GCC Code Coverage Report

Directory: ../
Coverage: low: ≥ 0% medium: ≥ 75.0% high: ≥ 90.0%
Coverage Exec / Excl / Total
Lines: 97.0% 162 / 0 / 167
Functions: 100.0% 10 / 0 / 10
Branches: 53.3% 229 / 0 / 430
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 15238 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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 15238 if (node->hasCompileTimeValue(manIdx)) {
20
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 3068 llvm::Constant *value = getConst(node->getCompileTimeValue(manIdx), node->getEvaluatedSymbolType(manIdx), node);
21
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 6136 return LLVMExprResult{.constant = value};
22 }
23
24 // If we need to perform runtime actions, call the specified IRGenerator delegate
25
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 12170 assert(BUILTIN_DISPATCH_MAP.contains(node->fqFunctionName) && "Builtin function not implemented!");
26
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 12170 const BuiltinFunctionDispatch &dispatch = BUILTIN_DISPATCH_MAP.find(node->fqFunctionName)->second;
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 12170 assert(dispatch.irGeneratorVisitMethod != nullptr);
28
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 12170 return (this->*dispatch.irGeneratorVisitMethod)(node);
29 }
30
31 2559 std::any IRGenerator::visitBuiltinPrintfCall(const FctCallNode *node) {
32 // Retrieve templated string
33
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 2559 assert(node->hasArgs);
34 2559 const ExprNode *firstArg = node->argLst->args.front();
35
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 2559 assert(firstArg->getEvaluatedSymbolType(manIdx).is(TY_STRING) && firstArg->hasCompileTimeValue(manIdx));
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 2559 const size_t stringOffset = firstArg->getCompileTimeValue(manIdx).stringValueOffset;
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 2559 const std::string templatedString = resourceManager.compileTimeStringValues.at(stringOffset);
38
39 // Push the template string as first argument
40 2559 std::vector<llvm::Value *> printfArgs;
41
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 5118 llvm::Constant *templateString = createGlobalStringConst("printf.str.", templatedString, node->codeLoc);
42
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 2559 printfArgs.push_back(templateString);
43
44 // Collect replacement arguments
45
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 4593 for (size_t argIdx = 1; argIdx < node->argLst->args.size(); argIdx++) {
46
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 2034 const ExprNode *arg = node->argLst->args.at(argIdx);
47 // Retrieve type of argument
48
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 2034 const QualType argSymbolType = arg->getEvaluatedSymbolType(manIdx);
49
50 // Re-map some values
51 llvm::Value *argVal;
52
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 2034 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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 2034 } else if (argSymbolType.getBase().isStringObj()) {
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 176 llvm::Value *argValPtr = resolveAddress(arg);
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 176 llvm::Type *argBaseType = argSymbolType.getBase().toLLVMType(sourceFile);
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 176 argValPtr = insertStructGEP(argBaseType, argValPtr, 0);
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 176 argVal = insertLoad(builder.getPtrTy(), argValPtr);
63 } else {
64
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 1858 argVal = resolveValue(arg);
65 }
66
67 // Extend all integer types lower than 32 bit to 32 bit
68
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 2034 if (argSymbolType.removeReferenceWrapper().isOneOf({TY_SHORT, TY_BYTE, TY_CHAR, TY_BOOL}))
69
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 360 argVal = builder.CreateIntCast(argVal, builder.getInt32Ty(), argSymbolType.removeReferenceWrapper().isSigned());
70
71
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 2034 printfArgs.push_back(argVal);
72 }
73
74 // Call printf function
75
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 2559 llvm::Function *printfFct = stdFunctionManager.getPrintfFct();
76
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 2559 llvm::CallInst *callInst = builder.CreateCall(printfFct, printfArgs);
77
78 // Add noundef attribute to return value and all arguments
79
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 2559 callInst->addRetAttr(llvm::Attribute::NoUndef);
80
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 7152 for (size_t i = 0; i < printfArgs.size(); i++)
81
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 4593 callInst->addParamAttr(i, llvm::Attribute::NoUndef);
82
83
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 5118 return LLVMExprResult{.value = callInst};
84 2559 }
85
86 156 std::any IRGenerator::visitBuiltinLenCall(const FctCallNode *node) {
87
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 156 assert(node->fqFunctionName == BUILTIN_FCT_NAME_LEN);
