Bug Summary

File:llvm/utils/TableGen/DAGISelMatcherEmitter.cpp
Warning:line 1124, column 12
Value stored to 'TotalSize' during its initialization is never read

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 DAGISelMatcherEmitter.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~++20210125100614+2cdb34efdac5/build-llvm/utils/TableGen -I /build/llvm-toolchain-snapshot-12~++20210125100614+2cdb34efdac5/llvm/utils/TableGen -I /build/llvm-toolchain-snapshot-12~++20210125100614+2cdb34efdac5/build-llvm/include -I /build/llvm-toolchain-snapshot-12~++20210125100614+2cdb34efdac5/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~++20210125100614+2cdb34efdac5/build-llvm/utils/TableGen -fdebug-prefix-map=/build/llvm-toolchain-snapshot-12~++20210125100614+2cdb34efdac5=. -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-2021-01-26-035717-31997-1 -x c++ /build/llvm-toolchain-snapshot-12~++20210125100614+2cdb34efdac5/llvm/utils/TableGen/DAGISelMatcherEmitter.cpp
1//===- DAGISelMatcherEmitter.cpp - Matcher Emitter ------------------------===//
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 contains code to generate C++ code for a matcher.
10//
11//===----------------------------------------------------------------------===//
12
13#include "CodeGenDAGPatterns.h"
14#include "DAGISelMatcher.h"
15#include "llvm/ADT/DenseMap.h"
16#include "llvm/ADT/StringMap.h"
17#include "llvm/ADT/MapVector.h"
18#include "llvm/ADT/SmallString.h"
19#include "llvm/ADT/StringMap.h"
20#include "llvm/ADT/TinyPtrVector.h"
21#include "llvm/Support/CommandLine.h"
22#include "llvm/Support/Format.h"
23#include "llvm/Support/SourceMgr.h"
24#include "llvm/TableGen/Error.h"
25#include "llvm/TableGen/Record.h"
26
27using namespace llvm;
28
29enum {
30 IndexWidth = 6,
31 FullIndexWidth = IndexWidth + 4,
32 HistOpcWidth = 40,
33};
34
35cl::OptionCategory DAGISelCat("Options for -gen-dag-isel");
36
37// To reduce generated source code size.
38static cl::opt<bool> OmitComments("omit-comments",
39 cl::desc("Do not generate comments"),
40 cl::init(false), cl::cat(DAGISelCat));
41
42static cl::opt<bool> InstrumentCoverage(
43 "instrument-coverage",
44 cl::desc("Generates tables to help identify patterns matched"),
45 cl::init(false), cl::cat(DAGISelCat));
46
47namespace {
48class MatcherTableEmitter {
49 const CodeGenDAGPatterns &CGP;
50
51 SmallVector<unsigned, Matcher::HighestKind+1> OpcodeCounts;
52
53 DenseMap<TreePattern *, unsigned> NodePredicateMap;
54 std::vector<TreePredicateFn> NodePredicates;
55 std::vector<TreePredicateFn> NodePredicatesWithOperands;
56
57 // We de-duplicate the predicates by code string, and use this map to track
58 // all the patterns with "identical" predicates.
59 StringMap<TinyPtrVector<TreePattern *>> NodePredicatesByCodeToRun;
60
61 StringMap<unsigned> PatternPredicateMap;
62 std::vector<std::string> PatternPredicates;
63
64 DenseMap<const ComplexPattern*, unsigned> ComplexPatternMap;
65 std::vector<const ComplexPattern*> ComplexPatterns;
66
67
68 DenseMap<Record*, unsigned> NodeXFormMap;
69 std::vector<Record*> NodeXForms;
70
71 std::vector<std::string> VecIncludeStrings;
72 MapVector<std::string, unsigned, StringMap<unsigned> > VecPatterns;
73
74 unsigned getPatternIdxFromTable(std::string &&P, std::string &&include_loc) {
75 const auto It = VecPatterns.find(P);
76 if (It == VecPatterns.end()) {
77 VecPatterns.insert(make_pair(std::move(P), VecPatterns.size()));
78 VecIncludeStrings.push_back(std::move(include_loc));
79 return VecIncludeStrings.size() - 1;
80 }
81 return It->second;
82 }
83
84public:
85 MatcherTableEmitter(const CodeGenDAGPatterns &cgp) : CGP(cgp) {
86 OpcodeCounts.assign(Matcher::HighestKind+1, 0);
87 }
88
89 unsigned EmitMatcherList(const Matcher *N, const unsigned Indent,
90 unsigned StartIdx, raw_ostream &OS);
91
92 unsigned SizeMatcherList(Matcher *N, raw_ostream &OS);
93
94 void EmitPredicateFunctions(raw_ostream &OS);
95
96 void EmitHistogram(const Matcher *N, raw_ostream &OS);
97
98 void EmitPatternMatchTable(raw_ostream &OS);
99
100private:
101 void EmitNodePredicatesFunction(const std::vector<TreePredicateFn> &Preds,
102 StringRef Decl, raw_ostream &OS);
103
104 unsigned SizeMatcher(Matcher *N, raw_ostream &OS);
105
106 unsigned EmitMatcher(const Matcher *N, const unsigned Indent, unsigned CurrentIdx,
107 raw_ostream &OS);
108
109 unsigned getNodePredicate(TreePredicateFn Pred) {
110 TreePattern *TP = Pred.getOrigPatFragRecord();
111 unsigned &Entry = NodePredicateMap[TP];
112 if (Entry == 0) {
113 TinyPtrVector<TreePattern *> &SameCodePreds =
114 NodePredicatesByCodeToRun[Pred.getCodeToRunOnSDNode()];
115 if (SameCodePreds.empty()) {
116 // We've never seen a predicate with the same code: allocate an entry.
117 if (Pred.usesOperands()) {
118 NodePredicatesWithOperands.push_back(Pred);
119 Entry = NodePredicatesWithOperands.size();
120 } else {
121 NodePredicates.push_back(Pred);
122 Entry = NodePredicates.size();
123 }
124 } else {
125 // We did see an identical predicate: re-use it.
126 Entry = NodePredicateMap[SameCodePreds.front()];
127 assert(Entry != 0)((Entry != 0) ? static_cast<void> (0) : __assert_fail (
"Entry != 0", "/build/llvm-toolchain-snapshot-12~++20210125100614+2cdb34efdac5/llvm/utils/TableGen/DAGISelMatcherEmitter.cpp"
, 127, __PRETTY_FUNCTION__))
;
128 assert(TreePredicateFn(SameCodePreds.front()).usesOperands() ==((TreePredicateFn(SameCodePreds.front()).usesOperands() == Pred
.usesOperands() && "PatFrags with some code must have same usesOperands setting"
) ? static_cast<void> (0) : __assert_fail ("TreePredicateFn(SameCodePreds.front()).usesOperands() == Pred.usesOperands() && \"PatFrags with some code must have same usesOperands setting\""
, "/build/llvm-toolchain-snapshot-12~++20210125100614+2cdb34efdac5/llvm/utils/TableGen/DAGISelMatcherEmitter.cpp"
, 130, __PRETTY_FUNCTION__))
129 Pred.usesOperands() &&((TreePredicateFn(SameCodePreds.front()).usesOperands() == Pred
.usesOperands() && "PatFrags with some code must have same usesOperands setting"
) ? static_cast<void> (0) : __assert_fail ("TreePredicateFn(SameCodePreds.front()).usesOperands() == Pred.usesOperands() && \"PatFrags with some code must have same usesOperands setting\""
, "/build/llvm-toolchain-snapshot-12~++20210125100614+2cdb34efdac5/llvm/utils/TableGen/DAGISelMatcherEmitter.cpp"
, 130, __PRETTY_FUNCTION__))
130 "PatFrags with some code must have same usesOperands setting")((TreePredicateFn(SameCodePreds.front()).usesOperands() == Pred
.usesOperands() && "PatFrags with some code must have same usesOperands setting"
) ? static_cast<void> (0) : __assert_fail ("TreePredicateFn(SameCodePreds.front()).usesOperands() == Pred.usesOperands() && \"PatFrags with some code must have same usesOperands setting\""
, "/build/llvm-toolchain-snapshot-12~++20210125100614+2cdb34efdac5/llvm/utils/TableGen/DAGISelMatcherEmitter.cpp"
, 130, __PRETTY_FUNCTION__))
;
131 }
132 // In both cases, we've never seen this particular predicate before, so
133 // mark it in the list of predicates sharing the same code.
