GCC Code Coverage Report

Directory: ../
Coverage: low: ≥ 0% medium: ≥ 75.0% high: ≥ 90.0%
Coverage Exec / Excl / Total
Lines: 96.2% 101 / 0 / 105
Functions: 100.0% 5 / 0 / 5
Branches: 51.3% 159 / 0 / 310
src/irgenerator/GenBuiltinFunctions.cpp
Line Branch Exec Source
1 // Copyright (c) 2021-2026 ChilliBits. All rights reserved.
2
3 #include "IRGenerator.h"
4
5 #include <ast/ASTNodes.h>
6 #include <driver/Driver.h>
7 #include <global/GlobalResourceManager.h>
8 #include <global/TypeRegistry.h>
9 #include <typechecker/Builtins.h>
10 #include <typechecker/TypeChecker.h>
11
12 #include <llvm/IR/InlineAsm.h>
13 #include <llvm/IR/Module.h>
14
15 namespace spice::compiler {
16
17 1777 std::any IRGenerator::visitBuiltinCall(const FctCallNode *node) {
18 // If we have a compile time value, but the computation is still there, we can simply use this constant value
19
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 1777 if (node->hasCompileTimeValue(manIdx)) {
20
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 206 llvm::Constant *value = getConst(node->getCompileTimeValue(manIdx), node->getEvaluatedSymbolType(manIdx), node);
21
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 412 return LLVMExprResult{.constant = value};
22 }
23
24 // If we need to perform runtime actions, call the specified IRGenerator delegate
25
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 1571 assert(BUILTIN_FUNCTIONS_MAP.contains(node->fqFunctionName) && "Builtin function not implemented!");
26
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 1571 const BuiltinFunctionInfo &info = BUILTIN_FUNCTIONS_MAP.find(node->fqFunctionName)->second;
27
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 1571 assert(info.irGeneratorVisitMethod != nullptr);
28
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 1571 return (this->*info.irGeneratorVisitMethod)(node);
29 }
30
31 806 std::any IRGenerator::visitBuiltinPrintfCall(const FctCallNode *node) {
32 // Retrieve templated string
33
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 806 assert(node->hasArgs);
34 806 const ExprNode *firstArg = node->argLst->args.front();
35
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 806 assert(firstArg->getEvaluatedSymbolType(manIdx).is(TY_STRING) && firstArg->hasCompileTimeValue(manIdx));
36
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 806 const size_t stringOffset = firstArg->getCompileTimeValue(manIdx).stringValueOffset;
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 806 const std::string templatedString = resourceManager.compileTimeStringValues.at(stringOffset);
38
39 // Push the template string as first argument
40 806 std::vector<llvm::Value *> printfArgs;
41
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 1612 llvm::Constant *templateString = createGlobalStringConst("printf.str.", templatedString, node->codeLoc);
42
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 806 printfArgs.push_back(templateString);
43
44 // Collect replacement arguments
45
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 1472 for (size_t argIdx = 1; argIdx < node->argLst->args.size(); argIdx++) {
46
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 666 const ExprNode *arg = node->argLst->args.at(argIdx);
47 // Retrieve type of argument
48
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 666 const QualType argSymbolType = arg->getEvaluatedSymbolType(manIdx);
49
50 // Re-map some values
51 llvm::Value *argVal;
52
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 666 if (argSymbolType.isArray()) {
53 // ToDo: Check if GEP can be removed
54 ✗ llvm::Value *argValPtr = resolveAddress(arg);
55 ✗ llvm::Value *indices[2] = {builder.getInt64(0), builder.getInt32(0)};
56 ✗ llvm::Type *argType = argSymbolType.toLLVMType(sourceFile);
57 ✗ argVal = insertInBoundsGEP(argType, argValPtr, indices);
58
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 666 } else if (argSymbolType.getBase().isStringObj()) {
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 61 llvm::Value *argValPtr = resolveAddress(arg);
60
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 61 llvm::Type *argBaseType = argSymbolType.getBase().toLLVMType(sourceFile);
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 61 argValPtr = insertStructGEP(argBaseType, argValPtr, 0);
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 122 argVal = insertLoad(builder.getPtrTy(), argValPtr);
63 } else {
64
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 605 argVal = resolveValue(arg);
65 }
66
67 // Extend all integer types lower than 32 bit to 32 bit
68
