },
459 { X86::CMOVB32rr, X86::CMOVB32rm },
460 { X86::CMOVB64rr, X86::CMOVB64rm },
461 { X86::CMOVBE16rr, X86::CMOVBE16rm },
462 { X86::CMOVBE32rr, X86::CMOVBE32rm },
463 { X86::CMOVBE64rr, X86::CMOVBE64rm },
464 { X86::CMOVE16rr, X86::CMOVE16rm },
465 { X86::CMOVE32rr, X86::CMOVE32rm },
466 { X86::CMOVE64rr, X86::CMOVE64rm },
467 { X86::CMOVG16rr, X86::CMOVG16rm },
468 { X86::CMOVG32rr, X86::CMOVG32rm },
469 { X86::CMOVG64rr, X86::CMOVG64rm },
470 { X86::CMOVGE16rr, X86::CMOVGE16rm },
471 { X86::CMOVGE32rr, X86::CMOVGE32rm },
472 { X86::CMOVGE64rr, X86::CMOVGE64rm },
473 { X86::CMOVL16rr, X86::CMOVL16rm },
474 { X86::CMOVL32rr, X86::CMOVL32rm },
475 { X86::CMOVL64rr, X86::CMOVL64rm },
476 { X86::CMOVLE16rr, X86::CMOVLE16rm },
477 { X86::CMOVLE32rr, X86::CMOVLE32rm },
478 { X86::CMOVLE64rr, X86::CMOVLE64rm },
479 { X86::CMOVNE16rr, X86::CMOVNE16rm },
480 { X86::CMOVNE32rr, X86::CMOVNE32rm },
481 { X86::CMOVNE64rr, X86::CMOVNE64rm },
482 { X86::CMOVNP16rr, X86::CMOVNP16rm },
483 { X86::CMOVNP32rr, X86::CMOVNP32rm },
484 { X86::CMOVNP64rr, X86::CMOVNP64rm },
485 { X86::CMOVNS16rr, X86::CMOVNS16rm },
486 { X86::CMOVNS32rr, X86::CMOVNS32rm },
487 { X86::CMOVNS64rr, X86::CMOVNS64rm },
488 { X86::CMOVP16rr, X86::CMOVP16rm },
489 { X86::CMOVP32rr, X86::CMOVP32rm },
490 { X86::CMOVP64rr, X86::CMOVP64rm },
491 { X86::CMOVS16rr, X86::CMOVS16rm },
492 { X86::CMOVS32rr, X86::CMOVS32rm },
493 { X86::CMOVS64rr, X86::CMOVS64rm },
494 { X86::CMPPDrri, X86::CMPPDrmi },
495 { X86::CMPPSrri, X86::CMPPSrmi },
496 { X86::CMPSDrr, X86::CMPSDrm },
497 { X86::CMPSSrr, X86::CMPSSrm },
498 { X86::DIVPDrr, X86::DIVPDrm },
499 { X86::DIVPSrr, X86::DIVPSrm },
500 { X86::DIVSDrr, X86::DIVSDrm },
501 { X86::DIVSSrr, X86::DIVSSrm },
502 { X86::FsANDNPDrr, X86::FsANDNPDrm },
503 { X86::FsANDNPSrr, X86::FsANDNPSrm },
504 { X86::FsANDPDrr, X86::FsANDPDrm },
505 { X86::FsANDPSrr, X86::FsANDPSrm },
506 { X86::FsORPDrr, X86::FsORPDrm },
507 { X86::FsORPSrr, X86::FsORPSrm },
508 { X86::FsXORPDrr, X86::FsXORPDrm },
509 { X86::FsXORPSrr, X86::FsXORPSrm },
510 { X86::HADDPDrr, X86::HADDPDrm },
511 { X86::HADDPSrr, X86::HADDPSrm },
512 { X86::HSUBPDrr, X86::HSUBPDrm },
513 { X86::HSUBPSrr, X86::HSUBPSrm },
514 { X86::IMUL16rr, X86::IMUL16rm },
515 { X86::IMUL32rr, X86::IMUL32rm },
516 { X86::IMUL64rr, X86::IMUL64rm },
517 { X86::MAXPDrr, X86::MAXPDrm },
518 { X86::MAXPDrr_Int, X86::MAXPDrm_Int },
519 { X86::MAXPSrr, X86::MAXPSrm },
520 { X86::MAXPSrr_Int, X86::MAXPSrm_Int },
521 { X86::MAXSDrr, X86::MAXSDrm },
522 { X86::MAXSDrr_Int, X86::MAXSDrm_Int },
523 { X86::MAXSSrr, X86::MAXSSrm },
524 { X86::MAXSSrr_Int, X86::MAXSSrm_Int },
525 { X86::MINPDrr, X86::MINPDrm },
526 { X86::MINPDrr_Int, X86::MINPDrm_Int },
527 { X86::MINPSrr, X86::MINPSrm },
528 { X86::MINPSrr_Int, X86::MINPSrm_Int },
529 { X86::MINSDrr, X86::MINSDrm },
530 { X86::MINSDrr_Int, X86::MINSDrm_Int },
531 { X86::MINSSrr, X86::MINSSrm },
532 { X86::MINSSrr_Int, X86::MINSSrm_Int },
533 { X86::MULPDrr, X86::MULPDrm },
534 { X86::MULPSrr, X86::MULPSrm },
535 { X86::MULSDrr, X86::MULSDrm },
536 { X86::MULSSrr, X86::MULSSrm },
537 { X86::OR16rr, X86::OR16rm },
538 { X86::OR32rr, X86::OR32rm },
539 { X86::OR64rr, X86::OR64rm },
540 { X86::OR8rr, X86::OR8rm },
541 { X86::ORPDrr, X86::ORPDrm },
542 { X86::ORPSrr, X86::ORPSrm },
543 { X86::PACKSSDWrr, X86::PACKSSDWrm },
544 { X86::PACKSSWBrr, X86::PACKSSWBrm },
545 { X86::PACKUSWBrr, X86::PACKUSWBrm },
546 { X86::PADDBrr, X86::PADDBrm },
547 { X86::PADDDrr, X86::PADDDrm },
548 { X86::PADDQrr, X86::PADDQrm },
549 { X86::PADDSBrr, X86::PADDSBrm },
550 { X86::PADDSWrr, X86::PADDSWrm },
551 { X86::PADDWrr, X86::PADDWrm },
552 { X86::PANDNrr, X86::PANDNrm },
553 { X86::PANDrr, X86::PANDrm },
554 { X86::PAVGBrr, X86::PAVGBrm },
555 { X86::PAVGWrr, X86::PAVGWrm },
556 { X86::PCMPEQBrr, X86::PCMPEQBrm },
557 { X86::PCMPEQDrr, X86::PCMPEQDrm },
558 { X86::PCMPEQWrr, X86::PCMPEQWrm },
559 { X86::PCMPGTBrr, X86::PCMPGTBrm },
560 { X86::PCMPGTDrr, X86::PCMPGTDrm },
561 { X86::PCMPGTWrr, X86::PCMPGTWrm },
562 { X86::PINSRWrri, X86::PINSRWrmi },
563 { X86::PMADDWDrr, X86::PMADDWDrm },
564 { X86::PMAXSWrr, X86::PMAXSWrm },
565 { X86::PMAXUBrr, X86::PMAXUBrm },
566 { X86::PMINSWrr, X86::PMINSWrm },
567 { X86::PMINUBrr, X86::PMINUBrm },
568 { X86::PMULHUWrr, X86::PMULHUWrm },
569 { X86::PMULHWrr, X86::PMULHWrm },
570 { X86::PMULLWrr, X86::PMULLWrm },
571 { X86::PMULUDQrr, X86::PMULUDQrm },
572 { X86::PORrr, X86::PORrm },
573 { X86::PSADBWrr, X86::PSADBWrm },
574 { X86::PSLLDrr, X86::PSLLDrm },
575 { X86::PSLLQrr, X86::PSLLQrm },
576 { X86::PSLLWrr, X86::PSLLWrm },
577 { X86::PSRADrr, X86::PSRADrm },
578 { X86::PSRAWrr, X86::PSRAWrm },
579 { X86::PSRLDrr, X86::PSRLDrm },
580 { X86::PSRLQrr, X86::PSRLQrm },
581 { X86::PSRLWrr, X86::PSRLWrm },
582 { X86::PSUBBrr, X86::PSUBBrm },
583 { X86::PSUBDrr, X86::PSUBDrm },
584 { X86::PSUBSBrr, X86::PSUBSBrm },
585 { X86::PSUBSWrr, X86::PSUBSWrm },
586 { X86::PSUBWrr, X86::PSUBWrm },
587 { X86::PUNPCKHBWrr, X86::PUNPCKHBWrm },
588 { X86::PUNPCKHDQrr, X86::PUNPCKHDQrm },
589 { X86::PUNPCKHQDQrr, X86::PUNPCKHQDQrm },
590 { X86::PUNPCKHWDrr, X86::PUNPCKHWDrm },
591 { X86::PUNPCKLBWrr, X86::PUNPCKLBWrm },
592 { X86::PUNPCKLDQrr, X86::PUNPCKLDQrm },
593 { X86::PUNPCKLQDQrr, X86::PUNPCKLQDQrm },
594 { X86::PUNPCKLWDrr, X86::PUNPCKLWDrm },
595 { X86::PXORrr, X86::PXORrm },
596 { X86::SBB32rr, X86::SBB32rm },
597 { X86::SBB64rr, X86::SBB64rm },
598 { X86::SHUFPDrri, X86::SHUFPDrmi },
599 { X86::SHUFPSrri, X86::SHUFPSrmi },
600 { X86::SUB16rr, X86::SUB16rm },
601 { X86::SUB32rr, X86::SUB32rm },
602 { X86::SUB64rr, X86::SUB64rm },
603 { X86::SUB8rr, X86::SUB8rm },
604 { X86::SUBPDrr, X86::SUBPDrm },
605 { X86::SUBPSrr, X86::SUBPSrm },
606 { X86::SUBSDrr, X86::SUBSDrm },
607 { X86::SUBSSrr, X86::SUBSSrm },
608 // FIXME: TEST*rr -> swapped operand of TEST*mr.
