Bug Summary

File:build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/llvm/utils/TableGen/DAGISelMatcherEmitter.cpp
Warning:line 1131, 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 -clear-ast-before-backend -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 -mframe-pointer=none -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -ffunction-sections -fdata-sections -fcoverage-compilation-dir=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/build-llvm -resource-dir /usr/lib/llvm-15/lib/clang/15.0.0 -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I utils/TableGen -I /build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/llvm/utils/TableGen -I include -I /build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/llvm/include -D _FORTIFY_SOURCE=2 -D NDEBUG -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/x86_64-linux-gnu/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/backward -internal-isystem /usr/lib/llvm-15/lib/clang/15.0.0/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -fmacro-prefix-map=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/build-llvm=build-llvm -fmacro-prefix-map=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/= -fcoverage-prefix-map=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/build-llvm=build-llvm -fcoverage-prefix-map=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/= -O3 -Wno-unused-command-line-argument -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-class-memaccess -Wno-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wno-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/build-llvm -fdebug-prefix-map=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/build-llvm=build-llvm -fdebug-prefix-map=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/= -ferror-limit 19 -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -fcolor-diagnostics -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/scan-build-2022-04-20-140412-16051-1 -x c++ /build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/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/MapVector.h"
17#include "llvm/ADT/StringMap.h"
18#include "llvm/ADT/TinyPtrVector.h"
19#include "llvm/Support/CommandLine.h"
20#include "llvm/Support/Format.h"
21#include "llvm/Support/SourceMgr.h"
22#include "llvm/TableGen/Error.h"
23#include "llvm/TableGen/Record.h"
24
25using namespace llvm;
26
27enum {
28 IndexWidth = 6,
29 FullIndexWidth = IndexWidth + 4,
30 HistOpcWidth = 40,
31};
32
33cl::OptionCategory DAGISelCat("Options for -gen-dag-isel");
34
35// To reduce generated source code size.
36static cl::opt<bool> OmitComments("omit-comments",
37 cl::desc("Do not generate comments"),
38 cl::init(false), cl::cat(DAGISelCat));
39
40static cl::opt<bool> InstrumentCoverage(
41 "instrument-coverage",
42 cl::desc("Generates tables to help identify patterns matched"),
43 cl::init(false), cl::cat(DAGISelCat));
44
45namespace {
46class MatcherTableEmitter {
47 const CodeGenDAGPatterns &CGP;
48
49 SmallVector<unsigned, Matcher::HighestKind+1> OpcodeCounts;
50
51 DenseMap<TreePattern *, unsigned> NodePredicateMap;
52 std::vector<TreePredicateFn> NodePredicates;
53 std::vector<TreePredicateFn> NodePredicatesWithOperands;
54
55 // We de-duplicate the predicates by code string, and use this map to track
56 // all the patterns with "identical" predicates.
57 StringMap<TinyPtrVector<TreePattern *>> NodePredicatesByCodeToRun;
58
59 StringMap<unsigned> PatternPredicateMap;
60 std::vector<std::string> PatternPredicates;
61
62 DenseMap<const ComplexPattern*, unsigned> ComplexPatternMap;
63 std::vector<const ComplexPattern*> ComplexPatterns;
64
65
66 DenseMap<Record*, unsigned> NodeXFormMap;
67 std::vector<Record*> NodeXForms;
68
69 std::vector<std::string> VecIncludeStrings;
70 MapVector<std::string, unsigned, StringMap<unsigned> > VecPatterns;
71
72 unsigned getPatternIdxFromTable(std::string &&P, std::string &&include_loc) {
73 const auto It = VecPatterns.find(P);
74 if (It == VecPatterns.end()) {
75 VecPatterns.insert(make_pair(std::move(P), VecPatterns.size()));
76 VecIncludeStrings.push_back(std::move(include_loc));
77 return VecIncludeStrings.size() - 1;
78 }
79 return It->second;
80 }
81
82public:
83 MatcherTableEmitter(const CodeGenDAGPatterns &cgp) : CGP(cgp) {
84 OpcodeCounts.assign(Matcher::HighestKind+1, 0);
85 }
86
87 unsigned EmitMatcherList(const Matcher *N, const unsigned Indent,
88 unsigned StartIdx, raw_ostream &OS);
89
90 unsigned SizeMatcherList(Matcher *N, raw_ostream &OS);
91
92 void EmitPredicateFunctions(raw_ostream &OS);
93
94 void EmitHistogram(const Matcher *N, raw_ostream &OS);
95
96 void EmitPatternMatchTable(raw_ostream &OS);
97
98private:
99 void EmitNodePredicatesFunction(const std::vector<TreePredicateFn> &Preds,
100 StringRef Decl, raw_ostream &OS);
101
102 unsigned SizeMatcher(Matcher *N, raw_ostream &OS);
103
104 unsigned EmitMatcher(const Matcher *N, const unsigned Indent, unsigned CurrentIdx,
105 raw_ostream &OS);
106
107 unsigned getNodePredicate(TreePredicateFn Pred) {
108 TreePattern *TP = Pred.getOrigPatFragRecord();
109 unsigned &Entry = NodePredicateMap[TP];
110 if (Entry == 0) {
111 TinyPtrVector<TreePattern *> &SameCodePreds =
112 NodePredicatesByCodeToRun[Pred.getCodeToRunOnSDNode()];
113 if (SameCodePreds.empty()) {
114 // We've never seen a predicate with the same code: allocate an entry.
115 if (Pred.usesOperands()) {
116 NodePredicatesWithOperands.push_back(Pred);
117 Entry = NodePredicatesWithOperands.size();
118 } else {
119 NodePredicates.push_back(Pred);
120 Entry = NodePredicates.size();
121 }
122 } else {
123 // We did see an identical predicate: re-use it.
124 Entry = NodePredicateMap[SameCodePreds.front()];
125 assert(Entry != 0)(static_cast <bool> (Entry != 0) ? void (0) : __assert_fail
("Entry != 0", "llvm/utils/TableGen/DAGISelMatcherEmitter.cpp"
, 125, __extension__ __PRETTY_FUNCTION__));
126 assert(TreePredicateFn(SameCodePreds.front()).usesOperands() ==(static_cast <bool> (TreePredicateFn(SameCodePreds.front
()).usesOperands() == Pred.usesOperands() && "PatFrags with some code must have same usesOperands setting"
) ? void (0) : __assert_fail ("TreePredicateFn(SameCodePreds.front()).usesOperands() == Pred.usesOperands() && \"PatFrags with some code must have same usesOperands setting\""
, "llvm/utils/TableGen/DAGISelMatcherEmitter.cpp", 128, __extension__
__PRETTY_FUNCTION__))
127 Pred.usesOperands() &&(static_cast <bool> (TreePredicateFn(SameCodePreds.front
()).usesOperands() == Pred.usesOperands() && "PatFrags with some code must have same usesOperands setting"
) ? void (0) : __assert_fail ("TreePredicateFn(SameCodePreds.front()).usesOperands() == Pred.usesOperands() && \"PatFrags with some code must have same usesOperands setting\""
, "llvm/utils/TableGen/DAGISelMatcherEmitter.cpp", 128, __extension__
__PRETTY_FUNCTION__))
128 "PatFrags with some code must have same usesOperands setting")(static_cast <bool> (TreePredicateFn(SameCodePreds.front
()).usesOperands() == Pred.usesOperands() && "PatFrags with some code must have same usesOperands setting"
) ? void (0) : __assert_fail ("TreePredicateFn(SameCodePreds.front()).usesOperands() == Pred.usesOperands() && \"PatFrags with some code must have same usesOperands setting\""
, "llvm/utils/TableGen/DAGISelMatcherEmitter.cpp", 128, __extension__
__PRETTY_FUNCTION__));
129 }
130 // In both cases, we've never seen this particular predicate before, so
131 // mark it in the list of predicates sharing the same code.
