GCC Code Coverage Report

Directory: ../
File: src/irgenerator/GenBuiltinFunctions.cpp
Date: 2025-05-08 21:00:15
Exec Total Coverage
Lines: 110 116 94.8%
Functions: 8 8 100.0%
Branches: 163 318 51.3%
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 1485 std::any IRGenerator::visitBuiltinCall(const BuiltinCallNode *node) {
15
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 1485 if (node->printfCall)
16 711 return visit(node->printfCall);
17
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 774 if (node->sizeofCall)
18 127 return visit(node->sizeofCall);
19
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 647 if (node->alignofCall)
20 11 return visit(node->alignofCall);
21
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 636 if (node->typeidCall)
22 2 return visit(node->typeidCall);
23
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 634 if (node->lenCall)
24 49 return visit(node->lenCall);
25
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 585 if (node->panicCall)
26 584 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
33 711 std::any IRGenerator::visitPrintfCall(const PrintfCallNode *node) {
34 // Retrieve printf function
35
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 711 llvm::Function *printfFct = stdFunctionManager.getPrintfFct();
36
37 // Push the template string as first argument
38 711 std::vector<llvm::Value *> printfArgs;
39
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 1422 llvm::Constant *templateString = createGlobalStringConst("printf.str.", node->templatedString, node->codeLoc);
40
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 711 printfArgs.push_back(templateString);
41
42 // Collect replacement arguments
43
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 1314 for (const AssignExprNode *arg : node->args) {
44 // Retrieve type of argument
45
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 603 const QualType argSymbolType = arg->getEvaluatedSymbolType(manIdx);
46
47 // Re-map some values
48 llvm::Value *argVal;
49
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 603 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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 603 } else if (argSymbolType.getBase().isStringObj()) {
55
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 58 llvm::Value *argValPtr = resolveAddress(arg);
56
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 58 llvm::Type *argBaseType = argSymbolType.getBase().toLLVMType(sourceFile);
57
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 58 argValPtr = insertStructGEP(argBaseType, argValPtr, 0);
58
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 116 argVal = insertLoad(builder.getPtrTy(), argValPtr);
59 } else {
60
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 545 argVal = resolveValue(arg);
61 }
62
63 // Extend all integer types lower than 32 bit to 32 bit
64
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 603 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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 603 printfArgs.push_back(argVal);
68 }
69
70 // Call printf function
71
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 711 llvm::CallInst *returnValue = builder.CreateCall(printfFct, printfArgs);
72
73 // Add noundef attribute to template string
74
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 711 returnValue->addParamAttr(0, llvm::Attribute::NoUndef);
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76
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 1422 return LLVMExprResult{.value = returnValue};
77 711 }
78
79 127 std::any IRGenerator::visitSizeofCall(const SizeofCallNode *node) {
80 llvm::Type *type;
81
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 127 if (node->isType) { // Size of type
82
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 111 type = any_cast<llvm::Type *>(visit(node->dataType));
83 } else { // Size of value
84
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 16 type = node->assignExpr->getEvaluatedSymbolType(manIdx).toLLVMType(sourceFile);
85 }
86 // Calculate size at compile-time
87
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 127 const llvm::TypeSize sizeInBytes = module->getDataLayout().getTypeAllocSize(type);
88
89 // Return size value
90
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 127 llvm::Value *sizeValue = builder.getInt64(sizeInBytes);
91
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 254 return LLVMExprResult{.value = sizeValue};
92 }
93
94 11 std::any IRGenerator::visitAlignofCall(const AlignofCallNode *node) {
95 llvm::Type *type;
96
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 11 if (node->isType) { // Align of type
97
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 1 type = any_cast<llvm::Type *>(visit(node->dataType));
98 } else { // Align of value
99
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 10 type = node->assignExpr->getEvaluatedSymbolType(manIdx).toLLVMType(sourceFile);
100 }
101 // Calculate size at compile-time
102
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 11 const llvm::Align alignmentInBytes = module->getDataLayout().getABITypeAlign(type);
103
104 // Return align value
105
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 11 llvm::Value *alignValue = builder.getInt64(alignmentInBytes.value());
106
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 22 return LLVMExprResult{.value = alignValue};
107 }
108
109 2 std::any IRGenerator::visitTypeidCall(const TypeidCallNode *node) {
110 // Return type id value
111
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 2 const QualType qualType = node->assignExpr->getEvaluatedSymbolType(manIdx);
112
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 2 const uint64_t typeId = TypeRegistry::getTypeHash(*qualType.getType());
113
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 2 llvm::Value *typeIdValue = builder.getInt64(typeId);
114
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 4 return LLVMExprResult{.value = typeIdValue};
115 }
116
117 49 std::any IRGenerator::visitLenCall(const LenCallNode *node) {
118 // Check if the length is fixed and known via the symbol type
119
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 49 QualType symbolType = node->assignExpr->getEvaluatedSymbolType(manIdx);
120
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 49 symbolType = symbolType.removeReferenceWrapper();
121
122 llvm::Value *lengthValue;
123
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 49 if (symbolType.is(TY_STRING)) {
124
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 25 llvm::Function *getRawLengthFct = stdFunctionManager.getStringGetRawLengthStringFct();
125