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 666 if (argSymbolType.removeReferenceWrapper().isOneOf({TY_SHORT, TY_BYTE, TY_CHAR, TY_BOOL}))
69
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 102 argVal = builder.CreateIntCast(argVal, builder.getInt32Ty(), argSymbolType.removeReferenceWrapper().isSigned());
70
71
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 666 printfArgs.push_back(argVal);
72 }
73
74 // Call printf function
75
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 806 llvm::Function *printfFct = stdFunctionManager.getPrintfFct();
76
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 806 llvm::CallInst *callInst = builder.CreateCall(printfFct, printfArgs);
77
78 // Add noundef attribute to return value and all arguments
79
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 806 callInst->addRetAttr(llvm::Attribute::NoUndef);
80
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 2278 for (size_t i = 0; i < printfArgs.size(); i++)
81
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 1472 callInst->addParamAttr(i, llvm::Attribute::NoUndef);
82
83
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 1612 return LLVMExprResult{.value = callInst};
84 806 }
85
86 35 std::any IRGenerator::visitBuiltinLenCall(const FctCallNode *node) {
87
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 35 assert(node->fqFunctionName == BUILTIN_FCT_NAME_LEN);
88
89 // Check if the length is fixed and known via the symbol type
90 35 const ExprNode *argNode = node->argLst->args.front();
91
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 35 QualType symbolType = argNode->getEvaluatedSymbolType(manIdx);
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 35 symbolType = symbolType.removeReferenceWrapper();
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 35 assert(symbolType.is(TY_STRING));
94
95
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 35 llvm::Function *getRawLengthFct = stdFunctionManager.getStringGetRawLengthStringFct();
96
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 35 llvm::Value *lengthValue = builder.CreateCall(getRawLengthFct, resolveValue(argNode));
97
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 70 return LLVMExprResult{.value = lengthValue};
98 }
99
100 729 std::any IRGenerator::visitBuiltinPanicCall(const FctCallNode *node) {
101
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 729 assert(node->fqFunctionName == BUILTIN_FCT_NAME_PANIC);
102
103
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 729 llvm::PointerType *ptrTy = builder.getPtrTy();
104
105 // Get value for stderr
106 llvm::Value *stdErr;
107
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 729 if (cliOptions.targetTriple.isOSWindows()) {
108
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 11 llvm::Function *getAcrtIOFuncFct = stdFunctionManager.getAcrtIOFuncFct();
109
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 11 stdErr = builder.CreateCall(getAcrtIOFuncFct, {builder.getInt32(/*constant for stderr*/ 2)});
110 } else {
111
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 718 const char *globalName = cliOptions.targetTriple.isOSDarwin() ? "__stderrp" : "stderr";
112
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 718 module->getOrInsertGlobal(globalName, ptrTy);
113
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 718 llvm::GlobalVariable *stdErrPtr = module->getNamedGlobal(globalName);
114
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 718 stdErrPtr->setLinkage(llvm::GlobalVariable::ExternalLinkage);
115 718 stdErrPtr->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Local);
116
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 718 stdErrPtr->setAlignment(llvm::MaybeAlign(8));
117
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 1436 stdErr = insertLoad(ptrTy, stdErrPtr);
118 }
119
120 // Create constant for error message
121
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 729 const std::string codeLoc = node->codeLoc.toPrettyString();
122
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 729 const std::string templateStr = "Program panicked at " + codeLoc + ": %s\n" + node->getErrorMessage() + "\n";
123
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 1458 llvm::GlobalVariable *globalString = builder.CreateGlobalString(templateStr, getUnusedGlobalName(ANON_GLOBAL_STRING_NAME));
124
125 // If the output should be comparable, fix alignment to 4 bytes
126
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 729 if (cliOptions.comparableOutput)
127
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 729 globalString->setAlignment(llvm::Align(4));
128
129 // Get actual error message
130