132 SameCodePreds.push_back(TP);
133 }
134 return Entry-1;
135 }
136
137 unsigned getPatternPredicate(StringRef PredName) {
138 unsigned &Entry = PatternPredicateMap[PredName];
139 if (Entry == 0) {
140 PatternPredicates.push_back(PredName.str());
141 Entry = PatternPredicates.size();
142 }
143 return Entry-1;
144 }
145 unsigned getComplexPat(const ComplexPattern &P) {
146 unsigned &Entry = ComplexPatternMap[&P];
147 if (Entry == 0) {
148 ComplexPatterns.push_back(&P);
149 Entry = ComplexPatterns.size();
150 }
151 return Entry-1;
152 }
153
154 unsigned getNodeXFormID(Record *Rec) {
155 unsigned &Entry = NodeXFormMap[Rec];
156 if (Entry == 0) {
157 NodeXForms.push_back(Rec);
158 Entry = NodeXForms.size();
159 }
160 return Entry-1;
161 }
162
163};
164} // end anonymous namespace.
165
166static std::string GetPatFromTreePatternNode(const TreePatternNode *N) {
167 std::string str;
168 raw_string_ostream Stream(str);
169 Stream << *N;
170 return str;
171}
172
173static unsigned GetVBRSize(unsigned Val) {
174 if (Val <= 127) return 1;
175
176 unsigned NumBytes = 0;
177 while (Val >= 128) {
178 Val >>= 7;
179 ++NumBytes;
180 }
181 return NumBytes+1;
182}
183
184/// EmitVBRValue - Emit the specified value as a VBR, returning the number of
185/// bytes emitted.
186static unsigned EmitVBRValue(uint64_t Val, raw_ostream &OS) {
187 if (Val <= 127) {
188 OS << Val << ", ";
189 return 1;
190 }
191
192 uint64_t InVal = Val;
193 unsigned NumBytes = 0;
194 while (Val >= 128) {
195 OS << (Val&127) << "|128,";
196 Val >>= 7;
197 ++NumBytes;
198 }
199 OS << Val;
200 if (!OmitComments)
201 OS << "/*" << InVal << "*/";
202 OS << ", ";
203 return NumBytes+1;
204}
205
206/// Emit the specified signed value as a VBR. To improve compression we encode
207/// positive numbers shifted left by 1 and negative numbers negated and shifted
208/// left by 1 with bit 0 set.
209static unsigned EmitSignedVBRValue(uint64_t Val, raw_ostream &OS) {
210 if ((int64_t)Val >= 0)
211 Val = Val << 1;
212 else
213 Val = (-Val << 1) | 1;
214
215 return EmitVBRValue(Val, OS);
216}
217
218// This is expensive and slow.
219static std::string getIncludePath(const Record *R) {
220 std::string str;
221 raw_string_ostream Stream(str);
222 auto Locs = R->getLoc();
223 SMLoc L;
224 if (Locs.size() > 1) {
225 // Get where the pattern prototype was instantiated
226 L = Locs[1];
227 } else if (Locs.size() == 1) {
228 L = Locs[0];
229 }
230 unsigned CurBuf = SrcMgr.FindBufferContainingLoc(L);
231 assert(CurBuf && "Invalid or unspecified location!")(static_cast <bool> (CurBuf && "Invalid or unspecified location!"
) ? void (0) : __assert_fail ("CurBuf && \"Invalid or unspecified location!\""
, "llvm/utils/TableGen/DAGISelMatcherEmitter.cpp", 231, __extension__
__PRETTY_FUNCTION__));
232
233 Stream << SrcMgr.getBufferInfo(CurBuf).Buffer->getBufferIdentifier() << ":"
234 << SrcMgr.FindLineNumber(L, CurBuf);
235 return str;
236}
237
238/// This function traverses the matcher tree and sizes all the nodes
239/// that are children of the three kinds of nodes that have them.
240unsigned MatcherTableEmitter::
241SizeMatcherList(Matcher *N, raw_ostream &OS) {
242 unsigned Size = 0;
243 while (N) {
244 Size += SizeMatcher(N, OS);
245 N = N->getNext();
246 }
247 return Size;
248}
249
250/// This function sizes the children of the three kinds of nodes that
251/// have them. It does so by using special cases for those three
252/// nodes, but sharing the code in EmitMatcher() for the other kinds.
253unsigned MatcherTableEmitter::
254SizeMatcher(Matcher *N, raw_ostream &OS) {
255 unsigned Idx = 0;
256
257 ++OpcodeCounts[N->getKind()];
258 switch (N->getKind()) {
259 // The Scope matcher has its kind, a series of child size + child,
260 // and a trailing zero.
261 case Matcher::Scope: {
262 ScopeMatcher *SM = cast<ScopeMatcher>(N);
263 assert(SM->getNext() == nullptr && "Scope matcher should not have next")(static_cast <bool> (SM->getNext() == nullptr &&
"Scope matcher should not have next") ? void (0) : __assert_fail
("SM->getNext() == nullptr && \"Scope matcher should not have next\""
, "llvm/utils/TableGen/DAGISelMatcherEmitter.cpp", 263, __extension__
__PRETTY_FUNCTION__));
264 unsigned Size = 1; // Count the kind.
265 for (unsigned i = 0, e = SM->getNumChildren(); i != e; ++i) {
266 const unsigned ChildSize = SizeMatcherList(SM->getChild(i), OS);
267 assert(ChildSize != 0 && "Matcher cannot have child of size 0")(static_cast <bool> (ChildSize != 0 && "Matcher cannot have child of size 0"
) ? void (0) : __assert_fail ("ChildSize != 0 && \"Matcher cannot have child of size 0\""
, "llvm/utils/TableGen/DAGISelMatcherEmitter.cpp", 267, __extension__
__PRETTY_FUNCTION__));
268 SM->getChild(i)->setSize(ChildSize);
269 Size += GetVBRSize(ChildSize) + ChildSize; // Count VBR and child size.
270 }
271 ++Size; // Count the zero sentinel.
272 return Size;
273 }
274
275 // SwitchOpcode and SwitchType have their kind, a series of child size +
276 // opcode/type + child, and a trailing zero.
277 case Matcher::SwitchOpcode:
278 case Matcher::SwitchType: {
279 unsigned Size = 1; // Count the kind.
280 unsigned NumCases;
281 if (const SwitchOpcodeMatcher *SOM = dyn_cast<SwitchOpcodeMatcher>(N))
282 NumCases = SOM->getNumCases();
283 else
284 NumCases = cast<SwitchTypeMatcher>(N)->getNumCases();
285 for (unsigned i = 0, e = NumCases; i != e; ++i) {
286 Matcher *Child;
287 if (SwitchOpcodeMatcher *SOM = dyn_cast<SwitchOpcodeMatcher>(N)) {
288 Child = SOM->getCaseMatcher(i);
289 Size += 2; // Count the child's opcode.
290 } else {
291 Child = cast<SwitchTypeMatcher>(N)->getCaseMatcher(i);
292 ++Size; // Count the child's type.