134 SameCodePreds.push_back(TP);
135 }
136 return Entry-1;
137 }
138
139 unsigned getPatternPredicate(StringRef PredName) {
140 unsigned &Entry = PatternPredicateMap[PredName];
141 if (Entry == 0) {
142 PatternPredicates.push_back(PredName.str());
143 Entry = PatternPredicates.size();
144 }
145 return Entry-1;
146 }
147 unsigned getComplexPat(const ComplexPattern &P) {
148 unsigned &Entry = ComplexPatternMap[&P];
149 if (Entry == 0) {
150 ComplexPatterns.push_back(&P);
151 Entry = ComplexPatterns.size();
152 }
153 return Entry-1;
154 }
155
156 unsigned getNodeXFormID(Record *Rec) {
157 unsigned &Entry = NodeXFormMap[Rec];
158 if (Entry == 0) {
159 NodeXForms.push_back(Rec);
160 Entry = NodeXForms.size();
161 }
162 return Entry-1;
163 }
164
165};
166} // end anonymous namespace.
167
168static std::string GetPatFromTreePatternNode(const TreePatternNode *N) {
169 std::string str;
170 raw_string_ostream Stream(str);
171 Stream << *N;
172 Stream.str();
173 return str;
174}
175
176static size_t GetVBRSize(unsigned Val) {
177 if (Val <= 127) return 1;
178
179 unsigned NumBytes = 0;
180 while (Val >= 128) {
181 Val >>= 7;
182 ++NumBytes;
183 }
184 return NumBytes+1;
185}
186
187/// EmitVBRValue - Emit the specified value as a VBR, returning the number of
188/// bytes emitted.
189static uint64_t EmitVBRValue(uint64_t Val, raw_ostream &OS) {
190 if (Val <= 127) {
191 OS << Val << ", ";
192 return 1;
193 }
194
195 uint64_t InVal = Val;
196 unsigned NumBytes = 0;
197 while (Val >= 128) {
198 OS << (Val&127) << "|128,";
199 Val >>= 7;
200 ++NumBytes;
201 }
202 OS << Val;
203 if (!OmitComments)
204 OS << "/*" << InVal << "*/";
205 OS << ", ";
206 return NumBytes+1;
207}
208
209// This is expensive and slow.
210static std::string getIncludePath(const Record *R) {
211 std::string str;
212 raw_string_ostream Stream(str);
213 auto Locs = R->getLoc();
214 SMLoc L;
215 if (Locs.size() > 1) {
216 // Get where the pattern prototype was instantiated
217 L = Locs[1];
218 } else if (Locs.size() == 1) {
219 L = Locs[0];
220 }
221 unsigned CurBuf = SrcMgr.FindBufferContainingLoc(L);
222 assert(CurBuf && "Invalid or unspecified location!")((CurBuf && "Invalid or unspecified location!") ? static_cast
<void> (0) : __assert_fail ("CurBuf && \"Invalid or unspecified location!\""
, "/build/llvm-toolchain-snapshot-12~++20210125100614+2cdb34efdac5/llvm/utils/TableGen/DAGISelMatcherEmitter.cpp"
, 222, __PRETTY_FUNCTION__))
;
223
224 Stream << SrcMgr.getBufferInfo(CurBuf).Buffer->getBufferIdentifier() << ":"
225 << SrcMgr.FindLineNumber(L, CurBuf);
226 Stream.str();
227 return str;
228}
229
230/// This function traverses the matcher tree and sizes all the nodes
231/// that are children of the three kinds of nodes that have them.
232unsigned MatcherTableEmitter::
233SizeMatcherList(Matcher *N, raw_ostream &OS) {
234 unsigned Size = 0;
235 while (N) {
236 Size += SizeMatcher(N, OS);
237 N = N->getNext();
238 }
239 return Size;
240}
241
242/// This function sizes the children of the three kinds of nodes that
243/// have them. It does so by using special cases for those three
244/// nodes, but sharing the code in EmitMatcher() for the other kinds.
245unsigned MatcherTableEmitter::
246SizeMatcher(Matcher *N, raw_ostream &OS) {
247 unsigned Idx = 0;
248
249 ++OpcodeCounts[N->getKind()];
250 switch (N->getKind()) {
251 // The Scope matcher has its kind, a series of child size + child,
252 // and a trailing zero.
253 case Matcher::Scope: {
254 ScopeMatcher *SM = cast<ScopeMatcher>(N);
255 assert(SM->getNext() == nullptr && "Scope matcher should not have next")((SM->getNext() == nullptr && "Scope matcher should not have next"
) ? static_cast<void> (0) : __assert_fail ("SM->getNext() == nullptr && \"Scope matcher should not have next\""
, "/build/llvm-toolchain-snapshot-12~++20210125100614+2cdb34efdac5/llvm/utils/TableGen/DAGISelMatcherEmitter.cpp"
, 255, __PRETTY_FUNCTION__))
;
256 unsigned Size = 1; // Count the kind.
257 for (unsigned i = 0, e = SM->getNumChildren(); i != e; ++i) {
258 const size_t ChildSize = SizeMatcherList(SM->getChild(i), OS);
259 assert(ChildSize != 0 && "Matcher cannot have child of size 0")((ChildSize != 0 && "Matcher cannot have child of size 0"
) ? static_cast<void> (0) : __assert_fail ("ChildSize != 0 && \"Matcher cannot have child of size 0\""
, "/build/llvm-toolchain-snapshot-12~++20210125100614+2cdb34efdac5/llvm/utils/TableGen/DAGISelMatcherEmitter.cpp"
, 259, __PRETTY_FUNCTION__))
;
260 SM->getChild(i)->setSize(ChildSize);
261 Size += GetVBRSize(ChildSize) + ChildSize; // Count VBR and child size.
262 }
263 ++Size; // Count the zero sentinel.
264 return Size;
265 }
266
267 // SwitchOpcode and SwitchType have their kind, a series of child size +
268 // opcode/type + child, and a trailing zero.
269 case Matcher::SwitchOpcode:
270 case Matcher::SwitchType: {
271 unsigned Size = 1; // Count the kind.
272 unsigned NumCases;
273 if (const SwitchOpcodeMatcher *SOM = dyn_cast<SwitchOpcodeMatcher>(N))
274 NumCases = SOM->getNumCases();
275 else
276 NumCases = cast<SwitchTypeMatcher>(N)->getNumCases();
277 for (unsigned i = 0, e = NumCases; i != e; ++i) {
278 Matcher *Child;
279 if (SwitchOpcodeMatcher *SOM = dyn_cast<SwitchOpcodeMatcher>(N)) {
280 Child = SOM->getCaseMatcher(i);
281 Size += 2; // Count the child's opcode.
282 } else {
283 Child = cast<SwitchTypeMatcher>(N)->getCaseMatcher(i);
284 ++Size; // Count the child's type.
