GCC Code Coverage Report

Directory: ../
Coverage: low: ≥ 0% medium: ≥ 75.0% high: ≥ 90.0%
Coverage Exec / Excl / Total
Lines: 97.4% 380 / 6 / 396
Functions: 95.5% 42 / 0 / 44
Branches: 62.4% 443 / 20 / 730
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 <symboltablebuilder/SymbolTableBuilder.h>
9 #include <typechecker/FunctionManager.h>
10
11 #include <llvm/IR/Module.h>
12 #include <llvm/IR/Verifier.h>
13
14 namespace spice::compiler {
15
16 2045 IRGenerator::IRGenerator(GlobalResourceManager &resourceManager, SourceFile *sourceFile)
17 2045 : CompilerPass(resourceManager, sourceFile), context(cliOptions.useLTO ? resourceManager.ltoContext : sourceFile->context),
18
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 2045 builder(sourceFile->builder), module(sourceFile->llvmModule.get()), conversionManager(sourceFile, this),
19
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 4090 stdFunctionManager(sourceFile, resourceManager, module) {
20 // Attach information to the module
21
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 2045 module->setTargetTriple(cliOptions.targetTriple);
22
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 2045 module->setDataLayout(sourceFile->targetMachine->createDataLayout());
23
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 2045 if (cliOptions.outputContainer == OutputContainer::SHARED_LIBRARY) {
24
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 1 module->setPICLevel(llvm::PICLevel::SmallPIC);
25
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 1 module->setPIELevel(llvm::PIELevel::Default);
26 } else {
27
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 2044 module->setPICLevel(llvm::PICLevel::BigPIC);
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 2044 module->setPIELevel(llvm::PIELevel::Large);
29 }
30
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 2045 module->setUwtable(llvm::UWTableKind::Default);
31
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 2045 module->setFramePointer(llvm::FramePointerKind::All);
32
33 // Add module identifier metadata
34
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 2045 llvm::NamedMDNode *identifierMetadata = module->getOrInsertNamedMetadata("llvm.ident");
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 2045 identifierMetadata->addOperand(llvm::MDNode::get(context, llvm::MDString::get(context, PRODUCER_STRING)));
36
37 // Initialize common LLVM types
38
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 2045 llvmTypes.lambdaFatPtrType = llvm::StructType::get(context, {builder.getPtrTy(), builder.getPtrTy(), builder.getInt64Ty()});
39
40 // Initialize debug info generator
41
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 2045 if (cliOptions.instrumentation.generateDebugInfo)
42
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 27 diGenerator.initialize(sourceFile->fileName, sourceFile->fileDir);
43 2045 }
44
45 2045 std::any IRGenerator::visitEntry(const EntryNode *node) {
46 // Generate IR
47
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 2045 visitChildren(node);
48
49 // Generate test main if required
50
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 2045 if (sourceFile->isMainFile && cliOptions.generateTestMain)
51 4 generateTestMain();
52
53 // Execute deferred VTable initializations
54
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 6233 for (DeferredLogic &deferredVTableInit : deferredVTableInitializations)
55
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 2143 deferredVTableInit.execute();
56
57 // Finalize debug info generator
58 2045 diGenerator.finalize();
59
60 // Verify module
61 2045 verifyModule(node->codeLoc);
62
63
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 4090 return nullptr;
64 }
65
66 109168 llvm::AllocaInst *IRGenerator::insertAlloca(llvm::Type *llvmType, const std::string &varName) {
67
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 109168 if (allocaInsertInst != nullptr) { // If there is already an alloca inst, insert right after that
68
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 77508 llvm::AllocaInst *allocaInst = builder.CreateAlloca(llvmType, nullptr, varName);
69
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 77508 allocaInst->setDebugLoc(llvm::DebugLoc());
70 77508 allocaInst->moveAfter(allocaInsertInst);
71 77508 allocaInsertInst = allocaInst;
72 } else { // This is the first alloca inst in the current function -> insert at the entry block
73 // Save current basic block and move insert cursor to entry block of the current function
74 31660 llvm::BasicBlock *currentBlock = builder.GetInsertBlock();
75 31660 builder.SetInsertPoint(allocaInsertBlock, allocaInsertBlock->begin());
76
77 // Allocate the size of the given LLVM type
78
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 31660 allocaInsertInst = builder.CreateAlloca(llvmType, nullptr, varName);
79
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 31660 allocaInsertInst->setDebugLoc(llvm::DebugLoc());
80
81 // Restore old basic block
82 31660 builder.SetInsertPoint(currentBlock);
83 }
84
85 // Insert lifetime start marker
86
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 109168 if (cliOptions.useLifetimeMarkers)