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 729 assert(node->hasArgs);
131 729 const ExprNode *assignExpr = node->argLst->args.front();
132
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 729 llvm::Value *errorObjPtr = resolveAddress(assignExpr);
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 729 llvm::Type *errorObjTy = assignExpr->getEvaluatedSymbolType(manIdx).toLLVMType(sourceFile);
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 729 llvm::Value *errorMessagePtr = insertStructGEP(errorObjTy, errorObjPtr, 1);
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 729 llvm::Value *errorMessage = insertLoad(ptrTy, errorMessagePtr);
136
137 // Print the error message to stderr
138
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 729 llvm::Function *fprintfFct = stdFunctionManager.getFPrintfFct();
139
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 729 builder.CreateCall(fprintfFct, {stdErr, globalString, errorMessage});
140
141 // Cleanup the scope before calling exit()
142 // Unreachable below counts as terminator
143
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 729 terminateBlock(node->getNextOuterStmtLst());
144
145 // Generate call to exit()
146
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 729 llvm::Function *exitFct = stdFunctionManager.getExitFct();
147
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 729 builder.CreateCall(exitFct, builder.getInt32(EXIT_FAILURE));
148 // Create unreachable instruction
149
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 729 builder.CreateUnreachable();
150
151
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 1458 return nullptr;
152 729 }
153
154 1 std::any IRGenerator::visitBuiltinSyscallCall(const FctCallNode *node) {
155
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 1 assert(node->fqFunctionName == BUILTIN_FCT_NAME_SYSCALL);
156
157 // Determine the required number of operands.
158 // (We assume at least one argument is provided: the syscall number)
159
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 1 assert(node->hasArgs);
160 1 const auto requiredRegs = static_cast<uint8_t>(node->argLst->args.size());
161
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 1 assert(requiredRegs >= 1 && requiredRegs <= 6);
162
163 // Create the asm and constraint strings based on the required number of registers.
164
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 1 const std::string asmString = getSysCallAsmString(requiredRegs);
165
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 1 const std::string constraints = getSysCallConstraintString(requiredRegs);
166
167 // Create the LLVM function type for the inline asm with only the needed operands.
168
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 1 llvm::Type *int64Ty = builder.getInt64Ty();
169
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 1 const std::vector argTypes(requiredRegs, int64Ty);
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 1 llvm::FunctionType *fctType = llvm::FunctionType::get(builder.getVoidTy(), argTypes, false);
171
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 1 llvm::InlineAsm *inlineAsm = llvm::InlineAsm::get(fctType, asmString, constraints, true);
172
173 // Build the argument list (each provided argument is converted to i64).
174 1 std::vector<llvm::Value *> argValues;
175
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 1 argValues.reserve(requiredRegs);
176
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 5 for (uint8_t i = 0; i < requiredRegs; i++) {
177
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 4 const ExprNode *argNode = node->argLst->args.at(i);
178
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 4 const QualType &argType = argNode->getEvaluatedSymbolType(manIdx);
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 4 assert(argType.isOneOf({TY_INT, TY_LONG, TY_SHORT, TY_BOOL, TY_BYTE, TY_PTR, TY_STRING}));
180
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 4 if (argType.isOneOf({TY_PTR, TY_STRING}))
181
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 1 argValues.push_back(builder.CreatePtrToInt(resolveValue(argNode), builder.getInt64Ty()));
182 else
183
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 3 argValues.push_back(builder.CreateZExt(resolveValue(argNode), builder.getInt64Ty()));
184 }
185
186 // Generate the call using only the required number of arguments.
187
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 1 llvm::Value *result = builder.CreateCall(inlineAsm, argValues);
188
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 2 return LLVMExprResult{.value = result};
190 1 }
191
192 } // namespace spice::compiler
193