609 { X86::UNPCKHPDrr, X86::UNPCKHPDrm },
610 { X86::UNPCKHPSrr, X86::UNPCKHPSrm },
611 { X86::UNPCKLPDrr, X86::UNPCKLPDrm },
612 { X86::UNPCKLPSrr, X86::UNPCKLPSrm },
613 { X86::XOR16rr, X86::XOR16rm },
614 { X86::XOR32rr, X86::XOR32rm },
615 { X86::XOR64rr, X86::XOR64rm },
616 { X86::XOR8rr, X86::XOR8rm },
617 { X86::XORPDrr, X86::XORPDrm },
618 { X86::XORPSrr, X86::XORPSrm }
621 for (unsigned i = 0, e = array_lengthof(OpTbl2); i != e; ++i) {
622 unsigned RegOp = OpTbl2[i][0];
623 unsigned MemOp = OpTbl2[i][1];
624 if (!RegOp2MemOpTable2.insert(std::make_pair((unsigned*)RegOp, MemOp)))
625 assert(false && "Duplicated entries?");
626 unsigned AuxInfo = 2 | (1 << 4); // Index 1, folded load
627 if (!MemOp2RegOpTable.insert(std::make_pair((unsigned*)MemOp,
628 std::make_pair(RegOp, AuxInfo))))
629 AmbEntries.push_back(MemOp);
632 // Remove ambiguous entries.
633 assert(AmbEntries.empty() && "Duplicated entries in unfolding maps?");
636 bool X86InstrInfo::isMoveInstr(const MachineInstr& MI,
638 unsigned& destReg) const {
639 switch (MI.getOpcode()) {
646 case X86::MOV16to16_:
647 case X86::MOV32to32_:
648 case X86::MOV_Fp3232:
651 case X86::MOV_Fp3264:
652 case X86::MOV_Fp6432:
653 case X86::MOV_Fp6464:
654 case X86::FsMOVAPSrr:
655 case X86::FsMOVAPDrr:
658 case X86::MOVSS2PSrr:
659 case X86::MOVSD2PDrr:
660 case X86::MOVPS2SSrr:
661 case X86::MOVPD2SDrr:
662 case X86::MMX_MOVD64rr:
663 case X86::MMX_MOVQ64rr:
664 assert(MI.getNumOperands() >= 2 &&
665 MI.getOperand(0).isRegister() &&
666 MI.getOperand(1).isRegister() &&
667 "invalid register-register move instruction");
668 sourceReg = MI.getOperand(1).getReg();
669 destReg = MI.getOperand(0).getReg();
674 unsigned X86InstrInfo::isLoadFromStackSlot(MachineInstr *MI,
675 int &FrameIndex) const {
676 switch (MI->getOpcode()) {
689 case X86::MMX_MOVD64rm:
690 case X86::MMX_MOVQ64rm:
691 if (MI->getOperand(1).isFI() && MI->getOperand(2).isImm() &&
692 MI->getOperand(3).isReg() && MI->getOperand(4).isImm() &&
693 MI->getOperand(2).getImm() == 1 &&
694 MI->getOperand(3).getReg() == 0 &&
695 MI->getOperand(4).getImm() == 0) {
696 FrameIndex = MI->getOperand(1).getIndex();
697 return MI->getOperand(0).getReg();
704 unsigned X86InstrInfo::isStoreToStackSlot(MachineInstr *MI,
705 int &FrameIndex) const {
706 switch (MI->getOpcode()) {
719 case X86::MMX_MOVD64mr:
720 case X86::MMX_MOVQ64mr:
721 case X86::MMX_MOVNTQmr:
722 if (MI->getOperand(0).isFI() && MI->getOperand(1).isImm() &&
723 MI->getOperand(2).isReg() && MI->getOperand(3).isImm() &&
724 MI->getOperand(1).getImm() == 1 &&
725 MI->getOperand(2).getReg() == 0 &&
726 MI->getOperand(3).getImm() == 0) {
727 FrameIndex = MI->getOperand(0).getIndex();
728 return MI->getOperand(4).getReg();
736 bool X86InstrInfo::isReallyTriviallyReMaterializable(MachineInstr *MI) const {
737 switch (MI->getOpcode()) {
750 case X86::MMX_MOVD64rm:
751 case X86::MMX_MOVQ64rm:
752 // Loads from constant pools are trivially rematerializable.
753 if (MI->getOperand(1).isReg() && MI->getOperand(2).isImm() &&
754 MI->getOperand(3).isReg() && MI->getOperand(4).isCPI() &&
755 MI->getOperand(2).getImm() == 1 &&
756 MI->getOperand(3).getReg() == 0) {
757 unsigned BaseReg = MI->getOperand(1).getReg();
762 // Allow re-materialization of PIC load.
763 MachineRegisterInfo &MRI = MI->getParent()->getParent()->getRegInfo();
764 bool isPICBase = false;
765 for (MachineRegisterInfo::def_iterator I = MRI.def_begin(BaseReg),
766 E = MRI.def_end(); I != E; ++I) {
767 MachineInstr *DefMI = I.getOperand().getParent();
768 if (DefMI->getOpcode() != X86::MOVPC32r)
770 assert(!isPICBase && "More than one PIC base?");
778 // All other instructions marked M_REMATERIALIZABLE are always trivially
783 /// isInvariantLoad - Return true if the specified instruction (which is marked
784 /// mayLoad) is loading from a location whose value is invariant across the
785 /// function. For example, loading a value from the constant pool or from
786 /// from the argument area of a function if it does not change. This should
787 /// only return true of *all* loads the instruction does are invariant (if it
788 /// does multiple loads).
789 bool X86InstrInfo::isInvariantLoad(MachineInstr *MI) const {
790 // This code cares about loads from three cases: constant pool entries,
791 // invariant argument slots, and global stubs. In order to handle these cases
792 // for all of the myriad of X86 instructions, we just scan for a CP/FI/GV
793 // operand and base our analysis on it. This is safe because the address of
794 // none of these three cases is ever used as anything other than a load base
795 // and X86 doesn't have any instructions that load from multiple places.
797 for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
798 const MachineOperand &MO = MI->getOperand(i);
799 // Loads from constant pools are trivially invariant.
804 if (TM.getSubtarget<X86Subtarget>().GVRequiresExtraLoad(MO.getGlobal(),
810 // If this is a load from an invariant stack slot, the load is a constant.
812 const MachineFrameInfo &MFI =
813 *MI->getParent()->getParent()->getFrameInfo();
814 int Idx = MO.getIndex();
815 return MFI.isFixedObjectIndex(Idx) && MFI.isImmutableObjectIndex(Idx);
819 // All other instances of these instructions are presumed to have other
824 /// hasLiveCondCodeDef - True if MI has a condition code def, e.g. EFLAGS, that
825 /// is not marked dead.
826 static bool hasLiveCondCodeDef(MachineInstr *MI) {
827 for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
828 MachineOperand &MO = MI->getOperand(i);
829 if (MO.isRegister() && MO.isDef() &&
830 MO.getReg() == X86::EFLAGS && !MO.isDead()) {
837 /// convertToThreeAddress - This method must be implemented by targets that
838 /// set the M_CONVERTIBLE_TO_3_ADDR flag. When this flag is set, the target
839 /// may be able to convert a two-address instruction into a true
840 /// three-address instruction on demand. This allows the X86 target (for
841 /// example) to convert ADD and SHL instructions into LEA instructions if they
842 /// would require register copies due to two-addressness.
844 /// This method returns a null pointer if the transformation cannot be
845 /// performed, otherwise it returns the new instruction.
848 X86InstrInfo::convertToThreeAddress(MachineFunction::iterator &MFI,
849 MachineBasicBlock::iterator &MBBI,
850 LiveVariables &LV) const {
851 MachineInstr *MI = MBBI;
852 // All instructions input are two-addr instructions. Get the known operands.
853 unsigned Dest = MI->getOperand(0).getReg();
854 unsigned Src = MI->getOperand(1).getReg();
856 MachineInstr *NewMI = NULL;
857 // FIXME: 16-bit LEA's are really slow on Athlons, but not bad on P4's. When
858 // we have better subtarget support, enable the 16-bit LEA generation here.
859 bool DisableLEA16 = true;
861 unsigned MIOpc = MI->getOpcode();
863 case X86::SHUFPSrri: {
864 assert(MI->getNumOperands() == 4 && "Unknown shufps instruction!");
865 if (!TM.getSubtarget<X86Subtarget>().hasSSE2()) return 0;
867 unsigned A = MI->getOperand(0).getReg();
868 unsigned B = MI->getOperand(1).getReg();
869 unsigned C = MI->getOperand(2).getReg();
870 unsigned M = MI->getOperand(3).getImm();
871 if (B != C) return 0;
872 NewMI = BuildMI(get(X86::PSHUFDri), A).addReg(B).addImm(M);
876 assert(MI->getNumOperands() >= 3 && "Unknown shift instruction!");
877 // NOTE: LEA doesn't produce flags like shift does, but LLVM never uses
878 // the flags produced by a shift yet, so this is safe.
