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Chandler Carruth7132e002007-08-04 01:51:18 +00001//===-- AutoUpgrade.cpp - Implement auto-upgrade helper functions ---------===//
2//
3// The LLVM Compiler Infrastructure
4//
Chris Lattnerf3ebc3f2007-12-29 20:36:04 +00005// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
Chandler Carruth7132e002007-08-04 01:51:18 +00007//
8//===----------------------------------------------------------------------===//
9//
Matt Arsenaultc4c92262013-07-20 17:46:00 +000010// This file implements the auto-upgrade helper functions
Chandler Carruth7132e002007-08-04 01:51:18 +000011//
12//===----------------------------------------------------------------------===//
13
Chandler Carruth91065212014-03-05 10:34:14 +000014#include "llvm/IR/AutoUpgrade.h"
Chandler Carruth1305dc32014-03-04 11:45:46 +000015#include "llvm/IR/CFG.h"
Chandler Carruth219b89b2014-03-04 11:01:28 +000016#include "llvm/IR/CallSite.h"
Chandler Carruth9fb823b2013-01-02 11:36:10 +000017#include "llvm/IR/Constants.h"
Chandler Carruthd9903882015-01-14 11:23:27 +000018#include "llvm/IR/DIBuilder.h"
Chandler Carruth9a4c9e52014-03-06 00:46:21 +000019#include "llvm/IR/DebugInfo.h"
Manman Ren2ebfb422014-01-16 01:51:12 +000020#include "llvm/IR/DiagnosticInfo.h"
Chandler Carruth9fb823b2013-01-02 11:36:10 +000021#include "llvm/IR/Function.h"
22#include "llvm/IR/IRBuilder.h"
23#include "llvm/IR/Instruction.h"
24#include "llvm/IR/IntrinsicInst.h"
25#include "llvm/IR/LLVMContext.h"
26#include "llvm/IR/Module.h"
Torok Edwin56d06592009-07-11 20:10:48 +000027#include "llvm/Support/ErrorHandling.h"
Anton Korobeynikov579f0712008-02-20 11:08:44 +000028#include <cstring>
Chandler Carruth7132e002007-08-04 01:51:18 +000029using namespace llvm;
30
Nadav Rotem17ee58a2012-06-10 18:42:51 +000031// Upgrade the declarations of the SSE4.1 functions whose arguments have
32// changed their type from v4f32 to v2i64.
33static bool UpgradeSSE41Function(Function* F, Intrinsic::ID IID,
34 Function *&NewFn) {
35 // Check whether this is an old version of the function, which received
36 // v4f32 arguments.
37 Type *Arg0Type = F->getFunctionType()->getParamType(0);
38 if (Arg0Type != VectorType::get(Type::getFloatTy(F->getContext()), 4))
39 return false;
40
41 // Yes, it's old, replace it with new version.
42 F->setName(F->getName() + ".old");
43 NewFn = Intrinsic::getDeclaration(F->getParent(), IID);
44 return true;
45}
Chandler Carruth7132e002007-08-04 01:51:18 +000046
Chandler Carruth373b2b12014-09-06 10:00:01 +000047// Upgrade the declarations of intrinsic functions whose 8-bit immediate mask
48// arguments have changed their type from i32 to i8.
49static bool UpgradeX86IntrinsicsWith8BitMask(Function *F, Intrinsic::ID IID,
50 Function *&NewFn) {
51 // Check that the last argument is an i32.
52 Type *LastArgType = F->getFunctionType()->getParamType(
53 F->getFunctionType()->getNumParams() - 1);
54 if (!LastArgType->isIntegerTy(32))
55 return false;
56
57 // Move this function aside and map down.
58 F->setName(F->getName() + ".old");
59 NewFn = Intrinsic::getDeclaration(F->getParent(), IID);
60 return true;
61}
62
Craig Topperf4bf9112015-01-19 06:07:27 +000063// Upgrade the declarations of AVX-512 cmp intrinsic functions whose 8-bit
64// immediates have changed their type from i32 to i8.
65static bool UpgradeAVX512CmpIntrinsic(Function *F, Intrinsic::ID IID,
66 Function *&NewFn) {
67 // Check that the last argument is an i32.
68 Type *LastArgType = F->getFunctionType()->getParamType(2);
69 if (!LastArgType->isIntegerTy(32))
70 return false;
71
72 // Move this function aside and map down.
73 F->setName(F->getName() + ".old");
74 NewFn = Intrinsic::getDeclaration(F->getParent(), IID);
75 return true;
76}
77
Evan Cheng0e179d02007-12-17 22:33:23 +000078static bool UpgradeIntrinsicFunction1(Function *F, Function *&NewFn) {
Chandler Carruth7132e002007-08-04 01:51:18 +000079 assert(F && "Illegal to upgrade a non-existent Function.");
80
Chandler Carruth7132e002007-08-04 01:51:18 +000081 // Quickly eliminate it, if it's not a candidate.
Chris Lattnerb372f662011-06-18 18:56:39 +000082 StringRef Name = F->getName();
83 if (Name.size() <= 8 || !Name.startswith("llvm."))
Evan Cheng0e179d02007-12-17 22:33:23 +000084 return false;
Chris Lattnerb372f662011-06-18 18:56:39 +000085 Name = Name.substr(5); // Strip off "llvm."
Chris Lattner0bcbde42011-11-27 08:42:07 +000086
Chris Lattnerb372f662011-06-18 18:56:39 +000087 switch (Name[0]) {
Chandler Carruth7132e002007-08-04 01:51:18 +000088 default: break;
Joel Jones43cb8782012-07-13 23:25:25 +000089 case 'a': {
90 if (Name.startswith("arm.neon.vclz")) {
91 Type* args[2] = {
Matt Arsenaultc4c92262013-07-20 17:46:00 +000092 F->arg_begin()->getType(),
Joel Jones43cb8782012-07-13 23:25:25 +000093 Type::getInt1Ty(F->getContext())
94 };
95 // Can't use Intrinsic::getDeclaration here as it adds a ".i1" to
96 // the end of the name. Change name from llvm.arm.neon.vclz.* to
97 // llvm.ctlz.*
98 FunctionType* fType = FunctionType::get(F->getReturnType(), args, false);
Matt Arsenaultc4c92262013-07-20 17:46:00 +000099 NewFn = Function::Create(fType, F->getLinkage(),
Joel Jones43cb8782012-07-13 23:25:25 +0000100 "llvm.ctlz." + Name.substr(14), F->getParent());
101 return true;
102 }
Joel Jonesb84f7be2012-07-18 00:02:16 +0000103 if (Name.startswith("arm.neon.vcnt")) {
104 NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::ctpop,
105 F->arg_begin()->getType());
106 return true;
107 }
Joel Jones43cb8782012-07-13 23:25:25 +0000108 break;
109 }
Chandler Carruth58a71ed2011-12-12 04:26:04 +0000110 case 'c': {
Chandler Carruth58a71ed2011-12-12 04:26:04 +0000111 if (Name.startswith("ctlz.") && F->arg_size() == 1) {
112 F->setName(Name + ".old");
Chandler Carruthd4a02402011-12-12 10:57:20 +0000113 NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::ctlz,
114 F->arg_begin()->getType());
Chandler Carruth58a71ed2011-12-12 04:26:04 +0000115 return true;
116 }
117 if (Name.startswith("cttz.") && F->arg_size() == 1) {
118 F->setName(Name + ".old");
Chandler Carruthd4a02402011-12-12 10:57:20 +0000119 NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::cttz,
120 F->arg_begin()->getType());
Chandler Carruth58a71ed2011-12-12 04:26:04 +0000121 return true;
122 }
123 break;
124 }
Adrian Prantl87b7eb92014-10-01 18:55:02 +0000125 case 'd': {
126 if (Name.startswith("dbg.declare") && F->arg_size() == 2) {
127 F->setName(Name + ".old");
128 NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::dbg_declare);
129 return true;
130 }
131 if (Name.startswith("dbg.value") && F->arg_size() == 3) {
132 F->setName(Name + ".old");
133 NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::dbg_value);
134 return true;
135 }
136 break;
137 }
138
Matt Arsenaultfbcbce42013-10-07 18:06:48 +0000139 case 'o':
140 // We only need to change the name to match the mangling including the
141 // address space.