87 54 builder.CreateLifetimeStart(allocaInsertInst);
88
89 109168 return allocaInsertInst;
90 }
91
92 89811 llvm::AllocaInst *IRGenerator::insertAlloca(const QualType &qualType, const std::string &varName) {
93 89811 llvm::Type *llvmType = qualType.toLLVMType(sourceFile);
94 89811 llvm::AllocaInst *alloca = insertAlloca(llvmType, varName);
95
96 // Insert type metadata
97
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 89811 if (cliOptions.useTBAAMetadata)
98 9 mdGenerator.generateTypeMetadata(allocaInsertInst, qualType);
99
100 89811 return alloca;
101 }
102
103 200672 llvm::LoadInst *IRGenerator::insertLoad(llvm::Type *llvmType, llvm::Value *ptr, bool isVolatile,
104 const std::string &varName) const {
105
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 200672 assert(ptr->getType()->isPointerTy());
106
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 200672 return builder.CreateLoad(llvmType, ptr, isVolatile, varName);
107 }
108
109 172681 llvm::LoadInst *IRGenerator::insertLoad(const QualType &qualType, llvm::Value *ptr, bool isVolatile, const std::string &varName) {
110 172681 llvm::Type *llvmType = qualType.toLLVMType(sourceFile);
111 172681 llvm::LoadInst *load = insertLoad(llvmType, ptr, isVolatile, varName);
112
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 172681 if (cliOptions.useTBAAMetadata)
113 6 mdGenerator.generateTBAAMetadata(load, qualType);
114 172681 return load;
115 }
116
117 110005 llvm::StoreInst *IRGenerator::insertStore(llvm::Value *val, llvm::Value *ptr, bool isVolatile) const {
118
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 110005 assert(ptr->getType()->isPointerTy());
119 110005 return builder.CreateStore(val, ptr, isVolatile);
120 }
121
122 30455 void IRGenerator::insertStore(llvm::Value *val, llvm::Value *ptr, const QualType &qualType, bool isVolatile) {
123 30455 llvm::StoreInst *store = insertStore(val, ptr, isVolatile);
124
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 30455 if (cliOptions.useTBAAMetadata)
125 9 mdGenerator.generateTBAAMetadata(store, qualType);
126 30455 }
127
128 55219 llvm::Value *IRGenerator::insertInBoundsGEP(llvm::Type *type, llvm::Value *basePtr, llvm::ArrayRef<llvm::Value *> indices,
129 const std::string &varName) const {
130
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 55219 assert(basePtr->getType()->isPointerTy());
131
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 55219 assert(!indices.empty());
132
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 160419 assert(std::ranges::all_of(indices, [](const llvm::Value *index) {
133 const llvm::Type *indexType = index->getType();
134 return indexType->isIntegerTy(32) || indexType->isIntegerTy(64);
135 }));
136
137 // Insert GEP
138
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 55219 return builder.CreateInBoundsGEP(type, basePtr, indices, varName);
139 }
140
141 23631 llvm::Value *IRGenerator::insertStructGEP(llvm::Type *type, llvm::Value *basePtr, unsigned int index,
142 const std::string &varName) const {
143
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 23631 assert(basePtr->getType()->isPointerTy());
144
145 // If we use index 0 we can use the base pointer directly
146
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 23631 if (index == 0)
147 6918 return basePtr;
148
149 // Insert GEP
150
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 16713 return builder.CreateStructGEP(type, basePtr, index, varName);
151 }
152
153 112514 llvm::Value *IRGenerator::resolveValue(const ExprNode *node) {
154 // Visit the given AST node
155
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 112514 auto exprResult = any_cast<LLVMExprResult>(visit(node));
156
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 225028 return resolveValue(node, exprResult);
157 }
158
159 124179 llvm::Value *IRGenerator::resolveValue(const ExprNode *node, LLVMExprResult &exprResult) {
160 124179 return resolveValue(node->getEvaluatedSymbolType(manIdx), exprResult);
161 }
162
163 237506 llvm::Value *IRGenerator::resolveValue(const QualType &qualType, LLVMExprResult &exprResult) {
164 // Check if the value is already present
165
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 237506 if (exprResult.value != nullptr)
166 76004 return exprResult.value;
167
168 // Check if a constant is present
169
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 161502 if (exprResult.constant != nullptr) {
170 45936 materializeConstant(exprResult);
171 45936 return exprResult.value;
172 }
173
174
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 115566 assert(exprResult.ptr != nullptr || exprResult.refPtr != nullptr);
175
176 // De-reference if reference type
177
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 115566 const bool isVolatile = exprResult.entry && exprResult.entry->isVolatile;
178
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 115566 if (exprResult.refPtr != nullptr && exprResult.ptr == nullptr)
179
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 1553 exprResult.ptr = insertLoad(builder.getPtrTy(), exprResult.refPtr, isVolatile);
180
181 // Load the value from the pointer
182
