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|---|---|---|---|
| 1 | // Copyright (c) 2021-2025 ChilliBits. All rights reserved. | ||
| 2 | |||
| 3 | #include "IRGenerator.h" | ||
| 4 | |||
| 5 | #include <llvm/IR/Module.h> | ||
| 6 | |||
| 7 | #include <ast/ASTNodes.h> | ||
| 8 | #include <driver/Driver.h> | ||
| 9 | #include <symboltablebuilder/SymbolTableBuilder.h> | ||
| 10 | |||
| 11 | namespace spice::compiler { | ||
| 12 | |||
| 13 | 18018 | std::any IRGenerator::visitStmtLst(const StmtLstNode *node) { | |
| 14 | // Generate instructions in the scope | ||
| 15 |
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52346 | for (const StmtNode *stmt : node->statements) { |
| 16 |
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34334 | if (!stmt) |
| 17 | ✗ | continue; | |
| 18 | // Check if we can cancel generating instructions for this code branch | ||
| 19 |
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34334 | if (blockAlreadyTerminated || stmt->unreachable) |
| 20 | break; | ||
| 21 | // Visit child | ||
| 22 |
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34328 | visit(stmt); |
| 23 | } | ||
| 24 | |||
| 25 | // Generate cleanup code of this scope, e.g. dtor calls for struct instances | ||
| 26 | 18018 | diGenerator.setSourceLocation(node->getNextOuterStmtLst()->closingBraceCodeLoc); | |
| 27 | 18018 | generateScopeCleanup(node); | |
| 28 | |||
| 29 |
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18018 | return nullptr; |
| 30 | } | ||
| 31 | |||
| 32 | ✗ | std::any IRGenerator::visitTypeAltsLst(const TypeAltsLstNode *node) { | |
| 33 | ✗ | return nullptr; // Noop | |
| 34 | } | ||
| 35 | |||
| 36 | 7440 | std::any IRGenerator::visitDeclStmt(const DeclStmtNode *node) { | |
| 37 |
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7440 | diGenerator.setSourceLocation(node); |
| 38 | |||
| 39 | // Get variable entry | ||
| 40 |
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7440 | SymbolTableEntry *varEntry = node->entries.at(manIdx); |
| 41 |
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7440 | assert(varEntry != nullptr); |
| 42 |
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7440 | const QualType varSymbolType = varEntry->getQualType(); |
| 43 | |||
| 44 | // Get LLVM type of variable | ||
| 45 |
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7440 | llvm::Type *varTy = varSymbolType.toLLVMType(sourceFile); |
| 46 | |||
| 47 | // Check if the declaration is with an assignment or the default value | ||
| 48 | 7440 | llvm::Value *varAddress = nullptr; | |
| 49 |
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7440 | if (node->hasAssignment) { // Assignment |
| 50 |
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7102 | if (node->calledCopyCtor) { |
| 51 | // Allocate memory | ||
| 52 |
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9 | varAddress = insertAlloca(varTy); |
| 53 |
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9 | varEntry->updateAddress(varAddress); |
| 54 | // Call copy ctor | ||
| 55 |
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9 | llvm::Value *rhsAddress = resolveAddress(node->assignExpr); |
| 56 |
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9 | assert(rhsAddress != nullptr); |
| 57 |
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27 | generateCtorOrDtorCall(varEntry, node->calledCopyCtor, {rhsAddress}); |
| 58 | } else { | ||
| 59 | // Assign rhs to lhs | ||
| 60 |
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7093 | [[maybe_unused]] const LLVMExprResult assignResult = doAssignment(varAddress, varEntry, node->assignExpr, node, true); |
| 61 |
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7093 | assert(assignResult.entry == varEntry); |
| 62 |
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7093 | varAddress = varEntry->getAddress(); |
| 63 |
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7093 | varEntry->updateAddress(varAddress); |
| 64 | } | ||
| 65 | } else { // Default value | ||
| 66 | // Allocate memory | ||
| 67 |
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338 | varAddress = insertAlloca(varTy); |
| 68 |
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338 | varEntry->updateAddress(varAddress); |
| 69 | |||
| 70 |
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338 | if (node->calledInitCtor) { |
| 71 | // Call no-args constructor | ||
| 72 |
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145 | generateCtorOrDtorCall(varEntry, node->calledInitCtor, {}); |
| 73 |
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193 | } else if (!node->isForEachItem && cliOptions.buildMode != RELEASE) { |