879 unsigned Dest = MI->getOperand(0).getReg();
880 unsigned Src = MI->getOperand(1).getReg();
881 unsigned ShAmt = MI->getOperand(2).getImm();
882 if (ShAmt == 0 || ShAmt >= 4) return 0;
884 NewMI = BuildMI(get(X86::LEA64r), Dest)
885 .addReg(0).addImm(1 << ShAmt).addReg(Src).addImm(0);
889 assert(MI->getNumOperands() >= 3 && "Unknown shift instruction!");
890 // NOTE: LEA doesn't produce flags like shift does, but LLVM never uses
891 // the flags produced by a shift yet, so this is safe.
892 unsigned Dest = MI->getOperand(0).getReg();
893 unsigned Src = MI->getOperand(1).getReg();
894 unsigned ShAmt = MI->getOperand(2).getImm();
895 if (ShAmt == 0 || ShAmt >= 4) return 0;
897 unsigned Opc = TM.getSubtarget<X86Subtarget>().is64Bit() ?
898 X86::LEA64_32r : X86::LEA32r;
899 NewMI = BuildMI(get(Opc), Dest)
900 .addReg(0).addImm(1 << ShAmt).addReg(Src).addImm(0);
904 assert(MI->getNumOperands() >= 3 && "Unknown shift instruction!");
905 // NOTE: LEA doesn't produce flags like shift does, but LLVM never uses
906 // the flags produced by a shift yet, so this is safe.
907 unsigned Dest = MI->getOperand(0).getReg();
908 unsigned Src = MI->getOperand(1).getReg();
909 unsigned ShAmt = MI->getOperand(2).getImm();
910 if (ShAmt == 0 || ShAmt >= 4) return 0;
913 // If 16-bit LEA is disabled, use 32-bit LEA via subregisters.
914 MachineRegisterInfo &RegInfo = MFI->getParent()->getRegInfo();
915 unsigned Opc = TM.getSubtarget<X86Subtarget>().is64Bit()
916 ? X86::LEA64_32r : X86::LEA32r;
917 unsigned leaInReg = RegInfo.createVirtualRegister(&X86::GR32RegClass);
918 unsigned leaOutReg = RegInfo.createVirtualRegister(&X86::GR32RegClass);
920 // Build and insert into an implicit UNDEF value. This is OK because
921 // well be shifting and then extracting the lower 16-bits.
923 BuildMI(get(X86::INSERT_SUBREG),leaInReg).addImm(X86::IMPL_VAL_UNDEF)
924 .addReg(Src).addImm(X86::SUBREG_16BIT);
926 NewMI = BuildMI(get(Opc), leaOutReg)
927 .addReg(0).addImm(1 << ShAmt).addReg(leaInReg).addImm(0);
930 BuildMI(get(X86::EXTRACT_SUBREG), Dest)
931 .addReg(leaOutReg).addImm(X86::SUBREG_16BIT);
932 Ext->copyKillDeadInfo(MI);
934 MFI->insert(MBBI, Ins); // Insert the insert_subreg
935 LV.instructionChanged(MI, NewMI); // Update live variables
936 LV.addVirtualRegisterKilled(leaInReg, NewMI);
937 MFI->insert(MBBI, NewMI); // Insert the new inst
938 LV.addVirtualRegisterKilled(leaOutReg, Ext);
939 MFI->insert(MBBI, Ext); // Insert the extract_subreg
942 NewMI = BuildMI(get(X86::LEA16r), Dest)
943 .addReg(0).addImm(1 << ShAmt).addReg(Src).addImm(0);
948 // The following opcodes also sets the condition code register(s). Only
949 // convert them to equivalent lea if the condition code register def's
951 if (hasLiveCondCodeDef(MI))
954 bool is64Bit = TM.getSubtarget<X86Subtarget>().is64Bit();
959 assert(MI->getNumOperands() >= 2 && "Unknown inc instruction!");
960 unsigned Opc = MIOpc == X86::INC64r ? X86::LEA64r
961 : (is64Bit ? X86::LEA64_32r : X86::LEA32r);
962 NewMI = addRegOffset(BuildMI(get(Opc), Dest), Src, 1);
967 if (DisableLEA16) return 0;
968 assert(MI->getNumOperands() >= 2 && "Unknown inc instruction!");
969 NewMI = addRegOffset(BuildMI(get(X86::LEA16r), Dest), Src, 1);
973 assert(MI->getNumOperands() >= 2 && "Unknown dec instruction!");
974 unsigned Opc = MIOpc == X86::DEC64r ? X86::LEA64r
975 : (is64Bit ? X86::LEA64_32r : X86::LEA32r);
976 NewMI = addRegOffset(BuildMI(get(Opc), Dest), Src, -1);
981 if (DisableLEA16) return 0;
982 assert(MI->getNumOperands() >= 2 && "Unknown dec instruction!");
983 NewMI = addRegOffset(BuildMI(get(X86::LEA16r), Dest), Src, -1);
987 assert(MI->getNumOperands() >= 3 && "Unknown add instruction!");
988 unsigned Opc = MIOpc == X86::ADD64rr ? X86::LEA64r
989 : (is64Bit ? X86::LEA64_32r : X86::LEA32r);
990 NewMI = addRegReg(BuildMI(get(Opc), Dest), Src,
991 MI->getOperand(2).getReg());
995 if (DisableLEA16) return 0;
996 assert(MI->getNumOperands() >= 3 && "Unknown add instruction!");
997 NewMI = addRegReg(BuildMI(get(X86::LEA16r), Dest), Src,
998 MI->getOperand(2).getReg());
1000 case X86::ADD64ri32:
1002 assert(MI->getNumOperands() >= 3 && "Unknown add instruction!");
1003 if (MI->getOperand(2).isImmediate())
1004 NewMI = addRegOffset(BuildMI(get(X86::LEA64r), Dest), Src,
1005 MI->getOperand(2).getImm());
1009 assert(MI->getNumOperands() >= 3 && "Unknown add instruction!");
1010 if (MI->getOperand(2).isImmediate()) {
1011 unsigned Opc = is64Bit ? X86::LEA64_32r : X86::LEA32r;
1012 NewMI = addRegOffset(BuildMI(get(Opc), Dest), Src,
1013 MI->getOperand(2).getImm());
1018 if (DisableLEA16) return 0;
1019 assert(MI->getNumOperands() >= 3 && "Unknown add instruction!");
1020 if (MI->getOperand(2).isImmediate())
1021 NewMI = addRegOffset(BuildMI(get(X86::LEA16r), Dest), Src,
1022 MI->getOperand(2).getImm());
1025 if (DisableLEA16) return 0;
1027 case X86::SHL64ri: {
1028 assert(MI->getNumOperands() >= 3 && MI->getOperand(2).isImmediate() &&
1029 "Unknown shl instruction!");
1030 unsigned ShAmt = MI->getOperand(2).getImm();
1031 if (ShAmt == 1 || ShAmt == 2 || ShAmt == 3) {
1033 AM.Scale = 1 << ShAmt;
1035 unsigned Opc = MIOpc == X86::SHL64ri ? X86::LEA64r
1036 : (MIOpc == X86::SHL32ri
1037 ? (is64Bit ? X86::LEA64_32r : X86::LEA32r) : X86::LEA16r);
1038 NewMI = addFullAddress(BuildMI(get(Opc), Dest), AM);
1046 if (!NewMI) return 0;
1048 NewMI->copyKillDeadInfo(MI);
1049 LV.instructionChanged(MI, NewMI); // Update live variables
1050 MFI->insert(MBBI, NewMI); // Insert the new inst
1054 /// commuteInstruction - We have a few instructions that must be hacked on to
1057 MachineInstr *X86InstrInfo::commuteInstruction(MachineInstr *MI) const {
1058 switch (MI->getOpcode()) {
1059 case X86::SHRD16rri8: // A = SHRD16rri8 B, C, I -> A = SHLD16rri8 C, B, (16-I)
1060 case X86::SHLD16rri8: // A = SHLD16rri8 B, C, I -> A = SHRD16rri8 C, B, (16-I)
1061 case X86::SHRD32rri8: // A = SHRD32rri8 B, C, I -> A = SHLD32rri8 C, B, (32-I)
1062 case X86::SHLD32rri8: // A = SHLD32rri8 B, C, I -> A = SHRD32rri8 C, B, (32-I)
1063 case X86::SHRD64rri8: // A = SHRD64rri8 B, C, I -> A = SHLD64rri8 C, B, (64-I)
1064 case X86::SHLD64rri8:{// A = SHLD64rri8 B, C, I -> A = SHRD64rri8 C, B, (64-I)
1067 switch (MI->getOpcode()) {
1068 default: assert(0 && "Unreachable!");
1069 case X86::SHRD16rri8: Size = 16; Opc = X86::SHLD16rri8; break;
1070 case X86::SHLD16rri8: Size = 16; Opc = X86::SHRD16rri8; break;
1071 case X86::SHRD32rri8: Size = 32; Opc = X86::SHLD32rri8; break;
1072 case X86::SHLD32rri8: Size = 32; Opc = X86::SHRD32rri8; break;
1073 case X86::SHRD64rri8: Size = 64; Opc = X86::SHLD64rri8; break;
1074 case X86::SHLD64rri8: Size = 64; Opc = X86::SHRD64rri8; break;
1076 unsigned Amt = MI->getOperand(3).getImm();
1077 unsigned A = MI->getOperand(0).getReg();
1078 unsigned B = MI->getOperand(1).getReg();
1079 unsigned C = MI->getOperand(2).getReg();
1080 bool BisKill = MI->getOperand(1).isKill();
1081 bool CisKill = MI->getOperand(2).isKill();
1082 // If machine instrs are no longer in two-address forms, update
1083 // destination register as well.
