Use low bits

Avoid repeatable ARG_SHOULD_BE_SENT_BY_REF() checks in FETCH_*FUNC_ARG and following SEND_VAR_EX. Perform the check once in a new CHECK_FUNC_ARG opcode and reuse in the following FETCH_*FUNC_ARG and

Avoid repeatable ARG_SHOULD_BE_SENT_BY_REF() checks in FETCH_*FUNC_ARG and following SEND_VAR_EX. Perform the check once in a new CHECK_FUNC_ARG opcode and reuse in the following FETCH_*FUNC_ARG and SEND_FUNC_ARG (SEND_VAR_EX replacement).

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Break dependency between IS_TYPE_REFCOUNTED and ZEND_CALL_FREE_EXTRA_ARGS

Changed CATCH instruction format (extended_value moved into op2, op2 into result, result into extended_value)

Make IS_UNUSED to be zero.

Change FETCH/ISSET instruction modifiers:
- Get rid of ZEND_ISEMPTY and ZEND_ISSET_ISEMPTY_MASK. Use just single ZEND_ISSET bit to make distinct between isset() and empty()
- Use ZEND_FETCH_G

Change FETCH/ISSET instruction modifiers:
- Get rid of ZEND_ISEMPTY and ZEND_ISSET_ISEMPTY_MASK. Use just single ZEND_ISSET bit to make distinct between isset() and empty()
- Use ZEND_FETCH_GLOBAL, ZEND_FETCH_LOCAL and ZEND_FETCH_GLOBAL_LOCK as bitmask
- Removed unused ZEND_FETCH_STANDARD
- Extended ZEND_FETCH_ARG_MASK

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Inline function

Reorder zend_op_array fields for better data locality and packing

Get rid of zend_op_array.early_binding

year++

year++

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Apply calling convention explicitly to the function, not to the decl.

Use "fastcal" calling convention for internal PHP functions on x86

Always use IS_CONSTANT_AST (IS_CONSTANT is removed).

Changed the way VM accesses constant operands in 64-bit builds.

Separate ISSET_ISEMPTY_CV/UNSET_CV from ISSET_ISEMPTY_VAR/UNSET_VAR

further sync for vim mode lines

shutdown_executor() refactoring (reuse opcache fast request shutdown code)

Introduced "zif_handler" type (zif = zend internal function).

Drop ZEND_API from zend_assert_valid_class_name

This is a convenience function for internal use and shouldn't have been
exported.

Remove the ZEND_ACC_CLONE flag

This one is completely unused

Document which function flags are still free

Also clearly separate method and class flags.

Remove spurious `CG(context).in_finally` dingleberry

Introduced "zend_type" - an abstraction for type-hinting representation.