293 }
294 const unsigned ChildSize = SizeMatcherList(Child, OS);
295 assert(ChildSize != 0 && "Matcher cannot have child of size 0")(static_cast <bool> (ChildSize != 0 && "Matcher cannot have child of size 0"
) ? void (0) : __assert_fail ("ChildSize != 0 && \"Matcher cannot have child of size 0\""
, "llvm/utils/TableGen/DAGISelMatcherEmitter.cpp", 295, __extension__
__PRETTY_FUNCTION__));
296 Child->setSize(ChildSize);
297 Size += GetVBRSize(ChildSize) + ChildSize; // Count VBR and child size.
298 }
299 ++Size; // Count the zero sentinel.
300 return Size;
301 }
302
303 default:
304 // Employ the matcher emitter to size other matchers.
305 return EmitMatcher(N, 0, Idx, OS);
306 }
307 llvm_unreachable("Unreachable")::llvm::llvm_unreachable_internal("Unreachable", "llvm/utils/TableGen/DAGISelMatcherEmitter.cpp"
, 307);
308}
309
310static void BeginEmitFunction(raw_ostream &OS, StringRef RetType,
311 StringRef Decl, bool AddOverride) {
312 OS << "#ifdef GET_DAGISEL_DECL\n";
313 OS << RetType << ' ' << Decl;
314 if (AddOverride)
315 OS << " override";
316 OS << ";\n"
317 "#endif\n"
318 "#if defined(GET_DAGISEL_BODY) || DAGISEL_INLINE\n";
319 OS << RetType << " DAGISEL_CLASS_COLONCOLON " << Decl << "\n";
320 if (AddOverride) {
321 OS << "#if DAGISEL_INLINE\n"
322 " override\n"
323 "#endif\n";
324 }
325}
326
327static void EndEmitFunction(raw_ostream &OS) {
328 OS << "#endif // GET_DAGISEL_BODY\n\n";
329}
330
331void MatcherTableEmitter::EmitPatternMatchTable(raw_ostream &OS) {
332
333 assert(isUInt<16>(VecPatterns.size()) &&(static_cast <bool> (isUInt<16>(VecPatterns.size(
)) && "Using only 16 bits to encode offset into Pattern Table"
) ? void (0) : __assert_fail ("isUInt<16>(VecPatterns.size()) && \"Using only 16 bits to encode offset into Pattern Table\""
, "llvm/utils/TableGen/DAGISelMatcherEmitter.cpp", 334, __extension__
__PRETTY_FUNCTION__))
334 "Using only 16 bits to encode offset into Pattern Table")(static_cast <bool> (isUInt<16>(VecPatterns.size(
)) && "Using only 16 bits to encode offset into Pattern Table"
) ? void (0) : __assert_fail ("isUInt<16>(VecPatterns.size()) && \"Using only 16 bits to encode offset into Pattern Table\""
, "llvm/utils/TableGen/DAGISelMatcherEmitter.cpp", 334, __extension__
__PRETTY_FUNCTION__));
335 assert(VecPatterns.size() == VecIncludeStrings.size() &&(static_cast <bool> (VecPatterns.size() == VecIncludeStrings
.size() && "The sizes of Pattern and include vectors should be the same"
) ? void (0) : __assert_fail ("VecPatterns.size() == VecIncludeStrings.size() && \"The sizes of Pattern and include vectors should be the same\""
, "llvm/utils/TableGen/DAGISelMatcherEmitter.cpp", 336, __extension__
__PRETTY_FUNCTION__))
336 "The sizes of Pattern and include vectors should be the same")(static_cast <bool> (VecPatterns.size() == VecIncludeStrings
.size() && "The sizes of Pattern and include vectors should be the same"
) ? void (0) : __assert_fail ("VecPatterns.size() == VecIncludeStrings.size() && \"The sizes of Pattern and include vectors should be the same\""
, "llvm/utils/TableGen/DAGISelMatcherEmitter.cpp", 336, __extension__
__PRETTY_FUNCTION__));
337
338 BeginEmitFunction(OS, "StringRef", "getPatternForIndex(unsigned Index)",
339 true/*AddOverride*/);
340 OS << "{\n";
341 OS << "static const char *PATTERN_MATCH_TABLE[] = {\n";
342
343 for (const auto &It : VecPatterns) {
344 OS << "\"" << It.first << "\",\n";
345 }
346
347 OS << "\n};";
348 OS << "\nreturn StringRef(PATTERN_MATCH_TABLE[Index]);";
349 OS << "\n}\n";
350 EndEmitFunction(OS);
351
352 BeginEmitFunction(OS, "StringRef", "getIncludePathForIndex(unsigned Index)",
353 true/*AddOverride*/);
354 OS << "{\n";
355 OS << "static const char *INCLUDE_PATH_TABLE[] = {\n";
356
357 for (const auto &It : VecIncludeStrings) {
358 OS << "\"" << It << "\",\n";
359 }
360
361 OS << "\n};";
362 OS << "\nreturn StringRef(INCLUDE_PATH_TABLE[Index]);";
363 OS << "\n}\n";
364 EndEmitFunction(OS);
365}
366
367/// EmitMatcher - Emit bytes for the specified matcher and return
368/// the number of bytes emitted.
369unsigned MatcherTableEmitter::
370EmitMatcher(const Matcher *N, const unsigned Indent, unsigned CurrentIdx,
371 raw_ostream &OS) {
372 OS.indent(Indent);
373
374 switch (N->getKind()) {
375 case Matcher::Scope: {
376 const ScopeMatcher *SM = cast<ScopeMatcher>(N);
377 unsigned StartIdx = CurrentIdx;
378
379 // Emit all of the children.
380 for (unsigned i = 0, e = SM->getNumChildren(); i != e; ++i) {
381 if (i == 0) {
382 OS << "OPC_Scope, ";
383 ++CurrentIdx;
384 } else {
385 if (!OmitComments) {
386 OS << "/*" << format_decimal(CurrentIdx, IndexWidth) << "*/";
387 OS.indent(Indent) << "/*Scope*/ ";
388 } else
389 OS.indent(Indent);
390 }
391
392 unsigned ChildSize = SM->getChild(i)->getSize();
393 unsigned VBRSize = EmitVBRValue(ChildSize, OS);
394 if (!OmitComments) {
395 OS << "/*->" << CurrentIdx + VBRSize + ChildSize << "*/";
396 if (i == 0)
397 OS << " // " << SM->getNumChildren() << " children in Scope";
398 }
399 OS << '\n';
400
401 ChildSize = EmitMatcherList(SM->getChild(i), Indent+1,
402 CurrentIdx + VBRSize, OS);
403 assert(ChildSize == SM->getChild(i)->getSize() &&(static_cast <bool> (ChildSize == SM->getChild(i)->
getSize() && "Emitted child size does not match calculated size"
) ? void (0) : __assert_fail ("ChildSize == SM->getChild(i)->getSize() && \"Emitted child size does not match calculated size\""
, "llvm/utils/TableGen/DAGISelMatcherEmitter.cpp", 404, __extension__
__PRETTY_FUNCTION__))
404 "Emitted child size does not match calculated size")(static_cast <bool> (ChildSize == SM->getChild(i)->
getSize() && "Emitted child size does not match calculated size"
) ? void (0) : __assert_fail ("ChildSize == SM->getChild(i)->getSize() && \"Emitted child size does not match calculated size\""
, "llvm/utils/TableGen/DAGISelMatcherEmitter.cpp", 404, __extension__
__PRETTY_FUNCTION__));
405 CurrentIdx += VBRSize + ChildSize;
406 }
407
408 // Emit a zero as a sentinel indicating end of 'Scope'.