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 115566 const QualType referencedType = qualType.removeReferenceWrapper();
183
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 115566 exprResult.value = insertLoad(referencedType, exprResult.ptr, isVolatile);
184
185 115566 return exprResult.value;
186 }
187
188 12494 llvm::Value *IRGenerator::resolveAddress(const ASTNode *node) {
189 // Visit the given AST node
190
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 12494 auto exprResult = any_cast<LLVMExprResult>(visit(node));
191
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 24988 return resolveAddress(exprResult);
192 }
193
194 89113 llvm::Value *IRGenerator::resolveAddress(LLVMExprResult &exprResult) {
195 // Check if an address is already present
196
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 89113 if (exprResult.ptr != nullptr)
197 73119 return exprResult.ptr;
198
199 // Check if the reference address is already present
200
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 15994 const bool isVolatile = exprResult.entry && exprResult.entry->isVolatile;
201
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 15994 if (exprResult.refPtr != nullptr && exprResult.ptr == nullptr) {
202
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 12960 exprResult.ptr = insertLoad(builder.getPtrTy(), exprResult.refPtr, isVolatile);
203 12960 return exprResult.ptr;
204 }
205
206 // If not, store the value or constant
207 3034 materializeConstant(exprResult);
208
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 3034 assert(exprResult.value != nullptr);
209
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 6062 exprResult.ptr = insertAlloca(exprResult.value->getType(), exprResult.entry ? exprResult.entry->name : "");
210 3034 insertStore(exprResult.value, exprResult.ptr, isVolatile);
211
212 3034 return exprResult.ptr;
213 }
214
215 7197 llvm::Constant *IRGenerator::getDefaultValueForSymbolType(const QualType &symbolType) { // NOLINT(misc-no-recursion)
216 // Double
217
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 7197 if (symbolType.is(TY_DOUBLE))
218
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 10 return llvm::ConstantFP::get(context, llvm::APFloat(0.0));
219
220 // Int
221
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 7187 if (symbolType.is(TY_INT))
222 695 return builder.getInt32(0);
223
224 // Short
225
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 6492 if (symbolType.is(TY_SHORT))
226 9 return builder.getInt16(0);
227
228 // Long
229
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 6483 if (symbolType.is(TY_LONG))
230 2552 return builder.getInt64(0);
231
232 // Byte or char
233
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 3931 if (symbolType.isOneOf({TY_BYTE, TY_CHAR}))
234 46 return builder.getInt8(0);
235
236 // String
237
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 3885 if (symbolType.is(TY_STRING)) {
238
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 713 llvm::GlobalVariable *globalString = builder.CreateGlobalString("", "");
239
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 713 if (cliOptions.comparableOutput)
240
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 713 globalString->setAlignment(llvm::Align(4));
241 713 return globalString;
242 }
243
244 // Bool
245
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 3172 if (symbolType.is(TY_BOOL))
246 76 return builder.getFalse();
247
248 // Pointer or reference
249
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 3096 if (symbolType.isOneOf({TY_PTR, TY_REF}))
250 2969 return llvm::Constant::getNullValue(builder.getPtrTy());
251
252 // Array
253
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 127 if (symbolType.isArray()) {
254 // Get array size
255
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 21 const size_t arraySize = symbolType.getArraySize();
256
257 // Get default value for item
258
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 21 llvm::Constant *defaultItemValue = getDefaultValueForSymbolType(symbolType.getContained());
259
260 // Retrieve array and item type
261
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 21 llvm::Type *itemType = symbolType.getContained().toLLVMType(sourceFile);
262
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 21 llvm::ArrayType *arrayType = llvm::ArrayType::get(itemType, arraySize);
263
264 // Create a constant array with n times the default value
265
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 42 const std::vector itemConstants(arraySize, defaultItemValue);
266
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 21 return llvm::ConstantArray::get(arrayType, itemConstants);
267 21 }
268
269 // Function or procedure
270
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 106 if (symbolType.isOneOf({TY_FUNCTION, TY_PROCEDURE})) {
271
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 58 llvm::Constant *ptrDefaultValue = getDefaultValueForSymbolType(QualType(TY_PTR));
272 58 llvm::Constant *sizeDefaultValue = builder.getInt64(0);
273
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 58 return llvm::ConstantStruct::get(llvmTypes.lambdaFatPtrType, {ptrDefaultValue, ptrDefaultValue, sizeDefaultValue});
