GCC Code Coverage Report

Directory: ../
Coverage: low: ≥ 0% medium: ≥ 75.0% high: ≥ 90.0%
Coverage Exec / Excl / Total
Lines: 97.6% 413 / 6 / 429
Functions: 96.1% 49 / 0 / 51
Branches: 62.7% 460 / 20 / 754
src/irgenerator/IRGenerator.cpp
Line Branch Exec Source
1 // Copyright (c) 2021-2026 ChilliBits. All rights reserved.
2
3 #include "IRGenerator.h"
4
5 #include <SourceFile.h>
6 #include <driver/Driver.h>
7 #include <global/GlobalResourceManager.h>
8 #include <model/Function.h>
9 #include <symboltablebuilder/SymbolTableBuilder.h>
10 #include <typechecker/FunctionManager.h>
11
12 #include <llvm/IR/Module.h>
13 #include <llvm/IR/Verifier.h>
14
15 namespace spice::compiler {
16
17 const std::string PRODUCER_STRING = "spice version " + std::string(SPICE_VERSION) + " (https://github.com/spicelang/spice)";
18
19 2175 IRGenerator::IRGenerator(GlobalResourceManager &resourceManager, SourceFile *sourceFile)
20 2175 : CompilerPass(resourceManager, sourceFile), context(cliOptions.useLTO ? resourceManager.ltoContext : sourceFile->context),
21
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 2175 builder(sourceFile->builder), module(sourceFile->llvmModule.get()), conversionManager(sourceFile, this),
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 4350 stdFunctionManager(sourceFile, resourceManager, module) {
23 // Attach information to the module
24
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 2175 module->setTargetTriple(cliOptions.targetTriple);
25
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 2175 module->setDataLayout(sourceFile->targetMachine->createDataLayout());
26
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 2175 if (cliOptions.outputContainer == OutputContainer::SHARED_LIBRARY) {
27
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 1 module->setPICLevel(llvm::PICLevel::SmallPIC);
28
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 1 module->setPIELevel(llvm::PIELevel::Default);
29 } else {
30
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 2174 module->setPICLevel(llvm::PICLevel::BigPIC);
31
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 2174 module->setPIELevel(llvm::PIELevel::Large);
32 }
33
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 2175 module->setUwtable(llvm::UWTableKind::Default);
34
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 2175 module->setFramePointer(llvm::FramePointerKind::All);
35
36 // Add module identifier metadata
37
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 2175 llvm::NamedMDNode *identifierMetadata = module->getOrInsertNamedMetadata("llvm.ident");
38
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 2175 identifierMetadata->addOperand(llvm::MDNode::get(context, llvm::MDString::get(context, PRODUCER_STRING)));
39
40 // Initialize common LLVM types
41
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 2175 llvmTypes.lambdaFatPtrType = llvm::StructType::get(context, {builder.getPtrTy(), builder.getPtrTy(), builder.getInt64Ty()});
42
43 // Initialize debug info generator
44
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 2175 if (cliOptions.instrumentation.generateDebugInfo)
45
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 27 diGenerator.initialize(sourceFile->fileName, sourceFile->fileDir);
46 2175 }
47
48 2175 std::any IRGenerator::visitEntry(const EntryNode *node) {
49 // Generate IR
50
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 2175 visitChildren(node);
51
52 // Generate test main if required
53
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 2175 if (sourceFile->isMainFile && cliOptions.generateTestMain)
54 4 generateTestMain();
55
56 // Execute deferred VTable initializations
57
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 6600 for (DeferredLogic &deferredVTableInit : deferredVTableInitializations)
58
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 2250 deferredVTableInit.execute();
59
60 // Finalize debug info generator
61 2175 diGenerator.finalize();
62
63 // Verify module
64 2175 verifyModule(node->codeLoc);
65
66
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 4350 return nullptr;
67 }
68
69 119120 llvm::AllocaInst *IRGenerator::insertAlloca(llvm::Type *llvmType, const std::string &varName) {
70
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 119120 if (allocaInsertInst != nullptr) { // If there is already an alloca inst, insert right after that
71
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 84458 llvm::AllocaInst *allocaInst = builder.CreateAlloca(llvmType, nullptr, varName);
72 84458 allocaInst->dropLocation(); // Part of prologue
73 84458 allocaInst->moveAfter(allocaInsertInst);
74 84458 allocaInsertInst = allocaInst;
75 } else { // This is the first alloca inst in the current function -> insert at the entry block
76 // Save current basic block and move insert cursor to entry block of the current function
77 34662 llvm::BasicBlock *currentBlock = builder.GetInsertBlock();
78 34662 builder.SetInsertPoint(allocaInsertBlock, allocaInsertBlock->begin());
79
80 // Allocate the size of the given LLVM type
81
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 34662 allocaInsertInst = builder.CreateAlloca(llvmType, nullptr, varName);
82 34662 allocaInsertInst->dropLocation(); // Part of prologue
83
84 // Restore old basic block
85 34662 builder.SetInsertPoint(currentBlock);
86 }
87
88 // Insert lifetime start marker
89
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 119120 if (cliOptions.useLifetimeMarkers)
90 54 builder.CreateLifetimeStart(allocaInsertInst);
91
92 119120 return allocaInsertInst;
93 }
94
95 98178 llvm::AllocaInst *IRGenerator::insertAlloca(const QualType &qualType, const std::string &varName) {
96 98178 llvm::Type *llvmType = qualType.toLLVMType(sourceFile);
97 98178 llvm::AllocaInst *alloca = insertAlloca(llvmType, varName);
98
99 // Insert type metadata
100
