Bug Summary

File:llvm/lib/Transforms/ObjCARC/ObjCARCContract.cpp
Warning:line 409, column 7
Called C++ object pointer is null

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name ObjCARCContract.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -fhalf-no-semantic-interposition -mframe-pointer=none -fmath-errno -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -tune-cpu generic -fno-split-dwarf-inlining -debugger-tuning=gdb -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-12/lib/clang/12.0.0 -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/build-llvm/lib/Transforms/ObjCARC -I /build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/lib/Transforms/ObjCARC -I /build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/build-llvm/include -I /build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/backward -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-12/lib/clang/12.0.0/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/build-llvm/lib/Transforms/ObjCARC -fdebug-prefix-map=/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5=. -ferror-limit 19 -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -o /tmp/scan-build-2021-01-16-002530-32805-1 -x c++ /build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/lib/Transforms/ObjCARC/ObjCARCContract.cpp

/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/lib/Transforms/ObjCARC/ObjCARCContract.cpp

1//===- ObjCARCContract.cpp - ObjC ARC Optimization ------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8/// \file
9/// This file defines late ObjC ARC optimizations. ARC stands for Automatic
10/// Reference Counting and is a system for managing reference counts for objects
11/// in Objective C.
12///
13/// This specific file mainly deals with ``contracting'' multiple lower level
14/// operations into singular higher level operations through pattern matching.
15///
16/// WARNING: This file knows about certain library functions. It recognizes them
17/// by name, and hardwires knowledge of their semantics.
18///
19/// WARNING: This file knows about how certain Objective-C library functions are
20/// used. Naive LLVM IR transformations which would otherwise be
21/// behavior-preserving may break these assumptions.
22///
23//===----------------------------------------------------------------------===//
24
25// TODO: ObjCARCContract could insert PHI nodes when uses aren't
26// dominated by single calls.
27
28#include "ARCRuntimeEntryPoints.h"
29#include "DependencyAnalysis.h"
30#include "ObjCARC.h"
31#include "ProvenanceAnalysis.h"
32#include "llvm/ADT/Statistic.h"
33#include "llvm/Analysis/AliasAnalysis.h"
34#include "llvm/Analysis/EHPersonalities.h"
35#include "llvm/IR/Dominators.h"
36#include "llvm/IR/InlineAsm.h"
37#include "llvm/IR/InstIterator.h"
38#include "llvm/IR/Operator.h"
39#include "llvm/IR/PassManager.h"
40#include "llvm/InitializePasses.h"
41#include "llvm/Support/CommandLine.h"
42#include "llvm/Support/Debug.h"
43#include "llvm/Support/raw_ostream.h"
44#include "llvm/Transforms/ObjCARC.h"
45
46using namespace llvm;
47using namespace llvm::objcarc;
48
49#define DEBUG_TYPE"objc-arc-contract" "objc-arc-contract"
50
51STATISTIC(NumPeeps, "Number of calls peephole-optimized")static llvm::Statistic NumPeeps = {"objc-arc-contract", "NumPeeps"
, "Number of calls peephole-optimized"}
;
52STATISTIC(NumStoreStrongs, "Number objc_storeStrong calls formed")static llvm::Statistic NumStoreStrongs = {"objc-arc-contract"
, "NumStoreStrongs", "Number objc_storeStrong calls formed"}
;
53
54//===----------------------------------------------------------------------===//
55// Declarations
56//===----------------------------------------------------------------------===//
57
58namespace {
59/// Late ARC optimizations
60///
61/// These change the IR in a way that makes it difficult to be analyzed by
62/// ObjCARCOpt, so it's run late.
63
64class ObjCARCContract {
65 bool Changed;
66 AAResults *AA;
67 DominatorTree *DT;
68 ProvenanceAnalysis PA;
69 ARCRuntimeEntryPoints EP;
70
71 /// A flag indicating whether this optimization pass should run.
72 bool Run;
73
74 /// The inline asm string to insert between calls and RetainRV calls to make
75 /// the optimization work on targets which need it.
76 const MDString *RVInstMarker;
77
78 /// The set of inserted objc_storeStrong calls. If at the end of walking the
79 /// function we have found no alloca instructions, these calls can be marked
80 /// "tail".
81 SmallPtrSet<CallInst *, 8> StoreStrongCalls;
82
83 /// Returns true if we eliminated Inst.
84 bool tryToPeepholeInstruction(
85 Function &F, Instruction *Inst, inst_iterator &Iter,
86 bool &TailOkForStoreStrong,
87 const DenseMap<BasicBlock *, ColorVector> &BlockColors);
88
89 bool optimizeRetainCall(Function &F, Instruction *Retain);
90
91 bool contractAutorelease(Function &F, Instruction *Autorelease,
92 ARCInstKind Class);
93
94 void tryToContractReleaseIntoStoreStrong(
95 Instruction *Release, inst_iterator &Iter,
96 const DenseMap<BasicBlock *, ColorVector> &BlockColors);
97
98public:
99 bool init(Module &M);
100 bool run(Function &F, AAResults *AA, DominatorTree *DT);
101};
102
103class ObjCARCContractLegacyPass : public FunctionPass {
104 ObjCARCContract OCARCC;
105
106public:
107 void getAnalysisUsage(AnalysisUsage &AU) const override;
108 bool doInitialization(Module &M) override;
109 bool runOnFunction(Function &F) override;
110
111 static char ID;
112 ObjCARCContractLegacyPass() : FunctionPass(ID) {
113 initializeObjCARCContractLegacyPassPass(*PassRegistry::getPassRegistry());
114 }
115};
116}
117
118//===----------------------------------------------------------------------===//
119// Implementation
120//===----------------------------------------------------------------------===//
121
122/// Turn objc_retain into objc_retainAutoreleasedReturnValue if the operand is a
123/// return value. We do this late so we do not disrupt the dataflow analysis in
124/// ObjCARCOpt.
125bool ObjCARCContract::optimizeRetainCall(Function &F, Instruction *Retain) {
126 const auto *Call = dyn_cast<CallBase>(GetArgRCIdentityRoot(Retain));
127 if (!Call)
128 return false;
129 if (Call->getParent() != Retain->getParent())
130 return false;
131
132 // Check that the call is next to the retain.
133 BasicBlock::const_iterator I = ++Call->getIterator();
134 while (IsNoopInstruction(&*I))
135 ++I;
136 if (&*I != Retain)
137 return false;
138
139 // Turn it to an objc_retainAutoreleasedReturnValue.
140 Changed = true;
141 ++NumPeeps;
142
143 LLVM_DEBUG(do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("objc-arc-contract")) { dbgs() << "Transforming objc_retain => "
"objc_retainAutoreleasedReturnValue since the operand is a "
"return value.\nOld: " << *Retain << "\n"; } } while
(false)
144 dbgs() << "Transforming objc_retain => "do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("objc-arc-contract")) { dbgs() << "Transforming objc_retain => "
"objc_retainAutoreleasedReturnValue since the operand is a "
"return value.\nOld: " << *Retain << "\n"; } } while
(false)
145 "objc_retainAutoreleasedReturnValue since the operand is a "do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("objc-arc-contract")) { dbgs() << "Transforming objc_retain => "
"objc_retainAutoreleasedReturnValue since the operand is a "
"return value.\nOld: " << *Retain << "\n"; } } while
(false)
146 "return value.\nOld: "do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("objc-arc-contract")) { dbgs() << "Transforming objc_retain => "
"objc_retainAutoreleasedReturnValue since the operand is a "
"return value.\nOld: " << *Retain << "\n"; } } while
(false)
147 << *Retain << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("objc-arc-contract")) { dbgs() << "Transforming objc_retain => "
"objc_retainAutoreleasedReturnValue since the operand is a "
"return value.\nOld: " << *Retain << "\n"; } } while
(false)
;
148
149 // We do not have to worry about tail calls/does not throw since
150 // retain/retainRV have the same properties.
151 Function *Decl = EP.get(ARCRuntimeEntryPointKind::RetainRV);
152 cast<CallInst>(Retain)->setCalledFunction(Decl);
153
154 LLVM_DEBUG(dbgs() << "New: " << *Retain << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("objc-arc-contract")) { dbgs() << "New: " << *Retain
<< "\n"; } } while (false)
;
155 return true;
156}
157
158/// Merge an autorelease with a retain into a fused call.
159bool ObjCARCContract::contractAutorelease(Function &F, Instruction *Autorelease,
160 ARCInstKind Class) {
161 const Value *Arg = GetArgRCIdentityRoot(Autorelease);
162
163 // Check that there are no instructions between the retain and the autorelease
164 // (such as an autorelease_pop) which may change the count.
165 DependenceKind DK = Class == ARCInstKind::AutoreleaseRV
166 ? RetainAutoreleaseRVDep
167 : RetainAutoreleaseDep;
168 auto *Retain = dyn_cast_or_null<CallInst>(
169 findSingleDependency(DK, Arg, Autorelease->getParent(), Autorelease, PA));
170
171 if (!Retain || GetBasicARCInstKind(Retain) != ARCInstKind::Retain ||
172 GetArgRCIdentityRoot(Retain) != Arg)
173 return false;
174
175 Changed = true;
176 ++NumPeeps;
177
178 LLVM_DEBUG(dbgs() << " Fusing retain/autorelease!\n"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("objc-arc-contract")) { dbgs() << " Fusing retain/autorelease!\n"
" Autorelease:" << *Autorelease << "\n" " Retain: "
<< *Retain << "\n"; } } while (false)
179 " Autorelease:"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("objc-arc-contract")) { dbgs() << " Fusing retain/autorelease!\n"
" Autorelease:" << *Autorelease << "\n" " Retain: "
<< *Retain << "\n"; } } while (false)
180 << *Autoreleasedo { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("objc-arc-contract")) { dbgs() << " Fusing retain/autorelease!\n"
" Autorelease:" << *Autorelease << "\n" " Retain: "
<< *Retain << "\n"; } } while (false)
181 << "\n"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("objc-arc-contract")) { dbgs() << " Fusing retain/autorelease!\n"
" Autorelease:" << *Autorelease << "\n" " Retain: "
<< *Retain << "\n"; } } while (false)
182 " Retain: "do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("objc-arc-contract")) { dbgs() << " Fusing retain/autorelease!\n"
" Autorelease:" << *Autorelease << "\n" " Retain: "
<< *Retain << "\n"; } } while (false)
183 << *Retain << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("objc-arc-contract")) { dbgs() << " Fusing retain/autorelease!\n"
" Autorelease:" << *Autorelease << "\n" " Retain: "
<< *Retain << "\n"; } } while (false)
;
184
185 Function *Decl = EP.get(Class == ARCInstKind::AutoreleaseRV
186 ? ARCRuntimeEntryPointKind::RetainAutoreleaseRV
187 : ARCRuntimeEntryPointKind::RetainAutorelease);
188 Retain->setCalledFunction(Decl);
189
190 LLVM_DEBUG(dbgs() << " New RetainAutorelease: " << *Retain << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("objc-arc-contract")) { dbgs() << " New RetainAutorelease: "
<< *Retain << "\n"; } } while (false)
;
191
192 EraseInstruction(Autorelease);
193 return true;
194}
195
196static StoreInst *findSafeStoreForStoreStrongContraction(LoadInst *Load,
197 Instruction *Release,
198 ProvenanceAnalysis &PA,
199 AAResults *AA) {
200 StoreInst *Store = nullptr;
201 bool SawRelease = false;
202
203 // Get the location associated with Load.
204 MemoryLocation Loc = MemoryLocation::get(Load);
205 auto *LocPtr = Loc.Ptr->stripPointerCasts();
206
207 // Walk down to find the store and the release, which may be in either order.
208 for (auto I = std::next(BasicBlock::iterator(Load)),
29
Loop condition is true. Entering loop body
47
Loop condition is true. Entering loop body
56
Loop condition is false. Execution continues on line 275
209 E = Load->getParent()->end();
210 I != E; ++I) {
25
Calling 'operator!='
28
Returning from 'operator!='
43
Calling 'operator!='
46
Returning from 'operator!='
52
Calling 'operator!='
55
Returning from 'operator!='
211 // If we found the store we were looking for and saw the release,
212 // break. There is no more work to be done.
213 if (Store
29.1
'Store' is null
47.1
'Store' is non-null, which participates in a condition later
29.1
'Store' is null
47.1
'Store' is non-null, which participates in a condition later
29.1
'Store' is null
47.1
'Store' is non-null, which participates in a condition later
&& SawRelease
47.2
'SawRelease' is false
47.2
'SawRelease' is false
47.2
'SawRelease' is false
)
48
Taking false branch
214 break;
215
216 // Now we know that we have not seen either the store or the release. If I
217 // is the release, mark that we saw the release and continue.
218 Instruction *Inst = &*I;
219 if (Inst == Release) {
30
Assuming 'Inst' is not equal to 'Release', which participates in a condition later
31
Taking false branch
49
Assuming 'Inst' is equal to 'Release'
50
Taking true branch
220 SawRelease = true;
221 continue;
51
Execution continues on line 210
222 }
223
224 // Otherwise, we check if Inst is a "good" store. Grab the instruction class
225 // of Inst.
226 ARCInstKind Class = GetBasicARCInstKind(Inst);
227
228 // If Inst is an unrelated retain, we don't care about it.
229 //
230 // TODO: This is one area where the optimization could be made more
231 // aggressive.
232 if (IsRetain(Class))
32
Assuming the condition is false
33
Taking false branch
233 continue;
234
235 // If we have seen the store, but not the release...
236 if (Store
33.1
'Store' is null
33.1
'Store' is null
33.1
'Store' is null
) {
34
Taking false branch
237 // We need to make sure that it is safe to move the release from its
238 // current position to the store. This implies proving that any
239 // instruction in between Store and the Release conservatively can not use
240 // the RCIdentityRoot of Release. If we can prove we can ignore Inst, so
241 // continue...
242 if (!CanUse(Inst, Load, PA, Class)) {
243 continue;
244 }
245
246 // Otherwise, be conservative and return nullptr.
247 return nullptr;
248 }
249
250 // Ok, now we know we have not seen a store yet. See if Inst can write to
251 // our load location, if it can not, just ignore the instruction.
252 if (!isModSet(AA->getModRefInfo(Inst, Loc)))
35
Assuming the condition is false
36
Taking false branch
253 continue;
254
255 Store = dyn_cast<StoreInst>(Inst);
37
Assuming 'Inst' is a 'StoreInst'
256
257 // If Inst can, then check if Inst is a simple store. If Inst is not a
258 // store or a store that is not simple, then we have some we do not
259 // understand writing to this memory implying we can not move the load
260 // over the write to any subsequent store that we may find.
261 if (!Store
37.1
'Store' is non-null, which participates in a condition later
37.1
'Store' is non-null, which participates in a condition later
37.1
'Store' is non-null, which participates in a condition later
|| !Store->isSimple())
38
Assuming the condition is false
39
Taking false branch
262 return nullptr;
263
264 // Then make sure that the pointer we are storing to is Ptr. If so, we
265 // found our Store!
266 if (Store->getPointerOperand()->stripPointerCasts() == LocPtr)
40
Assuming the condition is true
41
Taking true branch
267 continue;
42
Execution continues on line 210
268
269 // Otherwise, we have an unknown store to some other ptr that clobbers
270 // Loc.Ptr. Bail!
271 return nullptr;
272 }
273
274 // If we did not find the store or did not see the release, fail.
275 if (!Store
56.1
'Store' is non-null, which participates in a condition later
56.1
'Store' is non-null, which participates in a condition later
56.1
'Store' is non-null, which participates in a condition later
|| !SawRelease
56.2
'SawRelease' is true
56.2
'SawRelease' is true
56.2
'SawRelease' is true
)
57
Taking false branch
276 return nullptr;
277
278 // We succeeded!
279 return Store;
58
Returning pointer (loaded from 'Store'), which participates in a condition later
280}
281
282static Instruction *
283findRetainForStoreStrongContraction(Value *New, StoreInst *Store,
284 Instruction *Release,
285 ProvenanceAnalysis &PA) {
286 // Walk up from the Store to find the retain.
287 BasicBlock::iterator I = Store->getIterator();
288 BasicBlock::iterator Begin = Store->getParent()->begin();
289 while (I != Begin && GetBasicARCInstKind(&*I) != ARCInstKind::Retain) {
62
Calling 'operator!='
65
Returning from 'operator!='
290 Instruction *Inst = &*I;
291
292 // It is only safe to move the retain to the store if we can prove
293 // conservatively that nothing besides the release can decrement reference
294 // counts in between the retain and the store.
295 if (CanDecrementRefCount(Inst, New, PA) && Inst != Release)
296 return nullptr;
297 --I;
298 }
299 Instruction *Retain = &*I;
300 if (GetBasicARCInstKind(Retain) != ARCInstKind::Retain)
66
Assuming the condition is false
67
Taking false branch
301 return nullptr;
302 if (GetArgRCIdentityRoot(Retain) != New)
68
Assuming the condition is false
69
Taking false branch
303 return nullptr;
304 return Retain;
70
Returning pointer (loaded from 'Retain'), which participates in a condition later
305}
306
307/// Create a call instruction with the correct funclet token. Should be used
308/// instead of calling CallInst::Create directly.
309static CallInst *
310createCallInst(FunctionType *FTy, Value *Func, ArrayRef<Value *> Args,
311 const Twine &NameStr, Instruction *InsertBefore,
312 const DenseMap<BasicBlock *, ColorVector> &BlockColors) {
313 SmallVector<OperandBundleDef, 1> OpBundles;
314 if (!BlockColors.empty()) {
315 const ColorVector &CV = BlockColors.find(InsertBefore->getParent())->second;
316 assert(CV.size() == 1 && "non-unique color for block!")((CV.size() == 1 && "non-unique color for block!") ? static_cast
<void> (0) : __assert_fail ("CV.size() == 1 && \"non-unique color for block!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/lib/Transforms/ObjCARC/ObjCARCContract.cpp"
, 316, __PRETTY_FUNCTION__))
;
317 Instruction *EHPad = CV.front()->getFirstNonPHI();
318 if (EHPad->isEHPad())
319 OpBundles.emplace_back("funclet", EHPad);
320 }
321
322 return CallInst::Create(FTy, Func, Args, OpBundles, NameStr, InsertBefore);
323}
324
325static CallInst *
326createCallInst(FunctionCallee Func, ArrayRef<Value *> Args, const Twine &NameStr,
327 Instruction *InsertBefore,
328 const DenseMap<BasicBlock *, ColorVector> &BlockColors) {
329 return createCallInst(Func.getFunctionType(), Func.getCallee(), Args, NameStr,
330 InsertBefore, BlockColors);
331}
332
333/// Attempt to merge an objc_release with a store, load, and objc_retain to form
334/// an objc_storeStrong. An objc_storeStrong:
335///
336/// objc_storeStrong(i8** %old_ptr, i8* new_value)
337///
338/// is equivalent to the following IR sequence:
339///
340/// ; Load old value.
341/// %old_value = load i8** %old_ptr (1)
342///
343/// ; Increment the new value and then release the old value. This must occur
344/// ; in order in case old_value releases new_value in its destructor causing
345/// ; us to potentially have a dangling ptr.
346/// tail call i8* @objc_retain(i8* %new_value) (2)
347/// tail call void @objc_release(i8* %old_value) (3)
348///
349/// ; Store the new_value into old_ptr
350/// store i8* %new_value, i8** %old_ptr (4)
351///
352/// The safety of this optimization is based around the following
353/// considerations:
354///
355/// 1. We are forming the store strong at the store. Thus to perform this
356/// optimization it must be safe to move the retain, load, and release to
357/// (4).
358/// 2. We need to make sure that any re-orderings of (1), (2), (3), (4) are
359/// safe.
360void ObjCARCContract::tryToContractReleaseIntoStoreStrong(
361 Instruction *Release, inst_iterator &Iter,
362 const DenseMap<BasicBlock *, ColorVector> &BlockColors) {
363 // See if we are releasing something that we just loaded.
364 auto *Load = dyn_cast<LoadInst>(GetArgRCIdentityRoot(Release));
15
Assuming the object is a 'LoadInst'
365 if (!Load
15.1
'Load' is non-null
15.1
'Load' is non-null
15.1
'Load' is non-null
|| !Load->isSimple())
16
Calling 'LoadInst::isSimple'
20
Returning from 'LoadInst::isSimple'
21
Taking false branch
366 return;
367
368 // For now, require everything to be in one basic block.
369 BasicBlock *BB = Release->getParent();
370 if (Load->getParent() != BB)
22
Assuming the condition is false
23
Taking false branch
371 return;
372
373 // First scan down the BB from Load, looking for a store of the RCIdentityRoot
374 // of Load's
375 StoreInst *Store =
376 findSafeStoreForStoreStrongContraction(Load, Release, PA, AA);
24
Calling 'findSafeStoreForStoreStrongContraction'
59
Returning from 'findSafeStoreForStoreStrongContraction'
377 // If we fail, bail.
378 if (!Store
59.1
'Store' is non-null
59.1
'Store' is non-null
59.1
'Store' is non-null
)
60
Taking false branch
379 return;
380
381 // Then find what new_value's RCIdentity Root is.
382 Value *New = GetRCIdentityRoot(Store->getValueOperand());
383
384 // Then walk up the BB and look for a retain on New without any intervening
385 // instructions which conservatively might decrement ref counts.
386 Instruction *Retain =
387 findRetainForStoreStrongContraction(New, Store, Release, PA);
61
Calling 'findRetainForStoreStrongContraction'
71
Returning from 'findRetainForStoreStrongContraction'
388
389 // If we fail, bail.
390 if (!Retain
71.1
'Retain' is non-null
71.1
'Retain' is non-null
71.1
'Retain' is non-null
)
72
Taking false branch
391 return;
392
393 Changed = true;
394 ++NumStoreStrongs;
395
396 LLVM_DEBUG(do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("objc-arc-contract")) { llvm::dbgs() << " Contracting retain, release into objc_storeStrong.\n"
<< " Old:\n" << " Store: " <<
*Store << "\n" << " Release: " <<
*Release << "\n" << " Retain: " <<
*Retain << "\n" << " Load: " <<
*Load << "\n"; } } while (false)
73
Assuming 'DebugFlag' is false
74
Loop condition is false. Exiting loop
397 llvm::dbgs() << " Contracting retain, release into objc_storeStrong.\n"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("objc-arc-contract")) { llvm::dbgs() << " Contracting retain, release into objc_storeStrong.\n"
<< " Old:\n" << " Store: " <<
*Store << "\n" << " Release: " <<
*Release << "\n" << " Retain: " <<
*Retain << "\n" << " Load: " <<
*Load << "\n"; } } while (false)
398 << " Old:\n"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("objc-arc-contract")) { llvm::dbgs() << " Contracting retain, release into objc_storeStrong.\n"
<< " Old:\n" << " Store: " <<
*Store << "\n" << " Release: " <<
*Release << "\n" << " Retain: " <<
*Retain << "\n" << " Load: " <<
*Load << "\n"; } } while (false)
399 << " Store: " << *Store << "\n"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("objc-arc-contract")) { llvm::dbgs() << " Contracting retain, release into objc_storeStrong.\n"
<< " Old:\n" << " Store: " <<
*Store << "\n" << " Release: " <<
*Release << "\n" << " Retain: " <<
*Retain << "\n" << " Load: " <<
*Load << "\n"; } } while (false)
400 << " Release: " << *Release << "\n"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("objc-arc-contract")) { llvm::dbgs() << " Contracting retain, release into objc_storeStrong.\n"
<< " Old:\n" << " Store: " <<
*Store << "\n" << " Release: " <<
*Release << "\n" << " Retain: " <<
*Retain << "\n" << " Load: " <<
*Load << "\n"; } } while (false)
401 << " Retain: " << *Retain << "\n"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("objc-arc-contract")) { llvm::dbgs() << " Contracting retain, release into objc_storeStrong.\n"
<< " Old:\n" << " Store: " <<
*Store << "\n" << " Release: " <<
*Release << "\n" << " Retain: " <<
*Retain << "\n" << " Load: " <<
*Load << "\n"; } } while (false)
402 << " Load: " << *Load << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("objc-arc-contract")) { llvm::dbgs() << " Contracting retain, release into objc_storeStrong.\n"
<< " Old:\n" << " Store: " <<
*Store << "\n" << " Release: " <<
*Release << "\n" << " Retain: " <<
*Retain << "\n" << " Load: " <<
*Load << "\n"; } } while (false)
;
403
404 LLVMContext &C = Release->getContext();
405 Type *I8X = PointerType::getUnqual(Type::getInt8Ty(C));
406 Type *I8XX = PointerType::getUnqual(I8X);
407
408 Value *Args[] = { Load->getPointerOperand(), New };
75
Initializing to a null pointer value
409 if (Args[0]->getType() != I8XX)
76
Called C++ object pointer is null
410 Args[0] = new BitCastInst(Args[0], I8XX, "", Store);
411 if (Args[1]->getType() != I8X)
412 Args[1] = new BitCastInst(Args[1], I8X, "", Store);
413 Function *Decl = EP.get(ARCRuntimeEntryPointKind::StoreStrong);
414 CallInst *StoreStrong = createCallInst(Decl, Args, "", Store, BlockColors);
415 StoreStrong->setDoesNotThrow();
416 StoreStrong->setDebugLoc(Store->getDebugLoc());
417
418 // We can't set the tail flag yet, because we haven't yet determined
419 // whether there are any escaping allocas. Remember this call, so that
420 // we can set the tail flag once we know it's safe.
421 StoreStrongCalls.insert(StoreStrong);
422
423 LLVM_DEBUG(llvm::dbgs() << " New Store Strong: " << *StoreStrongdo { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("objc-arc-contract")) { llvm::dbgs() << " New Store Strong: "
<< *StoreStrong << "\n"; } } while (false)
424 << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("objc-arc-contract")) { llvm::dbgs() << " New Store Strong: "
<< *StoreStrong << "\n"; } } while (false)
;
425
426 if (&*Iter == Retain) ++Iter;
427 if (&*Iter == Store) ++Iter;
428 Store->eraseFromParent();
429 Release->eraseFromParent();
430 EraseInstruction(Retain);
431 if (Load->use_empty())
432 Load->eraseFromParent();
433}
434
435bool ObjCARCContract::tryToPeepholeInstruction(
436 Function &F, Instruction *Inst, inst_iterator &Iter,
437 bool &TailOkForStoreStrongs,
438 const DenseMap<BasicBlock *, ColorVector> &BlockColors) {
439 // Only these library routines return their argument. In particular,
440 // objc_retainBlock does not necessarily return its argument.
441 ARCInstKind Class = GetBasicARCInstKind(Inst);
442 switch (Class) {
13
Control jumps to 'case Release:' at line 510
443 case ARCInstKind::FusedRetainAutorelease:
444 case ARCInstKind::FusedRetainAutoreleaseRV:
445 return false;
446 case ARCInstKind::Autorelease:
447 case ARCInstKind::AutoreleaseRV:
448 return contractAutorelease(F, Inst, Class);
449 case ARCInstKind::Retain:
450 // Attempt to convert retains to retainrvs if they are next to function
451 // calls.
452 if (!optimizeRetainCall(F, Inst))
453 return false;
454 // If we succeed in our optimization, fall through.
455 LLVM_FALLTHROUGH[[gnu::fallthrough]];
456 case ARCInstKind::RetainRV:
457 case ARCInstKind::ClaimRV: {
458 // If we're compiling for a target which needs a special inline-asm
459 // marker to do the return value optimization, insert it now.
460 if (!RVInstMarker)
461 return false;
462 BasicBlock::iterator BBI = Inst->getIterator();
463 BasicBlock *InstParent = Inst->getParent();
464
465 // Step up to see if the call immediately precedes the RV call.
466 // If it's an invoke, we have to cross a block boundary. And we have
467 // to carefully dodge no-op instructions.
468 do {
469 if (BBI == InstParent->begin()) {
470 BasicBlock *Pred = InstParent->getSinglePredecessor();
471 if (!Pred)
472 goto decline_rv_optimization;
473 BBI = Pred->getTerminator()->getIterator();
474 break;
475 }
476 --BBI;
477 } while (IsNoopInstruction(&*BBI));
478
479 if (GetRCIdentityRoot(&*BBI) == GetArgRCIdentityRoot(Inst)) {
480 LLVM_DEBUG(dbgs() << "Adding inline asm marker for the return value "do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("objc-arc-contract")) { dbgs() << "Adding inline asm marker for the return value "
"optimization.\n"; } } while (false)
481 "optimization.\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("objc-arc-contract")) { dbgs() << "Adding inline asm marker for the return value "
"optimization.\n"; } } while (false)
;
482 Changed = true;
483 InlineAsm *IA =
484 InlineAsm::get(FunctionType::get(Type::getVoidTy(Inst->getContext()),
485 /*isVarArg=*/false),
486 RVInstMarker->getString(),
487 /*Constraints=*/"", /*hasSideEffects=*/true);
488
489 createCallInst(IA, None, "", Inst, BlockColors);
490 }
491 decline_rv_optimization:
492 return false;
493 }
494 case ARCInstKind::InitWeak: {
495 // objc_initWeak(p, null) => *p = null
496 CallInst *CI = cast<CallInst>(Inst);
497 if (IsNullOrUndef(CI->getArgOperand(1))) {
498 Value *Null = ConstantPointerNull::get(cast<PointerType>(CI->getType()));
499 Changed = true;
500 new StoreInst(Null, CI->getArgOperand(0), CI);
501
502 LLVM_DEBUG(dbgs() << "OBJCARCContract: Old = " << *CI << "\n"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("objc-arc-contract")) { dbgs() << "OBJCARCContract: Old = "
<< *CI << "\n" << " New = "
<< *Null << "\n"; } } while (false)
503 << " New = " << *Null << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("objc-arc-contract")) { dbgs() << "OBJCARCContract: Old = "
<< *CI << "\n" << " New = "
<< *Null << "\n"; } } while (false)
;
504
505 CI->replaceAllUsesWith(Null);
506 CI->eraseFromParent();
507 }
508 return true;
509 }
510 case ARCInstKind::Release:
511 // Try to form an objc store strong from our release. If we fail, there is
512 // nothing further to do below, so continue.
513 tryToContractReleaseIntoStoreStrong(Inst, Iter, BlockColors);
14
Calling 'ObjCARCContract::tryToContractReleaseIntoStoreStrong'
514 return true;
515 case ARCInstKind::User:
516 // Be conservative if the function has any alloca instructions.
517 // Technically we only care about escaping alloca instructions,
518 // but this is sufficient to handle some interesting cases.
519 if (isa<AllocaInst>(Inst))
520 TailOkForStoreStrongs = false;
521 return true;
522 case ARCInstKind::IntrinsicUser:
523 // Remove calls to @llvm.objc.clang.arc.use(...).
524 Changed = true;
525 Inst->eraseFromParent();
526 return true;
527 default:
528 return true;
529 }
530}
531
532//===----------------------------------------------------------------------===//
533// Top Level Driver
534//===----------------------------------------------------------------------===//
535
536bool ObjCARCContract::init(Module &M) {
537 // If nothing in the Module uses ARC, don't do anything.
538 Run = ModuleHasARC(M);
539 if (!Run)
540 return false;
541
542 EP.init(&M);
543
544 // Initialize RVInstMarker.
545 const char *MarkerKey = "clang.arc.retainAutoreleasedReturnValueMarker";
546 RVInstMarker = dyn_cast_or_null<MDString>(M.getModuleFlag(MarkerKey));
547
548 return false;
549}
550
551bool ObjCARCContract::run(Function &F, AAResults *A, DominatorTree *D) {
552 if (!EnableARCOpts)
2
Assuming 'EnableARCOpts' is true
3
Taking false branch
553 return false;
554
555 // If nothing in the Module uses ARC, don't do anything.
556 if (!Run
3.1
Field 'Run' is true
3.1
Field 'Run' is true
3.1
Field 'Run' is true
)
4
Taking false branch
557 return false;
558
559 Changed = false;
560 AA = A;
561 DT = D;
562 PA.setAA(A);
563
564 DenseMap<BasicBlock *, ColorVector> BlockColors;
565 if (F.hasPersonalityFn() &&
5
Assuming the condition is false
566 isScopedEHPersonality(classifyEHPersonality(F.getPersonalityFn())))
567 BlockColors = colorEHFunclets(F);
568
569 LLVM_DEBUG(llvm::dbgs() << "**** ObjCARC Contract ****\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("objc-arc-contract")) { llvm::dbgs() << "**** ObjCARC Contract ****\n"
; } } while (false)
;
6
Assuming 'DebugFlag' is false
7
Loop condition is false. Exiting loop
570
571 // Track whether it's ok to mark objc_storeStrong calls with the "tail"
572 // keyword. Be conservative if the function has variadic arguments.
573 // It seems that functions which "return twice" are also unsafe for the
574 // "tail" argument, because they are setjmp, which could need to
575 // return to an earlier stack state.
576 bool TailOkForStoreStrongs =
577 !F.isVarArg() && !F.callsFunctionThatReturnsTwice();
8
Assuming the condition is false
578
579 // For ObjC library calls which return their argument, replace uses of the
580 // argument with uses of the call return value, if it dominates the use. This
581 // reduces register pressure.
582 for (inst_iterator I = inst_begin(&F), E = inst_end(&F); I != E;) {
9
Loop condition is true. Entering loop body
583 Instruction *Inst = &*I++;
584
585 LLVM_DEBUG(dbgs() << "Visiting: " << *Inst << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("objc-arc-contract")) { dbgs() << "Visiting: " <<
*Inst << "\n"; } } while (false)
;
10
Assuming 'DebugFlag' is false
11
Loop condition is false. Exiting loop
586
587 // First try to peephole Inst. If there is nothing further we can do in
588 // terms of undoing objc-arc-expand, process the next inst.
589 if (tryToPeepholeInstruction(F, Inst, I, TailOkForStoreStrongs,
12
Calling 'ObjCARCContract::tryToPeepholeInstruction'
590 BlockColors))
591 continue;
592
593 // Otherwise, try to undo objc-arc-expand.
594
595 // Don't use GetArgRCIdentityRoot because we don't want to look through bitcasts
596 // and such; to do the replacement, the argument must have type i8*.
597
598 // Function for replacing uses of Arg dominated by Inst.
599 auto ReplaceArgUses = [Inst, this](Value *Arg) {
600 // If we're compiling bugpointed code, don't get in trouble.
601 if (!isa<Instruction>(Arg) && !isa<Argument>(Arg))
602 return;
603
604 // Look through the uses of the pointer.
605 for (Value::use_iterator UI = Arg->use_begin(), UE = Arg->use_end();
606 UI != UE; ) {
607 // Increment UI now, because we may unlink its element.
608 Use &U = *UI++;
609 unsigned OperandNo = U.getOperandNo();
610
611 // If the call's return value dominates a use of the call's argument
612 // value, rewrite the use to use the return value. We check for
613 // reachability here because an unreachable call is considered to
614 // trivially dominate itself, which would lead us to rewriting its
615 // argument in terms of its return value, which would lead to
616 // infinite loops in GetArgRCIdentityRoot.
617 if (!DT->isReachableFromEntry(U) || !DT->dominates(Inst, U))
618 continue;
619
620 Changed = true;
621 Instruction *Replacement = Inst;
622 Type *UseTy = U.get()->getType();
623 if (PHINode *PHI = dyn_cast<PHINode>(U.getUser())) {
624 // For PHI nodes, insert the bitcast in the predecessor block.
625 unsigned ValNo = PHINode::getIncomingValueNumForOperand(OperandNo);
626 BasicBlock *IncomingBB = PHI->getIncomingBlock(ValNo);
627 if (Replacement->getType() != UseTy) {
628 // A catchswitch is both a pad and a terminator, meaning a basic
629 // block with a catchswitch has no insertion point. Keep going up
630 // the dominator tree until we find a non-catchswitch.
631 BasicBlock *InsertBB = IncomingBB;
632 while (isa<CatchSwitchInst>(InsertBB->getFirstNonPHI())) {
633 InsertBB = DT->getNode(InsertBB)->getIDom()->getBlock();
634 }
635
636 assert(DT->dominates(Inst, &InsertBB->back()) &&((DT->dominates(Inst, &InsertBB->back()) &&
"Invalid insertion point for bitcast") ? static_cast<void
> (0) : __assert_fail ("DT->dominates(Inst, &InsertBB->back()) && \"Invalid insertion point for bitcast\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/lib/Transforms/ObjCARC/ObjCARCContract.cpp"
, 637, __PRETTY_FUNCTION__))
637 "Invalid insertion point for bitcast")((DT->dominates(Inst, &InsertBB->back()) &&
"Invalid insertion point for bitcast") ? static_cast<void
> (0) : __assert_fail ("DT->dominates(Inst, &InsertBB->back()) && \"Invalid insertion point for bitcast\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/lib/Transforms/ObjCARC/ObjCARCContract.cpp"
, 637, __PRETTY_FUNCTION__))
;
638 Replacement =
639 new BitCastInst(Replacement, UseTy, "", &InsertBB->back());
640 }
641
642 // While we're here, rewrite all edges for this PHI, rather
643 // than just one use at a time, to minimize the number of
644 // bitcasts we emit.
645 for (unsigned i = 0, e = PHI->getNumIncomingValues(); i != e; ++i)
646 if (PHI->getIncomingBlock(i) == IncomingBB) {
647 // Keep the UI iterator valid.