274 }
275
276 // Struct
277
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 48 if (symbolType.is(TY_STRUCT)) {
278 // Retrieve field count
279
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 47 Scope *structScope = symbolType.getBodyScope();
280
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 47 assert(structScope != nullptr);
281
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 47 const size_t fieldCount = structScope->getFieldCount();
282
283 // Get default values for all fields of the struct
284 47 std::vector<llvm::Constant *> fieldConstants;
285
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 47 fieldConstants.reserve(fieldCount);
286
287 // Add default value for each struct field
288
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 152 for (size_t i = 0; i < fieldCount; i++) {
289 // Get entry of the field
290
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 105 const SymbolTableEntry *fieldEntry = structScope->lookupField(i);
291
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 105 assert(fieldEntry != nullptr && fieldEntry->isField());
292
293 // Retrieve default field value
294 llvm::Constant *defaultFieldValue;
295
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 105 if (const auto fieldNode = dynamic_cast<FieldNode *>(fieldEntry->declNode); fieldNode && fieldNode->defaultValue)
296
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 3 defaultFieldValue = getConst(fieldNode->defaultValue->getCompileTimeValue(manIdx), fieldEntry->getQualType(), fieldNode);
297 else
298
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 102 defaultFieldValue = getDefaultValueForSymbolType(fieldEntry->getQualType());
299
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 105 fieldConstants.push_back(defaultFieldValue);
301 }
302
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 47 const auto structType = llvm::cast<llvm::StructType>(symbolType.toLLVMType(sourceFile));
304
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 47 return llvm::ConstantStruct::get(structType, fieldConstants);
305 47 }
306
307 // Interface
308
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 1 if (symbolType.is(TY_INTERFACE)) {
309 1 const auto structType = llvm::cast<llvm::StructType>(symbolType.toLLVMType(sourceFile));
310 1 return llvm::ConstantStruct::get(structType, llvm::Constant::getNullValue(builder.getPtrTy()));
311 }
312
313 − throw CompilerError(INTERNAL_ERROR, "Cannot determine default value for symbol type"); // GCOV_EXCL_LINE
314 }
315
316 43508 llvm::Constant *IRGenerator::getConst(const CompileTimeValue &compileTimeValue, const QualType &type, const ASTNode *node) const {
317
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 43508 if (type.is(TY_DOUBLE))
318
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 1581 return llvm::ConstantFP::get(context, llvm::APFloat(compileTimeValue.doubleValue));
319
320
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 41927 if (type.is(TY_INT))
321 7642 return builder.getInt32(compileTimeValue.intValue);
322
323
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 34285 if (type.is(TY_SHORT))
324 1210 return builder.getInt16(compileTimeValue.shortValue);
325
326
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 33075 if (type.is(TY_LONG))
327 15903 return builder.getInt64(compileTimeValue.longValue);
328
329
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 17172 if (type.isOneOf({TY_BYTE, TY_CHAR}))
330 4397 return builder.getInt8(compileTimeValue.charValue);
331
332
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 12775 if (type.is(TY_STRING)) {
333 8014 const std::string &stringValue = resourceManager.compileTimeStringValues.at(compileTimeValue.stringValueOffset);
334
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 24042 return createGlobalStringConst(ANON_GLOBAL_STRING_NAME, stringValue, node->codeLoc);
335 }
336
337
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 4761 if (type.is(TY_BOOL))
338 4761 return builder.getInt1(compileTimeValue.boolValue);
339
340 ✗ if (type.is(TY_PTR))
341 ✗ return llvm::Constant::getNullValue(builder.getPtrTy());
342
343 − throw CompilerError(UNHANDLED_BRANCH, "Constant fall-through"); // GCOV_EXCL_LINE
344 }
345
346 91538 llvm::BasicBlock *IRGenerator::createBlock(const std::string &blockName /*=""*/) const {
347
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 91538 return llvm::BasicBlock::Create(context, blockName);
348 }
349
350 91538 void IRGenerator::switchToBlock(llvm::BasicBlock *block, llvm::Function *parentFct /*=nullptr*/) {
351
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 91538 assert(block->getParent() == nullptr); // Ensure that the block was not added to a function already
352 // If no parent function were passed, use the current function
353
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 91538 if (!parentFct)
354 59707 parentFct = builder.GetInsertBlock()->getParent();
355 // Append block to current function
356 91538 parentFct->insert(parentFct->end(), block);
357 // Set insert point to the block
358 91538 builder.SetInsertPoint(block);
359 91538 blockAlreadyTerminated = false;
360 91538 }
361