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 98178 if (cliOptions.useTBAAMetadata)
101 9 mdGenerator.generateTypeMetadata(allocaInsertInst, qualType);
102
103 98178 return alloca;
104 }
105
106 215844 llvm::LoadInst *IRGenerator::insertLoad(llvm::Type *llvmType, llvm::Value *ptr, bool isVolatile,
107 const std::string &varName) const {
108
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 215844 assert(ptr->getType()->isPointerTy());
109
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 215844 return builder.CreateLoad(llvmType, ptr, isVolatile, varName);
110 }
111
112 184300 llvm::LoadInst *IRGenerator::insertLoad(const QualType &qualType, llvm::Value *ptr, bool isVolatile, const std::string &varName) {
113 184300 llvm::Type *llvmType = qualType.toLLVMType(sourceFile);
114 184300 llvm::LoadInst *load = insertLoad(llvmType, ptr, isVolatile, varName);
115
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 184300 if (cliOptions.useTBAAMetadata)
116 6 mdGenerator.generateTBAAMetadata(load, qualType);
117 184300 return load;
118 }
119
120 118459 llvm::StoreInst *IRGenerator::insertStore(llvm::Value *val, llvm::Value *ptr, bool isVolatile) const {
121
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 118459 assert(ptr->getType()->isPointerTy());
122 118459 return builder.CreateStore(val, ptr, isVolatile);
123 }
124
125 31977 void IRGenerator::insertStore(llvm::Value *val, llvm::Value *ptr, const QualType &qualType, bool isVolatile) {
126 31977 llvm::StoreInst *store = insertStore(val, ptr, isVolatile);
127
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 31977 if (cliOptions.useTBAAMetadata)
128 9 mdGenerator.generateTBAAMetadata(store, qualType);
129 31977 }
130
131 59769 llvm::Value *IRGenerator::insertInBoundsGEP(llvm::Type *type, llvm::Value *basePtr, llvm::ArrayRef<llvm::Value *> indices,
132 const std::string &varName) const {
133
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 59769 assert(basePtr->getType()->isPointerTy());
134
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 59769 assert(!indices.empty());
135
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 172791 assert(std::ranges::all_of(indices, [](const llvm::Value *index) {
136 const llvm::Type *indexType = index->getType();
137 return indexType->isIntegerTy(32) || indexType->isIntegerTy(64);
138 }));
139
140 // Insert GEP
141
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 59769 return builder.CreateInBoundsGEP(type, basePtr, indices, varName);
142 }
143
144 25474 llvm::Value *IRGenerator::insertStructGEP(llvm::Type *type, llvm::Value *basePtr, unsigned int index,
145 const std::string &varName) const {
146
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 25474 assert(basePtr->getType()->isPointerTy());
147
148 // If we use index 0 we can use the base pointer directly
149
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 25474 if (index == 0)
150 8056 return basePtr;
151
152 // Insert GEP
153
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 17418 return builder.CreateStructGEP(type, basePtr, index, varName);
154 }
155
156 120942 llvm::Value *IRGenerator::resolveValue(const ExprNode *node) {
157 // Visit the given AST node
158
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 120942 auto exprResult = any_cast<LLVMExprResult>(visit(node));
159
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 241884 return resolveValue(node, exprResult);
160 }
161
162 133187 llvm::Value *IRGenerator::resolveValue(const ExprNode *node, LLVMExprResult &exprResult) {
163 133187 return resolveValue(node->getEvaluatedSymbolType(manIdx), exprResult);
164 }
165
166 253714 llvm::Value *IRGenerator::resolveValue(const QualType &qualType, LLVMExprResult &exprResult) {
167 // Check if the value is already present
168
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 253714 if (exprResult.value != nullptr)
169 81888 return exprResult.value;
170
171 // Check if a constant is present
172
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 171826 if (exprResult.constant != nullptr) {
173 48979 materializeConstant(exprResult);
174 48979 return exprResult.value;
175 }
176
177
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 122847 assert(exprResult.ptr != nullptr || exprResult.refPtr != nullptr);
178
179 // De-reference if reference type
180
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 122847 const bool isVolatile = exprResult.entry && exprResult.entry->isVolatile;
181
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 122847 if (exprResult.refPtr != nullptr && exprResult.ptr == nullptr)
182
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 1603 exprResult.ptr = insertLoad(builder.getPtrTy(), exprResult.refPtr, isVolatile);
183
184 // Load the value from the pointer
185
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 122847 const QualType referencedType = qualType.removeReferenceWrapper();
186
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 122847 exprResult.value = insertLoad(referencedType, exprResult.ptr, isVolatile);
187
188 122847 return exprResult.value;
189 }
190
191 13099 llvm::Value *IRGenerator::resolveAddress(const ASTNode *node) {
192 // Visit the given AST node
193
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 13099 auto exprResult = any_cast<LLVMExprResult>(visit(node));
194
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 26198 return resolveAddress(exprResult);
195 }
196
197 96190 llvm::Value *IRGenerator::resolveAddress(LLVMExprResult &exprResult) {
198 // Check if an address is already present
199
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 96190 if (exprResult.ptr != nullptr)
200 79149 return exprResult.ptr;
201
202 // Check if the reference address is already present
203
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 17041 const bool isVolatile = exprResult.entry && exprResult.entry->isVolatile;
204