| 74 |
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83 | assert(!node->isCtorCallRequired); |
| 75 |
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83 | assert(cliOptions.buildMode == DEBUG || cliOptions.buildMode == TEST); |
| 76 | // Retrieve default value for lhs symbol type and store it | ||
| 77 |
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83 | llvm::Constant *defaultValue = getDefaultValueForSymbolType(varSymbolType); |
| 78 |
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83 | insertStore(defaultValue, varAddress); |
| 79 | } | ||
| 80 | } | ||
| 81 |
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7440 | assert(varAddress != nullptr); |
| 82 | |||
| 83 | // Attach the variable name to the LLVM value. | ||
| 84 |
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7440 | varAddress->setName(varEntry->name); |
| 85 | |||
| 86 | // Generate debug info for variable declaration | ||
| 87 |
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7440 | diGenerator.setSourceLocation(node); |
| 88 |
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7440 | diGenerator.generateLocalVarDebugInfo(node->varName, varAddress); |
| 89 | |||
| 90 |
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7440 | return nullptr; |
| 91 | } | ||
| 92 | |||
| 93 | ✗ | std::any IRGenerator::visitQualifierLst(const QualifierLstNode *node) { | |
| 94 | ✗ | return nullptr; // Noop | |
| 95 | } | ||
| 96 | |||
| 97 | 296 | std::any IRGenerator::visitModAttr(const ModAttrNode *node) { | |
| 98 |
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296 | return nullptr; // Noop |
| 99 | } | ||
| 100 | |||
| 101 | ✗ | std::any IRGenerator::visitTopLevelDefinitionAttr(const TopLevelDefinitionAttrNode *node) { | |
| 102 | ✗ | return nullptr; // Noop | |
| 103 | } | ||
| 104 | |||
| 105 | 66 | std::any IRGenerator::visitCaseConstant(const CaseConstantNode *node) { | |
| 106 |
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66 | if (node->constant) |
| 107 | 15 | return visit(node->constant); | |
| 108 | |||
| 109 | 51 | const SymbolTableEntry *constantEntry = node->entry; | |
| 110 |
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51 | return getConst(constantEntry->declNode->getCompileTimeValue(), node->getEvaluatedSymbolType(manIdx), node); |
| 111 | } | ||
| 112 | |||
| 113 | 8834 | std::any IRGenerator::visitReturnStmt(const ReturnStmtNode *node) { | |
| 114 | 8834 | diGenerator.setSourceLocation(node); | |
| 115 | |||
| 116 | 8834 | llvm::Value *returnValue = nullptr; | |
| 117 |
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8834 | if (node->hasReturnValue) { // Return value is attached to the return statement |
| 118 | 8769 | const AssignExprNode *returnExpr = node->assignExpr; | |
| 119 |
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8769 | if (node->calledCopyCtor) { |
| 120 | // Perform a copy | ||
| 121 | 3 | llvm::Value *originalAddress = resolveAddress(returnExpr); | |
| 122 | 3 | llvm::Type *returnTy = node->returnType.toLLVMType(sourceFile); | |
| 123 |
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3 | llvm::Value *newAddress = insertAlloca(returnTy); |
| 124 |
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9 | generateCtorOrDtorCall(newAddress, node->calledCopyCtor, {originalAddress}); |
| 125 |
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6 | returnValue = insertLoad(returnTy, newAddress); |
| 126 | } else { | ||
| 127 |
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8766 | returnValue = node->returnType.isRef() ? resolveAddress(returnExpr) : resolveValue(returnExpr); |
| 128 | } | ||
| 129 | } else { // Try to load result variable value | ||
| 130 |
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195 | const SymbolTableEntry *resultEntry = currentScope->lookup(RETURN_VARIABLE_NAME); |
| 131 |
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65 | if (resultEntry != nullptr) { |
| 132 | 4 | llvm::Type *resultSTy = resultEntry->getQualType().toLLVMType(sourceFile); | |
| 133 | 4 | llvm::Value *returnValueAddr = resultEntry->getAddress(); | |
| 134 |
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8 | returnValue = insertLoad(resultSTy, returnValueAddr); |
| 135 | } | ||
| 136 | } | ||
| 137 | |||
| 138 | // Terminate the block (with scope cleanup) | ||
| 139 | 8834 | terminateBlock(node->getParentScopeNode()); | |
| 140 | |||
| 141 | // Create return instruction | ||
| 142 |
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8834 | if (returnValue != nullptr) { |
| 143 | // Return with value | ||
| 144 | 8773 | builder.CreateRet(returnValue); | |