648 if (UI != UE &&
649 &PHI->getOperandUse(
650 PHINode::getOperandNumForIncomingValue(i)) == &*UI)
651 ++UI;
652 PHI->setIncomingValue(i, Replacement);
653 }
654 } else {
655 if (Replacement->getType() != UseTy)
656 Replacement = new BitCastInst(Replacement, UseTy, "",
657 cast<Instruction>(U.getUser()));
658 U.set(Replacement);
659 }
660 }
661 };
662
663 Value *Arg = cast<CallInst>(Inst)->getArgOperand(0);
664 Value *OrigArg = Arg;
665
666 // TODO: Change this to a do-while.
667 for (;;) {
668 ReplaceArgUses(Arg);
669
670 // If Arg is a no-op casted pointer, strip one level of casts and iterate.
671 if (const BitCastInst *BI = dyn_cast<BitCastInst>(Arg))
672 Arg = BI->getOperand(0);
673 else if (isa<GEPOperator>(Arg) &&
674 cast<GEPOperator>(Arg)->hasAllZeroIndices())
675 Arg = cast<GEPOperator>(Arg)->getPointerOperand();
676 else if (isa<GlobalAlias>(Arg) &&
677 !cast<GlobalAlias>(Arg)->isInterposable())
678 Arg = cast<GlobalAlias>(Arg)->getAliasee();
679 else {
680 // If Arg is a PHI node, get PHIs that are equivalent to it and replace
681 // their uses.
682 if (PHINode *PN = dyn_cast<PHINode>(Arg)) {
683 SmallVector<Value *, 1> PHIList;
684 getEquivalentPHIs(*PN, PHIList);
685 for (Value *PHI : PHIList)
686 ReplaceArgUses(PHI);
687 }
688 break;
689 }
690 }
691
692 // Replace bitcast users of Arg that are dominated by Inst.
693 SmallVector<BitCastInst *, 2> BitCastUsers;
694
695 // Add all bitcast users of the function argument first.
696 for (User *U : OrigArg->users())
697 if (auto *BC = dyn_cast<BitCastInst>(U))
698 BitCastUsers.push_back(BC);
699
700 // Replace the bitcasts with the call return. Iterate until list is empty.
701 while (!BitCastUsers.empty()) {
702 auto *BC = BitCastUsers.pop_back_val();
703 for (User *U : BC->users())
704 if (auto *B = dyn_cast<BitCastInst>(U))
705 BitCastUsers.push_back(B);
706
707 ReplaceArgUses(BC);
708 }
709 }
710
711 // If this function has no escaping allocas or suspicious vararg usage,
712 // objc_storeStrong calls can be marked with the "tail" keyword.
713 if (TailOkForStoreStrongs)
714 for (CallInst *CI : StoreStrongCalls)
715 CI->setTailCall();
716 StoreStrongCalls.clear();
717
718 return Changed;
719}
720
721//===----------------------------------------------------------------------===//
722// Misc Pass Manager
723//===----------------------------------------------------------------------===//
724
725char ObjCARCContractLegacyPass::ID = 0;
726INITIALIZE_PASS_BEGIN(ObjCARCContractLegacyPass, "objc-arc-contract",static void *initializeObjCARCContractLegacyPassPassOnce(PassRegistry
&Registry) {
727 "ObjC ARC contraction", false, false)static void *initializeObjCARCContractLegacyPassPassOnce(PassRegistry
&Registry) {
728INITIALIZE_PASS_DEPENDENCY(AAResultsWrapperPass)initializeAAResultsWrapperPassPass(Registry);
729INITIALIZE_PASS_DEPENDENCY(DominatorTreeWrapperPass)initializeDominatorTreeWrapperPassPass(Registry);
730INITIALIZE_PASS_END(ObjCARCContractLegacyPass, "objc-arc-contract",PassInfo *PI = new PassInfo( "ObjC ARC contraction", "objc-arc-contract"
, &ObjCARCContractLegacyPass::ID, PassInfo::NormalCtor_t(
callDefaultCtor<ObjCARCContractLegacyPass>), false, false
); Registry.registerPass(*PI, true); return PI; } static llvm
::once_flag InitializeObjCARCContractLegacyPassPassFlag; void
llvm::initializeObjCARCContractLegacyPassPass(PassRegistry &
Registry) { llvm::call_once(InitializeObjCARCContractLegacyPassPassFlag
, initializeObjCARCContractLegacyPassPassOnce, std::ref(Registry
)); }
731 "ObjC ARC contraction", false, false)PassInfo *PI = new PassInfo( "ObjC ARC contraction", "objc-arc-contract"
, &ObjCARCContractLegacyPass::ID, PassInfo::NormalCtor_t(
callDefaultCtor<ObjCARCContractLegacyPass>), false, false
); Registry.registerPass(*PI, true); return PI; } static llvm
::once_flag InitializeObjCARCContractLegacyPassPassFlag; void
llvm::initializeObjCARCContractLegacyPassPass(PassRegistry &
Registry) { llvm::call_once(InitializeObjCARCContractLegacyPassPassFlag
, initializeObjCARCContractLegacyPassPassOnce, std::ref(Registry
)); }
732
733void ObjCARCContractLegacyPass::getAnalysisUsage(AnalysisUsage &AU) const {
734 AU.addRequired<AAResultsWrapperPass>();
735 AU.addRequired<DominatorTreeWrapperPass>();
736 AU.setPreservesCFG();
737}
738
739Pass *llvm::createObjCARCContractPass() {
740 return new ObjCARCContractLegacyPass();
741}
742
743bool ObjCARCContractLegacyPass::doInitialization(Module &M) {
744 return OCARCC.init(M);
745}
746
747bool ObjCARCContractLegacyPass::runOnFunction(Function &F) {
748 auto *AA = &getAnalysis<AAResultsWrapperPass>().getAAResults();
749 auto *DT = &getAnalysis<DominatorTreeWrapperPass>().getDomTree();
750 return OCARCC.run(F, AA, DT);
751}
752
753PreservedAnalyses ObjCARCContractPass::run(Function &F,
754 FunctionAnalysisManager &AM) {
755 ObjCARCContract OCAC;
756 OCAC.init(*F.getParent());
757
758 bool Changed = OCAC.run(F, &AM.getResult<AAManager>(F),
1
Calling 'ObjCARCContract::run'
759 &AM.getResult<DominatorTreeAnalysis>(F));
760 if (Changed) {
761 PreservedAnalyses PA;
762 PA.preserveSet<CFGAnalyses>();
763 return PA;
764 }
765 return PreservedAnalyses::all();
766}

/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h

1//===- llvm/Instructions.h - Instruction subclass definitions ---*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file exposes the class definitions of all of the subclasses of the
10// Instruction class. This is meant to be an easy way to get access to all
11// instruction subclasses.
12//
13//===----------------------------------------------------------------------===//
14
15#ifndef LLVM_IR_INSTRUCTIONS_H
16#define LLVM_IR_INSTRUCTIONS_H
17
18#include "llvm/ADT/ArrayRef.h"
19#include "llvm/ADT/Bitfields.h"
20#include "llvm/ADT/None.h"
21#include "llvm/ADT/STLExtras.h"
22#include "llvm/ADT/SmallVector.h"
23#include "llvm/ADT/StringRef.h"
24#include "llvm/ADT/Twine.h"
25#include "llvm/ADT/iterator.h"
26#include "llvm/ADT/iterator_range.h"
27#include "llvm/IR/Attributes.h"
28#include "llvm/IR/BasicBlock.h"
29#include "llvm/IR/CallingConv.h"
30#include "llvm/IR/CFG.h"
31#include "llvm/IR/Constant.h"
32#include "llvm/IR/DerivedTypes.h"
33#include "llvm/IR/Function.h"
34#include "llvm/IR/InstrTypes.h"
35#include "llvm/IR/Instruction.h"
36#include "llvm/IR/OperandTraits.h"
37#include "llvm/IR/Type.h"
38#include "llvm/IR/Use.h"
39#include "llvm/IR/User.h"
40#include "llvm/IR/Value.h"
41#include "llvm/Support/AtomicOrdering.h"
42#include "llvm/Support/Casting.h"
43#include "llvm/Support/ErrorHandling.h"
44#include <cassert>
45#include <cstddef>
46#include <cstdint>
47#include <iterator>
48
49namespace llvm {
50
51class APInt;
52class ConstantInt;
53class DataLayout;
54class LLVMContext;
55
56//===----------------------------------------------------------------------===//
57// AllocaInst Class
58//===----------------------------------------------------------------------===//
59
60/// an instruction to allocate memory on the stack
61class AllocaInst : public UnaryInstruction {
62 Type *AllocatedType;
63
64 using AlignmentField = AlignmentBitfieldElementT<0>;
65 using UsedWithInAllocaField = BoolBitfieldElementT<AlignmentField::NextBit>;
66 using SwiftErrorField = BoolBitfieldElementT<UsedWithInAllocaField::NextBit>;
67 static_assert(Bitfield::areContiguous<AlignmentField, UsedWithInAllocaField,
68 SwiftErrorField>(),
69 "Bitfields must be contiguous");
70
71protected:
72 // Note: Instruction needs to be a friend here to call cloneImpl.
73 friend class Instruction;
74
75 AllocaInst *cloneImpl() const;
76
77public:
78 explicit AllocaInst(Type *Ty, unsigned AddrSpace, Value *ArraySize,
79 const Twine &Name, Instruction *InsertBefore);
80 AllocaInst(Type *Ty, unsigned AddrSpace, Value *ArraySize,
81 const Twine &Name, BasicBlock *InsertAtEnd);
82
83 AllocaInst(Type *Ty, unsigned AddrSpace, const Twine &Name,
84 Instruction *InsertBefore);
85 AllocaInst(Type *Ty, unsigned AddrSpace,
86 const Twine &Name, BasicBlock *InsertAtEnd);
87
88 AllocaInst(Type *Ty, unsigned AddrSpace, Value *ArraySize, Align Align,
89 const Twine &Name = "", Instruction *InsertBefore = nullptr);
90 AllocaInst(Type *Ty, unsigned AddrSpace, Value *ArraySize, Align Align,
91 const Twine &Name, BasicBlock *InsertAtEnd);
92
93 /// Return true if there is an allocation size parameter to the allocation
94 /// instruction that is not 1.
95 bool isArrayAllocation() const;
96
97 /// Get the number of elements allocated. For a simple allocation of a single
98 /// element, this will return a constant 1 value.
99 const Value *getArraySize() const { return getOperand(0); }
100 Value *getArraySize() { return getOperand(0); }
101
102 /// Overload to return most specific pointer type.
103 PointerType *getType() const {
104 return cast<PointerType>(Instruction::getType());
105 }
106
107 /// Get allocation size in bits. Returns None if size can't be determined,
108 /// e.g. in case of a VLA.
109 Optional<TypeSize> getAllocationSizeInBits(const DataLayout &DL) const;
110
111 /// Return the type that is being allocated by the instruction.
112 Type *getAllocatedType() const { return AllocatedType; }
113 /// for use only in special circumstances that need to generically
114 /// transform a whole instruction (eg: IR linking and vectorization).
115 void setAllocatedType(Type *Ty) { AllocatedType = Ty; }
116
117 /// Return the alignment of the memory that is being allocated by the
118 /// instruction.
119 Align getAlign() const {
120 return Align(1ULL << getSubclassData<AlignmentField>());
121 }
122
123 void setAlignment(Align Align) {
124 setSubclassData<AlignmentField>(Log2(Align));
125 }
126
127 // FIXME: Remove this one transition to Align is over.
128 unsigned getAlignment() const { return getAlign().value(); }
129
130 /// Return true if this alloca is in the entry block of the function and is a
131 /// constant size. If so, the code generator will fold it into the
132 /// prolog/epilog code, so it is basically free.
133 bool isStaticAlloca() const;
134
135 /// Return true if this alloca is used as an inalloca argument to a call. Such
136 /// allocas are never considered static even if they are in the entry block.
137 bool isUsedWithInAlloca() const {
138 return getSubclassData<UsedWithInAllocaField>();
139 }
140
141 /// Specify whether this alloca is used to represent the arguments to a call.
142 void setUsedWithInAlloca(bool V) {
143 setSubclassData<UsedWithInAllocaField>(V);
144 }
145
146 /// Return true if this alloca is used as a swifterror argument to a call.
147 bool isSwiftError() const { return getSubclassData<SwiftErrorField>(); }
148 /// Specify whether this alloca is used to represent a swifterror.
149 void setSwiftError(bool V) { setSubclassData<SwiftErrorField>(V); }
150
151 // Methods for support type inquiry through isa, cast, and dyn_cast:
152 static bool classof(const Instruction *I) {
153 return (I->getOpcode() == Instruction::Alloca);
154 }
155 static bool classof(const Value *V) {
156 return isa<Instruction>(V) && classof(cast<Instruction>(V));
157 }
158
159private:
160 // Shadow Instruction::setInstructionSubclassData with a private forwarding
161 // method so that subclasses cannot accidentally use it.
162 template <typename Bitfield>
163 void setSubclassData(typename Bitfield::Type Value) {
164 Instruction::setSubclassData<Bitfield>(Value);
165 }
166};
167
168//===----------------------------------------------------------------------===//
169// LoadInst Class
170//===----------------------------------------------------------------------===//
171
172/// An instruction for reading from memory. This uses the SubclassData field in
173/// Value to store whether or not the load is volatile.
174class LoadInst : public UnaryInstruction {
175 using VolatileField = BoolBitfieldElementT<0>;
176 using AlignmentField = AlignmentBitfieldElementT<VolatileField::NextBit>;
177 using OrderingField = AtomicOrderingBitfieldElementT<AlignmentField::NextBit>;
178 static_assert(
179 Bitfield::areContiguous<VolatileField, AlignmentField, OrderingField>(),
180 "Bitfields must be contiguous");
181
182 void AssertOK();
183
184protected:
185 // Note: Instruction needs to be a friend here to call cloneImpl.
186 friend class Instruction;
187
188 LoadInst *cloneImpl() const;
189
190public:
191 LoadInst(Type *Ty, Value *Ptr, const Twine &NameStr,
192 Instruction *InsertBefore);
193 LoadInst(Type *Ty, Value *Ptr, const Twine &NameStr, BasicBlock *InsertAtEnd);
194 LoadInst(Type *Ty, Value *Ptr, const Twine &NameStr, bool isVolatile,
195 Instruction *InsertBefore);
196 LoadInst(Type *Ty, Value *Ptr, const Twine &NameStr, bool isVolatile,
197 BasicBlock *InsertAtEnd);
198 LoadInst(Type *Ty, Value *Ptr, const Twine &NameStr, bool isVolatile,
199 Align Align, Instruction *InsertBefore = nullptr);
200 LoadInst(Type *Ty, Value *Ptr, const Twine &NameStr, bool isVolatile,
201 Align Align, BasicBlock *InsertAtEnd);
202 LoadInst(Type *Ty, Value *Ptr, const Twine &NameStr, bool isVolatile,
203 Align Align, AtomicOrdering Order,
204 SyncScope::ID SSID = SyncScope::System,
205 Instruction *InsertBefore = nullptr);
206 LoadInst(Type *Ty, Value *Ptr, const Twine &NameStr, bool isVolatile,
207 Align Align, AtomicOrdering Order, SyncScope::ID SSID,
208 BasicBlock *InsertAtEnd);
209
210 /// Return true if this is a load from a volatile memory location.
211 bool isVolatile() const { return getSubclassData<VolatileField>(); }
212
213 /// Specify whether this is a volatile load or not.
214 void setVolatile(bool V) { setSubclassData<VolatileField>(V); }
215
216 /// Return the alignment of the access that is being performed.
217 /// FIXME: Remove this function once transition to Align is over.
218 /// Use getAlign() instead.
219 unsigned getAlignment() const { return getAlign().value(); }
220
221 /// Return the alignment of the access that is being performed.
222 Align getAlign() const {
223 return Align(1ULL << (getSubclassData<AlignmentField>()));
224 }
225
226 void setAlignment(Align Align) {
227 setSubclassData<AlignmentField>(Log2(Align));
228 }
229
230 /// Returns the ordering constraint of this load instruction.
231 AtomicOrdering getOrdering() const {
232 return getSubclassData<OrderingField>();
233 }
234 /// Sets the ordering constraint of this load instruction. May not be Release
235 /// or AcquireRelease.
236 void setOrdering(AtomicOrdering Ordering) {
237 setSubclassData<OrderingField>(Ordering);
238 }
239
240 /// Returns the synchronization scope ID of this load instruction.
241 SyncScope::ID getSyncScopeID() const {
242 return SSID;
243 }
244
245 /// Sets the synchronization scope ID of this load instruction.
246 void setSyncScopeID(SyncScope::ID SSID) {
247 this->SSID = SSID;
248 }
249
250 /// Sets the ordering constraint and the synchronization scope ID of this load
251 /// instruction.
252 void setAtomic(AtomicOrdering Ordering,
253 SyncScope::ID SSID = SyncScope::System) {
254 setOrdering(Ordering);
255 setSyncScopeID(SSID);
256 }
257
258 bool isSimple() const { return !isAtomic() && !isVolatile(); }
17
Assuming the condition is true
18
Assuming the condition is true
19
Returning the value 1, which participates in a condition later
259
260 bool isUnordered() const {
261 return (getOrdering() == AtomicOrdering::NotAtomic ||
262 getOrdering() == AtomicOrdering::Unordered) &&
263 !isVolatile();
264 }
265
266 Value *getPointerOperand() { return getOperand(0); }
267 const Value *getPointerOperand() const { return getOperand(0); }
268 static unsigned getPointerOperandIndex() { return 0U; }
269 Type *getPointerOperandType() const { return getPointerOperand()->getType(); }
270
271 /// Returns the address space of the pointer operand.
272 unsigned getPointerAddressSpace() const {
273 return getPointerOperandType()->getPointerAddressSpace();
274 }
275
276 // Methods for support type inquiry through isa, cast, and dyn_cast:
277 static bool classof(const Instruction *I) {
278 return I->getOpcode() == Instruction::Load;
279 }
280 static bool classof(const Value *V) {
281 return isa<Instruction>(V) && classof(cast<Instruction>(V));
282 }
283
284private:
285 // Shadow Instruction::setInstructionSubclassData with a private forwarding
286 // method so that subclasses cannot accidentally use it.
287 template <typename Bitfield>
288 void setSubclassData(typename Bitfield::Type Value) {
289 Instruction::setSubclassData<Bitfield>(Value);
290 }
291
292 /// The synchronization scope ID of this load instruction. Not quite enough
293 /// room in SubClassData for everything, so synchronization scope ID gets its
294 /// own field.
295 SyncScope::ID SSID;
296};
297
298//===----------------------------------------------------------------------===//
299// StoreInst Class
300//===----------------------------------------------------------------------===//
301
302/// An instruction for storing to memory.
303class StoreInst : public Instruction {
304 using VolatileField = BoolBitfieldElementT<0>;
305 using AlignmentField = AlignmentBitfieldElementT<VolatileField::NextBit>;
306 using OrderingField = AtomicOrderingBitfieldElementT<AlignmentField::NextBit>;
307 static_assert(
308 Bitfield::areContiguous<VolatileField, AlignmentField, OrderingField>(),
309 "Bitfields must be contiguous");
310
311 void AssertOK();
312
313protected:
314 // Note: Instruction needs to be a friend here to call cloneImpl.
315 friend class Instruction;
316
317 StoreInst *cloneImpl() const;
318
319public:
320 StoreInst(Value *Val, Value *Ptr, Instruction *InsertBefore);
321 StoreInst(Value *Val, Value *Ptr, BasicBlock *InsertAtEnd);
322 StoreInst(Value *Val, Value *Ptr, bool isVolatile, Instruction *InsertBefore);
323 StoreInst(Value *Val, Value *Ptr, bool isVolatile, BasicBlock *InsertAtEnd);
324 StoreInst(Value *Val, Value *Ptr, bool isVolatile, Align Align,
325 Instruction *InsertBefore = nullptr);
326 StoreInst(Value *Val, Value *Ptr, bool isVolatile, Align Align,
327 BasicBlock *InsertAtEnd);
328 StoreInst(Value *Val, Value *Ptr, bool isVolatile, Align Align,
329 AtomicOrdering Order, SyncScope::ID SSID = SyncScope::System,
330 Instruction *InsertBefore = nullptr);
331 StoreInst(Value *Val, Value *Ptr, bool isVolatile, Align Align,
332 AtomicOrdering Order, SyncScope::ID SSID, BasicBlock *InsertAtEnd);
333
334 // allocate space for exactly two operands
335 void *operator new(size_t s) {
336 return User::operator new(s, 2);
337 }
338
339 /// Return true if this is a store to a volatile memory location.
340 bool isVolatile() const { return getSubclassData<VolatileField>(); }
341
342 /// Specify whether this is a volatile store or not.
343 void setVolatile(bool V) { setSubclassData<VolatileField>(V); }
344
345 /// Transparently provide more efficient getOperand methods.
346 DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value)public: inline Value *getOperand(unsigned) const; inline void
setOperand(unsigned, Value*); inline op_iterator op_begin();
inline const_op_iterator op_begin() const; inline op_iterator
op_end(); inline const_op_iterator op_end() const; protected
: template <int> inline Use &Op(); template <int
> inline const Use &Op() const; public: inline unsigned
getNumOperands() const
;
347
348 /// Return the alignment of the access that is being performed
349 /// FIXME: Remove this function once transition to Align is over.
350 /// Use getAlign() instead.
351 unsigned getAlignment() const { return getAlign().value(); }
352
353 Align getAlign() const {
354 return Align(1ULL << (getSubclassData<AlignmentField>()));
355 }
356
357 void setAlignment(Align Align) {
358 setSubclassData<AlignmentField>(Log2(Align));
359 }
360
361 /// Returns the ordering constraint of this store instruction.
362 AtomicOrdering getOrdering() const {
363 return getSubclassData<OrderingField>();
364 }
365
366 /// Sets the ordering constraint of this store instruction. May not be
367 /// Acquire or AcquireRelease.
368 void setOrdering(AtomicOrdering Ordering) {
369 setSubclassData<OrderingField>(Ordering);
370 }
371
372 /// Returns the synchronization scope ID of this store instruction.
373 SyncScope::ID getSyncScopeID() const {
374 return SSID;
375 }
376
377 /// Sets the synchronization scope ID of this store instruction.
378 void setSyncScopeID(SyncScope::ID SSID) {
379 this->SSID = SSID;
380 }
381
382 /// Sets the ordering constraint and the synchronization scope ID of this
383 /// store instruction.
384 void setAtomic(AtomicOrdering Ordering,
385 SyncScope::ID SSID = SyncScope::System) {
386 setOrdering(Ordering);
387 setSyncScopeID(SSID);
388 }
389
390 bool isSimple() const { return !isAtomic() && !isVolatile(); }
391
392 bool isUnordered() const {
393 return (getOrdering() == AtomicOrdering::NotAtomic ||
394 getOrdering() == AtomicOrdering::Unordered) &&
395 !isVolatile();
396 }
397
398 Value *getValueOperand() { return getOperand(0); }
399 const Value *getValueOperand() const { return getOperand(0); }
400
401 Value *getPointerOperand() { return getOperand(1); }
402 const Value *getPointerOperand() const { return getOperand(1); }
403 static unsigned getPointerOperandIndex() { return 1U; }
404 Type *getPointerOperandType() const { return getPointerOperand()->getType(); }
405
406 /// Returns the address space of the pointer operand.
407 unsigned getPointerAddressSpace() const {
408 return getPointerOperandType()->getPointerAddressSpace();
409 }
410
411 // Methods for support type inquiry through isa, cast, and dyn_cast:
412 static bool classof(const Instruction *I) {
413 return I->getOpcode() == Instruction::Store;
414 }
415 static bool classof(const Value *V) {
416 return isa<Instruction>(V) && classof(cast<Instruction>(V));
417 }
418
419private:
420 // Shadow Instruction::setInstructionSubclassData with a private forwarding
421 // method so that subclasses cannot accidentally use it.
422 template <typename Bitfield>
423 void setSubclassData(typename Bitfield::Type Value) {
424 Instruction::setSubclassData<Bitfield>(Value);
425 }
426
427 /// The synchronization scope ID of this store instruction. Not quite enough
428 /// room in SubClassData for everything, so synchronization scope ID gets its
429 /// own field.
430 SyncScope::ID SSID;
431};
432
433template <>
434struct OperandTraits<StoreInst> : public FixedNumOperandTraits<StoreInst, 2> {
435};
436
437DEFINE_TRANSPARENT_OPERAND_ACCESSORS(StoreInst, Value)StoreInst::op_iterator StoreInst::op_begin() { return OperandTraits
<StoreInst>::op_begin(this); } StoreInst::const_op_iterator
StoreInst::op_begin() const { return OperandTraits<StoreInst
>::op_begin(const_cast<StoreInst*>(this)); } StoreInst
::op_iterator StoreInst::op_end() { return OperandTraits<StoreInst
>::op_end(this); } StoreInst::const_op_iterator StoreInst::
op_end() const { return OperandTraits<StoreInst>::op_end
(const_cast<StoreInst*>(this)); } Value *StoreInst::getOperand
(unsigned i_nocapture) const { ((i_nocapture < OperandTraits
<StoreInst>::operands(this) && "getOperand() out of range!"
) ? static_cast<void> (0) : __assert_fail ("i_nocapture < OperandTraits<StoreInst>::operands(this) && \"getOperand() out of range!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 437, __PRETTY_FUNCTION__)); return cast_or_null<Value>
( OperandTraits<StoreInst>::op_begin(const_cast<StoreInst
*>(this))[i_nocapture].get()); } void StoreInst::setOperand
(unsigned i_nocapture, Value *Val_nocapture) { ((i_nocapture <
OperandTraits<StoreInst>::operands(this) && "setOperand() out of range!"
) ? static_cast<void> (0) : __assert_fail ("i_nocapture < OperandTraits<StoreInst>::operands(this) && \"setOperand() out of range!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 437, __PRETTY_FUNCTION__)); OperandTraits<StoreInst>::
op_begin(this)[i_nocapture] = Val_nocapture; } unsigned StoreInst
::getNumOperands() const { return OperandTraits<StoreInst>
::operands(this); } template <int Idx_nocapture> Use &
StoreInst::Op() { return this->OpFrom<Idx_nocapture>
(this); } template <int Idx_nocapture> const Use &StoreInst
::Op() const { return this->OpFrom<Idx_nocapture>(this
); }
438
439//===----------------------------------------------------------------------===//
440// FenceInst Class
441//===----------------------------------------------------------------------===//
442
443/// An instruction for ordering other memory operations.
444class FenceInst : public Instruction {
445 using OrderingField = AtomicOrderingBitfieldElementT<0>;
446
447 void Init(AtomicOrdering Ordering, SyncScope::ID SSID);
448
449protected:
450 // Note: Instruction needs to be a friend here to call cloneImpl.
451 friend class Instruction;
452
453 FenceInst *cloneImpl() const;
454
455public:
456 // Ordering may only be Acquire, Release, AcquireRelease, or
457 // SequentiallyConsistent.
458 FenceInst(LLVMContext &C, AtomicOrdering Ordering,
459 SyncScope::ID SSID = SyncScope::System,
460 Instruction *InsertBefore = nullptr);
461 FenceInst(LLVMContext &C, AtomicOrdering Ordering, SyncScope::ID SSID,
462 BasicBlock *InsertAtEnd);
463
464 // allocate space for exactly zero operands
465 void *operator new(size_t s) {
466 return User::operator new(s, 0);
467 }
468
469 /// Returns the ordering constraint of this fence instruction.
470 AtomicOrdering getOrdering() const {
471 return getSubclassData<OrderingField>();
472 }
473
474 /// Sets the ordering constraint of this fence instruction. May only be
475 /// Acquire, Release, AcquireRelease, or SequentiallyConsistent.
476 void setOrdering(AtomicOrdering Ordering) {
477 setSubclassData<OrderingField>(Ordering);
478 }
479
480 /// Returns the synchronization scope ID of this fence instruction.
481 SyncScope::ID getSyncScopeID() const {
482 return SSID;
483 }
484
485 /// Sets the synchronization scope ID of this fence instruction.
486 void setSyncScopeID(SyncScope::ID SSID) {
487 this->SSID = SSID;
488 }
489
490 // Methods for support type inquiry through isa, cast, and dyn_cast:
491 static bool classof(const Instruction *I) {
492 return I->getOpcode() == Instruction::Fence;
493 }
494 static bool classof(const Value *V) {
495 return isa<Instruction>(V) && classof(cast<Instruction>(V));
496 }
497
498private:
499 // Shadow Instruction::setInstructionSubclassData with a private forwarding
500 // method so that subclasses cannot accidentally use it.
501 template <typename Bitfield>
502 void setSubclassData(typename Bitfield::Type Value) {
503 Instruction::setSubclassData<Bitfield>(Value);
504 }
505
506 /// The synchronization scope ID of this fence instruction. Not quite enough
507 /// room in SubClassData for everything, so synchronization scope ID gets its
508 /// own field.
509 SyncScope::ID SSID;
510};
511
512//===----------------------------------------------------------------------===//
513// AtomicCmpXchgInst Class
514//===----------------------------------------------------------------------===//
515
516/// An instruction that atomically checks whether a
517/// specified value is in a memory location, and, if it is, stores a new value
518/// there. The value returned by this instruction is a pair containing the
519/// original value as first element, and an i1 indicating success (true) or
520/// failure (false) as second element.
521///
522class AtomicCmpXchgInst : public Instruction {
523 void Init(Value *Ptr, Value *Cmp, Value *NewVal, Align Align,
524 AtomicOrdering SuccessOrdering, AtomicOrdering FailureOrdering,
525 SyncScope::ID SSID);
526
527 template <unsigned Offset>
528 using AtomicOrderingBitfieldElement =
529 typename Bitfield::Element<AtomicOrdering, Offset, 3,
530 AtomicOrdering::LAST>;
531
532protected:
533 // Note: Instruction needs to be a friend here to call cloneImpl.
534 friend class Instruction;
535
536 AtomicCmpXchgInst *cloneImpl() const;
537
538public:
539 AtomicCmpXchgInst(Value *Ptr, Value *Cmp, Value *NewVal, Align Alignment,
540 AtomicOrdering SuccessOrdering,
541 AtomicOrdering FailureOrdering, SyncScope::ID SSID,
542 Instruction *InsertBefore = nullptr);
543 AtomicCmpXchgInst(Value *Ptr, Value *Cmp, Value *NewVal, Align Alignment,
544 AtomicOrdering SuccessOrdering,
545 AtomicOrdering FailureOrdering, SyncScope::ID SSID,
546 BasicBlock *InsertAtEnd);
547
548 // allocate space for exactly three operands
549 void *operator new(size_t s) {
550 return User::operator new(s, 3);
551 }
552
553 using VolatileField = BoolBitfieldElementT<0>;
554 using WeakField = BoolBitfieldElementT<VolatileField::NextBit>;
555 using SuccessOrderingField =
556 AtomicOrderingBitfieldElementT<WeakField::NextBit>;
557 using FailureOrderingField =
558 AtomicOrderingBitfieldElementT<SuccessOrderingField::NextBit>;
559 using AlignmentField =
560 AlignmentBitfieldElementT<FailureOrderingField::NextBit>;
561 static_assert(
562 Bitfield::areContiguous<VolatileField, WeakField, SuccessOrderingField,
563 FailureOrderingField, AlignmentField>(),
564 "Bitfields must be contiguous");
565
566 /// Return the alignment of the memory that is being allocated by the
567 /// instruction.
568 Align getAlign() const {
569 return Align(1ULL << getSubclassData<AlignmentField>());
570 }
571
572 void setAlignment(Align Align) {
573 setSubclassData<AlignmentField>(Log2(Align));
574 }
575
576 /// Return true if this is a cmpxchg from a volatile memory
577 /// location.
578 ///
579 bool isVolatile() const { return getSubclassData<VolatileField>(); }
580
581 /// Specify whether this is a volatile cmpxchg.
582 ///
583 void setVolatile(bool V) { setSubclassData<VolatileField>(V); }
584
585 /// Return true if this cmpxchg may spuriously fail.
586 bool isWeak() const { return getSubclassData<WeakField>(); }
587
588 void setWeak(bool IsWeak) { setSubclassData<WeakField>(IsWeak); }
589
590 /// Transparently provide more efficient getOperand methods.
591 DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value)public: inline Value *getOperand(unsigned) const; inline void
setOperand(unsigned, Value*); inline op_iterator op_begin();
inline const_op_iterator op_begin() const; inline op_iterator
op_end(); inline const_op_iterator op_end() const; protected
: template <int> inline Use &Op(); template <int
> inline const Use &Op() const; public: inline unsigned
getNumOperands() const
;
592
593 /// Returns the success ordering constraint of this cmpxchg instruction.
594 AtomicOrdering getSuccessOrdering() const {
595 return getSubclassData<SuccessOrderingField>();
596 }
597
598 /// Sets the success ordering constraint of this cmpxchg instruction.
599 void setSuccessOrdering(AtomicOrdering Ordering) {
600 assert(Ordering != AtomicOrdering::NotAtomic &&((Ordering != AtomicOrdering::NotAtomic && "CmpXchg instructions can only be atomic."
) ? static_cast<void> (0) : __assert_fail ("Ordering != AtomicOrdering::NotAtomic && \"CmpXchg instructions can only be atomic.\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 601, __PRETTY_FUNCTION__))
601 "CmpXchg instructions can only be atomic.")((Ordering != AtomicOrdering::NotAtomic && "CmpXchg instructions can only be atomic."
) ? static_cast<void> (0) : __assert_fail ("Ordering != AtomicOrdering::NotAtomic && \"CmpXchg instructions can only be atomic.\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 601, __PRETTY_FUNCTION__))
;
602 setSubclassData<SuccessOrderingField>(Ordering);
603 }
604
605 /// Returns the failure ordering constraint of this cmpxchg instruction.
606 AtomicOrdering getFailureOrdering() const {
607 return getSubclassData<FailureOrderingField>();
608 }
609
610 /// Sets the failure ordering constraint of this cmpxchg instruction.
611 void setFailureOrdering(AtomicOrdering Ordering) {
612 assert(Ordering != AtomicOrdering::NotAtomic &&((Ordering != AtomicOrdering::NotAtomic && "CmpXchg instructions can only be atomic."
) ? static_cast<void> (0) : __assert_fail ("Ordering != AtomicOrdering::NotAtomic && \"CmpXchg instructions can only be atomic.\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 613, __PRETTY_FUNCTION__))
613 "CmpXchg instructions can only be atomic.")((Ordering != AtomicOrdering::NotAtomic && "CmpXchg instructions can only be atomic."
) ? static_cast<void> (0) : __assert_fail ("Ordering != AtomicOrdering::NotAtomic && \"CmpXchg instructions can only be atomic.\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 613, __PRETTY_FUNCTION__))
;
614 setSubclassData<FailureOrderingField>(Ordering);
615 }
616
617 /// Returns the synchronization scope ID of this cmpxchg instruction.
618 SyncScope::ID getSyncScopeID() const {
619 return SSID;
620 }
621
622 /// Sets the synchronization scope ID of this cmpxchg instruction.
623 void setSyncScopeID(SyncScope::ID SSID) {
624 this->SSID = SSID;
625 }
626
627 Value *getPointerOperand() { return getOperand(0); }
628 const Value *getPointerOperand() const { return getOperand(0); }
629 static unsigned getPointerOperandIndex() { return 0U; }
630
631 Value *getCompareOperand() { return getOperand(1); }
632 const Value *getCompareOperand() const { return getOperand(1); }
633
634 Value *getNewValOperand() { return getOperand(2); }
635 const Value *getNewValOperand() const { return getOperand(2); }
636
637 /// Returns the address space of the pointer operand.
638 unsigned getPointerAddressSpace() const {
639 return getPointerOperand()->getType()->getPointerAddressSpace();
640 }
641
642 /// Returns the strongest permitted ordering on failure, given the
643 /// desired ordering on success.
644 ///
645 /// If the comparison in a cmpxchg operation fails, there is no atomic store
646 /// so release semantics cannot be provided. So this function drops explicit
647 /// Release requests from the AtomicOrdering. A SequentiallyConsistent
648 /// operation would remain SequentiallyConsistent.
649 static AtomicOrdering
650 getStrongestFailureOrdering(AtomicOrdering SuccessOrdering) {
651 switch (SuccessOrdering) {
652 default:
653 llvm_unreachable("invalid cmpxchg success ordering")::llvm::llvm_unreachable_internal("invalid cmpxchg success ordering"
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 653)
;
654 case AtomicOrdering::Release:
655 case AtomicOrdering::Monotonic:
656 return AtomicOrdering::Monotonic;
657 case AtomicOrdering::AcquireRelease:
658 case AtomicOrdering::Acquire:
659 return AtomicOrdering::Acquire;
660 case AtomicOrdering::SequentiallyConsistent:
661 return AtomicOrdering::SequentiallyConsistent;
662 }
663 }
664
665 // Methods for support type inquiry through isa, cast, and dyn_cast:
666 static bool classof(const Instruction *I) {
667 return I->getOpcode() == Instruction::AtomicCmpXchg;
668 }
669 static bool classof(const Value *V) {
670 return isa<Instruction>(V) && classof(cast<Instruction>(V));
671 }
672
673private:
674 // Shadow Instruction::setInstructionSubclassData with a private forwarding
675 // method so that subclasses cannot accidentally use it.
676 template <typename Bitfield>
677 void setSubclassData(typename Bitfield::Type Value) {
678 Instruction::setSubclassData<Bitfield>(Value);
679 }
680
681 /// The synchronization scope ID of this cmpxchg instruction. Not quite
682 /// enough room in SubClassData for everything, so synchronization scope ID
683 /// gets its own field.