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 17041 if (exprResult.refPtr != nullptr && exprResult.ptr == nullptr) {
205
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 13605 exprResult.ptr = insertLoad(builder.getPtrTy(), exprResult.refPtr, isVolatile);
206 13605 return exprResult.ptr;
207 }
208
209 // If not, store the value or constant
210 3436 materializeConstant(exprResult);
211
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 3436 assert(exprResult.value != nullptr);
212
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 6866 exprResult.ptr = insertAlloca(exprResult.value->getType(), exprResult.entry ? exprResult.entry->name : "");
213 3436 insertStore(exprResult.value, exprResult.ptr, isVolatile);
214
215 3436 return exprResult.ptr;
216 }
217
218 7597 llvm::Constant *IRGenerator::getDefaultValueForSymbolType(const QualType &symbolType) { // NOLINT(misc-no-recursion)
219 // Double
220
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 7597 if (symbolType.is(TY_DOUBLE))
221
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 18 return llvm::ConstantFP::get(context, llvm::APFloat(0.0));
222
223 // Int
224
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 7579 if (symbolType.is(TY_INT))
225 741 return builder.getInt32(0);
226
227 // Short
228
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 6838 if (symbolType.is(TY_SHORT))
229 9 return builder.getInt16(0);
230
231 // Long
232
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 6829 if (symbolType.is(TY_LONG))
233 2666 return builder.getInt64(0);
234
235 // Byte or char
236
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 4163 if (symbolType.isOneOf({TY_BYTE, TY_CHAR}))
237 90 return builder.getInt8(0);
238
239 // String
240
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 4073 if (symbolType.is(TY_STRING)) {
241
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 749 llvm::GlobalVariable *globalString = builder.CreateGlobalString("", "");
242
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 749 if (cliOptions.comparableOutput)
243
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 749 globalString->setAlignment(llvm::Align(4));
244 749 return globalString;
245 }
246
247 // Bool
248
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 3324 if (symbolType.is(TY_BOOL))
249 88 return builder.getFalse();
250
251 // Pointer or reference
252
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 3236 if (symbolType.isOneOf({TY_PTR, TY_REF}))
253 3072 return llvm::Constant::getNullValue(builder.getPtrTy());
254
255 // Array
256
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 164 if (symbolType.isArray()) {
257 // Get array size
258
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 52 const size_t arraySize = symbolType.getArraySize();
259
260 // Get default value for item
261
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 52 llvm::Constant *defaultItemValue = getDefaultValueForSymbolType(symbolType.getContained());
262
263 // Retrieve array and item type
264
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 52 llvm::Type *itemType = symbolType.getContained().toLLVMType(sourceFile);
265
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 52 llvm::ArrayType *arrayType = llvm::ArrayType::get(itemType, arraySize);
266
267 // Create a constant array with n times the default value
268
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 104 const std::vector itemConstants(arraySize, defaultItemValue);
269
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 52 return llvm::ConstantArray::get(arrayType, itemConstants);
270 52 }
271
272 // Function or procedure
273
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 112 if (symbolType.isOneOf({TY_FUNCTION, TY_PROCEDURE})) {
274
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 58 llvm::Constant *ptrDefaultValue = getDefaultValueForSymbolType(QualType(TY_PTR));
275 58 llvm::Constant *sizeDefaultValue = builder.getInt64(0);
276
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 58 return llvm::ConstantStruct::get(llvmTypes.lambdaFatPtrType, {ptrDefaultValue, ptrDefaultValue, sizeDefaultValue});
277 }
278
279 // Struct
280
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 54 if (symbolType.is(TY_STRUCT)) {
281 // Retrieve field count
282
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 53 Scope *structScope = symbolType.getBodyScope();
283
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 53 assert(structScope != nullptr);
284
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 53 const size_t fieldCount = structScope->getFieldCount();
285
286 // Get default values for all fields of the struct
287 53 std::vector<llvm::Constant *> fieldConstants;
288
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 53 fieldConstants.reserve(fieldCount);
289
290 // Add default value for each struct field
291
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 161 for (size_t i = 0; i < fieldCount; i++) {
292 // Get entry of the field
293
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 108 const SymbolTableEntry *fieldEntry = structScope->lookupField(i);
294
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 108 assert(fieldEntry != nullptr && fieldEntry->isField());
295
296 // Retrieve default field value
297 llvm::Constant *defaultFieldValue;
298
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 108 if (const auto fieldNode = dynamic_cast<FieldNode *>(fieldEntry->declNode); fieldNode && fieldNode->defaultValue)
299
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 2 defaultFieldValue = getConst(fieldNode->defaultValue->getCompileTimeValue(manIdx), fieldEntry->getQualType(), fieldNode);
300 else
301
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 106 defaultFieldValue = getDefaultValueForSymbolType(fieldEntry->getQualType());
302
303
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 108 fieldConstants.push_back(defaultFieldValue);