285 }
286 const size_t ChildSize = SizeMatcherList(Child, OS);
287 assert(ChildSize != 0 && "Matcher cannot have child of size 0")((ChildSize != 0 && "Matcher cannot have child of size 0"
) ? static_cast<void> (0) : __assert_fail ("ChildSize != 0 && \"Matcher cannot have child of size 0\""
, "/build/llvm-toolchain-snapshot-12~++20210125100614+2cdb34efdac5/llvm/utils/TableGen/DAGISelMatcherEmitter.cpp"
, 287, __PRETTY_FUNCTION__))
;
288 Child->setSize(ChildSize);
289 Size += GetVBRSize(ChildSize) + ChildSize; // Count VBR and child size.
290 }
291 ++Size; // Count the zero sentinel.
292 return Size;
293 }
294
295 default:
296 // Employ the matcher emitter to size other matchers.
297 return EmitMatcher(N, 0, Idx, OS);
298 }
299 llvm_unreachable("Unreachable")::llvm::llvm_unreachable_internal("Unreachable", "/build/llvm-toolchain-snapshot-12~++20210125100614+2cdb34efdac5/llvm/utils/TableGen/DAGISelMatcherEmitter.cpp"
, 299)
;
300}
301
302static void BeginEmitFunction(raw_ostream &OS, StringRef RetType,
303 StringRef Decl, bool AddOverride) {
304 OS << "#ifdef GET_DAGISEL_DECL\n";
305 OS << RetType << ' ' << Decl;
306 if (AddOverride)
307 OS << " override";
308 OS << ";\n"
309 "#endif\n"
310 "#if defined(GET_DAGISEL_BODY) || DAGISEL_INLINE\n";
311 OS << RetType << " DAGISEL_CLASS_COLONCOLON " << Decl << "\n";
312 if (AddOverride) {
313 OS << "#if DAGISEL_INLINE\n"
314 " override\n"
315 "#endif\n";
316 }
317}
318
319static void EndEmitFunction(raw_ostream &OS) {
320 OS << "#endif // GET_DAGISEL_BODY\n\n";
321}
322
323void MatcherTableEmitter::EmitPatternMatchTable(raw_ostream &OS) {
324
325 assert(isUInt<16>(VecPatterns.size()) &&((isUInt<16>(VecPatterns.size()) && "Using only 16 bits to encode offset into Pattern Table"
) ? static_cast<void> (0) : __assert_fail ("isUInt<16>(VecPatterns.size()) && \"Using only 16 bits to encode offset into Pattern Table\""
, "/build/llvm-toolchain-snapshot-12~++20210125100614+2cdb34efdac5/llvm/utils/TableGen/DAGISelMatcherEmitter.cpp"
, 326, __PRETTY_FUNCTION__))
326 "Using only 16 bits to encode offset into Pattern Table")((isUInt<16>(VecPatterns.size()) && "Using only 16 bits to encode offset into Pattern Table"
) ? static_cast<void> (0) : __assert_fail ("isUInt<16>(VecPatterns.size()) && \"Using only 16 bits to encode offset into Pattern Table\""
, "/build/llvm-toolchain-snapshot-12~++20210125100614+2cdb34efdac5/llvm/utils/TableGen/DAGISelMatcherEmitter.cpp"
, 326, __PRETTY_FUNCTION__))
;
327 assert(VecPatterns.size() == VecIncludeStrings.size() &&((VecPatterns.size() == VecIncludeStrings.size() && "The sizes of Pattern and include vectors should be the same"
) ? static_cast<void> (0) : __assert_fail ("VecPatterns.size() == VecIncludeStrings.size() && \"The sizes of Pattern and include vectors should be the same\""
, "/build/llvm-toolchain-snapshot-12~++20210125100614+2cdb34efdac5/llvm/utils/TableGen/DAGISelMatcherEmitter.cpp"
, 328, __PRETTY_FUNCTION__))
328 "The sizes of Pattern and include vectors should be the same")((VecPatterns.size() == VecIncludeStrings.size() && "The sizes of Pattern and include vectors should be the same"
) ? static_cast<void> (0) : __assert_fail ("VecPatterns.size() == VecIncludeStrings.size() && \"The sizes of Pattern and include vectors should be the same\""
, "/build/llvm-toolchain-snapshot-12~++20210125100614+2cdb34efdac5/llvm/utils/TableGen/DAGISelMatcherEmitter.cpp"
, 328, __PRETTY_FUNCTION__))
;
329
330 BeginEmitFunction(OS, "StringRef", "getPatternForIndex(unsigned Index)",
331 true/*AddOverride*/);
332 OS << "{\n";
333 OS << "static const char *PATTERN_MATCH_TABLE[] = {\n";
334
335 for (const auto &It : VecPatterns) {
336 OS << "\"" << It.first << "\",\n";
337 }
338
339 OS << "\n};";
340 OS << "\nreturn StringRef(PATTERN_MATCH_TABLE[Index]);";
341 OS << "\n}\n";
342 EndEmitFunction(OS);
343
344 BeginEmitFunction(OS, "StringRef", "getIncludePathForIndex(unsigned Index)",
345 true/*AddOverride*/);
346 OS << "{\n";
347 OS << "static const char *INCLUDE_PATH_TABLE[] = {\n";
348
349 for (const auto &It : VecIncludeStrings) {
350 OS << "\"" << It << "\",\n";
351 }
352
353 OS << "\n};";
354 OS << "\nreturn StringRef(INCLUDE_PATH_TABLE[Index]);";
355 OS << "\n}\n";
356 EndEmitFunction(OS);
357}
358
359/// EmitMatcher - Emit bytes for the specified matcher and return
360/// the number of bytes emitted.
361unsigned MatcherTableEmitter::
362EmitMatcher(const Matcher *N, const unsigned Indent, unsigned CurrentIdx,
363 raw_ostream &OS) {
364 OS.indent(Indent);
365
366 switch (N->getKind()) {
367 case Matcher::Scope: {
368 const ScopeMatcher *SM = cast<ScopeMatcher>(N);
369 unsigned StartIdx = CurrentIdx;
370
371 // Emit all of the children.
372 for (unsigned i = 0, e = SM->getNumChildren(); i != e; ++i) {
373 if (i == 0) {
374 OS << "OPC_Scope, ";
375 ++CurrentIdx;
376 } else {
377 if (!OmitComments) {
378 OS << "/*" << format_decimal(CurrentIdx, IndexWidth) << "*/";
379 OS.indent(Indent) << "/*Scope*/ ";
380 } else
381 OS.indent(Indent);
382 }
383
384 size_t ChildSize = SM->getChild(i)->getSize();
385 size_t VBRSize = GetVBRSize(ChildSize);
386 EmitVBRValue(ChildSize, OS);
387 if (!OmitComments) {
388 OS << "/*->" << CurrentIdx + VBRSize + ChildSize << "*/";
389 if (i == 0)
390 OS << " // " << SM->getNumChildren() << " children in Scope";
391 }
392 OS << '\n';
393
394 ChildSize = EmitMatcherList(SM->getChild(i), Indent+1,
395 CurrentIdx + VBRSize, OS);
396 assert(ChildSize == SM->getChild(i)->getSize() &&((ChildSize == SM->getChild(i)->getSize() && "Emitted child size does not match calculated size"
) ? static_cast<void> (0) : __assert_fail ("ChildSize == SM->getChild(i)->getSize() && \"Emitted child size does not match calculated size\""
, "/build/llvm-toolchain-snapshot-12~++20210125100614+2cdb34efdac5/llvm/utils/TableGen/DAGISelMatcherEmitter.cpp"
, 397, __PRETTY_FUNCTION__))
397 "Emitted child size does not match calculated size")((ChildSize == SM->getChild(i)->getSize() && "Emitted child size does not match calculated size"
) ? static_cast<void> (0) : __assert_fail ("ChildSize == SM->getChild(i)->getSize() && \"Emitted child size does not match calculated size\""
, "/build/llvm-toolchain-snapshot-12~++20210125100614+2cdb34efdac5/llvm/utils/TableGen/DAGISelMatcherEmitter.cpp"
, 397, __PRETTY_FUNCTION__))
;
398 CurrentIdx += VBRSize + ChildSize;
399 }
400
401 // Emit a zero as a sentinel indicating end of 'Scope'.
