GCC Code Coverage Report

Directory: ../
Coverage: low: ≥ 0% medium: ≥ 75.0% high: ≥ 90.0%
Coverage Exec / Excl / Total
Lines: 78.1% 261 / 1 / 335
Functions: 92.3% 12 / 0 / 13
Branches: 45.8% 288 / 4 / 633
src/irgenerator/DebugInfoGenerator.cpp
Line Branch Exec Source
1 // Copyright (c) 2021-2026 ChilliBits. All rights reserved.
2
3 #include "DebugInfoGenerator.h"
4
5 #include <driver/Driver.h>
6 #include <irgenerator/IRGenerator.h>
7 #include <irgenerator/NameMangling.h>
8 #include <model/Function.h>
9 #include <model/Struct.h>
10 #include <model/Union.h>
11 #include <util/CustomHashFunctions.h>
12 #include <util/FileUtil.h>
13
14 #include <llvm/BinaryFormat/Dwarf.h>
15 #include <llvm/IR/Module.h>
16
17 namespace spice::compiler {
18
19
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 5791 DebugInfoGenerator::DebugInfoGenerator(IRGenerator *irGenerator) : irGenerator(irGenerator) {}
20
21 2923 void DebugInfoGenerator::initialize(const std::string &sourceFileName, std::filesystem::path sourceFileDir) {
22 2923 llvm::Module *module = irGenerator->module;
23 2923 llvm::LLVMContext &context = irGenerator->context;
24
25 // Create DIBuilder
26
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 2923 diBuilder = std::make_unique<llvm::DIBuilder>(*module);
27
28 // Create compilation unit
29
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 2923 std::filesystem::path absolutePath = absolute(sourceFileDir / sourceFileName);
30 2923 absolutePath.make_preferred();
31 2923 sourceFileDir.make_preferred();
32
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 5846 llvm::DIFile *cuDiFile = diBuilder->createFile(absolutePath.string(), sourceFileDir.string());
33 2923 const bool fullDebugInfo = irGenerator->cliOptions.instrumentation.emitsFullDebugInfo();
34
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 2923 const auto emissionKind = fullDebugInfo ? llvm::DICompileUnit::FullDebug : llvm::DICompileUnit::LineTablesOnly;
35 2923 const bool isOptimized = irGenerator->cliOptions.optLevel > OptLevel::O0;
36
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 5846 compileUnit = diBuilder->createCompileUnit(llvm::dwarf::DW_LANG_C_plus_plus_14, cuDiFile, PRODUCER_STRING, isOptimized, "", 0,
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 2923 "", emissionKind, 0, false, false, llvm::DICompileUnit::DebugNameTableKind::None);
38
39
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 2923 module->addModuleFlag(llvm::Module::Max, "Dwarf Version", 5);
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 2923 module->addModuleFlag(llvm::Module::Warning, "Debug Info Version", llvm::DEBUG_METADATA_VERSION);
41
42 // Create another DIFile as scope for subprograms
43
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 5846 diFile = diBuilder->createFile(sourceFileName, sourceFileDir.string());
44
45
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 2923 pointerWidth = irGenerator->module->getDataLayout().getPointerSizeInBits();
46
47 // Line tables do not carry any type information, so there is no need to build the debug types at all
48
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 2923 if (!fullDebugInfo)
49 2807 return;
50
51 // Initialize primitive debug types
52
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 116 doubleTy = diBuilder->createBasicType("double", 64, llvm::dwarf::DW_ATE_float);
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 116 intTy = diBuilder->createBasicType("int", 32, llvm::dwarf::DW_ATE_signed);
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 116 uIntTy = diBuilder->createBasicType("unsigned int", 32, llvm::dwarf::DW_ATE_unsigned);
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 116 shortTy = diBuilder->createBasicType("short", 16, llvm::dwarf::DW_ATE_signed);
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 116 uShortTy = diBuilder->createBasicType("unsigned short", 16, llvm::dwarf::DW_ATE_unsigned);
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 116 longTy = diBuilder->createBasicType("long", 64, llvm::dwarf::DW_ATE_signed);
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 116 uLongTy = diBuilder->createBasicType("unsigned long", 64, llvm::dwarf::DW_ATE_unsigned);