684 SyncScope::ID SSID;
685};
686
687template <>
688struct OperandTraits<AtomicCmpXchgInst> :
689 public FixedNumOperandTraits<AtomicCmpXchgInst, 3> {
690};
691
692DEFINE_TRANSPARENT_OPERAND_ACCESSORS(AtomicCmpXchgInst, Value)AtomicCmpXchgInst::op_iterator AtomicCmpXchgInst::op_begin() {
return OperandTraits<AtomicCmpXchgInst>::op_begin(this
); } AtomicCmpXchgInst::const_op_iterator AtomicCmpXchgInst::
op_begin() const { return OperandTraits<AtomicCmpXchgInst>
::op_begin(const_cast<AtomicCmpXchgInst*>(this)); } AtomicCmpXchgInst
::op_iterator AtomicCmpXchgInst::op_end() { return OperandTraits
<AtomicCmpXchgInst>::op_end(this); } AtomicCmpXchgInst::
const_op_iterator AtomicCmpXchgInst::op_end() const { return OperandTraits
<AtomicCmpXchgInst>::op_end(const_cast<AtomicCmpXchgInst
*>(this)); } Value *AtomicCmpXchgInst::getOperand(unsigned
i_nocapture) const { ((i_nocapture < OperandTraits<AtomicCmpXchgInst
>::operands(this) && "getOperand() out of range!")
? static_cast<void> (0) : __assert_fail ("i_nocapture < OperandTraits<AtomicCmpXchgInst>::operands(this) && \"getOperand() out of range!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 692, __PRETTY_FUNCTION__)); return cast_or_null<Value>
( OperandTraits<AtomicCmpXchgInst>::op_begin(const_cast
<AtomicCmpXchgInst*>(this))[i_nocapture].get()); } void
AtomicCmpXchgInst::setOperand(unsigned i_nocapture, Value *Val_nocapture
) { ((i_nocapture < OperandTraits<AtomicCmpXchgInst>
::operands(this) && "setOperand() out of range!") ? static_cast
<void> (0) : __assert_fail ("i_nocapture < OperandTraits<AtomicCmpXchgInst>::operands(this) && \"setOperand() out of range!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 692, __PRETTY_FUNCTION__)); OperandTraits<AtomicCmpXchgInst
>::op_begin(this)[i_nocapture] = Val_nocapture; } unsigned
AtomicCmpXchgInst::getNumOperands() const { return OperandTraits
<AtomicCmpXchgInst>::operands(this); } template <int
Idx_nocapture> Use &AtomicCmpXchgInst::Op() { return this
->OpFrom<Idx_nocapture>(this); } template <int Idx_nocapture
> const Use &AtomicCmpXchgInst::Op() const { return this
->OpFrom<Idx_nocapture>(this); }
693
694//===----------------------------------------------------------------------===//
695// AtomicRMWInst Class
696//===----------------------------------------------------------------------===//
697
698/// an instruction that atomically reads a memory location,
699/// combines it with another value, and then stores the result back. Returns
700/// the old value.
701///
702class AtomicRMWInst : public Instruction {
703protected:
704 // Note: Instruction needs to be a friend here to call cloneImpl.
705 friend class Instruction;
706
707 AtomicRMWInst *cloneImpl() const;
708
709public:
710 /// This enumeration lists the possible modifications atomicrmw can make. In
711 /// the descriptions, 'p' is the pointer to the instruction's memory location,
712 /// 'old' is the initial value of *p, and 'v' is the other value passed to the
713 /// instruction. These instructions always return 'old'.
714 enum BinOp : unsigned {
715 /// *p = v
716 Xchg,
717 /// *p = old + v
718 Add,
719 /// *p = old - v
720 Sub,
721 /// *p = old & v
722 And,
723 /// *p = ~(old & v)
724 Nand,
725 /// *p = old | v
726 Or,
727 /// *p = old ^ v
728 Xor,
729 /// *p = old >signed v ? old : v
730 Max,
731 /// *p = old <signed v ? old : v
732 Min,
733 /// *p = old >unsigned v ? old : v
734 UMax,
735 /// *p = old <unsigned v ? old : v
736 UMin,
737
738 /// *p = old + v
739 FAdd,
740
741 /// *p = old - v
742 FSub,
743
744 FIRST_BINOP = Xchg,
745 LAST_BINOP = FSub,
746 BAD_BINOP
747 };
748
749private:
750 template <unsigned Offset>
751 using AtomicOrderingBitfieldElement =
752 typename Bitfield::Element<AtomicOrdering, Offset, 3,
753 AtomicOrdering::LAST>;
754
755 template <unsigned Offset>
756 using BinOpBitfieldElement =
757 typename Bitfield::Element<BinOp, Offset, 4, BinOp::LAST_BINOP>;
758
759public:
760 AtomicRMWInst(BinOp Operation, Value *Ptr, Value *Val, Align Alignment,
761 AtomicOrdering Ordering, SyncScope::ID SSID,
762 Instruction *InsertBefore = nullptr);
763 AtomicRMWInst(BinOp Operation, Value *Ptr, Value *Val, Align Alignment,
764 AtomicOrdering Ordering, SyncScope::ID SSID,
765 BasicBlock *InsertAtEnd);
766
767 // allocate space for exactly two operands
768 void *operator new(size_t s) {
769 return User::operator new(s, 2);
770 }
771
772 using VolatileField = BoolBitfieldElementT<0>;
773 using AtomicOrderingField =
774 AtomicOrderingBitfieldElementT<VolatileField::NextBit>;
775 using OperationField = BinOpBitfieldElement<AtomicOrderingField::NextBit>;
776 using AlignmentField = AlignmentBitfieldElementT<OperationField::NextBit>;
777 static_assert(Bitfield::areContiguous<VolatileField, AtomicOrderingField,
778 OperationField, AlignmentField>(),
779 "Bitfields must be contiguous");
780
781 BinOp getOperation() const { return getSubclassData<OperationField>(); }
782
783 static StringRef getOperationName(BinOp Op);
784
785 static bool isFPOperation(BinOp Op) {
786 switch (Op) {
787 case AtomicRMWInst::FAdd:
788 case AtomicRMWInst::FSub:
789 return true;
790 default:
791 return false;
792 }
793 }
794
795 void setOperation(BinOp Operation) {
796 setSubclassData<OperationField>(Operation);
797 }
798
799 /// Return the alignment of the memory that is being allocated by the
800 /// instruction.
801 Align getAlign() const {
802 return Align(1ULL << getSubclassData<AlignmentField>());
803 }
804
805 void setAlignment(Align Align) {
806 setSubclassData<AlignmentField>(Log2(Align));
807 }
808
809 /// Return true if this is a RMW on a volatile memory location.
810 ///
811 bool isVolatile() const { return getSubclassData<VolatileField>(); }
812
813 /// Specify whether this is a volatile RMW or not.
814 ///
815 void setVolatile(bool V) { setSubclassData<VolatileField>(V); }
816
817 /// Transparently provide more efficient getOperand methods.
818 DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value)public: inline Value *getOperand(unsigned) const; inline void
setOperand(unsigned, Value*); inline op_iterator op_begin();
inline const_op_iterator op_begin() const; inline op_iterator
op_end(); inline const_op_iterator op_end() const; protected
: template <int> inline Use &Op(); template <int
> inline const Use &Op() const; public: inline unsigned
getNumOperands() const
;
819
820 /// Returns the ordering constraint of this rmw instruction.
821 AtomicOrdering getOrdering() const {
822 return getSubclassData<AtomicOrderingField>();
823 }
824
825 /// Sets the ordering constraint of this rmw instruction.
826 void setOrdering(AtomicOrdering Ordering) {
827 assert(Ordering != AtomicOrdering::NotAtomic &&((Ordering != AtomicOrdering::NotAtomic && "atomicrmw instructions can only be atomic."
) ? static_cast<void> (0) : __assert_fail ("Ordering != AtomicOrdering::NotAtomic && \"atomicrmw instructions can only be atomic.\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 828, __PRETTY_FUNCTION__))
828 "atomicrmw instructions can only be atomic.")((Ordering != AtomicOrdering::NotAtomic && "atomicrmw instructions can only be atomic."
) ? static_cast<void> (0) : __assert_fail ("Ordering != AtomicOrdering::NotAtomic && \"atomicrmw instructions can only be atomic.\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 828, __PRETTY_FUNCTION__))
;
829 setSubclassData<AtomicOrderingField>(Ordering);
830 }
831
832 /// Returns the synchronization scope ID of this rmw instruction.
833 SyncScope::ID getSyncScopeID() const {
834 return SSID;
835 }
836
837 /// Sets the synchronization scope ID of this rmw instruction.
838 void setSyncScopeID(SyncScope::ID SSID) {
839 this->SSID = SSID;
840 }
841
842 Value *getPointerOperand() { return getOperand(0); }
843 const Value *getPointerOperand() const { return getOperand(0); }
844 static unsigned getPointerOperandIndex() { return 0U; }
845
846 Value *getValOperand() { return getOperand(1); }
847 const Value *getValOperand() const { return getOperand(1); }
848
849 /// Returns the address space of the pointer operand.
850 unsigned getPointerAddressSpace() const {
851 return getPointerOperand()->getType()->getPointerAddressSpace();
852 }
853
854 bool isFloatingPointOperation() const {
855 return isFPOperation(getOperation());
856 }
857
858 // Methods for support type inquiry through isa, cast, and dyn_cast:
859 static bool classof(const Instruction *I) {
860 return I->getOpcode() == Instruction::AtomicRMW;
861 }
862 static bool classof(const Value *V) {
863 return isa<Instruction>(V) && classof(cast<Instruction>(V));
864 }
865
866private:
867 void Init(BinOp Operation, Value *Ptr, Value *Val, Align Align,
868 AtomicOrdering Ordering, SyncScope::ID SSID);
869
870 // Shadow Instruction::setInstructionSubclassData with a private forwarding
871 // method so that subclasses cannot accidentally use it.
872 template <typename Bitfield>
873 void setSubclassData(typename Bitfield::Type Value) {
874 Instruction::setSubclassData<Bitfield>(Value);
875 }
876
877 /// The synchronization scope ID of this rmw instruction. Not quite enough
878 /// room in SubClassData for everything, so synchronization scope ID gets its
879 /// own field.
880 SyncScope::ID SSID;
881};
882
883template <>
884struct OperandTraits<AtomicRMWInst>
885 : public FixedNumOperandTraits<AtomicRMWInst,2> {
886};
887
888DEFINE_TRANSPARENT_OPERAND_ACCESSORS(AtomicRMWInst, Value)AtomicRMWInst::op_iterator AtomicRMWInst::op_begin() { return
OperandTraits<AtomicRMWInst>::op_begin(this); } AtomicRMWInst
::const_op_iterator AtomicRMWInst::op_begin() const { return OperandTraits
<AtomicRMWInst>::op_begin(const_cast<AtomicRMWInst*>
(this)); } AtomicRMWInst::op_iterator AtomicRMWInst::op_end()
{ return OperandTraits<AtomicRMWInst>::op_end(this); }
AtomicRMWInst::const_op_iterator AtomicRMWInst::op_end() const
{ return OperandTraits<AtomicRMWInst>::op_end(const_cast
<AtomicRMWInst*>(this)); } Value *AtomicRMWInst::getOperand
(unsigned i_nocapture) const { ((i_nocapture < OperandTraits
<AtomicRMWInst>::operands(this) && "getOperand() out of range!"
) ? static_cast<void> (0) : __assert_fail ("i_nocapture < OperandTraits<AtomicRMWInst>::operands(this) && \"getOperand() out of range!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 888, __PRETTY_FUNCTION__)); return cast_or_null<Value>
( OperandTraits<AtomicRMWInst>::op_begin(const_cast<
AtomicRMWInst*>(this))[i_nocapture].get()); } void AtomicRMWInst
::setOperand(unsigned i_nocapture, Value *Val_nocapture) { ((
i_nocapture < OperandTraits<AtomicRMWInst>::operands
(this) && "setOperand() out of range!") ? static_cast
<void> (0) : __assert_fail ("i_nocapture < OperandTraits<AtomicRMWInst>::operands(this) && \"setOperand() out of range!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 888, __PRETTY_FUNCTION__)); OperandTraits<AtomicRMWInst>
::op_begin(this)[i_nocapture] = Val_nocapture; } unsigned AtomicRMWInst
::getNumOperands() const { return OperandTraits<AtomicRMWInst
>::operands(this); } template <int Idx_nocapture> Use
&AtomicRMWInst::Op() { return this->OpFrom<Idx_nocapture
>(this); } template <int Idx_nocapture> const Use &
AtomicRMWInst::Op() const { return this->OpFrom<Idx_nocapture
>(this); }
889
890//===----------------------------------------------------------------------===//
891// GetElementPtrInst Class
892//===----------------------------------------------------------------------===//
893
894// checkGEPType - Simple wrapper function to give a better assertion failure
895// message on bad indexes for a gep instruction.
896//
897inline Type *checkGEPType(Type *Ty) {
898 assert(Ty && "Invalid GetElementPtrInst indices for type!")((Ty && "Invalid GetElementPtrInst indices for type!"
) ? static_cast<void> (0) : __assert_fail ("Ty && \"Invalid GetElementPtrInst indices for type!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 898, __PRETTY_FUNCTION__))
;
899 return Ty;
900}
901
902/// an instruction for type-safe pointer arithmetic to
903/// access elements of arrays and structs
904///
905class GetElementPtrInst : public Instruction {
906 Type *SourceElementType;
907 Type *ResultElementType;
908
909 GetElementPtrInst(const GetElementPtrInst &GEPI);
910
911 /// Constructors - Create a getelementptr instruction with a base pointer an
912 /// list of indices. The first ctor can optionally insert before an existing
913 /// instruction, the second appends the new instruction to the specified
914 /// BasicBlock.
915 inline GetElementPtrInst(Type *PointeeType, Value *Ptr,
916 ArrayRef<Value *> IdxList, unsigned Values,
917 const Twine &NameStr, Instruction *InsertBefore);
918 inline GetElementPtrInst(Type *PointeeType, Value *Ptr,
919 ArrayRef<Value *> IdxList, unsigned Values,
920 const Twine &NameStr, BasicBlock *InsertAtEnd);
921
922 void init(Value *Ptr, ArrayRef<Value *> IdxList, const Twine &NameStr);
923
924protected:
925 // Note: Instruction needs to be a friend here to call cloneImpl.
926 friend class Instruction;
927
928 GetElementPtrInst *cloneImpl() const;
929
930public:
931 static GetElementPtrInst *Create(Type *PointeeType, Value *Ptr,
932 ArrayRef<Value *> IdxList,
933 const Twine &NameStr = "",
934 Instruction *InsertBefore = nullptr) {
935 unsigned Values = 1 + unsigned(IdxList.size());
936 if (!PointeeType)
937 PointeeType =
938 cast<PointerType>(Ptr->getType()->getScalarType())->getElementType();
939 else
940 assert(((PointeeType == cast<PointerType>(Ptr->getType()->
getScalarType())->getElementType()) ? static_cast<void>
(0) : __assert_fail ("PointeeType == cast<PointerType>(Ptr->getType()->getScalarType())->getElementType()"
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 942, __PRETTY_FUNCTION__))
941 PointeeType ==((PointeeType == cast<PointerType>(Ptr->getType()->
getScalarType())->getElementType()) ? static_cast<void>
(0) : __assert_fail ("PointeeType == cast<PointerType>(Ptr->getType()->getScalarType())->getElementType()"
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 942, __PRETTY_FUNCTION__))
942 cast<PointerType>(Ptr->getType()->getScalarType())->getElementType())((PointeeType == cast<PointerType>(Ptr->getType()->
getScalarType())->getElementType()) ? static_cast<void>
(0) : __assert_fail ("PointeeType == cast<PointerType>(Ptr->getType()->getScalarType())->getElementType()"
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 942, __PRETTY_FUNCTION__))
;
943 return new (Values) GetElementPtrInst(PointeeType, Ptr, IdxList, Values,
944 NameStr, InsertBefore);
945 }
946
947 static GetElementPtrInst *Create(Type *PointeeType, Value *Ptr,
948 ArrayRef<Value *> IdxList,
949 const Twine &NameStr,
950 BasicBlock *InsertAtEnd) {
951 unsigned Values = 1 + unsigned(IdxList.size());
952 if (!PointeeType)
953 PointeeType =
954 cast<PointerType>(Ptr->getType()->getScalarType())->getElementType();
955 else
956 assert(((PointeeType == cast<PointerType>(Ptr->getType()->
getScalarType())->getElementType()) ? static_cast<void>
(0) : __assert_fail ("PointeeType == cast<PointerType>(Ptr->getType()->getScalarType())->getElementType()"
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 958, __PRETTY_FUNCTION__))
957 PointeeType ==((PointeeType == cast<PointerType>(Ptr->getType()->
getScalarType())->getElementType()) ? static_cast<void>
(0) : __assert_fail ("PointeeType == cast<PointerType>(Ptr->getType()->getScalarType())->getElementType()"
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 958, __PRETTY_FUNCTION__))
958 cast<PointerType>(Ptr->getType()->getScalarType())->getElementType())((PointeeType == cast<PointerType>(Ptr->getType()->
getScalarType())->getElementType()) ? static_cast<void>
(0) : __assert_fail ("PointeeType == cast<PointerType>(Ptr->getType()->getScalarType())->getElementType()"
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 958, __PRETTY_FUNCTION__))
;
959 return new (Values) GetElementPtrInst(PointeeType, Ptr, IdxList, Values,
960 NameStr, InsertAtEnd);
961 }
962
963 /// Create an "inbounds" getelementptr. See the documentation for the
964 /// "inbounds" flag in LangRef.html for details.
965 static GetElementPtrInst *CreateInBounds(Value *Ptr,
966 ArrayRef<Value *> IdxList,
967 const Twine &NameStr = "",
968 Instruction *InsertBefore = nullptr){
969 return CreateInBounds(nullptr, Ptr, IdxList, NameStr, InsertBefore);
970 }
971
972 static GetElementPtrInst *
973 CreateInBounds(Type *PointeeType, Value *Ptr, ArrayRef<Value *> IdxList,
974 const Twine &NameStr = "",
975 Instruction *InsertBefore = nullptr) {
976 GetElementPtrInst *GEP =
977 Create(PointeeType, Ptr, IdxList, NameStr, InsertBefore);
978 GEP->setIsInBounds(true);
979 return GEP;
980 }
981
982 static GetElementPtrInst *CreateInBounds(Value *Ptr,
983 ArrayRef<Value *> IdxList,
984 const Twine &NameStr,
985 BasicBlock *InsertAtEnd) {
986 return CreateInBounds(nullptr, Ptr, IdxList, NameStr, InsertAtEnd);
987 }
988
989 static GetElementPtrInst *CreateInBounds(Type *PointeeType, Value *Ptr,
990 ArrayRef<Value *> IdxList,
991 const Twine &NameStr,
992 BasicBlock *InsertAtEnd) {
993 GetElementPtrInst *GEP =
994 Create(PointeeType, Ptr, IdxList, NameStr, InsertAtEnd);
995 GEP->setIsInBounds(true);
996 return GEP;
997 }
998
999 /// Transparently provide more efficient getOperand methods.
1000 DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value)public: inline Value *getOperand(unsigned) const; inline void
setOperand(unsigned, Value*); inline op_iterator op_begin();
inline const_op_iterator op_begin() const; inline op_iterator
op_end(); inline const_op_iterator op_end() const; protected
: template <int> inline Use &Op(); template <int
> inline const Use &Op() const; public: inline unsigned
getNumOperands() const
;
1001
1002 Type *getSourceElementType() const { return SourceElementType; }
1003
1004 void setSourceElementType(Type *Ty) { SourceElementType = Ty; }
1005 void setResultElementType(Type *Ty) { ResultElementType = Ty; }
1006
1007 Type *getResultElementType() const {
1008 assert(ResultElementType ==((ResultElementType == cast<PointerType>(getType()->
getScalarType())->getElementType()) ? static_cast<void>
(0) : __assert_fail ("ResultElementType == cast<PointerType>(getType()->getScalarType())->getElementType()"
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 1009, __PRETTY_FUNCTION__))
1009 cast<PointerType>(getType()->getScalarType())->getElementType())((ResultElementType == cast<PointerType>(getType()->
getScalarType())->getElementType()) ? static_cast<void>
(0) : __assert_fail ("ResultElementType == cast<PointerType>(getType()->getScalarType())->getElementType()"
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 1009, __PRETTY_FUNCTION__))
;
1010 return ResultElementType;
1011 }
1012
1013 /// Returns the address space of this instruction's pointer type.
1014 unsigned getAddressSpace() const {
1015 // Note that this is always the same as the pointer operand's address space
1016 // and that is cheaper to compute, so cheat here.
1017 return getPointerAddressSpace();
1018 }
1019
1020 /// Returns the result type of a getelementptr with the given source
1021 /// element type and indexes.
1022 ///
1023 /// Null is returned if the indices are invalid for the specified
1024 /// source element type.
1025 static Type *getIndexedType(Type *Ty, ArrayRef<Value *> IdxList);
1026 static Type *getIndexedType(Type *Ty, ArrayRef<Constant *> IdxList);
1027 static Type *getIndexedType(Type *Ty, ArrayRef<uint64_t> IdxList);
1028
1029 /// Return the type of the element at the given index of an indexable
1030 /// type. This is equivalent to "getIndexedType(Agg, {Zero, Idx})".
1031 ///
1032 /// Returns null if the type can't be indexed, or the given index is not
1033 /// legal for the given type.
1034 static Type *getTypeAtIndex(Type *Ty, Value *Idx);
1035 static Type *getTypeAtIndex(Type *Ty, uint64_t Idx);
1036
1037 inline op_iterator idx_begin() { return op_begin()+1; }
1038 inline const_op_iterator idx_begin() const { return op_begin()+1; }
1039 inline op_iterator idx_end() { return op_end(); }
1040 inline const_op_iterator idx_end() const { return op_end(); }
1041
1042 inline iterator_range<op_iterator> indices() {
1043 return make_range(idx_begin(), idx_end());
1044 }
1045
1046 inline iterator_range<const_op_iterator> indices() const {
1047 return make_range(idx_begin(), idx_end());
1048 }
1049
1050 Value *getPointerOperand() {
1051 return getOperand(0);
1052 }
1053 const Value *getPointerOperand() const {
1054 return getOperand(0);
1055 }
1056 static unsigned getPointerOperandIndex() {
1057 return 0U; // get index for modifying correct operand.
1058 }
1059
1060 /// Method to return the pointer operand as a
1061 /// PointerType.
1062 Type *getPointerOperandType() const {
1063 return getPointerOperand()->getType();
1064 }
1065
1066 /// Returns the address space of the pointer operand.
1067 unsigned getPointerAddressSpace() const {
1068 return getPointerOperandType()->getPointerAddressSpace();
1069 }
1070
1071 /// Returns the pointer type returned by the GEP
1072 /// instruction, which may be a vector of pointers.
1073 static Type *getGEPReturnType(Type *ElTy, Value *Ptr,
1074 ArrayRef<Value *> IdxList) {
1075 Type *PtrTy = PointerType::get(checkGEPType(getIndexedType(ElTy, IdxList)),
1076 Ptr->getType()->getPointerAddressSpace());
1077 // Vector GEP
1078 if (auto *PtrVTy = dyn_cast<VectorType>(Ptr->getType())) {
1079 ElementCount EltCount = PtrVTy->getElementCount();
1080 return VectorType::get(PtrTy, EltCount);
1081 }
1082 for (Value *Index : IdxList)
1083 if (auto *IndexVTy = dyn_cast<VectorType>(Index->getType())) {
1084 ElementCount EltCount = IndexVTy->getElementCount();
1085 return VectorType::get(PtrTy, EltCount);
1086 }
1087 // Scalar GEP
1088 return PtrTy;
1089 }
1090
1091 unsigned getNumIndices() const { // Note: always non-negative
1092 return getNumOperands() - 1;
1093 }
1094
1095 bool hasIndices() const {
1096 return getNumOperands() > 1;
1097 }
1098
1099 /// Return true if all of the indices of this GEP are
1100 /// zeros. If so, the result pointer and the first operand have the same
1101 /// value, just potentially different types.
1102 bool hasAllZeroIndices() const;
1103
1104 /// Return true if all of the indices of this GEP are
1105 /// constant integers. If so, the result pointer and the first operand have
1106 /// a constant offset between them.
1107 bool hasAllConstantIndices() const;
1108
1109 /// Set or clear the inbounds flag on this GEP instruction.
1110 /// See LangRef.html for the meaning of inbounds on a getelementptr.
1111 void setIsInBounds(bool b = true);
1112
1113 /// Determine whether the GEP has the inbounds flag.
1114 bool isInBounds() const;
1115
1116 /// Accumulate the constant address offset of this GEP if possible.
1117 ///
1118 /// This routine accepts an APInt into which it will accumulate the constant
1119 /// offset of this GEP if the GEP is in fact constant. If the GEP is not
1120 /// all-constant, it returns false and the value of the offset APInt is
1121 /// undefined (it is *not* preserved!). The APInt passed into this routine
1122 /// must be at least as wide as the IntPtr type for the address space of
1123 /// the base GEP pointer.
1124 bool accumulateConstantOffset(const DataLayout &DL, APInt &Offset) const;
1125
1126 // Methods for support type inquiry through isa, cast, and dyn_cast:
1127 static bool classof(const Instruction *I) {
1128 return (I->getOpcode() == Instruction::GetElementPtr);
1129 }
1130 static bool classof(const Value *V) {
1131 return isa<Instruction>(V) && classof(cast<Instruction>(V));
1132 }
1133};
1134
1135template <>
1136struct OperandTraits<GetElementPtrInst> :
1137 public VariadicOperandTraits<GetElementPtrInst, 1> {
1138};
1139
1140GetElementPtrInst::GetElementPtrInst(Type *PointeeType, Value *Ptr,
1141 ArrayRef<Value *> IdxList, unsigned Values,
1142 const Twine &NameStr,
1143 Instruction *InsertBefore)
1144 : Instruction(getGEPReturnType(PointeeType, Ptr, IdxList), GetElementPtr,
1145 OperandTraits<GetElementPtrInst>::op_end(this) - Values,
1146 Values, InsertBefore),
1147 SourceElementType(PointeeType),
1148 ResultElementType(getIndexedType(PointeeType, IdxList)) {
1149 assert(ResultElementType ==((ResultElementType == cast<PointerType>(getType()->
getScalarType())->getElementType()) ? static_cast<void>
(0) : __assert_fail ("ResultElementType == cast<PointerType>(getType()->getScalarType())->getElementType()"
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 1150, __PRETTY_FUNCTION__))
1150 cast<PointerType>(getType()->getScalarType())->getElementType())((ResultElementType == cast<PointerType>(getType()->
getScalarType())->getElementType()) ? static_cast<void>
(0) : __assert_fail ("ResultElementType == cast<PointerType>(getType()->getScalarType())->getElementType()"
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 1150, __PRETTY_FUNCTION__))
;
1151 init(Ptr, IdxList, NameStr);
1152}
1153
1154GetElementPtrInst::GetElementPtrInst(Type *PointeeType, Value *Ptr,
1155 ArrayRef<Value *> IdxList, unsigned Values,
1156 const Twine &NameStr,
1157 BasicBlock *InsertAtEnd)
1158 : Instruction(getGEPReturnType(PointeeType, Ptr, IdxList), GetElementPtr,
1159 OperandTraits<GetElementPtrInst>::op_end(this) - Values,
1160 Values, InsertAtEnd),
1161 SourceElementType(PointeeType),
1162 ResultElementType(getIndexedType(PointeeType, IdxList)) {
1163 assert(ResultElementType ==((ResultElementType == cast<PointerType>(getType()->
getScalarType())->getElementType()) ? static_cast<void>
(0) : __assert_fail ("ResultElementType == cast<PointerType>(getType()->getScalarType())->getElementType()"
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 1164, __PRETTY_FUNCTION__))
1164 cast<PointerType>(getType()->getScalarType())->getElementType())((ResultElementType == cast<PointerType>(getType()->
getScalarType())->getElementType()) ? static_cast<void>
(0) : __assert_fail ("ResultElementType == cast<PointerType>(getType()->getScalarType())->getElementType()"
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 1164, __PRETTY_FUNCTION__))
;
1165 init(Ptr, IdxList, NameStr);
1166}
1167
1168DEFINE_TRANSPARENT_OPERAND_ACCESSORS(GetElementPtrInst, Value)GetElementPtrInst::op_iterator GetElementPtrInst::op_begin() {
return OperandTraits<GetElementPtrInst>::op_begin(this
); } GetElementPtrInst::const_op_iterator GetElementPtrInst::
op_begin() const { return OperandTraits<GetElementPtrInst>
::op_begin(const_cast<GetElementPtrInst*>(this)); } GetElementPtrInst
::op_iterator GetElementPtrInst::op_end() { return OperandTraits
<GetElementPtrInst>::op_end(this); } GetElementPtrInst::
const_op_iterator GetElementPtrInst::op_end() const { return OperandTraits
<GetElementPtrInst>::op_end(const_cast<GetElementPtrInst
*>(this)); } Value *GetElementPtrInst::getOperand(unsigned
i_nocapture) const { ((i_nocapture < OperandTraits<GetElementPtrInst
>::operands(this) && "getOperand() out of range!")
? static_cast<void> (0) : __assert_fail ("i_nocapture < OperandTraits<GetElementPtrInst>::operands(this) && \"getOperand() out of range!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 1168, __PRETTY_FUNCTION__)); return cast_or_null<Value>
( OperandTraits<GetElementPtrInst>::op_begin(const_cast
<GetElementPtrInst*>(this))[i_nocapture].get()); } void
GetElementPtrInst::setOperand(unsigned i_nocapture, Value *Val_nocapture
) { ((i_nocapture < OperandTraits<GetElementPtrInst>
::operands(this) && "setOperand() out of range!") ? static_cast
<void> (0) : __assert_fail ("i_nocapture < OperandTraits<GetElementPtrInst>::operands(this) && \"setOperand() out of range!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 1168, __PRETTY_FUNCTION__)); OperandTraits<GetElementPtrInst
>::op_begin(this)[i_nocapture] = Val_nocapture; } unsigned
GetElementPtrInst::getNumOperands() const { return OperandTraits
<GetElementPtrInst>::operands(this); } template <int
Idx_nocapture> Use &GetElementPtrInst::Op() { return this
->OpFrom<Idx_nocapture>(this); } template <int Idx_nocapture
> const Use &GetElementPtrInst::Op() const { return this
->OpFrom<Idx_nocapture>(this); }
1169
1170//===----------------------------------------------------------------------===//
1171// ICmpInst Class
1172//===----------------------------------------------------------------------===//
1173
1174/// This instruction compares its operands according to the predicate given
1175/// to the constructor. It only operates on integers or pointers. The operands
1176/// must be identical types.
1177/// Represent an integer comparison operator.
1178class ICmpInst: public CmpInst {
1179 void AssertOK() {
1180 assert(isIntPredicate() &&((isIntPredicate() && "Invalid ICmp predicate value")
? static_cast<void> (0) : __assert_fail ("isIntPredicate() && \"Invalid ICmp predicate value\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 1181, __PRETTY_FUNCTION__))
1181 "Invalid ICmp predicate value")((isIntPredicate() && "Invalid ICmp predicate value")
? static_cast<void> (0) : __assert_fail ("isIntPredicate() && \"Invalid ICmp predicate value\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 1181, __PRETTY_FUNCTION__))
;
1182 assert(getOperand(0)->getType() == getOperand(1)->getType() &&((getOperand(0)->getType() == getOperand(1)->getType() &&
"Both operands to ICmp instruction are not of the same type!"
) ? static_cast<void> (0) : __assert_fail ("getOperand(0)->getType() == getOperand(1)->getType() && \"Both operands to ICmp instruction are not of the same type!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 1183, __PRETTY_FUNCTION__))
1183 "Both operands to ICmp instruction are not of the same type!")((getOperand(0)->getType() == getOperand(1)->getType() &&
"Both operands to ICmp instruction are not of the same type!"
) ? static_cast<void> (0) : __assert_fail ("getOperand(0)->getType() == getOperand(1)->getType() && \"Both operands to ICmp instruction are not of the same type!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 1183, __PRETTY_FUNCTION__))
;
1184 // Check that the operands are the right type
1185 assert((getOperand(0)->getType()->isIntOrIntVectorTy() ||(((getOperand(0)->getType()->isIntOrIntVectorTy() || getOperand
(0)->getType()->isPtrOrPtrVectorTy()) && "Invalid operand types for ICmp instruction"
) ? static_cast<void> (0) : __assert_fail ("(getOperand(0)->getType()->isIntOrIntVectorTy() || getOperand(0)->getType()->isPtrOrPtrVectorTy()) && \"Invalid operand types for ICmp instruction\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 1187, __PRETTY_FUNCTION__))
1186 getOperand(0)->getType()->isPtrOrPtrVectorTy()) &&(((getOperand(0)->getType()->isIntOrIntVectorTy() || getOperand
(0)->getType()->isPtrOrPtrVectorTy()) && "Invalid operand types for ICmp instruction"
) ? static_cast<void> (0) : __assert_fail ("(getOperand(0)->getType()->isIntOrIntVectorTy() || getOperand(0)->getType()->isPtrOrPtrVectorTy()) && \"Invalid operand types for ICmp instruction\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 1187, __PRETTY_FUNCTION__))
1187 "Invalid operand types for ICmp instruction")(((getOperand(0)->getType()->isIntOrIntVectorTy() || getOperand
(0)->getType()->isPtrOrPtrVectorTy()) && "Invalid operand types for ICmp instruction"
) ? static_cast<void> (0) : __assert_fail ("(getOperand(0)->getType()->isIntOrIntVectorTy() || getOperand(0)->getType()->isPtrOrPtrVectorTy()) && \"Invalid operand types for ICmp instruction\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 1187, __PRETTY_FUNCTION__))
;
1188 }
1189
1190protected:
1191 // Note: Instruction needs to be a friend here to call cloneImpl.
1192 friend class Instruction;
1193
1194 /// Clone an identical ICmpInst
1195 ICmpInst *cloneImpl() const;
1196
1197public:
1198 /// Constructor with insert-before-instruction semantics.
1199 ICmpInst(
1200 Instruction *InsertBefore, ///< Where to insert
1201 Predicate pred, ///< The predicate to use for the comparison
1202 Value *LHS, ///< The left-hand-side of the expression
1203 Value *RHS, ///< The right-hand-side of the expression
1204 const Twine &NameStr = "" ///< Name of the instruction
1205 ) : CmpInst(makeCmpResultType(LHS->getType()),
1206 Instruction::ICmp, pred, LHS, RHS, NameStr,
1207 InsertBefore) {
1208#ifndef NDEBUG
1209 AssertOK();
1210#endif
1211 }
1212
1213 /// Constructor with insert-at-end semantics.
1214 ICmpInst(
1215 BasicBlock &InsertAtEnd, ///< Block to insert into.
1216 Predicate pred, ///< The predicate to use for the comparison
1217 Value *LHS, ///< The left-hand-side of the expression
1218 Value *RHS, ///< The right-hand-side of the expression
1219 const Twine &NameStr = "" ///< Name of the instruction
1220 ) : CmpInst(makeCmpResultType(LHS->getType()),
1221 Instruction::ICmp, pred, LHS, RHS, NameStr,
1222 &InsertAtEnd) {
1223#ifndef NDEBUG
1224 AssertOK();
1225#endif
1226 }
1227
1228 /// Constructor with no-insertion semantics
1229 ICmpInst(
1230 Predicate pred, ///< The predicate to use for the comparison
1231 Value *LHS, ///< The left-hand-side of the expression
1232 Value *RHS, ///< The right-hand-side of the expression
1233 const Twine &NameStr = "" ///< Name of the instruction
1234 ) : CmpInst(makeCmpResultType(LHS->getType()),
1235 Instruction::ICmp, pred, LHS, RHS, NameStr) {
1236#ifndef NDEBUG
1237 AssertOK();
1238#endif
1239 }
1240
1241 /// For example, EQ->EQ, SLE->SLE, UGT->SGT, etc.
1242 /// @returns the predicate that would be the result if the operand were
1243 /// regarded as signed.
1244 /// Return the signed version of the predicate
1245 Predicate getSignedPredicate() const {
1246 return getSignedPredicate(getPredicate());
1247 }
1248
1249 /// This is a static version that you can use without an instruction.
1250 /// Return the signed version of the predicate.
1251 static Predicate getSignedPredicate(Predicate pred);
1252
1253 /// For example, EQ->EQ, SLE->ULE, UGT->UGT, etc.
1254 /// @returns the predicate that would be the result if the operand were
1255 /// regarded as unsigned.
1256 /// Return the unsigned version of the predicate
1257 Predicate getUnsignedPredicate() const {
1258 return getUnsignedPredicate(getPredicate());
1259 }
1260
1261 /// This is a static version that you can use without an instruction.
1262 /// Return the unsigned version of the predicate.
1263 static Predicate getUnsignedPredicate(Predicate pred);
1264
1265 /// Return true if this predicate is either EQ or NE. This also
1266 /// tests for commutativity.
1267 static bool isEquality(Predicate P) {
1268 return P == ICMP_EQ || P == ICMP_NE;
1269 }
1270
1271 /// Return true if this predicate is either EQ or NE. This also
1272 /// tests for commutativity.
1273 bool isEquality() const {
1274 return isEquality(getPredicate());
1275 }
1276
1277 /// @returns true if the predicate of this ICmpInst is commutative
1278 /// Determine if this relation is commutative.
1279 bool isCommutative() const { return isEquality(); }
1280
1281 /// Return true if the predicate is relational (not EQ or NE).
1282 ///
1283 bool isRelational() const {
1284 return !isEquality();
1285 }
1286
1287 /// Return true if the predicate is relational (not EQ or NE).