142 if (F->arg_size() == 2 && Name.startswith("objectsize.")) {
143 Type *Tys[2] = { F->getReturnType(), F->arg_begin()->getType() };
144 if (F->getName() != Intrinsic::getName(Intrinsic::objectsize, Tys)) {
145 F->setName(Name + ".old");
146 NewFn = Intrinsic::getDeclaration(F->getParent(),
147 Intrinsic::objectsize, Tys);
148 return true;
149 }
150 }
151 break;
152
Craig Topper3b1817d2012-02-03 06:10:55 +0000153 case 'x': {
154 if (Name.startswith("x86.sse2.pcmpeq.") ||
155 Name.startswith("x86.sse2.pcmpgt.") ||
156 Name.startswith("x86.avx2.pcmpeq.") ||
Craig Topperd3c9e402012-04-18 05:24:00 +0000157 Name.startswith("x86.avx2.pcmpgt.") ||
Craig Topper7daf8972012-05-08 06:58:15 +0000158 Name.startswith("x86.avx.vpermil.") ||
159 Name == "x86.avx.movnt.dq.256" ||
160 Name == "x86.avx.movnt.pd.256" ||
Craig Topper3352ba52012-06-09 16:46:13 +0000161 Name == "x86.avx.movnt.ps.256" ||
Craig Topperef9e9932013-10-15 05:20:47 +0000162 Name == "x86.sse42.crc32.64.8" ||
Adam Nemet39066802014-05-29 23:35:33 +0000163 Name == "x86.avx.vbroadcast.ss" ||
164 Name == "x86.avx.vbroadcast.ss.256" ||
165 Name == "x86.avx.vbroadcast.sd.256" ||
Craig Topperb324e432015-02-18 06:24:44 +0000166 Name == "x86.sse2.psll.dq" ||
167 Name == "x86.sse2.psrl.dq" ||
168 Name == "x86.avx2.psll.dq" ||
169 Name == "x86.avx2.psrl.dq" ||
Craig Topper4e0700f2015-02-13 06:07:24 +0000170 Name == "x86.sse2.psll.dq.bs" ||
171 Name == "x86.sse2.psrl.dq.bs" ||
Craig Topper44026ef2015-02-16 20:51:59 +0000172 Name == "x86.avx2.psll.dq.bs" ||
173 Name == "x86.avx2.psrl.dq.bs" ||
Craig Topper782d6202015-02-28 19:33:17 +0000174 Name == "x86.sse41.pblendw" ||
175 Name == "x86.sse41.blendpd" ||
176 Name == "x86.sse41.blendps" ||
177 Name == "x86.avx.blend.pd.256" ||
178 Name == "x86.avx.blend.ps.256" ||
179 Name == "x86.avx2.pblendw" ||
180 Name == "x86.avx2.pblendd.128" ||
181 Name == "x86.avx2.pblendd.256" ||
Juergen Ributzka1f7a1762015-03-04 00:13:25 +0000182 Name == "x86.avx2.vbroadcasti128" ||
Craig Topper3352ba52012-06-09 16:46:13 +0000183 (Name.startswith("x86.xop.vpcom") && F->arg_size() == 2)) {
Craig Topperc6207612014-04-09 06:08:46 +0000184 NewFn = nullptr;
Craig Topper3b1817d2012-02-03 06:10:55 +0000185 return true;
186 }
Nadav Rotem17ee58a2012-06-10 18:42:51 +0000187 // SSE4.1 ptest functions may have an old signature.
188 if (Name.startswith("x86.sse41.ptest")) {
189 if (Name == "x86.sse41.ptestc")
190 return UpgradeSSE41Function(F, Intrinsic::x86_sse41_ptestc, NewFn);
191 if (Name == "x86.sse41.ptestz")
192 return UpgradeSSE41Function(F, Intrinsic::x86_sse41_ptestz, NewFn);
193 if (Name == "x86.sse41.ptestnzc")
194 return UpgradeSSE41Function(F, Intrinsic::x86_sse41_ptestnzc, NewFn);
195 }
Sanjay Patel1c3eaec2015-02-28 22:25:06 +0000196 // Several blend and other instructions with masks used the wrong number of
Chandler Carruth373b2b12014-09-06 10:00:01 +0000197 // bits.
Chandler Carruth373b2b12014-09-06 10:00:01 +0000198 if (Name == "x86.sse41.insertps")
199 return UpgradeX86IntrinsicsWith8BitMask(F, Intrinsic::x86_sse41_insertps,
200 NewFn);
201 if (Name == "x86.sse41.dppd")
202 return UpgradeX86IntrinsicsWith8BitMask(F, Intrinsic::x86_sse41_dppd,
203 NewFn);
204 if (Name == "x86.sse41.dpps")
205 return UpgradeX86IntrinsicsWith8BitMask(F, Intrinsic::x86_sse41_dpps,
206 NewFn);
207 if (Name == "x86.sse41.mpsadbw")
208 return UpgradeX86IntrinsicsWith8BitMask(F, Intrinsic::x86_sse41_mpsadbw,
209 NewFn);
Chandler Carruth373b2b12014-09-06 10:00:01 +0000210 if (Name == "x86.avx.dp.ps.256")
211 return UpgradeX86IntrinsicsWith8BitMask(F, Intrinsic::x86_avx_dp_ps_256,
212 NewFn);
Chandler Carruth373b2b12014-09-06 10:00:01 +0000213 if (Name == "x86.avx2.mpsadbw")
214 return UpgradeX86IntrinsicsWith8BitMask(F, Intrinsic::x86_avx2_mpsadbw,
215 NewFn);
216
Craig Topperf4bf9112015-01-19 06:07:27 +0000217 if (Name == "x86.avx512.mask.cmp.ps.512")
218 return UpgradeAVX512CmpIntrinsic(F, Intrinsic::x86_avx512_mask_cmp_ps_512,
219 NewFn);
220 if (Name == "x86.avx512.mask.cmp.pd.512")
221 return UpgradeAVX512CmpIntrinsic(F, Intrinsic::x86_avx512_mask_cmp_pd_512,
222 NewFn);
223
Craig Topper29f2e952015-01-25 23:26:02 +0000224 if (Name == "x86.avx512.mask.cmp.b.512")
225 return UpgradeAVX512CmpIntrinsic(F, Intrinsic::x86_avx512_mask_cmp_b_512,
226 NewFn);
227 if (Name == "x86.avx512.mask.cmp.w.512")
228 return UpgradeAVX512CmpIntrinsic(F, Intrinsic::x86_avx512_mask_cmp_w_512,
229 NewFn);
230 if (Name == "x86.avx512.mask.cmp.d.512")
231 return UpgradeAVX512CmpIntrinsic(F, Intrinsic::x86_avx512_mask_cmp_d_512,
232 NewFn);
233 if (Name == "x86.avx512.mask.cmp.q.512")
234 return UpgradeAVX512CmpIntrinsic(F, Intrinsic::x86_avx512_mask_cmp_q_512,