362 26852 void IRGenerator::terminateBlock(const StmtLstNode *stmtLstNode) {
363 26852 diGenerator.setSourceLocation(stmtLstNode->closingBraceCodeLoc);
364 26852 generateScopeCleanup(stmtLstNode);
365 26852 blockAlreadyTerminated = true;
366 26852 }
367
368 30713 void IRGenerator::insertJump(llvm::BasicBlock *targetBlock) {
369
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 30713 if (blockAlreadyTerminated)
370 8599 return;
371 22114 builder.CreateBr(targetBlock);
372 22114 blockAlreadyTerminated = true;
373 }
374
375 25272 void IRGenerator::insertCondJump(llvm::Value *condition, llvm::BasicBlock *trueBlock, llvm::BasicBlock *falseBlock,
376 Likelihood likelihood /*=UNSPECIFIED*/) {
377
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 25272 if (blockAlreadyTerminated)
378 ✗ return;
379 25272 llvm::BranchInst *jumpInst = builder.CreateCondBr(condition, trueBlock, falseBlock);
380 25272 blockAlreadyTerminated = true;
381
382
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 25272 if (likelihood != Likelihood::UNSPECIFIED)
383 4546 mdGenerator.generateBranchWeightsMetadata(jumpInst, likelihood);
384 }
385
386 31818 void IRGenerator::verifyFunction(const llvm::Function *fct, const CodeLoc &codeLoc) const {
387 // Skip the verifying step if the verifier was disabled manually or debug info is emitted
388
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 31818 if (cliOptions.disableVerifier)
389 ✗ return;
390
391 // Verify function
392 31818 std::string output;
393
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 31818 llvm::raw_string_ostream oss(output);
394 − if (llvm::verifyFunction(*fct, &oss)) // LCOV_EXCL_LINE
395 − throw CompilerError(codeLoc, INVALID_FUNCTION, output); // LCOV_EXCL_LINE
396 31818 }
397
398 2045 void IRGenerator::verifyModule(const CodeLoc &codeLoc) const {
399 // Skip the verifying step if the verifier was disabled manually or debug info is emitted
400
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 2045 if (cliOptions.disableVerifier)
401 ✗ return;
402
403 // Verify module
404 2045 std::string output;
405
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 2045 llvm::raw_string_ostream oss(output);
406 − if (llvm::verifyModule(*module, &oss)) // LCOV_EXCL_LINE
407 − throw CompilerError(codeLoc, INVALID_MODULE, output); // LCOV_EXCL_LINE
408 2045 }
409
410 16151 LLVMExprResult IRGenerator::doAssignment(const ASTNode *lhsNode, const ExprNode *rhsNode, const ASTNode *node) {
411 // Get entry of left side
412
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 16151 auto exprResult = std::any_cast<LLVMExprResult>(visit(lhsNode));
413 16151 SymbolTableEntry *entry = exprResult.entry;
414
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 16151 llvm::Value *lhsAddress = entry != nullptr && entry->getQualType().isRef() ? exprResult.refPtr : resolveAddress(exprResult);
415
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 32302 return doAssignment(lhsAddress, entry, rhsNode, node);
416 }
417
418 37461 LLVMExprResult IRGenerator::doAssignment(llvm::Value *lhsAddress, SymbolTableEntry *lhsEntry, const ExprNode *rhsNode,
419 const ASTNode *node, bool isDecl) {
420 // Get symbol type of right side
421
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 37461 const QualType &rhsSType = rhsNode->getEvaluatedSymbolType(manIdx);
422
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 37461 auto rhs = std::any_cast<LLVMExprResult>(visit(rhsNode));
423
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 74922 return doAssignment(lhsAddress, lhsEntry, rhs, rhsSType, node, isDecl);
424 }
425
426 38161 LLVMExprResult IRGenerator::doAssignment(llvm::Value *lhsAddress, SymbolTableEntry *lhsEntry, LLVMExprResult &rhs,
427 const QualType &rhsSType, const ASTNode *node, bool isDecl) {
428 // Deduce some information about the assignment
429
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 38161 const bool isRefAssign = lhsEntry != nullptr && lhsEntry->getQualType().isRef();
430
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 38161 const bool needsCopy = !isRefAssign && rhsSType.removeReferenceWrapper().is(TY_STRUCT) && !rhs.isTemporary();
431
432
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 38161 if (isRefAssign) {
433
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 2894 assert(lhsEntry != nullptr);
434
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 2894 if (isDecl) { // Reference gets initially assigned
435 // Get address of right side
436 1632 llvm::Value *rhsAddress = resolveAddress(rhs);
437
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 1632 assert(rhsAddress != nullptr);
438
439 // Store lhs pointer to rhs
440
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 1632 llvm::Value *refAddress = insertAlloca(builder.getPtrTy());
441 1632 lhsEntry->updateAddress(refAddress);
442 1632 insertStore(rhsAddress, refAddress);
443
444 1632 return LLVMExprResult{.value = rhsAddress, .ptr = refAddress, .entry = lhsEntry};
445 }
446
447 // Reference to reference assignment (only for struct fields that are not initialized yet)
448 // These are only allowed inside a ctor body. In other cases, the value of the reference gets assigned, not the ref itself.