304 }
305
306
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 53 const auto structType = llvm::cast<llvm::StructType>(symbolType.toLLVMType(sourceFile));
307
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 53 return llvm::ConstantStruct::get(structType, fieldConstants);
308 53 }
309
310 // Interface
311
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 1 if (symbolType.is(TY_INTERFACE)) {
312 1 const auto structType = llvm::cast<llvm::StructType>(symbolType.toLLVMType(sourceFile));
313 1 return llvm::ConstantStruct::get(structType, llvm::Constant::getNullValue(builder.getPtrTy()));
314 }
315
316 − throw CompilerError(INTERNAL_ERROR, "Cannot determine default value for symbol type"); // GCOV_EXCL_LINE
317 }
318
319 46389 llvm::Constant *IRGenerator::getConst(const CompileTimeValue &compileTimeValue, const QualType &type, const ASTNode *node) const {
320
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 46389 if (type.is(TY_DOUBLE))
321
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 1765 return llvm::ConstantFP::get(context, llvm::APFloat(compileTimeValue.doubleValue));
322
323
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 44624 if (type.is(TY_INT))
324 7901 return builder.getInt32(compileTimeValue.intValue);
325
326
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 36723 if (type.is(TY_SHORT))
327 1219 return builder.getInt16(compileTimeValue.shortValue);
328
329
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 35504 if (type.is(TY_LONG))
330 16897 return builder.getInt64(compileTimeValue.longValue);
331
332
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 18607 if (type.isOneOf({TY_BYTE, TY_CHAR}))
333 4740 return builder.getInt8(compileTimeValue.charValue);
334
335
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 13867 if (type.is(TY_STRING)) {
336 8919 const std::string &stringValue = resourceManager.compileTimeStringValues.at(compileTimeValue.stringValueOffset);
337
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 26757 return createGlobalStringConst(ANON_GLOBAL_STRING_NAME, stringValue, node->codeLoc);
338 }
339
340
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 4948 if (type.is(TY_BOOL))
341 4948 return builder.getInt1(compileTimeValue.boolValue);
342
343 ✗ if (type.is(TY_PTR))
344 ✗ return llvm::Constant::getNullValue(builder.getPtrTy());
345
346 − throw CompilerError(UNHANDLED_BRANCH, "Constant fall-through"); // GCOV_EXCL_LINE
347 }
348
349 97601 llvm::BasicBlock *IRGenerator::createBlock(const std::string &blockName /*=""*/) const {
350
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 97601 return llvm::BasicBlock::Create(context, blockName);
351 }
352
353 97601 void IRGenerator::switchToBlock(llvm::BasicBlock *block, llvm::Function *parentFct /*=nullptr*/) {
354
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 97601 assert(block->getParent() == nullptr); // Ensure that the block was not added to a function already
355 // If no parent function were passed, use the current function
356
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 97601 if (!parentFct)
357 62766 parentFct = builder.GetInsertBlock()->getParent();
358 // Append block to current function
359 97601 parentFct->insert(parentFct->end(), block);
360 // Set insert point to the block
361 97601 builder.SetInsertPoint(block);
362 97601 blockAlreadyTerminated = false;
363 97601 }
364
365 29496 void IRGenerator::terminateBlock(const StmtLstNode *stmtLstNode) {
366 29496 generateScopeCleanup(stmtLstNode);
367 29496 blockAlreadyTerminated = true;
368 29496 }
369
370 32309 void IRGenerator::insertJump(llvm::BasicBlock *targetBlock) {
371
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 32309 if (blockAlreadyTerminated)
372 9067 return;
373 23242 builder.CreateBr(targetBlock);
374 23242 blockAlreadyTerminated = true;
375 }
376
377 26599 void IRGenerator::insertCondJump(llvm::Value *condition, llvm::BasicBlock *trueBlock, llvm::BasicBlock *falseBlock,
378 Likelihood likelihood /*=UNSPECIFIED*/) {
379
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 26599 if (blockAlreadyTerminated)
380 ✗ return;
381 26599 llvm::BranchInst *jumpInst = builder.CreateCondBr(condition, trueBlock, falseBlock);
382 26599 blockAlreadyTerminated = true;
383
384
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 26599 if (likelihood != Likelihood::UNSPECIFIED)
385 4741 mdGenerator.generateBranchWeightsMetadata(jumpInst, likelihood);
386 }
387
388 34822 void IRGenerator::verifyFunction(const llvm::Function *fct, const CodeLoc &codeLoc) const {
389 // Skip the verifying step if the verifier was disabled manually or debug info is emitted
390
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 34822 if (cliOptions.disableVerifier)
391 ✗ return;
392
393 // Verify function
394 34822 std::string output;
395
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 34822 llvm::raw_string_ostream oss(output);
396 − if (llvm::verifyFunction(*fct, &oss)) // LCOV_EXCL_LINE
397 − throw CompilerError(codeLoc, INVALID_FUNCTION, output); // LCOV_EXCL_LINE
398 34822 }
399
400 2175 void IRGenerator::verifyModule(const CodeLoc &codeLoc) const {
401 // Skip the verifying step if the verifier was disabled manually or debug info is emitted
402
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 2175 if (cliOptions.disableVerifier)
403 ✗ return;
404
405 // Verify module
406 2175 std::string output;
407
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 2175 llvm::raw_string_ostream oss(output);
408 − if (llvm::verifyModule(*module, &oss)) // LCOV_EXCL_LINE
409 − throw CompilerError(codeLoc, INVALID_MODULE, output); // LCOV_EXCL_LINE
410 2175 }
411
412 17199 LLVMExprResult IRGenerator::doAssignment(const ASTNode *lhsNode, const ExprNode *rhsNode, const ASTNode *node) {
413 // Get entry of left side
414
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 17199 auto exprResult = std::any_cast<LLVMExprResult>(visit(lhsNode));