409 if (!OmitComments)
410 OS << "/*" << format_decimal(CurrentIdx, IndexWidth) << "*/";
411 OS.indent(Indent) << "0, ";
412 if (!OmitComments)
413 OS << "/*End of Scope*/";
414 OS << '\n';
415 return CurrentIdx - StartIdx + 1;
416 }
417
418 case Matcher::RecordNode:
419 OS << "OPC_RecordNode,";
420 if (!OmitComments)
421 OS << " // #"
422 << cast<RecordMatcher>(N)->getResultNo() << " = "
423 << cast<RecordMatcher>(N)->getWhatFor();
424 OS << '\n';
425 return 1;
426
427 case Matcher::RecordChild:
428 OS << "OPC_RecordChild" << cast<RecordChildMatcher>(N)->getChildNo()
429 << ',';
430 if (!OmitComments)
431 OS << " // #"
432 << cast<RecordChildMatcher>(N)->getResultNo() << " = "
433 << cast<RecordChildMatcher>(N)->getWhatFor();
434 OS << '\n';
435 return 1;
436
437 case Matcher::RecordMemRef:
438 OS << "OPC_RecordMemRef,\n";
439 return 1;
440
441 case Matcher::CaptureGlueInput:
442 OS << "OPC_CaptureGlueInput,\n";
443 return 1;
444
445 case Matcher::MoveChild: {
446 const auto *MCM = cast<MoveChildMatcher>(N);
447
448 OS << "OPC_MoveChild";
449 // Handle the specialized forms.
450 if (MCM->getChildNo() >= 8)
451 OS << ", ";
452 OS << MCM->getChildNo() << ",\n";
453 return (MCM->getChildNo() >= 8) ? 2 : 1;
454 }
455
456 case Matcher::MoveParent:
457 OS << "OPC_MoveParent,\n";
458 return 1;
459
460 case Matcher::CheckSame:
461 OS << "OPC_CheckSame, "
462 << cast<CheckSameMatcher>(N)->getMatchNumber() << ",\n";
463 return 2;
464
465 case Matcher::CheckChildSame:
466 OS << "OPC_CheckChild"
467 << cast<CheckChildSameMatcher>(N)->getChildNo() << "Same, "
468 << cast<CheckChildSameMatcher>(N)->getMatchNumber() << ",\n";
469 return 2;
470
471 case Matcher::CheckPatternPredicate: {
472 StringRef Pred =cast<CheckPatternPredicateMatcher>(N)->getPredicate();
473 OS << "OPC_CheckPatternPredicate, " << getPatternPredicate(Pred) << ',';
474 if (!OmitComments)
475 OS << " // " << Pred;
476 OS << '\n';
477 return 2;
478 }
479 case Matcher::CheckPredicate: {
480 TreePredicateFn Pred = cast<CheckPredicateMatcher>(N)->getPredicate();
481 unsigned OperandBytes = 0;
482
483 if (Pred.usesOperands()) {
484 unsigned NumOps = cast<CheckPredicateMatcher>(N)->getNumOperands();
485 OS << "OPC_CheckPredicateWithOperands, " << NumOps << "/*#Ops*/, ";
486 for (unsigned i = 0; i < NumOps; ++i)
487 OS << cast<CheckPredicateMatcher>(N)->getOperandNo(i) << ", ";
488 OperandBytes = 1 + NumOps;
489 } else {
490 OS << "OPC_CheckPredicate, ";
491 }
492
493 OS << getNodePredicate(Pred) << ',';
494 if (!OmitComments)
495 OS << " // " << Pred.getFnName();
496 OS << '\n';
497 return 2 + OperandBytes;
498 }
499
500 case Matcher::CheckOpcode:
501 OS << "OPC_CheckOpcode, TARGET_VAL("
502 << cast<CheckOpcodeMatcher>(N)->getOpcode().getEnumName() << "),\n";
503 return 3;
504
505 case Matcher::SwitchOpcode:
506 case Matcher::SwitchType: {
507 unsigned StartIdx = CurrentIdx;
508
509 unsigned NumCases;
510 if (const SwitchOpcodeMatcher *SOM = dyn_cast<SwitchOpcodeMatcher>(N)) {
511 OS << "OPC_SwitchOpcode ";
512 NumCases = SOM->getNumCases();
513 } else {
514 OS << "OPC_SwitchType ";
515 NumCases = cast<SwitchTypeMatcher>(N)->getNumCases();
516 }
517
518 if (!OmitComments)
519 OS << "/*" << NumCases << " cases */";
520 OS << ", ";
521 ++CurrentIdx;
522
523 // For each case we emit the size, then the opcode, then the matcher.
524 for (unsigned i = 0, e = NumCases; i != e; ++i) {
525 const Matcher *Child;
526 unsigned IdxSize;
527 if (const SwitchOpcodeMatcher *SOM = dyn_cast<SwitchOpcodeMatcher>(N)) {
528 Child = SOM->getCaseMatcher(i);
529 IdxSize = 2; // size of opcode in table is 2 bytes.
530 } else {
531 Child = cast<SwitchTypeMatcher>(N)->getCaseMatcher(i);
532 IdxSize = 1; // size of type in table is 1 byte.
533 }
534
535 if (i != 0) {
536 if (!OmitComments)
537 OS << "/*" << format_decimal(CurrentIdx, IndexWidth) << "*/";
538 OS.indent(Indent);
539 if (!OmitComments)
540 OS << (isa<SwitchOpcodeMatcher>(N) ?
541 "/*SwitchOpcode*/ " : "/*SwitchType*/ ");
542 }
543
544 unsigned ChildSize = Child->getSize();
545 CurrentIdx += EmitVBRValue(ChildSize, OS) + IdxSize;
546 if (const SwitchOpcodeMatcher *SOM = dyn_cast<SwitchOpcodeMatcher>(N))
547 OS << "TARGET_VAL(" << SOM->getCaseOpcode(i).getEnumName() << "),";
548 else
549 OS << getEnumName(cast<SwitchTypeMatcher>(N)->getCaseType(i)) << ',';
550 if (!OmitComments)
551 OS << "// ->" << CurrentIdx + ChildSize;
552 OS << '\n';
553
554 ChildSize = EmitMatcherList(Child, Indent+1, CurrentIdx, OS);
555 assert(ChildSize == Child->getSize() &&(static_cast <bool> (ChildSize == Child->getSize() &&
"Emitted child size does not match calculated size") ? void (
0) : __assert_fail ("ChildSize == Child->getSize() && \"Emitted child size does not match calculated size\""
, "llvm/utils/TableGen/DAGISelMatcherEmitter.cpp", 556, __extension__
__PRETTY_FUNCTION__))
556 "Emitted child size does not match calculated size")(static_cast <bool> (ChildSize == Child->getSize() &&
"Emitted child size does not match calculated size") ? void (
0) : __assert_fail ("ChildSize == Child->getSize() && \"Emitted child size does not match calculated size\""
, "llvm/utils/TableGen/DAGISelMatcherEmitter.cpp", 556, __extension__
__PRETTY_FUNCTION__));
557 CurrentIdx += ChildSize;
558 }
559
560 // Emit the final zero to terminate the switch.