88
89 // Check if the length is fixed and known via the symbol type
90 156 const ExprNode *argNode = node->argLst->args.front();
91
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 156 QualType symbolType = argNode->getEvaluatedSymbolType(manIdx);
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 156 symbolType = symbolType.removeReferenceWrapper();
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 156 assert(symbolType.is(TY_STRING));
94
95
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 156 llvm::Function *getRawLengthFct = stdFunctionManager.getStringGetRawLengthStringFct();
96
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 156 llvm::Value *lengthValue = builder.CreateCall(getRawLengthFct, resolveValue(argNode));
97
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 312 return LLVMExprResult{.value = lengthValue};
98 }
99
100 4979 std::any IRGenerator::visitBuiltinPanicCall(const FctCallNode *node) {
101
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 4979 assert(node->fqFunctionName == BUILTIN_FCT_NAME_PANIC);
102
103
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 4979 llvm::PointerType *ptrTy = builder.getPtrTy();
104
105 // Get value for stderr
106
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 4979 llvm::Value *stdErr = getStdErrValue();
107
108 // Create constant for error message
109
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 4979 const std::string codeLoc = node->codeLoc.toPrettyString();
110
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 4979 const std::string templateStr = "Program panicked at " + codeLoc + ": %s\n" + node->getErrorMessage() + "\n";
111
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 9958 llvm::GlobalVariable *globalString = builder.CreateGlobalString(templateStr, getUnusedGlobalName(ANON_GLOBAL_STRING_NAME));
112
113 // If the output should be comparable, fix alignment to 4 bytes
114
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 4979 if (cliOptions.comparableOutput)
115
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 4979 globalString->setAlignment(llvm::Align(4));
116
117 // Get actual error message
118
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 4979 assert(node->hasArgs);
119 4979 const ExprNode *assignExpr = node->argLst->args.front();
120
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 4979 llvm::Value *errorObjPtr = resolveAddress(assignExpr);
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 4979 llvm::Type *errorObjTy = assignExpr->getEvaluatedSymbolType(manIdx).toLLVMType(sourceFile);
122
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 4979 llvm::Value *errorMessagePtr = insertStructGEP(errorObjTy, errorObjPtr, 1);
123
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 4979 llvm::Value *errorMessage = insertLoad(ptrTy, errorMessagePtr);
124
125 // Print the error message to stderr
126
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 4979 llvm::Function *fprintfFct = stdFunctionManager.getFPrintfFct();
127
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 4979 builder.CreateCall(fprintfFct, {stdErr, globalString, errorMessage});
128
129 // Print the recorded error return trace to stderr. A no-op unless error return tracing was enabled somewhere
130 // along the propagation chain that produced this error - see error_trace_rt.spice.
131
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 4979 builder.CreateCall(stdFunctionManager.getErrTraceDumpFct());
132
133 // Cleanup the scope before calling exit()
134 // Unreachable below counts as terminator
135
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 4979 terminateBlock(node->getNextOuterStmtLst());
136
137 // Generate call to exit()
138
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 4979 llvm::Function *exitFct = stdFunctionManager.getExitFct();
139
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 4979 builder.CreateCall(exitFct, builder.getInt32(EXIT_FAILURE));
140 // Create unreachable instruction
141
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 4979 builder.CreateUnreachable();
142
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 9958 return nullptr;
144 4979 }
145
146 4 std::any IRGenerator::visitBuiltinSyscallCall(const FctCallNode *node) {
147
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 4 assert(node->fqFunctionName == BUILTIN_FCT_NAME_SYSCALL);
148
149 // Determine the required number of operands.
150 // (We assume at least one argument is provided: the syscall number)
151
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 4 assert(node->hasArgs);
152 4 const auto requiredRegs = static_cast<uint8_t>(node->argLst->args.size());
153
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 4 assert(requiredRegs >= 1 && requiredRegs <= 6);
154
155 // Create the asm and constraint strings based on the required number of registers.
156
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 4 const std::string asmString = getSysCallAsmString(requiredRegs);
157
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 4 const std::string constraints = getSysCallConstraintString(requiredRegs);
158
159 // Create the LLVM function type for the inline asm with only the needed operands.