402 if (!OmitComments)
403 OS << "/*" << format_decimal(CurrentIdx, IndexWidth) << "*/";
404 OS.indent(Indent) << "0, ";
405 if (!OmitComments)
406 OS << "/*End of Scope*/";
407 OS << '\n';
408 return CurrentIdx - StartIdx + 1;
409 }
410
411 case Matcher::RecordNode:
412 OS << "OPC_RecordNode,";
413 if (!OmitComments)
414 OS << " // #"
415 << cast<RecordMatcher>(N)->getResultNo() << " = "
416 << cast<RecordMatcher>(N)->getWhatFor();
417 OS << '\n';
418 return 1;
419
420 case Matcher::RecordChild:
421 OS << "OPC_RecordChild" << cast<RecordChildMatcher>(N)->getChildNo()
422 << ',';
423 if (!OmitComments)
424 OS << " // #"
425 << cast<RecordChildMatcher>(N)->getResultNo() << " = "
426 << cast<RecordChildMatcher>(N)->getWhatFor();
427 OS << '\n';
428 return 1;
429
430 case Matcher::RecordMemRef:
431 OS << "OPC_RecordMemRef,\n";
432 return 1;
433
434 case Matcher::CaptureGlueInput:
435 OS << "OPC_CaptureGlueInput,\n";
436 return 1;
437
438 case Matcher::MoveChild: {
439 const auto *MCM = cast<MoveChildMatcher>(N);
440
441 OS << "OPC_MoveChild";
442 // Handle the specialized forms.
443 if (MCM->getChildNo() >= 8)
444 OS << ", ";
445 OS << MCM->getChildNo() << ",\n";
446 return (MCM->getChildNo() >= 8) ? 2 : 1;
447 }
448
449 case Matcher::MoveParent:
450 OS << "OPC_MoveParent,\n";
451 return 1;
452
453 case Matcher::CheckSame:
454 OS << "OPC_CheckSame, "
455 << cast<CheckSameMatcher>(N)->getMatchNumber() << ",\n";
456 return 2;
457
458 case Matcher::CheckChildSame:
459 OS << "OPC_CheckChild"
460 << cast<CheckChildSameMatcher>(N)->getChildNo() << "Same, "
461 << cast<CheckChildSameMatcher>(N)->getMatchNumber() << ",\n";
462 return 2;
463
464 case Matcher::CheckPatternPredicate: {
465 StringRef Pred =cast<CheckPatternPredicateMatcher>(N)->getPredicate();
466 OS << "OPC_CheckPatternPredicate, " << getPatternPredicate(Pred) << ',';
467 if (!OmitComments)
468 OS << " // " << Pred;
469 OS << '\n';
470 return 2;
471 }
472 case Matcher::CheckPredicate: {
473 TreePredicateFn Pred = cast<CheckPredicateMatcher>(N)->getPredicate();
474 unsigned OperandBytes = 0;
475
476 if (Pred.usesOperands()) {
477 unsigned NumOps = cast<CheckPredicateMatcher>(N)->getNumOperands();
478 OS << "OPC_CheckPredicateWithOperands, " << NumOps << "/*#Ops*/, ";
479 for (unsigned i = 0; i < NumOps; ++i)
480 OS << cast<CheckPredicateMatcher>(N)->getOperandNo(i) << ", ";
481 OperandBytes = 1 + NumOps;
482 } else {
483 OS << "OPC_CheckPredicate, ";
484 }
485
486 OS << getNodePredicate(Pred) << ',';
487 if (!OmitComments)
488 OS << " // " << Pred.getFnName();
489 OS << '\n';
490 return 2 + OperandBytes;
491 }
492
493 case Matcher::CheckOpcode:
494 OS << "OPC_CheckOpcode, TARGET_VAL("
495 << cast<CheckOpcodeMatcher>(N)->getOpcode().getEnumName() << "),\n";
496 return 3;
497
498 case Matcher::SwitchOpcode:
499 case Matcher::SwitchType: {
500 unsigned StartIdx = CurrentIdx;
501
502 unsigned NumCases;
503 if (const SwitchOpcodeMatcher *SOM = dyn_cast<SwitchOpcodeMatcher>(N)) {
504 OS << "OPC_SwitchOpcode ";
505 NumCases = SOM->getNumCases();
506 } else {
507 OS << "OPC_SwitchType ";
508 NumCases = cast<SwitchTypeMatcher>(N)->getNumCases();
509 }
510
511 if (!OmitComments)
512 OS << "/*" << NumCases << " cases */";
513 OS << ", ";
514 ++CurrentIdx;
515
516 // For each case we emit the size, then the opcode, then the matcher.
517 for (unsigned i = 0, e = NumCases; i != e; ++i) {
518 const Matcher *Child;
519 unsigned IdxSize;
520 if (const SwitchOpcodeMatcher *SOM = dyn_cast<SwitchOpcodeMatcher>(N)) {
521 Child = SOM->getCaseMatcher(i);
522 IdxSize = 2; // size of opcode in table is 2 bytes.
523 } else {
524 Child = cast<SwitchTypeMatcher>(N)->getCaseMatcher(i);
525 IdxSize = 1; // size of type in table is 1 byte.
526 }
527
528 if (i != 0) {
529 if (!OmitComments)
530 OS << "/*" << format_decimal(CurrentIdx, IndexWidth) << "*/";
531 OS.indent(Indent);
532 if (!OmitComments)
533 OS << (isa<SwitchOpcodeMatcher>(N) ?
534 "/*SwitchOpcode*/ " : "/*SwitchType*/ ");
535 }
536
537 size_t ChildSize = Child->getSize();
538 CurrentIdx += EmitVBRValue(ChildSize, OS) + IdxSize;
539 if (const SwitchOpcodeMatcher *SOM = dyn_cast<SwitchOpcodeMatcher>(N))
540 OS << "TARGET_VAL(" << SOM->getCaseOpcode(i).getEnumName() << "),";
541 else
542 OS << getEnumName(cast<SwitchTypeMatcher>(N)->getCaseType(i)) << ',';
543 if (!OmitComments)
544 OS << "// ->" << CurrentIdx + ChildSize;
545 OS << '\n';
546
547 ChildSize = EmitMatcherList(Child, Indent+1, CurrentIdx, OS);
548 assert(ChildSize == Child->getSize() &&((ChildSize == Child->getSize() && "Emitted child size does not match calculated size"
) ? static_cast<void> (0) : __assert_fail ("ChildSize == Child->getSize() && \"Emitted child size does not match calculated size\""
, "/build/llvm-toolchain-snapshot-12~++20210125100614+2cdb34efdac5/llvm/utils/TableGen/DAGISelMatcherEmitter.cpp"
, 549, __PRETTY_FUNCTION__))
549 "Emitted child size does not match calculated size")((ChildSize == Child->getSize() && "Emitted child size does not match calculated size"
) ? static_cast<void> (0) : __assert_fail ("ChildSize == Child->getSize() && \"Emitted child size does not match calculated size\""
, "/build/llvm-toolchain-snapshot-12~++20210125100614+2cdb34efdac5/llvm/utils/TableGen/DAGISelMatcherEmitter.cpp"
, 549, __PRETTY_FUNCTION__))
;
550 CurrentIdx += ChildSize;
551 }
552
553 // Emit the final zero to terminate the switch.