561 if (!OmitComments)
562 OS << "/*" << format_decimal(CurrentIdx, IndexWidth) << "*/";
563 OS.indent(Indent) << "0,";
564 if (!OmitComments)
565 OS << (isa<SwitchOpcodeMatcher>(N) ?
566 " // EndSwitchOpcode" : " // EndSwitchType");
567
568 OS << '\n';
569 return CurrentIdx - StartIdx + 1;
570 }
571
572 case Matcher::CheckType:
573 if (cast<CheckTypeMatcher>(N)->getResNo() == 0) {
574 OS << "OPC_CheckType, "
575 << getEnumName(cast<CheckTypeMatcher>(N)->getType()) << ",\n";
576 return 2;
577 }
578 OS << "OPC_CheckTypeRes, " << cast<CheckTypeMatcher>(N)->getResNo()
579 << ", " << getEnumName(cast<CheckTypeMatcher>(N)->getType()) << ",\n";
580 return 3;
581
582 case Matcher::CheckChildType:
583 OS << "OPC_CheckChild"
584 << cast<CheckChildTypeMatcher>(N)->getChildNo() << "Type, "
585 << getEnumName(cast<CheckChildTypeMatcher>(N)->getType()) << ",\n";
586 return 2;
587
588 case Matcher::CheckInteger: {
589 OS << "OPC_CheckInteger, ";
590 unsigned Bytes =
591 1 + EmitSignedVBRValue(cast<CheckIntegerMatcher>(N)->getValue(), OS);
592 OS << '\n';
593 return Bytes;
594 }
595 case Matcher::CheckChildInteger: {
596 OS << "OPC_CheckChild" << cast<CheckChildIntegerMatcher>(N)->getChildNo()
597 << "Integer, ";
598 unsigned Bytes = 1 + EmitSignedVBRValue(
599 cast<CheckChildIntegerMatcher>(N)->getValue(), OS);
600 OS << '\n';
601 return Bytes;
602 }
603 case Matcher::CheckCondCode:
604 OS << "OPC_CheckCondCode, ISD::"
605 << cast<CheckCondCodeMatcher>(N)->getCondCodeName() << ",\n";
606 return 2;
607
608 case Matcher::CheckChild2CondCode:
609 OS << "OPC_CheckChild2CondCode, ISD::"
610 << cast<CheckChild2CondCodeMatcher>(N)->getCondCodeName() << ",\n";
611 return 2;
612
613 case Matcher::CheckValueType:
614 OS << "OPC_CheckValueType, MVT::"
615 << cast<CheckValueTypeMatcher>(N)->getTypeName() << ",\n";
616 return 2;
617
618 case Matcher::CheckComplexPat: {
619 const CheckComplexPatMatcher *CCPM = cast<CheckComplexPatMatcher>(N);
620 const ComplexPattern &Pattern = CCPM->getPattern();
621 OS << "OPC_CheckComplexPat, /*CP*/" << getComplexPat(Pattern) << ", /*#*/"
622 << CCPM->getMatchNumber() << ',';
623
624 if (!OmitComments) {
625 OS << " // " << Pattern.getSelectFunc();
626 OS << ":$" << CCPM->getName();
627 for (unsigned i = 0, e = Pattern.getNumOperands(); i != e; ++i)
628 OS << " #" << CCPM->getFirstResult()+i;
629
630 if (Pattern.hasProperty(SDNPHasChain))
631 OS << " + chain result";
632 }
633 OS << '\n';
634 return 3;
635 }
636
637 case Matcher::CheckAndImm: {
638 OS << "OPC_CheckAndImm, ";
639 unsigned Bytes=1+EmitVBRValue(cast<CheckAndImmMatcher>(N)->getValue(), OS);
640 OS << '\n';
641 return Bytes;
642 }
643
644 case Matcher::CheckOrImm: {
645 OS << "OPC_CheckOrImm, ";
646 unsigned Bytes = 1+EmitVBRValue(cast<CheckOrImmMatcher>(N)->getValue(), OS);
647 OS << '\n';
648 return Bytes;
649 }
650
651 case Matcher::CheckFoldableChainNode:
652 OS << "OPC_CheckFoldableChainNode,\n";
653 return 1;
654
655 case Matcher::CheckImmAllOnesV:
656 OS << "OPC_CheckImmAllOnesV,\n";
657 return 1;
658
659 case Matcher::CheckImmAllZerosV:
660 OS << "OPC_CheckImmAllZerosV,\n";
661 return 1;
662
663 case Matcher::EmitInteger: {
664 int64_t Val = cast<EmitIntegerMatcher>(N)->getValue();
665 OS << "OPC_EmitInteger, "
666 << getEnumName(cast<EmitIntegerMatcher>(N)->getVT()) << ", ";
667 unsigned Bytes = 2 + EmitSignedVBRValue(Val, OS);
668 OS << '\n';
669 return Bytes;
670 }
671 case Matcher::EmitStringInteger: {
672 const std::string &Val = cast<EmitStringIntegerMatcher>(N)->getValue();
673 // These should always fit into 7 bits.
674 OS << "OPC_EmitStringInteger, "
675 << getEnumName(cast<EmitStringIntegerMatcher>(N)->getVT()) << ", " << Val
676 << ",\n";
677 return 3;
678 }
679
680 case Matcher::EmitRegister: {
681 const EmitRegisterMatcher *Matcher = cast<EmitRegisterMatcher>(N);
682 const CodeGenRegister *Reg = Matcher->getReg();
683 // If the enum value of the register is larger than one byte can handle,
684 // use EmitRegister2.
685 if (Reg && Reg->EnumValue > 255) {
686 OS << "OPC_EmitRegister2, " << getEnumName(Matcher->getVT()) << ", ";
687 OS << "TARGET_VAL(" << getQualifiedName(Reg->TheDef) << "),\n";
688 return 4;
689 } else {
690 OS << "OPC_EmitRegister, " << getEnumName(Matcher->getVT()) << ", ";
691 if (Reg) {
692 OS << getQualifiedName(Reg->TheDef) << ",\n";
693 } else {
694 OS << "0 ";
695 if (!OmitComments)
696 OS << "/*zero_reg*/";
697 OS << ",\n";
698 }
699 return 3;
700 }
701 }
702
703 case Matcher::EmitConvertToTarget:
704 OS << "OPC_EmitConvertToTarget, "
705 << cast<EmitConvertToTargetMatcher>(N)->getSlot() << ",\n";
706 return 2;
707
708 case Matcher::EmitMergeInputChains: {
709 const EmitMergeInputChainsMatcher *MN =
710 cast<EmitMergeInputChainsMatcher>(N);
711
712 // Handle the specialized forms OPC_EmitMergeInputChains1_0, 1_1, and 1_2.