415 17199 const SymbolTableEntry *entry = exprResult.entry;
416
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 17199 llvm::Value *lhsAddress = entry != nullptr && entry->getQualType().isRef() ? exprResult.refPtr : resolveAddress(exprResult);
417
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 34398 return doAssignment(lhsAddress, entry, rhsNode, node);
418 }
419
420 39789 LLVMExprResult IRGenerator::doAssignment(llvm::Value *lhsAddress, const SymbolTableEntry *lhsEntry, const ExprNode *rhsNode,
421 const ASTNode *node, bool isDecl) {
422 // Get symbol type of right side
423
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 39789 const QualType &rhsSType = rhsNode->getEvaluatedSymbolType(manIdx);
424
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 39789 auto rhs = std::any_cast<LLVMExprResult>(visit(rhsNode));
425
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 79578 return doAssignment(lhsAddress, lhsEntry, rhs, rhsSType, node, isDecl);
426 }
427
428 40492 LLVMExprResult IRGenerator::doAssignment(llvm::Value *lhsAddress, const SymbolTableEntry *lhsEntry, LLVMExprResult &rhs,
429 const QualType &rhsSType, const ASTNode *node, bool isDecl) {
430 // Deduce some information about the assignment
431
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 40492 const bool isRefAssign = lhsEntry != nullptr && lhsEntry->getQualType().isRef();
432 // A non-temporary struct value assigned by value needs a deep copy. This holds whether the destination is a direct
433 // lvalue or the value behind an already-bound reference (assign-through): the binding cases of a reference assignment
434 // (declaration/initial field ref/return value) all return early above before this is consumed, so the remaining
435 // reference assignments are assign-throughs that must copy into the referent instead of shallow-copying (which would
436 // alias the rhs' owned members and double-free).
437
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 40492 const bool needsCopy = rhsSType.removeReferenceWrapper().is(TY_STRUCT) && !rhs.isTemporary();
438
439
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 40492 if (isRefAssign) {
440
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 2963 assert(lhsEntry != nullptr);
441
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 2963 if (isDecl) { // Reference gets initially assigned
442 // Store lhs pointer to rhs
443
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 1651 llvm::Value *refAddress = insertAlloca(builder.getPtrTy());
444 1651 updateAddress(lhsEntry, refAddress);
445
446 // Generate debug info for variable declaration
447 1651 diGenerator.generateLocalVarDebugInfo(lhsEntry->name, refAddress);
448
449 // Get address of right side
450 1651 llvm::Value *rhsAddress = resolveAddress(rhs);
451
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 1651 assert(rhsAddress != nullptr);
452 1651 insertStore(rhsAddress, refAddress);
453
454 1651 return LLVMExprResult{.value = rhsAddress, .ptr = refAddress, .entry = lhsEntry};
455 }
456
457 // Reference to reference assignment (only for struct fields that are not initialized yet)
458 // These are only allowed inside a ctor body. In other cases, the value of the reference gets assigned, not the ref itself.
459
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 1312 const bool isInitialFieldRefAssign = isInCtorBody && rhsSType.isRef() && rhs.entry && lhsEntry->isField();
460 // Assigning the result variable
461 1312 const bool isReturnValAssign = lhsEntry->name == RETURN_VARIABLE_NAME;
462
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 1312 if (isInitialFieldRefAssign || isReturnValAssign) {
463 // Get address of right side
464 1018 llvm::Value *referencedAddress = resolveAddress(rhs);
465
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 1018 assert(referencedAddress != nullptr);
466
467 // Store the rhs* to the lhs**
468 1018 insertStore(referencedAddress, lhsAddress);
469
470 1018 return LLVMExprResult{.value = referencedAddress, .ptr = lhsAddress, .entry = lhsEntry};
471 }
472
473 // Load referenced address
474
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 294 lhsAddress = insertLoad(builder.getPtrTy(), lhsAddress);
475 }
476
477
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 37823 if (isDecl && rhsSType.is(TY_STRUCT) && rhs.isTemporary()) {
478
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 3414 assert(lhsEntry != nullptr);
479 // Directly set the address to the lhs entry (temp stealing)
480 3414 llvm::Value *rhsAddress = resolveAddress(rhs);
481 3414 updateAddress(lhsEntry, rhsAddress);
482 3414 rhs.entry = lhsEntry;
483 // Generate debug info for variable declaration
484 3414 diGenerator.generateLocalVarDebugInfo(lhsEntry->name, rhsAddress);
485 3414 return rhs;
486 }
487
488 // Allocate new memory if the lhs address does not exist
489
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 34409 if (!lhsAddress) {
490
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 18008 assert(lhsEntry != nullptr);
491
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 18008 lhsAddress = insertAlloca(lhsEntry->getQualType());
492 18008 updateAddress(lhsEntry, lhsAddress);
493 // Generate debug info for variable declaration
494 18008 diGenerator.generateLocalVarDebugInfo(lhsEntry->name, lhsAddress);
495 }
496
497 // Check if we try to assign an array by value to a pointer. Here we have to store the address of the first element to the lhs
498
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 34409 if (lhsEntry && lhsEntry->getQualType().isPtr() && rhsSType.isArray() && rhsSType.getArraySize() != ARRAY_SIZE_UNKNOWN) {
499 // Get address of right side
500
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 2 llvm::Value *rhsAddress = resolveAddress(rhs);
501
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 2 assert(rhsAddress != nullptr);
