GCC Code Coverage Report

Directory: ../
File: src/irgenerator/GenBuiltinFunctions.cpp
Date: 2025-03-05 01:50:32
Exec Total Coverage
Lines: 103 109 94.5%
Functions: 7 7 100.0%
Branches: 157 308 51.0%
Line Branch Exec Source
1 // Copyright (c) 2021-2025 ChilliBits. All rights reserved.
2
3 #include "IRGenerator.h"
4
5 #include <ast/ASTNodes.h>
6 #include <global/GlobalResourceManager.h>
7 #include <llvm/IR/InlineAsm.h>
8
9 #include <llvm/IR/Module.h>
10
11 namespace spice::compiler {
12
13 1481 std::any IRGenerator::visitBuiltinCall(const BuiltinCallNode *node) {
14
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 1481 if (node->printfCall)
15 709 return visit(node->printfCall);
16
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 772 if (node->sizeofCall)
17 127 return visit(node->sizeofCall);
18
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 645 if (node->alignofCall)
19 11 return visit(node->alignofCall);
20
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 634 if (node->lenCall)
21 49 return visit(node->lenCall);
22
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 585 if (node->panicCall)
23 584 return visit(node->panicCall);
24
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 1 if (node->sysCall)
25 1 return visit(node->sysCall);
26 − assert_fail("Unknown builtin call"); // LCOV_EXCL_LINE
27 return nullptr; // LCOV_EXCL_LINE
28 }
29
30 709 std::any IRGenerator::visitPrintfCall(const PrintfCallNode *node) {
31 // Retrieve printf function
32
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 709 llvm::Function *printfFct = stdFunctionManager.getPrintfFct();
33
34 // Push the template string as first argument
35 709 std::vector<llvm::Value *> printfArgs;
36
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 1418 llvm::Constant *templateString = createGlobalStringConst("printf.str.", node->templatedString, node->codeLoc);
37
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 709 printfArgs.push_back(templateString);
38
39 // Collect replacement arguments
40
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 1310 for (const AssignExprNode *arg : node->args) {
41 // Retrieve type of argument
42
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 601 const QualType argSymbolType = arg->getEvaluatedSymbolType(manIdx);
43
44 // Re-map some values
45 llvm::Value *argVal;
46
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 601 if (argSymbolType.isArray()) {
47 ✗ llvm::Value *argValPtr = resolveAddress(arg);
48 ✗ llvm::Value *indices[2] = {builder.getInt64(0), builder.getInt32(0)};
49 ✗ llvm::Type *argType = argSymbolType.toLLVMType(sourceFile);
50 ✗ argVal = insertInBoundsGEP(argType, argValPtr, indices);
51
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 601 } 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);
56 } else {
57
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 543 argVal = resolveValue(arg);
58 }
59
60 // Extend all integer types lower than 32 bit to 32 bit
61
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 601 if (argSymbolType.removeReferenceWrapper().isOneOf({TY_SHORT, TY_BYTE, TY_CHAR, TY_BOOL}))
62
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 83 argVal = builder.CreateIntCast(argVal, builder.getInt32Ty(), argSymbolType.removeReferenceWrapper().isSigned());
63
64
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 601 printfArgs.push_back(argVal);
65 }
66
67 // Call printf function
68
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 709 llvm::CallInst *returnValue = builder.CreateCall(printfFct, printfArgs);
69
70 // Add noundef attribute to template string
71
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 709 returnValue->addParamAttr(0, llvm::Attribute::NoUndef);
72
73
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 1418 return LLVMExprResult{.value = returnValue};
74 709 }
75
76 127 std::any IRGenerator::visitSizeofCall(const SizeofCallNode *node) {
77 llvm::Type *type;
78
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 127 if (node->isType) { // Size of type
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 111 type = any_cast<llvm::Type *>(visit(node->dataType));
80 } else { // Size of value
81
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 16 type = node->assignExpr->getEvaluatedSymbolType(manIdx).toLLVMType(sourceFile);
82 }
83 // Calculate size at compile-time
84
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 127 const llvm::TypeSize sizeInBytes = module->getDataLayout().getTypeAllocSize(type);
85
86 // Return size value
87
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 127 llvm::Value *sizeValue = builder.getInt64(sizeInBytes);
88
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 254 return LLVMExprResult{.value = sizeValue};
89 }
90
91 11 std::any IRGenerator::visitAlignofCall(const AlignofCallNode *node) {
92 llvm::Type *type;
93
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 11 if (node->isType) { // Align of type
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 1 type = any_cast<llvm::Type *>(visit(node->dataType));
95 } else { // Align of value
96
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 10 type = node->assignExpr->getEvaluatedSymbolType(manIdx).toLLVMType(sourceFile);
97 }
98 // Calculate size at compile-time
99
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 11 const llvm::Align alignmentInBytes = module->getDataLayout().getABITypeAlign(type);
100
101 // Return align value
102
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 11 llvm::Value *alignValue = builder.getInt64(alignmentInBytes.value());
103
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 22 return LLVMExprResult{.value = alignValue};
104 }
105
106 49 std::any IRGenerator::visitLenCall(const LenCallNode *node) {
107 // Check if the length is fixed and known via the symbol type
108
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 49 QualType symbolType = node->assignExpr->getEvaluatedSymbolType(manIdx);
109
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 49 symbolType = symbolType.removeReferenceWrapper();
110
111 llvm::Value *lengthValue;
112
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 49 if (symbolType.is(TY_STRING)) {
113
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 25 llvm::Function *getRawLengthFct = stdFunctionManager.getStringGetRawLengthStringFct();
114
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 25 lengthValue = builder.CreateCall(getRawLengthFct, resolveValue(node->assignExpr));
115 } else {