713 if (MN->getNumNodes() == 1 && MN->getNode(0) < 3) {
714 OS << "OPC_EmitMergeInputChains1_" << MN->getNode(0) << ",\n";
715 return 1;
716 }
717
718 OS << "OPC_EmitMergeInputChains, " << MN->getNumNodes() << ", ";
719 for (unsigned i = 0, e = MN->getNumNodes(); i != e; ++i)
720 OS << MN->getNode(i) << ", ";
721 OS << '\n';
722 return 2+MN->getNumNodes();
723 }
724 case Matcher::EmitCopyToReg: {
725 const auto *C2RMatcher = cast<EmitCopyToRegMatcher>(N);
726 int Bytes = 3;
727 const CodeGenRegister *Reg = C2RMatcher->getDestPhysReg();
728 if (Reg->EnumValue > 255) {
729 assert(isUInt<16>(Reg->EnumValue) && "not handled")(static_cast <bool> (isUInt<16>(Reg->EnumValue
) && "not handled") ? void (0) : __assert_fail ("isUInt<16>(Reg->EnumValue) && \"not handled\""
, "llvm/utils/TableGen/DAGISelMatcherEmitter.cpp", 729, __extension__
__PRETTY_FUNCTION__));
730 OS << "OPC_EmitCopyToReg2, " << C2RMatcher->getSrcSlot() << ", "
731 << "TARGET_VAL(" << getQualifiedName(Reg->TheDef) << "),\n";
732 ++Bytes;
733 } else {
734 OS << "OPC_EmitCopyToReg, " << C2RMatcher->getSrcSlot() << ", "
735 << getQualifiedName(Reg->TheDef) << ",\n";
736 }
737
738 return Bytes;
739 }
740 case Matcher::EmitNodeXForm: {
741 const EmitNodeXFormMatcher *XF = cast<EmitNodeXFormMatcher>(N);
742 OS << "OPC_EmitNodeXForm, " << getNodeXFormID(XF->getNodeXForm()) << ", "
743 << XF->getSlot() << ',';
744 if (!OmitComments)
745 OS << " // "<<XF->getNodeXForm()->getName();
746 OS <<'\n';
747 return 3;
748 }
749
750 case Matcher::EmitNode:
751 case Matcher::MorphNodeTo: {
752 auto NumCoveredBytes = 0;
753 if (InstrumentCoverage) {
754 if (const MorphNodeToMatcher *SNT = dyn_cast<MorphNodeToMatcher>(N)) {
755 NumCoveredBytes = 3;
756 OS << "OPC_Coverage, ";
757 std::string src =
758 GetPatFromTreePatternNode(SNT->getPattern().getSrcPattern());
759 std::string dst =
760 GetPatFromTreePatternNode(SNT->getPattern().getDstPattern());
761 Record *PatRecord = SNT->getPattern().getSrcRecord();
762 std::string include_src = getIncludePath(PatRecord);
763 unsigned Offset =
764 getPatternIdxFromTable(src + " -> " + dst, std::move(include_src));
765 OS << "TARGET_VAL(" << Offset << "),\n";
766 OS.indent(FullIndexWidth + Indent);
767 }
768 }
769 const EmitNodeMatcherCommon *EN = cast<EmitNodeMatcherCommon>(N);
770 OS << (isa<EmitNodeMatcher>(EN) ? "OPC_EmitNode" : "OPC_MorphNodeTo");
771 bool CompressVTs = EN->getNumVTs() < 3;
772 if (CompressVTs)
773 OS << EN->getNumVTs();
774
775 OS << ", TARGET_VAL(" << EN->getOpcodeName() << "), 0";
776
777 if (EN->hasChain()) OS << "|OPFL_Chain";
778 if (EN->hasInFlag()) OS << "|OPFL_GlueInput";
779 if (EN->hasOutFlag()) OS << "|OPFL_GlueOutput";
780 if (EN->hasMemRefs()) OS << "|OPFL_MemRefs";
781 if (EN->getNumFixedArityOperands() != -1)
782 OS << "|OPFL_Variadic" << EN->getNumFixedArityOperands();
783 OS << ",\n";
784
785 OS.indent(FullIndexWidth + Indent+4);
786 if (!CompressVTs) {
787 OS << EN->getNumVTs();
788 if (!OmitComments)
789 OS << "/*#VTs*/";
790 OS << ", ";
791 }
792 for (unsigned i = 0, e = EN->getNumVTs(); i != e; ++i)
793 OS << getEnumName(EN->getVT(i)) << ", ";
794
795 OS << EN->getNumOperands();
796 if (!OmitComments)
797 OS << "/*#Ops*/";
798 OS << ", ";
799 unsigned NumOperandBytes = 0;
800 for (unsigned i = 0, e = EN->getNumOperands(); i != e; ++i)
801 NumOperandBytes += EmitVBRValue(EN->getOperand(i), OS);
802
803 if (!OmitComments) {
804 // Print the result #'s for EmitNode.
805 if (const EmitNodeMatcher *E = dyn_cast<EmitNodeMatcher>(EN)) {
806 if (unsigned NumResults = EN->getNumVTs()) {
807 OS << " // Results =";
808 unsigned First = E->getFirstResultSlot();
809 for (unsigned i = 0; i != NumResults; ++i)
810 OS << " #" << First+i;
811 }
812 }
813 OS << '\n';
814
815 if (const MorphNodeToMatcher *SNT = dyn_cast<MorphNodeToMatcher>(N)) {
816 OS.indent(FullIndexWidth + Indent) << "// Src: "
817 << *SNT->getPattern().getSrcPattern() << " - Complexity = "
818 << SNT->getPattern().getPatternComplexity(CGP) << '\n';
819 OS.indent(FullIndexWidth + Indent) << "// Dst: "
820 << *SNT->getPattern().getDstPattern() << '\n';
821 }
822 } else
823 OS << '\n';
824
825 return 5 + !CompressVTs + EN->getNumVTs() + NumOperandBytes +
826 NumCoveredBytes;
827 }
828 case Matcher::CompleteMatch: {
829 const CompleteMatchMatcher *CM = cast<CompleteMatchMatcher>(N);
830 auto NumCoveredBytes = 0;
831 if (InstrumentCoverage) {
832 NumCoveredBytes = 3;
833 OS << "OPC_Coverage, ";
834 std::string src =
835 GetPatFromTreePatternNode(CM->getPattern().getSrcPattern());
836 std::string dst =
837 GetPatFromTreePatternNode(CM->getPattern().getDstPattern());
838 Record *PatRecord = CM->getPattern().getSrcRecord();
839 std::string include_src = getIncludePath(PatRecord);
840 unsigned Offset =
841 getPatternIdxFromTable(src + " -> " + dst, std::move(include_src));
842 OS << "TARGET_VAL(" << Offset << "),\n";
843 OS.indent(FullIndexWidth + Indent);
844 }
845 OS << "OPC_CompleteMatch, " << CM->getNumResults() << ", ";
846 unsigned NumResultBytes = 0;
847 for (unsigned i = 0, e = CM->getNumResults(); i != e; ++i)
848 NumResultBytes += EmitVBRValue(CM->getResult(i), OS);
849 OS << '\n';
850 if (!OmitComments) {
851 OS.indent(FullIndexWidth + Indent) << " // Src: "
852 << *CM->getPattern().getSrcPattern() << " - Complexity = "
853 << CM->getPattern().getPatternComplexity(CGP) << '\n';
854 OS.indent(FullIndexWidth + Indent) << " // Dst: "
855 << *CM->getPattern().getDstPattern();
856 }
857 OS << '\n';
858 return 2 + NumResultBytes + NumCoveredBytes;
859 }
860 }
861 llvm_unreachable("Unreachable")::llvm::llvm_unreachable_internal("Unreachable", "llvm/utils/TableGen/DAGISelMatcherEmitter.cpp"
, 861);
862}
863
864/// This function traverses the matcher tree and emits all the nodes.
865/// The nodes have already been sized.
866unsigned MatcherTableEmitter::
867EmitMatcherList(const Matcher *N, const unsigned Indent, unsigned CurrentIdx,
868 raw_ostream &OS) {
869 unsigned Size = 0;
870 while (N) {
871 if (!OmitComments)
872 OS << "/*" << format_decimal(CurrentIdx, IndexWidth) << "*/";
873 unsigned MatcherSize = EmitMatcher(N, Indent, CurrentIdx, OS);
874 Size += MatcherSize;
875 CurrentIdx += MatcherSize;
876
877 // If there are other nodes in this list, iterate to them, otherwise we're
878 // done.
879 N = N->getNext();
880 }
881 return Size;
882}
883
884void MatcherTableEmitter::EmitNodePredicatesFunction(
885 const std::vector<TreePredicateFn> &Preds, StringRef Decl,
886 raw_ostream &OS) {
887 if (Preds.empty())
888 return;
889
890 BeginEmitFunction(OS, "bool", Decl, true/*AddOverride*/);
891 OS << "{\n";
892 OS << " switch (PredNo) {\n";
893 OS << " default: llvm_unreachable(\"Invalid predicate in table?\");\n";
894 for (unsigned i = 0, e = Preds.size(); i != e; ++i) {
895 // Emit the predicate code corresponding to this pattern.