449
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 1262 const bool isInitialFieldRefAssign = isInCtorBody && rhsSType.isRef() && rhs.entry && lhsEntry->isField();
450 // Assigning the result variable
451 1262 const bool isReturnValAssign = lhsEntry->name == RETURN_VARIABLE_NAME;
452
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 1262 if (isInitialFieldRefAssign || isReturnValAssign) {
453 // Get address of right side
454 982 llvm::Value *referencedAddress = resolveAddress(rhs);
455
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 982 assert(referencedAddress != nullptr);
456
457 // Store the rhs* to the lhs**
458 982 insertStore(referencedAddress, lhsAddress);
459
460 982 return LLVMExprResult{.value = referencedAddress, .ptr = lhsAddress, .entry = lhsEntry};
461 }
462
463 // Load referenced address
464
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 280 lhsAddress = insertLoad(builder.getPtrTy(), lhsAddress);
465 }
466
467
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 35547 if (isDecl && rhsSType.is(TY_STRUCT) && rhs.isTemporary()) {
468
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 2953 assert(lhsEntry != nullptr);
469 // Directly set the address to the lhs entry (temp stealing)
470 2953 llvm::Value *rhsAddress = resolveAddress(rhs);
471 2953 lhsEntry->updateAddress(rhsAddress);
472 2953 rhs.entry = lhsEntry;
473 2953 return rhs;
474 }
475
476 // Allocate new memory if the lhs address does not exist
477
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 32594 if (!lhsAddress) {
478
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 17208 assert(lhsEntry != nullptr);
479
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 17208 lhsAddress = insertAlloca(lhsEntry->getQualType());
480 17208 lhsEntry->updateAddress(lhsAddress);
481 }
482
483 // 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
484
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 32594 if (lhsEntry && lhsEntry->getQualType().isPtr() && rhsSType.isArray() && rhsSType.getArraySize() != ARRAY_SIZE_UNKNOWN) {
485 // Get address of right side
486
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 2 llvm::Value *rhsAddress = resolveAddress(rhs);
487
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 2 assert(rhsAddress != nullptr);
488
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 2 llvm::Type *elementTy = rhsSType.toLLVMType(sourceFile);
489
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 2 llvm::Value *indices[2] = {builder.getInt64(0), builder.getInt32(0)};
490
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 2 llvm::Value *firstItemAddress = insertInBoundsGEP(elementTy, rhsAddress, indices);
491
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 2 insertStore(firstItemAddress, lhsAddress);
492 2 return LLVMExprResult{.value = rhsAddress, .ptr = lhsAddress, .entry = lhsEntry};
493 }
494
495 // Handle operator overloads
496
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 32592 if (!isDecl && conversionManager.callsOverloadedOpFct(node, DEFAULT_OP_IDX)) {
497 398 ResolverFct lhsV = [&] { return static_cast<llvm::Value *>(nullptr); };
498
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 398 ResolverFct rhsV = [&] { return resolveValue(rhsSType, rhs); };
499 796 ResolverFct lhsP = [&] { return lhsAddress; };
500 796 ResolverFct rhsP = [&] { return resolveAddress(rhs); };
501 398 return conversionManager.callOperatorOverloadFct<2>(node, {lhsV, lhsP, rhsV, rhsP}, DEFAULT_OP_IDX);
502 398 }
503
504 // Check if we need to copy the rhs to the lhs. This happens for structs
505
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 32194 if (needsCopy) {
506 // Get address of right side
507
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 441 llvm::Value *rhsAddress = resolveAddress(rhs);
508
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 441 assert(rhsAddress != nullptr);
509
510 // If the lhs already holds an initialized, non-trivially-destructible struct, its old value must be
511 // destructed before the copy overwrites it, otherwise its owning members (heap pointers, strings, ...)
512 // would leak. The typechecker only sets a dtor in exactly those cases. To stay correct for a self-
513 // assignment like 'a = a', the destruct + copy are skipped entirely when both sides share the address
514 // (the assignment is a no-op in that case, and destructing first would corrupt the value to copy from).