235 NewFn);
236 if (Name == "x86.avx512.mask.ucmp.b.512")
237 return UpgradeAVX512CmpIntrinsic(F, Intrinsic::x86_avx512_mask_ucmp_b_512,
238 NewFn);
239 if (Name == "x86.avx512.mask.ucmp.w.512")
240 return UpgradeAVX512CmpIntrinsic(F, Intrinsic::x86_avx512_mask_ucmp_w_512,
241 NewFn);
242 if (Name == "x86.avx512.mask.ucmp.d.512")
243 return UpgradeAVX512CmpIntrinsic(F, Intrinsic::x86_avx512_mask_ucmp_d_512,
244 NewFn);
245 if (Name == "x86.avx512.mask.ucmp.q.512")
246 return UpgradeAVX512CmpIntrinsic(F, Intrinsic::x86_avx512_mask_ucmp_q_512,
247 NewFn);
248
249 if (Name == "x86.avx512.mask.cmp.b.256")
250 return UpgradeAVX512CmpIntrinsic(F, Intrinsic::x86_avx512_mask_cmp_b_256,
251 NewFn);
252 if (Name == "x86.avx512.mask.cmp.w.256")
253 return UpgradeAVX512CmpIntrinsic(F, Intrinsic::x86_avx512_mask_cmp_w_256,
254 NewFn);
255 if (Name == "x86.avx512.mask.cmp.d.256")
256 return UpgradeAVX512CmpIntrinsic(F, Intrinsic::x86_avx512_mask_cmp_d_256,
257 NewFn);
258 if (Name == "x86.avx512.mask.cmp.q.256")
259 return UpgradeAVX512CmpIntrinsic(F, Intrinsic::x86_avx512_mask_cmp_q_256,
260 NewFn);
261 if (Name == "x86.avx512.mask.ucmp.b.256")
262 return UpgradeAVX512CmpIntrinsic(F, Intrinsic::x86_avx512_mask_ucmp_b_256,
263 NewFn);
264 if (Name == "x86.avx512.mask.ucmp.w.256")
265 return UpgradeAVX512CmpIntrinsic(F, Intrinsic::x86_avx512_mask_ucmp_w_256,
266 NewFn);
267 if (Name == "x86.avx512.mask.ucmp.d.256")
268 return UpgradeAVX512CmpIntrinsic(F, Intrinsic::x86_avx512_mask_ucmp_d_256,
269 NewFn);
270 if (Name == "x86.avx512.mask.ucmp.q.256")
271 return UpgradeAVX512CmpIntrinsic(F, Intrinsic::x86_avx512_mask_ucmp_q_256,
272 NewFn);
273
274 if (Name == "x86.avx512.mask.cmp.b.128")
275 return UpgradeAVX512CmpIntrinsic(F, Intrinsic::x86_avx512_mask_cmp_b_128,
276 NewFn);
277 if (Name == "x86.avx512.mask.cmp.w.128")
278 return UpgradeAVX512CmpIntrinsic(F, Intrinsic::x86_avx512_mask_cmp_w_128,
279 NewFn);
280 if (Name == "x86.avx512.mask.cmp.d.128")
281 return UpgradeAVX512CmpIntrinsic(F, Intrinsic::x86_avx512_mask_cmp_d_128,
282 NewFn);
283 if (Name == "x86.avx512.mask.cmp.q.128")
284 return UpgradeAVX512CmpIntrinsic(F, Intrinsic::x86_avx512_mask_cmp_q_128,
285 NewFn);
286 if (Name == "x86.avx512.mask.ucmp.b.128")
287 return UpgradeAVX512CmpIntrinsic(F, Intrinsic::x86_avx512_mask_ucmp_b_128,
288 NewFn);
289 if (Name == "x86.avx512.mask.ucmp.w.128")
290 return UpgradeAVX512CmpIntrinsic(F, Intrinsic::x86_avx512_mask_ucmp_w_128,
291 NewFn);
292 if (Name == "x86.avx512.mask.ucmp.d.128")
293 return UpgradeAVX512CmpIntrinsic(F, Intrinsic::x86_avx512_mask_ucmp_d_128,
294 NewFn);
295 if (Name == "x86.avx512.mask.ucmp.q.128")
296 return UpgradeAVX512CmpIntrinsic(F, Intrinsic::x86_avx512_mask_ucmp_q_128,
297 NewFn);
298
Craig Topper71dc02d2012-06-13 07:18:53 +0000299 // frcz.ss/sd may need to have an argument dropped
300 if (Name.startswith("x86.xop.vfrcz.ss") && F->arg_size() == 2) {
301 F->setName(Name + ".old");
302 NewFn = Intrinsic::getDeclaration(F->getParent(),
303 Intrinsic::x86_xop_vfrcz_ss);
304 return true;
305 }
306 if (Name.startswith("x86.xop.vfrcz.sd") && F->arg_size() == 2) {
307 F->setName(Name + ".old");
308 NewFn = Intrinsic::getDeclaration(F->getParent(),
309 Intrinsic::x86_xop_vfrcz_sd);
310 return true;
311 }
Craig Topper720c7bd2012-06-03 08:07:25 +0000312 // Fix the FMA4 intrinsics to remove the 4
313 if (Name.startswith("x86.fma4.")) {
Craig Topper2c5ccd82012-06-03 16:48:52 +0000314 F->setName("llvm.x86.fma" + Name.substr(8));
315 NewFn = F;
316 return true;
Craig Topper720c7bd2012-06-03 08:07:25 +0000317 }
Craig Topper3b1817d2012-02-03 06:10:55 +0000318 break;
319 }
Chris Lattnerb372f662011-06-18 18:56:39 +0000320 }
Chandler Carruth7132e002007-08-04 01:51:18 +0000321
Nadav Rotem17ee58a2012-06-10 18:42:51 +0000322 // This may not belong here. This function is effectively being overloaded
323 // to both detect an intrinsic which needs upgrading, and to provide the
324 // upgraded form of the intrinsic. We should perhaps have two separate
Chandler Carruth7132e002007-08-04 01:51:18 +0000325 // functions for this.
Evan Cheng0e179d02007-12-17 22:33:23 +0000326 return false;
Chandler Carruth7132e002007-08-04 01:51:18 +0000327}
328
Evan Cheng0e179d02007-12-17 22:33:23 +0000329bool llvm::UpgradeIntrinsicFunction(Function *F, Function *&NewFn) {
Craig Topperc6207612014-04-09 06:08:46 +0000330 NewFn = nullptr;
Evan Cheng0e179d02007-12-17 22:33:23 +0000331 bool Upgraded = UpgradeIntrinsicFunction1(F, NewFn);
Duncan Sands38ef3a82007-12-03 20:06:50 +0000332
333 // Upgrade intrinsic attributes. This does not change the function.