896 const TreePredicateFn PredFn = Preds[i];
897 assert(!PredFn.isAlwaysTrue() && "No code in this predicate")(static_cast <bool> (!PredFn.isAlwaysTrue() && "No code in this predicate"
) ? void (0) : __assert_fail ("!PredFn.isAlwaysTrue() && \"No code in this predicate\""
, "llvm/utils/TableGen/DAGISelMatcherEmitter.cpp", 897, __extension__
__PRETTY_FUNCTION__));
898 std::string PredFnCodeStr = PredFn.getCodeToRunOnSDNode();
899
900 OS << " case " << i << ": {\n";
901 for (auto *SimilarPred : NodePredicatesByCodeToRun[PredFnCodeStr])
902 OS << " // " << TreePredicateFn(SimilarPred).getFnName() << '\n';
903 OS << PredFnCodeStr << "\n }\n";
904 }
905 OS << " }\n";
906 OS << "}\n";
907 EndEmitFunction(OS);
908}
909
910void MatcherTableEmitter::EmitPredicateFunctions(raw_ostream &OS) {
911 // Emit pattern predicates.
912 if (!PatternPredicates.empty()) {
913 BeginEmitFunction(OS, "bool",
914 "CheckPatternPredicate(unsigned PredNo) const", true/*AddOverride*/);
915 OS << "{\n";
916 OS << " switch (PredNo) {\n";
917 OS << " default: llvm_unreachable(\"Invalid predicate in table?\");\n";
918 for (unsigned i = 0, e = PatternPredicates.size(); i != e; ++i)
919 OS << " case " << i << ": return " << PatternPredicates[i] << ";\n";
920 OS << " }\n";
921 OS << "}\n";
922 EndEmitFunction(OS);
923 }
924
925 // Emit Node predicates.
926 EmitNodePredicatesFunction(
927 NodePredicates, "CheckNodePredicate(SDNode *Node, unsigned PredNo) const",
928 OS);
929 EmitNodePredicatesFunction(
930 NodePredicatesWithOperands,
931 "CheckNodePredicateWithOperands(SDNode *Node, unsigned PredNo, "
932 "const SmallVectorImpl<SDValue> &Operands) const",
933 OS);
934
935 // Emit CompletePattern matchers.
936 // FIXME: This should be const.
937 if (!ComplexPatterns.empty()) {
938 BeginEmitFunction(OS, "bool",
939 "CheckComplexPattern(SDNode *Root, SDNode *Parent,\n"
940 " SDValue N, unsigned PatternNo,\n"
941 " SmallVectorImpl<std::pair<SDValue, SDNode *>> &Result)",
942 true/*AddOverride*/);
943 OS << "{\n";
944 OS << " unsigned NextRes = Result.size();\n";
945 OS << " switch (PatternNo) {\n";
946 OS << " default: llvm_unreachable(\"Invalid pattern # in table?\");\n";
947 for (unsigned i = 0, e = ComplexPatterns.size(); i != e; ++i) {
948 const ComplexPattern &P = *ComplexPatterns[i];
949 unsigned NumOps = P.getNumOperands();
950
951 if (P.hasProperty(SDNPHasChain))
952 ++NumOps; // Get the chained node too.
953
954 OS << " case " << i << ":\n";
955 if (InstrumentCoverage)
956 OS << " {\n";
957 OS << " Result.resize(NextRes+" << NumOps << ");\n";
958 if (InstrumentCoverage)
959 OS << " bool Succeeded = " << P.getSelectFunc();
960 else
961 OS << " return " << P.getSelectFunc();
962
963 OS << "(";
964 // If the complex pattern wants the root of the match, pass it in as the
965 // first argument.
966 if (P.hasProperty(SDNPWantRoot))
967 OS << "Root, ";
968
969 // If the complex pattern wants the parent of the operand being matched,
970 // pass it in as the next argument.
971 if (P.hasProperty(SDNPWantParent))
972 OS << "Parent, ";
973
974 OS << "N";
975 for (unsigned i = 0; i != NumOps; ++i)
976 OS << ", Result[NextRes+" << i << "].first";
977 OS << ");\n";
978 if (InstrumentCoverage) {
979 OS << " if (Succeeded)\n";
980 OS << " dbgs() << \"\\nCOMPLEX_PATTERN: " << P.getSelectFunc()
981 << "\\n\" ;\n";
982 OS << " return Succeeded;\n";
983 OS << " }\n";
984 }
985 }
986 OS << " }\n";
987 OS << "}\n";
988 EndEmitFunction(OS);
989 }
990
991
992 // Emit SDNodeXForm handlers.
993 // FIXME: This should be const.
994 if (!NodeXForms.empty()) {
995 BeginEmitFunction(OS, "SDValue",
996 "RunSDNodeXForm(SDValue V, unsigned XFormNo)", true/*AddOverride*/);
997 OS << "{\n";
998 OS << " switch (XFormNo) {\n";
999 OS << " default: llvm_unreachable(\"Invalid xform # in table?\");\n";
1000
1001 // FIXME: The node xform could take SDValue's instead of SDNode*'s.
1002 for (unsigned i = 0, e = NodeXForms.size(); i != e; ++i) {
1003 const CodeGenDAGPatterns::NodeXForm &Entry =
1004 CGP.getSDNodeTransform(NodeXForms[i]);
1005
1006 Record *SDNode = Entry.first;
1007 const std::string &Code = Entry.second;
1008
1009 OS << " case " << i << ": { ";
1010 if (!OmitComments)
1011 OS << "// " << NodeXForms[i]->getName();
1012 OS << '\n';
1013
1014 std::string ClassName =
1015 std::string(CGP.getSDNodeInfo(SDNode).getSDClassName());
1016 if (ClassName == "SDNode")
1017 OS << " SDNode *N = V.getNode();\n";
1018 else
1019 OS << " " << ClassName << " *N = cast<" << ClassName
1020 << ">(V.getNode());\n";
1021 OS << Code << "\n }\n";
1022 }
1023 OS << " }\n";
1024 OS << "}\n";
1025 EndEmitFunction(OS);
1026 }
1027}
1028
1029static StringRef getOpcodeString(Matcher::KindTy Kind) {
1030 switch (Kind) {
1031 case Matcher::Scope: return "OPC_Scope"; break;
1032 case Matcher::RecordNode: return "OPC_RecordNode"; break;
1033 case Matcher::RecordChild: return "OPC_RecordChild"; break;
1034 case Matcher::RecordMemRef: return "OPC_RecordMemRef"; break;
1035 case Matcher::CaptureGlueInput: return "OPC_CaptureGlueInput"; break;
1036 case Matcher::MoveChild: return "OPC_MoveChild"; break;
1037 case Matcher::MoveParent: return "OPC_MoveParent"; break;
1038 case Matcher::CheckSame: return "OPC_CheckSame"; break;
1039 case Matcher::CheckChildSame: return "OPC_CheckChildSame"; break;
1040 case Matcher::CheckPatternPredicate:
1041 return "OPC_CheckPatternPredicate"; break;
1042 case Matcher::CheckPredicate: return "OPC_CheckPredicate"; break;
1043 case Matcher::CheckOpcode: return "OPC_CheckOpcode"; break;
1044 case Matcher::SwitchOpcode: return "OPC_SwitchOpcode"; break;
1045 case Matcher::CheckType: return "OPC_CheckType"; break;