1288 ///
1289 static bool isRelational(Predicate P) {
1290 return !isEquality(P);
1291 }
1292
1293 /// Return true if the predicate is SGT or UGT.
1294 ///
1295 static bool isGT(Predicate P) {
1296 return P == ICMP_SGT || P == ICMP_UGT;
1297 }
1298
1299 /// Return true if the predicate is SLT or ULT.
1300 ///
1301 static bool isLT(Predicate P) {
1302 return P == ICMP_SLT || P == ICMP_ULT;
1303 }
1304
1305 /// Return true if the predicate is SGE or UGE.
1306 ///
1307 static bool isGE(Predicate P) {
1308 return P == ICMP_SGE || P == ICMP_UGE;
1309 }
1310
1311 /// Return true if the predicate is SLE or ULE.
1312 ///
1313 static bool isLE(Predicate P) {
1314 return P == ICMP_SLE || P == ICMP_ULE;
1315 }
1316
1317 /// Exchange the two operands to this instruction in such a way that it does
1318 /// not modify the semantics of the instruction. The predicate value may be
1319 /// changed to retain the same result if the predicate is order dependent
1320 /// (e.g. ult).
1321 /// Swap operands and adjust predicate.
1322 void swapOperands() {
1323 setPredicate(getSwappedPredicate());
1324 Op<0>().swap(Op<1>());
1325 }
1326
1327 // Methods for support type inquiry through isa, cast, and dyn_cast:
1328 static bool classof(const Instruction *I) {
1329 return I->getOpcode() == Instruction::ICmp;
1330 }
1331 static bool classof(const Value *V) {
1332 return isa<Instruction>(V) && classof(cast<Instruction>(V));
1333 }
1334};
1335
1336//===----------------------------------------------------------------------===//
1337// FCmpInst Class
1338//===----------------------------------------------------------------------===//
1339
1340/// This instruction compares its operands according to the predicate given
1341/// to the constructor. It only operates on floating point values or packed
1342/// vectors of floating point values. The operands must be identical types.
1343/// Represents a floating point comparison operator.
1344class FCmpInst: public CmpInst {
1345 void AssertOK() {
1346 assert(isFPPredicate() && "Invalid FCmp predicate value")((isFPPredicate() && "Invalid FCmp predicate value") ?
static_cast<void> (0) : __assert_fail ("isFPPredicate() && \"Invalid FCmp predicate value\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 1346, __PRETTY_FUNCTION__))
;
1347 assert(getOperand(0)->getType() == getOperand(1)->getType() &&((getOperand(0)->getType() == getOperand(1)->getType() &&
"Both operands to FCmp instruction are not of the same type!"
) ? static_cast<void> (0) : __assert_fail ("getOperand(0)->getType() == getOperand(1)->getType() && \"Both operands to FCmp instruction are not of the same type!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 1348, __PRETTY_FUNCTION__))
1348 "Both operands to FCmp instruction are not of the same type!")((getOperand(0)->getType() == getOperand(1)->getType() &&
"Both operands to FCmp instruction are not of the same type!"
) ? static_cast<void> (0) : __assert_fail ("getOperand(0)->getType() == getOperand(1)->getType() && \"Both operands to FCmp instruction are not of the same type!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 1348, __PRETTY_FUNCTION__))
;
1349 // Check that the operands are the right type
1350 assert(getOperand(0)->getType()->isFPOrFPVectorTy() &&((getOperand(0)->getType()->isFPOrFPVectorTy() &&
"Invalid operand types for FCmp instruction") ? static_cast<
void> (0) : __assert_fail ("getOperand(0)->getType()->isFPOrFPVectorTy() && \"Invalid operand types for FCmp instruction\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 1351, __PRETTY_FUNCTION__))
1351 "Invalid operand types for FCmp instruction")((getOperand(0)->getType()->isFPOrFPVectorTy() &&
"Invalid operand types for FCmp instruction") ? static_cast<
void> (0) : __assert_fail ("getOperand(0)->getType()->isFPOrFPVectorTy() && \"Invalid operand types for FCmp instruction\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 1351, __PRETTY_FUNCTION__))
;
1352 }
1353
1354protected:
1355 // Note: Instruction needs to be a friend here to call cloneImpl.
1356 friend class Instruction;
1357
1358 /// Clone an identical FCmpInst
1359 FCmpInst *cloneImpl() const;
1360
1361public:
1362 /// Constructor with insert-before-instruction semantics.
1363 FCmpInst(
1364 Instruction *InsertBefore, ///< Where to insert
1365 Predicate pred, ///< The predicate to use for the comparison
1366 Value *LHS, ///< The left-hand-side of the expression
1367 Value *RHS, ///< The right-hand-side of the expression
1368 const Twine &NameStr = "" ///< Name of the instruction
1369 ) : CmpInst(makeCmpResultType(LHS->getType()),
1370 Instruction::FCmp, pred, LHS, RHS, NameStr,
1371 InsertBefore) {
1372 AssertOK();
1373 }
1374
1375 /// Constructor with insert-at-end semantics.
1376 FCmpInst(
1377 BasicBlock &InsertAtEnd, ///< Block to insert into.
1378 Predicate pred, ///< The predicate to use for the comparison
1379 Value *LHS, ///< The left-hand-side of the expression
1380 Value *RHS, ///< The right-hand-side of the expression
1381 const Twine &NameStr = "" ///< Name of the instruction
1382 ) : CmpInst(makeCmpResultType(LHS->getType()),
1383 Instruction::FCmp, pred, LHS, RHS, NameStr,
1384 &InsertAtEnd) {
1385 AssertOK();
1386 }
1387
1388 /// Constructor with no-insertion semantics
1389 FCmpInst(
1390 Predicate Pred, ///< The predicate to use for the comparison
1391 Value *LHS, ///< The left-hand-side of the expression
1392 Value *RHS, ///< The right-hand-side of the expression
1393 const Twine &NameStr = "", ///< Name of the instruction
1394 Instruction *FlagsSource = nullptr
1395 ) : CmpInst(makeCmpResultType(LHS->getType()), Instruction::FCmp, Pred, LHS,
1396 RHS, NameStr, nullptr, FlagsSource) {
1397 AssertOK();
1398 }
1399
1400 /// @returns true if the predicate of this instruction is EQ or NE.
1401 /// Determine if this is an equality predicate.
1402 static bool isEquality(Predicate Pred) {
1403 return Pred == FCMP_OEQ || Pred == FCMP_ONE || Pred == FCMP_UEQ ||
1404 Pred == FCMP_UNE;
1405 }
1406
1407 /// @returns true if the predicate of this instruction is EQ or NE.
1408 /// Determine if this is an equality predicate.
1409 bool isEquality() const { return isEquality(getPredicate()); }
1410
1411 /// @returns true if the predicate of this instruction is commutative.
1412 /// Determine if this is a commutative predicate.
1413 bool isCommutative() const {
1414 return isEquality() ||
1415 getPredicate() == FCMP_FALSE ||
1416 getPredicate() == FCMP_TRUE ||
1417 getPredicate() == FCMP_ORD ||
1418 getPredicate() == FCMP_UNO;
1419 }
1420
1421 /// @returns true if the predicate is relational (not EQ or NE).
1422 /// Determine if this a relational predicate.
1423 bool isRelational() const { return !isEquality(); }
1424
1425 /// Exchange the two operands to this instruction in such a way that it does
1426 /// not modify the semantics of the instruction. The predicate value may be
1427 /// changed to retain the same result if the predicate is order dependent
1428 /// (e.g. ult).
1429 /// Swap operands and adjust predicate.
1430 void swapOperands() {
1431 setPredicate(getSwappedPredicate());
1432 Op<0>().swap(Op<1>());
1433 }
1434
1435 /// Methods for support type inquiry through isa, cast, and dyn_cast:
1436 static bool classof(const Instruction *I) {
1437 return I->getOpcode() == Instruction::FCmp;
1438 }
1439 static bool classof(const Value *V) {
1440 return isa<Instruction>(V) && classof(cast<Instruction>(V));
1441 }
1442};
1443
1444//===----------------------------------------------------------------------===//
1445/// This class represents a function call, abstracting a target
1446/// machine's calling convention. This class uses low bit of the SubClassData
1447/// field to indicate whether or not this is a tail call. The rest of the bits
1448/// hold the calling convention of the call.
1449///
1450class CallInst : public CallBase {
1451 CallInst(const CallInst &CI);
1452
1453 /// Construct a CallInst given a range of arguments.
1454 /// Construct a CallInst from a range of arguments
1455 inline CallInst(FunctionType *Ty, Value *Func, ArrayRef<Value *> Args,
1456 ArrayRef<OperandBundleDef> Bundles, const Twine &NameStr,
1457 Instruction *InsertBefore);
1458
1459 inline CallInst(FunctionType *Ty, Value *Func, ArrayRef<Value *> Args,
1460 const Twine &NameStr, Instruction *InsertBefore)
1461 : CallInst(Ty, Func, Args, None, NameStr, InsertBefore) {}
1462
1463 /// Construct a CallInst given a range of arguments.
1464 /// Construct a CallInst from a range of arguments
1465 inline CallInst(FunctionType *Ty, Value *Func, ArrayRef<Value *> Args,
1466 ArrayRef<OperandBundleDef> Bundles, const Twine &NameStr,
1467 BasicBlock *InsertAtEnd);
1468
1469 explicit CallInst(FunctionType *Ty, Value *F, const Twine &NameStr,
1470 Instruction *InsertBefore);
1471
1472 CallInst(FunctionType *ty, Value *F, const Twine &NameStr,
1473 BasicBlock *InsertAtEnd);
1474
1475 void init(FunctionType *FTy, Value *Func, ArrayRef<Value *> Args,
1476 ArrayRef<OperandBundleDef> Bundles, const Twine &NameStr);
1477 void init(FunctionType *FTy, Value *Func, const Twine &NameStr);
1478
1479 /// Compute the number of operands to allocate.
1480 static int ComputeNumOperands(int NumArgs, int NumBundleInputs = 0) {
1481 // We need one operand for the called function, plus the input operand
1482 // counts provided.
1483 return 1 + NumArgs + NumBundleInputs;
1484 }
1485
1486protected:
1487 // Note: Instruction needs to be a friend here to call cloneImpl.
1488 friend class Instruction;
1489
1490 CallInst *cloneImpl() const;
1491
1492public:
1493 static CallInst *Create(FunctionType *Ty, Value *F, const Twine &NameStr = "",
1494 Instruction *InsertBefore = nullptr) {
1495 return new (ComputeNumOperands(0)) CallInst(Ty, F, NameStr, InsertBefore);
1496 }
1497
1498 static CallInst *Create(FunctionType *Ty, Value *Func, ArrayRef<Value *> Args,
1499 const Twine &NameStr,
1500 Instruction *InsertBefore = nullptr) {
1501 return new (ComputeNumOperands(Args.size()))
1502 CallInst(Ty, Func, Args, None, NameStr, InsertBefore);
1503 }
1504
1505 static CallInst *Create(FunctionType *Ty, Value *Func, ArrayRef<Value *> Args,
1506 ArrayRef<OperandBundleDef> Bundles = None,
1507 const Twine &NameStr = "",
1508 Instruction *InsertBefore = nullptr) {
1509 const int NumOperands =
1510 ComputeNumOperands(Args.size(), CountBundleInputs(Bundles));
1511 const unsigned DescriptorBytes = Bundles.size() * sizeof(BundleOpInfo);
1512
1513 return new (NumOperands, DescriptorBytes)
1514 CallInst(Ty, Func, Args, Bundles, NameStr, InsertBefore);
1515 }
1516
1517 static CallInst *Create(FunctionType *Ty, Value *F, const Twine &NameStr,
1518 BasicBlock *InsertAtEnd) {
1519 return new (ComputeNumOperands(0)) CallInst(Ty, F, NameStr, InsertAtEnd);
1520 }
1521
1522 static CallInst *Create(FunctionType *Ty, Value *Func, ArrayRef<Value *> Args,
1523 const Twine &NameStr, BasicBlock *InsertAtEnd) {
1524 return new (ComputeNumOperands(Args.size()))
1525 CallInst(Ty, Func, Args, None, NameStr, InsertAtEnd);
1526 }
1527
1528 static CallInst *Create(FunctionType *Ty, Value *Func, ArrayRef<Value *> Args,
1529 ArrayRef<OperandBundleDef> Bundles,
1530 const Twine &NameStr, BasicBlock *InsertAtEnd) {
1531 const int NumOperands =
1532 ComputeNumOperands(Args.size(), CountBundleInputs(Bundles));
1533 const unsigned DescriptorBytes = Bundles.size() * sizeof(BundleOpInfo);
1534
1535 return new (NumOperands, DescriptorBytes)
1536 CallInst(Ty, Func, Args, Bundles, NameStr, InsertAtEnd);
1537 }
1538
1539 static CallInst *Create(FunctionCallee Func, const Twine &NameStr = "",
1540 Instruction *InsertBefore = nullptr) {
1541 return Create(Func.getFunctionType(), Func.getCallee(), NameStr,
1542 InsertBefore);
1543 }
1544
1545 static CallInst *Create(FunctionCallee Func, ArrayRef<Value *> Args,
1546 ArrayRef<OperandBundleDef> Bundles = None,
1547 const Twine &NameStr = "",
1548 Instruction *InsertBefore = nullptr) {
1549 return Create(Func.getFunctionType(), Func.getCallee(), Args, Bundles,
1550 NameStr, InsertBefore);
1551 }
1552
1553 static CallInst *Create(FunctionCallee Func, ArrayRef<Value *> Args,
1554 const Twine &NameStr,
1555 Instruction *InsertBefore = nullptr) {
1556 return Create(Func.getFunctionType(), Func.getCallee(), Args, NameStr,
1557 InsertBefore);
1558 }
1559
1560 static CallInst *Create(FunctionCallee Func, const Twine &NameStr,
1561 BasicBlock *InsertAtEnd) {
1562 return Create(Func.getFunctionType(), Func.getCallee(), NameStr,
1563 InsertAtEnd);
1564 }
1565
1566 static CallInst *Create(FunctionCallee Func, ArrayRef<Value *> Args,
1567 const Twine &NameStr, BasicBlock *InsertAtEnd) {
1568 return Create(Func.getFunctionType(), Func.getCallee(), Args, NameStr,
1569 InsertAtEnd);
1570 }
1571
1572 static CallInst *Create(FunctionCallee Func, ArrayRef<Value *> Args,
1573 ArrayRef<OperandBundleDef> Bundles,
1574 const Twine &NameStr, BasicBlock *InsertAtEnd) {
1575 return Create(Func.getFunctionType(), Func.getCallee(), Args, Bundles,
1576 NameStr, InsertAtEnd);
1577 }
1578
1579 /// Create a clone of \p CI with a different set of operand bundles and
1580 /// insert it before \p InsertPt.
1581 ///
1582 /// The returned call instruction is identical \p CI in every way except that
1583 /// the operand bundles for the new instruction are set to the operand bundles
1584 /// in \p Bundles.
1585 static CallInst *Create(CallInst *CI, ArrayRef<OperandBundleDef> Bundles,
1586 Instruction *InsertPt = nullptr);
1587
1588 /// Create a clone of \p CI with a different set of operand bundles and
1589 /// insert it before \p InsertPt.
1590 ///
1591 /// The returned call instruction is identical \p CI in every way except that
1592 /// the operand bundle for the new instruction is set to the operand bundle
1593 /// in \p Bundle.
1594 static CallInst *CreateWithReplacedBundle(CallInst *CI,
1595 OperandBundleDef Bundle,
1596 Instruction *InsertPt = nullptr);
1597
1598 /// Generate the IR for a call to malloc:
1599 /// 1. Compute the malloc call's argument as the specified type's size,
1600 /// possibly multiplied by the array size if the array size is not
1601 /// constant 1.
1602 /// 2. Call malloc with that argument.
1603 /// 3. Bitcast the result of the malloc call to the specified type.
1604 static Instruction *CreateMalloc(Instruction *InsertBefore, Type *IntPtrTy,
1605 Type *AllocTy, Value *AllocSize,
1606 Value *ArraySize = nullptr,
1607 Function *MallocF = nullptr,
1608 const Twine &Name = "");
1609 static Instruction *CreateMalloc(BasicBlock *InsertAtEnd, Type *IntPtrTy,
1610 Type *AllocTy, Value *AllocSize,
1611 Value *ArraySize = nullptr,
1612 Function *MallocF = nullptr,
1613 const Twine &Name = "");
1614 static Instruction *CreateMalloc(Instruction *InsertBefore, Type *IntPtrTy,
1615 Type *AllocTy, Value *AllocSize,
1616 Value *ArraySize = nullptr,
1617 ArrayRef<OperandBundleDef> Bundles = None,
1618 Function *MallocF = nullptr,
1619 const Twine &Name = "");
1620 static Instruction *CreateMalloc(BasicBlock *InsertAtEnd, Type *IntPtrTy,
1621 Type *AllocTy, Value *AllocSize,
1622 Value *ArraySize = nullptr,
1623 ArrayRef<OperandBundleDef> Bundles = None,
1624 Function *MallocF = nullptr,
1625 const Twine &Name = "");
1626 /// Generate the IR for a call to the builtin free function.
1627 static Instruction *CreateFree(Value *Source, Instruction *InsertBefore);
1628 static Instruction *CreateFree(Value *Source, BasicBlock *InsertAtEnd);
1629 static Instruction *CreateFree(Value *Source,
1630 ArrayRef<OperandBundleDef> Bundles,
1631 Instruction *InsertBefore);
1632 static Instruction *CreateFree(Value *Source,
1633 ArrayRef<OperandBundleDef> Bundles,
1634 BasicBlock *InsertAtEnd);
1635
1636 // Note that 'musttail' implies 'tail'.
1637 enum TailCallKind : unsigned {
1638 TCK_None = 0,
1639 TCK_Tail = 1,
1640 TCK_MustTail = 2,
1641 TCK_NoTail = 3,
1642 TCK_LAST = TCK_NoTail
1643 };
1644
1645 using TailCallKindField = Bitfield::Element<TailCallKind, 0, 2, TCK_LAST>;
1646 static_assert(
1647 Bitfield::areContiguous<TailCallKindField, CallBase::CallingConvField>(),
1648 "Bitfields must be contiguous");
1649
1650 TailCallKind getTailCallKind() const {
1651 return getSubclassData<TailCallKindField>();
1652 }
1653
1654 bool isTailCall() const {
1655 TailCallKind Kind = getTailCallKind();
1656 return Kind == TCK_Tail || Kind == TCK_MustTail;
1657 }
1658
1659 bool isMustTailCall() const { return getTailCallKind() == TCK_MustTail; }
1660
1661 bool isNoTailCall() const { return getTailCallKind() == TCK_NoTail; }
1662
1663 void setTailCallKind(TailCallKind TCK) {
1664 setSubclassData<TailCallKindField>(TCK);
1665 }
1666
1667 void setTailCall(bool IsTc = true) {
1668 setTailCallKind(IsTc ? TCK_Tail : TCK_None);
1669 }
1670
1671 /// Return true if the call can return twice
1672 bool canReturnTwice() const { return hasFnAttr(Attribute::ReturnsTwice); }
1673 void setCanReturnTwice() {
1674 addAttribute(AttributeList::FunctionIndex, Attribute::ReturnsTwice);
1675 }
1676
1677 // Methods for support type inquiry through isa, cast, and dyn_cast:
1678 static bool classof(const Instruction *I) {
1679 return I->getOpcode() == Instruction::Call;
1680 }
1681 static bool classof(const Value *V) {
1682 return isa<Instruction>(V) && classof(cast<Instruction>(V));
1683 }
1684
1685 /// Updates profile metadata by scaling it by \p S / \p T.
1686 void updateProfWeight(uint64_t S, uint64_t T);
1687
1688private:
1689 // Shadow Instruction::setInstructionSubclassData with a private forwarding
1690 // method so that subclasses cannot accidentally use it.
1691 template <typename Bitfield>
1692 void setSubclassData(typename Bitfield::Type Value) {
1693 Instruction::setSubclassData<Bitfield>(Value);
1694 }
1695};
1696
1697CallInst::CallInst(FunctionType *Ty, Value *Func, ArrayRef<Value *> Args,
1698 ArrayRef<OperandBundleDef> Bundles, const Twine &NameStr,
1699 BasicBlock *InsertAtEnd)
1700 : CallBase(Ty->getReturnType(), Instruction::Call,
1701 OperandTraits<CallBase>::op_end(this) -
1702 (Args.size() + CountBundleInputs(Bundles) + 1),
1703 unsigned(Args.size() + CountBundleInputs(Bundles) + 1),
1704 InsertAtEnd) {
1705 init(Ty, Func, Args, Bundles, NameStr);
1706}
1707
1708CallInst::CallInst(FunctionType *Ty, Value *Func, ArrayRef<Value *> Args,
1709 ArrayRef<OperandBundleDef> Bundles, const Twine &NameStr,
1710 Instruction *InsertBefore)
1711 : CallBase(Ty->getReturnType(), Instruction::Call,
1712 OperandTraits<CallBase>::op_end(this) -
1713 (Args.size() + CountBundleInputs(Bundles) + 1),
1714 unsigned(Args.size() + CountBundleInputs(Bundles) + 1),
1715 InsertBefore) {
1716 init(Ty, Func, Args, Bundles, NameStr);
1717}
1718
1719//===----------------------------------------------------------------------===//
1720// SelectInst Class
1721//===----------------------------------------------------------------------===//
1722
1723/// This class represents the LLVM 'select' instruction.
1724///
1725class SelectInst : public Instruction {
1726 SelectInst(Value *C, Value *S1, Value *S2, const Twine &NameStr,
1727 Instruction *InsertBefore)
1728 : Instruction(S1->getType(), Instruction::Select,
1729 &Op<0>(), 3, InsertBefore) {
1730 init(C, S1, S2);
1731 setName(NameStr);
1732 }
1733
1734 SelectInst(Value *C, Value *S1, Value *S2, const Twine &NameStr,
1735 BasicBlock *InsertAtEnd)
1736 : Instruction(S1->getType(), Instruction::Select,
1737 &Op<0>(), 3, InsertAtEnd) {
1738 init(C, S1, S2);
1739 setName(NameStr);
1740 }
1741
1742 void init(Value *C, Value *S1, Value *S2) {
1743 assert(!areInvalidOperands(C, S1, S2) && "Invalid operands for select")((!areInvalidOperands(C, S1, S2) && "Invalid operands for select"
) ? static_cast<void> (0) : __assert_fail ("!areInvalidOperands(C, S1, S2) && \"Invalid operands for select\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 1743, __PRETTY_FUNCTION__))
;
1744 Op<0>() = C;
1745 Op<1>() = S1;
1746 Op<2>() = S2;
1747 }
1748
1749protected:
1750 // Note: Instruction needs to be a friend here to call cloneImpl.
1751 friend class Instruction;
1752
1753 SelectInst *cloneImpl() const;
1754
1755public:
1756 static SelectInst *Create(Value *C, Value *S1, Value *S2,
1757 const Twine &NameStr = "",
1758 Instruction *InsertBefore = nullptr,
1759 Instruction *MDFrom = nullptr) {
1760 SelectInst *Sel = new(3) SelectInst(C, S1, S2, NameStr, InsertBefore);
1761 if (MDFrom)
1762 Sel->copyMetadata(*MDFrom);
1763 return Sel;
1764 }
1765
1766 static SelectInst *Create(Value *C, Value *S1, Value *S2,
1767 const Twine &NameStr,
1768 BasicBlock *InsertAtEnd) {
1769 return new(3) SelectInst(C, S1, S2, NameStr, InsertAtEnd);
1770 }
1771
1772 const Value *getCondition() const { return Op<0>(); }
1773 const Value *getTrueValue() const { return Op<1>(); }
1774 const Value *getFalseValue() const { return Op<2>(); }
1775 Value *getCondition() { return Op<0>(); }
1776 Value *getTrueValue() { return Op<1>(); }
1777 Value *getFalseValue() { return Op<2>(); }
1778
1779 void setCondition(Value *V) { Op<0>() = V; }
1780 void setTrueValue(Value *V) { Op<1>() = V; }
1781 void setFalseValue(Value *V) { Op<2>() = V; }
1782
1783 /// Swap the true and false values of the select instruction.
1784 /// This doesn't swap prof metadata.
1785 void swapValues() { Op<1>().swap(Op<2>()); }
1786
1787 /// Return a string if the specified operands are invalid
1788 /// for a select operation, otherwise return null.
1789 static const char *areInvalidOperands(Value *Cond, Value *True, Value *False);
1790
1791 /// Transparently provide more efficient getOperand methods.
1792 DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value)public: inline Value *getOperand(unsigned) const; inline void
setOperand(unsigned, Value*); inline op_iterator op_begin();
inline const_op_iterator op_begin() const; inline op_iterator
op_end(); inline const_op_iterator op_end() const; protected
: template <int> inline Use &Op(); template <int
> inline const Use &Op() const; public: inline unsigned
getNumOperands() const
;
1793
1794 OtherOps getOpcode() const {
1795 return static_cast<OtherOps>(Instruction::getOpcode());
1796 }
1797
1798 // Methods for support type inquiry through isa, cast, and dyn_cast:
1799 static bool classof(const Instruction *I) {
1800 return I->getOpcode() == Instruction::Select;
1801 }
1802 static bool classof(const Value *V) {
1803 return isa<Instruction>(V) && classof(cast<Instruction>(V));
1804 }
1805};
1806
1807template <>
1808struct OperandTraits<SelectInst> : public FixedNumOperandTraits<SelectInst, 3> {
1809};
1810
1811DEFINE_TRANSPARENT_OPERAND_ACCESSORS(SelectInst, Value)SelectInst::op_iterator SelectInst::op_begin() { return OperandTraits
<SelectInst>::op_begin(this); } SelectInst::const_op_iterator
SelectInst::op_begin() const { return OperandTraits<SelectInst
>::op_begin(const_cast<SelectInst*>(this)); } SelectInst
::op_iterator SelectInst::op_end() { return OperandTraits<
SelectInst>::op_end(this); } SelectInst::const_op_iterator
SelectInst::op_end() const { return OperandTraits<SelectInst
>::op_end(const_cast<SelectInst*>(this)); } Value *SelectInst
::getOperand(unsigned i_nocapture) const { ((i_nocapture <
OperandTraits<SelectInst>::operands(this) && "getOperand() out of range!"
) ? static_cast<void> (0) : __assert_fail ("i_nocapture < OperandTraits<SelectInst>::operands(this) && \"getOperand() out of range!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 1811, __PRETTY_FUNCTION__)); return cast_or_null<Value>
( OperandTraits<SelectInst>::op_begin(const_cast<SelectInst
*>(this))[i_nocapture].get()); } void SelectInst::setOperand
(unsigned i_nocapture, Value *Val_nocapture) { ((i_nocapture <
OperandTraits<SelectInst>::operands(this) && "setOperand() out of range!"
) ? static_cast<void> (0) : __assert_fail ("i_nocapture < OperandTraits<SelectInst>::operands(this) && \"setOperand() out of range!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 1811, __PRETTY_FUNCTION__)); OperandTraits<SelectInst>
::op_begin(this)[i_nocapture] = Val_nocapture; } unsigned SelectInst
::getNumOperands() const { return OperandTraits<SelectInst
>::operands(this); } template <int Idx_nocapture> Use
&SelectInst::Op() { return this->OpFrom<Idx_nocapture
>(this); } template <int Idx_nocapture> const Use &
SelectInst::Op() const { return this->OpFrom<Idx_nocapture
>(this); }
1812
1813//===----------------------------------------------------------------------===//
1814// VAArgInst Class
1815//===----------------------------------------------------------------------===//
1816
1817/// This class represents the va_arg llvm instruction, which returns
1818/// an argument of the specified type given a va_list and increments that list
1819///
1820class VAArgInst : public UnaryInstruction {
1821protected:
1822 // Note: Instruction needs to be a friend here to call cloneImpl.
1823 friend class Instruction;
1824
1825 VAArgInst *cloneImpl() const;
1826
1827public:
1828 VAArgInst(Value *List, Type *Ty, const Twine &NameStr = "",
1829 Instruction *InsertBefore = nullptr)
1830 : UnaryInstruction(Ty, VAArg, List, InsertBefore) {
1831 setName(NameStr);
1832 }
1833
1834 VAArgInst(Value *List, Type *Ty, const Twine &NameStr,
1835 BasicBlock *InsertAtEnd)
1836 : UnaryInstruction(Ty, VAArg, List, InsertAtEnd) {
1837 setName(NameStr);
1838 }
1839
1840 Value *getPointerOperand() { return getOperand(0); }
1841 const Value *getPointerOperand() const { return getOperand(0); }
1842 static unsigned getPointerOperandIndex() { return 0U; }
1843
1844 // Methods for support type inquiry through isa, cast, and dyn_cast:
1845 static bool classof(const Instruction *I) {
1846 return I->getOpcode() == VAArg;
1847 }
1848 static bool classof(const Value *V) {
1849 return isa<Instruction>(V) && classof(cast<Instruction>(V));
1850 }
1851};
1852
1853//===----------------------------------------------------------------------===//
1854// ExtractElementInst Class
1855//===----------------------------------------------------------------------===//
1856
1857/// This instruction extracts a single (scalar)
1858/// element from a VectorType value
1859///
1860class ExtractElementInst : public Instruction {
1861 ExtractElementInst(Value *Vec, Value *Idx, const Twine &NameStr = "",
1862 Instruction *InsertBefore = nullptr);
1863 ExtractElementInst(Value *Vec, Value *Idx, const Twine &NameStr,
1864 BasicBlock *InsertAtEnd);
1865
1866protected:
1867 // Note: Instruction needs to be a friend here to call cloneImpl.
1868 friend class Instruction;
1869
1870 ExtractElementInst *cloneImpl() const;
1871
1872public:
1873 static ExtractElementInst *Create(Value *Vec, Value *Idx,
1874 const Twine &NameStr = "",
1875 Instruction *InsertBefore = nullptr) {
1876 return new(2) ExtractElementInst(Vec, Idx, NameStr, InsertBefore);
1877 }
1878
1879 static ExtractElementInst *Create(Value *Vec, Value *Idx,
1880 const Twine &NameStr,
1881 BasicBlock *InsertAtEnd) {
1882 return new(2) ExtractElementInst(Vec, Idx, NameStr, InsertAtEnd);
1883 }
1884
1885 /// Return true if an extractelement instruction can be
1886 /// formed with the specified operands.
1887 static bool isValidOperands(const Value *Vec, const Value *Idx);
1888
1889 Value *getVectorOperand() { return Op<0>(); }
1890 Value *getIndexOperand() { return Op<1>(); }
1891 const Value *getVectorOperand() const { return Op<0>(); }
1892 const Value *getIndexOperand() const { return Op<1>(); }
1893
1894 VectorType *getVectorOperandType() const {
1895 return cast<VectorType>(getVectorOperand()->getType());
1896 }
1897
1898 /// Transparently provide more efficient getOperand methods.
1899 DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value)public: inline Value *getOperand(unsigned) const; inline void
setOperand(unsigned, Value*); inline op_iterator op_begin();
inline const_op_iterator op_begin() const; inline op_iterator
op_end(); inline const_op_iterator op_end() const; protected
: template <int> inline Use &Op(); template <int
> inline const Use &Op() const; public: inline unsigned
getNumOperands() const
;
1900
1901 // Methods for support type inquiry through isa, cast, and dyn_cast:
1902 static bool classof(const Instruction *I) {
1903 return I->getOpcode() == Instruction::ExtractElement;
1904 }
1905 static bool classof(const Value *V) {
1906 return isa<Instruction>(V) && classof(cast<Instruction>(V));
1907 }
1908};
1909
1910template <>
1911struct OperandTraits<ExtractElementInst> :
1912 public FixedNumOperandTraits<ExtractElementInst, 2> {
1913};
1914
1915DEFINE_TRANSPARENT_OPERAND_ACCESSORS(ExtractElementInst, Value)ExtractElementInst::op_iterator ExtractElementInst::op_begin(
) { return OperandTraits<ExtractElementInst>::op_begin(
this); } ExtractElementInst::const_op_iterator ExtractElementInst
::op_begin() const { return OperandTraits<ExtractElementInst
>::op_begin(const_cast<ExtractElementInst*>(this)); }
ExtractElementInst::op_iterator ExtractElementInst::op_end()
{ return OperandTraits<ExtractElementInst>::op_end(this
); } ExtractElementInst::const_op_iterator ExtractElementInst
::op_end() const { return OperandTraits<ExtractElementInst
>::op_end(const_cast<ExtractElementInst*>(this)); } Value
*ExtractElementInst::getOperand(unsigned i_nocapture) const {
((i_nocapture < OperandTraits<ExtractElementInst>::
operands(this) && "getOperand() out of range!") ? static_cast
<void> (0) : __assert_fail ("i_nocapture < OperandTraits<ExtractElementInst>::operands(this) && \"getOperand() out of range!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 1915, __PRETTY_FUNCTION__)); return cast_or_null<Value>
( OperandTraits<ExtractElementInst>::op_begin(const_cast
<ExtractElementInst*>(this))[i_nocapture].get()); } void
ExtractElementInst::setOperand(unsigned i_nocapture, Value *
Val_nocapture) { ((i_nocapture < OperandTraits<ExtractElementInst
>::operands(this) && "setOperand() out of range!")
? static_cast<void> (0) : __assert_fail ("i_nocapture < OperandTraits<ExtractElementInst>::operands(this) && \"setOperand() out of range!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 1915, __PRETTY_FUNCTION__)); OperandTraits<ExtractElementInst
>::op_begin(this)[i_nocapture] = Val_nocapture; } unsigned
ExtractElementInst::getNumOperands() const { return OperandTraits
<ExtractElementInst>::operands(this); } template <int
Idx_nocapture> Use &ExtractElementInst::Op() { return
this->OpFrom<Idx_nocapture>(this); } template <int
Idx_nocapture> const Use &ExtractElementInst::Op() const
{ return this->OpFrom<Idx_nocapture>(this); }
1916
1917//===----------------------------------------------------------------------===//
1918// InsertElementInst Class
1919//===----------------------------------------------------------------------===//
1920
1921/// This instruction inserts a single (scalar)
1922/// element into a VectorType value
1923///
1924class InsertElementInst : public Instruction {
1925 InsertElementInst(Value *Vec, Value *NewElt, Value *Idx,
1926 const Twine &NameStr = "",
1927 Instruction *InsertBefore = nullptr);
1928 InsertElementInst(Value *Vec, Value *NewElt, Value *Idx, const Twine &NameStr,
1929 BasicBlock *InsertAtEnd);
1930
1931protected:
1932 // Note: Instruction needs to be a friend here to call cloneImpl.
1933 friend class Instruction;
1934
1935 InsertElementInst *cloneImpl() const;
1936
1937public:
1938 static InsertElementInst *Create(Value *Vec, Value *NewElt, Value *Idx,
1939 const Twine &NameStr = "",
1940 Instruction *InsertBefore = nullptr) {
1941 return new(3) InsertElementInst(Vec, NewElt, Idx, NameStr, InsertBefore);
1942 }
1943
1944 static InsertElementInst *Create(Value *Vec, Value *NewElt, Value *Idx,
1945 const Twine &NameStr,
1946 BasicBlock *InsertAtEnd) {
1947 return new(3) InsertElementInst(Vec, NewElt, Idx, NameStr, InsertAtEnd);
1948 }
1949
1950 /// Return true if an insertelement instruction can be
1951 /// formed with the specified operands.
1952 static bool isValidOperands(const Value *Vec, const Value *NewElt,
1953 const Value *Idx);
1954
1955 /// Overload to return most specific vector type.
1956 ///
1957 VectorType *getType() const {
1958 return cast<VectorType>(Instruction::getType());
1959 }
1960
1961 /// Transparently provide more efficient getOperand methods.
1962 DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value)public: inline Value *getOperand(unsigned) const; inline void
setOperand(unsigned, Value*); inline op_iterator op_begin();
inline const_op_iterator op_begin() const; inline op_iterator
op_end(); inline const_op_iterator op_end() const; protected
: template <int> inline Use &Op(); template <int
> inline const Use &Op() const; public: inline unsigned
getNumOperands() const
;
1963
1964 // Methods for support type inquiry through isa, cast, and dyn_cast:
1965 static bool classof(const Instruction *I) {
1966 return I->getOpcode() == Instruction::InsertElement;
1967 }
1968 static bool classof(const Value *V) {
1969 return isa<Instruction>(V) && classof(cast<Instruction>(V));
1970 }
1971};
1972
1973template <>
1974struct OperandTraits<InsertElementInst> :
1975 public FixedNumOperandTraits<InsertElementInst, 3> {
1976};
1977
1978DEFINE_TRANSPARENT_OPERAND_ACCESSORS(InsertElementInst, Value)InsertElementInst::op_iterator InsertElementInst::op_begin() {
return OperandTraits<InsertElementInst>::op_begin(this
); } InsertElementInst::const_op_iterator InsertElementInst::
op_begin() const { return OperandTraits<InsertElementInst>
::op_begin(const_cast<InsertElementInst*>(this)); } InsertElementInst
::op_iterator InsertElementInst::op_end() { return OperandTraits
<InsertElementInst>::op_end(this); } InsertElementInst::
const_op_iterator InsertElementInst::op_end() const { return OperandTraits
<InsertElementInst>::op_end(const_cast<InsertElementInst
*>(this)); } Value *InsertElementInst::getOperand(unsigned
i_nocapture) const { ((i_nocapture < OperandTraits<InsertElementInst
>::operands(this) && "getOperand() out of range!")