554 if (!OmitComments)
555 OS << "/*" << format_decimal(CurrentIdx, IndexWidth) << "*/";
556 OS.indent(Indent) << "0,";
557 if (!OmitComments)
558 OS << (isa<SwitchOpcodeMatcher>(N) ?
559 " // EndSwitchOpcode" : " // EndSwitchType");
560
561 OS << '\n';
562 return CurrentIdx - StartIdx + 1;
563 }
564
565 case Matcher::CheckType:
566 if (cast<CheckTypeMatcher>(N)->getResNo() == 0) {
567 OS << "OPC_CheckType, "
568 << getEnumName(cast<CheckTypeMatcher>(N)->getType()) << ",\n";
569 return 2;
570 }
571 OS << "OPC_CheckTypeRes, " << cast<CheckTypeMatcher>(N)->getResNo()
572 << ", " << getEnumName(cast<CheckTypeMatcher>(N)->getType()) << ",\n";
573 return 3;
574
575 case Matcher::CheckChildType:
576 OS << "OPC_CheckChild"
577 << cast<CheckChildTypeMatcher>(N)->getChildNo() << "Type, "
578 << getEnumName(cast<CheckChildTypeMatcher>(N)->getType()) << ",\n";
579 return 2;
580
581 case Matcher::CheckInteger: {
582 OS << "OPC_CheckInteger, ";
583 unsigned Bytes=1+EmitVBRValue(cast<CheckIntegerMatcher>(N)->getValue(), OS);
584 OS << '\n';
585 return Bytes;
586 }
587 case Matcher::CheckChildInteger: {
588 OS << "OPC_CheckChild" << cast<CheckChildIntegerMatcher>(N)->getChildNo()
589 << "Integer, ";
590 unsigned Bytes=1+EmitVBRValue(cast<CheckChildIntegerMatcher>(N)->getValue(),
591 OS);
592 OS << '\n';
593 return Bytes;
594 }
595 case Matcher::CheckCondCode:
596 OS << "OPC_CheckCondCode, ISD::"
597 << cast<CheckCondCodeMatcher>(N)->getCondCodeName() << ",\n";
598 return 2;
599
600 case Matcher::CheckChild2CondCode:
601 OS << "OPC_CheckChild2CondCode, ISD::"
602 << cast<CheckChild2CondCodeMatcher>(N)->getCondCodeName() << ",\n";
603 return 2;
604
605 case Matcher::CheckValueType:
606 OS << "OPC_CheckValueType, MVT::"
607 << cast<CheckValueTypeMatcher>(N)->getTypeName() << ",\n";
608 return 2;
609
610 case Matcher::CheckComplexPat: {
611 const CheckComplexPatMatcher *CCPM = cast<CheckComplexPatMatcher>(N);
612 const ComplexPattern &Pattern = CCPM->getPattern();
613 OS << "OPC_CheckComplexPat, /*CP*/" << getComplexPat(Pattern) << ", /*#*/"
614 << CCPM->getMatchNumber() << ',';
615
616 if (!OmitComments) {
617 OS << " // " << Pattern.getSelectFunc();
618 OS << ":$" << CCPM->getName();
619 for (unsigned i = 0, e = Pattern.getNumOperands(); i != e; ++i)
620 OS << " #" << CCPM->getFirstResult()+i;
621
622 if (Pattern.hasProperty(SDNPHasChain))
623 OS << " + chain result";
624 }
625 OS << '\n';
626 return 3;
627 }
628
629 case Matcher::CheckAndImm: {
630 OS << "OPC_CheckAndImm, ";
631 unsigned Bytes=1+EmitVBRValue(cast<CheckAndImmMatcher>(N)->getValue(), OS);
632 OS << '\n';
633 return Bytes;
634 }
635
636 case Matcher::CheckOrImm: {
637 OS << "OPC_CheckOrImm, ";
638 unsigned Bytes = 1+EmitVBRValue(cast<CheckOrImmMatcher>(N)->getValue(), OS);
639 OS << '\n';
640 return Bytes;
641 }
642
643 case Matcher::CheckFoldableChainNode:
644 OS << "OPC_CheckFoldableChainNode,\n";
645 return 1;
646
647 case Matcher::CheckImmAllOnesV:
648 OS << "OPC_CheckImmAllOnesV,\n";
649 return 1;
650
651 case Matcher::CheckImmAllZerosV:
652 OS << "OPC_CheckImmAllZerosV,\n";
653 return 1;
654
655 case Matcher::EmitInteger: {
656 int64_t Val = cast<EmitIntegerMatcher>(N)->getValue();
657 OS << "OPC_EmitInteger, "
658 << getEnumName(cast<EmitIntegerMatcher>(N)->getVT()) << ", ";
659 unsigned Bytes = 2+EmitVBRValue(Val, OS);
660 OS << '\n';
661 return Bytes;
662 }
663 case Matcher::EmitStringInteger: {
664 const std::string &Val = cast<EmitStringIntegerMatcher>(N)->getValue();
665 // These should always fit into 7 bits.
666 OS << "OPC_EmitInteger, "
667 << getEnumName(cast<EmitStringIntegerMatcher>(N)->getVT()) << ", "
668 << Val << ",\n";
669 return 3;
670 }
671
672 case Matcher::EmitRegister: {
673 const EmitRegisterMatcher *Matcher = cast<EmitRegisterMatcher>(N);
674 const CodeGenRegister *Reg = Matcher->getReg();
675 // If the enum value of the register is larger than one byte can handle,
676 // use EmitRegister2.
677 if (Reg && Reg->EnumValue > 255) {
678 OS << "OPC_EmitRegister2, " << getEnumName(Matcher->getVT()) << ", ";
679 OS << "TARGET_VAL(" << getQualifiedName(Reg->TheDef) << "),\n";
680 return 4;
681 } else {
682 OS << "OPC_EmitRegister, " << getEnumName(Matcher->getVT()) << ", ";
683 if (Reg) {
684 OS << getQualifiedName(Reg->TheDef) << ",\n";
685 } else {
686 OS << "0 ";
687 if (!OmitComments)
688 OS << "/*zero_reg*/";
689 OS << ",\n";
690 }
691 return 3;
692 }
693 }
694
695 case Matcher::EmitConvertToTarget:
696 OS << "OPC_EmitConvertToTarget, "
697 << cast<EmitConvertToTargetMatcher>(N)->getSlot() << ",\n";
698 return 2;
699
700 case Matcher::EmitMergeInputChains: {
701 const EmitMergeInputChainsMatcher *MN =
702 cast<EmitMergeInputChainsMatcher>(N);
703
704 // Handle the specialized forms OPC_EmitMergeInputChains1_0, 1_1, and 1_2.