1046 case Matcher::SwitchType: return "OPC_SwitchType"; break;
1047 case Matcher::CheckChildType: return "OPC_CheckChildType"; break;
1048 case Matcher::CheckInteger: return "OPC_CheckInteger"; break;
1049 case Matcher::CheckChildInteger: return "OPC_CheckChildInteger"; break;
1050 case Matcher::CheckCondCode: return "OPC_CheckCondCode"; break;
1051 case Matcher::CheckChild2CondCode: return "OPC_CheckChild2CondCode"; break;
1052 case Matcher::CheckValueType: return "OPC_CheckValueType"; break;
1053 case Matcher::CheckComplexPat: return "OPC_CheckComplexPat"; break;
1054 case Matcher::CheckAndImm: return "OPC_CheckAndImm"; break;
1055 case Matcher::CheckOrImm: return "OPC_CheckOrImm"; break;
1056 case Matcher::CheckFoldableChainNode:
1057 return "OPC_CheckFoldableChainNode"; break;
1058 case Matcher::CheckImmAllOnesV: return "OPC_CheckImmAllOnesV"; break;
1059 case Matcher::CheckImmAllZerosV: return "OPC_CheckImmAllZerosV"; break;
1060 case Matcher::EmitInteger: return "OPC_EmitInteger"; break;
1061 case Matcher::EmitStringInteger: return "OPC_EmitStringInteger"; break;
1062 case Matcher::EmitRegister: return "OPC_EmitRegister"; break;
1063 case Matcher::EmitConvertToTarget: return "OPC_EmitConvertToTarget"; break;
1064 case Matcher::EmitMergeInputChains: return "OPC_EmitMergeInputChains"; break;
1065 case Matcher::EmitCopyToReg: return "OPC_EmitCopyToReg"; break;
1066 case Matcher::EmitNode: return "OPC_EmitNode"; break;
1067 case Matcher::MorphNodeTo: return "OPC_MorphNodeTo"; break;
1068 case Matcher::EmitNodeXForm: return "OPC_EmitNodeXForm"; break;
1069 case Matcher::CompleteMatch: return "OPC_CompleteMatch"; break;
1070 }
1071
1072 llvm_unreachable("Unhandled opcode?")::llvm::llvm_unreachable_internal("Unhandled opcode?", "llvm/utils/TableGen/DAGISelMatcherEmitter.cpp"
, 1072);
1073}
1074
1075void MatcherTableEmitter::EmitHistogram(const Matcher *M,
1076 raw_ostream &OS) {
1077 if (OmitComments)
1078 return;
1079
1080 OS << " // Opcode Histogram:\n";
1081 for (unsigned i = 0, e = OpcodeCounts.size(); i != e; ++i) {
1082 OS << " // #"
1083 << left_justify(getOpcodeString((Matcher::KindTy)i), HistOpcWidth)
1084 << " = " << OpcodeCounts[i] << '\n';
1085 }
1086 OS << '\n';
1087}
1088
1089
1090void llvm::EmitMatcherTable(Matcher *TheMatcher,
1091 const CodeGenDAGPatterns &CGP,
1092 raw_ostream &OS) {
1093 OS << "#if defined(GET_DAGISEL_DECL) && defined(GET_DAGISEL_BODY)\n";
1094 OS << "#error GET_DAGISEL_DECL and GET_DAGISEL_BODY cannot be both defined, ";
1095 OS << "undef both for inline definitions\n";
1096 OS << "#endif\n\n";
1097
1098 // Emit a check for omitted class name.
1099 OS << "#ifdef GET_DAGISEL_BODY\n";
1100 OS << "#define LOCAL_DAGISEL_STRINGIZE(X) LOCAL_DAGISEL_STRINGIZE_(X)\n";
1101 OS << "#define LOCAL_DAGISEL_STRINGIZE_(X) #X\n";
1102 OS << "static_assert(sizeof(LOCAL_DAGISEL_STRINGIZE(GET_DAGISEL_BODY)) > 1,"
1103 "\n";
1104 OS << " \"GET_DAGISEL_BODY is empty: it should be defined with the class "
1105 "name\");\n";
1106 OS << "#undef LOCAL_DAGISEL_STRINGIZE_\n";
1107 OS << "#undef LOCAL_DAGISEL_STRINGIZE\n";
1108 OS << "#endif\n\n";
1109
1110 OS << "#if !defined(GET_DAGISEL_DECL) && !defined(GET_DAGISEL_BODY)\n";
1111 OS << "#define DAGISEL_INLINE 1\n";
1112 OS << "#else\n";
1113 OS << "#define DAGISEL_INLINE 0\n";
1114 OS << "#endif\n\n";
1115
1116 OS << "#if !DAGISEL_INLINE\n";
1117 OS << "#define DAGISEL_CLASS_COLONCOLON GET_DAGISEL_BODY ::\n";
1118 OS << "#else\n";
1119 OS << "#define DAGISEL_CLASS_COLONCOLON\n";
1120 OS << "#endif\n\n";
1121
1122 BeginEmitFunction(OS, "void", "SelectCode(SDNode *N)", false/*AddOverride*/);
1123 MatcherTableEmitter MatcherEmitter(CGP);
1124
1125 // First we size all the children of the three kinds of matchers that have
1126 // them. This is done by sharing the code in EmitMatcher(). but we don't
1127 // want to emit anything, so we turn off comments and use a null stream.
1128 bool SaveOmitComments = OmitComments;
1129 OmitComments = true;
1130 raw_null_ostream NullOS;
1131 unsigned TotalSize = MatcherEmitter.SizeMatcherList(TheMatcher, NullOS);
Value stored to 'TotalSize' during its initialization is never read
1132 OmitComments = SaveOmitComments;
1133
1134 // Now that the matchers are sized, we can emit the code for them to the
1135 // final stream.
1136 OS << "{\n";
1137 OS << " // Some target values are emitted as 2 bytes, TARGET_VAL handles\n";
1138 OS << " // this.\n";
1139 OS << " #define TARGET_VAL(X) X & 255, unsigned(X) >> 8\n";
1140 OS << " static const unsigned char MatcherTable[] = {\n";
1141 TotalSize = MatcherEmitter.EmitMatcherList(TheMatcher, 1, 0, OS);
1142 OS << " 0\n }; // Total Array size is " << (TotalSize+1) << " bytes\n\n";
1143
1144 MatcherEmitter.EmitHistogram(TheMatcher, OS);
1145
1146 OS << " #undef TARGET_VAL\n";
1147 OS << " SelectCodeCommon(N, MatcherTable,sizeof(MatcherTable));\n";
1148 OS << "}\n";
1149 EndEmitFunction(OS);
1150
1151 // Next up, emit the function for node and pattern predicates:
1152 MatcherEmitter.EmitPredicateFunctions(OS);
1153
1154 if (InstrumentCoverage)
1155 MatcherEmitter.EmitPatternMatchTable(OS);
1156
1157 // Clean up the preprocessor macros.
1158 OS << "\n";
1159 OS << "#ifdef DAGISEL_INLINE\n";
1160 OS << "#undef DAGISEL_INLINE\n";
1161 OS << "#endif\n";
1162 OS << "#ifdef DAGISEL_CLASS_COLONCOLON\n";
1163 OS << "#undef DAGISEL_CLASS_COLONCOLON\n";
1164 OS << "#endif\n";
1165 OS << "#ifdef GET_DAGISEL_DECL\n";
1166 OS << "#undef GET_DAGISEL_DECL\n";
1167 OS << "#endif\n";
1168 OS << "#ifdef GET_DAGISEL_BODY\n";
1169 OS << "#undef GET_DAGISEL_BODY\n";
1170 OS << "#endif\n";
1171}