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Rework the core of class parsing/runtime semantic (#3598)

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Changes:
 - Use the pre-scanner to provide information for the parser about the existence of the class constructor
 - The allocation of the super declarative environment is no longer needed
 - The VM frame context holds the information about the this binding status
 - Reduce the number of class related VM/CBC instructions
 - Improve ecma_op_function_{construct, call} to properly set new.target

JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu
This commit is contained in:
Robert Fancsik
2020-03-16 14:37:47 +01:00
committed by GitHub
parent 56b9f098ab
commit bfd2639634
49 changed files with 1671 additions and 1490 deletions
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jerry-core/vm/vm.h
+18 -24
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@@ -240,19 +240,16 @@ typedef enum
VM_OC_FOR_OF_GET_NEXT, /**< get next */
VM_OC_FOR_OF_HAS_NEXT, /**< has next */
VM_OC_CLASS_HERITAGE, /**< create a super class context */
VM_OC_CLASS_INHERITANCE, /**< inherit properties from the 'super' class */
VM_OC_PUSH_CLASS_CONSTRUCTOR_AND_PROTOTYPE, /**< push class constructor */
VM_OC_SET_CLASS_CONSTRUCTOR, /**< set class constructor to the given function literal */
VM_OC_PUSH_IMPL_CONSTRUCTOR, /**< create implicit class constructor */
VM_OC_CLASS_EXPR_CONTEXT_END, /**< class expression heritage context end */
VM_OC_CLASS_EVAL, /**< eval inside a class */
VM_OC_LOCAL_EVAL, /**< eval in local context */
VM_OC_SUPER_CALL, /**< call the 'super' constructor */
VM_OC_SUPER_PROP_REFERENCE, /**< resolve super property reference */
VM_OC_PUSH_SUPER, /**< push resolvable super reference */
VM_OC_PUSH_CONSTRUCTOR_SUPER, /**< push 'super' inside a class constructor */
VM_OC_PUSH_CONSTRUCTOR_THIS, /**< push 'this' inside a class constructor */
VM_OC_CONSTRUCTOR_RET, /**< explicit return from a class constructor */
VM_OC_PUSH_CLASS_ENVIRONMENT, /**< push class environment */
VM_OC_PUSH_IMPLICIT_CTOR, /**< create implicit class constructor */
VM_OC_INIT_CLASS, /**< initialize class */
VM_OC_FINALIZE_CLASS, /**< finalize class */
VM_OC_PUSH_SUPER_CONSTRUCTOR, /**< getSuperConstructor operation */
VM_OC_RESOLVE_LEXICAL_THIS, /**< resolve this_binding from from the lexical environment */
VM_OC_SUPER_REFERENCE, /**< push super reference */
VM_OC_PUSH_SPREAD_ELEMENT, /**< push spread element */
VM_OC_GET_ITERATOR, /**< GetIterator abstract operation */
VM_OC_ITERATOR_STEP, /**< IteratorStep abstract operation */
@@ -300,19 +297,16 @@ typedef enum
VM_OC_FOR_OF_GET_NEXT = VM_OC_NONE, /**< get next */
VM_OC_FOR_OF_HAS_NEXT = VM_OC_NONE, /**< has next */
VM_OC_CLASS_HERITAGE = VM_OC_NONE, /**< create a super class context */
VM_OC_CLASS_INHERITANCE = VM_OC_NONE, /**< inherit properties from the 'super' class */
VM_OC_PUSH_CLASS_CONSTRUCTOR_AND_PROTOTYPE = VM_OC_NONE, /**< push class constructor */
VM_OC_SET_CLASS_CONSTRUCTOR = VM_OC_NONE, /**< set class constructor to the given function literal */
VM_OC_PUSH_IMPL_CONSTRUCTOR = VM_OC_NONE, /**< create implicit class constructor */
VM_OC_CLASS_EXPR_CONTEXT_END = VM_OC_NONE, /**< class expression heritage context end */
VM_OC_CLASS_EVAL = VM_OC_NONE, /**< eval inside a class */
VM_OC_LOCAL_EVAL = VM_OC_NONE, /**< eval in local context */
VM_OC_SUPER_CALL = VM_OC_NONE, /**< call the 'super' constructor */
VM_OC_SUPER_PROP_REFERENCE = VM_OC_NONE, /**< resolve super property reference */
VM_OC_PUSH_SUPER = VM_OC_NONE, /**< push resolvable super reference */
VM_OC_PUSH_CONSTRUCTOR_SUPER = VM_OC_NONE, /**< push 'super' inside a class constructor */
VM_OC_PUSH_CONSTRUCTOR_THIS = VM_OC_NONE, /**< push 'this' inside a class constructor */
VM_OC_CONSTRUCTOR_RET = VM_OC_NONE, /**< explicit return from a class constructor */
VM_OC_PUSH_CLASS_ENVIRONMENT = VM_OC_NONE, /**< push class environment */
VM_OC_PUSH_IMPLICIT_CTOR = VM_OC_NONE, /**< create implicit class constructor */
VM_OC_INIT_CLASS = VM_OC_NONE, /**< initialize class */
VM_OC_FINALIZE_CLASS = VM_OC_NONE, /**< finalize class */
VM_OC_PUSH_SUPER_CONSTRUCTOR = VM_OC_NONE, /**< getSuperConstructor operation */
VM_OC_RESOLVE_LEXICAL_THIS = VM_OC_NONE, /**< resolve this_binding from from the lexical environment */
VM_OC_SUPER_REFERENCE = VM_OC_NONE, /**< push super reference */
VM_OC_PUSH_SPREAD_ELEMENT = VM_OC_NONE, /**< push spread element */
VM_OC_GET_ITERATOR = VM_OC_NONE, /**< GetIterator abstract operation */
VM_OC_ITERATOR_STEP = VM_OC_NONE, /**< IteratorStep abstract operation */