Evan Cheng0e179d02007-12-17 22:33:23 +0000334 if (NewFn)
335 F = NewFn;
Dale Johannesenb842d522009-02-05 01:49:45 +0000336 if (unsigned id = F->getIntrinsicID())
Bill Wendlingd079a442012-10-15 04:46:55 +0000337 F->setAttributes(Intrinsic::getAttributes(F->getContext(),
338 (Intrinsic::ID)id));
Duncan Sands38ef3a82007-12-03 20:06:50 +0000339 return Upgraded;
340}
341
Bill Wendlinge26fffc2010-09-10 18:51:56 +0000342bool llvm::UpgradeGlobalVariable(GlobalVariable *GV) {
Chris Lattner80ed9dc2011-06-18 06:05:24 +0000343 // Nothing to do yet.
Bill Wendlinge26fffc2010-09-10 18:51:56 +0000344 return false;
345}
346
Adrian Prantl87b7eb92014-10-01 18:55:02 +0000347static MDNode *getNodeField(const MDNode *DbgNode, unsigned Elt) {
348 if (!DbgNode || Elt >= DbgNode->getNumOperands())
349 return nullptr;
350 return dyn_cast_or_null<MDNode>(DbgNode->getOperand(Elt));
351}
352
Duncan P. N. Exon Smith5bf8fef2014-12-09 18:38:53 +0000353static MetadataAsValue *getExpression(Value *VarOperand, Function *F) {
Adrian Prantl87b7eb92014-10-01 18:55:02 +0000354 // Old-style DIVariables have an optional expression as the 8th element.
Duncan P. N. Exon Smith5bf8fef2014-12-09 18:38:53 +0000355 DIExpression Expr(getNodeField(
356 cast<MDNode>(cast<MetadataAsValue>(VarOperand)->getMetadata()), 8));
Adrian Prantl87b7eb92014-10-01 18:55:02 +0000357 if (!Expr) {
Duncan P. N. Exon Smith5bf8fef2014-12-09 18:38:53 +0000358 DIBuilder DIB(*F->getParent(), /*AllowUnresolved*/ false);
Adrian Prantl87b7eb92014-10-01 18:55:02 +0000359 Expr = DIB.createExpression();
360 }
Duncan P. N. Exon Smith5bf8fef2014-12-09 18:38:53 +0000361 return MetadataAsValue::get(F->getContext(), Expr);
Adrian Prantl87b7eb92014-10-01 18:55:02 +0000362}
363
Craig Topperb324e432015-02-18 06:24:44 +0000364// Handles upgrading SSE2 and AVX2 PSLLDQ intrinsics by converting them
365// to byte shuffles.
366static Value *UpgradeX86PSLLDQIntrinsics(IRBuilder<> &Builder, LLVMContext &C,
367 Value *Op, unsigned NumLanes,
368 unsigned Shift) {
369 // Each lane is 16 bytes.
370 unsigned NumElts = NumLanes * 16;
371
372 // Bitcast from a 64-bit element type to a byte element type.
373 Op = Builder.CreateBitCast(Op,
374 VectorType::get(Type::getInt8Ty(C), NumElts),
375 "cast");
376 // We'll be shuffling in zeroes.
377 Value *Res = ConstantVector::getSplat(NumElts, Builder.getInt8(0));
378
379 // If shift is less than 16, emit a shuffle to move the bytes. Otherwise,
380 // we'll just return the zero vector.
381 if (Shift < 16) {
382 SmallVector<Constant*, 32> Idxs;
383 // 256-bit version is split into two 16-byte lanes.
384 for (unsigned l = 0; l != NumElts; l += 16)
385 for (unsigned i = 0; i != 16; ++i) {
386 unsigned Idx = NumElts + i - Shift;
387 if (Idx < NumElts)
388 Idx -= NumElts - 16; // end of lane, switch operand.
389 Idxs.push_back(Builder.getInt32(Idx + l));
390 }
391
392 Res = Builder.CreateShuffleVector(Res, Op, ConstantVector::get(Idxs));
393 }
394
395 // Bitcast back to a 64-bit element type.
396 return Builder.CreateBitCast(Res,
397 VectorType::get(Type::getInt64Ty(C), 2*NumLanes),
398 "cast");
399}
400
401// Handles upgrading SSE2 and AVX2 PSRLDQ intrinsics by converting them
402// to byte shuffles.
403static Value *UpgradeX86PSRLDQIntrinsics(IRBuilder<> &Builder, LLVMContext &C,
404 Value *Op, unsigned NumLanes,
405 unsigned Shift) {
406 // Each lane is 16 bytes.
407 unsigned NumElts = NumLanes * 16;
408
409 // Bitcast from a 64-bit element type to a byte element type.
410 Op = Builder.CreateBitCast(Op,
411 VectorType::get(Type::getInt8Ty(C), NumElts),
412 "cast");
413 // We'll be shuffling in zeroes.
414 Value *Res = ConstantVector::getSplat(NumElts, Builder.getInt8(0));
415
416 // If shift is less than 16, emit a shuffle to move the bytes. Otherwise,
417 // we'll just return the zero vector.
418 if (Shift < 16) {
419 SmallVector<Constant*, 32> Idxs;
420 // 256-bit version is split into two 16-byte lanes.
421 for (unsigned l = 0; l != NumElts; l += 16)
422 for (unsigned i = 0; i != 16; ++i) {
423 unsigned Idx = i + Shift;
424 if (Idx >= 16)
425 Idx += NumElts - 16; // end of lane, switch operand.
426 Idxs.push_back(Builder.getInt32(Idx + l));
427 }
428
429 Res = Builder.CreateShuffleVector(Op, Res, ConstantVector::get(Idxs));
430 }
431
432 // Bitcast back to a 64-bit element type.
433 return Builder.CreateBitCast(Res,
434 VectorType::get(Type::getInt64Ty(C), 2*NumLanes),
435 "cast");
436}
437
Nadav Rotem17ee58a2012-06-10 18:42:51 +0000438// UpgradeIntrinsicCall - Upgrade a call to an old intrinsic to be a call the
439// upgraded intrinsic. All argument and return casting must be provided in
Chandler Carruth7132e002007-08-04 01:51:18 +0000440// order to seamlessly integrate with existing context.
441void llvm::UpgradeIntrinsicCall(CallInst *CI, Function *NewFn) {
Craig Topper3b1817d2012-02-03 06:10:55 +0000442 Function *F = CI->getCalledFunction();
Nick Lewycky2eb3ade2011-12-12 22:59:34 +0000443 LLVMContext &C = CI->getContext();
Chandler Carruth58a71ed2011-12-12 04:26:04 +0000444 IRBuilder<> Builder(C);
445 Builder.SetInsertPoint(CI->getParent(), CI);
446
Craig Topper3b1817d2012-02-03 06:10:55 +0000447 assert(F && "Intrinsic call is not direct?");
448
449 if (!NewFn) {
450 // Get the Function's name.
