GCC Code Coverage Report

Directory: ../
File: src/irgenerator/GenBuiltinFunctions.cpp
Date: 2025-11-06 00:20:37
Coverage Exec Excl Total
Lines: 95.0% 114 1 121
Functions: 100.0% 8 0 8
Branches: 51.5% 168 0 326
Line Branch Exec Source
1 // Copyright (c) 2021-2025 ChilliBits. All rights reserved.
2
3 #include "IRGenerator.h"
4 #include "global/TypeRegistry.h"
5
6 #include <ast/ASTNodes.h>
7 #include <global/GlobalResourceManager.h>
8 #include <llvm/IR/InlineAsm.h>
9
10 #include <llvm/IR/Module.h>
11
12 namespace spice::compiler {
13
14 1609 std::any IRGenerator::visitBuiltinCall(const BuiltinCallNode *node) {
15
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 1609 if (node->printfCall)
16 732 return visit(node->printfCall);
17
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 877 if (node->sizeofCall)
18 149 return visit(node->sizeofCall);
19
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 728 if (node->alignofCall)
20 11 return visit(node->alignofCall);
21
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 717 if (node->typeidCall)
22 2 return visit(node->typeidCall);
23
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 715 if (node->lenCall)
24 47 return visit(node->lenCall);
25
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 668 if (node->panicCall)
26 667 return visit(node->panicCall);
27
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 1 if (node->sysCall)
28 1 return visit(node->sysCall);
29 − assert_fail("Unknown builtin call"); // LCOV_EXCL_LINE
30 return nullptr; // LCOV_EXCL_LINE
31 }
32
33 732 std::any IRGenerator::visitPrintfCall(const PrintfCallNode *node) {
34 // Retrieve printf function
35
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 732 llvm::Function *printfFct = stdFunctionManager.getPrintfFct();
36
37 // Push the template string as first argument
38 732 std::vector<llvm::Value *> printfArgs;
39
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 1464 llvm::Constant *templateString = createGlobalStringConst("printf.str.", node->templatedString, node->codeLoc);
40
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 732 printfArgs.push_back(templateString);
41
42 // Collect replacement arguments
43
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 1355 for (const AssignExprNode *arg : node->args) {
44 // Retrieve type of argument
45
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 623 const QualType argSymbolType = arg->getEvaluatedSymbolType(manIdx);
46
47 // Re-map some values
48 llvm::Value *argVal;
49
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 623 if (argSymbolType.isArray()) {
50 ✗ llvm::Value *argValPtr = resolveAddress(arg);
51 ✗ llvm::Value *indices[2] = {builder.getInt64(0), builder.getInt32(0)};
52 ✗ llvm::Type *argType = argSymbolType.toLLVMType(sourceFile);
53 ✗ argVal = insertInBoundsGEP(argType, argValPtr, indices);
54
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 623 } else if (argSymbolType.getBase().isStringObj()) {
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 58 llvm::Value *argValPtr = resolveAddress(arg);
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 58 llvm::Type *argBaseType = argSymbolType.getBase().toLLVMType(sourceFile);
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 58 argValPtr = insertStructGEP(argBaseType, argValPtr, 0);
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 116 argVal = insertLoad(builder.getPtrTy(), argValPtr);
59 } else {
60
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 565 argVal = resolveValue(arg);
61 }
62
63 // Extend all integer types lower than 32 bit to 32 bit
64
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 623 if (argSymbolType.removeReferenceWrapper().isOneOf({TY_SHORT, TY_BYTE, TY_CHAR, TY_BOOL}))
65
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 83 argVal = builder.CreateIntCast(argVal, builder.getInt32Ty(), argSymbolType.removeReferenceWrapper().isSigned());
66
67
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 623 printfArgs.push_back(argVal);
68 }
69
70 // Call printf function
71
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 732 llvm::CallInst *callInst = builder.CreateCall(printfFct, printfArgs);
72
73 // Add noundef attribute to return value and all arguments
74
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 732 callInst->addRetAttr(llvm::Attribute::NoUndef);
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 2087 for (size_t i = 0; i < printfArgs.size(); i++)
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 1355 callInst->addParamAttr(i, llvm::Attribute::NoUndef);
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78
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 1464 return LLVMExprResult{.value = callInst};
79 732 }
80
81 149 std::any IRGenerator::visitSizeofCall(const SizeofCallNode *node) {
82 llvm::Type *type;
83
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 149 if (node->isType) { // Size of type