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 116 byteTy = diBuilder->createBasicType("byte", 8, llvm::dwarf::DW_ATE_unsigned);
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 116 charTy = diBuilder->createBasicType("char", 8, llvm::dwarf::DW_ATE_unsigned_char);
61
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 232 stringTy = diBuilder->createPointerType(charTy, pointerWidth);
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 116 boolTy = diBuilder->createBasicType("bool", 8, llvm::dwarf::DW_ATE_boolean);
63
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 116 voidTy = diBuilder->createBasicType("void", 0, llvm::dwarf::DW_ATE_unsigned);
64
65 // Initialize lambda fat ptr type
66
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 116 llvm::PointerType *ptrTy = irGenerator->builder.getPtrTy();
67
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 116 llvm::IntegerType *int64Ty = irGenerator->builder.getInt64Ty();
68 116 const llvm::DataLayout &dataLayout = module->getDataLayout();
69
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 116 const llvm::StructLayout *structLayout = dataLayout.getStructLayout(irGenerator->llvmTypes.lambdaFatPtrType);
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 116 const uint32_t alignInBits = dataLayout.getABITypeAlign(irGenerator->llvmTypes.lambdaFatPtrType).value();
71
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 116 const uint32_t ptrAlignInBits = dataLayout.getABITypeAlign(ptrTy).value();
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 116 const uint32_t int64Width = dataLayout.getTypeSizeInBits(int64Ty);
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 116 const uint32_t int64AlignInBits = dataLayout.getABITypeAlign(int64Ty).value();
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 116 const uint64_t fctPtrOffset = structLayout->getElementOffsetInBits(0);
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 116 const uint64_t capturesOffset = structLayout->getElementOffsetInBits(1);
76
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 116 const uint64_t captureSizeOffset = structLayout->getElementOffsetInBits(2);
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78
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 232 llvm::DIType *voidPtrDIType = diBuilder->createPointerType(voidTy, pointerWidth, ptrAlignInBits);
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 232 fatPtrTy = diBuilder->createStructType(diFile, "_lambda", diFile, 0, structLayout->getSizeInBits(), alignInBits,
80 llvm::DINode::FlagTypePassByValue | llvm::DINode::FlagNonTrivial, nullptr, {}, 0,
81
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 116 nullptr, "_lambda");
82
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 116 const auto firstType = diBuilder->createMemberType(fatPtrTy, "fct", diFile, 0, pointerWidth, ptrAlignInBits, fctPtrOffset,
83 llvm::DINode::FlagZero, voidPtrDIType);
84
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 116 const auto secondType = diBuilder->createMemberType(fatPtrTy, "captures", diFile, 0, pointerWidth, ptrAlignInBits,
85 capturesOffset, llvm::DINode::FlagZero, voidPtrDIType);
86
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 116 const auto thirdType = diBuilder->createMemberType(fatPtrTy, "captureSize", diFile, 0, int64Width, int64AlignInBits,
87 captureSizeOffset, llvm::DINode::FlagZero, uLongTy);
88
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 116 fatPtrTy->replaceElements(llvm::MDTuple::get(context, {firstType, secondType, thirdType}));
89
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 2923 }
90
91 88131 void DebugInfoGenerator::generateFunctionDebugInfo(llvm::Function *llvmFunction, const Function *spiceFunc, bool isLambda) {
92
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 176262 if (!irGenerator->cliOptions.instrumentation.emitsDebugInfo())
93 43179 return;
94
95 44958 const ASTNode *node = spiceFunc->declNode;
96 // Compiler-synthesized functions without a source declaration (e.g. the generated test-suite main) have no code
97 // location to attach debug info to, so skip them
98
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 44958 if (!node)
99 6 return;
100
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 44952 const uint32_t lineNo = spiceFunc->getDeclCodeLoc().line;