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 25 lengthValue = builder.CreateCall(getRawLengthFct, resolveValue(node->assignExpr));
126 } else {
127
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 24 assert(symbolType.isArray() && symbolType.getArraySize() != ARRAY_SIZE_UNKNOWN);
128 // Return length value
129
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 24 lengthValue = builder.getInt64(symbolType.getArraySize());
130 }
131
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 98 return LLVMExprResult{.value = lengthValue};
132 }
133
134 584 std::any IRGenerator::visitPanicCall(const PanicCallNode *node) {
135
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 584 llvm::PointerType *ptrTy = builder.getPtrTy();
136
137 // Get value for stderr
138 llvm::Value *stdErr;
139
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 584 if (cliOptions.targetOs == "windows") {
140 ✗ llvm::Function *getAcrtIOFuncFct = stdFunctionManager.getAcrtIOFuncFct();
141 ✗ stdErr = builder.CreateCall(getAcrtIOFuncFct, {builder.getInt32(/*constant for stderr*/ 2)});
142 } else {
143 584 constexpr auto globalName = "stderr";
144
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 584 module->getOrInsertGlobal(globalName, ptrTy);
145
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 584 llvm::GlobalVariable *stdErrPtr = module->getNamedGlobal(globalName);
146
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 584 stdErrPtr->setLinkage(llvm::GlobalVariable::ExternalLinkage);
147 584 stdErrPtr->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Local);
148
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 584 stdErrPtr->setAlignment(llvm::MaybeAlign(8));
149
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 1168 stdErr = insertLoad(ptrTy, stdErrPtr);
150 }
151
152 // Create constant for error message
153
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 584 const std::string codeLoc = node->codeLoc.toPrettyString();
154
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 584 const std::string templateStr = "Program panicked at " + codeLoc + ": %s\n" + node->getErrorMessage() + "\n";
155
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 1168 llvm::Constant *globalString = builder.CreateGlobalString(templateStr, getUnusedGlobalName(ANON_GLOBAL_STRING_NAME));
156
157 // Get actual error message
158
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 584 llvm::Value *errorObjPtr = resolveAddress(node->assignExpr);
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 584 llvm::Type *errorObjTy = node->assignExpr->getEvaluatedSymbolType(manIdx).toLLVMType(sourceFile);
160
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 584 llvm::Value *errorMessagePtr = insertStructGEP(errorObjTy, errorObjPtr, 1);
161
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 584 llvm::Value *errorMessage = insertLoad(ptrTy, errorMessagePtr);
162
163 // Print the error message to stderr
164
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 584 llvm::Function *fprintfFct = stdFunctionManager.getFPrintfFct();
165
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 584 builder.CreateCall(fprintfFct, {stdErr, globalString, errorMessage});
166
167 // Generate call to exit()
168
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 584 llvm::Function *exitFct = stdFunctionManager.getExitFct();
169
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 584 builder.CreateCall(exitFct, builder.getInt32(EXIT_FAILURE));
170 // Create unreachable instruction
171
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 584 builder.CreateUnreachable();
172 // Unreachable counts as terminator
173
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 584 terminateBlock(node->getNextOuterStmtLst());
174
175
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 1168 return nullptr;
176 584 }
177
178 1 std::any IRGenerator::visitSysCall(const SysCallNode *node) {
179 // Determine the required number of operands.
180 // (We assume at least one argument is provided: the syscall number.)
181 1 const auto requiredRegs = static_cast<uint8_t>(node->args.size());
182
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 1 assert(requiredRegs >= 1 && requiredRegs <= 6);
183
184 // Create the asm and constraint strings based on the required number of registers.
185
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 1 const std::string asmString = getSysCallAsmString(requiredRegs);
186
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 1 const std::string constraints = getSysCallConstraintString(requiredRegs);
187
188 // Create the LLVM function type for the inline asm with only the needed operands.
189
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 1 llvm::Type *int64Ty = builder.getInt64Ty();
190
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 1 const std::vector argTypes(requiredRegs, int64Ty);
191
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 1 llvm::FunctionType *fctType = llvm::FunctionType::get(builder.getVoidTy(), argTypes, false);
192
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 1 llvm::InlineAsm *inlineAsm = llvm::InlineAsm::get(fctType, asmString, constraints, true);
193
194 // Build the argument list (each provided argument is converted to i64).
195 1 std::vector<llvm::Value *> argValues;
196
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 1 argValues.reserve(requiredRegs);
197
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 5 for (uint8_t i = 0; i < requiredRegs; i++) {
198
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 4 const AssignExprNode *argNode = node->args.at(i);
199
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 4 const QualType &argType = argNode->getEvaluatedSymbolType(manIdx);
200
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 4 assert(argType.isOneOf({TY_INT, TY_LONG, TY_SHORT, TY_BOOL, TY_BYTE, TY_PTR, TY_STRING}));
201
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 4 if (argType.isOneOf({TY_PTR, TY_STRING}))
202
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 1 argValues.push_back(builder.CreatePtrToInt(resolveValue(argNode), builder.getInt64Ty()));
203 else
204
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 3 argValues.push_back(builder.CreateZExt(resolveValue(argNode), builder.getInt64Ty()));
205 }
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207 // Generate the call using only the required number of arguments.
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 1 llvm::Value *result = builder.CreateCall(inlineAsm, argValues);
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 2 return LLVMExprResult{.value = result};
211 1 }
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213 } // namespace spice::compiler
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