| 145 | } else { | ||
| 146 | // Return without value | ||
| 147 | 61 | builder.CreateRetVoid(); | |
| 148 | } | ||
| 149 | |||
| 150 |
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8834 | return nullptr; |
| 151 | } | ||
| 152 | |||
| 153 | 102 | std::any IRGenerator::visitBreakStmt(const BreakStmtNode *node) { | |
| 154 | 102 | diGenerator.setSourceLocation(node); | |
| 155 | |||
| 156 | // Jump to destination block | ||
| 157 | 102 | const size_t blockIdx = breakBlocks.size() - node->breakTimes; | |
| 158 | 102 | insertJump(breakBlocks.at(blockIdx)); | |
| 159 | |||
| 160 |
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102 | return nullptr; |
| 161 | } | ||
| 162 | |||
| 163 | 341 | std::any IRGenerator::visitContinueStmt(const ContinueStmtNode *node) { | |
| 164 | 341 | diGenerator.setSourceLocation(node); | |
| 165 | |||
| 166 | // Jump to destination block | ||
| 167 | 341 | const size_t blockIdx = continueBlocks.size() - node->continueTimes; | |
| 168 | 341 | insertJump(continueBlocks.at(blockIdx)); | |
| 169 | |||
| 170 |
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341 | return nullptr; |
| 171 | } | ||
| 172 | |||
| 173 | 4 | std::any IRGenerator::visitFallthroughStmt(const FallthroughStmtNode *node) { | |
| 174 | 4 | diGenerator.setSourceLocation(node); | |
| 175 | |||
| 176 | // Jump to destination block | ||
| 177 | 4 | insertJump(fallthroughBlocks.top()); | |
| 178 | |||
| 179 |
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4 | return nullptr; |
| 180 | } | ||
| 181 | |||
| 182 | 761 | std::any IRGenerator::visitAssertStmt(const AssertStmtNode *node) { | |
| 183 | // Do not generate assertions in release mode | ||
| 184 |
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761 | if (cliOptions.buildMode == RELEASE) |
| 185 | ✗ | return nullptr; | |
| 186 | |||
| 187 |
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761 | diGenerator.setSourceLocation(node); |
| 188 | |||
| 189 | // Create blocks | ||
| 190 |
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761 | const std::string &codeLine = node->codeLoc.toPrettyLine(); |
| 191 |
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761 | llvm::BasicBlock *bThen = createBlock("assert.then." + codeLine); |
| 192 |
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761 | llvm::BasicBlock *bExit = createBlock("assert.exit." + codeLine); |
| 193 | |||
| 194 | // Visit the assignExpr | ||
| 195 |
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761 | llvm::Value *condValue = resolveValue(node->assignExpr); |
| 196 | |||
| 197 | // Create condition check | ||
| 198 |
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761 | insertCondJump(condValue, bExit, bThen, LIKELY); |
| 199 | |||
| 200 | // Switch to then block | ||
| 201 |
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761 | switchToBlock(bThen); |
| 202 | // Create constant for error message | ||
| 203 |
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761 | const std::string errorMsg = "Assertion failed: Condition '" + node->expressionString + "' evaluated to false.\n"; |
| 204 |
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1522 | llvm::GlobalVariable *globalString = builder.CreateGlobalString(errorMsg, getUnusedGlobalName(ANON_GLOBAL_STRING_NAME)); |
| 205 | // If the output should be comparable, fix alignment to 4 bytes | ||
| 206 |
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761 | if (cliOptions.comparableOutput) |
| 207 |
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761 | globalString->setAlignment(llvm::Align(4)); |
| 208 | // Print the error message | ||
| 209 |
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761 | llvm::Function *printfFct = stdFunctionManager.getPrintfFct(); |
| 210 |
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761 | builder.CreateCall(printfFct, globalString); |
| 211 | // Generate call to exit() | ||
| 212 |
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761 | llvm::Function *exitFct = stdFunctionManager.getExitFct(); |
| 213 |
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761 | builder.CreateCall(exitFct, builder.getInt32(EXIT_FAILURE)); |
| 214 | // Create unreachable instruction | ||
| 215 |
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761 | builder.CreateUnreachable(); |
| 216 | |||
| 217 | // Switch to exit block | ||
| 218 |
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761 | switchToBlock(bExit); |
| 219 | |||
| 220 |
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761 | return nullptr; |
| 221 | 761 | } | |
| 222 | |||
| 223 | } // namespace spice::compiler | ||
| 224 |