101
102 // Prepare flags
103 44952 llvm::DIScope *scope = diFile;
104 44952 llvm::DINode::DIFlags flags = llvm::DINode::FlagPrototyped;
105
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 44952 if (spiceFunc->entry && spiceFunc->entry->getQualType().isPublic())
106
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 39639 flags |= llvm::DINode::FlagPublic;
107
108 // Prepare spFlags
109 44952 llvm::DISubprogram::DISPFlags spFlags = llvm::DISubprogram::SPFlagDefinition;
110
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 44952 if (isLambda)
111
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 93 spFlags |= llvm::DISubprogram::SPFlagLocalToUnit;
112
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 44952 if (spiceFunc->isVirtual) {
113
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 3085 if (spiceFunc->thisType.is(TY_INTERFACE))
114 ✗ spFlags |= llvm::DISubprogram::SPFlagPureVirtual;
115 else
116
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 3085 spFlags |= llvm::DISubprogram::SPFlagVirtual;
117 }
118
119 // Collect arguments. In line info only mode, the subroutine type stays empty, since no type info is emitted at all
120 44952 std::vector<llvm::Metadata *> argTypes;
121
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 89904 if (irGenerator->cliOptions.instrumentation.emitsFullDebugInfo()) {
122
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 1770 if (spiceFunc->isProcedure())
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 823 argTypes.push_back(voidTy);
124 else
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 947 argTypes.push_back(getDITypeForQualType(node, spiceFunc->returnType)); // Add result type
126
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 1770 if (spiceFunc->isMethod())
127
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 1259 argTypes.push_back(getDITypeForQualType(node, spiceFunc->thisType)); // Add this type
128
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 1770 if (isLambda) {
129 ✗ llvm::DICompositeType *captureStructType = generateCaptureStructDebugInfo(spiceFunc);
130 ✗ scope = captureStructType;
131 ✗ llvm::DIType *captureStructPtr = diBuilder->createPointerType(captureStructType, pointerWidth);
132 ✗ argTypes.push_back(captureStructPtr); // Add this type
133 }
134
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 5106 for (const QualType &argType : spiceFunc->getParamTypes()) // Add arg types
135
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 3336 argTypes.push_back(getDITypeForQualType(node, argType));
136 }
137
138 // Create function type
139
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 44952 llvm::DISubroutineType *functionTy = diBuilder->createSubroutineType(diBuilder->getOrCreateTypeArray(argTypes));
140
141
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 44952 const std::string mangledName = spiceFunc->getMangledName();
142 llvm::DISubprogram *subprogram;
143
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 44952 const std::string &name = spiceFunc->name;
144
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 44952 if (spiceFunc->isMethod()) {
145
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 29993 subprogram = diBuilder->createMethod(scope, name, mangledName, diFile, lineNo, functionTy, 0, 0, nullptr, flags, spFlags);
146 } else {
147
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 29918 subprogram = diBuilder->createFunction(scope, name, mangledName, diFile, lineNo, functionTy, lineNo, flags, spFlags);
148 }
149
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 44952 subprogram->replaceRetainedNodes({});
150
151 // Add debug info to LLVM function
152
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 44952 llvmFunction->setSubprogram(subprogram);
153 // Add scope to lexicalBlocks
154
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 44952 lexicalBlocks.push(subprogram);
155 44952 }
156
157 88608 void DebugInfoGenerator::concludeFunctionDebugInfo() {
158
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 177216 if (!irGenerator->cliOptions.instrumentation.emitsDebugInfo())
159 43650 return;
160 // Functions generateFunctionDebugInfo skipped (no declNode, see there) never pushed a scope to conclude here.