515
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 441 const auto *assignNode = dynamic_cast<const AssignExprNode *>(node);
516
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 441 const Function *lhsDtor = assignNode ? assignNode->lhsDtorFct.at(manIdx) : nullptr;
517 441 llvm::BasicBlock *bCopyEnd = nullptr;
518
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 441 if (lhsDtor != nullptr) {
519
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 20 llvm::BasicBlock *bCopy = createBlock("assign.copy");
520
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 10 bCopyEnd = createBlock("assign.copy.end");
521
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 10 insertCondJump(builder.CreateICmpEQ(lhsAddress, rhsAddress), bCopyEnd, bCopy);
522
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 10 switchToBlock(bCopy);
523
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 10 generateCtorOrDtorCall(lhsAddress, lhsDtor, {});
524 }
525
526
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 441 const QualType rhsSTypeNonRef = rhsSType.removeReferenceWrapper().toNonConst();
527
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 441 if (rhsSTypeNonRef.isTriviallyCopyable(node)) {
528 // Create shallow copy
529
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 310 llvm::Type *rhsType = rhsSTypeNonRef.toLLVMType(sourceFile);
530
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 310 const std::string copyName = lhsEntry ? lhsEntry->name : "";
531
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 310 generateShallowCopy(rhsAddress, rhsType, lhsAddress, lhsEntry && lhsEntry->isVolatile);
532 310 } else {
533 // Check if we have a copy ctor
534
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 131 Scope *structScope = rhsSTypeNonRef.getBodyScope();
535
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 393 const ArgList args = {{rhsSTypeNonRef.toConstRef(node), rhs.isTemporary()}};
536
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 131 const Function *copyCtor = FunctionManager::lookup(structScope, CTOR_FUNCTION_NAME, rhsSTypeNonRef, args, true);
537
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 131 if (copyCtor != nullptr) {
538 // Call copy ctor
539
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 262 generateCtorOrDtorCall(lhsAddress, copyCtor, {rhsAddress});
540 } else {
541 ✗ const std::string structName = rhsSTypeNonRef.getName();
542 ✗ const std::string msg = "Cannot copy struct '" + structName + "', as it is not trivially copyable and has no copy ctor";
543 ✗ throw SemanticError(node, COPY_CTOR_REQUIRED, msg);
544 ✗ }
545 131 }
546
547 // Close the self-assignment guard
548
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 441 if (bCopyEnd != nullptr) {
549
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 10 insertJump(bCopyEnd);
550
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 10 switchToBlock(bCopyEnd);
551 }
552 441 return LLVMExprResult{.ptr = lhsAddress, .entry = lhsEntry};
553 }
554
555 // Optimization: If we have the address of both sides, we can do a memcpy instead of loading and storing the value
556 31753 llvm::Value *rhsValue = nullptr;
557
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 31753 if (rhsSType.is(TY_STRUCT) && rhs.value == nullptr && rhs.constant == nullptr) {
558 // Create shallow copy
559
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 1641 const QualType rhsSTypeNonRef = rhsSType.removeReferenceWrapper().toNonConst();
560
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 1641 llvm::Type *rhsType = rhsSTypeNonRef.toLLVMType(sourceFile);
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 1641 llvm::Value *rhsAddress = resolveAddress(rhs);
562
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 1641 assert(rhsAddress != nullptr);
563
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 1650 const std::string copyName = lhsEntry ? lhsEntry->name : "";
564
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 1641 generateShallowCopy(rhsAddress, rhsType, lhsAddress, lhsEntry && lhsEntry->isVolatile);
565 1641 } else {
566 // We can load the value from the right side and store it to the left side
567 // Retrieve value of the right side
568 30112 rhsValue = resolveValue(rhsSType, rhs);
569 // Store the value to the address
570 30112 insertStore(rhsValue, lhsAddress, rhsSType);
571 }
572
573 31753 return LLVMExprResult{.value = rhsValue, .ptr = lhsAddress, .entry = lhsEntry};
574
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 398 }
575
576 2324 void IRGenerator::generateShallowCopy(llvm::Value *oldAddress, llvm::Type *varType, llvm::Value *targetAddress,
577 bool isVolatile) const {
578 // Retrieve size to copy
579
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 2324 const llvm::TypeSize typeSize = module->getDataLayout().getTypeAllocSize(varType);
580
581 // Create values for memcpy intrinsic
582
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 2324 llvm::Value *structSize = builder.getInt64(typeSize);
583
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 2324 llvm::Value *copyVolatile = builder.getInt1(isVolatile);
584
585 // Call memcpy intrinsic to execute the shallow copy
586
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 2324 llvm::Function *memcpyFct = stdFunctionManager.getMemcpyIntrinsic();
587
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 2324 assert(targetAddress != nullptr);
588
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 2324 builder.CreateCall(memcpyFct, {targetAddress, oldAddress, structSize, copyVolatile});
589 2324 }
590
591 79268 void IRGenerator::autoDeReferencePtr(llvm::Value *&ptr, QualType &symbolType) {
592
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 136383 while (symbolType.isPtr() || symbolType.isRef()) {
593
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 57115 ptr = insertLoad(symbolType, ptr);
594
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 57115 symbolType = symbolType.getContained();
595 }
596 79268 }
597
598 304 llvm::GlobalVariable *IRGenerator::createGlobalConst(const std::string &baseName, llvm::Constant *constant) const {
599 // Get unused name
600
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 304 const std::string globalName = getUnusedGlobalName(baseName);
601 // Create global