1085 // Must be two address instruction!
1086 assert(MI->getDesc().getOperandConstraint(0, TOI::TIED_TO) &&
1087 "Expecting a two-address instruction!");
1091 return BuildMI(get(Opc), A).addReg(C, false, false, CisKill)
1092 .addReg(B, false, false, BisKill).addImm(Size-Amt);
1094 case X86::CMOVB16rr:
1095 case X86::CMOVB32rr:
1096 case X86::CMOVB64rr:
1097 case X86::CMOVAE16rr:
1098 case X86::CMOVAE32rr:
1099 case X86::CMOVAE64rr:
1100 case X86::CMOVE16rr:
1101 case X86::CMOVE32rr:
1102 case X86::CMOVE64rr:
1103 case X86::CMOVNE16rr:
1104 case X86::CMOVNE32rr:
1105 case X86::CMOVNE64rr:
1106 case X86::CMOVBE16rr:
1107 case X86::CMOVBE32rr:
1108 case X86::CMOVBE64rr:
1109 case X86::CMOVA16rr:
1110 case X86::CMOVA32rr:
1111 case X86::CMOVA64rr:
1112 case X86::CMOVL16rr:
1113 case X86::CMOVL32rr:
1114 case X86::CMOVL64rr:
1115 case X86::CMOVGE16rr:
1116 case X86::CMOVGE32rr:
1117 case X86::CMOVGE64rr:
1118 case X86::CMOVLE16rr:
1119 case X86::CMOVLE32rr:
1120 case X86::CMOVLE64rr:
1121 case X86::CMOVG16rr:
1122 case X86::CMOVG32rr:
1123 case X86::CMOVG64rr:
1124 case X86::CMOVS16rr:
1125 case X86::CMOVS32rr:
1126 case X86::CMOVS64rr:
1127 case X86::CMOVNS16rr:
1128 case X86::CMOVNS32rr:
1129 case X86::CMOVNS64rr:
1130 case X86::CMOVP16rr:
1131 case X86::CMOVP32rr:
1132 case X86::CMOVP64rr:
1133 case X86::CMOVNP16rr:
1134 case X86::CMOVNP32rr:
1135 case X86::CMOVNP64rr: {
1137 switch (MI->getOpcode()) {
1139 case X86::CMOVB16rr: Opc = X86::CMOVAE16rr; break;
1140 case X86::CMOVB32rr: Opc = X86::CMOVAE32rr; break;
1141 case X86::CMOVB64rr: Opc = X86::CMOVAE64rr; break;
1142 case X86::CMOVAE16rr: Opc = X86::CMOVB16rr; break;
1143 case X86::CMOVAE32rr: Opc = X86::CMOVB32rr; break;
1144 case X86::CMOVAE64rr: Opc = X86::CMOVB64rr; break;
1145 case X86::CMOVE16rr: Opc = X86::CMOVNE16rr; break;
1146 case X86::CMOVE32rr: Opc = X86::CMOVNE32rr; break;
1147 case X86::CMOVE64rr: Opc = X86::CMOVNE64rr; break;
1148 case X86::CMOVNE16rr: Opc = X86::CMOVE16rr; break;
1149 case X86::CMOVNE32rr: Opc = X86::CMOVE32rr; break;
1150 case X86::CMOVNE64rr: Opc = X86::CMOVE64rr; break;
1151 case X86::CMOVBE16rr: Opc = X86::CMOVA16rr; break;
1152 case X86::CMOVBE32rr: Opc = X86::CMOVA32rr; break;
1153 case X86::CMOVBE64rr: Opc = X86::CMOVA64rr; break;
1154 case X86::CMOVA16rr: Opc = X86::CMOVBE16rr; break;
1155 case X86::CMOVA32rr: Opc = X86::CMOVBE32rr; break;
1156 case X86::CMOVA64rr: Opc = X86::CMOVBE64rr; break;
1157 case X86::CMOVL16rr: Opc = X86::CMOVGE16rr; break;
1158 case X86::CMOVL32rr: Opc = X86::CMOVGE32rr; break;
1159 case X86::CMOVL64rr: Opc = X86::CMOVGE64rr; break;
1160 case X86::CMOVGE16rr: Opc = X86::CMOVL16rr; break;
1161 case X86::CMOVGE32rr: Opc = X86::CMOVL32rr; break;
1162 case X86::CMOVGE64rr: Opc = X86::CMOVL64rr; break;
1163 case X86::CMOVLE16rr: Opc = X86::CMOVG16rr; break;
1164 case X86::CMOVLE32rr: Opc = X86::CMOVG32rr; break;
1165 case X86::CMOVLE64rr: Opc = X86::CMOVG64rr; break;
1166 case X86::CMOVG16rr: Opc = X86::CMOVLE16rr; break;
1167 case X86::CMOVG32rr: Opc = X86::CMOVLE32rr; break;
1168 case X86::CMOVG64rr: Opc = X86::CMOVLE64rr; break;
1169 case X86::CMOVS16rr: Opc = X86::CMOVNS16rr; break;
1170 case X86::CMOVS32rr: Opc = X86::CMOVNS32rr; break;
1171 case X86::CMOVS64rr: Opc = X86::CMOVNS32rr; break;
1172 case X86::CMOVNS16rr: Opc = X86::CMOVS16rr; break;
1173 case X86::CMOVNS32rr: Opc = X86::CMOVS32rr; break;
1174 case X86::CMOVNS64rr: Opc = X86::CMOVS64rr; break;
1175 case X86::CMOVP16rr: Opc = X86::CMOVNP16rr; break;
1176 case X86::CMOVP32rr: Opc = X86::CMOVNP32rr; break;
1177 case X86::CMOVP64rr: Opc = X86::CMOVNP32rr; break;
1178 case X86::CMOVNP16rr: Opc = X86::CMOVP16rr; break;
1179 case X86::CMOVNP32rr: Opc = X86::CMOVP32rr; break;
1180 case X86::CMOVNP64rr: Opc = X86::CMOVP64rr; break;
1183 MI->setDesc(get(Opc));
1184 // Fallthrough intended.
1187 return TargetInstrInfoImpl::commuteInstruction(MI);
1191 static X86::CondCode GetCondFromBranchOpc(unsigned BrOpc) {
1193 default: return X86::COND_INVALID;
1194 case X86::JE: return X86::COND_E;
1195 case X86::JNE: return X86::COND_NE;
1196 case X86::JL: return X86::COND_L;
1197 case X86::JLE: return X86::COND_LE;
1198 case X86::JG: return X86::COND_G;
1199 case X86::JGE: return X86::COND_GE;
1200 case X86::JB: return X86::COND_B;
1201 case X86::JBE: return X86::COND_BE;
1202 case X86::JA: return X86::COND_A;
1203 case X86::JAE: return X86::COND_AE;
1204 case X86::JS: return X86::COND_S;
1205 case X86::JNS: return X86::COND_NS;
1206 case X86::JP: return X86::COND_P;
1207 case X86::JNP: return X86::COND_NP;
1208 case X86::JO: return X86::COND_O;
1209 case X86::JNO: return X86::COND_NO;
1213 unsigned X86::GetCondBranchFromCond(X86::CondCode CC) {
1215 default: assert(0 && "Illegal condition code!");
1216 case X86::COND_E: return X86::JE;
1217 case X86::COND_NE: return X86::JNE;
1218 case X86::COND_L: return X86::JL;
1219 case X86::COND_LE: return X86::JLE;
1220 case X86::COND_G: return X86::JG;
1221 case X86::COND_GE: return X86::JGE;
1222 case X86::COND_B: return X86::JB;
1223 case X86::COND_BE: return X86::JBE;
1224 case X86::COND_A: return X86::JA;
1225 case X86::COND_AE: return X86::JAE;
1226 case X86::COND_S: return X86::JS;
1227 case X86::COND_NS: return X86::JNS;
1228 case X86::COND_P: return X86::JP;
1229 case X86::COND_NP: return X86::JNP;
1230 case X86::COND_O: return X86::JO;
1231 case X86::COND_NO: return X86::JNO;
1235 /// GetOppositeBranchCondition - Return the inverse of the specified condition,
1236 /// e.g. turning COND_E to COND_NE.
1237 X86::CondCode X86::GetOppositeBranchCondition(X86::CondCode CC) {
1239 default: assert(0 && "Illegal condition code!");
1240 case X86::COND_E: return X86::COND_NE;
1241 case X86::COND_NE: return X86::COND_E;
1242 case X86::COND_L: return X86::COND_GE;
1243 case X86::COND_LE: return X86::COND_G;
1244 case X86::COND_G: return X86::COND_LE;
1245 case X86::COND_GE: return X86::COND_L;
1246 case X86::COND_B: return X86::COND_AE;
1247 case X86::COND_BE: return X86::COND_A;
1248 case X86::COND_A: return X86::COND_BE;
1249 case X86::COND_AE: return X86::COND_B;
1250 case X86::COND_S: return X86::COND_NS;
1251 case X86::COND_NS: return X86::COND_S;
1252 case X86::COND_P: return X86::COND_NP;
1253 case X86::COND_NP: return X86::COND_P;
1254 case X86::COND_O: return X86::COND_NO;
1255 case X86::COND_NO: return X86::COND_O;
1259 bool X86InstrInfo::isUnpredicatedTerminator(const MachineInstr *MI) const {
1260 const TargetInstrDesc &TID = MI->getDesc();
1261 if (!TID.isTerminator()) return false;
1263 // Conditional branch is a special case.