? static_cast<void> (0) : __assert_fail ("i_nocapture < OperandTraits<InsertElementInst>::operands(this) && \"getOperand() out of range!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 1978, __PRETTY_FUNCTION__)); return cast_or_null<Value>
( OperandTraits<InsertElementInst>::op_begin(const_cast
<InsertElementInst*>(this))[i_nocapture].get()); } void
InsertElementInst::setOperand(unsigned i_nocapture, Value *Val_nocapture
) { ((i_nocapture < OperandTraits<InsertElementInst>
::operands(this) && "setOperand() out of range!") ? static_cast
<void> (0) : __assert_fail ("i_nocapture < OperandTraits<InsertElementInst>::operands(this) && \"setOperand() out of range!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 1978, __PRETTY_FUNCTION__)); OperandTraits<InsertElementInst
>::op_begin(this)[i_nocapture] = Val_nocapture; } unsigned
InsertElementInst::getNumOperands() const { return OperandTraits
<InsertElementInst>::operands(this); } template <int
Idx_nocapture> Use &InsertElementInst::Op() { return this
->OpFrom<Idx_nocapture>(this); } template <int Idx_nocapture
> const Use &InsertElementInst::Op() const { return this
->OpFrom<Idx_nocapture>(this); }
1979
1980//===----------------------------------------------------------------------===//
1981// ShuffleVectorInst Class
1982//===----------------------------------------------------------------------===//
1983
1984constexpr int UndefMaskElem = -1;
1985
1986/// This instruction constructs a fixed permutation of two
1987/// input vectors.
1988///
1989/// For each element of the result vector, the shuffle mask selects an element
1990/// from one of the input vectors to copy to the result. Non-negative elements
1991/// in the mask represent an index into the concatenated pair of input vectors.
1992/// UndefMaskElem (-1) specifies that the result element is undefined.
1993///
1994/// For scalable vectors, all the elements of the mask must be 0 or -1. This
1995/// requirement may be relaxed in the future.
1996class ShuffleVectorInst : public Instruction {
1997 SmallVector<int, 4> ShuffleMask;
1998 Constant *ShuffleMaskForBitcode;
1999
2000protected:
2001 // Note: Instruction needs to be a friend here to call cloneImpl.
2002 friend class Instruction;
2003
2004 ShuffleVectorInst *cloneImpl() const;
2005
2006public:
2007 ShuffleVectorInst(Value *V1, Value *V2, Value *Mask,
2008 const Twine &NameStr = "",
2009 Instruction *InsertBefor = nullptr);
2010 ShuffleVectorInst(Value *V1, Value *V2, Value *Mask,
2011 const Twine &NameStr, BasicBlock *InsertAtEnd);
2012 ShuffleVectorInst(Value *V1, Value *V2, ArrayRef<int> Mask,
2013 const Twine &NameStr = "",
2014 Instruction *InsertBefor = nullptr);
2015 ShuffleVectorInst(Value *V1, Value *V2, ArrayRef<int> Mask,
2016 const Twine &NameStr, BasicBlock *InsertAtEnd);
2017
2018 void *operator new(size_t s) { return User::operator new(s, 2); }
2019
2020 /// Swap the operands and adjust the mask to preserve the semantics
2021 /// of the instruction.
2022 void commute();
2023
2024 /// Return true if a shufflevector instruction can be
2025 /// formed with the specified operands.
2026 static bool isValidOperands(const Value *V1, const Value *V2,
2027 const Value *Mask);
2028 static bool isValidOperands(const Value *V1, const Value *V2,
2029 ArrayRef<int> Mask);
2030
2031 /// Overload to return most specific vector type.
2032 ///
2033 VectorType *getType() const {
2034 return cast<VectorType>(Instruction::getType());
2035 }
2036
2037 /// Transparently provide more efficient getOperand methods.
2038 DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value)public: inline Value *getOperand(unsigned) const; inline void
setOperand(unsigned, Value*); inline op_iterator op_begin();
inline const_op_iterator op_begin() const; inline op_iterator
op_end(); inline const_op_iterator op_end() const; protected
: template <int> inline Use &Op(); template <int
> inline const Use &Op() const; public: inline unsigned
getNumOperands() const
;
2039
2040 /// Return the shuffle mask value of this instruction for the given element
2041 /// index. Return UndefMaskElem if the element is undef.
2042 int getMaskValue(unsigned Elt) const { return ShuffleMask[Elt]; }
2043
2044 /// Convert the input shuffle mask operand to a vector of integers. Undefined
2045 /// elements of the mask are returned as UndefMaskElem.
2046 static void getShuffleMask(const Constant *Mask,
2047 SmallVectorImpl<int> &Result);
2048
2049 /// Return the mask for this instruction as a vector of integers. Undefined
2050 /// elements of the mask are returned as UndefMaskElem.
2051 void getShuffleMask(SmallVectorImpl<int> &Result) const {
2052 Result.assign(ShuffleMask.begin(), ShuffleMask.end());
2053 }
2054
2055 /// Return the mask for this instruction, for use in bitcode.
2056 ///
2057 /// TODO: This is temporary until we decide a new bitcode encoding for
2058 /// shufflevector.
2059 Constant *getShuffleMaskForBitcode() const { return ShuffleMaskForBitcode; }
2060
2061 static Constant *convertShuffleMaskForBitcode(ArrayRef<int> Mask,
2062 Type *ResultTy);
2063
2064 void setShuffleMask(ArrayRef<int> Mask);
2065
2066 ArrayRef<int> getShuffleMask() const { return ShuffleMask; }
2067
2068 /// Return true if this shuffle returns a vector with a different number of
2069 /// elements than its source vectors.
2070 /// Examples: shufflevector <4 x n> A, <4 x n> B, <1,2,3>
2071 /// shufflevector <4 x n> A, <4 x n> B, <1,2,3,4,5>
2072 bool changesLength() const {
2073 unsigned NumSourceElts = cast<VectorType>(Op<0>()->getType())
2074 ->getElementCount()
2075 .getKnownMinValue();
2076 unsigned NumMaskElts = ShuffleMask.size();
2077 return NumSourceElts != NumMaskElts;
2078 }
2079
2080 /// Return true if this shuffle returns a vector with a greater number of
2081 /// elements than its source vectors.
2082 /// Example: shufflevector <2 x n> A, <2 x n> B, <1,2,3>
2083 bool increasesLength() const {
2084 unsigned NumSourceElts = cast<VectorType>(Op<0>()->getType())
2085 ->getElementCount()
2086 .getKnownMinValue();
2087 unsigned NumMaskElts = ShuffleMask.size();
2088 return NumSourceElts < NumMaskElts;
2089 }
2090
2091 /// Return true if this shuffle mask chooses elements from exactly one source
2092 /// vector.
2093 /// Example: <7,5,undef,7>
2094 /// This assumes that vector operands are the same length as the mask.
2095 static bool isSingleSourceMask(ArrayRef<int> Mask);
2096 static bool isSingleSourceMask(const Constant *Mask) {
2097 assert(Mask->getType()->isVectorTy() && "Shuffle needs vector constant.")((Mask->getType()->isVectorTy() && "Shuffle needs vector constant."
) ? static_cast<void> (0) : __assert_fail ("Mask->getType()->isVectorTy() && \"Shuffle needs vector constant.\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 2097, __PRETTY_FUNCTION__))
;
2098 SmallVector<int, 16> MaskAsInts;
2099 getShuffleMask(Mask, MaskAsInts);
2100 return isSingleSourceMask(MaskAsInts);
2101 }
2102
2103 /// Return true if this shuffle chooses elements from exactly one source
2104 /// vector without changing the length of that vector.
2105 /// Example: shufflevector <4 x n> A, <4 x n> B, <3,0,undef,3>
2106 /// TODO: Optionally allow length-changing shuffles.
2107 bool isSingleSource() const {
2108 return !changesLength() && isSingleSourceMask(ShuffleMask);
2109 }
2110
2111 /// Return true if this shuffle mask chooses elements from exactly one source
2112 /// vector without lane crossings. A shuffle using this mask is not
2113 /// necessarily a no-op because it may change the number of elements from its
2114 /// input vectors or it may provide demanded bits knowledge via undef lanes.
2115 /// Example: <undef,undef,2,3>
2116 static bool isIdentityMask(ArrayRef<int> Mask);
2117 static bool isIdentityMask(const Constant *Mask) {
2118 assert(Mask->getType()->isVectorTy() && "Shuffle needs vector constant.")((Mask->getType()->isVectorTy() && "Shuffle needs vector constant."
) ? static_cast<void> (0) : __assert_fail ("Mask->getType()->isVectorTy() && \"Shuffle needs vector constant.\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 2118, __PRETTY_FUNCTION__))
;
2119 SmallVector<int, 16> MaskAsInts;
2120 getShuffleMask(Mask, MaskAsInts);
2121 return isIdentityMask(MaskAsInts);
2122 }
2123
2124 /// Return true if this shuffle chooses elements from exactly one source
2125 /// vector without lane crossings and does not change the number of elements
2126 /// from its input vectors.
2127 /// Example: shufflevector <4 x n> A, <4 x n> B, <4,undef,6,undef>
2128 bool isIdentity() const {
2129 return !changesLength() && isIdentityMask(ShuffleMask);
2130 }
2131
2132 /// Return true if this shuffle lengthens exactly one source vector with
2133 /// undefs in the high elements.
2134 bool isIdentityWithPadding() const;
2135
2136 /// Return true if this shuffle extracts the first N elements of exactly one
2137 /// source vector.
2138 bool isIdentityWithExtract() const;
2139
2140 /// Return true if this shuffle concatenates its 2 source vectors. This
2141 /// returns false if either input is undefined. In that case, the shuffle is
2142 /// is better classified as an identity with padding operation.
2143 bool isConcat() const;
2144
2145 /// Return true if this shuffle mask chooses elements from its source vectors
2146 /// without lane crossings. A shuffle using this mask would be
2147 /// equivalent to a vector select with a constant condition operand.
2148 /// Example: <4,1,6,undef>
2149 /// This returns false if the mask does not choose from both input vectors.
2150 /// In that case, the shuffle is better classified as an identity shuffle.
2151 /// This assumes that vector operands are the same length as the mask
2152 /// (a length-changing shuffle can never be equivalent to a vector select).
2153 static bool isSelectMask(ArrayRef<int> Mask);
2154 static bool isSelectMask(const Constant *Mask) {
2155 assert(Mask->getType()->isVectorTy() && "Shuffle needs vector constant.")((Mask->getType()->isVectorTy() && "Shuffle needs vector constant."
) ? static_cast<void> (0) : __assert_fail ("Mask->getType()->isVectorTy() && \"Shuffle needs vector constant.\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 2155, __PRETTY_FUNCTION__))
;
2156 SmallVector<int, 16> MaskAsInts;
2157 getShuffleMask(Mask, MaskAsInts);
2158 return isSelectMask(MaskAsInts);
2159 }
2160
2161 /// Return true if this shuffle chooses elements from its source vectors
2162 /// without lane crossings and all operands have the same number of elements.
2163 /// In other words, this shuffle is equivalent to a vector select with a
2164 /// constant condition operand.
2165 /// Example: shufflevector <4 x n> A, <4 x n> B, <undef,1,6,3>
2166 /// This returns false if the mask does not choose from both input vectors.
2167 /// In that case, the shuffle is better classified as an identity shuffle.
2168 /// TODO: Optionally allow length-changing shuffles.
2169 bool isSelect() const {
2170 return !changesLength() && isSelectMask(ShuffleMask);
2171 }
2172
2173 /// Return true if this shuffle mask swaps the order of elements from exactly
2174 /// one source vector.
2175 /// Example: <7,6,undef,4>
2176 /// This assumes that vector operands are the same length as the mask.
2177 static bool isReverseMask(ArrayRef<int> Mask);
2178 static bool isReverseMask(const Constant *Mask) {
2179 assert(Mask->getType()->isVectorTy() && "Shuffle needs vector constant.")((Mask->getType()->isVectorTy() && "Shuffle needs vector constant."
) ? static_cast<void> (0) : __assert_fail ("Mask->getType()->isVectorTy() && \"Shuffle needs vector constant.\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 2179, __PRETTY_FUNCTION__))
;
2180 SmallVector<int, 16> MaskAsInts;
2181 getShuffleMask(Mask, MaskAsInts);
2182 return isReverseMask(MaskAsInts);
2183 }
2184
2185 /// Return true if this shuffle swaps the order of elements from exactly
2186 /// one source vector.
2187 /// Example: shufflevector <4 x n> A, <4 x n> B, <3,undef,1,undef>
2188 /// TODO: Optionally allow length-changing shuffles.
2189 bool isReverse() const {
2190 return !changesLength() && isReverseMask(ShuffleMask);
2191 }
2192
2193 /// Return true if this shuffle mask chooses all elements with the same value
2194 /// as the first element of exactly one source vector.
2195 /// Example: <4,undef,undef,4>
2196 /// This assumes that vector operands are the same length as the mask.
2197 static bool isZeroEltSplatMask(ArrayRef<int> Mask);
2198 static bool isZeroEltSplatMask(const Constant *Mask) {
2199 assert(Mask->getType()->isVectorTy() && "Shuffle needs vector constant.")((Mask->getType()->isVectorTy() && "Shuffle needs vector constant."
) ? static_cast<void> (0) : __assert_fail ("Mask->getType()->isVectorTy() && \"Shuffle needs vector constant.\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 2199, __PRETTY_FUNCTION__))
;
2200 SmallVector<int, 16> MaskAsInts;
2201 getShuffleMask(Mask, MaskAsInts);
2202 return isZeroEltSplatMask(MaskAsInts);
2203 }
2204
2205 /// Return true if all elements of this shuffle are the same value as the
2206 /// first element of exactly one source vector without changing the length
2207 /// of that vector.
2208 /// Example: shufflevector <4 x n> A, <4 x n> B, <undef,0,undef,0>
2209 /// TODO: Optionally allow length-changing shuffles.
2210 /// TODO: Optionally allow splats from other elements.
2211 bool isZeroEltSplat() const {
2212 return !changesLength() && isZeroEltSplatMask(ShuffleMask);
2213 }
2214
2215 /// Return true if this shuffle mask is a transpose mask.
2216 /// Transpose vector masks transpose a 2xn matrix. They read corresponding
2217 /// even- or odd-numbered vector elements from two n-dimensional source
2218 /// vectors and write each result into consecutive elements of an
2219 /// n-dimensional destination vector. Two shuffles are necessary to complete
2220 /// the transpose, one for the even elements and another for the odd elements.
2221 /// This description closely follows how the TRN1 and TRN2 AArch64
2222 /// instructions operate.
2223 ///
2224 /// For example, a simple 2x2 matrix can be transposed with:
2225 ///
2226 /// ; Original matrix
2227 /// m0 = < a, b >
2228 /// m1 = < c, d >
2229 ///
2230 /// ; Transposed matrix
2231 /// t0 = < a, c > = shufflevector m0, m1, < 0, 2 >
2232 /// t1 = < b, d > = shufflevector m0, m1, < 1, 3 >
2233 ///
2234 /// For matrices having greater than n columns, the resulting nx2 transposed
2235 /// matrix is stored in two result vectors such that one vector contains
2236 /// interleaved elements from all the even-numbered rows and the other vector
2237 /// contains interleaved elements from all the odd-numbered rows. For example,
2238 /// a 2x4 matrix can be transposed with:
2239 ///
2240 /// ; Original matrix
2241 /// m0 = < a, b, c, d >
2242 /// m1 = < e, f, g, h >
2243 ///
2244 /// ; Transposed matrix
2245 /// t0 = < a, e, c, g > = shufflevector m0, m1 < 0, 4, 2, 6 >
2246 /// t1 = < b, f, d, h > = shufflevector m0, m1 < 1, 5, 3, 7 >
2247 static bool isTransposeMask(ArrayRef<int> Mask);
2248 static bool isTransposeMask(const Constant *Mask) {
2249 assert(Mask->getType()->isVectorTy() && "Shuffle needs vector constant.")((Mask->getType()->isVectorTy() && "Shuffle needs vector constant."
) ? static_cast<void> (0) : __assert_fail ("Mask->getType()->isVectorTy() && \"Shuffle needs vector constant.\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 2249, __PRETTY_FUNCTION__))
;
2250 SmallVector<int, 16> MaskAsInts;
2251 getShuffleMask(Mask, MaskAsInts);
2252 return isTransposeMask(MaskAsInts);
2253 }
2254
2255 /// Return true if this shuffle transposes the elements of its inputs without
2256 /// changing the length of the vectors. This operation may also be known as a
2257 /// merge or interleave. See the description for isTransposeMask() for the
2258 /// exact specification.
2259 /// Example: shufflevector <4 x n> A, <4 x n> B, <0,4,2,6>
2260 bool isTranspose() const {
2261 return !changesLength() && isTransposeMask(ShuffleMask);
2262 }
2263
2264 /// Return true if this shuffle mask is an extract subvector mask.
2265 /// A valid extract subvector mask returns a smaller vector from a single
2266 /// source operand. The base extraction index is returned as well.
2267 static bool isExtractSubvectorMask(ArrayRef<int> Mask, int NumSrcElts,
2268 int &Index);
2269 static bool isExtractSubvectorMask(const Constant *Mask, int NumSrcElts,
2270 int &Index) {
2271 assert(Mask->getType()->isVectorTy() && "Shuffle needs vector constant.")((Mask->getType()->isVectorTy() && "Shuffle needs vector constant."
) ? static_cast<void> (0) : __assert_fail ("Mask->getType()->isVectorTy() && \"Shuffle needs vector constant.\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 2271, __PRETTY_FUNCTION__))
;
2272 // Not possible to express a shuffle mask for a scalable vector for this
2273 // case.
2274 if (isa<ScalableVectorType>(Mask->getType()))
2275 return false;
2276 SmallVector<int, 16> MaskAsInts;
2277 getShuffleMask(Mask, MaskAsInts);
2278 return isExtractSubvectorMask(MaskAsInts, NumSrcElts, Index);
2279 }
2280
2281 /// Return true if this shuffle mask is an extract subvector mask.
2282 bool isExtractSubvectorMask(int &Index) const {
2283 // Not possible to express a shuffle mask for a scalable vector for this
2284 // case.
2285 if (isa<ScalableVectorType>(getType()))
2286 return false;
2287
2288 int NumSrcElts =
2289 cast<FixedVectorType>(Op<0>()->getType())->getNumElements();
2290 return isExtractSubvectorMask(ShuffleMask, NumSrcElts, Index);
2291 }
2292
2293 /// Change values in a shuffle permute mask assuming the two vector operands
2294 /// of length InVecNumElts have swapped position.
2295 static void commuteShuffleMask(MutableArrayRef<int> Mask,
2296 unsigned InVecNumElts) {
2297 for (int &Idx : Mask) {
2298 if (Idx == -1)
2299 continue;
2300 Idx = Idx < (int)InVecNumElts ? Idx + InVecNumElts : Idx - InVecNumElts;
2301 assert(Idx >= 0 && Idx < (int)InVecNumElts * 2 &&((Idx >= 0 && Idx < (int)InVecNumElts * 2 &&
"shufflevector mask index out of range") ? static_cast<void
> (0) : __assert_fail ("Idx >= 0 && Idx < (int)InVecNumElts * 2 && \"shufflevector mask index out of range\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 2302, __PRETTY_FUNCTION__))
2302 "shufflevector mask index out of range")((Idx >= 0 && Idx < (int)InVecNumElts * 2 &&
"shufflevector mask index out of range") ? static_cast<void
> (0) : __assert_fail ("Idx >= 0 && Idx < (int)InVecNumElts * 2 && \"shufflevector mask index out of range\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 2302, __PRETTY_FUNCTION__))
;
2303 }
2304 }
2305
2306 // Methods for support type inquiry through isa, cast, and dyn_cast:
2307 static bool classof(const Instruction *I) {
2308 return I->getOpcode() == Instruction::ShuffleVector;
2309 }
2310 static bool classof(const Value *V) {
2311 return isa<Instruction>(V) && classof(cast<Instruction>(V));
2312 }
2313};
2314
2315template <>
2316struct OperandTraits<ShuffleVectorInst>
2317 : public FixedNumOperandTraits<ShuffleVectorInst, 2> {};
2318
2319DEFINE_TRANSPARENT_OPERAND_ACCESSORS(ShuffleVectorInst, Value)ShuffleVectorInst::op_iterator ShuffleVectorInst::op_begin() {
return OperandTraits<ShuffleVectorInst>::op_begin(this
); } ShuffleVectorInst::const_op_iterator ShuffleVectorInst::
op_begin() const { return OperandTraits<ShuffleVectorInst>
::op_begin(const_cast<ShuffleVectorInst*>(this)); } ShuffleVectorInst
::op_iterator ShuffleVectorInst::op_end() { return OperandTraits
<ShuffleVectorInst>::op_end(this); } ShuffleVectorInst::
const_op_iterator ShuffleVectorInst::op_end() const { return OperandTraits
<ShuffleVectorInst>::op_end(const_cast<ShuffleVectorInst
*>(this)); } Value *ShuffleVectorInst::getOperand(unsigned
i_nocapture) const { ((i_nocapture < OperandTraits<ShuffleVectorInst
>::operands(this) && "getOperand() out of range!")
? static_cast<void> (0) : __assert_fail ("i_nocapture < OperandTraits<ShuffleVectorInst>::operands(this) && \"getOperand() out of range!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 2319, __PRETTY_FUNCTION__)); return cast_or_null<Value>
( OperandTraits<ShuffleVectorInst>::op_begin(const_cast
<ShuffleVectorInst*>(this))[i_nocapture].get()); } void
ShuffleVectorInst::setOperand(unsigned i_nocapture, Value *Val_nocapture
) { ((i_nocapture < OperandTraits<ShuffleVectorInst>
::operands(this) && "setOperand() out of range!") ? static_cast
<void> (0) : __assert_fail ("i_nocapture < OperandTraits<ShuffleVectorInst>::operands(this) && \"setOperand() out of range!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 2319, __PRETTY_FUNCTION__)); OperandTraits<ShuffleVectorInst
>::op_begin(this)[i_nocapture] = Val_nocapture; } unsigned
ShuffleVectorInst::getNumOperands() const { return OperandTraits
<ShuffleVectorInst>::operands(this); } template <int
Idx_nocapture> Use &ShuffleVectorInst::Op() { return this
->OpFrom<Idx_nocapture>(this); } template <int Idx_nocapture
> const Use &ShuffleVectorInst::Op() const { return this
->OpFrom<Idx_nocapture>(this); }
2320
2321//===----------------------------------------------------------------------===//
2322// ExtractValueInst Class
2323//===----------------------------------------------------------------------===//
2324
2325/// This instruction extracts a struct member or array
2326/// element value from an aggregate value.
2327///
2328class ExtractValueInst : public UnaryInstruction {
2329 SmallVector<unsigned, 4> Indices;
2330
2331 ExtractValueInst(const ExtractValueInst &EVI);
2332
2333 /// Constructors - Create a extractvalue instruction with a base aggregate
2334 /// value and a list of indices. The first ctor can optionally insert before
2335 /// an existing instruction, the second appends the new instruction to the
2336 /// specified BasicBlock.
2337 inline ExtractValueInst(Value *Agg,
2338 ArrayRef<unsigned> Idxs,
2339 const Twine &NameStr,
2340 Instruction *InsertBefore);
2341 inline ExtractValueInst(Value *Agg,
2342 ArrayRef<unsigned> Idxs,
2343 const Twine &NameStr, BasicBlock *InsertAtEnd);
2344
2345 void init(ArrayRef<unsigned> Idxs, const Twine &NameStr);
2346
2347protected:
2348 // Note: Instruction needs to be a friend here to call cloneImpl.
2349 friend class Instruction;
2350
2351 ExtractValueInst *cloneImpl() const;
2352
2353public:
2354 static ExtractValueInst *Create(Value *Agg,
2355 ArrayRef<unsigned> Idxs,
2356 const Twine &NameStr = "",
2357 Instruction *InsertBefore = nullptr) {
2358 return new
2359 ExtractValueInst(Agg, Idxs, NameStr, InsertBefore);
2360 }
2361
2362 static ExtractValueInst *Create(Value *Agg,
2363 ArrayRef<unsigned> Idxs,
2364 const Twine &NameStr,
2365 BasicBlock *InsertAtEnd) {
2366 return new ExtractValueInst(Agg, Idxs, NameStr, InsertAtEnd);
2367 }
2368
2369 /// Returns the type of the element that would be extracted
2370 /// with an extractvalue instruction with the specified parameters.
2371 ///
2372 /// Null is returned if the indices are invalid for the specified type.
2373 static Type *getIndexedType(Type *Agg, ArrayRef<unsigned> Idxs);
2374
2375 using idx_iterator = const unsigned*;
2376
2377 inline idx_iterator idx_begin() const { return Indices.begin(); }
2378 inline idx_iterator idx_end() const { return Indices.end(); }
2379 inline iterator_range<idx_iterator> indices() const {
2380 return make_range(idx_begin(), idx_end());
2381 }
2382
2383 Value *getAggregateOperand() {
2384 return getOperand(0);
2385 }
2386 const Value *getAggregateOperand() const {
2387 return getOperand(0);
2388 }
2389 static unsigned getAggregateOperandIndex() {
2390 return 0U; // get index for modifying correct operand
2391 }
2392
2393 ArrayRef<unsigned> getIndices() const {
2394 return Indices;
2395 }
2396
2397 unsigned getNumIndices() const {
2398 return (unsigned)Indices.size();
2399 }
2400
2401 bool hasIndices() const {
2402 return true;
2403 }
2404
2405 // Methods for support type inquiry through isa, cast, and dyn_cast:
2406 static bool classof(const Instruction *I) {
2407 return I->getOpcode() == Instruction::ExtractValue;
2408 }
2409 static bool classof(const Value *V) {
2410 return isa<Instruction>(V) && classof(cast<Instruction>(V));
2411 }
2412};
2413
2414ExtractValueInst::ExtractValueInst(Value *Agg,
2415 ArrayRef<unsigned> Idxs,
2416 const Twine &NameStr,
2417 Instruction *InsertBefore)
2418 : UnaryInstruction(checkGEPType(getIndexedType(Agg->getType(), Idxs)),
2419 ExtractValue, Agg, InsertBefore) {
2420 init(Idxs, NameStr);
2421}
2422
2423ExtractValueInst::ExtractValueInst(Value *Agg,
2424 ArrayRef<unsigned> Idxs,
2425 const Twine &NameStr,
2426 BasicBlock *InsertAtEnd)
2427 : UnaryInstruction(checkGEPType(getIndexedType(Agg->getType(), Idxs)),
2428 ExtractValue, Agg, InsertAtEnd) {
2429 init(Idxs, NameStr);
2430}
2431
2432//===----------------------------------------------------------------------===//
2433// InsertValueInst Class
2434//===----------------------------------------------------------------------===//
2435
2436/// This instruction inserts a struct field of array element
2437/// value into an aggregate value.
2438///
2439class InsertValueInst : public Instruction {
2440 SmallVector<unsigned, 4> Indices;
2441
2442 InsertValueInst(const InsertValueInst &IVI);
2443
2444 /// Constructors - Create a insertvalue instruction with a base aggregate
2445 /// value, a value to insert, and a list of indices. The first ctor can
2446 /// optionally insert before an existing instruction, the second appends
2447 /// the new instruction to the specified BasicBlock.
2448 inline InsertValueInst(Value *Agg, Value *Val,
2449 ArrayRef<unsigned> Idxs,
2450 const Twine &NameStr,
2451 Instruction *InsertBefore);
2452 inline InsertValueInst(Value *Agg, Value *Val,
2453 ArrayRef<unsigned> Idxs,
2454 const Twine &NameStr, BasicBlock *InsertAtEnd);
2455
2456 /// Constructors - These two constructors are convenience methods because one
2457 /// and two index insertvalue instructions are so common.
2458 InsertValueInst(Value *Agg, Value *Val, unsigned Idx,
2459 const Twine &NameStr = "",
2460 Instruction *InsertBefore = nullptr);
2461 InsertValueInst(Value *Agg, Value *Val, unsigned Idx, const Twine &NameStr,
2462 BasicBlock *InsertAtEnd);
2463
2464 void init(Value *Agg, Value *Val, ArrayRef<unsigned> Idxs,
2465 const Twine &NameStr);
2466
2467protected:
2468 // Note: Instruction needs to be a friend here to call cloneImpl.
2469 friend class Instruction;
2470
2471 InsertValueInst *cloneImpl() const;
2472
2473public:
2474 // allocate space for exactly two operands
2475 void *operator new(size_t s) {
2476 return User::operator new(s, 2);
2477 }
2478
2479 static InsertValueInst *Create(Value *Agg, Value *Val,
2480 ArrayRef<unsigned> Idxs,
2481 const Twine &NameStr = "",
2482 Instruction *InsertBefore = nullptr) {
2483 return new InsertValueInst(Agg, Val, Idxs, NameStr, InsertBefore);
2484 }
2485
2486 static InsertValueInst *Create(Value *Agg, Value *Val,
2487 ArrayRef<unsigned> Idxs,
2488 const Twine &NameStr,
2489 BasicBlock *InsertAtEnd) {
2490 return new InsertValueInst(Agg, Val, Idxs, NameStr, InsertAtEnd);
2491 }
2492
2493 /// Transparently provide more efficient getOperand methods.
2494 DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value)public: inline Value *getOperand(unsigned) const; inline void
setOperand(unsigned, Value*); inline op_iterator op_begin();
inline const_op_iterator op_begin() const; inline op_iterator
op_end(); inline const_op_iterator op_end() const; protected
: template <int> inline Use &Op(); template <int
> inline const Use &Op() const; public: inline unsigned
getNumOperands() const
;
2495
2496 using idx_iterator = const unsigned*;
2497
2498 inline idx_iterator idx_begin() const { return Indices.begin(); }
2499 inline idx_iterator idx_end() const { return Indices.end(); }
2500 inline iterator_range<idx_iterator> indices() const {
2501 return make_range(idx_begin(), idx_end());
2502 }
2503
2504 Value *getAggregateOperand() {
2505 return getOperand(0);
2506 }
2507 const Value *getAggregateOperand() const {
2508 return getOperand(0);
2509 }
2510 static unsigned getAggregateOperandIndex() {
2511 return 0U; // get index for modifying correct operand
2512 }
2513
2514 Value *getInsertedValueOperand() {
2515 return getOperand(1);
2516 }
2517 const Value *getInsertedValueOperand() const {
2518 return getOperand(1);
2519 }
2520 static unsigned getInsertedValueOperandIndex() {
2521 return 1U; // get index for modifying correct operand
2522 }
2523
2524 ArrayRef<unsigned> getIndices() const {
2525 return Indices;
2526 }
2527
2528 unsigned getNumIndices() const {
2529 return (unsigned)Indices.size();
2530 }
2531
2532 bool hasIndices() const {
2533 return true;
2534 }
2535
2536 // Methods for support type inquiry through isa, cast, and dyn_cast:
2537 static bool classof(const Instruction *I) {
2538 return I->getOpcode() == Instruction::InsertValue;
2539 }
2540 static bool classof(const Value *V) {
2541 return isa<Instruction>(V) && classof(cast<Instruction>(V));
2542 }
2543};
2544
2545template <>
2546struct OperandTraits<InsertValueInst> :
2547 public FixedNumOperandTraits<InsertValueInst, 2> {
2548};
2549
2550InsertValueInst::InsertValueInst(Value *Agg,
2551 Value *Val,
2552 ArrayRef<unsigned> Idxs,
2553 const Twine &NameStr,
2554 Instruction *InsertBefore)
2555 : Instruction(Agg->getType(), InsertValue,
2556 OperandTraits<InsertValueInst>::op_begin(this),
2557 2, InsertBefore) {
2558 init(Agg, Val, Idxs, NameStr);
2559}
2560
2561InsertValueInst::InsertValueInst(Value *Agg,
2562 Value *Val,
2563 ArrayRef<unsigned> Idxs,
2564 const Twine &NameStr,
2565 BasicBlock *InsertAtEnd)
2566 : Instruction(Agg->getType(), InsertValue,
2567 OperandTraits<InsertValueInst>::op_begin(this),
2568 2, InsertAtEnd) {
2569 init(Agg, Val, Idxs, NameStr);
2570}
2571
2572DEFINE_TRANSPARENT_OPERAND_ACCESSORS(InsertValueInst, Value)InsertValueInst::op_iterator InsertValueInst::op_begin() { return
OperandTraits<InsertValueInst>::op_begin(this); } InsertValueInst
::const_op_iterator InsertValueInst::op_begin() const { return
OperandTraits<InsertValueInst>::op_begin(const_cast<
InsertValueInst*>(this)); } InsertValueInst::op_iterator InsertValueInst
::op_end() { return OperandTraits<InsertValueInst>::op_end
(this); } InsertValueInst::const_op_iterator InsertValueInst::
op_end() const { return OperandTraits<InsertValueInst>::
op_end(const_cast<InsertValueInst*>(this)); } Value *InsertValueInst
::getOperand(unsigned i_nocapture) const { ((i_nocapture <
OperandTraits<InsertValueInst>::operands(this) &&
"getOperand() out of range!") ? static_cast<void> (0) :
__assert_fail ("i_nocapture < OperandTraits<InsertValueInst>::operands(this) && \"getOperand() out of range!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 2572, __PRETTY_FUNCTION__)); return cast_or_null<Value>
( OperandTraits<InsertValueInst>::op_begin(const_cast<
InsertValueInst*>(this))[i_nocapture].get()); } void InsertValueInst
::setOperand(unsigned i_nocapture, Value *Val_nocapture) { ((
i_nocapture < OperandTraits<InsertValueInst>::operands
(this) && "setOperand() out of range!") ? static_cast
<void> (0) : __assert_fail ("i_nocapture < OperandTraits<InsertValueInst>::operands(this) && \"setOperand() out of range!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 2572, __PRETTY_FUNCTION__)); OperandTraits<InsertValueInst
>::op_begin(this)[i_nocapture] = Val_nocapture; } unsigned
InsertValueInst::getNumOperands() const { return OperandTraits
<InsertValueInst>::operands(this); } template <int Idx_nocapture
> Use &InsertValueInst::Op() { return this->OpFrom<
Idx_nocapture>(this); } template <int Idx_nocapture>
const Use &InsertValueInst::Op() const { return this->
OpFrom<Idx_nocapture>(this); }
2573
2574//===----------------------------------------------------------------------===//
2575// PHINode Class
2576//===----------------------------------------------------------------------===//
2577
2578// PHINode - The PHINode class is used to represent the magical mystical PHI
2579// node, that can not exist in nature, but can be synthesized in a computer
2580// scientist's overactive imagination.
2581//
2582class PHINode : public Instruction {
2583 /// The number of operands actually allocated. NumOperands is
2584 /// the number actually in use.
2585 unsigned ReservedSpace;
2586
2587 PHINode(const PHINode &PN);
2588
2589 explicit PHINode(Type *Ty, unsigned NumReservedValues,
2590 const Twine &NameStr = "",
2591 Instruction *InsertBefore = nullptr)
2592 : Instruction(Ty, Instruction::PHI, nullptr, 0, InsertBefore),
2593 ReservedSpace(NumReservedValues) {
2594 setName(NameStr);
2595 allocHungoffUses(ReservedSpace);
2596 }
2597
2598 PHINode(Type *Ty, unsigned NumReservedValues, const Twine &NameStr,
2599 BasicBlock *InsertAtEnd)
2600 : Instruction(Ty, Instruction::PHI, nullptr, 0, InsertAtEnd),
2601 ReservedSpace(NumReservedValues) {
2602 setName(NameStr);
2603 allocHungoffUses(ReservedSpace);
2604 }
2605
2606protected:
2607 // Note: Instruction needs to be a friend here to call cloneImpl.
2608 friend class Instruction;
2609
2610 PHINode *cloneImpl() const;
2611
2612 // allocHungoffUses - this is more complicated than the generic
2613 // User::allocHungoffUses, because we have to allocate Uses for the incoming
2614 // values and pointers to the incoming blocks, all in one allocation.
2615 void allocHungoffUses(unsigned N) {
2616 User::allocHungoffUses(N, /* IsPhi */ true);
2617 }
2618
2619public:
2620 /// Constructors - NumReservedValues is a hint for the number of incoming
2621 /// edges that this phi node will have (use 0 if you really have no idea).
2622 static PHINode *Create(Type *Ty, unsigned NumReservedValues,
2623 const Twine &NameStr = "",
2624 Instruction *InsertBefore = nullptr) {
2625 return new PHINode(Ty, NumReservedValues, NameStr, InsertBefore);
2626 }
2627
2628 static PHINode *Create(Type *Ty, unsigned NumReservedValues,
2629 const Twine &NameStr, BasicBlock *InsertAtEnd) {
2630 return new PHINode(Ty, NumReservedValues, NameStr, InsertAtEnd);
2631 }
2632
2633 /// Provide fast operand accessors
2634 DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value)public: inline Value *getOperand(unsigned) const; inline void
setOperand(unsigned, Value*); inline op_iterator op_begin();
inline const_op_iterator op_begin() const; inline op_iterator
op_end(); inline const_op_iterator op_end() const; protected
: template <int> inline Use &Op(); template <int
> inline const Use &Op() const; public: inline unsigned
getNumOperands() const
;
2635
2636 // Block iterator interface. This provides access to the list of incoming
2637 // basic blocks, which parallels the list of incoming values.