161
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 44958 if (lexicalBlocks.empty())
162 6 return;
163
164 44952 lexicalBlocks.pop();
165 }
166
167 80175 void DebugInfoGenerator::pushLexicalBlock(const ASTNode *node) {
168 // Line tables do not carry scope info, so we attach all locations to the enclosing subprogram instead
169
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 160350 if (!irGenerator->cliOptions.instrumentation.emitsFullDebugInfo())
170 78373 return;
171
172 1802 const uint32_t line = node->codeLoc.line;
173 1802 const uint32_t col = node->codeLoc.col;
174 1802 llvm::DILexicalBlock *lexicalBlock = diBuilder->createLexicalBlock(lexicalBlocks.top(), diFile, line, col);
175
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 1802 lexicalBlocks.push(lexicalBlock);
176 }
177
178 80175 void DebugInfoGenerator::popLexicalBlock() {
179
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 160350 if (!irGenerator->cliOptions.instrumentation.emitsFullDebugInfo())
180 78373 return;
181
182
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 1802 assert(!lexicalBlocks.empty());
183 1802 lexicalBlocks.pop();
184 }
185
186 ✗ llvm::DICompositeType *DebugInfoGenerator::generateCaptureStructDebugInfo(const Function *spiceFunc) {
187 ✗ const CaptureMap &captures = spiceFunc->bodyScope->symbolTable.captures;
188 ✗ const ASTNode *node = spiceFunc->declNode;
189 ✗ const uint32_t lineNo = node->codeLoc.line;
190
191 // Get LLVM type for struct
192 ✗ std::vector<llvm::Type *> fieldTypes;
193 ✗ std::vector<const SymbolTableEntry *> fieldEntries;
194 ✗ QualTypeList fieldSymbolTypes;
195 ✗ for (const auto &capture : captures | std::views::values) {
196 ✗ QualType captureType = capture.capturedSymbol->getQualType();
197
198 // Capture by reference
199 ✗ if (capture.getMode() == BY_REFERENCE)
200 ✗ captureType = captureType.toRef(node);
201
202 ✗ fieldEntries.push_back(capture.capturedSymbol);
203 ✗ fieldSymbolTypes.push_back(captureType);
204 ✗ fieldTypes.push_back(captureType.toLLVMType(irGenerator->sourceFile));
205 }
206 ✗ llvm::StructType *structType = llvm::StructType::get(irGenerator->context, fieldTypes);
207 ✗ const llvm::StructLayout *structLayout = irGenerator->module->getDataLayout().getStructLayout(structType);
208 ✗ const size_t alignInBits = irGenerator->module->getDataLayout().getABITypeAlign(structType).value();
209
210 ✗ llvm::DIScope *scope = lexicalBlocks.top();
211 llvm::DICompositeType *structDiType =
212 ✗ diBuilder->createClassType(scope, "", diFile, lineNo, structLayout->getSizeInBits(), alignInBits, 0,
213 llvm::DINode::FlagTypePassByValue | llvm::DINode::FlagNonTrivial, nullptr, {});
214
215 ✗ std::vector<llvm::Metadata *> fieldDITypes;
216 ✗ for (size_t i = 0; i < fieldEntries.size(); i++) {
217 ✗ llvm::DIType *fieldDiType = getDITypeForQualType(node, fieldSymbolTypes.at(i));
218 ✗ const std::string &fieldName = fieldEntries.at(i)->name;
219 ✗ const size_t offsetInBits = structLayout->getElementOffsetInBits(i);
220 ✗ const size_t fieldSize = fieldDiType->getSizeInBits();
221 ✗ const size_t fieldAlign = fieldDiType->getAlignInBits();
222 ✗ llvm::DIDerivedType *fieldDiDerivedType = diBuilder->createMemberType(
223 ✗ structDiType, fieldName, diFile, lineNo, fieldSize, fieldAlign, offsetInBits, llvm::DINode::FlagZero, fieldDiType);
224 ✗ fieldDITypes.push_back(fieldDiDerivedType);
225 }
226 ✗ structDiType->replaceElements(llvm::MDTuple::get(irGenerator->context, fieldDITypes));
227
228 ✗ return structDiType;
229 ✗ }
230
231 6223 void DebugInfoGenerator::generateGlobalVarDebugInfo(llvm::GlobalVariable *global, const SymbolTableEntry *globalEntry) {
232
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 12446 if (!irGenerator->cliOptions.instrumentation.emitsFullDebugInfo())
233 6162 return;
234
235
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 61 const uint32_t lineNo = globalEntry->getDeclCodeLoc().line;
236
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 61 const llvm::StringRef name = global->getName();
237
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 61 llvm::DIType *type = getDITypeForQualType(globalEntry->declNode, globalEntry->getQualType());
238
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 61 const bool isLocal = globalEntry->getQualType().isPublic();
239
240
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 61 global->addDebugInfo(diBuilder->createGlobalVariableExpression(compileUnit, name, name, diFile, lineNo, type, isLocal));
241 }
242