451 StringRef Name = F->getName();
452
453 Value *Rep;
454 // Upgrade packed integer vector compares intrinsics to compare instructions
455 if (Name.startswith("llvm.x86.sse2.pcmpeq.") ||
456 Name.startswith("llvm.x86.avx2.pcmpeq.")) {
457 Rep = Builder.CreateICmpEQ(CI->getArgOperand(0), CI->getArgOperand(1),
458 "pcmpeq");
459 // need to sign extend since icmp returns vector of i1
460 Rep = Builder.CreateSExt(Rep, CI->getType(), "");
461 } else if (Name.startswith("llvm.x86.sse2.pcmpgt.") ||
462 Name.startswith("llvm.x86.avx2.pcmpgt.")) {
463 Rep = Builder.CreateICmpSGT(CI->getArgOperand(0), CI->getArgOperand(1),
464 "pcmpgt");
465 // need to sign extend since icmp returns vector of i1
466 Rep = Builder.CreateSExt(Rep, CI->getType(), "");
Craig Topper7daf8972012-05-08 06:58:15 +0000467 } else if (Name == "llvm.x86.avx.movnt.dq.256" ||
468 Name == "llvm.x86.avx.movnt.ps.256" ||
469 Name == "llvm.x86.avx.movnt.pd.256") {
470 IRBuilder<> Builder(C);
471 Builder.SetInsertPoint(CI->getParent(), CI);
472
473 Module *M = F->getParent();
Duncan P. N. Exon Smith5bf8fef2014-12-09 18:38:53 +0000474 SmallVector<Metadata *, 1> Elts;
475 Elts.push_back(
476 ConstantAsMetadata::get(ConstantInt::get(Type::getInt32Ty(C), 1)));
Craig Topper7daf8972012-05-08 06:58:15 +0000477 MDNode *Node = MDNode::get(C, Elts);
478
479 Value *Arg0 = CI->getArgOperand(0);
480 Value *Arg1 = CI->getArgOperand(1);
481
482 // Convert the type of the pointer to a pointer to the stored type.
483 Value *BC = Builder.CreateBitCast(Arg0,
484 PointerType::getUnqual(Arg1->getType()),
485 "cast");
486 StoreInst *SI = Builder.CreateStore(Arg1, BC);
487 SI->setMetadata(M->getMDKindID("nontemporal"), Node);
488 SI->setAlignment(16);
489
490 // Remove intrinsic.
491 CI->eraseFromParent();
492 return;
Craig Topper3352ba52012-06-09 16:46:13 +0000493 } else if (Name.startswith("llvm.x86.xop.vpcom")) {
494 Intrinsic::ID intID;
495 if (Name.endswith("ub"))
496 intID = Intrinsic::x86_xop_vpcomub;
497 else if (Name.endswith("uw"))
498 intID = Intrinsic::x86_xop_vpcomuw;
499 else if (Name.endswith("ud"))
500 intID = Intrinsic::x86_xop_vpcomud;
501 else if (Name.endswith("uq"))
502 intID = Intrinsic::x86_xop_vpcomuq;
503 else if (Name.endswith("b"))
504 intID = Intrinsic::x86_xop_vpcomb;
505 else if (Name.endswith("w"))
506 intID = Intrinsic::x86_xop_vpcomw;
507 else if (Name.endswith("d"))
508 intID = Intrinsic::x86_xop_vpcomd;
509 else if (Name.endswith("q"))
510 intID = Intrinsic::x86_xop_vpcomq;
511 else
512 llvm_unreachable("Unknown suffix");
513
514 Name = Name.substr(18); // strip off "llvm.x86.xop.vpcom"
515 unsigned Imm;
516 if (Name.startswith("lt"))
517 Imm = 0;
518 else if (Name.startswith("le"))
519 Imm = 1;
520 else if (Name.startswith("gt"))
521 Imm = 2;
522 else if (Name.startswith("ge"))
523 Imm = 3;
524 else if (Name.startswith("eq"))
525 Imm = 4;
526 else if (Name.startswith("ne"))
527 Imm = 5;
Craig Topper3352ba52012-06-09 16:46:13 +0000528 else if (Name.startswith("false"))
Craig Toppere32546d2015-02-13 07:42:15 +0000529 Imm = 6;
530 else if (Name.startswith("true"))
Craig Topper3352ba52012-06-09 16:46:13 +0000531 Imm = 7;
532 else
533 llvm_unreachable("Unknown condition");
534
535 Function *VPCOM = Intrinsic::getDeclaration(F->getParent(), intID);
536 Rep = Builder.CreateCall3(VPCOM, CI->getArgOperand(0),
537 CI->getArgOperand(1), Builder.getInt8(Imm));
Craig Topperef9e9932013-10-15 05:20:47 +0000538 } else if (Name == "llvm.x86.sse42.crc32.64.8") {
539 Function *CRC32 = Intrinsic::getDeclaration(F->getParent(),
540 Intrinsic::x86_sse42_crc32_32_8);
541 Value *Trunc0 = Builder.CreateTrunc(CI->getArgOperand(0), Type::getInt32Ty(C));
542 Rep = Builder.CreateCall2(CRC32, Trunc0, CI->getArgOperand(1));
543 Rep = Builder.CreateZExt(Rep, CI->getType(), "");
Adam Nemet39066802014-05-29 23:35:33 +0000544 } else if (Name.startswith("llvm.x86.avx.vbroadcast")) {
545 // Replace broadcasts with a series of insertelements.
546 Type *VecTy = CI->getType();
547 Type *EltTy = VecTy->getVectorElementType();
548 unsigned EltNum = VecTy->getVectorNumElements();
549 Value *Cast = Builder.CreateBitCast(CI->getArgOperand(0),
550 EltTy->getPointerTo());
551 Value *Load = Builder.CreateLoad(Cast);
552 Type *I32Ty = Type::getInt32Ty(C);
553 Rep = UndefValue::get(VecTy);
554 for (unsigned I = 0; I < EltNum; ++I)
555 Rep = Builder.CreateInsertElement(Rep, Load,
556 ConstantInt::get(I32Ty, I));
Juergen Ributzka1f7a1762015-03-04 00:13:25 +0000557 } else if (Name == "llvm.x86.avx2.vbroadcasti128") {
558 // Replace vbroadcasts with a vector shuffle.
559 Value *Op = Builder.CreatePointerCast(
560 CI->getArgOperand(0),
561 PointerType::getUnqual(VectorType::get(Type::getInt64Ty(C), 2)));
562 Value *Load = Builder.CreateLoad(Op);
563 SmallVector<Constant *, 4> Idxs; // 0, 1, 0, 1.
564 for (unsigned i = 0; i != 4; ++i)
565 Idxs.push_back(Builder.getInt32(i & 1));
566 Rep = Builder.CreateShuffleVector(Load, UndefValue::get(Load->getType()),
567 ConstantVector::get(Idxs));
Craig Topperb324e432015-02-18 06:24:44 +0000568 } else if (Name == "llvm.x86.sse2.psll.dq") {
569 // 128-bit shift left specified in bits.
570 unsigned Shift = cast<ConstantInt>(CI->getArgOperand(1))->getZExtValue();
571 Rep = UpgradeX86PSLLDQIntrinsics(Builder, C, CI->getArgOperand(0), 1,
572 Shift / 8); // Shift is in bits.
573 } else if (Name == "llvm.x86.sse2.psrl.dq") {
574 // 128-bit shift right specified in bits.
575 unsigned Shift = cast<ConstantInt>(CI->getArgOperand(1))->getZExtValue();
576 Rep = UpgradeX86PSRLDQIntrinsics(Builder, C, CI->getArgOperand(0), 1,
577 Shift / 8); // Shift is in bits.
578 } else if (Name == "llvm.x86.avx2.psll.dq") {
579 // 256-bit shift left specified in bits.