2638
2639 using block_iterator = BasicBlock **;
2640 using const_block_iterator = BasicBlock * const *;
2641
2642 block_iterator block_begin() {
2643 return reinterpret_cast<block_iterator>(op_begin() + ReservedSpace);
2644 }
2645
2646 const_block_iterator block_begin() const {
2647 return reinterpret_cast<const_block_iterator>(op_begin() + ReservedSpace);
2648 }
2649
2650 block_iterator block_end() {
2651 return block_begin() + getNumOperands();
2652 }
2653
2654 const_block_iterator block_end() const {
2655 return block_begin() + getNumOperands();
2656 }
2657
2658 iterator_range<block_iterator> blocks() {
2659 return make_range(block_begin(), block_end());
2660 }
2661
2662 iterator_range<const_block_iterator> blocks() const {
2663 return make_range(block_begin(), block_end());
2664 }
2665
2666 op_range incoming_values() { return operands(); }
2667
2668 const_op_range incoming_values() const { return operands(); }
2669
2670 /// Return the number of incoming edges
2671 ///
2672 unsigned getNumIncomingValues() const { return getNumOperands(); }
2673
2674 /// Return incoming value number x
2675 ///
2676 Value *getIncomingValue(unsigned i) const {
2677 return getOperand(i);
2678 }
2679 void setIncomingValue(unsigned i, Value *V) {
2680 assert(V && "PHI node got a null value!")((V && "PHI node got a null value!") ? static_cast<
void> (0) : __assert_fail ("V && \"PHI node got a null value!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 2680, __PRETTY_FUNCTION__))
;
2681 assert(getType() == V->getType() &&((getType() == V->getType() && "All operands to PHI node must be the same type as the PHI node!"
) ? static_cast<void> (0) : __assert_fail ("getType() == V->getType() && \"All operands to PHI node must be the same type as the PHI node!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 2682, __PRETTY_FUNCTION__))
2682 "All operands to PHI node must be the same type as the PHI node!")((getType() == V->getType() && "All operands to PHI node must be the same type as the PHI node!"
) ? static_cast<void> (0) : __assert_fail ("getType() == V->getType() && \"All operands to PHI node must be the same type as the PHI node!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 2682, __PRETTY_FUNCTION__))
;
2683 setOperand(i, V);
2684 }
2685
2686 static unsigned getOperandNumForIncomingValue(unsigned i) {
2687 return i;
2688 }
2689
2690 static unsigned getIncomingValueNumForOperand(unsigned i) {
2691 return i;
2692 }
2693
2694 /// Return incoming basic block number @p i.
2695 ///
2696 BasicBlock *getIncomingBlock(unsigned i) const {
2697 return block_begin()[i];
2698 }
2699
2700 /// Return incoming basic block corresponding
2701 /// to an operand of the PHI.
2702 ///
2703 BasicBlock *getIncomingBlock(const Use &U) const {
2704 assert(this == U.getUser() && "Iterator doesn't point to PHI's Uses?")((this == U.getUser() && "Iterator doesn't point to PHI's Uses?"
) ? static_cast<void> (0) : __assert_fail ("this == U.getUser() && \"Iterator doesn't point to PHI's Uses?\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 2704, __PRETTY_FUNCTION__))
;
2705 return getIncomingBlock(unsigned(&U - op_begin()));
2706 }
2707
2708 /// Return incoming basic block corresponding
2709 /// to value use iterator.
2710 ///
2711 BasicBlock *getIncomingBlock(Value::const_user_iterator I) const {
2712 return getIncomingBlock(I.getUse());
2713 }
2714
2715 void setIncomingBlock(unsigned i, BasicBlock *BB) {
2716 assert(BB && "PHI node got a null basic block!")((BB && "PHI node got a null basic block!") ? static_cast
<void> (0) : __assert_fail ("BB && \"PHI node got a null basic block!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 2716, __PRETTY_FUNCTION__))
;
2717 block_begin()[i] = BB;
2718 }
2719
2720 /// Replace every incoming basic block \p Old to basic block \p New.
2721 void replaceIncomingBlockWith(const BasicBlock *Old, BasicBlock *New) {
2722 assert(New && Old && "PHI node got a null basic block!")((New && Old && "PHI node got a null basic block!"
) ? static_cast<void> (0) : __assert_fail ("New && Old && \"PHI node got a null basic block!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 2722, __PRETTY_FUNCTION__))
;
2723 for (unsigned Op = 0, NumOps = getNumOperands(); Op != NumOps; ++Op)
2724 if (getIncomingBlock(Op) == Old)
2725 setIncomingBlock(Op, New);
2726 }
2727
2728 /// Add an incoming value to the end of the PHI list
2729 ///
2730 void addIncoming(Value *V, BasicBlock *BB) {
2731 if (getNumOperands() == ReservedSpace)
2732 growOperands(); // Get more space!
2733 // Initialize some new operands.
2734 setNumHungOffUseOperands(getNumOperands() + 1);
2735 setIncomingValue(getNumOperands() - 1, V);
2736 setIncomingBlock(getNumOperands() - 1, BB);
2737 }
2738
2739 /// Remove an incoming value. This is useful if a
2740 /// predecessor basic block is deleted. The value removed is returned.
2741 ///
2742 /// If the last incoming value for a PHI node is removed (and DeletePHIIfEmpty
2743 /// is true), the PHI node is destroyed and any uses of it are replaced with
2744 /// dummy values. The only time there should be zero incoming values to a PHI
2745 /// node is when the block is dead, so this strategy is sound.
2746 ///
2747 Value *removeIncomingValue(unsigned Idx, bool DeletePHIIfEmpty = true);
2748
2749 Value *removeIncomingValue(const BasicBlock *BB, bool DeletePHIIfEmpty=true) {
2750 int Idx = getBasicBlockIndex(BB);
2751 assert(Idx >= 0 && "Invalid basic block argument to remove!")((Idx >= 0 && "Invalid basic block argument to remove!"
) ? static_cast<void> (0) : __assert_fail ("Idx >= 0 && \"Invalid basic block argument to remove!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 2751, __PRETTY_FUNCTION__))
;
2752 return removeIncomingValue(Idx, DeletePHIIfEmpty);
2753 }
2754
2755 /// Return the first index of the specified basic
2756 /// block in the value list for this PHI. Returns -1 if no instance.
2757 ///
2758 int getBasicBlockIndex(const BasicBlock *BB) const {
2759 for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
2760 if (block_begin()[i] == BB)
2761 return i;
2762 return -1;
2763 }
2764
2765 Value *getIncomingValueForBlock(const BasicBlock *BB) const {
2766 int Idx = getBasicBlockIndex(BB);
2767 assert(Idx >= 0 && "Invalid basic block argument!")((Idx >= 0 && "Invalid basic block argument!") ? static_cast
<void> (0) : __assert_fail ("Idx >= 0 && \"Invalid basic block argument!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 2767, __PRETTY_FUNCTION__))
;
2768 return getIncomingValue(Idx);
2769 }
2770
2771 /// Set every incoming value(s) for block \p BB to \p V.
2772 void setIncomingValueForBlock(const BasicBlock *BB, Value *V) {
2773 assert(BB && "PHI node got a null basic block!")((BB && "PHI node got a null basic block!") ? static_cast
<void> (0) : __assert_fail ("BB && \"PHI node got a null basic block!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 2773, __PRETTY_FUNCTION__))
;
2774 bool Found = false;
2775 for (unsigned Op = 0, NumOps = getNumOperands(); Op != NumOps; ++Op)
2776 if (getIncomingBlock(Op) == BB) {
2777 Found = true;
2778 setIncomingValue(Op, V);
2779 }
2780 (void)Found;
2781 assert(Found && "Invalid basic block argument to set!")((Found && "Invalid basic block argument to set!") ? static_cast
<void> (0) : __assert_fail ("Found && \"Invalid basic block argument to set!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 2781, __PRETTY_FUNCTION__))
;
2782 }
2783
2784 /// If the specified PHI node always merges together the
2785 /// same value, return the value, otherwise return null.
2786 Value *hasConstantValue() const;
2787
2788 /// Whether the specified PHI node always merges
2789 /// together the same value, assuming undefs are equal to a unique
2790 /// non-undef value.
2791 bool hasConstantOrUndefValue() const;
2792
2793 /// If the PHI node is complete which means all of its parent's predecessors
2794 /// have incoming value in this PHI, return true, otherwise return false.
2795 bool isComplete() const {
2796 return llvm::all_of(predecessors(getParent()),
2797 [this](const BasicBlock *Pred) {
2798 return getBasicBlockIndex(Pred) >= 0;
2799 });
2800 }
2801
2802 /// Methods for support type inquiry through isa, cast, and dyn_cast:
2803 static bool classof(const Instruction *I) {
2804 return I->getOpcode() == Instruction::PHI;
2805 }
2806 static bool classof(const Value *V) {
2807 return isa<Instruction>(V) && classof(cast<Instruction>(V));
2808 }
2809
2810private:
2811 void growOperands();
2812};
2813
2814template <>
2815struct OperandTraits<PHINode> : public HungoffOperandTraits<2> {
2816};
2817
2818DEFINE_TRANSPARENT_OPERAND_ACCESSORS(PHINode, Value)PHINode::op_iterator PHINode::op_begin() { return OperandTraits
<PHINode>::op_begin(this); } PHINode::const_op_iterator
PHINode::op_begin() const { return OperandTraits<PHINode>
::op_begin(const_cast<PHINode*>(this)); } PHINode::op_iterator
PHINode::op_end() { return OperandTraits<PHINode>::op_end
(this); } PHINode::const_op_iterator PHINode::op_end() const {
return OperandTraits<PHINode>::op_end(const_cast<PHINode
*>(this)); } Value *PHINode::getOperand(unsigned i_nocapture
) const { ((i_nocapture < OperandTraits<PHINode>::operands
(this) && "getOperand() out of range!") ? static_cast
<void> (0) : __assert_fail ("i_nocapture < OperandTraits<PHINode>::operands(this) && \"getOperand() out of range!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 2818, __PRETTY_FUNCTION__)); return cast_or_null<Value>
( OperandTraits<PHINode>::op_begin(const_cast<PHINode
*>(this))[i_nocapture].get()); } void PHINode::setOperand(
unsigned i_nocapture, Value *Val_nocapture) { ((i_nocapture <
OperandTraits<PHINode>::operands(this) && "setOperand() out of range!"
) ? static_cast<void> (0) : __assert_fail ("i_nocapture < OperandTraits<PHINode>::operands(this) && \"setOperand() out of range!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 2818, __PRETTY_FUNCTION__)); OperandTraits<PHINode>::
op_begin(this)[i_nocapture] = Val_nocapture; } unsigned PHINode
::getNumOperands() const { return OperandTraits<PHINode>
::operands(this); } template <int Idx_nocapture> Use &
PHINode::Op() { return this->OpFrom<Idx_nocapture>(this
); } template <int Idx_nocapture> const Use &PHINode
::Op() const { return this->OpFrom<Idx_nocapture>(this
); }
2819
2820//===----------------------------------------------------------------------===//
2821// LandingPadInst Class
2822//===----------------------------------------------------------------------===//
2823
2824//===---------------------------------------------------------------------------
2825/// The landingpad instruction holds all of the information
2826/// necessary to generate correct exception handling. The landingpad instruction
2827/// cannot be moved from the top of a landing pad block, which itself is
2828/// accessible only from the 'unwind' edge of an invoke. This uses the
2829/// SubclassData field in Value to store whether or not the landingpad is a
2830/// cleanup.
2831///
2832class LandingPadInst : public Instruction {
2833 using CleanupField = BoolBitfieldElementT<0>;
2834
2835 /// The number of operands actually allocated. NumOperands is
2836 /// the number actually in use.
2837 unsigned ReservedSpace;
2838
2839 LandingPadInst(const LandingPadInst &LP);
2840
2841public:
2842 enum ClauseType { Catch, Filter };
2843
2844private:
2845 explicit LandingPadInst(Type *RetTy, unsigned NumReservedValues,
2846 const Twine &NameStr, Instruction *InsertBefore);
2847 explicit LandingPadInst(Type *RetTy, unsigned NumReservedValues,
2848 const Twine &NameStr, BasicBlock *InsertAtEnd);
2849
2850 // Allocate space for exactly zero operands.
2851 void *operator new(size_t s) {
2852 return User::operator new(s);
2853 }
2854
2855 void growOperands(unsigned Size);
2856 void init(unsigned NumReservedValues, const Twine &NameStr);
2857
2858protected:
2859 // Note: Instruction needs to be a friend here to call cloneImpl.
2860 friend class Instruction;
2861
2862 LandingPadInst *cloneImpl() const;
2863
2864public:
2865 /// Constructors - NumReservedClauses is a hint for the number of incoming
2866 /// clauses that this landingpad will have (use 0 if you really have no idea).
2867 static LandingPadInst *Create(Type *RetTy, unsigned NumReservedClauses,
2868 const Twine &NameStr = "",
2869 Instruction *InsertBefore = nullptr);
2870 static LandingPadInst *Create(Type *RetTy, unsigned NumReservedClauses,
2871 const Twine &NameStr, BasicBlock *InsertAtEnd);
2872
2873 /// Provide fast operand accessors
2874 DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value)public: inline Value *getOperand(unsigned) const; inline void
setOperand(unsigned, Value*); inline op_iterator op_begin();
inline const_op_iterator op_begin() const; inline op_iterator
op_end(); inline const_op_iterator op_end() const; protected
: template <int> inline Use &Op(); template <int
> inline const Use &Op() const; public: inline unsigned
getNumOperands() const
;
2875
2876 /// Return 'true' if this landingpad instruction is a
2877 /// cleanup. I.e., it should be run when unwinding even if its landing pad
2878 /// doesn't catch the exception.
2879 bool isCleanup() const { return getSubclassData<CleanupField>(); }
2880
2881 /// Indicate that this landingpad instruction is a cleanup.
2882 void setCleanup(bool V) { setSubclassData<CleanupField>(V); }
2883
2884 /// Add a catch or filter clause to the landing pad.
2885 void addClause(Constant *ClauseVal);
2886
2887 /// Get the value of the clause at index Idx. Use isCatch/isFilter to
2888 /// determine what type of clause this is.
2889 Constant *getClause(unsigned Idx) const {
2890 return cast<Constant>(getOperandList()[Idx]);
2891 }
2892
2893 /// Return 'true' if the clause and index Idx is a catch clause.
2894 bool isCatch(unsigned Idx) const {
2895 return !isa<ArrayType>(getOperandList()[Idx]->getType());
2896 }
2897
2898 /// Return 'true' if the clause and index Idx is a filter clause.
2899 bool isFilter(unsigned Idx) const {
2900 return isa<ArrayType>(getOperandList()[Idx]->getType());
2901 }
2902
2903 /// Get the number of clauses for this landing pad.
2904 unsigned getNumClauses() const { return getNumOperands(); }
2905
2906 /// Grow the size of the operand list to accommodate the new
2907 /// number of clauses.
2908 void reserveClauses(unsigned Size) { growOperands(Size); }
2909
2910 // Methods for support type inquiry through isa, cast, and dyn_cast:
2911 static bool classof(const Instruction *I) {
2912 return I->getOpcode() == Instruction::LandingPad;
2913 }
2914 static bool classof(const Value *V) {
2915 return isa<Instruction>(V) && classof(cast<Instruction>(V));
2916 }
2917};
2918
2919template <>
2920struct OperandTraits<LandingPadInst> : public HungoffOperandTraits<1> {
2921};
2922
2923DEFINE_TRANSPARENT_OPERAND_ACCESSORS(LandingPadInst, Value)LandingPadInst::op_iterator LandingPadInst::op_begin() { return
OperandTraits<LandingPadInst>::op_begin(this); } LandingPadInst
::const_op_iterator LandingPadInst::op_begin() const { return
OperandTraits<LandingPadInst>::op_begin(const_cast<
LandingPadInst*>(this)); } LandingPadInst::op_iterator LandingPadInst
::op_end() { return OperandTraits<LandingPadInst>::op_end
(this); } LandingPadInst::const_op_iterator LandingPadInst::op_end
() const { return OperandTraits<LandingPadInst>::op_end
(const_cast<LandingPadInst*>(this)); } Value *LandingPadInst
::getOperand(unsigned i_nocapture) const { ((i_nocapture <
OperandTraits<LandingPadInst>::operands(this) &&
"getOperand() out of range!") ? static_cast<void> (0) :
__assert_fail ("i_nocapture < OperandTraits<LandingPadInst>::operands(this) && \"getOperand() out of range!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 2923, __PRETTY_FUNCTION__)); return cast_or_null<Value>
( OperandTraits<LandingPadInst>::op_begin(const_cast<
LandingPadInst*>(this))[i_nocapture].get()); } void LandingPadInst
::setOperand(unsigned i_nocapture, Value *Val_nocapture) { ((
i_nocapture < OperandTraits<LandingPadInst>::operands
(this) && "setOperand() out of range!") ? static_cast
<void> (0) : __assert_fail ("i_nocapture < OperandTraits<LandingPadInst>::operands(this) && \"setOperand() out of range!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 2923, __PRETTY_FUNCTION__)); OperandTraits<LandingPadInst
>::op_begin(this)[i_nocapture] = Val_nocapture; } unsigned
LandingPadInst::getNumOperands() const { return OperandTraits
<LandingPadInst>::operands(this); } template <int Idx_nocapture
> Use &LandingPadInst::Op() { return this->OpFrom<
Idx_nocapture>(this); } template <int Idx_nocapture>
const Use &LandingPadInst::Op() const { return this->
OpFrom<Idx_nocapture>(this); }
2924
2925//===----------------------------------------------------------------------===//
2926// ReturnInst Class
2927//===----------------------------------------------------------------------===//
2928
2929//===---------------------------------------------------------------------------
2930/// Return a value (possibly void), from a function. Execution
2931/// does not continue in this function any longer.
2932///
2933class ReturnInst : public Instruction {
2934 ReturnInst(const ReturnInst &RI);
2935
2936private:
2937 // ReturnInst constructors:
2938 // ReturnInst() - 'ret void' instruction
2939 // ReturnInst( null) - 'ret void' instruction
2940 // ReturnInst(Value* X) - 'ret X' instruction
2941 // ReturnInst( null, Inst *I) - 'ret void' instruction, insert before I
2942 // ReturnInst(Value* X, Inst *I) - 'ret X' instruction, insert before I
2943 // ReturnInst( null, BB *B) - 'ret void' instruction, insert @ end of B
2944 // ReturnInst(Value* X, BB *B) - 'ret X' instruction, insert @ end of B
2945 //
2946 // NOTE: If the Value* passed is of type void then the constructor behaves as
2947 // if it was passed NULL.
2948 explicit ReturnInst(LLVMContext &C, Value *retVal = nullptr,
2949 Instruction *InsertBefore = nullptr);
2950 ReturnInst(LLVMContext &C, Value *retVal, BasicBlock *InsertAtEnd);
2951 explicit ReturnInst(LLVMContext &C, BasicBlock *InsertAtEnd);
2952
2953protected:
2954 // Note: Instruction needs to be a friend here to call cloneImpl.
2955 friend class Instruction;
2956
2957 ReturnInst *cloneImpl() const;
2958
2959public:
2960 static ReturnInst* Create(LLVMContext &C, Value *retVal = nullptr,
2961 Instruction *InsertBefore = nullptr) {
2962 return new(!!retVal) ReturnInst(C, retVal, InsertBefore);
2963 }
2964
2965 static ReturnInst* Create(LLVMContext &C, Value *retVal,
2966 BasicBlock *InsertAtEnd) {
2967 return new(!!retVal) ReturnInst(C, retVal, InsertAtEnd);
2968 }
2969
2970 static ReturnInst* Create(LLVMContext &C, BasicBlock *InsertAtEnd) {
2971 return new(0) ReturnInst(C, InsertAtEnd);
2972 }
2973
2974 /// Provide fast operand accessors
2975 DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value)public: inline Value *getOperand(unsigned) const; inline void
setOperand(unsigned, Value*); inline op_iterator op_begin();
inline const_op_iterator op_begin() const; inline op_iterator
op_end(); inline const_op_iterator op_end() const; protected
: template <int> inline Use &Op(); template <int
> inline const Use &Op() const; public: inline unsigned
getNumOperands() const
;
2976
2977 /// Convenience accessor. Returns null if there is no return value.
2978 Value *getReturnValue() const {
2979 return getNumOperands() != 0 ? getOperand(0) : nullptr;
2980 }
2981
2982 unsigned getNumSuccessors() const { return 0; }
2983
2984 // Methods for support type inquiry through isa, cast, and dyn_cast:
2985 static bool classof(const Instruction *I) {
2986 return (I->getOpcode() == Instruction::Ret);
2987 }
2988 static bool classof(const Value *V) {
2989 return isa<Instruction>(V) && classof(cast<Instruction>(V));
2990 }
2991
2992private:
2993 BasicBlock *getSuccessor(unsigned idx) const {
2994 llvm_unreachable("ReturnInst has no successors!")::llvm::llvm_unreachable_internal("ReturnInst has no successors!"
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 2994)
;
2995 }
2996
2997 void setSuccessor(unsigned idx, BasicBlock *B) {
2998 llvm_unreachable("ReturnInst has no successors!")::llvm::llvm_unreachable_internal("ReturnInst has no successors!"
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 2998)
;
2999 }
3000};
3001
3002template <>
3003struct OperandTraits<ReturnInst> : public VariadicOperandTraits<ReturnInst> {
3004};
3005
3006DEFINE_TRANSPARENT_OPERAND_ACCESSORS(ReturnInst, Value)ReturnInst::op_iterator ReturnInst::op_begin() { return OperandTraits
<ReturnInst>::op_begin(this); } ReturnInst::const_op_iterator
ReturnInst::op_begin() const { return OperandTraits<ReturnInst
>::op_begin(const_cast<ReturnInst*>(this)); } ReturnInst
::op_iterator ReturnInst::op_end() { return OperandTraits<
ReturnInst>::op_end(this); } ReturnInst::const_op_iterator
ReturnInst::op_end() const { return OperandTraits<ReturnInst
>::op_end(const_cast<ReturnInst*>(this)); } Value *ReturnInst
::getOperand(unsigned i_nocapture) const { ((i_nocapture <
OperandTraits<ReturnInst>::operands(this) && "getOperand() out of range!"
) ? static_cast<void> (0) : __assert_fail ("i_nocapture < OperandTraits<ReturnInst>::operands(this) && \"getOperand() out of range!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 3006, __PRETTY_FUNCTION__)); return cast_or_null<Value>
( OperandTraits<ReturnInst>::op_begin(const_cast<ReturnInst
*>(this))[i_nocapture].get()); } void ReturnInst::setOperand
(unsigned i_nocapture, Value *Val_nocapture) { ((i_nocapture <
OperandTraits<ReturnInst>::operands(this) && "setOperand() out of range!"
) ? static_cast<void> (0) : __assert_fail ("i_nocapture < OperandTraits<ReturnInst>::operands(this) && \"setOperand() out of range!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 3006, __PRETTY_FUNCTION__)); OperandTraits<ReturnInst>
::op_begin(this)[i_nocapture] = Val_nocapture; } unsigned ReturnInst
::getNumOperands() const { return OperandTraits<ReturnInst
>::operands(this); } template <int Idx_nocapture> Use
&ReturnInst::Op() { return this->OpFrom<Idx_nocapture
>(this); } template <int Idx_nocapture> const Use &
ReturnInst::Op() const { return this->OpFrom<Idx_nocapture
>(this); }
3007
3008//===----------------------------------------------------------------------===//
3009// BranchInst Class
3010//===----------------------------------------------------------------------===//
3011
3012//===---------------------------------------------------------------------------
3013/// Conditional or Unconditional Branch instruction.
3014///
3015class BranchInst : public Instruction {
3016 /// Ops list - Branches are strange. The operands are ordered:
3017 /// [Cond, FalseDest,] TrueDest. This makes some accessors faster because
3018 /// they don't have to check for cond/uncond branchness. These are mostly
3019 /// accessed relative from op_end().
3020 BranchInst(const BranchInst &BI);
3021 // BranchInst constructors (where {B, T, F} are blocks, and C is a condition):
3022 // BranchInst(BB *B) - 'br B'
3023 // BranchInst(BB* T, BB *F, Value *C) - 'br C, T, F'
3024 // BranchInst(BB* B, Inst *I) - 'br B' insert before I
3025 // BranchInst(BB* T, BB *F, Value *C, Inst *I) - 'br C, T, F', insert before I
3026 // BranchInst(BB* B, BB *I) - 'br B' insert at end
3027 // BranchInst(BB* T, BB *F, Value *C, BB *I) - 'br C, T, F', insert at end
3028 explicit BranchInst(BasicBlock *IfTrue, Instruction *InsertBefore = nullptr);
3029 BranchInst(BasicBlock *IfTrue, BasicBlock *IfFalse, Value *Cond,
3030 Instruction *InsertBefore = nullptr);
3031 BranchInst(BasicBlock *IfTrue, BasicBlock *InsertAtEnd);
3032 BranchInst(BasicBlock *IfTrue, BasicBlock *IfFalse, Value *Cond,
3033 BasicBlock *InsertAtEnd);
3034
3035 void AssertOK();
3036
3037protected:
3038 // Note: Instruction needs to be a friend here to call cloneImpl.
3039 friend class Instruction;
3040
3041 BranchInst *cloneImpl() const;
3042
3043public:
3044 /// Iterator type that casts an operand to a basic block.
3045 ///
3046 /// This only makes sense because the successors are stored as adjacent
3047 /// operands for branch instructions.
3048 struct succ_op_iterator
3049 : iterator_adaptor_base<succ_op_iterator, value_op_iterator,
3050 std::random_access_iterator_tag, BasicBlock *,
3051 ptrdiff_t, BasicBlock *, BasicBlock *> {
3052 explicit succ_op_iterator(value_op_iterator I) : iterator_adaptor_base(I) {}
3053
3054 BasicBlock *operator*() const { return cast<BasicBlock>(*I); }
3055 BasicBlock *operator->() const { return operator*(); }
3056 };
3057
3058 /// The const version of `succ_op_iterator`.
3059 struct const_succ_op_iterator
3060 : iterator_adaptor_base<const_succ_op_iterator, const_value_op_iterator,
3061 std::random_access_iterator_tag,
3062 const BasicBlock *, ptrdiff_t, const BasicBlock *,
3063 const BasicBlock *> {
3064 explicit const_succ_op_iterator(const_value_op_iterator I)
3065 : iterator_adaptor_base(I) {}
3066
3067 const BasicBlock *operator*() const { return cast<BasicBlock>(*I); }
3068 const BasicBlock *operator->() const { return operator*(); }
3069 };
3070
3071 static BranchInst *Create(BasicBlock *IfTrue,
3072 Instruction *InsertBefore = nullptr) {
3073 return new(1) BranchInst(IfTrue, InsertBefore);
3074 }
3075
3076 static BranchInst *Create(BasicBlock *IfTrue, BasicBlock *IfFalse,
3077 Value *Cond, Instruction *InsertBefore = nullptr) {
3078 return new(3) BranchInst(IfTrue, IfFalse, Cond, InsertBefore);
3079 }
3080
3081 static BranchInst *Create(BasicBlock *IfTrue, BasicBlock *InsertAtEnd) {
3082 return new(1) BranchInst(IfTrue, InsertAtEnd);
3083 }
3084
3085 static BranchInst *Create(BasicBlock *IfTrue, BasicBlock *IfFalse,
3086 Value *Cond, BasicBlock *InsertAtEnd) {
3087 return new(3) BranchInst(IfTrue, IfFalse, Cond, InsertAtEnd);
3088 }
3089
3090 /// Transparently provide more efficient getOperand methods.
3091 DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value)public: inline Value *getOperand(unsigned) const; inline void
setOperand(unsigned, Value*); inline op_iterator op_begin();
inline const_op_iterator op_begin() const; inline op_iterator
op_end(); inline const_op_iterator op_end() const; protected
: template <int> inline Use &Op(); template <int
> inline const Use &Op() const; public: inline unsigned
getNumOperands() const
;
3092
3093 bool isUnconditional() const { return getNumOperands() == 1; }
3094 bool isConditional() const { return getNumOperands() == 3; }
3095
3096 Value *getCondition() const {
3097 assert(isConditional() && "Cannot get condition of an uncond branch!")((isConditional() && "Cannot get condition of an uncond branch!"
) ? static_cast<void> (0) : __assert_fail ("isConditional() && \"Cannot get condition of an uncond branch!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 3097, __PRETTY_FUNCTION__))
;
3098 return Op<-3>();
3099 }
3100
3101 void setCondition(Value *V) {
3102 assert(isConditional() && "Cannot set condition of unconditional branch!")((isConditional() && "Cannot set condition of unconditional branch!"
) ? static_cast<void> (0) : __assert_fail ("isConditional() && \"Cannot set condition of unconditional branch!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 3102, __PRETTY_FUNCTION__))
;
3103 Op<-3>() = V;
3104 }
3105
3106 unsigned getNumSuccessors() const { return 1+isConditional(); }
3107
3108 BasicBlock *getSuccessor(unsigned i) const {
3109 assert(i < getNumSuccessors() && "Successor # out of range for Branch!")((i < getNumSuccessors() && "Successor # out of range for Branch!"
) ? static_cast<void> (0) : __assert_fail ("i < getNumSuccessors() && \"Successor # out of range for Branch!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 3109, __PRETTY_FUNCTION__))
;
3110 return cast_or_null<BasicBlock>((&Op<-1>() - i)->get());
3111 }
3112
3113 void setSuccessor(unsigned idx, BasicBlock *NewSucc) {
3114 assert(idx < getNumSuccessors() && "Successor # out of range for Branch!")((idx < getNumSuccessors() && "Successor # out of range for Branch!"
) ? static_cast<void> (0) : __assert_fail ("idx < getNumSuccessors() && \"Successor # out of range for Branch!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 3114, __PRETTY_FUNCTION__))
;
3115 *(&Op<-1>() - idx) = NewSucc;
3116 }
3117
3118 /// Swap the successors of this branch instruction.
3119 ///
3120 /// Swaps the successors of the branch instruction. This also swaps any
3121 /// branch weight metadata associated with the instruction so that it
3122 /// continues to map correctly to each operand.
3123 void swapSuccessors();
3124
3125 iterator_range<succ_op_iterator> successors() {
3126 return make_range(
3127 succ_op_iterator(std::next(value_op_begin(), isConditional() ? 1 : 0)),
3128 succ_op_iterator(value_op_end()));
3129 }
3130
3131 iterator_range<const_succ_op_iterator> successors() const {
3132 return make_range(const_succ_op_iterator(
3133 std::next(value_op_begin(), isConditional() ? 1 : 0)),
3134 const_succ_op_iterator(value_op_end()));
3135 }
3136
3137 // Methods for support type inquiry through isa, cast, and dyn_cast:
3138 static bool classof(const Instruction *I) {
3139 return (I->getOpcode() == Instruction::Br);
3140 }
3141 static bool classof(const Value *V) {
3142 return isa<Instruction>(V) && classof(cast<Instruction>(V));
3143 }
3144};
3145
3146template <>
3147struct OperandTraits<BranchInst> : public VariadicOperandTraits<BranchInst, 1> {
3148};
3149
3150DEFINE_TRANSPARENT_OPERAND_ACCESSORS(BranchInst, Value)BranchInst::op_iterator BranchInst::op_begin() { return OperandTraits
<BranchInst>::op_begin(this); } BranchInst::const_op_iterator
BranchInst::op_begin() const { return OperandTraits<BranchInst
>::op_begin(const_cast<BranchInst*>(this)); } BranchInst
::op_iterator BranchInst::op_end() { return OperandTraits<
BranchInst>::op_end(this); } BranchInst::const_op_iterator
BranchInst::op_end() const { return OperandTraits<BranchInst
>::op_end(const_cast<BranchInst*>(this)); } Value *BranchInst
::getOperand(unsigned i_nocapture) const { ((i_nocapture <
OperandTraits<BranchInst>::operands(this) && "getOperand() out of range!"
) ? static_cast<void> (0) : __assert_fail ("i_nocapture < OperandTraits<BranchInst>::operands(this) && \"getOperand() out of range!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 3150, __PRETTY_FUNCTION__)); return cast_or_null<Value>
( OperandTraits<BranchInst>::op_begin(const_cast<BranchInst
*>(this))[i_nocapture].get()); } void BranchInst::setOperand
(unsigned i_nocapture, Value *Val_nocapture) { ((i_nocapture <
OperandTraits<BranchInst>::operands(this) && "setOperand() out of range!"
) ? static_cast<void> (0) : __assert_fail ("i_nocapture < OperandTraits<BranchInst>::operands(this) && \"setOperand() out of range!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 3150, __PRETTY_FUNCTION__)); OperandTraits<BranchInst>
::op_begin(this)[i_nocapture] = Val_nocapture; } unsigned BranchInst
::getNumOperands() const { return OperandTraits<BranchInst
>::operands(this); } template <int Idx_nocapture> Use
&BranchInst::Op() { return this->OpFrom<Idx_nocapture
>(this); } template <int Idx_nocapture> const Use &
BranchInst::Op() const { return this->OpFrom<Idx_nocapture
>(this); }
3151
3152//===----------------------------------------------------------------------===//
3153// SwitchInst Class
3154//===----------------------------------------------------------------------===//
3155
3156//===---------------------------------------------------------------------------
3157/// Multiway switch
3158///
3159class SwitchInst : public Instruction {
3160 unsigned ReservedSpace;
3161
3162 // Operand[0] = Value to switch on
3163 // Operand[1] = Default basic block destination
3164 // Operand[2n ] = Value to match
3165 // Operand[2n+1] = BasicBlock to go to on match
3166 SwitchInst(const SwitchInst &SI);
3167
3168 /// Create a new switch instruction, specifying a value to switch on and a
3169 /// default destination. The number of additional cases can be specified here
3170 /// to make memory allocation more efficient. This constructor can also
3171 /// auto-insert before another instruction.
3172 SwitchInst(Value *Value, BasicBlock *Default, unsigned NumCases,
3173 Instruction *InsertBefore);
3174
3175 /// Create a new switch instruction, specifying a value to switch on and a
3176 /// default destination. The number of additional cases can be specified here
3177 /// to make memory allocation more efficient. This constructor also
3178 /// auto-inserts at the end of the specified BasicBlock.
3179 SwitchInst(Value *Value, BasicBlock *Default, unsigned NumCases,
3180 BasicBlock *InsertAtEnd);
3181
3182 // allocate space for exactly zero operands
3183 void *operator new(size_t s) {
3184 return User::operator new(s);
3185 }
3186
3187 void init(Value *Value, BasicBlock *Default, unsigned NumReserved);
3188 void growOperands();
3189
3190protected:
3191 // Note: Instruction needs to be a friend here to call cloneImpl.
3192 friend class Instruction;
3193
3194 SwitchInst *cloneImpl() const;
3195
3196public:
3197 // -2
3198 static const unsigned DefaultPseudoIndex = static_cast<unsigned>(~0L-1);
3199
3200 template <typename CaseHandleT> class CaseIteratorImpl;
3201
3202 /// A handle to a particular switch case. It exposes a convenient interface
3203 /// to both the case value and the successor block.
3204 ///
3205 /// We define this as a template and instantiate it to form both a const and
3206 /// non-const handle.
3207 template <typename SwitchInstT, typename ConstantIntT, typename BasicBlockT>
3208 class CaseHandleImpl {
3209 // Directly befriend both const and non-const iterators.
3210 friend class SwitchInst::CaseIteratorImpl<
3211 CaseHandleImpl<SwitchInstT, ConstantIntT, BasicBlockT>>;
3212
3213 protected:
3214 // Expose the switch type we're parameterized with to the iterator.
3215 using SwitchInstType = SwitchInstT;
3216
3217 SwitchInstT *SI;
3218 ptrdiff_t Index;
3219
3220 CaseHandleImpl() = default;
3221 CaseHandleImpl(SwitchInstT *SI, ptrdiff_t Index) : SI(SI), Index(Index) {}
3222
3223 public:
3224 /// Resolves case value for current case.
3225 ConstantIntT *getCaseValue() const {
3226 assert((unsigned)Index < SI->getNumCases() &&(((unsigned)Index < SI->getNumCases() && "Index out the number of cases."
) ? static_cast<void> (0) : __assert_fail ("(unsigned)Index < SI->getNumCases() && \"Index out the number of cases.\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 3227, __PRETTY_FUNCTION__))
3227 "Index out the number of cases.")(((unsigned)Index < SI->getNumCases() && "Index out the number of cases."
) ? static_cast<void> (0) : __assert_fail ("(unsigned)Index < SI->getNumCases() && \"Index out the number of cases.\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 3227, __PRETTY_FUNCTION__))
;
3228 return reinterpret_cast<ConstantIntT *>(SI->getOperand(2 + Index * 2));
3229 }
3230
3231 /// Resolves successor for current case.
3232 BasicBlockT *getCaseSuccessor() const {
3233 assert(((unsigned)Index < SI->getNumCases() ||((((unsigned)Index < SI->getNumCases() || (unsigned)Index
== DefaultPseudoIndex) && "Index out the number of cases."
) ? static_cast<void> (0) : __assert_fail ("((unsigned)Index < SI->getNumCases() || (unsigned)Index == DefaultPseudoIndex) && \"Index out the number of cases.\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 3235, __PRETTY_FUNCTION__))
3234 (unsigned)Index == DefaultPseudoIndex) &&((((unsigned)Index < SI->getNumCases() || (unsigned)Index
== DefaultPseudoIndex) && "Index out the number of cases."
) ? static_cast<void> (0) : __assert_fail ("((unsigned)Index < SI->getNumCases() || (unsigned)Index == DefaultPseudoIndex) && \"Index out the number of cases.\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 3235, __PRETTY_FUNCTION__))
3235 "Index out the number of cases.")((((unsigned)Index < SI->getNumCases() || (unsigned)Index
== DefaultPseudoIndex) && "Index out the number of cases."