243 283 void DebugInfoGenerator::generateGlobalStringDebugInfo(llvm::GlobalVariable *global, const std::string &name, size_t length,
244 const CodeLoc &codeLoc) const {
245 283 const uint32_t lineNo = codeLoc.line;
246 283 const size_t sizeInBits = (length + 1) * 8; // +1 because of null-terminator
247
248
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 283 llvm::DIStringType *stringType = diBuilder->createStringType(name, sizeInBits);
249
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 283 global->addDebugInfo(diBuilder->createGlobalVariableExpression(compileUnit, name, name, diFile, lineNo, stringType, true));
250 283 }
251
252 220448 void DebugInfoGenerator::generateLocalVarDebugInfo(const std::string &varName, llvm::Value *address, size_t argNumber) {
253
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 440896 if (!irGenerator->cliOptions.instrumentation.emitsFullDebugInfo())
254 216267 return;
255
256 // Get symbol table entry
257 4181 const SymbolTableEntry *variableEntry = irGenerator->currentScope->lookupStrict(varName);
258
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 4181 assert(variableEntry != nullptr);
259 // Build debug info
260 4181 llvm::DIScope *scope = lexicalBlocks.top();
261 4181 llvm::DIType *diType = getDITypeForQualType(variableEntry->declNode, variableEntry->getQualType());
262 4181 const uint32_t lineNo = variableEntry->declNode->codeLoc.line;
263
264 llvm::DILocalVariable *varInfo;
265
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 4181 if (argNumber != SIZE_MAX)
266
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 2823 varInfo = diBuilder->createParameterVariable(scope, varName, argNumber, diFile, lineNo, diType);
267 else
268
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 1358 varInfo = diBuilder->createAutoVariable(scope, varName, diFile, lineNo, diType);
269
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 4181 llvm::DIExpression *expr = diBuilder->createExpression();
270
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 4181 const llvm::DILocation *debugLocation = irGenerator->builder.getCurrentDebugLocation();
271
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 4181 assert(debugLocation != nullptr);
272
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 4181 diBuilder->insertDeclare(address, varInfo, expr, debugLocation, irGenerator->builder.GetInsertPoint());
273 }
274
275 1992570 void DebugInfoGenerator::setSourceLocation(const CodeLoc &codeLoc) {
276
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 3985140 if (!irGenerator->cliOptions.instrumentation.emitsDebugInfo())
277 981170 return;
278
279
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 1011400 assert(!lexicalBlocks.empty());
280 1011400 llvm::DIScope *scope = lexicalBlocks.top();
281 1011400 const llvm::DILocation *diCodeLoc = llvm::DILocation::get(scope->getContext(), codeLoc.line, codeLoc.col, scope);
282 1011400 irGenerator->builder.SetCurrentDebugLocation(diCodeLoc);
283 }
284
285 5791 void DebugInfoGenerator::finalize() const {
286
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 11582 if (irGenerator->cliOptions.instrumentation.emitsDebugInfo())
287 2923 diBuilder->finalize();
288 5791 }
289
290 15329 llvm::DIType *DebugInfoGenerator::getDITypeForQualType(const ASTNode *node, const QualType &ty) { // NOLINT(*-no-recursion)
291 // Pointer type
292
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 15329 if (ty.isPtr()) {
293
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 2617 llvm::DIType *pointeeTy = getDITypeForQualType(node, ty.getContained());
294
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 5234 return diBuilder->createPointerType(pointeeTy, pointerWidth);
295 }
296
297 // Reference type
298
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 12712 if (ty.isRef()) {
299
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 1710 llvm::DIType *referencedType = getDITypeForQualType(node, ty.getContained());
300
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 3420 return diBuilder->createReferenceType(llvm::dwarf::DW_TAG_reference_type, referencedType, pointerWidth);
301 }
302
303 // Array type
304
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 11002 if (ty.isArray()) {
305
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 12 llvm::DIType *itemTy = getDITypeForQualType(node, ty.getContained());
306
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 12 const size_t size = ty.getArraySize();
307