580 unsigned Shift = cast<ConstantInt>(CI->getArgOperand(1))->getZExtValue();
581 Rep = UpgradeX86PSLLDQIntrinsics(Builder, C, CI->getArgOperand(0), 2,
582 Shift / 8); // Shift is in bits.
583 } else if (Name == "llvm.x86.avx2.psrl.dq") {
584 // 256-bit shift right specified in bits.
585 unsigned Shift = cast<ConstantInt>(CI->getArgOperand(1))->getZExtValue();
586 Rep = UpgradeX86PSRLDQIntrinsics(Builder, C, CI->getArgOperand(0), 2,
587 Shift / 8); // Shift is in bits.
Craig Topper4e0700f2015-02-13 06:07:24 +0000588 } else if (Name == "llvm.x86.sse2.psll.dq.bs") {
Craig Topperb324e432015-02-18 06:24:44 +0000589 // 128-bit shift left specified in bytes.
Craig Topper4e0700f2015-02-13 06:07:24 +0000590 unsigned Shift = cast<ConstantInt>(CI->getArgOperand(1))->getZExtValue();
Craig Topperb324e432015-02-18 06:24:44 +0000591 Rep = UpgradeX86PSLLDQIntrinsics(Builder, C, CI->getArgOperand(0), 1,
592 Shift);
Craig Topper4e0700f2015-02-13 06:07:24 +0000593 } else if (Name == "llvm.x86.sse2.psrl.dq.bs") {
Craig Topperb324e432015-02-18 06:24:44 +0000594 // 128-bit shift right specified in bytes.
Craig Topper4e0700f2015-02-13 06:07:24 +0000595 unsigned Shift = cast<ConstantInt>(CI->getArgOperand(1))->getZExtValue();
Craig Topperb324e432015-02-18 06:24:44 +0000596 Rep = UpgradeX86PSRLDQIntrinsics(Builder, C, CI->getArgOperand(0), 1,
597 Shift);
Craig Topper44026ef2015-02-16 20:51:59 +0000598 } else if (Name == "llvm.x86.avx2.psll.dq.bs") {
Craig Topperb324e432015-02-18 06:24:44 +0000599 // 256-bit shift left specified in bytes.
Craig Topper44026ef2015-02-16 20:51:59 +0000600 unsigned Shift = cast<ConstantInt>(CI->getArgOperand(1))->getZExtValue();
Craig Topperb324e432015-02-18 06:24:44 +0000601 Rep = UpgradeX86PSLLDQIntrinsics(Builder, C, CI->getArgOperand(0), 2,
602 Shift);
Craig Topper44026ef2015-02-16 20:51:59 +0000603 } else if (Name == "llvm.x86.avx2.psrl.dq.bs") {
Craig Topperb324e432015-02-18 06:24:44 +0000604 // 256-bit shift right specified in bytes.
Craig Topper44026ef2015-02-16 20:51:59 +0000605 unsigned Shift = cast<ConstantInt>(CI->getArgOperand(1))->getZExtValue();
Craig Topperb324e432015-02-18 06:24:44 +0000606 Rep = UpgradeX86PSRLDQIntrinsics(Builder, C, CI->getArgOperand(0), 2,
607 Shift);
Craig Topper782d6202015-02-28 19:33:17 +0000608 } else if (Name == "llvm.x86.sse41.pblendw" ||
609 Name == "llvm.x86.sse41.blendpd" ||
610 Name == "llvm.x86.sse41.blendps" ||
611 Name == "llvm.x86.avx.blend.pd.256" ||
612 Name == "llvm.x86.avx.blend.ps.256" ||
613 Name == "llvm.x86.avx2.pblendw" ||
614 Name == "llvm.x86.avx2.pblendd.128" ||
615 Name == "llvm.x86.avx2.pblendd.256") {
616 Value *Op0 = CI->getArgOperand(0);
617 Value *Op1 = CI->getArgOperand(1);
618 unsigned Imm = cast <ConstantInt>(CI->getArgOperand(2))->getZExtValue();
619 VectorType *VecTy = cast<VectorType>(CI->getType());
620 unsigned NumElts = VecTy->getNumElements();
621
622 SmallVector<Constant*, 16> Idxs;
623 for (unsigned i = 0; i != NumElts; ++i) {
624 unsigned Idx = ((Imm >> (i%8)) & 1) ? i + NumElts : i;
625 Idxs.push_back(Builder.getInt32(Idx));
626 }
627
628 Rep = Builder.CreateShuffleVector(Op0, Op1, ConstantVector::get(Idxs));
Craig Topper3b1817d2012-02-03 06:10:55 +0000629 } else {
Craig Topperd3c9e402012-04-18 05:24:00 +0000630 bool PD128 = false, PD256 = false, PS128 = false, PS256 = false;
Craig Topper7daf8972012-05-08 06:58:15 +0000631 if (Name == "llvm.x86.avx.vpermil.pd.256")
Craig Topperd3c9e402012-04-18 05:24:00 +0000632 PD256 = true;
Craig Topper7daf8972012-05-08 06:58:15 +0000633 else if (Name == "llvm.x86.avx.vpermil.pd")
Craig Topperd3c9e402012-04-18 05:24:00 +0000634 PD128 = true;
Craig Topper7daf8972012-05-08 06:58:15 +0000635 else if (Name == "llvm.x86.avx.vpermil.ps.256")
Craig Topperd3c9e402012-04-18 05:24:00 +0000636 PS256 = true;
Craig Topper7daf8972012-05-08 06:58:15 +0000637 else if (Name == "llvm.x86.avx.vpermil.ps")
Craig Topperd3c9e402012-04-18 05:24:00 +0000638 PS128 = true;
639
640 if (PD256 || PD128 || PS256 || PS128) {
641 Value *Op0 = CI->getArgOperand(0);
642 unsigned Imm = cast<ConstantInt>(CI->getArgOperand(1))->getZExtValue();
643 SmallVector<Constant*, 8> Idxs;
644
645 if (PD128)
646 for (unsigned i = 0; i != 2; ++i)
647 Idxs.push_back(Builder.getInt32((Imm >> i) & 0x1));
648 else if (PD256)
649 for (unsigned l = 0; l != 4; l+=2)
650 for (unsigned i = 0; i != 2; ++i)
651 Idxs.push_back(Builder.getInt32(((Imm >> (l+i)) & 0x1) + l));
652 else if (PS128)
653 for (unsigned i = 0; i != 4; ++i)
654 Idxs.push_back(Builder.getInt32((Imm >> (2 * i)) & 0x3));
655 else if (PS256)
656 for (unsigned l = 0; l != 8; l+=4)
657 for (unsigned i = 0; i != 4; ++i)
658 Idxs.push_back(Builder.getInt32(((Imm >> (2 * i)) & 0x3) + l));
659 else
660 llvm_unreachable("Unexpected function");
661
662 Rep = Builder.CreateShuffleVector(Op0, Op0, ConstantVector::get(Idxs));
663 } else {
664 llvm_unreachable("Unknown function for CallInst upgrade.");
665 }
Craig Topper3b1817d2012-02-03 06:10:55 +0000666 }
667
668 CI->replaceAllUsesWith(Rep);
669 CI->eraseFromParent();
670 return;
671 }
672
Chandler Carruth1f41bf02012-07-20 21:09:18 +0000673 std::string Name = CI->getName().str();
Adrian Prantl87b7eb92014-10-01 18:55:02 +0000674 if (!Name.empty())
675 CI->setName(Name + ".old");
Nadav Rotem17ee58a2012-06-10 18:42:51 +0000676
Chandler Carruth58a71ed2011-12-12 04:26:04 +0000677 switch (NewFn->getIntrinsicID()) {
678 default:
Chris Lattner0bcbde42011-11-27 08:42:07 +0000679 llvm_unreachable("Unknown function for CallInst upgrade.");
Chandler Carruth58a71ed2011-12-12 04:26:04 +0000680
Adrian Prantl87b7eb92014-10-01 18:55:02 +0000681 // Upgrade debug intrinsics to use an additional DIExpression argument.