160
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 4 llvm::Type *int64Ty = builder.getInt64Ty();
161
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 8 const std::vector argTypes(requiredRegs, int64Ty);
162
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 4 llvm::FunctionType *fctType = llvm::FunctionType::get(builder.getVoidTy(), argTypes, false);
163
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 4 llvm::InlineAsm *inlineAsm = llvm::InlineAsm::get(fctType, asmString, constraints, true);
164
165 // Build the argument list (each provided argument is converted to i64).
166 4 std::vector<llvm::Value *> argValues;
167
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 4 argValues.reserve(requiredRegs);
168
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 20 for (uint8_t i = 0; i < requiredRegs; i++) {
169
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 16 const ExprNode *argNode = node->argLst->args.at(i);
170
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 16 const QualType &argType = argNode->getEvaluatedSymbolType(manIdx);
171
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 16 assert(argType.isOneOf({TY_INT, TY_LONG, TY_SHORT, TY_BOOL, TY_BYTE, TY_PTR, TY_STRING}));
172
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 16 if (argType.isOneOf({TY_PTR, TY_STRING}))
173
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 4 argValues.push_back(builder.CreatePtrToInt(resolveValue(argNode), builder.getInt64Ty()));
174 else
175
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 12 argValues.push_back(builder.CreateZExt(resolveValue(argNode), builder.getInt64Ty()));
176 }
177
178 // Generate the call using only the required number of arguments.
179
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 4 llvm::Value *result = builder.CreateCall(inlineAsm, argValues);
180
181
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 8 return LLVMExprResult{.value = result};
182 4 }
183
184 483 std::any IRGenerator::visitBuiltinNewCall(const FctCallNode *node) {
185
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 483 assert(node->fqFunctionName == BUILTIN_FCT_NAME_NEW);
186
187 483 const FctCallNode::FctCallData &data = node->data.at(manIdx);
188 483 const QualType &templateType = data.templateTypes.front();
189
190 // Allocate sizeof(T) bytes on the heap
191 483 llvm::Type *llvmType = templateType.toLLVMType(sourceFile);
192
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 483 const uint64_t typeSize = module->getDataLayout().getTypeAllocSize(llvmType);
193 483 llvm::Function *allocFct = stdFunctionManager.getAllocUnsafeLongFct();
194
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 483 llvm::Value *targetPtr = builder.CreateCall(allocFct, {builder.getInt64(typeSize)});
195
196 // Call the constructor if one was resolved during type checking
197
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 483 if (const Function *ctor = data.callee) {
198 472 std::vector<llvm::Value *> ctorArgValues;
199
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 472 if (node->hasArgs) {
200
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 444 const QualTypeList paramTypes = ctor->getParamTypes();
201
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 980 for (size_t i = 0; i < node->argLst->args.size(); i++) {
202
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 536 const ExprNode *argNode = node->argLst->args.at(i);
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 536 if (paramTypes.at(i).isRef())
204
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 135 ctorArgValues.push_back(resolveAddress(argNode));
205 else
206
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 401 ctorArgValues.push_back(resolveValue(argNode));
207 }
208 444 }
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 472 generateCtorOrDtorCall(targetPtr, ctor, ctorArgValues);
210 472 } else {
211 11 const std::vector<ExprNode *> &args = node->argLst->args;
212
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 11 llvm::Value *initVal = node->hasArgs ? resolveValue(args.front()) : getDefaultValueForSymbolType(templateType);
213 11 insertStore(initVal, targetPtr);
214 }
215
216
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 966 return LLVMExprResult{.value = targetPtr};
217 }
218
219 1403 std::any IRGenerator::visitBuiltinPlacementNewCall(const FctCallNode *node) {
220
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 1403 assert(node->fqFunctionName == BUILTIN_FCT_NAME_PLACEMENT_NEW);
221
222 1403 const FctCallNode::FctCallData &data = node->data.at(manIdx);
223
224 // Resolve the target address from the first argument (the byte* pointer)
225 1403 llvm::Value *targetPtr = resolveValue(node->argLst->args.front());
226
227 // Call the constructor if one was resolved during type checking
228
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 1403 if (const Function *ctor = data.callee) {