84
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 126 type = any_cast<llvm::Type *>(visit(node->dataType));
85 } else { // Size of value
86
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 23 type = node->assignExpr->getEvaluatedSymbolType(manIdx).toLLVMType(sourceFile);
87 }
88 // Calculate size at compile-time
89
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 149 const llvm::TypeSize sizeInBytes = module->getDataLayout().getTypeAllocSize(type);
90
91 // Return size value
92
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 149 llvm::Value *sizeValue = builder.getInt64(sizeInBytes);
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 298 return LLVMExprResult{.value = sizeValue};
94 }
95
96 11 std::any IRGenerator::visitAlignofCall(const AlignofCallNode *node) {
97 llvm::Type *type;
98
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 11 if (node->isType) { // Align of type
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 1 type = any_cast<llvm::Type *>(visit(node->dataType));
100 } else { // Align of value
101
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 10 type = node->assignExpr->getEvaluatedSymbolType(manIdx).toLLVMType(sourceFile);
102 }
103 // Calculate size at compile-time
104
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 11 const llvm::Align alignmentInBytes = module->getDataLayout().getABITypeAlign(type);
105
106 // Return align value
107
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 11 llvm::Value *alignValue = builder.getInt64(alignmentInBytes.value());
108
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 22 return LLVMExprResult{.value = alignValue};
109 }
110
111 2 std::any IRGenerator::visitTypeidCall(const TypeidCallNode *node) {
112 // Return type id value
113
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 2 const QualType qualType = node->assignExpr->getEvaluatedSymbolType(manIdx);
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 2 const uint64_t typeId = TypeRegistry::getTypeHash(*qualType.getType());
115
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 2 llvm::Value *typeIdValue = builder.getInt64(typeId);
116
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 4 return LLVMExprResult{.value = typeIdValue};
117 }
118
119 47 std::any IRGenerator::visitLenCall(const LenCallNode *node) {
120 // Check if the length is fixed and known via the symbol type
121
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 47 QualType symbolType = node->assignExpr->getEvaluatedSymbolType(manIdx);
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 47 symbolType = symbolType.removeReferenceWrapper();
123
124 llvm::Value *lengthValue;
125
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 47 if (symbolType.is(TY_STRING)) {
126
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 23 llvm::Function *getRawLengthFct = stdFunctionManager.getStringGetRawLengthStringFct();
127
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 23 lengthValue = builder.CreateCall(getRawLengthFct, resolveValue(node->assignExpr));
128 } else {
129
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 24 assert(symbolType.isArray() && symbolType.getArraySize() != ARRAY_SIZE_UNKNOWN);
130 // Return length value
131
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 24 lengthValue = builder.getInt64(symbolType.getArraySize());
132 }
133
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 94 return LLVMExprResult{.value = lengthValue};
134 }
135
136 667 std::any IRGenerator::visitPanicCall(const PanicCallNode *node) {
137
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 667 llvm::PointerType *ptrTy = builder.getPtrTy();
138
139 // Get value for stderr
140 llvm::Value *stdErr;
141
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 667 if (cliOptions.targetTriple.isOSWindows()) {
142 ✗ llvm::Function *getAcrtIOFuncFct = stdFunctionManager.getAcrtIOFuncFct();
143 ✗ stdErr = builder.CreateCall(getAcrtIOFuncFct, {builder.getInt32(/*constant for stderr*/ 2)});
144 } else {
145 667 constexpr auto globalName = "stderr";
146
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 667 module->getOrInsertGlobal(globalName, ptrTy);
147
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 667 llvm::GlobalVariable *stdErrPtr = module->getNamedGlobal(globalName);
148
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 667 stdErrPtr->setLinkage(llvm::GlobalVariable::ExternalLinkage);
149 667 stdErrPtr->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Local);
150
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 667 stdErrPtr->setAlignment(llvm::MaybeAlign(8));
151
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 1334 stdErr = insertLoad(ptrTy, stdErrPtr);
152 }
153
154 // Create constant for error message
155
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 667 const std::string codeLoc = node->codeLoc.toPrettyString();
156