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 12 const llvm::DINodeArray subscripts = diBuilder->getOrCreateArray({});
308
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 12 return diBuilder->createArrayType(size, 0, itemTy, subscripts);
309 }
310
311 // Primitive types
312 llvm::DIType *baseDiType;
313
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 10990 switch (ty.getSuperType()) {
314 39 case TY_DOUBLE:
315 39 baseDiType = doubleTy;
316 39 break;
317 1390 case TY_INT:
318
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 1390 baseDiType = ty.isSigned() ? intTy : uIntTy;
319 1390 break;
320 44 case TY_SHORT:
321
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 44 baseDiType = ty.isSigned() ? shortTy : uShortTy;
322 44 break;
323 2137 case TY_LONG:
324
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 2137 baseDiType = ty.isSigned() ? longTy : uLongTy;
325 2137 break;
326 417 case TY_BYTE:
327 417 baseDiType = byteTy;
328 417 break;
329 532 case TY_CHAR:
330 532 baseDiType = charTy;
331 532 break;
332 702 case TY_STRING:
333 702 baseDiType = stringTy;
334 702 break;
335 604 case TY_BOOL:
336 604 baseDiType = boolTy;
337 604 break;
338 5106 case TY_STRUCT: {
339 // Do cache lookup
340 5106 const size_t hashKey = std::hash<QualType>{}(ty);
341
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 5106 const auto it = structTypeCache.find(hashKey);
342
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 5106 if (it != structTypeCache.end())
343 4331 return it->second;
344
345 // Cache miss, generate struct type
346
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 775 const Struct *spiceStruct = ty.getStruct(node);
347
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 775 assert(spiceStruct != nullptr);
348
349 // Retrieve information about the struct
350
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 775 const uint32_t lineNo = spiceStruct->getDeclCodeLoc().line;
351
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 775 llvm::Type *structType = spiceStruct->entry->getQualType().toLLVMType(irGenerator->sourceFile);
352
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 775 assert(structType != nullptr);
353 775 const llvm::DataLayout &dataLayout = irGenerator->module->getDataLayout();
354
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 775 const llvm::StructLayout *structLayout = dataLayout.getStructLayout(llvm::cast<llvm::StructType>(structType));
355
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 775 const uint32_t alignInBits = dataLayout.getABITypeAlign(structType).value();
356
357 // Create struct ty. Generic substantiations are named by their signature (e.g. Vector<int>), so that debuggers can
358 // tell the manifestations of a generic struct apart
359
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 775 const std::string structName = spiceStruct->getSignature();
360
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 775 const std::string mangledName = NameMangling::mangleStruct(*spiceStruct);
361
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 2325 llvm::DICompositeType *structDiType = diBuilder->createStructType(
362
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 1550 diFile, structName, diFile, lineNo, structLayout->getSizeInBits(), alignInBits,
363 775 llvm::DINode::FlagTypePassByReference | llvm::DINode::FlagNonTrivial, nullptr, {}, 0, nullptr, mangledName);
364
365 // Insert into cache
366
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 775 structTypeCache.emplace(hashKey, structDiType);
367
368 // A synthesized vtable pointer takes up the first element of the LLVM struct type, which shifts all fields
369 // by one element
370
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 775 const size_t fieldElementOffset = spiceStruct->hasSynthesizedVTablePtr() ? 1 : 0;
371
372 // Collect DI types for fields
373 775 std::vector<llvm::Metadata *> fieldTypes;
374
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 3048 for (size_t i = 0; i < spiceStruct->scope->getFieldCount(); i++) {
375 // Get field entry
376
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 2273 const SymbolTableEntry *fieldEntry = spiceStruct->scope->lookupField(i);
377
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 2273 assert(fieldEntry != nullptr && fieldEntry->isField());
378
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 2273 if (fieldEntry->isImplicitField)
379 234 continue;
380
381
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 2039 const QualType &fieldType = fieldEntry->getQualType();