502
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 2 llvm::Type *elementTy = rhsSType.toLLVMType(sourceFile);
503
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 2 llvm::Value *indices[2] = {builder.getInt64(0), builder.getInt32(0)};
504
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 2 llvm::Value *firstItemAddress = insertInBoundsGEP(elementTy, rhsAddress, indices);
505
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 2 insertStore(firstItemAddress, lhsAddress);
506 2 return LLVMExprResult{.value = rhsAddress, .ptr = lhsAddress, .entry = lhsEntry};
507 }
508
509 // Handle operator overloads
510
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 34407 if (!isDecl && conversionManager.callsOverloadedOpFct(node, DEFAULT_OP_IDX)) {
511 419 ResolverFct lhsV = [&] { return static_cast<llvm::Value *>(nullptr); };
512
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 419 ResolverFct rhsV = [&] { return resolveValue(rhsSType, rhs); };
513 838 ResolverFct lhsP = [&] { return lhsAddress; };
514 838 ResolverFct rhsP = [&] { return resolveAddress(rhs); };
515 419 return conversionManager.callOperatorOverloadFct<2>(node, {lhsV, lhsP, rhsV, rhsP}, DEFAULT_OP_IDX);
516 419 }
517
518 // Check if we need to copy the rhs to the lhs. This happens for structs
519
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 33988 if (needsCopy) {
520 // Get address of right side
521
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 462 llvm::Value *rhsAddress = resolveAddress(rhs);
522
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 462 assert(rhsAddress != nullptr);
523
524 // If the lhs already holds an initialized, non-trivially-destructible struct, its old value must be
525 // destructed before the copy overwrites it, otherwise its owning members (heap pointers, strings, ...)
526 // would leak. The typechecker only sets a dtor in exactly those cases. To stay correct for a self-
527 // assignment like 'a = a', the destruct + copy are skipped entirely when both sides share the address
528 // (the assignment is a no-op in that case, and destructing first would corrupt the value to copy from).
529
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 462 const auto *assignNode = dynamic_cast<const AssignExprNode *>(node);
530
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 462 const Function *lhsDtor = assignNode ? assignNode->lhsDtorFct.at(manIdx) : nullptr;
531 462 llvm::BasicBlock *bCopyEnd = nullptr;
532
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 462 if (lhsDtor != nullptr) {
533
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 22 llvm::BasicBlock *bCopy = createBlock("assign.copy");
534
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 11 bCopyEnd = createBlock("assign.copy.end");
535
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 11 insertCondJump(builder.CreateICmpEQ(lhsAddress, rhsAddress), bCopyEnd, bCopy);
536
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 11 switchToBlock(bCopy);
537
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 11 generateCtorOrDtorCall(lhsAddress, lhsDtor, {});
538 }
539
540
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 462 const QualType rhsSTypeNonRef = rhsSType.removeReferenceWrapper().toNonConst();
541
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 462 if (rhsSTypeNonRef.isTriviallyCopyable(node)) {
542 // Create shallow copy
543
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 320 llvm::Type *rhsType = rhsSTypeNonRef.toLLVMType(sourceFile);
544
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 320 const std::string copyName = lhsEntry ? lhsEntry->name : "";
545
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 320 generateShallowCopy(rhsAddress, rhsType, lhsAddress, lhsEntry && lhsEntry->isVolatile);
546 320 } else {
547 // Check if we have a copy ctor
548
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 142 Scope *structScope = rhsSTypeNonRef.getBodyScope();
549
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 426 const ArgList args = {{rhsSTypeNonRef.toConstRef(node), rhs.isTemporary()}};
550
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 142 const Function *copyCtor = FunctionManager::lookup(structScope, CTOR_FUNCTION_NAME, rhsSTypeNonRef, args, true);
551
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 142 if (copyCtor != nullptr) {
552 // Call copy ctor
553
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 284 generateCtorOrDtorCall(lhsAddress, copyCtor, {rhsAddress});
554 } else {
555 ✗ const std::string structName = rhsSTypeNonRef.getName();
556 ✗ const std::string msg = "Cannot copy struct '" + structName + "', as it is not trivially copyable and has no copy ctor";
557 ✗ throw SemanticError(node, COPY_CTOR_REQUIRED, msg);
558 ✗ }
559 142 }
560
561 // Close the self-assignment guard
562
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 462 if (bCopyEnd != nullptr) {
563
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 11 insertJump(bCopyEnd);
564
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 11 switchToBlock(bCopyEnd);
565 }
566 462 return LLVMExprResult{.ptr = lhsAddress, .entry = lhsEntry};
567 }
568
569 // Optimization: If we have the address of both sides, we can do a memcpy instead of loading and storing the value
570 33526 llvm::Value *rhsValue = nullptr;
571
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 33526 if (rhsSType.is(TY_STRUCT) && rhs.value == nullptr && rhs.constant == nullptr) {
572 // Create shallow copy
573
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 1911 const QualType rhsSTypeNonRef = rhsSType.removeReferenceWrapper().toNonConst();
574
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 1911 llvm::Type *rhsType = rhsSTypeNonRef.toLLVMType(sourceFile);
575
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 1911 llvm::Value *rhsAddress = resolveAddress(rhs);