705 if (MN->getNumNodes() == 1 && MN->getNode(0) < 3) {
706 OS << "OPC_EmitMergeInputChains1_" << MN->getNode(0) << ",\n";
707 return 1;
708 }
709
710 OS << "OPC_EmitMergeInputChains, " << MN->getNumNodes() << ", ";
711 for (unsigned i = 0, e = MN->getNumNodes(); i != e; ++i)
712 OS << MN->getNode(i) << ", ";
713 OS << '\n';
714 return 2+MN->getNumNodes();
715 }
716 case Matcher::EmitCopyToReg: {
717 const auto *C2RMatcher = cast<EmitCopyToRegMatcher>(N);
718 int Bytes = 3;
719 const CodeGenRegister *Reg = C2RMatcher->getDestPhysReg();
720 if (Reg->EnumValue > 255) {
721 assert(isUInt<16>(Reg->EnumValue) && "not handled")((isUInt<16>(Reg->EnumValue) && "not handled"
) ? static_cast<void> (0) : __assert_fail ("isUInt<16>(Reg->EnumValue) && \"not handled\""
, "/build/llvm-toolchain-snapshot-12~++20210125100614+2cdb34efdac5/llvm/utils/TableGen/DAGISelMatcherEmitter.cpp"
, 721, __PRETTY_FUNCTION__))
;
722 OS << "OPC_EmitCopyToReg2, " << C2RMatcher->getSrcSlot() << ", "
723 << "TARGET_VAL(" << getQualifiedName(Reg->TheDef) << "),\n";
724 ++Bytes;
725 } else {
726 OS << "OPC_EmitCopyToReg, " << C2RMatcher->getSrcSlot() << ", "
727 << getQualifiedName(Reg->TheDef) << ",\n";
728 }
729
730 return Bytes;
731 }
732 case Matcher::EmitNodeXForm: {
733 const EmitNodeXFormMatcher *XF = cast<EmitNodeXFormMatcher>(N);
734 OS << "OPC_EmitNodeXForm, " << getNodeXFormID(XF->getNodeXForm()) << ", "
735 << XF->getSlot() << ',';
736 if (!OmitComments)
737 OS << " // "<<XF->getNodeXForm()->getName();
738 OS <<'\n';
739 return 3;
740 }
741
742 case Matcher::EmitNode:
743 case Matcher::MorphNodeTo: {
744 auto NumCoveredBytes = 0;
745 if (InstrumentCoverage) {
746 if (const MorphNodeToMatcher *SNT = dyn_cast<MorphNodeToMatcher>(N)) {
747 NumCoveredBytes = 3;
748 OS << "OPC_Coverage, ";
749 std::string src =
750 GetPatFromTreePatternNode(SNT->getPattern().getSrcPattern());
751 std::string dst =
752 GetPatFromTreePatternNode(SNT->getPattern().getDstPattern());
753 Record *PatRecord = SNT->getPattern().getSrcRecord();
754 std::string include_src = getIncludePath(PatRecord);
755 unsigned Offset =
756 getPatternIdxFromTable(src + " -> " + dst, std::move(include_src));
757 OS << "TARGET_VAL(" << Offset << "),\n";
758 OS.indent(FullIndexWidth + Indent);
759 }
760 }
761 const EmitNodeMatcherCommon *EN = cast<EmitNodeMatcherCommon>(N);
762 OS << (isa<EmitNodeMatcher>(EN) ? "OPC_EmitNode" : "OPC_MorphNodeTo");
763 bool CompressVTs = EN->getNumVTs() < 3;
764 if (CompressVTs)
765 OS << EN->getNumVTs();
766
767 OS << ", TARGET_VAL(" << EN->getOpcodeName() << "), 0";
768
769 if (EN->hasChain()) OS << "|OPFL_Chain";
770 if (EN->hasInFlag()) OS << "|OPFL_GlueInput";
771 if (EN->hasOutFlag()) OS << "|OPFL_GlueOutput";
772 if (EN->hasMemRefs()) OS << "|OPFL_MemRefs";
773 if (EN->getNumFixedArityOperands() != -1)
774 OS << "|OPFL_Variadic" << EN->getNumFixedArityOperands();
775 OS << ",\n";
776
777 OS.indent(FullIndexWidth + Indent+4);
778 if (!CompressVTs) {
779 OS << EN->getNumVTs();
780 if (!OmitComments)
781 OS << "/*#VTs*/";
782 OS << ", ";
783 }
784 for (unsigned i = 0, e = EN->getNumVTs(); i != e; ++i)
785 OS << getEnumName(EN->getVT(i)) << ", ";
786
787 OS << EN->getNumOperands();
788 if (!OmitComments)
789 OS << "/*#Ops*/";
790 OS << ", ";
791 unsigned NumOperandBytes = 0;
792 for (unsigned i = 0, e = EN->getNumOperands(); i != e; ++i)
793 NumOperandBytes += EmitVBRValue(EN->getOperand(i), OS);
794
795 if (!OmitComments) {
796 // Print the result #'s for EmitNode.
797 if (const EmitNodeMatcher *E = dyn_cast<EmitNodeMatcher>(EN)) {
798 if (unsigned NumResults = EN->getNumVTs()) {
799 OS << " // Results =";
800 unsigned First = E->getFirstResultSlot();
801 for (unsigned i = 0; i != NumResults; ++i)
802 OS << " #" << First+i;
803 }
804 }
805 OS << '\n';
806
807 if (const MorphNodeToMatcher *SNT = dyn_cast<MorphNodeToMatcher>(N)) {
808 OS.indent(FullIndexWidth + Indent) << "// Src: "
809 << *SNT->getPattern().getSrcPattern() << " - Complexity = "
810 << SNT->getPattern().getPatternComplexity(CGP) << '\n';
811 OS.indent(FullIndexWidth + Indent) << "// Dst: "
812 << *SNT->getPattern().getDstPattern() << '\n';
813 }
814 } else
815 OS << '\n';
816
817 return 5 + !CompressVTs + EN->getNumVTs() + NumOperandBytes +
818 NumCoveredBytes;
819 }
820 case Matcher::CompleteMatch: {
821 const CompleteMatchMatcher *CM = cast<CompleteMatchMatcher>(N);
822 auto NumCoveredBytes = 0;
823 if (InstrumentCoverage) {
824 NumCoveredBytes = 3;
825 OS << "OPC_Coverage, ";
826 std::string src =
827 GetPatFromTreePatternNode(CM->getPattern().getSrcPattern());
828 std::string dst =
829 GetPatFromTreePatternNode(CM->getPattern().getDstPattern());
830 Record *PatRecord = CM->getPattern().getSrcRecord();
831 std::string include_src = getIncludePath(PatRecord);
832 unsigned Offset =
833 getPatternIdxFromTable(src + " -> " + dst, std::move(include_src));
834 OS << "TARGET_VAL(" << Offset << "),\n";
835 OS.indent(FullIndexWidth + Indent);
836 }
837 OS << "OPC_CompleteMatch, " << CM->getNumResults() << ", ";
838 unsigned NumResultBytes = 0;
839 for (unsigned i = 0, e = CM->getNumResults(); i != e; ++i)
840 NumResultBytes += EmitVBRValue(CM->getResult(i), OS);
841 OS << '\n';
842 if (!OmitComments) {
843 OS.indent(FullIndexWidth + Indent) << " // Src: "
844 << *CM->getPattern().getSrcPattern() << " - Complexity = "
845 << CM->getPattern().getPatternComplexity(CGP) << '\n';
846 OS.indent(FullIndexWidth + Indent) << " // Dst: "
847 << *CM->getPattern().getDstPattern();
848 }
849 OS << '\n';
850 return 2 + NumResultBytes + NumCoveredBytes;
851 }
852 }
853 llvm_unreachable("Unreachable")::llvm::llvm_unreachable_internal("Unreachable", "/build/llvm-toolchain-snapshot-12~++20210125100614+2cdb34efdac5/llvm/utils/TableGen/DAGISelMatcherEmitter.cpp"
, 853)
;
854}
855
856/// This function traverses the matcher tree and emits all the nodes.
857/// The nodes have already been sized.
858unsigned MatcherTableEmitter::
859EmitMatcherList(const Matcher *N, const unsigned Indent, unsigned CurrentIdx,
860 raw_ostream &OS) {
861 unsigned Size = 0;
862 while (N) {
863 if (!OmitComments)
864 OS << "/*" << format_decimal(CurrentIdx, IndexWidth) << "*/";
865 unsigned MatcherSize = EmitMatcher(N, Indent, CurrentIdx, OS);
866 Size += MatcherSize;
867 CurrentIdx += MatcherSize;
868
869 // If there are other nodes in this list, iterate to them, otherwise we're
870 // done.