1264 if (TID.isBranch() && !TID.isBarrier())
1266 if (!TID.isPredicable())
1268 return !isPredicated(MI);
1271 // For purposes of branch analysis do not count FP_REG_KILL as a terminator.
1272 static bool isBrAnalysisUnpredicatedTerminator(const MachineInstr *MI,
1273 const X86InstrInfo &TII) {
1274 if (MI->getOpcode() == X86::FP_REG_KILL)
1276 return TII.isUnpredicatedTerminator(MI);
1279 bool X86InstrInfo::AnalyzeBranch(MachineBasicBlock &MBB,
1280 MachineBasicBlock *&TBB,
1281 MachineBasicBlock *&FBB,
1282 std::vector<MachineOperand> &Cond) const {
1283 // If the block has no terminators, it just falls into the block after it.
1284 MachineBasicBlock::iterator I = MBB.end();
1285 if (I == MBB.begin() || !isBrAnalysisUnpredicatedTerminator(--I, *this))
1288 // Get the last instruction in the block.
1289 MachineInstr *LastInst = I;
1291 // If there is only one terminator instruction, process it.
1292 if (I == MBB.begin() || !isBrAnalysisUnpredicatedTerminator(--I, *this)) {
1293 if (!LastInst->getDesc().isBranch())
1296 // If the block ends with a branch there are 3 possibilities:
1297 // it's an unconditional, conditional, or indirect branch.
1299 if (LastInst->getOpcode() == X86::JMP) {
1300 TBB = LastInst->getOperand(0).getMBB();
1303 X86::CondCode BranchCode = GetCondFromBranchOpc(LastInst->getOpcode());
1304 if (BranchCode == X86::COND_INVALID)
1305 return true; // Can't handle indirect branch.
1307 // Otherwise, block ends with fall-through condbranch.
1308 TBB = LastInst->getOperand(0).getMBB();
1309 Cond.push_back(MachineOperand::CreateImm(BranchCode));
1313 // Get the instruction before it if it's a terminator.
1314 MachineInstr *SecondLastInst = I;
1316 // If there are three terminators, we don't know what sort of block this is.
1317 if (SecondLastInst && I != MBB.begin() &&
1318 isBrAnalysisUnpredicatedTerminator(--I, *this))
1321 // If the block ends with X86::JMP and a conditional branch, handle it.
1322 X86::CondCode BranchCode = GetCondFromBranchOpc(SecondLastInst->getOpcode());
1323 if (BranchCode != X86::COND_INVALID && LastInst->getOpcode() == X86::JMP) {
1324 TBB = SecondLastInst->getOperand(0).getMBB();
1325 Cond.push_back(MachineOperand::CreateImm(BranchCode));
1326 FBB = LastInst->getOperand(0).getMBB();
1330 // If the block ends with two X86::JMPs, handle it. The second one is not
1331 // executed, so remove it.
1332 if (SecondLastInst->getOpcode() == X86::JMP &&
1333 LastInst->getOpcode() == X86::JMP) {
1334 TBB = SecondLastInst->getOperand(0).getMBB();
1336 I->eraseFromParent();
1340 // Otherwise, can't handle this.
1344 unsigned X86InstrInfo::RemoveBranch(MachineBasicBlock &MBB) const {
1345 MachineBasicBlock::iterator I = MBB.end();
1346 if (I == MBB.begin()) return 0;
1348 if (I->getOpcode() != X86::JMP &&
1349 GetCondFromBranchOpc(I->getOpcode()) == X86::COND_INVALID)
1352 // Remove the branch.
1353 I->eraseFromParent();
1357 if (I == MBB.begin()) return 1;
1359 if (GetCondFromBranchOpc(I->getOpcode()) == X86::COND_INVALID)
1362 // Remove the branch.
1363 I->eraseFromParent();
1367 static const MachineInstrBuilder &X86InstrAddOperand(MachineInstrBuilder &MIB,
1368 MachineOperand &MO) {
1369 if (MO.isRegister())
1370 MIB = MIB.addReg(MO.getReg(), MO.isDef(), MO.isImplicit(),
1371 false, false, MO.getSubReg());
1372 else if (MO.isImmediate())
1373 MIB = MIB.addImm(MO.getImm());
1374 else if (MO.isFrameIndex())
1375 MIB = MIB.addFrameIndex(MO.getIndex());
1376 else if (MO.isGlobalAddress())
1377 MIB = MIB.addGlobalAddress(MO.getGlobal(), MO.getOffset());
1378 else if (MO.isConstantPoolIndex())
1379 MIB = MIB.addConstantPoolIndex(MO.getIndex(), MO.getOffset());
1380 else if (MO.isJumpTableIndex())
1381 MIB = MIB.addJumpTableIndex(MO.getIndex());
1382 else if (MO.isExternalSymbol())
1383 MIB = MIB.addExternalSymbol(MO.getSymbolName());
1385 assert(0 && "Unknown operand for X86InstrAddOperand!");
1391 X86InstrInfo::InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
1392 MachineBasicBlock *FBB,
1393 const std::vector<MachineOperand> &Cond) const {
1394 // Shouldn't be a fall through.
1395 assert(TBB && "InsertBranch must not be told to insert a fallthrough");
1396 assert((Cond.size() == 1 || Cond.size() == 0) &&
1397 "X86 branch conditions have one component!");
1399 if (FBB == 0) { // One way branch.
1401 // Unconditional branch?
1402 BuildMI(&MBB, get(X86::JMP)).addMBB(TBB);
1404 // Conditional branch.
1405 unsigned Opc = GetCondBranchFromCond((X86::CondCode)Cond[0].getImm());
1406 BuildMI(&MBB, get(Opc)).addMBB(TBB);
1411 // Two-way Conditional branch.
1412 unsigned Opc = GetCondBranchFromCond((X86::CondCode)Cond[0].getImm());
1413 BuildMI(&MBB, get(Opc)).addMBB(TBB);
1414 BuildMI(&MBB, get(X86::JMP)).addMBB(FBB);
1418 void X86InstrInfo::copyRegToReg(MachineBasicBlock &MBB,
1419 MachineBasicBlock::iterator MI,
1420 unsigned DestReg, unsigned SrcReg,
1421 const TargetRegisterClass *DestRC,
1422 const TargetRegisterClass *SrcRC) const {
1423 if (DestRC == SrcRC) {
1425 if (DestRC == &X86::GR64RegClass) {
1427 } else if (DestRC == &X86::GR32RegClass) {
1429 } else if (DestRC == &X86::GR16RegClass) {
1431 } else if (DestRC == &X86::GR8RegClass) {
1433 } else if (DestRC == &X86::GR32_RegClass) {
1434 Opc = X86::MOV32_rr;
1435 } else if (DestRC == &X86::GR16_RegClass) {
1436 Opc = X86::MOV16_rr;
1437 } else if (DestRC == &X86::RFP32RegClass) {
1438 Opc = X86::MOV_Fp3232;
1439 } else if (DestRC == &X86::RFP64RegClass || DestRC == &X86::RSTRegClass) {
1440 Opc = X86::MOV_Fp6464;
1441 } else if (DestRC == &X86::RFP80RegClass) {
1442 Opc = X86::MOV_Fp8080;
1443 } else if (DestRC == &X86::FR32RegClass) {
1444 Opc = X86::FsMOVAPSrr;
1445 } else if (DestRC == &X86::FR64RegClass) {
1446 Opc = X86::FsMOVAPDrr;
1447 } else if (DestRC == &X86::VR128RegClass) {
1448 Opc = X86::MOVAPSrr;
1449 } else if (DestRC == &X86::VR64RegClass) {
1450 Opc = X86::MMX_MOVQ64rr;
1452 assert(0 && "Unknown regclass");
1455 BuildMI(MBB, MI, get(Opc), DestReg).addReg(SrcReg);
1459 // Moving EFLAGS to / from another register requires a push and a pop.
1460 if (SrcRC == &X86::CCRRegClass) {
1461 assert(SrcReg == X86::EFLAGS);
1462 if (DestRC == &X86::GR64RegClass) {
1463 BuildMI(MBB, MI, get(X86::PUSHFQ));
1464 BuildMI(MBB, MI, get(X86::POP64r), DestReg);
1466 } else if (DestRC == &X86::GR32RegClass) {
1467 BuildMI(MBB, MI, get(X86::PUSHFD));
1468 BuildMI(MBB, MI, get(X86::POP32r), DestReg);
1471 } else if (DestRC == &X86::CCRRegClass) {
1472 assert(DestReg == X86::EFLAGS);
1473 if (SrcRC == &X86::GR64RegClass) {
1474 BuildMI(MBB, MI, get(X86::PUSH64r)).addReg(SrcReg);
1475 BuildMI(MBB, MI, get(X86::POPFQ));
1477 } else if (SrcRC == &X86::GR32RegClass) {
1478 BuildMI(MBB, MI, get(X86::PUSH32r)).addReg(SrcReg);
1479 BuildMI(MBB, MI, get(X86::POPFD));
1484 // Moving from ST(0) turns into FpGET_ST0_32 etc.
1485 if (SrcRC == &X86::RSTRegClass) {
1486 // Copying from ST(0). FIXME: handle ST(1) also
1487 assert(SrcReg == X86::ST0 && "Can only copy from TOS right now");
1489 if (DestRC == &X86::RFP32RegClass)
1490 Opc = X86::FpGET_ST0_32;
1491 else if (DestRC == &X86::RFP64RegClass)
1492 Opc = X86::FpGET_ST0_64;
1494 assert(DestRC == &X86::RFP80RegClass);
1495 Opc = X86::FpGET_ST0_80;
1497 BuildMI(MBB, MI, get(Opc), DestReg);
1501 // Moving to ST(0) turns into FpSET_ST0_32 etc.