116
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 24 assert(symbolType.isArray() && symbolType.getArraySize() != ARRAY_SIZE_UNKNOWN);
117 // Return length value
118
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 24 lengthValue = builder.getInt64(symbolType.getArraySize());
119 }
120
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 98 return LLVMExprResult{.value = lengthValue};
121 }
122
123 584 std::any IRGenerator::visitPanicCall(const PanicCallNode *node) {
124
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 584 llvm::PointerType *ptrTy = builder.getPtrTy();
125
126 // Get value for stderr
127 llvm::Value *stdErr;
128
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 584 if (cliOptions.targetOs == "windows") {
129 ✗ llvm::Function *getAcrtIOFuncFct = stdFunctionManager.getAcrtIOFuncFct();
130 ✗ stdErr = builder.CreateCall(getAcrtIOFuncFct, {builder.getInt32(/*constant for stderr*/ 2)});
131 } else {
132 584 constexpr auto globalName = "stderr";
133
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 584 module->getOrInsertGlobal(globalName, ptrTy);
134
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 584 llvm::GlobalVariable *stdErrPtr = module->getNamedGlobal(globalName);
135
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 584 stdErrPtr->setLinkage(llvm::GlobalVariable::ExternalLinkage);
136 584 stdErrPtr->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Local);
137
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 584 stdErrPtr->setAlignment(llvm::MaybeAlign(8));
138
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 1168 stdErr = insertLoad(ptrTy, stdErrPtr);
139 }
140
141 // Create constant for error message
142
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 584 const std::string codeLoc = node->codeLoc.toPrettyString();
143
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 584 const std::string templateStr = "Program panicked at " + codeLoc + ": %s\n" + node->getErrorMessage() + "\n";
144
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 1168 llvm::Constant *globalString = builder.CreateGlobalString(templateStr, getUnusedGlobalName(ANON_GLOBAL_STRING_NAME));
145
146 // Get actual error message
147
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 584 llvm::Value *errorObjPtr = resolveAddress(node->assignExpr);
148
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 584 llvm::Type *errorObjTy = node->assignExpr->getEvaluatedSymbolType(manIdx).toLLVMType(sourceFile);
149
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 584 llvm::Value *errorMessagePtr = insertStructGEP(errorObjTy, errorObjPtr, 1);
150
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 584 llvm::Value *errorMessage = insertLoad(ptrTy, errorMessagePtr);
151
152 // Print the error message to stderr
153
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 584 llvm::Function *fprintfFct = stdFunctionManager.getFPrintfFct();
154
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 584 builder.CreateCall(fprintfFct, {stdErr, globalString, errorMessage});
155
156 // Generate call to exit()
157
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 584 llvm::Function *exitFct = stdFunctionManager.getExitFct();
158
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 584 builder.CreateCall(exitFct, builder.getInt32(EXIT_FAILURE));
159 // Create unreachable instruction
160
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 584 builder.CreateUnreachable();
161 // Unreachable counts as terminator
162
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 584 terminateBlock(node->getNextOuterStmtLst());
163
164
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 1168 return nullptr;
165 584 }
166
167 1 std::any IRGenerator::visitSysCall(const SysCallNode *node) {
168 // Determine the required number of operands.
169 // (We assume at least one argument is provided: the syscall number.)
170 1 const auto requiredRegs = static_cast<uint8_t>(node->args.size());
171
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 1 assert(requiredRegs >= 1 && requiredRegs <= 6);
172
173 // Create the asm and constraint strings based on the required number of registers.
174
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 1 const std::string asmString = getSysCallAsmString(requiredRegs);
175
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 1 const std::string constraints = getSysCallConstraintString(requiredRegs);
176
177 // Create the LLVM function type for the inline asm with only the needed operands.
178
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 1 llvm::Type *int64Ty = builder.getInt64Ty();
179
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 1 const std::vector argTypes(requiredRegs, int64Ty);
180
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 1 llvm::FunctionType *fctType = llvm::FunctionType::get(builder.getVoidTy(), argTypes, false);
181
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 1 llvm::InlineAsm *inlineAsm = llvm::InlineAsm::get(fctType, asmString, constraints, true);
182
183 // Build the argument list (each provided argument is converted to i64).
184 1 std::vector<llvm::Value *> argValues;
185
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 1 argValues.reserve(requiredRegs);
186
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 5 for (uint8_t i = 0; i < requiredRegs; i++) {
187
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 4 const AssignExprNode *argNode = node->args.at(i);
188
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 4 const QualType &argType = argNode->getEvaluatedSymbolType(manIdx);
189
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 4 assert(argType.isOneOf({TY_INT, TY_LONG, TY_SHORT, TY_BOOL, TY_BYTE, TY_PTR, TY_STRING}));
190
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 4 if (argType.isOneOf({TY_PTR, TY_STRING}))
191
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 1 argValues.push_back(builder.CreatePtrToInt(resolveValue(argNode), builder.getInt64Ty()));
192 else
193
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 3 argValues.push_back(builder.CreateZExt(resolveValue(argNode), builder.getInt64Ty()));
194 }
195
196 // Generate the call using only the required number of arguments.
197
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 1 llvm::Value *result = builder.CreateCall(inlineAsm, argValues);
198
199
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 2 return LLVMExprResult{.value = result};
200 1 }
201
202 } // namespace spice::compiler
203