382 2039 const uint32_t fieldLineNo = fieldEntry->declNode->codeLoc.line;
383
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 2039 const size_t offsetInBits = structLayout->getElementOffsetInBits(i + fieldElementOffset);
384
385
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 2039 llvm::DIType *fieldDiType = getDITypeForQualType(node, fieldType);
386 llvm::DIDerivedType *fieldDiDerivedType =
387
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 2039 diBuilder->createMemberType(structDiType, fieldEntry->name, diFile, fieldLineNo, fieldDiType->getSizeInBits(),
388 fieldDiType->getAlignInBits(), offsetInBits, llvm::DINode::FlagZero, fieldDiType);
389
390
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 2039 fieldTypes.push_back(fieldDiDerivedType);
391 }
392
393 // Collect DI nodes for the template parameters of generic substantiations
394 775 std::vector<llvm::Metadata *> templateParams;
395
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 775 if (!spiceStruct->templateTypes.empty() && spiceStruct->isFullySubstantiated()) {
396 // The template parameters of a substantiation carry the concrete types, so the declared parameter names
397 // (e.g. 'T') have to be taken from the generic preset
398
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 607 const StructBase *nameSource = spiceStruct->isGenericSubstantiation() ? spiceStruct->genericPreset : spiceStruct;
399
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 607 const QualTypeList concreteTemplateTypes = spiceStruct->getConcreteTemplateTypes();
400
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 607 assert(nameSource->templateTypes.size() == concreteTemplateTypes.size());
401
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 607 templateParams.reserve(concreteTemplateTypes.size());
402
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 1544 for (size_t i = 0; i < concreteTemplateTypes.size(); i++) {
403
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 937 const std::string &paramName = nameSource->templateTypes.at(i).getSubType();
404
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 937 llvm::DIType *paramDiType = getDITypeForQualType(node, concreteTemplateTypes.at(i));
405
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 937 templateParams.push_back(diBuilder->createTemplateTypeParameter(compileUnit, paramName, paramDiType, false));
406 }
407 607 }
408
409 // Attach fields and template parameters. This may re-unique the struct type, so refresh all references to it
410 775 const llvm::DINodeArray templateParamArray =
411
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 775 templateParams.empty() ? llvm::DINodeArray() : diBuilder->getOrCreateArray(templateParams);
412
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 775 diBuilder->replaceArrays(structDiType, diBuilder->getOrCreateArray(fieldTypes), templateParamArray);
413
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 775 structTypeCache.at(hashKey) = structDiType;
414 775 baseDiType = structDiType;
415 775 break;
416 775 }
417 4 case TY_INTERFACE: {
418 // Do cache lookup
419 4 const size_t hashKey = std::hash<QualType>{}(ty);
420
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 4 const auto it = structTypeCache.find(hashKey);
421
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 4 if (it != structTypeCache.end())
422 2 return it->second;
423
424 // Cache miss, generate interface type
425
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 2 const Interface *spiceInterface = ty.getInterface(node);
426
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 2 assert(spiceInterface != nullptr);
427
428 // Retrieve information about the interface
429
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 2 const uint32_t lineNo = spiceInterface->getDeclCodeLoc().line;
430
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 2 llvm::Type *interfaceType = spiceInterface->entry->getQualType().toLLVMType(irGenerator->sourceFile);
431
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 2 assert(interfaceType != nullptr);
432
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 2 const llvm::DataLayout dataLayout = irGenerator->module->getDataLayout();
433
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 2 const llvm::StructLayout *structLayout = dataLayout.getStructLayout(llvm::cast<llvm::StructType>(interfaceType));
434
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 2 const uint32_t alignInBits = dataLayout.getABITypeAlign(interfaceType).value();