682 case Intrinsic::dbg_declare: {
683 auto NewCI =
684 Builder.CreateCall3(NewFn, CI->getArgOperand(0), CI->getArgOperand(1),
685 getExpression(CI->getArgOperand(1), F), Name);
686 NewCI->setDebugLoc(CI->getDebugLoc());
687 CI->replaceAllUsesWith(NewCI);
688 CI->eraseFromParent();
689 return;
690 }
691 case Intrinsic::dbg_value: {
692 auto NewCI = Builder.CreateCall4(
693 NewFn, CI->getArgOperand(0), CI->getArgOperand(1), CI->getArgOperand(2),
694 getExpression(CI->getArgOperand(2), F), Name);
695 NewCI->setDebugLoc(CI->getDebugLoc());
696 CI->replaceAllUsesWith(NewCI);
697 CI->eraseFromParent();
698 return;
699 }
Chandler Carruth58a71ed2011-12-12 04:26:04 +0000700 case Intrinsic::ctlz:
Nuno Lopesad40c0a2012-05-22 15:25:31 +0000701 case Intrinsic::cttz:
Chandler Carruth58a71ed2011-12-12 04:26:04 +0000702 assert(CI->getNumArgOperands() == 1 &&
703 "Mismatch between function args and call args");
Chandler Carruth58a71ed2011-12-12 04:26:04 +0000704 CI->replaceAllUsesWith(Builder.CreateCall2(NewFn, CI->getArgOperand(0),
705 Builder.getFalse(), Name));
706 CI->eraseFromParent();
707 return;
Nadav Rotem17ee58a2012-06-10 18:42:51 +0000708
Matt Arsenaultfbcbce42013-10-07 18:06:48 +0000709 case Intrinsic::objectsize:
710 CI->replaceAllUsesWith(Builder.CreateCall2(NewFn,
711 CI->getArgOperand(0),
712 CI->getArgOperand(1),
713 Name));
714 CI->eraseFromParent();
715 return;
716
Joel Jonesb84f7be2012-07-18 00:02:16 +0000717 case Intrinsic::ctpop: {
718 CI->replaceAllUsesWith(Builder.CreateCall(NewFn, CI->getArgOperand(0)));
719 CI->eraseFromParent();
720 return;
721 }
Joel Jones43cb8782012-07-13 23:25:25 +0000722
Craig Topper71dc02d2012-06-13 07:18:53 +0000723 case Intrinsic::x86_xop_vfrcz_ss:
724 case Intrinsic::x86_xop_vfrcz_sd:
725 CI->replaceAllUsesWith(Builder.CreateCall(NewFn, CI->getArgOperand(1),
726 Name));
727 CI->eraseFromParent();
728 return;
729
Nadav Rotem17ee58a2012-06-10 18:42:51 +0000730 case Intrinsic::x86_sse41_ptestc:
731 case Intrinsic::x86_sse41_ptestz:
Craig Topper71dc02d2012-06-13 07:18:53 +0000732 case Intrinsic::x86_sse41_ptestnzc: {
Nadav Rotem17ee58a2012-06-10 18:42:51 +0000733 // The arguments for these intrinsics used to be v4f32, and changed
734 // to v2i64. This is purely a nop, since those are bitwise intrinsics.
735 // So, the only thing required is a bitcast for both arguments.
736 // First, check the arguments have the old type.
737 Value *Arg0 = CI->getArgOperand(0);
738 if (Arg0->getType() != VectorType::get(Type::getFloatTy(C), 4))
739 return;
740
741 // Old intrinsic, add bitcasts
742 Value *Arg1 = CI->getArgOperand(1);
743
744 Value *BC0 =
745 Builder.CreateBitCast(Arg0,
746 VectorType::get(Type::getInt64Ty(C), 2),
747 "cast");
748 Value *BC1 =
749 Builder.CreateBitCast(Arg1,
750 VectorType::get(Type::getInt64Ty(C), 2),
751 "cast");
752
753 CallInst* NewCall = Builder.CreateCall2(NewFn, BC0, BC1, Name);
754 CI->replaceAllUsesWith(NewCall);
755 CI->eraseFromParent();
756 return;
Evan Cheng0e179d02007-12-17 22:33:23 +0000757 }
Chandler Carruth373b2b12014-09-06 10:00:01 +0000758
Chandler Carruth373b2b12014-09-06 10:00:01 +0000759 case Intrinsic::x86_sse41_insertps:
760 case Intrinsic::x86_sse41_dppd:
761 case Intrinsic::x86_sse41_dpps:
762 case Intrinsic::x86_sse41_mpsadbw:
Chandler Carruth373b2b12014-09-06 10:00:01 +0000763 case Intrinsic::x86_avx_dp_ps_256:
Chandler Carruth373b2b12014-09-06 10:00:01 +0000764 case Intrinsic::x86_avx2_mpsadbw: {
765 // Need to truncate the last argument from i32 to i8 -- this argument models
766 // an inherently 8-bit immediate operand to these x86 instructions.
767 SmallVector<Value *, 4> Args(CI->arg_operands().begin(),
768 CI->arg_operands().end());
769
770 // Replace the last argument with a trunc.
771 Args.back() = Builder.CreateTrunc(Args.back(), Type::getInt8Ty(C), "trunc");
772
773 CallInst *NewCall = Builder.CreateCall(NewFn, Args);
774 CI->replaceAllUsesWith(NewCall);
775 CI->eraseFromParent();
776 return;
777 }
Craig Topperf4bf9112015-01-19 06:07:27 +0000778 case Intrinsic::x86_avx512_mask_cmp_ps_512:
779 case Intrinsic::x86_avx512_mask_cmp_pd_512: {
780 // Need to truncate the last argument from i32 to i8 -- this argument models
781 // an inherently 8-bit immediate operand to these x86 instructions.
782 SmallVector<Value *, 5> Args(CI->arg_operands().begin(),
783 CI->arg_operands().end());
784
785 // Replace the last argument with a trunc.
786 Args[2] = Builder.CreateTrunc(Args[2], Type::getInt8Ty(C), "trunc");
787
788 CallInst *NewCall = Builder.CreateCall(NewFn, Args);
789 CI->replaceAllUsesWith(NewCall);
790 CI->eraseFromParent();
791 return;
792 }
Craig Topper71dc02d2012-06-13 07:18:53 +0000793 }
Chandler Carruth7132e002007-08-04 01:51:18 +0000794}
795
Matt Arsenaultc4c92262013-07-20 17:46:00 +0000796// This tests each Function to determine if it needs upgrading. When we find
797// one we are interested in, we then upgrade all calls to reflect the new
Chandler Carruth7132e002007-08-04 01:51:18 +0000798// function.
799void llvm::UpgradeCallsToIntrinsic(Function* F) {
800 assert(F && "Illegal attempt to upgrade a non-existent intrinsic.");
801
802 // Upgrade the function and check if it is a totaly new function.