871 N = N->getNext();
872 }
873 return Size;
874}
875
876void MatcherTableEmitter::EmitNodePredicatesFunction(
877 const std::vector<TreePredicateFn> &Preds, StringRef Decl,
878 raw_ostream &OS) {
879 if (Preds.empty())
880 return;
881
882 BeginEmitFunction(OS, "bool", Decl, true/*AddOverride*/);
883 OS << "{\n";
884 OS << " switch (PredNo) {\n";
885 OS << " default: llvm_unreachable(\"Invalid predicate in table?\");\n";
886 for (unsigned i = 0, e = Preds.size(); i != e; ++i) {
887 // Emit the predicate code corresponding to this pattern.
888 const TreePredicateFn PredFn = Preds[i];
889
890 assert(!PredFn.isAlwaysTrue() && "No code in this predicate")((!PredFn.isAlwaysTrue() && "No code in this predicate"
) ? static_cast<void> (0) : __assert_fail ("!PredFn.isAlwaysTrue() && \"No code in this predicate\""
, "/build/llvm-toolchain-snapshot-12~++20210125100614+2cdb34efdac5/llvm/utils/TableGen/DAGISelMatcherEmitter.cpp"
, 890, __PRETTY_FUNCTION__))
;
891 OS << " case " << i << ": {\n";
892 for (auto *SimilarPred :
893 NodePredicatesByCodeToRun[PredFn.getCodeToRunOnSDNode()])
894 OS << " // " << TreePredicateFn(SimilarPred).getFnName() <<'\n';
895
896 OS << PredFn.getCodeToRunOnSDNode() << "\n }\n";
897 }
898 OS << " }\n";
899 OS << "}\n";
900 EndEmitFunction(OS);
901}
902
903void MatcherTableEmitter::EmitPredicateFunctions(raw_ostream &OS) {
904 // Emit pattern predicates.
905 if (!PatternPredicates.empty()) {
906 BeginEmitFunction(OS, "bool",
907 "CheckPatternPredicate(unsigned PredNo) const", true/*AddOverride*/);
908 OS << "{\n";
909 OS << " switch (PredNo) {\n";
910 OS << " default: llvm_unreachable(\"Invalid predicate in table?\");\n";
911 for (unsigned i = 0, e = PatternPredicates.size(); i != e; ++i)
912 OS << " case " << i << ": return " << PatternPredicates[i] << ";\n";
913 OS << " }\n";
914 OS << "}\n";
915 EndEmitFunction(OS);
916 }
917
918 // Emit Node predicates.
919 EmitNodePredicatesFunction(
920 NodePredicates, "CheckNodePredicate(SDNode *Node, unsigned PredNo) const",
921 OS);
922 EmitNodePredicatesFunction(
923 NodePredicatesWithOperands,
924 "CheckNodePredicateWithOperands(SDNode *Node, unsigned PredNo, "
925 "const SmallVectorImpl<SDValue> &Operands) const",
926 OS);
927
928 // Emit CompletePattern matchers.
929 // FIXME: This should be const.
930 if (!ComplexPatterns.empty()) {
931 BeginEmitFunction(OS, "bool",
932 "CheckComplexPattern(SDNode *Root, SDNode *Parent,\n"
933 " SDValue N, unsigned PatternNo,\n"
934 " SmallVectorImpl<std::pair<SDValue, SDNode *>> &Result)",
935 true/*AddOverride*/);
936 OS << "{\n";
937 OS << " unsigned NextRes = Result.size();\n";
938 OS << " switch (PatternNo) {\n";
939 OS << " default: llvm_unreachable(\"Invalid pattern # in table?\");\n";
940 for (unsigned i = 0, e = ComplexPatterns.size(); i != e; ++i) {
941 const ComplexPattern &P = *ComplexPatterns[i];
942 unsigned NumOps = P.getNumOperands();
943
944 if (P.hasProperty(SDNPHasChain))
945 ++NumOps; // Get the chained node too.
946
947 OS << " case " << i << ":\n";
948 if (InstrumentCoverage)
949 OS << " {\n";
950 OS << " Result.resize(NextRes+" << NumOps << ");\n";
951 if (InstrumentCoverage)
952 OS << " bool Succeeded = " << P.getSelectFunc();
953 else
954 OS << " return " << P.getSelectFunc();
955
956 OS << "(";
957 // If the complex pattern wants the root of the match, pass it in as the
958 // first argument.
959 if (P.hasProperty(SDNPWantRoot))
960 OS << "Root, ";
961
962 // If the complex pattern wants the parent of the operand being matched,
963 // pass it in as the next argument.
964 if (P.hasProperty(SDNPWantParent))
965 OS << "Parent, ";
966
967 OS << "N";
968 for (unsigned i = 0; i != NumOps; ++i)
969 OS << ", Result[NextRes+" << i << "].first";
970 OS << ");\n";
971 if (InstrumentCoverage) {
972 OS << " if (Succeeded)\n";
973 OS << " dbgs() << \"\\nCOMPLEX_PATTERN: " << P.getSelectFunc()
974 << "\\n\" ;\n";
975 OS << " return Succeeded;\n";
976 OS << " }\n";
977 }
978 }
979 OS << " }\n";
980 OS << "}\n";
981 EndEmitFunction(OS);
982 }
983
984
985 // Emit SDNodeXForm handlers.
986 // FIXME: This should be const.
987 if (!NodeXForms.empty()) {
988 BeginEmitFunction(OS, "SDValue",
989 "RunSDNodeXForm(SDValue V, unsigned XFormNo)", true/*AddOverride*/);
990 OS << "{\n";
991 OS << " switch (XFormNo) {\n";
992 OS << " default: llvm_unreachable(\"Invalid xform # in table?\");\n";
993
994 // FIXME: The node xform could take SDValue's instead of SDNode*'s.