1502 if (DestRC == &X86::RSTRegClass) {
1503 // Copying to ST(0). FIXME: handle ST(1) also
1504 assert(DestReg == X86::ST0 && "Can only copy to TOS right now");
1506 if (SrcRC == &X86::RFP32RegClass)
1507 Opc = X86::FpSET_ST0_32;
1508 else if (SrcRC == &X86::RFP64RegClass)
1509 Opc = X86::FpSET_ST0_64;
1511 assert(SrcRC == &X86::RFP80RegClass);
1512 Opc = X86::FpSET_ST0_80;
1514 BuildMI(MBB, MI, get(Opc)).addReg(SrcReg);
1518 assert(0 && "Not yet supported!");
1522 static unsigned getStoreRegOpcode(const TargetRegisterClass *RC,
1523 unsigned StackAlign) {
1525 if (RC == &X86::GR64RegClass) {
1527 } else if (RC == &X86::GR32RegClass) {
1529 } else if (RC == &X86::GR16RegClass) {
1531 } else if (RC == &X86::GR8RegClass) {
1533 } else if (RC == &X86::GR32_RegClass) {
1534 Opc = X86::MOV32_mr;
1535 } else if (RC == &X86::GR16_RegClass) {
1536 Opc = X86::MOV16_mr;
1537 } else if (RC == &X86::RFP80RegClass) {
1538 Opc = X86::ST_FpP80m; // pops
1539 } else if (RC == &X86::RFP64RegClass) {
1540 Opc = X86::ST_Fp64m;
1541 } else if (RC == &X86::RFP32RegClass) {
1542 Opc = X86::ST_Fp32m;
1543 } else if (RC == &X86::FR32RegClass) {
1545 } else if (RC == &X86::FR64RegClass) {
1547 } else if (RC == &X86::VR128RegClass) {
1548 // FIXME: Use movaps once we are capable of selectively
1549 // aligning functions that spill SSE registers on 16-byte boundaries.
1550 Opc = StackAlign >= 16 ? X86::MOVAPSmr : X86::MOVUPSmr;
1551 } else if (RC == &X86::VR64RegClass) {
1552 Opc = X86::MMX_MOVQ64mr;
1554 assert(0 && "Unknown regclass");
1561 void X86InstrInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
1562 MachineBasicBlock::iterator MI,
1563 unsigned SrcReg, bool isKill, int FrameIdx,
1564 const TargetRegisterClass *RC) const {
1565 unsigned Opc = getStoreRegOpcode(RC, RI.getStackAlignment());
1566 addFrameReference(BuildMI(MBB, MI, get(Opc)), FrameIdx)
1567 .addReg(SrcReg, false, false, isKill);
1570 void X86InstrInfo::storeRegToAddr(MachineFunction &MF, unsigned SrcReg,
1572 SmallVectorImpl<MachineOperand> &Addr,
1573 const TargetRegisterClass *RC,
1574 SmallVectorImpl<MachineInstr*> &NewMIs) const {
1575 unsigned Opc = getStoreRegOpcode(RC, RI.getStackAlignment());
1576 MachineInstrBuilder MIB = BuildMI(get(Opc));
1577 for (unsigned i = 0, e = Addr.size(); i != e; ++i)
1578 MIB = X86InstrAddOperand(MIB, Addr[i]);
1579 MIB.addReg(SrcReg, false, false, isKill);
1580 NewMIs.push_back(MIB);
1583 static unsigned getLoadRegOpcode(const TargetRegisterClass *RC,
1584 unsigned StackAlign) {
1586 if (RC == &X86::GR64RegClass) {
1588 } else if (RC == &X86::GR32RegClass) {
1590 } else if (RC == &X86::GR16RegClass) {
1592 } else if (RC == &X86::GR8RegClass) {
1594 } else if (RC == &X86::GR32_RegClass) {
1595 Opc = X86::MOV32_rm;
1596 } else if (RC == &X86::GR16_RegClass) {
1597 Opc = X86::MOV16_rm;
1598 } else if (RC == &X86::RFP80RegClass) {
1599 Opc = X86::LD_Fp80m;
1600 } else if (RC == &X86::RFP64RegClass) {
1601 Opc = X86::LD_Fp64m;
1602 } else if (RC == &X86::RFP32RegClass) {
1603 Opc = X86::LD_Fp32m;
1604 } else if (RC == &X86::FR32RegClass) {
1606 } else if (RC == &X86::FR64RegClass) {
1608 } else if (RC == &X86::VR128RegClass) {
1609 // FIXME: Use movaps once we are capable of selectively
1610 // aligning functions that spill SSE registers on 16-byte boundaries.
1611 Opc = StackAlign >= 16 ? X86::MOVAPSrm : X86::MOVUPSrm;
1612 } else if (RC == &X86::VR64RegClass) {
1613 Opc = X86::MMX_MOVQ64rm;
1615 assert(0 && "Unknown regclass");
1622 void X86InstrInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
1623 MachineBasicBlock::iterator MI,
1624 unsigned DestReg, int FrameIdx,
1625 const TargetRegisterClass *RC) const{
1626 unsigned Opc = getLoadRegOpcode(RC, RI.getStackAlignment());
1627 addFrameReference(BuildMI(MBB, MI, get(Opc), DestReg), FrameIdx);
1630 void X86InstrInfo::loadRegFromAddr(MachineFunction &MF, unsigned DestReg,
1631 SmallVectorImpl<MachineOperand> &Addr,
1632 const TargetRegisterClass *RC,
1633 SmallVectorImpl<MachineInstr*> &NewMIs) const {
1634 unsigned Opc = getLoadRegOpcode(RC, RI.getStackAlignment());
1635 MachineInstrBuilder MIB = BuildMI(get(Opc), DestReg);
1636 for (unsigned i = 0, e = Addr.size(); i != e; ++i)
1637 MIB = X86InstrAddOperand(MIB, Addr[i]);
1638 NewMIs.push_back(MIB);
1641 bool X86InstrInfo::spillCalleeSavedRegisters(MachineBasicBlock &MBB,
1642 MachineBasicBlock::iterator MI,
1643 const std::vector<CalleeSavedInfo> &CSI) const {
1647 bool is64Bit = TM.getSubtarget<X86Subtarget>().is64Bit();
1648 unsigned SlotSize = is64Bit ? 8 : 4;
1650 MachineFunction &MF = *MBB.getParent();
1651 X86MachineFunctionInfo *X86FI = MF.getInfo<X86MachineFunctionInfo>();
1652 X86FI->setCalleeSavedFrameSize(CSI.size() * SlotSize);
1654 unsigned Opc = is64Bit ? X86::PUSH64r : X86::PUSH32r;
1655 for (unsigned i = CSI.size(); i != 0; --i) {
1656 unsigned Reg = CSI[i-1].getReg();
1657 // Add the callee-saved register as live-in. It's killed at the spill.
1659 BuildMI(MBB, MI, get(Opc)).addReg(Reg);
1664 bool X86InstrInfo::restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
1665 MachineBasicBlock::iterator MI,
1666 const std::vector<CalleeSavedInfo> &CSI) const {
1670 bool is64Bit = TM.getSubtarget<X86Subtarget>().is64Bit();
1672 unsigned Opc = is64Bit ? X86::POP64r : X86::POP32r;
1673 for (unsigned i = 0, e = CSI.size(); i != e; ++i) {
1674 unsigned Reg = CSI[i].getReg();
1675 BuildMI(MBB, MI, get(Opc), Reg);
1680 static MachineInstr *FuseTwoAddrInst(unsigned Opcode,
1681 SmallVector<MachineOperand,4> &MOs,
1682 MachineInstr *MI, const TargetInstrInfo &TII) {
1683 // Create the base instruction with the memory operand as the first part.
1684 MachineInstr *NewMI = new MachineInstr(TII.get(Opcode), true);
1685 MachineInstrBuilder MIB(NewMI);
1686 unsigned NumAddrOps = MOs.size();
1687 for (unsigned i = 0; i != NumAddrOps; ++i)
1688 MIB = X86InstrAddOperand(MIB, MOs[i]);
1689 if (NumAddrOps < 4) // FrameIndex only
1690 MIB.addImm(1).addReg(0).addImm(0);
1692 // Loop over the rest of the ri operands, converting them over.