Chris Lattner80ed9dc2011-06-18 06:05:24 +0000803 Function *NewFn;
Evan Cheng0e179d02007-12-17 22:33:23 +0000804 if (UpgradeIntrinsicFunction(F, NewFn)) {
Chandler Carruth7132e002007-08-04 01:51:18 +0000805 if (NewFn != F) {
806 // Replace all uses to the old function with the new one if necessary.
Chandler Carruthcdf47882014-03-09 03:16:01 +0000807 for (Value::user_iterator UI = F->user_begin(), UE = F->user_end();
Chandler Carruth7132e002007-08-04 01:51:18 +0000808 UI != UE; ) {
Chris Lattner80ed9dc2011-06-18 06:05:24 +0000809 if (CallInst *CI = dyn_cast<CallInst>(*UI++))
Chandler Carruth7132e002007-08-04 01:51:18 +0000810 UpgradeIntrinsicCall(CI, NewFn);
811 }
812 // Remove old function, no longer used, from the module.
813 F->eraseFromParent();
814 }
815 }
816}
Devang Patel80ae3492009-08-28 23:24:31 +0000817
Manman Ren209b17c2013-09-28 00:22:27 +0000818void llvm::UpgradeInstWithTBAATag(Instruction *I) {
Duncan P. N. Exon Smithde36e802014-11-11 21:30:22 +0000819 MDNode *MD = I->getMetadata(LLVMContext::MD_tbaa);
Manman Ren209b17c2013-09-28 00:22:27 +0000820 assert(MD && "UpgradeInstWithTBAATag should have a TBAA tag");
821 // Check if the tag uses struct-path aware TBAA format.
822 if (isa<MDNode>(MD->getOperand(0)) && MD->getNumOperands() >= 3)
823 return;
824
825 if (MD->getNumOperands() == 3) {
Duncan P. N. Exon Smith5bf8fef2014-12-09 18:38:53 +0000826 Metadata *Elts[] = {MD->getOperand(0), MD->getOperand(1)};
Manman Ren209b17c2013-09-28 00:22:27 +0000827 MDNode *ScalarType = MDNode::get(I->getContext(), Elts);
828 // Create a MDNode <ScalarType, ScalarType, offset 0, const>
Duncan P. N. Exon Smith5bf8fef2014-12-09 18:38:53 +0000829 Metadata *Elts2[] = {ScalarType, ScalarType,
830 ConstantAsMetadata::get(Constant::getNullValue(
831 Type::getInt64Ty(I->getContext()))),
832 MD->getOperand(2)};
Manman Ren209b17c2013-09-28 00:22:27 +0000833 I->setMetadata(LLVMContext::MD_tbaa, MDNode::get(I->getContext(), Elts2));
834 } else {
835 // Create a MDNode <MD, MD, offset 0>
Duncan P. N. Exon Smith5bf8fef2014-12-09 18:38:53 +0000836 Metadata *Elts[] = {MD, MD, ConstantAsMetadata::get(Constant::getNullValue(
837 Type::getInt64Ty(I->getContext())))};
Manman Ren209b17c2013-09-28 00:22:27 +0000838 I->setMetadata(LLVMContext::MD_tbaa, MDNode::get(I->getContext(), Elts));
839 }
840}
Matt Arsenaultb03bd4d2013-11-15 01:34:59 +0000841
842Instruction *llvm::UpgradeBitCastInst(unsigned Opc, Value *V, Type *DestTy,
843 Instruction *&Temp) {
844 if (Opc != Instruction::BitCast)
Craig Topperc6207612014-04-09 06:08:46 +0000845 return nullptr;
Matt Arsenaultb03bd4d2013-11-15 01:34:59 +0000846
Craig Topperc6207612014-04-09 06:08:46 +0000847 Temp = nullptr;
Matt Arsenaultb03bd4d2013-11-15 01:34:59 +0000848 Type *SrcTy = V->getType();
849 if (SrcTy->isPtrOrPtrVectorTy() && DestTy->isPtrOrPtrVectorTy() &&
850 SrcTy->getPointerAddressSpace() != DestTy->getPointerAddressSpace()) {
851 LLVMContext &Context = V->getContext();
852
853 // We have no information about target data layout, so we assume that
854 // the maximum pointer size is 64bit.
855 Type *MidTy = Type::getInt64Ty(Context);
856 Temp = CastInst::Create(Instruction::PtrToInt, V, MidTy);
857
858 return CastInst::Create(Instruction::IntToPtr, Temp, DestTy);
859 }
860
Craig Topperc6207612014-04-09 06:08:46 +0000861 return nullptr;
Matt Arsenaultb03bd4d2013-11-15 01:34:59 +0000862}
863
864Value *llvm::UpgradeBitCastExpr(unsigned Opc, Constant *C, Type *DestTy) {
865 if (Opc != Instruction::BitCast)
Craig Topperc6207612014-04-09 06:08:46 +0000866 return nullptr;
Matt Arsenaultb03bd4d2013-11-15 01:34:59 +0000867
868 Type *SrcTy = C->getType();
869 if (SrcTy->isPtrOrPtrVectorTy() && DestTy->isPtrOrPtrVectorTy() &&
870 SrcTy->getPointerAddressSpace() != DestTy->getPointerAddressSpace()) {
871 LLVMContext &Context = C->getContext();
872
873 // We have no information about target data layout, so we assume that
874 // the maximum pointer size is 64bit.
875 Type *MidTy = Type::getInt64Ty(Context);
876
877 return ConstantExpr::getIntToPtr(ConstantExpr::getPtrToInt(C, MidTy),
878 DestTy);
879 }
880
Craig Topperc6207612014-04-09 06:08:46 +0000881 return nullptr;
Matt Arsenaultb03bd4d2013-11-15 01:34:59 +0000882}
Manman Ren8b4306c2013-12-02 21:29:56 +0000883
884/// Check the debug info version number, if it is out-dated, drop the debug
885/// info. Return true if module is modified.
886bool llvm::UpgradeDebugInfo(Module &M) {
Manman Ren2ebfb422014-01-16 01:51:12 +0000887 unsigned Version = getDebugMetadataVersionFromModule(M);
888 if (Version == DEBUG_METADATA_VERSION)
Manman Ren8b4306c2013-12-02 21:29:56 +0000889 return false;
890
Manman Ren2ebfb422014-01-16 01:51:12 +0000891 bool RetCode = StripDebugInfo(M);
892 if (RetCode) {
893 DiagnosticInfoDebugMetadataVersion DiagVersion(M, Version);
894 M.getContext().diagnose(DiagVersion);
895 }
896 return RetCode;
Manman Ren8b4306c2013-12-02 21:29:56 +0000897}
Eli Bendersky5d5e18d2014-06-25 15:41:00 +0000898
899void llvm::UpgradeMDStringConstant(std::string &String) {
900 const std::string OldPrefix = "llvm.vectorizer.";
Mark Heffernan9d20e422014-07-21 23:11:03 +0000901 if (String == "llvm.vectorizer.unroll") {
902 String = "llvm.loop.interleave.count";
903 } else if (String.find(OldPrefix) == 0) {
904 String.replace(0, OldPrefix.size(), "llvm.loop.vectorize.");
Eli Bendersky5d5e18d2014-06-25 15:41:00 +0000905 }
906}