) ? static_cast<void> (0) : __assert_fail ("((unsigned)Index < SI->getNumCases() || (unsigned)Index == DefaultPseudoIndex) && \"Index out the number of cases.\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 3235, __PRETTY_FUNCTION__))
;
3236 return SI->getSuccessor(getSuccessorIndex());
3237 }
3238
3239 /// Returns number of current case.
3240 unsigned getCaseIndex() const { return Index; }
3241
3242 /// Returns successor index for current case successor.
3243 unsigned getSuccessorIndex() const {
3244 assert(((unsigned)Index == DefaultPseudoIndex ||((((unsigned)Index == DefaultPseudoIndex || (unsigned)Index <
SI->getNumCases()) && "Index out the number of cases."
) ? static_cast<void> (0) : __assert_fail ("((unsigned)Index == DefaultPseudoIndex || (unsigned)Index < SI->getNumCases()) && \"Index out the number of cases.\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 3246, __PRETTY_FUNCTION__))
3245 (unsigned)Index < SI->getNumCases()) &&((((unsigned)Index == DefaultPseudoIndex || (unsigned)Index <
SI->getNumCases()) && "Index out the number of cases."
) ? static_cast<void> (0) : __assert_fail ("((unsigned)Index == DefaultPseudoIndex || (unsigned)Index < SI->getNumCases()) && \"Index out the number of cases.\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 3246, __PRETTY_FUNCTION__))
3246 "Index out the number of cases.")((((unsigned)Index == DefaultPseudoIndex || (unsigned)Index <
SI->getNumCases()) && "Index out the number of cases."
) ? static_cast<void> (0) : __assert_fail ("((unsigned)Index == DefaultPseudoIndex || (unsigned)Index < SI->getNumCases()) && \"Index out the number of cases.\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 3246, __PRETTY_FUNCTION__))
;
3247 return (unsigned)Index != DefaultPseudoIndex ? Index + 1 : 0;
3248 }
3249
3250 bool operator==(const CaseHandleImpl &RHS) const {
3251 assert(SI == RHS.SI && "Incompatible operators.")((SI == RHS.SI && "Incompatible operators.") ? static_cast
<void> (0) : __assert_fail ("SI == RHS.SI && \"Incompatible operators.\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 3251, __PRETTY_FUNCTION__))
;
3252 return Index == RHS.Index;
3253 }
3254 };
3255
3256 using ConstCaseHandle =
3257 CaseHandleImpl<const SwitchInst, const ConstantInt, const BasicBlock>;
3258
3259 class CaseHandle
3260 : public CaseHandleImpl<SwitchInst, ConstantInt, BasicBlock> {
3261 friend class SwitchInst::CaseIteratorImpl<CaseHandle>;
3262
3263 public:
3264 CaseHandle(SwitchInst *SI, ptrdiff_t Index) : CaseHandleImpl(SI, Index) {}
3265
3266 /// Sets the new value for current case.
3267 void setValue(ConstantInt *V) {
3268 assert((unsigned)Index < SI->getNumCases() &&(((unsigned)Index < SI->getNumCases() && "Index out the number of cases."
) ? static_cast<void> (0) : __assert_fail ("(unsigned)Index < SI->getNumCases() && \"Index out the number of cases.\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 3269, __PRETTY_FUNCTION__))
3269 "Index out the number of cases.")(((unsigned)Index < SI->getNumCases() && "Index out the number of cases."
) ? static_cast<void> (0) : __assert_fail ("(unsigned)Index < SI->getNumCases() && \"Index out the number of cases.\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 3269, __PRETTY_FUNCTION__))
;
3270 SI->setOperand(2 + Index*2, reinterpret_cast<Value*>(V));
3271 }
3272
3273 /// Sets the new successor for current case.
3274 void setSuccessor(BasicBlock *S) {
3275 SI->setSuccessor(getSuccessorIndex(), S);
3276 }
3277 };
3278
3279 template <typename CaseHandleT>
3280 class CaseIteratorImpl
3281 : public iterator_facade_base<CaseIteratorImpl<CaseHandleT>,
3282 std::random_access_iterator_tag,
3283 CaseHandleT> {
3284 using SwitchInstT = typename CaseHandleT::SwitchInstType;
3285
3286 CaseHandleT Case;
3287
3288 public:
3289 /// Default constructed iterator is in an invalid state until assigned to
3290 /// a case for a particular switch.
3291 CaseIteratorImpl() = default;
3292
3293 /// Initializes case iterator for given SwitchInst and for given
3294 /// case number.
3295 CaseIteratorImpl(SwitchInstT *SI, unsigned CaseNum) : Case(SI, CaseNum) {}
3296
3297 /// Initializes case iterator for given SwitchInst and for given
3298 /// successor index.
3299 static CaseIteratorImpl fromSuccessorIndex(SwitchInstT *SI,
3300 unsigned SuccessorIndex) {
3301 assert(SuccessorIndex < SI->getNumSuccessors() &&((SuccessorIndex < SI->getNumSuccessors() && "Successor index # out of range!"
) ? static_cast<void> (0) : __assert_fail ("SuccessorIndex < SI->getNumSuccessors() && \"Successor index # out of range!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 3302, __PRETTY_FUNCTION__))
3302 "Successor index # out of range!")((SuccessorIndex < SI->getNumSuccessors() && "Successor index # out of range!"
) ? static_cast<void> (0) : __assert_fail ("SuccessorIndex < SI->getNumSuccessors() && \"Successor index # out of range!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 3302, __PRETTY_FUNCTION__))
;
3303 return SuccessorIndex != 0 ? CaseIteratorImpl(SI, SuccessorIndex - 1)
3304 : CaseIteratorImpl(SI, DefaultPseudoIndex);
3305 }
3306
3307 /// Support converting to the const variant. This will be a no-op for const
3308 /// variant.
3309 operator CaseIteratorImpl<ConstCaseHandle>() const {
3310 return CaseIteratorImpl<ConstCaseHandle>(Case.SI, Case.Index);
3311 }
3312
3313 CaseIteratorImpl &operator+=(ptrdiff_t N) {
3314 // Check index correctness after addition.
3315 // Note: Index == getNumCases() means end().
3316 assert(Case.Index + N >= 0 &&((Case.Index + N >= 0 && (unsigned)(Case.Index + N
) <= Case.SI->getNumCases() && "Case.Index out the number of cases."
) ? static_cast<void> (0) : __assert_fail ("Case.Index + N >= 0 && (unsigned)(Case.Index + N) <= Case.SI->getNumCases() && \"Case.Index out the number of cases.\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 3318, __PRETTY_FUNCTION__))
3317 (unsigned)(Case.Index + N) <= Case.SI->getNumCases() &&((Case.Index + N >= 0 && (unsigned)(Case.Index + N
) <= Case.SI->getNumCases() && "Case.Index out the number of cases."
) ? static_cast<void> (0) : __assert_fail ("Case.Index + N >= 0 && (unsigned)(Case.Index + N) <= Case.SI->getNumCases() && \"Case.Index out the number of cases.\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 3318, __PRETTY_FUNCTION__))
3318 "Case.Index out the number of cases.")((Case.Index + N >= 0 && (unsigned)(Case.Index + N
) <= Case.SI->getNumCases() && "Case.Index out the number of cases."
) ? static_cast<void> (0) : __assert_fail ("Case.Index + N >= 0 && (unsigned)(Case.Index + N) <= Case.SI->getNumCases() && \"Case.Index out the number of cases.\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 3318, __PRETTY_FUNCTION__))
;
3319 Case.Index += N;
3320 return *this;
3321 }
3322 CaseIteratorImpl &operator-=(ptrdiff_t N) {
3323 // Check index correctness after subtraction.
3324 // Note: Case.Index == getNumCases() means end().
3325 assert(Case.Index - N >= 0 &&((Case.Index - N >= 0 && (unsigned)(Case.Index - N
) <= Case.SI->getNumCases() && "Case.Index out the number of cases."
) ? static_cast<void> (0) : __assert_fail ("Case.Index - N >= 0 && (unsigned)(Case.Index - N) <= Case.SI->getNumCases() && \"Case.Index out the number of cases.\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 3327, __PRETTY_FUNCTION__))
3326 (unsigned)(Case.Index - N) <= Case.SI->getNumCases() &&((Case.Index - N >= 0 && (unsigned)(Case.Index - N
) <= Case.SI->getNumCases() && "Case.Index out the number of cases."
) ? static_cast<void> (0) : __assert_fail ("Case.Index - N >= 0 && (unsigned)(Case.Index - N) <= Case.SI->getNumCases() && \"Case.Index out the number of cases.\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 3327, __PRETTY_FUNCTION__))
3327 "Case.Index out the number of cases.")((Case.Index - N >= 0 && (unsigned)(Case.Index - N
) <= Case.SI->getNumCases() && "Case.Index out the number of cases."
) ? static_cast<void> (0) : __assert_fail ("Case.Index - N >= 0 && (unsigned)(Case.Index - N) <= Case.SI->getNumCases() && \"Case.Index out the number of cases.\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 3327, __PRETTY_FUNCTION__))
;
3328 Case.Index -= N;
3329 return *this;
3330 }
3331 ptrdiff_t operator-(const CaseIteratorImpl &RHS) const {
3332 assert(Case.SI == RHS.Case.SI && "Incompatible operators.")((Case.SI == RHS.Case.SI && "Incompatible operators."
) ? static_cast<void> (0) : __assert_fail ("Case.SI == RHS.Case.SI && \"Incompatible operators.\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 3332, __PRETTY_FUNCTION__))
;
3333 return Case.Index - RHS.Case.Index;
3334 }
3335 bool operator==(const CaseIteratorImpl &RHS) const {
3336 return Case == RHS.Case;
3337 }
3338 bool operator<(const CaseIteratorImpl &RHS) const {
3339 assert(Case.SI == RHS.Case.SI && "Incompatible operators.")((Case.SI == RHS.Case.SI && "Incompatible operators."
) ? static_cast<void> (0) : __assert_fail ("Case.SI == RHS.Case.SI && \"Incompatible operators.\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 3339, __PRETTY_FUNCTION__))
;
3340 return Case.Index < RHS.Case.Index;
3341 }
3342 CaseHandleT &operator*() { return Case; }
3343 const CaseHandleT &operator*() const { return Case; }
3344 };
3345
3346 using CaseIt = CaseIteratorImpl<CaseHandle>;
3347 using ConstCaseIt = CaseIteratorImpl<ConstCaseHandle>;
3348
3349 static SwitchInst *Create(Value *Value, BasicBlock *Default,
3350 unsigned NumCases,
3351 Instruction *InsertBefore = nullptr) {
3352 return new SwitchInst(Value, Default, NumCases, InsertBefore);
3353 }
3354
3355 static SwitchInst *Create(Value *Value, BasicBlock *Default,
3356 unsigned NumCases, BasicBlock *InsertAtEnd) {
3357 return new SwitchInst(Value, Default, NumCases, InsertAtEnd);
3358 }
3359
3360 /// Provide fast operand accessors
3361 DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value)public: inline Value *getOperand(unsigned) const; inline void
setOperand(unsigned, Value*); inline op_iterator op_begin();
inline const_op_iterator op_begin() const; inline op_iterator
op_end(); inline const_op_iterator op_end() const; protected
: template <int> inline Use &Op(); template <int
> inline const Use &Op() const; public: inline unsigned
getNumOperands() const
;
3362
3363 // Accessor Methods for Switch stmt
3364 Value *getCondition() const { return getOperand(0); }
3365 void setCondition(Value *V) { setOperand(0, V); }
3366
3367 BasicBlock *getDefaultDest() const {
3368 return cast<BasicBlock>(getOperand(1));
3369 }
3370
3371 void setDefaultDest(BasicBlock *DefaultCase) {
3372 setOperand(1, reinterpret_cast<Value*>(DefaultCase));
3373 }
3374
3375 /// Return the number of 'cases' in this switch instruction, excluding the
3376 /// default case.
3377 unsigned getNumCases() const {
3378 return getNumOperands()/2 - 1;
3379 }
3380
3381 /// Returns a read/write iterator that points to the first case in the
3382 /// SwitchInst.
3383 CaseIt case_begin() {
3384 return CaseIt(this, 0);
3385 }
3386
3387 /// Returns a read-only iterator that points to the first case in the
3388 /// SwitchInst.
3389 ConstCaseIt case_begin() const {
3390 return ConstCaseIt(this, 0);
3391 }
3392
3393 /// Returns a read/write iterator that points one past the last in the
3394 /// SwitchInst.
3395 CaseIt case_end() {
3396 return CaseIt(this, getNumCases());
3397 }
3398
3399 /// Returns a read-only iterator that points one past the last in the
3400 /// SwitchInst.
3401 ConstCaseIt case_end() const {
3402 return ConstCaseIt(this, getNumCases());
3403 }
3404
3405 /// Iteration adapter for range-for loops.
3406 iterator_range<CaseIt> cases() {
3407 return make_range(case_begin(), case_end());
3408 }
3409
3410 /// Constant iteration adapter for range-for loops.
3411 iterator_range<ConstCaseIt> cases() const {
3412 return make_range(case_begin(), case_end());
3413 }
3414
3415 /// Returns an iterator that points to the default case.
3416 /// Note: this iterator allows to resolve successor only. Attempt
3417 /// to resolve case value causes an assertion.
3418 /// Also note, that increment and decrement also causes an assertion and
3419 /// makes iterator invalid.
3420 CaseIt case_default() {
3421 return CaseIt(this, DefaultPseudoIndex);
3422 }
3423 ConstCaseIt case_default() const {
3424 return ConstCaseIt(this, DefaultPseudoIndex);
3425 }
3426
3427 /// Search all of the case values for the specified constant. If it is
3428 /// explicitly handled, return the case iterator of it, otherwise return
3429 /// default case iterator to indicate that it is handled by the default
3430 /// handler.
3431 CaseIt findCaseValue(const ConstantInt *C) {
3432 CaseIt I = llvm::find_if(
3433 cases(), [C](CaseHandle &Case) { return Case.getCaseValue() == C; });
3434 if (I != case_end())
3435 return I;
3436
3437 return case_default();
3438 }
3439 ConstCaseIt findCaseValue(const ConstantInt *C) const {
3440 ConstCaseIt I = llvm::find_if(cases(), [C](ConstCaseHandle &Case) {
3441 return Case.getCaseValue() == C;
3442 });
3443 if (I != case_end())
3444 return I;
3445
3446 return case_default();
3447 }
3448
3449 /// Finds the unique case value for a given successor. Returns null if the
3450 /// successor is not found, not unique, or is the default case.
3451 ConstantInt *findCaseDest(BasicBlock *BB) {
3452 if (BB == getDefaultDest())
3453 return nullptr;
3454
3455 ConstantInt *CI = nullptr;
3456 for (auto Case : cases()) {
3457 if (Case.getCaseSuccessor() != BB)
3458 continue;
3459
3460 if (CI)
3461 return nullptr; // Multiple cases lead to BB.
3462
3463 CI = Case.getCaseValue();
3464 }
3465
3466 return CI;
3467 }
3468
3469 /// Add an entry to the switch instruction.
3470 /// Note:
3471 /// This action invalidates case_end(). Old case_end() iterator will
3472 /// point to the added case.
3473 void addCase(ConstantInt *OnVal, BasicBlock *Dest);
3474
3475 /// This method removes the specified case and its successor from the switch
3476 /// instruction. Note that this operation may reorder the remaining cases at
3477 /// index idx and above.
3478 /// Note:
3479 /// This action invalidates iterators for all cases following the one removed,
3480 /// including the case_end() iterator. It returns an iterator for the next
3481 /// case.
3482 CaseIt removeCase(CaseIt I);
3483
3484 unsigned getNumSuccessors() const { return getNumOperands()/2; }
3485 BasicBlock *getSuccessor(unsigned idx) const {
3486 assert(idx < getNumSuccessors() &&"Successor idx out of range for switch!")((idx < getNumSuccessors() &&"Successor idx out of range for switch!"
) ? static_cast<void> (0) : __assert_fail ("idx < getNumSuccessors() &&\"Successor idx out of range for switch!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 3486, __PRETTY_FUNCTION__))
;
3487 return cast<BasicBlock>(getOperand(idx*2+1));
3488 }
3489 void setSuccessor(unsigned idx, BasicBlock *NewSucc) {
3490 assert(idx < getNumSuccessors() && "Successor # out of range for switch!")((idx < getNumSuccessors() && "Successor # out of range for switch!"
) ? static_cast<void> (0) : __assert_fail ("idx < getNumSuccessors() && \"Successor # out of range for switch!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 3490, __PRETTY_FUNCTION__))
;
3491 setOperand(idx * 2 + 1, NewSucc);
3492 }
3493
3494 // Methods for support type inquiry through isa, cast, and dyn_cast:
3495 static bool classof(const Instruction *I) {
3496 return I->getOpcode() == Instruction::Switch;
3497 }
3498 static bool classof(const Value *V) {
3499 return isa<Instruction>(V) && classof(cast<Instruction>(V));
3500 }
3501};
3502
3503/// A wrapper class to simplify modification of SwitchInst cases along with
3504/// their prof branch_weights metadata.
3505class SwitchInstProfUpdateWrapper {
3506 SwitchInst &SI;
3507 Optional<SmallVector<uint32_t, 8> > Weights = None;
3508 bool Changed = false;
3509
3510protected:
3511 static MDNode *getProfBranchWeightsMD(const SwitchInst &SI);
3512
3513 MDNode *buildProfBranchWeightsMD();
3514
3515 void init();
3516
3517public:
3518 using CaseWeightOpt = Optional<uint32_t>;
3519 SwitchInst *operator->() { return &SI; }
3520 SwitchInst &operator*() { return SI; }
3521 operator SwitchInst *() { return &SI; }
3522
3523 SwitchInstProfUpdateWrapper(SwitchInst &SI) : SI(SI) { init(); }
3524
3525 ~SwitchInstProfUpdateWrapper() {
3526 if (Changed)
3527 SI.setMetadata(LLVMContext::MD_prof, buildProfBranchWeightsMD());
3528 }
3529
3530 /// Delegate the call to the underlying SwitchInst::removeCase() and remove
3531 /// correspondent branch weight.
3532 SwitchInst::CaseIt removeCase(SwitchInst::CaseIt I);
3533
3534 /// Delegate the call to the underlying SwitchInst::addCase() and set the
3535 /// specified branch weight for the added case.
3536 void addCase(ConstantInt *OnVal, BasicBlock *Dest, CaseWeightOpt W);
3537
3538 /// Delegate the call to the underlying SwitchInst::eraseFromParent() and mark
3539 /// this object to not touch the underlying SwitchInst in destructor.
3540 SymbolTableList<Instruction>::iterator eraseFromParent();
3541
3542 void setSuccessorWeight(unsigned idx, CaseWeightOpt W);
3543 CaseWeightOpt getSuccessorWeight(unsigned idx);
3544
3545 static CaseWeightOpt getSuccessorWeight(const SwitchInst &SI, unsigned idx);
3546};
3547
3548template <>
3549struct OperandTraits<SwitchInst> : public HungoffOperandTraits<2> {
3550};
3551
3552DEFINE_TRANSPARENT_OPERAND_ACCESSORS(SwitchInst, Value)SwitchInst::op_iterator SwitchInst::op_begin() { return OperandTraits
<SwitchInst>::op_begin(this); } SwitchInst::const_op_iterator
SwitchInst::op_begin() const { return OperandTraits<SwitchInst
>::op_begin(const_cast<SwitchInst*>(this)); } SwitchInst
::op_iterator SwitchInst::op_end() { return OperandTraits<
SwitchInst>::op_end(this); } SwitchInst::const_op_iterator
SwitchInst::op_end() const { return OperandTraits<SwitchInst
>::op_end(const_cast<SwitchInst*>(this)); } Value *SwitchInst
::getOperand(unsigned i_nocapture) const { ((i_nocapture <
OperandTraits<SwitchInst>::operands(this) && "getOperand() out of range!"
) ? static_cast<void> (0) : __assert_fail ("i_nocapture < OperandTraits<SwitchInst>::operands(this) && \"getOperand() out of range!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 3552, __PRETTY_FUNCTION__)); return cast_or_null<Value>
( OperandTraits<SwitchInst>::op_begin(const_cast<SwitchInst
*>(this))[i_nocapture].get()); } void SwitchInst::setOperand
(unsigned i_nocapture, Value *Val_nocapture) { ((i_nocapture <
OperandTraits<SwitchInst>::operands(this) && "setOperand() out of range!"
) ? static_cast<void> (0) : __assert_fail ("i_nocapture < OperandTraits<SwitchInst>::operands(this) && \"setOperand() out of range!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 3552, __PRETTY_FUNCTION__)); OperandTraits<SwitchInst>
::op_begin(this)[i_nocapture] = Val_nocapture; } unsigned SwitchInst
::getNumOperands() const { return OperandTraits<SwitchInst
>::operands(this); } template <int Idx_nocapture> Use
&SwitchInst::Op() { return this->OpFrom<Idx_nocapture
>(this); } template <int Idx_nocapture> const Use &
SwitchInst::Op() const { return this->OpFrom<Idx_nocapture
>(this); }
3553
3554//===----------------------------------------------------------------------===//
3555// IndirectBrInst Class
3556//===----------------------------------------------------------------------===//
3557
3558//===---------------------------------------------------------------------------
3559/// Indirect Branch Instruction.
3560///
3561class IndirectBrInst : public Instruction {
3562 unsigned ReservedSpace;
3563
3564 // Operand[0] = Address to jump to
3565 // Operand[n+1] = n-th destination
3566 IndirectBrInst(const IndirectBrInst &IBI);
3567
3568 /// Create a new indirectbr instruction, specifying an
3569 /// Address to jump to. The number of expected destinations can be specified
3570 /// here to make memory allocation more efficient. This constructor can also
3571 /// autoinsert before another instruction.
3572 IndirectBrInst(Value *Address, unsigned NumDests, Instruction *InsertBefore);
3573
3574 /// Create a new indirectbr instruction, specifying an
3575 /// Address to jump to. The number of expected destinations can be specified
3576 /// here to make memory allocation more efficient. This constructor also
3577 /// autoinserts at the end of the specified BasicBlock.
3578 IndirectBrInst(Value *Address, unsigned NumDests, BasicBlock *InsertAtEnd);
3579
3580 // allocate space for exactly zero operands
3581 void *operator new(size_t s) {
3582 return User::operator new(s);
3583 }
3584
3585 void init(Value *Address, unsigned NumDests);
3586 void growOperands();
3587
3588protected:
3589 // Note: Instruction needs to be a friend here to call cloneImpl.
3590 friend class Instruction;
3591
3592 IndirectBrInst *cloneImpl() const;
3593
3594public:
3595 /// Iterator type that casts an operand to a basic block.
3596 ///
3597 /// This only makes sense because the successors are stored as adjacent
3598 /// operands for indirectbr instructions.
3599 struct succ_op_iterator
3600 : iterator_adaptor_base<succ_op_iterator, value_op_iterator,
3601 std::random_access_iterator_tag, BasicBlock *,
3602 ptrdiff_t, BasicBlock *, BasicBlock *> {
3603 explicit succ_op_iterator(value_op_iterator I) : iterator_adaptor_base(I) {}
3604
3605 BasicBlock *operator*() const { return cast<BasicBlock>(*I); }
3606 BasicBlock *operator->() const { return operator*(); }
3607 };
3608
3609 /// The const version of `succ_op_iterator`.
3610 struct const_succ_op_iterator
3611 : iterator_adaptor_base<const_succ_op_iterator, const_value_op_iterator,
3612 std::random_access_iterator_tag,
3613 const BasicBlock *, ptrdiff_t, const BasicBlock *,
3614 const BasicBlock *> {
3615 explicit const_succ_op_iterator(const_value_op_iterator I)
3616 : iterator_adaptor_base(I) {}
3617
3618 const BasicBlock *operator*() const { return cast<BasicBlock>(*I); }
3619 const BasicBlock *operator->() const { return operator*(); }
3620 };
3621
3622 static IndirectBrInst *Create(Value *Address, unsigned NumDests,
3623 Instruction *InsertBefore = nullptr) {
3624 return new IndirectBrInst(Address, NumDests, InsertBefore);
3625 }
3626
3627 static IndirectBrInst *Create(Value *Address, unsigned NumDests,
3628 BasicBlock *InsertAtEnd) {
3629 return new IndirectBrInst(Address, NumDests, InsertAtEnd);
3630 }
3631
3632 /// Provide fast operand accessors.
3633 DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value)public: inline Value *getOperand(unsigned) const; inline void
setOperand(unsigned, Value*); inline op_iterator op_begin();
inline const_op_iterator op_begin() const; inline op_iterator
op_end(); inline const_op_iterator op_end() const; protected
: template <int> inline Use &Op(); template <int
> inline const Use &Op() const; public: inline unsigned
getNumOperands() const
;
3634
3635 // Accessor Methods for IndirectBrInst instruction.
3636 Value *getAddress() { return getOperand(0); }
3637 const Value *getAddress() const { return getOperand(0); }
3638 void setAddress(Value *V) { setOperand(0, V); }
3639
3640 /// return the number of possible destinations in this
3641 /// indirectbr instruction.
3642 unsigned getNumDestinations() const { return getNumOperands()-1; }
3643
3644 /// Return the specified destination.
3645 BasicBlock *getDestination(unsigned i) { return getSuccessor(i); }
3646 const BasicBlock *getDestination(unsigned i) const { return getSuccessor(i); }
3647
3648 /// Add a destination.
3649 ///
3650 void addDestination(BasicBlock *Dest);
3651
3652 /// This method removes the specified successor from the
3653 /// indirectbr instruction.
3654 void removeDestination(unsigned i);
3655
3656 unsigned getNumSuccessors() const { return getNumOperands()-1; }
3657 BasicBlock *getSuccessor(unsigned i) const {
3658 return cast<BasicBlock>(getOperand(i+1));
3659 }
3660 void setSuccessor(unsigned i, BasicBlock *NewSucc) {
3661 setOperand(i + 1, NewSucc);
3662 }
3663
3664 iterator_range<succ_op_iterator> successors() {
3665 return make_range(succ_op_iterator(std::next(value_op_begin())),
3666 succ_op_iterator(value_op_end()));
3667 }
3668
3669 iterator_range<const_succ_op_iterator> successors() const {
3670 return make_range(const_succ_op_iterator(std::next(value_op_begin())),
3671 const_succ_op_iterator(value_op_end()));
3672 }
3673
3674 // Methods for support type inquiry through isa, cast, and dyn_cast:
3675 static bool classof(const Instruction *I) {
3676 return I->getOpcode() == Instruction::IndirectBr;
3677 }
3678 static bool classof(const Value *V) {
3679 return isa<Instruction>(V) && classof(cast<Instruction>(V));
3680 }
3681};
3682
3683template <>
3684struct OperandTraits<IndirectBrInst> : public HungoffOperandTraits<1> {
3685};
3686
3687DEFINE_TRANSPARENT_OPERAND_ACCESSORS(IndirectBrInst, Value)IndirectBrInst::op_iterator IndirectBrInst::op_begin() { return
OperandTraits<IndirectBrInst>::op_begin(this); } IndirectBrInst
::const_op_iterator IndirectBrInst::op_begin() const { return
OperandTraits<IndirectBrInst>::op_begin(const_cast<
IndirectBrInst*>(this)); } IndirectBrInst::op_iterator IndirectBrInst
::op_end() { return OperandTraits<IndirectBrInst>::op_end
(this); } IndirectBrInst::const_op_iterator IndirectBrInst::op_end
() const { return OperandTraits<IndirectBrInst>::op_end
(const_cast<IndirectBrInst*>(this)); } Value *IndirectBrInst
::getOperand(unsigned i_nocapture) const { ((i_nocapture <
OperandTraits<IndirectBrInst>::operands(this) &&
"getOperand() out of range!") ? static_cast<void> (0) :
__assert_fail ("i_nocapture < OperandTraits<IndirectBrInst>::operands(this) && \"getOperand() out of range!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 3687, __PRETTY_FUNCTION__)); return cast_or_null<Value>
( OperandTraits<IndirectBrInst>::op_begin(const_cast<
IndirectBrInst*>(this))[i_nocapture].get()); } void IndirectBrInst
::setOperand(unsigned i_nocapture, Value *Val_nocapture) { ((
i_nocapture < OperandTraits<IndirectBrInst>::operands
(this) && "setOperand() out of range!") ? static_cast
<void> (0) : __assert_fail ("i_nocapture < OperandTraits<IndirectBrInst>::operands(this) && \"setOperand() out of range!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 3687, __PRETTY_FUNCTION__)); OperandTraits<IndirectBrInst
>::op_begin(this)[i_nocapture] = Val_nocapture; } unsigned
IndirectBrInst::getNumOperands() const { return OperandTraits
<IndirectBrInst>::operands(this); } template <int Idx_nocapture
> Use &IndirectBrInst::Op() { return this->OpFrom<
Idx_nocapture>(this); } template <int Idx_nocapture>
const Use &IndirectBrInst::Op() const { return this->
OpFrom<Idx_nocapture>(this); }
3688
3689//===----------------------------------------------------------------------===//
3690// InvokeInst Class
3691//===----------------------------------------------------------------------===//
3692
3693/// Invoke instruction. The SubclassData field is used to hold the
3694/// calling convention of the call.
3695///
3696class InvokeInst : public CallBase {
3697 /// The number of operands for this call beyond the called function,
3698 /// arguments, and operand bundles.
3699 static constexpr int NumExtraOperands = 2;
3700
3701 /// The index from the end of the operand array to the normal destination.
3702 static constexpr int NormalDestOpEndIdx = -3;
3703
3704 /// The index from the end of the operand array to the unwind destination.
3705 static constexpr int UnwindDestOpEndIdx = -2;
3706
3707 InvokeInst(const InvokeInst &BI);
3708
3709 /// Construct an InvokeInst given a range of arguments.
3710 ///
3711 /// Construct an InvokeInst from a range of arguments
3712 inline InvokeInst(FunctionType *Ty, Value *Func, BasicBlock *IfNormal,
3713 BasicBlock *IfException, ArrayRef<Value *> Args,
3714 ArrayRef<OperandBundleDef> Bundles, int NumOperands,
3715 const Twine &NameStr, Instruction *InsertBefore);
3716
3717 inline InvokeInst(FunctionType *Ty, Value *Func, BasicBlock *IfNormal,
3718 BasicBlock *IfException, ArrayRef<Value *> Args,
3719 ArrayRef<OperandBundleDef> Bundles, int NumOperands,
3720 const Twine &NameStr, BasicBlock *InsertAtEnd);
3721
3722 void init(FunctionType *Ty, Value *Func, BasicBlock *IfNormal,
3723 BasicBlock *IfException, ArrayRef<Value *> Args,
3724 ArrayRef<OperandBundleDef> Bundles, const Twine &NameStr);
3725
3726 /// Compute the number of operands to allocate.
3727 static int ComputeNumOperands(int NumArgs, int NumBundleInputs = 0) {
3728 // We need one operand for the called function, plus our extra operands and
3729 // the input operand counts provided.
3730 return 1 + NumExtraOperands + NumArgs + NumBundleInputs;
3731 }
3732
3733protected:
3734 // Note: Instruction needs to be a friend here to call cloneImpl.
3735 friend class Instruction;
3736
3737 InvokeInst *cloneImpl() const;
3738
3739public:
3740 static InvokeInst *Create(FunctionType *Ty, Value *Func, BasicBlock *IfNormal,
3741 BasicBlock *IfException, ArrayRef<Value *> Args,
3742 const Twine &NameStr,
3743 Instruction *InsertBefore = nullptr) {
3744 int NumOperands = ComputeNumOperands(Args.size());
3745 return new (NumOperands)
3746 InvokeInst(Ty, Func, IfNormal, IfException, Args, None, NumOperands,
3747 NameStr, InsertBefore);
3748 }
3749
3750 static InvokeInst *Create(FunctionType *Ty, Value *Func, BasicBlock *IfNormal,
3751 BasicBlock *IfException, ArrayRef<Value *> Args,
3752 ArrayRef<OperandBundleDef> Bundles = None,
3753 const Twine &NameStr = "",
3754 Instruction *InsertBefore = nullptr) {
3755 int NumOperands =
3756 ComputeNumOperands(Args.size(), CountBundleInputs(Bundles));
3757 unsigned DescriptorBytes = Bundles.size() * sizeof(BundleOpInfo);
3758
3759 return new (NumOperands, DescriptorBytes)
3760 InvokeInst(Ty, Func, IfNormal, IfException, Args, Bundles, NumOperands,
3761 NameStr, InsertBefore);
3762 }
3763
3764 static InvokeInst *Create(FunctionType *Ty, Value *Func, BasicBlock *IfNormal,
3765 BasicBlock *IfException, ArrayRef<Value *> Args,
3766 const Twine &NameStr, BasicBlock *InsertAtEnd) {
3767 int NumOperands = ComputeNumOperands(Args.size());
3768 return new (NumOperands)
3769 InvokeInst(Ty, Func, IfNormal, IfException, Args, None, NumOperands,
3770 NameStr, InsertAtEnd);
3771 }
3772
3773 static InvokeInst *Create(FunctionType *Ty, Value *Func, BasicBlock *IfNormal,
3774 BasicBlock *IfException, ArrayRef<Value *> Args,
3775 ArrayRef<OperandBundleDef> Bundles,
3776 const Twine &NameStr, BasicBlock *InsertAtEnd) {
3777 int NumOperands =
3778 ComputeNumOperands(Args.size(), CountBundleInputs(Bundles));
3779 unsigned DescriptorBytes = Bundles.size() * sizeof(BundleOpInfo);
3780
3781 return new (NumOperands, DescriptorBytes)
3782 InvokeInst(Ty, Func, IfNormal, IfException, Args, Bundles, NumOperands,
3783 NameStr, InsertAtEnd);
3784 }
3785
3786 static InvokeInst *Create(FunctionCallee Func, BasicBlock *IfNormal,
3787 BasicBlock *IfException, ArrayRef<Value *> Args,
3788 const Twine &NameStr,
3789 Instruction *InsertBefore = nullptr) {
3790 return Create(Func.getFunctionType(), Func.getCallee(), IfNormal,
3791 IfException, Args, None, NameStr, InsertBefore);
3792 }
3793
3794 static InvokeInst *Create(FunctionCallee Func, BasicBlock *IfNormal,
3795 BasicBlock *IfException, ArrayRef<Value *> Args,
3796 ArrayRef<OperandBundleDef> Bundles = None,
3797 const Twine &NameStr = "",
3798 Instruction *InsertBefore = nullptr) {
3799 return Create(Func.getFunctionType(), Func.getCallee(), IfNormal,
3800 IfException, Args, Bundles, NameStr, InsertBefore);
3801 }
3802
3803 static InvokeInst *Create(FunctionCallee Func, BasicBlock *IfNormal,
3804 BasicBlock *IfException, ArrayRef<Value *> Args,
3805 const Twine &NameStr, BasicBlock *InsertAtEnd) {
3806 return Create(Func.getFunctionType(), Func.getCallee(), IfNormal,
3807 IfException, Args, NameStr, InsertAtEnd);
3808 }
3809
3810 static InvokeInst *Create(FunctionCallee Func, BasicBlock *IfNormal,
3811 BasicBlock *IfException, ArrayRef<Value *> Args,
3812 ArrayRef<OperandBundleDef> Bundles,
3813 const Twine &NameStr, BasicBlock *InsertAtEnd) {
3814 return Create(Func.getFunctionType(), Func.getCallee(), IfNormal,
3815 IfException, Args, Bundles, NameStr, InsertAtEnd);
3816 }
3817
3818 /// Create a clone of \p II with a different set of operand bundles and
3819 /// insert it before \p InsertPt.
3820 ///
3821 /// The returned invoke instruction is identical to \p II in every way except
3822 /// that the operand bundles for the new instruction are set to the operand
3823 /// bundles in \p Bundles.
3824 static InvokeInst *Create(InvokeInst *II, ArrayRef<OperandBundleDef> Bundles,
3825 Instruction *InsertPt = nullptr);
3826
3827 /// Create a clone of \p II with a different set of operand bundles and
3828 /// insert it before \p InsertPt.
3829 ///
3830 /// The returned invoke instruction is identical to \p II in every way except
3831 /// that the operand bundle for the new instruction is set to the operand
3832 /// bundle in \p Bundle.
3833 static InvokeInst *CreateWithReplacedBundle(InvokeInst *II,
3834 OperandBundleDef Bundles,
3835 Instruction *InsertPt = nullptr);
3836
3837 // get*Dest - Return the destination basic blocks...
3838 BasicBlock *getNormalDest() const {
3839 return cast<BasicBlock>(Op<NormalDestOpEndIdx>());
3840 }
3841 BasicBlock *getUnwindDest() const {
3842 return cast<BasicBlock>(Op<UnwindDestOpEndIdx>());
3843 }
3844 void setNormalDest(BasicBlock *B) {
3845 Op<NormalDestOpEndIdx>() = reinterpret_cast<Value *>(B);
3846 }
3847 void setUnwindDest(BasicBlock *B) {
3848 Op<UnwindDestOpEndIdx>() = reinterpret_cast<Value *>(B);
3849 }
3850
3851 /// Get the landingpad instruction from the landing pad
3852 /// block (the unwind destination).
3853 LandingPadInst *getLandingPadInst() const;
3854
3855 BasicBlock *getSuccessor(unsigned i) const {
3856 assert(i < 2 && "Successor # out of range for invoke!")((i < 2 && "Successor # out of range for invoke!")
