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++ // Copyright (C) 2022 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
++ // Qt-Security score:significant
++
++ #ifndef QQMLJSBASICBLOCKS_P_H
++ #define QQMLJSBASICBLOCKS_P_H
++
++ //
++ // W A R N I N G
++ // -------------
++ //
++ // This file is not part of the Qt API. It exists purely as an
++ // implementation detail. This header file may change from version to
++ // version without notice, or even be removed.
++ //
++ // We mean it.
++
++
++ #include <private/qflatmap_p.h>
++ #include <private/qqmljscompilepass_p.h>
++ #include <private/qqmljscompiler_p.h>
++
++ QT_BEGIN_NAMESPACE
++
++ class Q_QMLCOMPILER_EXPORT QQmlJSBasicBlocks : public QQmlJSCompilePass
++ {
++ public:
++ QQmlJSBasicBlocks(const QV4::Compiler::Context *context,
++ const QV4::Compiler::JSUnitGenerator *unitGenerator,
++ const QQmlJSTypeResolver *typeResolver, QQmlJSLogger *logger)
++ : QQmlJSCompilePass(unitGenerator, typeResolver, logger), m_context{ context }
++ {
++ }
++
++ ~QQmlJSBasicBlocks() = default;
++
++ QQmlJSCompilePass::BlocksAndAnnotations run(const Function *function,
++ QQmlJSAotCompiler::Flags compileFlags,
++ bool &basicBlocksValidationFailed);
++
++ struct BasicBlocksValidationResult { bool success = true; QString errorMessage; };
++ BasicBlocksValidationResult basicBlocksValidation();
++
++ static BasicBlocks::iterator basicBlockForInstruction(BasicBlocks &blocks, int offset)
++ {
++ return findBasicBlockForInstruction(blocks, offset);
++ }
++ static BasicBlocks::const_iterator constBasicBlockForInstruction(const BasicBlocks &blocks,
++ int offset)
++ {
++ return findBasicBlockForInstruction(blocks, offset);
++ }
++
++ QList<ObjectOrArrayDefinition> objectAndArrayDefinitions() const;
++
++ private:
++ QV4::Moth::ByteCodeHandler::Verdict startInstruction(QV4::Moth::Instr::Type type) override;
++ void endInstruction(QV4::Moth::Instr::Type type) override;
++
++ void generate_Jump(int offset) override;
++ void generate_JumpTrue(int offset) override;
++ void generate_JumpFalse(int offset) override;
++ void generate_JumpNoException(int offset) override;
++ void generate_JumpNotUndefined(int offset) override;
++ void generate_IteratorNext(int value, int offset) override;
++ void generate_GetOptionalLookup(int index, int offset) override;
++
++ void generate_Ret() override;
++ void generate_ThrowException() override;
++
++ void generate_DefineArray(int argc, int argv) override;
++ void generate_DefineObjectLiteral(int internalClassId, int argc, int args) override;
++ void generate_Construct(int func, int argc, int argv) override;
++
++ enum JumpMode { Unconditional, Conditional };
++ void processJump(int offset, JumpMode mode);
++
++ void dumpBasicBlocks();
++ void dumpDOTGraph();
++
++ template <typename Container, typename Iterator = decltype(Container().lower_bound(1))>
++ static Iterator findBasicBlockForInstruction(Container &container, int instructionOffset)
++ {
++ auto block = container.lower_bound(instructionOffset);
++ if (block == container.end() || block->first != instructionOffset)
++ --block;
++ return block;
++ }
++
++ const QV4::Compiler::Context *m_context;
++ QList<ObjectOrArrayDefinition> m_objectAndArrayDefinitions;
++ bool m_skipUntilNextLabel = false;
++ bool m_hadBackJumps = false;
++ };
++
++ QT_END_NAMESPACE
++
++ #endif // QQMLJSBASICBLOCKS_P_H