1693 unsigned NumOps = MI->getDesc().getNumOperands()-2;
1694 for (unsigned i = 0; i != NumOps; ++i) {
1695 MachineOperand &MO = MI->getOperand(i+2);
1696 MIB = X86InstrAddOperand(MIB, MO);
1698 for (unsigned i = NumOps+2, e = MI->getNumOperands(); i != e; ++i) {
1699 MachineOperand &MO = MI->getOperand(i);
1700 MIB = X86InstrAddOperand(MIB, MO);
1705 static MachineInstr *FuseInst(unsigned Opcode, unsigned OpNo,
1706 SmallVector<MachineOperand,4> &MOs,
1707 MachineInstr *MI, const TargetInstrInfo &TII) {
1708 MachineInstr *NewMI = new MachineInstr(TII.get(Opcode), true);
1709 MachineInstrBuilder MIB(NewMI);
1711 for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
1712 MachineOperand &MO = MI->getOperand(i);
1714 assert(MO.isRegister() && "Expected to fold into reg operand!");
1715 unsigned NumAddrOps = MOs.size();
1716 for (unsigned i = 0; i != NumAddrOps; ++i)
1717 MIB = X86InstrAddOperand(MIB, MOs[i]);
1718 if (NumAddrOps < 4) // FrameIndex only
1719 MIB.addImm(1).addReg(0).addImm(0);
1721 MIB = X86InstrAddOperand(MIB, MO);
1727 static MachineInstr *MakeM0Inst(const TargetInstrInfo &TII, unsigned Opcode,
1728 SmallVector<MachineOperand,4> &MOs,
1730 MachineInstrBuilder MIB = BuildMI(TII.get(Opcode));
1732 unsigned NumAddrOps = MOs.size();
1733 for (unsigned i = 0; i != NumAddrOps; ++i)
1734 MIB = X86InstrAddOperand(MIB, MOs[i]);
1735 if (NumAddrOps < 4) // FrameIndex only
1736 MIB.addImm(1).addReg(0).addImm(0);
1737 return MIB.addImm(0);
1741 X86InstrInfo::foldMemoryOperand(MachineInstr *MI, unsigned i,
1742 SmallVector<MachineOperand,4> &MOs) const {
1743 const DenseMap<unsigned*, unsigned> *OpcodeTablePtr = NULL;
1744 bool isTwoAddrFold = false;
1745 unsigned NumOps = MI->getDesc().getNumOperands();
1746 bool isTwoAddr = NumOps > 1 &&
1747 MI->getDesc().getOperandConstraint(1, TOI::TIED_TO) != -1;
1749 MachineInstr *NewMI = NULL;
1750 // Folding a memory location into the two-address part of a two-address
1751 // instruction is different than folding it other places. It requires
1752 // replacing the *two* registers with the memory location.
1753 if (isTwoAddr && NumOps >= 2 && i < 2 &&
1754 MI->getOperand(0).isRegister() &&
1755 MI->getOperand(1).isRegister() &&
1756 MI->getOperand(0).getReg() == MI->getOperand(1).getReg()) {
1757 OpcodeTablePtr = &RegOp2MemOpTable2Addr;
1758 isTwoAddrFold = true;
1759 } else if (i == 0) { // If operand 0
1760 if (MI->getOpcode() == X86::MOV16r0)
1761 NewMI = MakeM0Inst(*this, X86::MOV16mi, MOs, MI);
1762 else if (MI->getOpcode() == X86::MOV32r0)
1763 NewMI = MakeM0Inst(*this, X86::MOV32mi, MOs, MI);
1764 else if (MI->getOpcode() == X86::MOV64r0)
1765 NewMI = MakeM0Inst(*this, X86::MOV64mi32, MOs, MI);
1766 else if (MI->getOpcode() == X86::MOV8r0)
1767 NewMI = MakeM0Inst(*this, X86::MOV8mi, MOs, MI);
1769 NewMI->copyKillDeadInfo(MI);
1773 OpcodeTablePtr = &RegOp2MemOpTable0;
1774 } else if (i == 1) {
1775 OpcodeTablePtr = &RegOp2MemOpTable1;
1776 } else if (i == 2) {
1777 OpcodeTablePtr = &RegOp2MemOpTable2;
1780 // If table selected...
1781 if (OpcodeTablePtr) {
1782 // Find the Opcode to fuse
1783 DenseMap<unsigned*, unsigned>::iterator I =
1784 OpcodeTablePtr->find((unsigned*)MI->getOpcode());
1785 if (I != OpcodeTablePtr->end()) {
1787 NewMI = FuseTwoAddrInst(I->second, MOs, MI, *this);
1789 NewMI = FuseInst(I->second, i, MOs, MI, *this);
1790 NewMI->copyKillDeadInfo(MI);
1796 if (PrintFailedFusing)
1797 cerr << "We failed to fuse operand " << i << *MI;
1802 MachineInstr* X86InstrInfo::foldMemoryOperand(MachineFunction &MF,
1804 SmallVectorImpl<unsigned> &Ops,
1805 int FrameIndex) const {
1806 // Check switch flag
1807 if (NoFusing) return NULL;
1809 const MachineFrameInfo *MFI = MF.getFrameInfo();
1810 unsigned Alignment = MFI->getObjectAlignment(FrameIndex);
1811 // FIXME: Move alignment requirement into tables?
1812 if (Alignment < 16) {
1813 switch (MI->getOpcode()) {
1815 // Not always safe to fold movsd into these instructions since their load
1816 // folding variants expects the address to be 16 byte aligned.
1817 case X86::FsANDNPDrr:
1818 case X86::FsANDNPSrr:
1819 case X86::FsANDPDrr:
1820 case X86::FsANDPSrr:
1823 case X86::FsXORPDrr:
1824 case X86::FsXORPSrr:
1829 if (Ops.size() == 2 && Ops[0] == 0 && Ops[1] == 1) {
1830 unsigned NewOpc = 0;
1831 switch (MI->getOpcode()) {
1832 default: return NULL;
1833 case X86::TEST8rr: NewOpc = X86::CMP8ri; break;
1834 case X86::TEST16rr: NewOpc = X86::CMP16ri; break;
1835 case X86::TEST32rr: NewOpc = X86::CMP32ri; break;
1836 case X86::TEST64rr: NewOpc = X86::CMP64ri32; break;
1838 // Change to CMPXXri r, 0 first.
1839 MI->setDesc(get(NewOpc));
1840 MI->getOperand(1).ChangeToImmediate(0);
1841 } else if (Ops.size() != 1)
1844 SmallVector<MachineOperand,4> MOs;
1845 MOs.push_back(MachineOperand::CreateFI(FrameIndex));
1846 return foldMemoryOperand(MI, Ops[0], MOs);
1849 MachineInstr* X86InstrInfo::foldMemoryOperand(MachineFunction &MF,
1851 SmallVectorImpl<unsigned> &Ops,
1852 MachineInstr *LoadMI) const {
1853 // Check switch flag
1854 if (NoFusing) return NULL;
1856 unsigned Alignment = 0;
1857 for (unsigned i = 0, e = LoadMI->getNumMemOperands(); i != e; ++i) {
1858 const MemOperand &MRO = LoadMI->getMemOperand(i);
1859 unsigned Align = MRO.getAlignment();
1860 if (Align > Alignment)
1864 // FIXME: Move alignment requirement into tables?
1865 if (Alignment < 16) {
1866 switch (MI->getOpcode()) {
1868 // Not always safe to fold movsd into these instructions since their load
1869 // folding variants expects the address to be 16 byte aligned.
1870 case X86::FsANDNPDrr:
1871 case X86::FsANDNPSrr:
1872 case X86::FsANDPDrr:
1873 case X86::FsANDPSrr:
1876 case X86::FsXORPDrr:
1877 case X86::FsXORPSrr:
1882 if (Ops.size() == 2 && Ops[0] == 0 && Ops[1] == 1) {
1883 unsigned NewOpc = 0;
1884 switch (MI->getOpcode()) {
1885 default: return NULL;
1886 case X86::TEST8rr: NewOpc = X86::CMP8ri; break;
1887 case X86::TEST16rr: NewOpc = X86::CMP16ri; break;
1888 case X86::TEST32rr: NewOpc = X86::CMP32ri; break;
1889 case X86::TEST64rr: NewOpc = X86::CMP64ri32; break;
1891 // Change to CMPXXri r, 0 first.
1892 MI->setDesc(get(NewOpc));
1893 MI->getOperand(1).ChangeToImmediate(0);
1894 } else if (Ops.size() != 1)
1897 SmallVector<MachineOperand,4> MOs;
1898 unsigned NumOps = LoadMI->getDesc().getNumOperands();
1899 for (unsigned i = NumOps - 4; i != NumOps; ++i)
1900 MOs.push_back(LoadMI->getOperand(i));
1901 return foldMemoryOperand(MI, Ops[0], MOs);
1905 bool X86InstrInfo::canFoldMemoryOperand(MachineInstr *MI,
1906 SmallVectorImpl<unsigned> &Ops) const {
1907 // Check switch flag
1908 if (NoFusing) return 0;
1910 if (Ops.size() == 2 && Ops[0] == 0 && Ops[1] == 1) {
1911 switch (MI->getOpcode()) {
1912 default: return false;
1921 if (Ops.size() != 1)
1924 unsigned OpNum = Ops[0];
1925 unsigned Opc = MI->getOpcode();
1926 unsigned NumOps = MI->getDesc().getNumOperands();
1927 bool isTwoAddr = NumOps > 1 &&
1928 MI->getDesc().getOperandConstraint(1, TOI::TIED_TO) != -1;
1930 // Folding a memory location into the two-address part of a two-address
1931 // instruction is different than folding it other places. It requires
1932 // replacing the *two* registers with the memory location.