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 667 const std::string templateStr = "Program panicked at " + codeLoc + ": %s\n" + node->getErrorMessage() + "\n";
157
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 1334 llvm::GlobalVariable *globalString = builder.CreateGlobalString(templateStr, getUnusedGlobalName(ANON_GLOBAL_STRING_NAME));
158
159 // If the output should be comparable, fix alignment to 4 bytes
160
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 667 if (cliOptions.comparableOutput)
161
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 667 globalString->setAlignment(llvm::Align(4));
162
163 // Get actual error message
164
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 667 llvm::Value *errorObjPtr = resolveAddress(node->assignExpr);
165
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 667 llvm::Type *errorObjTy = node->assignExpr->getEvaluatedSymbolType(manIdx).toLLVMType(sourceFile);
166
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 667 llvm::Value *errorMessagePtr = insertStructGEP(errorObjTy, errorObjPtr, 1);
167
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 667 llvm::Value *errorMessage = insertLoad(ptrTy, errorMessagePtr);
168
169 // Print the error message to stderr
170
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 667 llvm::Function *fprintfFct = stdFunctionManager.getFPrintfFct();
171
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 667 builder.CreateCall(fprintfFct, {stdErr, globalString, errorMessage});
172
173 // Generate call to exit()
174
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 667 llvm::Function *exitFct = stdFunctionManager.getExitFct();
175
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 667 builder.CreateCall(exitFct, builder.getInt32(EXIT_FAILURE));
176 // Create unreachable instruction
177
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 667 builder.CreateUnreachable();
178 // Unreachable counts as terminator
179
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 667 terminateBlock(node->getNextOuterStmtLst());
180
181
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 1334 return nullptr;
182 667 }
183
184 1 std::any IRGenerator::visitSysCall(const SysCallNode *node) {
185 // Determine the required number of operands.
186 // (We assume at least one argument is provided: the syscall number.)
187 1 const auto requiredRegs = static_cast<uint8_t>(node->args.size());
188
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 1 assert(requiredRegs >= 1 && requiredRegs <= 6);
189
190 // Create the asm and constraint strings based on the required number of registers.
191
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 1 const std::string asmString = getSysCallAsmString(requiredRegs);
192
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 1 const std::string constraints = getSysCallConstraintString(requiredRegs);
193
194 // Create the LLVM function type for the inline asm with only the needed operands.
195
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 1 llvm::Type *int64Ty = builder.getInt64Ty();
196
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 1 const std::vector argTypes(requiredRegs, int64Ty);
197
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 1 llvm::FunctionType *fctType = llvm::FunctionType::get(builder.getVoidTy(), argTypes, false);
198
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 1 llvm::InlineAsm *inlineAsm = llvm::InlineAsm::get(fctType, asmString, constraints, true);
199
200 // Build the argument list (each provided argument is converted to i64).
201 1 std::vector<llvm::Value *> argValues;
202
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 1 argValues.reserve(requiredRegs);
203
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 5 for (uint8_t i = 0; i < requiredRegs; i++) {
204
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 4 const AssignExprNode *argNode = node->args.at(i);
205
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 4 const QualType &argType = argNode->getEvaluatedSymbolType(manIdx);
206
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 4 assert(argType.isOneOf({TY_INT, TY_LONG, TY_SHORT, TY_BOOL, TY_BYTE, TY_PTR, TY_STRING}));
207
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 4 if (argType.isOneOf({TY_PTR, TY_STRING}))
208
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 1 argValues.push_back(builder.CreatePtrToInt(resolveValue(argNode), builder.getInt64Ty()));
209 else
210
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 3 argValues.push_back(builder.CreateZExt(resolveValue(argNode), builder.getInt64Ty()));
211 }
212
213 // Generate the call using only the required number of arguments.
214
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 1 llvm::Value *result = builder.CreateCall(inlineAsm, argValues);
215
216
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 2 return LLVMExprResult{.value = result};
217 1 }
218
219 } // namespace spice::compiler
220