? static_cast<void> (0) : __assert_fail ("i < 2 && \"Successor # out of range for invoke!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 3856, __PRETTY_FUNCTION__))
;
3857 return i == 0 ? getNormalDest() : getUnwindDest();
3858 }
3859
3860 void setSuccessor(unsigned i, BasicBlock *NewSucc) {
3861 assert(i < 2 && "Successor # out of range for invoke!")((i < 2 && "Successor # out of range for invoke!")
? static_cast<void> (0) : __assert_fail ("i < 2 && \"Successor # out of range for invoke!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 3861, __PRETTY_FUNCTION__))
;
3862 if (i == 0)
3863 setNormalDest(NewSucc);
3864 else
3865 setUnwindDest(NewSucc);
3866 }
3867
3868 unsigned getNumSuccessors() const { return 2; }
3869
3870 // Methods for support type inquiry through isa, cast, and dyn_cast:
3871 static bool classof(const Instruction *I) {
3872 return (I->getOpcode() == Instruction::Invoke);
3873 }
3874 static bool classof(const Value *V) {
3875 return isa<Instruction>(V) && classof(cast<Instruction>(V));
3876 }
3877
3878private:
3879 // Shadow Instruction::setInstructionSubclassData with a private forwarding
3880 // method so that subclasses cannot accidentally use it.
3881 template <typename Bitfield>
3882 void setSubclassData(typename Bitfield::Type Value) {
3883 Instruction::setSubclassData<Bitfield>(Value);
3884 }
3885};
3886
3887InvokeInst::InvokeInst(FunctionType *Ty, Value *Func, BasicBlock *IfNormal,
3888 BasicBlock *IfException, ArrayRef<Value *> Args,
3889 ArrayRef<OperandBundleDef> Bundles, int NumOperands,
3890 const Twine &NameStr, Instruction *InsertBefore)
3891 : CallBase(Ty->getReturnType(), Instruction::Invoke,
3892 OperandTraits<CallBase>::op_end(this) - NumOperands, NumOperands,
3893 InsertBefore) {
3894 init(Ty, Func, IfNormal, IfException, Args, Bundles, NameStr);
3895}
3896
3897InvokeInst::InvokeInst(FunctionType *Ty, Value *Func, BasicBlock *IfNormal,
3898 BasicBlock *IfException, ArrayRef<Value *> Args,
3899 ArrayRef<OperandBundleDef> Bundles, int NumOperands,
3900 const Twine &NameStr, BasicBlock *InsertAtEnd)
3901 : CallBase(Ty->getReturnType(), Instruction::Invoke,
3902 OperandTraits<CallBase>::op_end(this) - NumOperands, NumOperands,
3903 InsertAtEnd) {
3904 init(Ty, Func, IfNormal, IfException, Args, Bundles, NameStr);
3905}
3906
3907//===----------------------------------------------------------------------===//
3908// CallBrInst Class
3909//===----------------------------------------------------------------------===//
3910
3911/// CallBr instruction, tracking function calls that may not return control but
3912/// instead transfer it to a third location. The SubclassData field is used to
3913/// hold the calling convention of the call.
3914///
3915class CallBrInst : public CallBase {
3916
3917 unsigned NumIndirectDests;
3918
3919 CallBrInst(const CallBrInst &BI);
3920
3921 /// Construct a CallBrInst given a range of arguments.
3922 ///
3923 /// Construct a CallBrInst from a range of arguments
3924 inline CallBrInst(FunctionType *Ty, Value *Func, BasicBlock *DefaultDest,
3925 ArrayRef<BasicBlock *> IndirectDests,
3926 ArrayRef<Value *> Args,
3927 ArrayRef<OperandBundleDef> Bundles, int NumOperands,
3928 const Twine &NameStr, Instruction *InsertBefore);
3929
3930 inline CallBrInst(FunctionType *Ty, Value *Func, BasicBlock *DefaultDest,
3931 ArrayRef<BasicBlock *> IndirectDests,
3932 ArrayRef<Value *> Args,
3933 ArrayRef<OperandBundleDef> Bundles, int NumOperands,
3934 const Twine &NameStr, BasicBlock *InsertAtEnd);
3935
3936 void init(FunctionType *FTy, Value *Func, BasicBlock *DefaultDest,
3937 ArrayRef<BasicBlock *> IndirectDests, ArrayRef<Value *> Args,
3938 ArrayRef<OperandBundleDef> Bundles, const Twine &NameStr);
3939
3940 /// Should the Indirect Destinations change, scan + update the Arg list.
3941 void updateArgBlockAddresses(unsigned i, BasicBlock *B);
3942
3943 /// Compute the number of operands to allocate.
3944 static int ComputeNumOperands(int NumArgs, int NumIndirectDests,
3945 int NumBundleInputs = 0) {
3946 // We need one operand for the called function, plus our extra operands and
3947 // the input operand counts provided.
3948 return 2 + NumIndirectDests + NumArgs + NumBundleInputs;
3949 }
3950
3951protected:
3952 // Note: Instruction needs to be a friend here to call cloneImpl.
3953 friend class Instruction;
3954
3955 CallBrInst *cloneImpl() const;
3956
3957public:
3958 static CallBrInst *Create(FunctionType *Ty, Value *Func,
3959 BasicBlock *DefaultDest,
3960 ArrayRef<BasicBlock *> IndirectDests,
3961 ArrayRef<Value *> Args, const Twine &NameStr,
3962 Instruction *InsertBefore = nullptr) {
3963 int NumOperands = ComputeNumOperands(Args.size(), IndirectDests.size());
3964 return new (NumOperands)
3965 CallBrInst(Ty, Func, DefaultDest, IndirectDests, Args, None,
3966 NumOperands, NameStr, InsertBefore);
3967 }
3968
3969 static CallBrInst *Create(FunctionType *Ty, Value *Func,
3970 BasicBlock *DefaultDest,
3971 ArrayRef<BasicBlock *> IndirectDests,
3972 ArrayRef<Value *> Args,
3973 ArrayRef<OperandBundleDef> Bundles = None,
3974 const Twine &NameStr = "",
3975 Instruction *InsertBefore = nullptr) {
3976 int NumOperands = ComputeNumOperands(Args.size(), IndirectDests.size(),
3977 CountBundleInputs(Bundles));
3978 unsigned DescriptorBytes = Bundles.size() * sizeof(BundleOpInfo);
3979
3980 return new (NumOperands, DescriptorBytes)
3981 CallBrInst(Ty, Func, DefaultDest, IndirectDests, Args, Bundles,
3982 NumOperands, NameStr, InsertBefore);
3983 }
3984
3985 static CallBrInst *Create(FunctionType *Ty, Value *Func,
3986 BasicBlock *DefaultDest,
3987 ArrayRef<BasicBlock *> IndirectDests,
3988 ArrayRef<Value *> Args, const Twine &NameStr,
3989 BasicBlock *InsertAtEnd) {
3990 int NumOperands = ComputeNumOperands(Args.size(), IndirectDests.size());
3991 return new (NumOperands)
3992 CallBrInst(Ty, Func, DefaultDest, IndirectDests, Args, None,
3993 NumOperands, NameStr, InsertAtEnd);
3994 }
3995
3996 static CallBrInst *Create(FunctionType *Ty, Value *Func,
3997 BasicBlock *DefaultDest,
3998 ArrayRef<BasicBlock *> IndirectDests,
3999 ArrayRef<Value *> Args,
4000 ArrayRef<OperandBundleDef> Bundles,
4001 const Twine &NameStr, BasicBlock *InsertAtEnd) {
4002 int NumOperands = ComputeNumOperands(Args.size(), IndirectDests.size(),
4003 CountBundleInputs(Bundles));
4004 unsigned DescriptorBytes = Bundles.size() * sizeof(BundleOpInfo);
4005
4006 return new (NumOperands, DescriptorBytes)
4007 CallBrInst(Ty, Func, DefaultDest, IndirectDests, Args, Bundles,
4008 NumOperands, NameStr, InsertAtEnd);
4009 }
4010
4011 static CallBrInst *Create(FunctionCallee Func, BasicBlock *DefaultDest,
4012 ArrayRef<BasicBlock *> IndirectDests,
4013 ArrayRef<Value *> Args, const Twine &NameStr,
4014 Instruction *InsertBefore = nullptr) {
4015 return Create(Func.getFunctionType(), Func.getCallee(), DefaultDest,
4016 IndirectDests, Args, NameStr, InsertBefore);
4017 }
4018
4019 static CallBrInst *Create(FunctionCallee Func, BasicBlock *DefaultDest,
4020 ArrayRef<BasicBlock *> IndirectDests,
4021 ArrayRef<Value *> Args,
4022 ArrayRef<OperandBundleDef> Bundles = None,
4023 const Twine &NameStr = "",
4024 Instruction *InsertBefore = nullptr) {
4025 return Create(Func.getFunctionType(), Func.getCallee(), DefaultDest,
4026 IndirectDests, Args, Bundles, NameStr, InsertBefore);
4027 }
4028
4029 static CallBrInst *Create(FunctionCallee Func, BasicBlock *DefaultDest,
4030 ArrayRef<BasicBlock *> IndirectDests,
4031 ArrayRef<Value *> Args, const Twine &NameStr,
4032 BasicBlock *InsertAtEnd) {
4033 return Create(Func.getFunctionType(), Func.getCallee(), DefaultDest,
4034 IndirectDests, Args, NameStr, InsertAtEnd);
4035 }
4036
4037 static CallBrInst *Create(FunctionCallee Func,
4038 BasicBlock *DefaultDest,
4039 ArrayRef<BasicBlock *> IndirectDests,
4040 ArrayRef<Value *> Args,
4041 ArrayRef<OperandBundleDef> Bundles,
4042 const Twine &NameStr, BasicBlock *InsertAtEnd) {
4043 return Create(Func.getFunctionType(), Func.getCallee(), DefaultDest,
4044 IndirectDests, Args, Bundles, NameStr, InsertAtEnd);
4045 }
4046
4047 /// Create a clone of \p CBI with a different set of operand bundles and
4048 /// insert it before \p InsertPt.
4049 ///
4050 /// The returned callbr instruction is identical to \p CBI in every way
4051 /// except that the operand bundles for the new instruction are set to the
4052 /// operand bundles in \p Bundles.
4053 static CallBrInst *Create(CallBrInst *CBI,
4054 ArrayRef<OperandBundleDef> Bundles,
4055 Instruction *InsertPt = nullptr);
4056
4057 /// Return the number of callbr indirect dest labels.
4058 ///
4059 unsigned getNumIndirectDests() const { return NumIndirectDests; }
4060
4061 /// getIndirectDestLabel - Return the i-th indirect dest label.
4062 ///
4063 Value *getIndirectDestLabel(unsigned i) const {
4064 assert(i < getNumIndirectDests() && "Out of bounds!")((i < getNumIndirectDests() && "Out of bounds!") ?
static_cast<void> (0) : __assert_fail ("i < getNumIndirectDests() && \"Out of bounds!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 4064, __PRETTY_FUNCTION__))
;
4065 return getOperand(i + getNumArgOperands() + getNumTotalBundleOperands() +
4066 1);
4067 }
4068
4069 Value *getIndirectDestLabelUse(unsigned i) const {
4070 assert(i < getNumIndirectDests() && "Out of bounds!")((i < getNumIndirectDests() && "Out of bounds!") ?
static_cast<void> (0) : __assert_fail ("i < getNumIndirectDests() && \"Out of bounds!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 4070, __PRETTY_FUNCTION__))
;
4071 return getOperandUse(i + getNumArgOperands() + getNumTotalBundleOperands() +
4072 1);
4073 }
4074
4075 // Return the destination basic blocks...
4076 BasicBlock *getDefaultDest() const {
4077 return cast<BasicBlock>(*(&Op<-1>() - getNumIndirectDests() - 1));
4078 }
4079 BasicBlock *getIndirectDest(unsigned i) const {
4080 return cast_or_null<BasicBlock>(*(&Op<-1>() - getNumIndirectDests() + i));
4081 }
4082 SmallVector<BasicBlock *, 16> getIndirectDests() const {
4083 SmallVector<BasicBlock *, 16> IndirectDests;
4084 for (unsigned i = 0, e = getNumIndirectDests(); i < e; ++i)
4085 IndirectDests.push_back(getIndirectDest(i));
4086 return IndirectDests;
4087 }
4088 void setDefaultDest(BasicBlock *B) {
4089 *(&Op<-1>() - getNumIndirectDests() - 1) = reinterpret_cast<Value *>(B);
4090 }
4091 void setIndirectDest(unsigned i, BasicBlock *B) {
4092 updateArgBlockAddresses(i, B);
4093 *(&Op<-1>() - getNumIndirectDests() + i) = reinterpret_cast<Value *>(B);
4094 }
4095
4096 BasicBlock *getSuccessor(unsigned i) const {
4097 assert(i < getNumSuccessors() + 1 &&((i < getNumSuccessors() + 1 && "Successor # out of range for callbr!"
) ? static_cast<void> (0) : __assert_fail ("i < getNumSuccessors() + 1 && \"Successor # out of range for callbr!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 4098, __PRETTY_FUNCTION__))
4098 "Successor # out of range for callbr!")((i < getNumSuccessors() + 1 && "Successor # out of range for callbr!"
) ? static_cast<void> (0) : __assert_fail ("i < getNumSuccessors() + 1 && \"Successor # out of range for callbr!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 4098, __PRETTY_FUNCTION__))
;
4099 return i == 0 ? getDefaultDest() : getIndirectDest(i - 1);
4100 }
4101
4102 void setSuccessor(unsigned i, BasicBlock *NewSucc) {
4103 assert(i < getNumIndirectDests() + 1 &&((i < getNumIndirectDests() + 1 && "Successor # out of range for callbr!"
) ? static_cast<void> (0) : __assert_fail ("i < getNumIndirectDests() + 1 && \"Successor # out of range for callbr!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 4104, __PRETTY_FUNCTION__))
4104 "Successor # out of range for callbr!")((i < getNumIndirectDests() + 1 && "Successor # out of range for callbr!"
) ? static_cast<void> (0) : __assert_fail ("i < getNumIndirectDests() + 1 && \"Successor # out of range for callbr!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 4104, __PRETTY_FUNCTION__))
;
4105 return i == 0 ? setDefaultDest(NewSucc) : setIndirectDest(i - 1, NewSucc);
4106 }
4107
4108 unsigned getNumSuccessors() const { return getNumIndirectDests() + 1; }
4109
4110 // Methods for support type inquiry through isa, cast, and dyn_cast:
4111 static bool classof(const Instruction *I) {
4112 return (I->getOpcode() == Instruction::CallBr);
4113 }
4114 static bool classof(const Value *V) {
4115 return isa<Instruction>(V) && classof(cast<Instruction>(V));
4116 }
4117
4118private:
4119 // Shadow Instruction::setInstructionSubclassData with a private forwarding
4120 // method so that subclasses cannot accidentally use it.
4121 template <typename Bitfield>
4122 void setSubclassData(typename Bitfield::Type Value) {
4123 Instruction::setSubclassData<Bitfield>(Value);
4124 }
4125};
4126
4127CallBrInst::CallBrInst(FunctionType *Ty, Value *Func, BasicBlock *DefaultDest,
4128 ArrayRef<BasicBlock *> IndirectDests,
4129 ArrayRef<Value *> Args,
4130 ArrayRef<OperandBundleDef> Bundles, int NumOperands,
4131 const Twine &NameStr, Instruction *InsertBefore)
4132 : CallBase(Ty->getReturnType(), Instruction::CallBr,
4133 OperandTraits<CallBase>::op_end(this) - NumOperands, NumOperands,
4134 InsertBefore) {
4135 init(Ty, Func, DefaultDest, IndirectDests, Args, Bundles, NameStr);
4136}
4137
4138CallBrInst::CallBrInst(FunctionType *Ty, Value *Func, BasicBlock *DefaultDest,
4139 ArrayRef<BasicBlock *> IndirectDests,
4140 ArrayRef<Value *> Args,
4141 ArrayRef<OperandBundleDef> Bundles, int NumOperands,
4142 const Twine &NameStr, BasicBlock *InsertAtEnd)
4143 : CallBase(Ty->getReturnType(), Instruction::CallBr,
4144 OperandTraits<CallBase>::op_end(this) - NumOperands, NumOperands,
4145 InsertAtEnd) {
4146 init(Ty, Func, DefaultDest, IndirectDests, Args, Bundles, NameStr);
4147}
4148
4149//===----------------------------------------------------------------------===//
4150// ResumeInst Class
4151//===----------------------------------------------------------------------===//
4152
4153//===---------------------------------------------------------------------------
4154/// Resume the propagation of an exception.
4155///
4156class ResumeInst : public Instruction {
4157 ResumeInst(const ResumeInst &RI);
4158
4159 explicit ResumeInst(Value *Exn, Instruction *InsertBefore=nullptr);
4160 ResumeInst(Value *Exn, BasicBlock *InsertAtEnd);
4161
4162protected:
4163 // Note: Instruction needs to be a friend here to call cloneImpl.
4164 friend class Instruction;
4165
4166 ResumeInst *cloneImpl() const;
4167
4168public:
4169 static ResumeInst *Create(Value *Exn, Instruction *InsertBefore = nullptr) {
4170 return new(1) ResumeInst(Exn, InsertBefore);
4171 }
4172
4173 static ResumeInst *Create(Value *Exn, BasicBlock *InsertAtEnd) {
4174 return new(1) ResumeInst(Exn, InsertAtEnd);
4175 }
4176
4177 /// Provide fast operand accessors
4178 DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value)public: inline Value *getOperand(unsigned) const; inline void
setOperand(unsigned, Value*); inline op_iterator op_begin();
inline const_op_iterator op_begin() const; inline op_iterator
op_end(); inline const_op_iterator op_end() const; protected
: template <int> inline Use &Op(); template <int
> inline const Use &Op() const; public: inline unsigned
getNumOperands() const
;
4179
4180 /// Convenience accessor.
4181 Value *getValue() const { return Op<0>(); }
4182
4183 unsigned getNumSuccessors() const { return 0; }
4184
4185 // Methods for support type inquiry through isa, cast, and dyn_cast:
4186 static bool classof(const Instruction *I) {
4187 return I->getOpcode() == Instruction::Resume;
4188 }
4189 static bool classof(const Value *V) {
4190 return isa<Instruction>(V) && classof(cast<Instruction>(V));
4191 }
4192
4193private:
4194 BasicBlock *getSuccessor(unsigned idx) const {
4195 llvm_unreachable("ResumeInst has no successors!")::llvm::llvm_unreachable_internal("ResumeInst has no successors!"
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 4195)
;
4196 }
4197
4198 void setSuccessor(unsigned idx, BasicBlock *NewSucc) {
4199 llvm_unreachable("ResumeInst has no successors!")::llvm::llvm_unreachable_internal("ResumeInst has no successors!"
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 4199)
;
4200 }
4201};
4202
4203template <>
4204struct OperandTraits<ResumeInst> :
4205 public FixedNumOperandTraits<ResumeInst, 1> {
4206};
4207
4208DEFINE_TRANSPARENT_OPERAND_ACCESSORS(ResumeInst, Value)ResumeInst::op_iterator ResumeInst::op_begin() { return OperandTraits
<ResumeInst>::op_begin(this); } ResumeInst::const_op_iterator
ResumeInst::op_begin() const { return OperandTraits<ResumeInst
>::op_begin(const_cast<ResumeInst*>(this)); } ResumeInst
::op_iterator ResumeInst::op_end() { return OperandTraits<
ResumeInst>::op_end(this); } ResumeInst::const_op_iterator
ResumeInst::op_end() const { return OperandTraits<ResumeInst
>::op_end(const_cast<ResumeInst*>(this)); } Value *ResumeInst
::getOperand(unsigned i_nocapture) const { ((i_nocapture <
OperandTraits<ResumeInst>::operands(this) && "getOperand() out of range!"
) ? static_cast<void> (0) : __assert_fail ("i_nocapture < OperandTraits<ResumeInst>::operands(this) && \"getOperand() out of range!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 4208, __PRETTY_FUNCTION__)); return cast_or_null<Value>
( OperandTraits<ResumeInst>::op_begin(const_cast<ResumeInst
*>(this))[i_nocapture].get()); } void ResumeInst::setOperand
(unsigned i_nocapture, Value *Val_nocapture) { ((i_nocapture <
OperandTraits<ResumeInst>::operands(this) && "setOperand() out of range!"
) ? static_cast<void> (0) : __assert_fail ("i_nocapture < OperandTraits<ResumeInst>::operands(this) && \"setOperand() out of range!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 4208, __PRETTY_FUNCTION__)); OperandTraits<ResumeInst>
::op_begin(this)[i_nocapture] = Val_nocapture; } unsigned ResumeInst
::getNumOperands() const { return OperandTraits<ResumeInst
>::operands(this); } template <int Idx_nocapture> Use
&ResumeInst::Op() { return this->OpFrom<Idx_nocapture
>(this); } template <int Idx_nocapture> const Use &
ResumeInst::Op() const { return this->OpFrom<Idx_nocapture
>(this); }
4209
4210//===----------------------------------------------------------------------===//
4211// CatchSwitchInst Class
4212//===----------------------------------------------------------------------===//
4213class CatchSwitchInst : public Instruction {
4214 using UnwindDestField = BoolBitfieldElementT<0>;
4215
4216 /// The number of operands actually allocated. NumOperands is
4217 /// the number actually in use.
4218 unsigned ReservedSpace;
4219
4220 // Operand[0] = Outer scope
4221 // Operand[1] = Unwind block destination
4222 // Operand[n] = BasicBlock to go to on match
4223 CatchSwitchInst(const CatchSwitchInst &CSI);
4224
4225 /// Create a new switch instruction, specifying a
4226 /// default destination. The number of additional handlers can be specified
4227 /// here to make memory allocation more efficient.
4228 /// This constructor can also autoinsert before another instruction.
4229 CatchSwitchInst(Value *ParentPad, BasicBlock *UnwindDest,
4230 unsigned NumHandlers, const Twine &NameStr,
4231 Instruction *InsertBefore);
4232
4233 /// Create a new switch instruction, specifying a
4234 /// default destination. The number of additional handlers can be specified
4235 /// here to make memory allocation more efficient.
4236 /// This constructor also autoinserts at the end of the specified BasicBlock.
4237 CatchSwitchInst(Value *ParentPad, BasicBlock *UnwindDest,
4238 unsigned NumHandlers, const Twine &NameStr,
4239 BasicBlock *InsertAtEnd);
4240
4241 // allocate space for exactly zero operands
4242 void *operator new(size_t s) { return User::operator new(s); }
4243
4244 void init(Value *ParentPad, BasicBlock *UnwindDest, unsigned NumReserved);
4245 void growOperands(unsigned Size);
4246
4247protected:
4248 // Note: Instruction needs to be a friend here to call cloneImpl.
4249 friend class Instruction;
4250
4251 CatchSwitchInst *cloneImpl() const;
4252
4253public:
4254 static CatchSwitchInst *Create(Value *ParentPad, BasicBlock *UnwindDest,
4255 unsigned NumHandlers,
4256 const Twine &NameStr = "",
4257 Instruction *InsertBefore = nullptr) {
4258 return new CatchSwitchInst(ParentPad, UnwindDest, NumHandlers, NameStr,
4259 InsertBefore);
4260 }
4261
4262 static CatchSwitchInst *Create(Value *ParentPad, BasicBlock *UnwindDest,
4263 unsigned NumHandlers, const Twine &NameStr,
4264 BasicBlock *InsertAtEnd) {
4265 return new CatchSwitchInst(ParentPad, UnwindDest, NumHandlers, NameStr,
4266 InsertAtEnd);
4267 }
4268
4269 /// Provide fast operand accessors
4270 DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value)public: inline Value *getOperand(unsigned) const; inline void
setOperand(unsigned, Value*); inline op_iterator op_begin();
inline const_op_iterator op_begin() const; inline op_iterator
op_end(); inline const_op_iterator op_end() const; protected
: template <int> inline Use &Op(); template <int
> inline const Use &Op() const; public: inline unsigned
getNumOperands() const
;
4271
4272 // Accessor Methods for CatchSwitch stmt
4273 Value *getParentPad() const { return getOperand(0); }
4274 void setParentPad(Value *ParentPad) { setOperand(0, ParentPad); }
4275
4276 // Accessor Methods for CatchSwitch stmt
4277 bool hasUnwindDest() const { return getSubclassData<UnwindDestField>(); }
4278 bool unwindsToCaller() const { return !hasUnwindDest(); }
4279 BasicBlock *getUnwindDest() const {
4280 if (hasUnwindDest())
4281 return cast<BasicBlock>(getOperand(1));
4282 return nullptr;
4283 }
4284 void setUnwindDest(BasicBlock *UnwindDest) {
4285 assert(UnwindDest)((UnwindDest) ? static_cast<void> (0) : __assert_fail (
"UnwindDest", "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 4285, __PRETTY_FUNCTION__))
;
4286 assert(hasUnwindDest())((hasUnwindDest()) ? static_cast<void> (0) : __assert_fail
("hasUnwindDest()", "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 4286, __PRETTY_FUNCTION__))
;
4287 setOperand(1, UnwindDest);
4288 }
4289
4290 /// return the number of 'handlers' in this catchswitch
4291 /// instruction, except the default handler
4292 unsigned getNumHandlers() const {
4293 if (hasUnwindDest())
4294 return getNumOperands() - 2;
4295 return getNumOperands() - 1;
4296 }
4297
4298private:
4299 static BasicBlock *handler_helper(Value *V) { return cast<BasicBlock>(V); }
4300 static const BasicBlock *handler_helper(const Value *V) {
4301 return cast<BasicBlock>(V);
4302 }
4303
4304public:
4305 using DerefFnTy = BasicBlock *(*)(Value *);
4306 using handler_iterator = mapped_iterator<op_iterator, DerefFnTy>;
4307 using handler_range = iterator_range<handler_iterator>;
4308 using ConstDerefFnTy = const BasicBlock *(*)(const Value *);
4309 using const_handler_iterator =
4310 mapped_iterator<const_op_iterator, ConstDerefFnTy>;
4311 using const_handler_range = iterator_range<const_handler_iterator>;
4312
4313 /// Returns an iterator that points to the first handler in CatchSwitchInst.
4314 handler_iterator handler_begin() {
4315 op_iterator It = op_begin() + 1;
4316 if (hasUnwindDest())
4317 ++It;
4318 return handler_iterator(It, DerefFnTy(handler_helper));
4319 }
4320
4321 /// Returns an iterator that points to the first handler in the
4322 /// CatchSwitchInst.
4323 const_handler_iterator handler_begin() const {
4324 const_op_iterator It = op_begin() + 1;
4325 if (hasUnwindDest())
4326 ++It;
4327 return const_handler_iterator(It, ConstDerefFnTy(handler_helper));
4328 }
4329
4330 /// Returns a read-only iterator that points one past the last
4331 /// handler in the CatchSwitchInst.
4332 handler_iterator handler_end() {
4333 return handler_iterator(op_end(), DerefFnTy(handler_helper));
4334 }
4335
4336 /// Returns an iterator that points one past the last handler in the
4337 /// CatchSwitchInst.
4338 const_handler_iterator handler_end() const {
4339 return const_handler_iterator(op_end(), ConstDerefFnTy(handler_helper));
4340 }
4341
4342 /// iteration adapter for range-for loops.
4343 handler_range handlers() {
4344 return make_range(handler_begin(), handler_end());
4345 }
4346
4347 /// iteration adapter for range-for loops.
4348 const_handler_range handlers() const {
4349 return make_range(handler_begin(), handler_end());
4350 }
4351
4352 /// Add an entry to the switch instruction...
4353 /// Note:
4354 /// This action invalidates handler_end(). Old handler_end() iterator will
4355 /// point to the added handler.
4356 void addHandler(BasicBlock *Dest);
4357
4358 void removeHandler(handler_iterator HI);
4359
4360 unsigned getNumSuccessors() const { return getNumOperands() - 1; }
4361 BasicBlock *getSuccessor(unsigned Idx) const {
4362 assert(Idx < getNumSuccessors() &&((Idx < getNumSuccessors() && "Successor # out of range for catchswitch!"
) ? static_cast<void> (0) : __assert_fail ("Idx < getNumSuccessors() && \"Successor # out of range for catchswitch!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 4363, __PRETTY_FUNCTION__))
4363 "Successor # out of range for catchswitch!")((Idx < getNumSuccessors() && "Successor # out of range for catchswitch!"
) ? static_cast<void> (0) : __assert_fail ("Idx < getNumSuccessors() && \"Successor # out of range for catchswitch!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 4363, __PRETTY_FUNCTION__))
;
4364 return cast<BasicBlock>(getOperand(Idx + 1));
4365 }
4366 void setSuccessor(unsigned Idx, BasicBlock *NewSucc) {
4367 assert(Idx < getNumSuccessors() &&((Idx < getNumSuccessors() && "Successor # out of range for catchswitch!"
) ? static_cast<void> (0) : __assert_fail ("Idx < getNumSuccessors() && \"Successor # out of range for catchswitch!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 4368, __PRETTY_FUNCTION__))
4368 "Successor # out of range for catchswitch!")((Idx < getNumSuccessors() && "Successor # out of range for catchswitch!"
) ? static_cast<void> (0) : __assert_fail ("Idx < getNumSuccessors() && \"Successor # out of range for catchswitch!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 4368, __PRETTY_FUNCTION__))
;
4369 setOperand(Idx + 1, NewSucc);
4370 }
4371
4372 // Methods for support type inquiry through isa, cast, and dyn_cast:
4373 static bool classof(const Instruction *I) {
4374 return I->getOpcode() == Instruction::CatchSwitch;
4375 }
4376 static bool classof(const Value *V) {
4377 return isa<Instruction>(V) && classof(cast<Instruction>(V));
4378 }
4379};
4380
4381template <>
4382struct OperandTraits<CatchSwitchInst> : public HungoffOperandTraits<2> {};
4383
4384DEFINE_TRANSPARENT_OPERAND_ACCESSORS(CatchSwitchInst, Value)CatchSwitchInst::op_iterator CatchSwitchInst::op_begin() { return
OperandTraits<CatchSwitchInst>::op_begin(this); } CatchSwitchInst
::const_op_iterator CatchSwitchInst::op_begin() const { return
OperandTraits<CatchSwitchInst>::op_begin(const_cast<
CatchSwitchInst*>(this)); } CatchSwitchInst::op_iterator CatchSwitchInst
::op_end() { return OperandTraits<CatchSwitchInst>::op_end
(this); } CatchSwitchInst::const_op_iterator CatchSwitchInst::
op_end() const { return OperandTraits<CatchSwitchInst>::
op_end(const_cast<CatchSwitchInst*>(this)); } Value *CatchSwitchInst
::getOperand(unsigned i_nocapture) const { ((i_nocapture <
OperandTraits<CatchSwitchInst>::operands(this) &&
"getOperand() out of range!") ? static_cast<void> (0) :
__assert_fail ("i_nocapture < OperandTraits<CatchSwitchInst>::operands(this) && \"getOperand() out of range!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 4384, __PRETTY_FUNCTION__)); return cast_or_null<Value>
( OperandTraits<CatchSwitchInst>::op_begin(const_cast<
CatchSwitchInst*>(this))[i_nocapture].get()); } void CatchSwitchInst
::setOperand(unsigned i_nocapture, Value *Val_nocapture) { ((
i_nocapture < OperandTraits<CatchSwitchInst>::operands
(this) && "setOperand() out of range!") ? static_cast
<void> (0) : __assert_fail ("i_nocapture < OperandTraits<CatchSwitchInst>::operands(this) && \"setOperand() out of range!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 4384, __PRETTY_FUNCTION__)); OperandTraits<CatchSwitchInst
>::op_begin(this)[i_nocapture] = Val_nocapture; } unsigned
CatchSwitchInst::getNumOperands() const { return OperandTraits
<CatchSwitchInst>::operands(this); } template <int Idx_nocapture
> Use &CatchSwitchInst::Op() { return this->OpFrom<
Idx_nocapture>(this); } template <int Idx_nocapture>
const Use &CatchSwitchInst::Op() const { return this->
OpFrom<Idx_nocapture>(this); }
4385
4386//===----------------------------------------------------------------------===//
4387// CleanupPadInst Class
4388//===----------------------------------------------------------------------===//
4389class CleanupPadInst : public FuncletPadInst {
4390private:
4391 explicit CleanupPadInst(Value *ParentPad, ArrayRef<Value *> Args,
4392 unsigned Values, const Twine &NameStr,
4393 Instruction *InsertBefore)
4394 : FuncletPadInst(Instruction::CleanupPad, ParentPad, Args, Values,
4395 NameStr, InsertBefore) {}
4396 explicit CleanupPadInst(Value *ParentPad, ArrayRef<Value *> Args,
4397 unsigned Values, const Twine &NameStr,
4398 BasicBlock *InsertAtEnd)
4399 : FuncletPadInst(Instruction::CleanupPad, ParentPad, Args, Values,
4400 NameStr, InsertAtEnd) {}
4401
4402public:
4403 static CleanupPadInst *Create(Value *ParentPad, ArrayRef<Value *> Args = None,
4404 const Twine &NameStr = "",
4405 Instruction *InsertBefore = nullptr) {
4406 unsigned Values = 1 + Args.size();
4407 return new (Values)
4408 CleanupPadInst(ParentPad, Args, Values, NameStr, InsertBefore);
4409 }
4410
4411 static CleanupPadInst *Create(Value *ParentPad, ArrayRef<Value *> Args,
4412 const Twine &NameStr, BasicBlock *InsertAtEnd) {
4413 unsigned Values = 1 + Args.size();
4414 return new (Values)
4415 CleanupPadInst(ParentPad, Args, Values, NameStr, InsertAtEnd);
4416 }
4417
4418 /// Methods for support type inquiry through isa, cast, and dyn_cast:
4419 static bool classof(const Instruction *I) {
4420 return I->getOpcode() == Instruction::CleanupPad;
4421 }
4422 static bool classof(const Value *V) {
4423 return isa<Instruction>(V) && classof(cast<Instruction>(V));
4424 }
4425};
4426
4427//===----------------------------------------------------------------------===//
4428// CatchPadInst Class
4429//===----------------------------------------------------------------------===//
4430class CatchPadInst : public FuncletPadInst {
4431private:
4432 explicit CatchPadInst(Value *CatchSwitch, ArrayRef<Value *> Args,
4433 unsigned Values, const Twine &NameStr,
4434 Instruction *InsertBefore)
4435 : FuncletPadInst(Instruction::CatchPad, CatchSwitch, Args, Values,
4436 NameStr, InsertBefore) {}
4437 explicit CatchPadInst(Value *CatchSwitch, ArrayRef<Value *> Args,
4438 unsigned Values, const Twine &NameStr,
4439 BasicBlock *InsertAtEnd)
4440 : FuncletPadInst(Instruction::CatchPad, CatchSwitch, Args, Values,
4441 NameStr, InsertAtEnd) {}
4442
4443public:
4444 static CatchPadInst *Create(Value *CatchSwitch, ArrayRef<Value *> Args,
4445 const Twine &NameStr = "",
4446 Instruction *InsertBefore = nullptr) {
4447 unsigned Values = 1 + Args.size();
4448 return new (Values)
4449 CatchPadInst(CatchSwitch, Args, Values, NameStr, InsertBefore);
4450 }
4451
4452 static CatchPadInst *Create(Value *CatchSwitch, ArrayRef<Value *> Args,
4453 const Twine &NameStr, BasicBlock *InsertAtEnd) {
4454 unsigned Values = 1 + Args.size();
4455 return new (Values)
4456 CatchPadInst(CatchSwitch, Args, Values, NameStr, InsertAtEnd);
4457 }
4458
4459 /// Convenience accessors
4460 CatchSwitchInst *getCatchSwitch() const {
4461 return cast<CatchSwitchInst>(Op<-1>());
4462 }
4463 void setCatchSwitch(Value *CatchSwitch) {
4464 assert(CatchSwitch)((CatchSwitch) ? static_cast<void> (0) : __assert_fail (
"CatchSwitch", "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 4464, __PRETTY_FUNCTION__))
;
4465 Op<-1>() = CatchSwitch;
4466 }
4467
4468 /// Methods for support type inquiry through isa, cast, and dyn_cast:
4469 static bool classof(const Instruction *I) {
4470 return I->getOpcode() == Instruction::CatchPad;
4471 }
4472 static bool classof(const Value *V) {
4473 return isa<Instruction>(V) && classof(cast<Instruction>(V));
4474 }
4475};
4476
4477//===----------------------------------------------------------------------===//
4478// CatchReturnInst Class
4479//===----------------------------------------------------------------------===//
4480
4481class CatchReturnInst : public Instruction {
4482 CatchReturnInst(const CatchReturnInst &RI);
4483 CatchReturnInst(Value *CatchPad, BasicBlock *BB, Instruction *InsertBefore);
4484 CatchReturnInst(Value *CatchPad, BasicBlock *BB, BasicBlock *InsertAtEnd);
4485
4486 void init(Value *CatchPad, BasicBlock *BB);
4487
4488protected:
4489 // Note: Instruction needs to be a friend here to call cloneImpl.
4490 friend class Instruction;
4491
4492 CatchReturnInst *cloneImpl() const;
4493
4494public:
4495 static CatchReturnInst *Create(Value *CatchPad, BasicBlock *BB,
4496 Instruction *InsertBefore = nullptr) {
4497 assert(CatchPad)((CatchPad) ? static_cast<void> (0) : __assert_fail ("CatchPad"
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 4497, __PRETTY_FUNCTION__))
;
4498 assert(BB)((BB) ? static_cast<void> (0) : __assert_fail ("BB", "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/include/llvm/IR/Instructions.h"
, 4498, __PRETTY_FUNCTION__))
;
4499 return new (2) CatchReturnInst(CatchPad, BB,