435
436 // Create interface ty
437
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 2 const std::string mangledName = NameMangling::mangleInterface(*spiceInterface);
438
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 6 llvm::DICompositeType *interfaceDiType = diBuilder->createStructType(
439
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 4 diFile, spiceInterface->name, diFile, lineNo, structLayout->getSizeInBits(), alignInBits,
440 2 llvm::DINode::FlagTypePassByReference | llvm::DINode::FlagNonTrivial, nullptr, {}, 0, nullptr, mangledName);
441
442 // Set vtable holder to itself for interfaces
443
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 2 interfaceDiType->replaceVTableHolder(interfaceDiType);
444 2 baseDiType = interfaceDiType;
445
446 // Insert into cache
447
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 2 structTypeCache.emplace(hashKey, interfaceDiType);
448
449 2 break;
450 2 }
451 ✗ case TY_UNION: {
452 // Do cache lookup
453 ✗ const size_t hashKey = std::hash<QualType>{}(ty);
454 ✗ const auto it = structTypeCache.find(hashKey);
455 ✗ if (it != structTypeCache.end())
456 ✗ return it->second;
457
458 // Cache miss, generate union type
459 ✗ const Union *spiceUnion = ty.getUnion(node);
460 ✗ assert(spiceUnion != nullptr);
461
462 // Retrieve information about the union
463 ✗ const uint32_t lineNo = spiceUnion->getDeclCodeLoc().line;
464 ✗ llvm::Type *unionType = spiceUnion->entry->getQualType().toLLVMType(irGenerator->sourceFile);
465 ✗ assert(unionType != nullptr);
466 ✗ const auto unionStructType = llvm::cast<llvm::StructType>(unionType);
467 ✗ const llvm::DataLayout &dataLayout = irGenerator->module->getDataLayout();
468 ✗ const llvm::StructLayout *structLayout = dataLayout.getStructLayout(unionStructType);
469 ✗ const uint32_t alignInBits = dataLayout.getABITypeAlign(unionType).value() * 8;
470 // Element 2 is the raw byte-buffer payload that every field aliases at runtime (see Type::toLLVMType's TY_UNION
471 // branch); element 0 is the hidden discriminant tag, which is not surfaced in the debug view.
472 ✗ const uint64_t payloadOffsetInBits = structLayout->getElementOffsetInBits(2);
473
474 ✗ const std::string unionName = spiceUnion->getSignature();
475 ✗ const std::string mangledName = NameMangling::mangleUnion(*spiceUnion);
476 llvm::DICompositeType *unionDiType =
477 ✗ diBuilder->createUnionType(diFile, unionName, diFile, lineNo, structLayout->getSizeInBits(), alignInBits,
478 ✗ llvm::DINode::FlagZero, {}, 0, mangledName);
479
480 // Insert into cache before computing field types, so that a self-referential field (e.g. a pointer to this same
481 // union) can find this (still-empty) type instead of recursing infinitely
482 ✗ structTypeCache.emplace(hashKey, unionDiType);
483
484 // Collect DI types for fields. Every field overlaps the same payload bytes, so they all share the same offset
485 ✗ std::vector<llvm::Metadata *> fieldTypes;
486 ✗ for (size_t i = 0; i < spiceUnion->scope->getFieldCount(); i++) {
487 ✗ const SymbolTableEntry *fieldEntry = spiceUnion->scope->lookupField(i);
488 ✗ assert(fieldEntry != nullptr && fieldEntry->isField());
489
490 ✗ const QualType &fieldType = fieldEntry->getQualType();
491 ✗ const uint32_t fieldLineNo = fieldEntry->declNode->codeLoc.line;
492 ✗ llvm::DIType *fieldDiType = getDITypeForQualType(node, fieldType);
493 ✗ llvm::DIDerivedType *fieldDiDerivedType = diBuilder->createMemberType(
494 ✗ unionDiType, fieldEntry->name, diFile, fieldLineNo, fieldDiType->getSizeInBits(), fieldDiType->getAlignInBits(),
495 payloadOffsetInBits, llvm::DINode::FlagZero, fieldDiType);
496
497 ✗ fieldTypes.push_back(fieldDiDerivedType);
498 }
499
500 // Attach fields. This may re-unique the union type, so refresh all references to it
501 ✗ diBuilder->replaceArrays(unionDiType, diBuilder->getOrCreateArray(fieldTypes));
502 ✗ structTypeCache.at(hashKey) = unionDiType;
503 ✗ baseDiType = unionDiType;
504 ✗ break;
505 ✗ }
506 15 case TY_FUNCTION: // fall-through
507 case TY_PROCEDURE:
508 15 baseDiType = fatPtrTy;
509 15 break;
510 ✗ default:
511 − throw CompilerError(UNHANDLED_BRANCH, "Debug Info Type fallthrough"); // GCOV_EXCL_LINE
512 }
513
514
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 6657 if (ty.isConst())
515 854 baseDiType = diBuilder->createQualifiedType(llvm::dwarf::DW_TAG_const_type, baseDiType);
516
517 6657 return baseDiType;
518 }
519
520 } // namespace spice::compiler
521