1933 const DenseMap<unsigned*, unsigned> *OpcodeTablePtr = NULL;
1934 if (isTwoAddr && NumOps >= 2 && OpNum < 2) {
1935 OpcodeTablePtr = &RegOp2MemOpTable2Addr;
1936 } else if (OpNum == 0) { // If operand 0
1945 OpcodeTablePtr = &RegOp2MemOpTable0;
1946 } else if (OpNum == 1) {
1947 OpcodeTablePtr = &RegOp2MemOpTable1;
1948 } else if (OpNum == 2) {
1949 OpcodeTablePtr = &RegOp2MemOpTable2;
1952 if (OpcodeTablePtr) {
1953 // Find the Opcode to fuse
1954 DenseMap<unsigned*, unsigned>::iterator I =
1955 OpcodeTablePtr->find((unsigned*)Opc);
1956 if (I != OpcodeTablePtr->end())
1962 bool X86InstrInfo::unfoldMemoryOperand(MachineFunction &MF, MachineInstr *MI,
1963 unsigned Reg, bool UnfoldLoad, bool UnfoldStore,
1964 SmallVectorImpl<MachineInstr*> &NewMIs) const {
1965 DenseMap<unsigned*, std::pair<unsigned,unsigned> >::iterator I =
1966 MemOp2RegOpTable.find((unsigned*)MI->getOpcode());
1967 if (I == MemOp2RegOpTable.end())
1969 unsigned Opc = I->second.first;
1970 unsigned Index = I->second.second & 0xf;
1971 bool FoldedLoad = I->second.second & (1 << 4);
1972 bool FoldedStore = I->second.second & (1 << 5);
1973 if (UnfoldLoad && !FoldedLoad)
1975 UnfoldLoad &= FoldedLoad;
1976 if (UnfoldStore && !FoldedStore)
1978 UnfoldStore &= FoldedStore;
1980 const TargetInstrDesc &TID = get(Opc);
1981 const TargetOperandInfo &TOI = TID.OpInfo[Index];
1982 const TargetRegisterClass *RC = TOI.isLookupPtrRegClass()
1983 ? getPointerRegClass() : RI.getRegClass(TOI.RegClass);
1984 SmallVector<MachineOperand,4> AddrOps;
1985 SmallVector<MachineOperand,2> BeforeOps;
1986 SmallVector<MachineOperand,2> AfterOps;
1987 SmallVector<MachineOperand,4> ImpOps;
1988 for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
1989 MachineOperand &Op = MI->getOperand(i);
1990 if (i >= Index && i < Index+4)
1991 AddrOps.push_back(Op);
1992 else if (Op.isRegister() && Op.isImplicit())
1993 ImpOps.push_back(Op);
1995 BeforeOps.push_back(Op);
1997 AfterOps.push_back(Op);
2000 // Emit the load instruction.
2002 loadRegFromAddr(MF, Reg, AddrOps, RC, NewMIs);
2004 // Address operands cannot be marked isKill.
2005 for (unsigned i = 1; i != 5; ++i) {
2006 MachineOperand &MO = NewMIs[0]->getOperand(i);
2007 if (MO.isRegister())
2008 MO.setIsKill(false);
2013 // Emit the data processing instruction.
2014 MachineInstr *DataMI = new MachineInstr(TID, true);
2015 MachineInstrBuilder MIB(DataMI);
2018 MIB.addReg(Reg, true);
2019 for (unsigned i = 0, e = BeforeOps.size(); i != e; ++i)
2020 MIB = X86InstrAddOperand(MIB, BeforeOps[i]);
2023 for (unsigned i = 0, e = AfterOps.size(); i != e; ++i)
2024 MIB = X86InstrAddOperand(MIB, AfterOps[i]);
2025 for (unsigned i = 0, e = ImpOps.size(); i != e; ++i) {
2026 MachineOperand &MO = ImpOps[i];
2027 MIB.addReg(MO.getReg(), MO.isDef(), true, MO.isKill(), MO.isDead());
2029 // Change CMP32ri r, 0 back to TEST32rr r, r, etc.
2030 unsigned NewOpc = 0;
2031 switch (DataMI->getOpcode()) {
2033 case X86::CMP64ri32:
2037 MachineOperand &MO0 = DataMI->getOperand(0);
2038 MachineOperand &MO1 = DataMI->getOperand(1);
2039 if (MO1.getImm() == 0) {
2040 switch (DataMI->getOpcode()) {
2042 case X86::CMP64ri32: NewOpc = X86::TEST64rr; break;
2043 case X86::CMP32ri: NewOpc = X86::TEST32rr; break;
2044 case X86::CMP16ri: NewOpc = X86::TEST16rr; break;
2045 case X86::CMP8ri: NewOpc = X86::TEST8rr; break;
2047 DataMI->setDesc(get(NewOpc));
2048 MO1.ChangeToRegister(MO0.getReg(), false);
2052 NewMIs.push_back(DataMI);
2054 // Emit the store instruction.
2056 const TargetOperandInfo &DstTOI = TID.OpInfo[0];
2057 const TargetRegisterClass *DstRC = DstTOI.isLookupPtrRegClass()
2058 ? getPointerRegClass() : RI.getRegClass(DstTOI.RegClass);
2059 storeRegToAddr(MF, Reg, true, AddrOps, DstRC, NewMIs);
2066 X86InstrInfo::unfoldMemoryOperand(SelectionDAG &DAG, SDNode *N,
2067 SmallVectorImpl<SDNode*> &NewNodes) const {
2068 if (!N->isTargetOpcode())
2071 DenseMap<unsigned*, std::pair<unsigned,unsigned> >::iterator I =
2072 MemOp2RegOpTable.find((unsigned*)N->getTargetOpcode());
2073 if (I == MemOp2RegOpTable.end())
2075 unsigned Opc = I->second.first;
2076 unsigned Index = I->second.second & 0xf;
2077 bool FoldedLoad = I->second.second & (1 << 4);
2078 bool FoldedStore = I->second.second & (1 << 5);
2079 const TargetInstrDesc &TID = get(Opc);
2080 const TargetOperandInfo &TOI = TID.OpInfo[Index];
2081 const TargetRegisterClass *RC = TOI.isLookupPtrRegClass()
2082 ? getPointerRegClass() : RI.getRegClass(TOI.RegClass);
2083 std::vector<SDOperand> AddrOps;
2084 std::vector<SDOperand> BeforeOps;
2085 std::vector<SDOperand> AfterOps;
2086 unsigned NumOps = N->getNumOperands();
2087 for (unsigned i = 0; i != NumOps-1; ++i) {
2088 SDOperand Op = N->getOperand(i);
2089 if (i >= Index && i < Index+4)
2090 AddrOps.push_back(Op);
2092 BeforeOps.push_back(Op);
2094 AfterOps.push_back(Op);
2096 SDOperand Chain = N->getOperand(NumOps-1);
2097 AddrOps.push_back(Chain);
2099 // Emit the load instruction.
2102 MVT::ValueType VT = *RC->vt_begin();
2103 Load = DAG.getTargetNode(getLoadRegOpcode(RC, RI.getStackAlignment()), VT,
2104 MVT::Other, &AddrOps[0], AddrOps.size());
2105 NewNodes.push_back(Load);
2108 // Emit the data processing instruction.
2109 std::vector<MVT::ValueType> VTs;
2110 const TargetRegisterClass *DstRC = 0;
2111 if (TID.getNumDefs() > 0) {
2112 const TargetOperandInfo &DstTOI = TID.OpInfo[0];
2113 DstRC = DstTOI.isLookupPtrRegClass()
2114 ? getPointerRegClass() : RI.getRegClass(DstTOI.RegClass);
2115 VTs.push_back(*DstRC->vt_begin());
2117 for (unsigned i = 0, e = N->getNumValues(); i != e; ++i) {
2118 MVT::ValueType VT = N->getValueType(i);
2119 if (VT != MVT::Other && i >= (unsigned)TID.getNumDefs())
2123 BeforeOps.push_back(SDOperand(Load, 0));
2124 std::copy(AfterOps.begin(), AfterOps.end(), std::back_inserter(BeforeOps));
2125 SDNode *NewNode= DAG.getTargetNode(Opc, VTs, &BeforeOps[0], BeforeOps.size());
2126 NewNodes.push_back(NewNode);
2128 // Emit the store instruction.
2131 AddrOps.push_back(SDOperand(NewNode, 0));
2132 AddrOps.push_back(Chain);
2133 SDNode *Store = DAG.getTargetNode(getStoreRegOpcode(DstRC, RI.getStackAlignment()),
2134 MVT::Other, &AddrOps[0], AddrOps.size());
2135 NewNodes.push_back(Store);
2141 unsigned X86InstrInfo::getOpcodeAfterMemoryUnfold(unsigned Opc,
2142 bool UnfoldLoad, bool UnfoldStore) const {
2143 DenseMap<unsigned*, std::pair<unsigned,unsigned> >::iterator I =
2144 MemOp2RegOpTable.find((unsigned*)Opc);
2145 if (I == MemOp2RegOpTable.end())
2147 bool FoldedLoad = I->second.second & (1 << 4);
2148 bool FoldedStore = I->second.second & (1 << 5);
2149 if (UnfoldLoad && !FoldedLoad)
2151 if (UnfoldStore && !FoldedStore)
2153 return I->second.first;
2156 bool X86InstrInfo::BlockHasNoFallThrough(MachineBasicBlock &MBB) const {
2157 if (MBB.empty()) return false;
2159 switch (MBB.back().getOpcode()) {
2160 case X86::TCRETURNri:
2161 case X86::TCRETURNdi:
2162 case X86::RET: // Return.
2167 case X86::JMP: // Uncond branch.
2168 case X86::JMP32r: // Indirect branch.
2169 case X86::JMP64r: // Indirect branch (64-bit).
2170 case X86::JMP32m: // Indirect branch through mem.
2171 case X86::JMP64m: // Indirect branch through mem (64-bit).
2173 default: return false;
2178 ReverseBranchCondition(std::vector<MachineOperand> &Cond) const {
2179 assert(Cond.size() == 1 && "Invalid X86 branch condition!");
2180 Cond[0].setImm(GetOppositeBranchCondition((X86::CondCode)Cond[0].getImm()));
2184 const TargetRegisterClass *X86InstrInfo::getPointerRegClass() const {
2185 const X86Subtarget *Subtarget = &TM.getSubtarget<X86Subtarget>();
2186 if (Subtarget->is64Bit())
2187 return &X86::GR64RegClass;
2189 return &X86::GR32RegClass;