576
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 1911 assert(rhsAddress != nullptr);
577
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 1919 const std::string copyName = lhsEntry ? lhsEntry->name : "";
578
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 1911 generateShallowCopy(rhsAddress, rhsType, lhsAddress, lhsEntry && lhsEntry->isVolatile);
579 1911 } else {
580 // We can load the value from the right side and store it to the left side
581 // Retrieve value of the right side
582 31615 rhsValue = resolveValue(rhsSType, rhs);
583 // Store the value to the address
584 31615 insertStore(rhsValue, lhsAddress, rhsSType);
585 }
586
587 33526 return LLVMExprResult{.value = rhsValue, .ptr = lhsAddress, .entry = lhsEntry};
588
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 419 }
589
590 2616 void IRGenerator::generateShallowCopy(llvm::Value *oldAddress, llvm::Type *varType, llvm::Value *targetAddress,
591 bool isVolatile) const {
592 // Retrieve size to copy
593
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 2616 const llvm::TypeSize typeSize = module->getDataLayout().getTypeAllocSize(varType);
594
595 // Create values for memcpy intrinsic
596
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 2616 llvm::Value *structSize = builder.getInt64(typeSize);
597
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 2616 llvm::Value *copyVolatile = builder.getInt1(isVolatile);
598
599 // Call memcpy intrinsic to execute the shallow copy
600
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 2616 llvm::Function *memcpyFct = stdFunctionManager.getMemcpyIntrinsic();
601
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 2616 assert(targetAddress != nullptr);
602
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 2616 builder.CreateCall(memcpyFct, {targetAddress, oldAddress, structSize, copyVolatile});
603 2616 }
604
605 84842 void IRGenerator::autoDeReferencePtr(llvm::Value *&ptr, QualType &symbolType) {
606
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 146295 while (symbolType.isPtr() || symbolType.isRef()) {
607
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 61453 ptr = insertLoad(symbolType, ptr);
608
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 61453 symbolType = symbolType.getContained();
609 }
610 84842 }
611
612 298 llvm::GlobalVariable *IRGenerator::createGlobalConst(const std::string &baseName, llvm::Constant *constant) const {
613 // Get unused name
614
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 298 const std::string globalName = getUnusedGlobalName(baseName);
615 // Create global
616
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 298 module->getOrInsertGlobal(globalName, constant->getType());
617
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 298 llvm::GlobalVariable *global = module->getNamedGlobal(globalName);
618 // Set initializer to the given constant
619
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 298 global->setInitializer(constant);
620 298 global->setConstant(true);
621
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 298 global->setLinkage(llvm::GlobalValue::PrivateLinkage);
622 298 global->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global);
623 298 return global;
624 298 }
625
626 10183 llvm::GlobalVariable *IRGenerator::createGlobalStringConst(const std::string &baseName, const std::string &value) const {
627 // Get unused name
628
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 10183 const std::string globalName = getUnusedGlobalName(baseName);
629 // Create global
630
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 10183 builder.CreateGlobalString(value, globalName, 0, module);
631
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 10183 llvm::GlobalVariable *global = module->getNamedGlobal(globalName);
632 // If the output should be comparable, fix alignment to 4 bytes
633
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 10183 if (cliOptions.comparableOutput)
634
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 10183 global->setAlignment(llvm::Align(4));
635 10183 return global;
636 10183 }
637
638 10183 llvm::GlobalVariable *IRGenerator::createGlobalStringConst(const std::string &baseName, const std::string &value,
639 const CodeLoc &codeLoc) const {
640 10183 llvm::GlobalVariable *global = createGlobalStringConst(baseName, value);
641 // Create debug info
642
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 10183 if (cliOptions.instrumentation.generateDebugInfo)
643
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 52 diGenerator.generateGlobalStringDebugInfo(global, global->getName().str(), value.length(), codeLoc);
644 10183 return global;
645 }
646
647 17428 std::string IRGenerator::getUnusedGlobalName(const std::string &baseName) const {
648 // Find an unused global name
649 17428 std::string globalName;
650 17428 unsigned int suffixNumber = 0;
651 do {
652
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 675053 globalName = baseName + std::to_string(suffixNumber);
653 675053 suffixNumber++;
654
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 675053 } while (module->getNamedGlobal(globalName) != nullptr);
655 17428 return globalName;
656 ✗ }
657
658 52415 void IRGenerator::materializeConstant(LLVMExprResult &exprResult) {
659 // Skip results, that do not contain a constant or already have a value
660
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 52415 if (exprResult.value != nullptr || exprResult.constant == nullptr)
661 2327 return;
662
663 // Default case: the value to the constant
664 50088 exprResult.value = exprResult.constant;
665 }
666
667 42424 bool IRGenerator::isSymbolDSOLocal(bool isPublic) const {
668 // If we are compiling a shared library and export the global symbol, we need to drop dso_local
669 // because it may be interposed by other shared objects by the dynamic linker.