602
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 304 module->getOrInsertGlobal(globalName, constant->getType());
603
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 304 llvm::GlobalVariable *global = module->getNamedGlobal(globalName);
604 // Set initializer to the given constant
605
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 304 global->setInitializer(constant);
606 304 global->setConstant(true);
607
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 304 global->setLinkage(llvm::GlobalValue::PrivateLinkage);
608 304 global->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global);
609 304 return global;
610 304 }
611
612 9240 llvm::GlobalVariable *IRGenerator::createGlobalStringConst(const std::string &baseName, const std::string &value) const {
613 // Get unused name
614
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 9240 const std::string globalName = getUnusedGlobalName(baseName);
615 // Create global
616
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 9240 builder.CreateGlobalString(value, globalName, 0, module);
617
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 9240 llvm::GlobalVariable *global = module->getNamedGlobal(globalName);
618 // If the output should be comparable, fix alignment to 4 bytes
619
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 9240 if (cliOptions.comparableOutput)
620
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 9240 global->setAlignment(llvm::Align(4));
621 9240 return global;
622 9240 }
623
624 9240 llvm::GlobalVariable *IRGenerator::createGlobalStringConst(const std::string &baseName, const std::string &value,
625 const CodeLoc &codeLoc) const {
626 9240 llvm::GlobalVariable *global = createGlobalStringConst(baseName, value);
627 // Create debug info
628
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 9240 if (cliOptions.instrumentation.generateDebugInfo)
629
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 52 diGenerator.generateGlobalStringDebugInfo(global, global->getName().str(), value.length(), codeLoc);
630 9240 return global;
631 }
632
633 16227 std::string IRGenerator::getUnusedGlobalName(const std::string &baseName) const {
634 // Find an unused global name
635 16227 std::string globalName;
636 16227 unsigned int suffixNumber = 0;
637 do {
638
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 469708 globalName = baseName + std::to_string(suffixNumber);
639 469708 suffixNumber++;
640
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 469708 } while (module->getNamedGlobal(globalName) != nullptr);
641 16227 return globalName;
642 ✗ }
643
644 48970 void IRGenerator::materializeConstant(LLVMExprResult &exprResult) {
645 // Skip results, that do not contain a constant or already have a value
646
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 48970 if (exprResult.value != nullptr || exprResult.constant == nullptr)
647 2067 return;
648
649 // Default case: the value to the constant
650 46903 exprResult.value = exprResult.constant;
651 }
652
653 39077 bool IRGenerator::isSymbolDSOLocal(bool isPublic) const {
654 // If we are compiling a shared library and export the global symbol, we need to drop dso_local
655 // because it may be interposed by other shared objects by the dynamic linker.
656
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 39077 return !(isPublic && cliOptions.outputContainer == OutputContainer::SHARED_LIBRARY);
657 }
658
659 20237 llvm::GlobalValue::LinkageTypes IRGenerator::getSymbolLinkageType(bool isPublic) const {
660
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 20237 return isPublic ? llvm::GlobalValue::ExternalLinkage : llvm::GlobalValue::PrivateLinkage;
661 }
662
663 6429 void IRGenerator::attachComdatToSymbol(llvm::GlobalVariable *global, const std::string &comdatName, bool isPublic) const {
664 // MachO does not support comdat annotations
665
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 6429 if (isPublic && cliOptions.targetTriple.getObjectFormat() != llvm::Triple::MachO)
666
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 6345 global->setComdat(module->getOrInsertComdat(comdatName));
667 6429 }
668
669 3944 std::string IRGenerator::getIRString(llvm::Module *llvmModule, const CliOptions &cliOptions) {
670
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 3944 assert(llvmModule != nullptr); // Make sure the module hasn't been moved away
671
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 3944 const bool eliminateTarget = cliOptions.comparableOutput && cliOptions.isNativeTarget;
672
673 // Backup target triple and data layout
674
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 3944 const llvm::Triple targetTriple = llvmModule->getTargetTriple();
675
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 3944 const std::string targetDataLayout = llvmModule->getDataLayoutStr();
676 // Remove target triple and data layout
677
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 3944 if (eliminateTarget) {
678 3846 llvmModule->setTargetTriple(llvm::Triple());
679
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 3846 llvmModule->setDataLayout("");
680 }
681
682 // Get IR string
683 3944 std::string output;
684
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 3944 llvm::raw_string_ostream oss(output);
685
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 3944 llvmModule->print(oss, nullptr);
686
687 // Restore target triple and data layout
688
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 3944 if (eliminateTarget) {
689
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 3846 llvmModule->setTargetTriple(targetTriple);
690
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 3846 llvmModule->setDataLayout(targetDataLayout);
691 }
692
693 3944 return output;
694 3944 }
695
696 /**
697 * Returns the operator function list for the current manifestation and the given node
698 *
699 * @param node Node to retrieve the op fct pointer list from
700 * @return Op fct pointer list
701 */
702 59051 const std::vector<const Function *> &IRGenerator::getOpFctPointers(const ASTNode *node) const {
703
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 59051 assert(node->getOpFctPointers()->size() > manIdx);
704 59051 return node->getOpFctPointers()->at(manIdx);
705 }
706
707 } // namespace spice::compiler
708