995 for (unsigned i = 0, e = NodeXForms.size(); i != e; ++i) {
996 const CodeGenDAGPatterns::NodeXForm &Entry =
997 CGP.getSDNodeTransform(NodeXForms[i]);
998
999 Record *SDNode = Entry.first;
1000 const std::string &Code = Entry.second;
1001
1002 OS << " case " << i << ": { ";
1003 if (!OmitComments)
1004 OS << "// " << NodeXForms[i]->getName();
1005 OS << '\n';
1006
1007 std::string ClassName =
1008 std::string(CGP.getSDNodeInfo(SDNode).getSDClassName());
1009 if (ClassName == "SDNode")
1010 OS << " SDNode *N = V.getNode();\n";
1011 else
1012 OS << " " << ClassName << " *N = cast<" << ClassName
1013 << ">(V.getNode());\n";
1014 OS << Code << "\n }\n";
1015 }
1016 OS << " }\n";
1017 OS << "}\n";
1018 EndEmitFunction(OS);
1019 }
1020}
1021
1022static StringRef getOpcodeString(Matcher::KindTy Kind) {
1023 switch (Kind) {
1024 case Matcher::Scope: return "OPC_Scope"; break;
1025 case Matcher::RecordNode: return "OPC_RecordNode"; break;
1026 case Matcher::RecordChild: return "OPC_RecordChild"; break;
1027 case Matcher::RecordMemRef: return "OPC_RecordMemRef"; break;
1028 case Matcher::CaptureGlueInput: return "OPC_CaptureGlueInput"; break;
1029 case Matcher::MoveChild: return "OPC_MoveChild"; break;
1030 case Matcher::MoveParent: return "OPC_MoveParent"; break;
1031 case Matcher::CheckSame: return "OPC_CheckSame"; break;
1032 case Matcher::CheckChildSame: return "OPC_CheckChildSame"; break;
1033 case Matcher::CheckPatternPredicate:
1034 return "OPC_CheckPatternPredicate"; break;
1035 case Matcher::CheckPredicate: return "OPC_CheckPredicate"; break;
1036 case Matcher::CheckOpcode: return "OPC_CheckOpcode"; break;
1037 case Matcher::SwitchOpcode: return "OPC_SwitchOpcode"; break;
1038 case Matcher::CheckType: return "OPC_CheckType"; break;
1039 case Matcher::SwitchType: return "OPC_SwitchType"; break;
1040 case Matcher::CheckChildType: return "OPC_CheckChildType"; break;
1041 case Matcher::CheckInteger: return "OPC_CheckInteger"; break;
1042 case Matcher::CheckChildInteger: return "OPC_CheckChildInteger"; break;
1043 case Matcher::CheckCondCode: return "OPC_CheckCondCode"; break;
1044 case Matcher::CheckChild2CondCode: return "OPC_CheckChild2CondCode"; break;
1045 case Matcher::CheckValueType: return "OPC_CheckValueType"; break;
1046 case Matcher::CheckComplexPat: return "OPC_CheckComplexPat"; break;
1047 case Matcher::CheckAndImm: return "OPC_CheckAndImm"; break;
1048 case Matcher::CheckOrImm: return "OPC_CheckOrImm"; break;
1049 case Matcher::CheckFoldableChainNode:
1050 return "OPC_CheckFoldableChainNode"; break;
1051 case Matcher::CheckImmAllOnesV: return "OPC_CheckImmAllOnesV"; break;
1052 case Matcher::CheckImmAllZerosV: return "OPC_CheckImmAllZerosV"; break;
1053 case Matcher::EmitInteger: return "OPC_EmitInteger"; break;
1054 case Matcher::EmitStringInteger: return "OPC_EmitStringInteger"; break;
1055 case Matcher::EmitRegister: return "OPC_EmitRegister"; break;
1056 case Matcher::EmitConvertToTarget: return "OPC_EmitConvertToTarget"; break;
1057 case Matcher::EmitMergeInputChains: return "OPC_EmitMergeInputChains"; break;
1058 case Matcher::EmitCopyToReg: return "OPC_EmitCopyToReg"; break;
1059 case Matcher::EmitNode: return "OPC_EmitNode"; break;
1060 case Matcher::MorphNodeTo: return "OPC_MorphNodeTo"; break;
1061 case Matcher::EmitNodeXForm: return "OPC_EmitNodeXForm"; break;
1062 case Matcher::CompleteMatch: return "OPC_CompleteMatch"; break;
1063 }
1064
1065 llvm_unreachable("Unhandled opcode?")::llvm::llvm_unreachable_internal("Unhandled opcode?", "/build/llvm-toolchain-snapshot-12~++20210125100614+2cdb34efdac5/llvm/utils/TableGen/DAGISelMatcherEmitter.cpp"
, 1065)
;
1066}
1067
1068void MatcherTableEmitter::EmitHistogram(const Matcher *M,
1069 raw_ostream &OS) {
1070 if (OmitComments)
1071 return;
1072
1073 OS << " // Opcode Histogram:\n";
1074 for (unsigned i = 0, e = OpcodeCounts.size(); i != e; ++i) {
1075 OS << " // #"
1076 << left_justify(getOpcodeString((Matcher::KindTy)i), HistOpcWidth)
1077 << " = " << OpcodeCounts[i] << '\n';
1078 }
1079 OS << '\n';
1080}
1081
1082
1083void llvm::EmitMatcherTable(Matcher *TheMatcher,
1084 const CodeGenDAGPatterns &CGP,
1085 raw_ostream &OS) {
1086 OS << "#if defined(GET_DAGISEL_DECL) && defined(GET_DAGISEL_BODY)\n";
1087 OS << "#error GET_DAGISEL_DECL and GET_DAGISEL_BODY cannot be both defined, ";
1088 OS << "undef both for inline definitions\n";
1089 OS << "#endif\n\n";
1090
1091 // Emit a check for omitted class name.
1092 OS << "#ifdef GET_DAGISEL_BODY\n";
1093 OS << "#define LOCAL_DAGISEL_STRINGIZE(X) LOCAL_DAGISEL_STRINGIZE_(X)\n";
1094 OS << "#define LOCAL_DAGISEL_STRINGIZE_(X) #X\n";
1095 OS << "static_assert(sizeof(LOCAL_DAGISEL_STRINGIZE(GET_DAGISEL_BODY)) > 1,"
1096 "\n";
1097 OS << " \"GET_DAGISEL_BODY is empty: it should be defined with the class "
1098 "name\");\n";
1099 OS << "#undef LOCAL_DAGISEL_STRINGIZE_\n";
1100 OS << "#undef LOCAL_DAGISEL_STRINGIZE\n";
1101 OS << "#endif\n\n";
1102
1103 OS << "#if !defined(GET_DAGISEL_DECL) && !defined(GET_DAGISEL_BODY)\n";
1104 OS << "#define DAGISEL_INLINE 1\n";
1105 OS << "#else\n";
1106 OS << "#define DAGISEL_INLINE 0\n";
1107 OS << "#endif\n\n";
1108
1109 OS << "#if !DAGISEL_INLINE\n";
1110 OS << "#define DAGISEL_CLASS_COLONCOLON GET_DAGISEL_BODY ::\n";
1111 OS << "#else\n";
1112 OS << "#define DAGISEL_CLASS_COLONCOLON\n";
1113 OS << "#endif\n\n";
1114
1115 BeginEmitFunction(OS, "void", "SelectCode(SDNode *N)", false/*AddOverride*/);
1116 MatcherTableEmitter MatcherEmitter(CGP);
1117
1118 // First we size all the children of the three kinds of matchers that have
1119 // them. This is done by sharing the code in EmitMatcher(). but we don't
1120 // want to emit anything, so we turn off comments and use a null stream.
1121 bool SaveOmitComments = OmitComments;
1122 OmitComments = true;
1123 raw_null_ostream NullOS;
1124 unsigned TotalSize = MatcherEmitter.SizeMatcherList(TheMatcher, NullOS);
Value stored to 'TotalSize' during its initialization is never read
1125 OmitComments = SaveOmitComments;
1126
1127 // Now that the matchers are sized, we can emit the code for them to the
1128 // final stream.
1129 OS << "{\n";
1130 OS << " // Some target values are emitted as 2 bytes, TARGET_VAL handles\n";
1131 OS << " // this.\n";
1132 OS << " #define TARGET_VAL(X) X & 255, unsigned(X) >> 8\n";
1133 OS << " static const unsigned char MatcherTable[] = {\n";
1134 TotalSize = MatcherEmitter.EmitMatcherList(TheMatcher, 1, 0, OS);
1135 OS << " 0\n }; // Total Array size is " << (TotalSize+1) << " bytes\n\n";
1136
1137 MatcherEmitter.EmitHistogram(TheMatcher, OS);
1138
1139 OS << " #undef TARGET_VAL\n";
1140 OS << " SelectCodeCommon(N, MatcherTable,sizeof(MatcherTable));\n";
1141 OS << "}\n";
1142 EndEmitFunction(OS);
1143
1144 // Next up, emit the function for node and pattern predicates:
1145 MatcherEmitter.EmitPredicateFunctions(OS);
1146
1147 if (InstrumentCoverage)
1148 MatcherEmitter.EmitPatternMatchTable(OS);
1149
1150 // Clean up the preprocessor macros.
1151 OS << "\n";
1152 OS << "#ifdef DAGISEL_INLINE\n";
1153 OS << "#undef DAGISEL_INLINE\n";
1154 OS << "#endif\n";
1155 OS << "#ifdef DAGISEL_CLASS_COLONCOLON\n";
1156 OS << "#undef DAGISEL_CLASS_COLONCOLON\n";
1157 OS << "#endif\n";
1158 OS << "#ifdef GET_DAGISEL_DECL\n";
1159 OS << "#undef GET_DAGISEL_DECL\n";
1160 OS << "#endif\n";
1161 OS << "#ifdef GET_DAGISEL_BODY\n";
1162 OS << "#undef GET_DAGISEL_BODY\n";
1163 OS << "#endif\n";
1164}