229 883 std::vector<llvm::Value *> ctorArgValues;
230
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 883 const QualTypeList paramTypes = ctor->getParamTypes();
231
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 1776 for (size_t i = 1; i < node->argLst->args.size(); i++) {
232
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 893 const ExprNode *argNode = node->argLst->args.at(i);
233
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 893 if (paramTypes.at(i - 1).isRef())
234
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 573 ctorArgValues.push_back(resolveAddress(argNode));
235 else
236
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 320 ctorArgValues.push_back(resolveValue(argNode));
237 }
238
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 883 generateCtorOrDtorCall(targetPtr, ctor, ctorArgValues);
239 883 } else {
240 520 const QualType &templateType = data.templateTypes.front();
241 520 const std::vector<ExprNode *> &args = node->argLst->args;
242
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 520 llvm::Value *initVal = args.size() > 1 ? resolveValue(args.at(1)) : getDefaultValueForSymbolType(templateType);
243 520 insertStore(initVal, targetPtr);
244 }
245
246
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 2806 return LLVMExprResult{.value = targetPtr};
247 }
248
249 1293 std::any IRGenerator::visitBuiltinErrTraceBufferCall(const FctCallNode *node) {
250
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 1293 assert(node->fqFunctionName == BUILTIN_FCT_NAME_ERR_TRACE_BUFFER);
251
252 // Get or create the thread-local ErrorTraceBuffer instance for this module. It is only ever referenced from
253 // within error_trace_rt.spice's own wrapper procedures (all compiled into this same module), so internal
254 // linkage is enough - no other module ever needs to see this symbol.
255 1293 constexpr auto TLS_GLOBAL_NAME = "__spice_errTraceBufferTLS";
256
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 1293 llvm::GlobalVariable *tlsBuffer = module->getNamedGlobal(TLS_GLOBAL_NAME);
257
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 1293 if (!tlsBuffer) {
258
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 431 llvm::Type *bufferType = node->getEvaluatedSymbolType(manIdx).removeReferenceWrapper().toLLVMType(sourceFile);
259 431 llvm::Constant *zeroInit = llvm::Constant::getNullValue(bufferType);
260 ✗ tlsBuffer = new llvm::GlobalVariable(*module, bufferType, /*isConstant=*/false, llvm::GlobalValue::InternalLinkage, zeroInit,
261
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 431 TLS_GLOBAL_NAME);
262 431 tlsBuffer->setThreadLocal(true);
263 }
264
265
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 2586 return LLVMExprResult{.ptr = tlsBuffer};
266 }
267
268 1293 std::any IRGenerator::visitBuiltinStdErrCall([[maybe_unused]] const FctCallNode *node) {
269
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 1293 assert(node->fqFunctionName == BUILTIN_FCT_NAME_STDERR);
270
271
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 2586 return LLVMExprResult{.value = getStdErrValue()};
272 }
273
274 /**
275 * Retrieves the process's stderr stream (FILE*). Spice has no syntax for declaring an external variable, so this
276 * reaches the real libc symbol directly, the same way on every platform: an ACRT accessor call on Windows, and
277 * the platform-specific extern global everywhere else.
278 */
279 6302 llvm::Value *IRGenerator::getStdErrValue() const {
280 6302 llvm::PointerType *ptrTy = builder.getPtrTy();
281
282
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 6302 if (cliOptions.targetTriple.isOSWindows()) {
283 26 llvm::Function *getAcrtIOFuncFct = stdFunctionManager.getAcrtIOFuncFct();
284
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 26 return builder.CreateCall(getAcrtIOFuncFct, {builder.getInt32(/*constant for stderr*/ 2)});
285 }
286
287
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 6276 const char *globalName = cliOptions.targetTriple.isOSDarwin() ? "__stderrp" : "stderr";
288
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 6276 llvm::GlobalVariable *stdErrPtr = module->getNamedGlobal(globalName);
289
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 6276 if (!stdErrPtr) {
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 2115 stdErrPtr = llvm::cast<llvm::GlobalVariable>(module->getOrInsertGlobal(globalName, ptrTy));
291 2115 stdErrPtr->setLinkage(llvm::GlobalVariable::ExternalLinkage);
292 2115 stdErrPtr->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Local);
293
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 2115 stdErrPtr->setAlignment(llvm::MaybeAlign(8));
294 }
295
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 6276 return insertLoad(ptrTy, stdErrPtr);
296 }
297
298 } // namespace spice::compiler
299