670
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 42424 return !(isPublic && cliOptions.outputContainer == OutputContainer::SHARED_LIBRARY);
671 }
672
673 14631 llvm::GlobalValue::LinkageTypes IRGenerator::getSymbolLinkageType(bool isPublic) const {
674
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 14631 return isPublic ? llvm::GlobalValue::ExternalLinkage : llvm::GlobalValue::PrivateLinkage;
675 }
676
677 6750 llvm::GlobalValue::LinkageTypes IRGenerator::getVTableLinkageType(bool isPublic) const {
678 // VTables, type infos and type info names are ODR entities that may legitimately be emitted in more than one
679 // translation unit (e.g. an interface that is defined in one file and used from several importing files). Giving
680 // them weak ODR linkage lets the linker coalesce the duplicates. On ELF this pairs with the comdat group below; on
681 // MachO, which has no comdat support, the weak/coalesced linkage is what prevents a duplicate-symbol error.
682
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 6750 return isPublic ? llvm::GlobalValue::WeakODRLinkage : llvm::GlobalValue::PrivateLinkage;
683 }
684
685 6750 void IRGenerator::attachComdatToSymbol(llvm::GlobalVariable *global, const std::string &comdatName, bool isPublic) const {
686 // MachO does not support comdat annotations
687
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 6750 if (isPublic && cliOptions.targetTriple.getObjectFormat() != llvm::Triple::MachO)
688
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 6654 global->setComdat(module->getOrInsertComdat(comdatName));
689 6750 }
690
691 208974 llvm::Value *IRGenerator::getAddress(const SymbolTableEntry *entry) {
692
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 208974 const auto it = addressMap.find(entry);
693
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 208974 if (it == addressMap.end() || it->second.empty())
694 50 return nullptr;
695 208924 return it->second.top();
696 }
697
698 166869 void IRGenerator::updateAddress(const SymbolTableEntry *entry, llvm::Value *address) {
699
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 166869 assert(address != nullptr);
700
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 166869 assert(address->getType()->isPointerTy());
701 166869 auto &stack = addressMap[entry];
702
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 166869 if (stack.empty())
703 135530 stack.push(address);
704 else
705 31339 stack.top() = address;
706 166869 }
707
708 54 void IRGenerator::pushAddress(const SymbolTableEntry *entry, llvm::Value *address) {
709
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 54 assert(address != nullptr);
710 54 addressMap[entry].push(address);
711 54 }
712
713 54 void IRGenerator::popAddress(const SymbolTableEntry *entry) {
714
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 54 auto it = addressMap.find(entry);
715
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 54 assert(it != addressMap.end() && !it->second.empty());
716 54 it->second.pop();
717 54 }
718
719 7328 llvm::Function *IRGenerator::getLLVMFunction(const Function *spiceFunc) {
720
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 7328 const auto it = llvmFunctions.find(spiceFunc);
721
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 14656 return it != llvmFunctions.end() ? it->second : nullptr;
722 }
723
724 33326 void IRGenerator::setLLVMFunction(const Function *spiceFunc, llvm::Function *llvmFunction) {
725
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 33326 assert(llvmFunction != nullptr);
726 33326 llvmFunctions[spiceFunc] = llvmFunction;
727 33326 }
728
729 4182 std::string IRGenerator::getIRString(llvm::Module *llvmModule, const CliOptions &cliOptions) {
730
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 4182 assert(llvmModule != nullptr); // Make sure the module hasn't been moved away
731
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 4182 const bool eliminateTarget = cliOptions.comparableOutput && cliOptions.isNativeTarget;
732
733 // Backup target triple and data layout
734
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 4182 const llvm::Triple targetTriple = llvmModule->getTargetTriple();
735
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 4182 const std::string targetDataLayout = llvmModule->getDataLayoutStr();
736 // Remove target triple and data layout
737
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 4182 if (eliminateTarget) {
738 4084 llvmModule->setTargetTriple(llvm::Triple());
739
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 4084 llvmModule->setDataLayout("");
740 }
741
742 // Get IR string
743 4182 std::string output;
744
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 4182 llvm::raw_string_ostream oss(output);
745
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 4182 llvmModule->print(oss, nullptr);
746
747 // Restore target triple and data layout
748
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 4182 if (eliminateTarget) {
749
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 4084 llvmModule->setTargetTriple(targetTriple);
750
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 4084 llvmModule->setDataLayout(targetDataLayout);
751 }
752
753 4182 return output;
754 4182 }
755
756 /**
757 * Returns the operator function list for the current manifestation and the given node
758 *
759 * @param node Node to retrieve the op fct pointer list from
760 * @return Op fct pointer list
761 */
762 63525 const std::vector<const Function *> &IRGenerator::getOpFctPointers(const ASTNode *node) const {
763
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 63525 assert(node->getOpFctPointers()->size() > manIdx);
764 63525 return node->getOpFctPointers()->at(manIdx);
765 }
766
767 } // namespace spice::compiler
768