Removed ZEND_ACC_FINAL_CLASS which is unnecessary. This also fixed some currently defined classes as final which were just not being considered as such before.

Reduced size of zend_op on 64-bit systems.

the main idea - the smaller the zend_op structure, the lees memory traffic is required to load VM instructions during execution. The patch reduces

Reduced size of zend_op on 64-bit systems.

the main idea - the smaller the zend_op structure, the lees memory traffic is required to load VM instructions during execution. The patch reduces the size of each opcode from 48 to 32 bytes (saves 16 bytes for each opcode, and applications use thousands of opoceds). This reduced the number of CPU cache misses by 12% and improved performance of real-life apps by 1-2%.

The patch affects how constants and jump targets are represented in VM during execution. Previously they were implemented as absolute 64-bit pointers. Now they are relative 32-bit offsets.

In run-time constant now should be accessed as:
RT_CONSTANT(op_array, opine->op1) instead of opline->op1.zv
EX_CONSTANT(opline->op1) instead of opline->op1.zv

Jump targets:
OP_JMP_ADDR(opline, opline->op2) instead of opline->op2.jmp_addr

The patch doesn't change zend_op representation for 32-bit systems. They still use absolute addresses. The compile-time representation is also kept the same.

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Use zend_string* for op_array->arg_info[]->name and op_array->arg_info[]->class_name. For internal functions we still use char*.

Rename EX_VAR_2() into ZEND_CALL_VAR() and EX_VAR_NUM_2() into ZEND_CALL_VAR_NUM().

Pack EX(frame_info) into EX(This).u1.v.reserved. Rename "frame"kind" into "call_kind" and VM_FRAME_... into ZEND_CALL_...

Pack EX(num_args) into EX(This).u2.num_args

Get rid of EX(scope). In most cases we use EG(scope) anyway. EX(scope) was used to switch EG(scope) back after call, but it's possibleto use EX(func)->common.scope instead.

Changed "finally" handling. Removed EX(fast_ret) and EX(delayed_exception). Allocate and use additional IS_TMP_VAR slot on VM stack instead.

Reimplemented silence operator (@) handling on exceptions. Now each silence region is stored in op_array->brk_cont_array. On exception ZEND_HANDLE_EXCEPTION handler traverse this array and restore or

Reimplemented silence operator (@) handling on exceptions. Now each silence region is stored in op_array->brk_cont_array. On exception ZEND_HANDLE_EXCEPTION handler traverse this array and restore original EG(error_reporting) if exception occured inside a "silence" region.

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Improved object property access.

Get rid of ZEND_FETCH_MAKE_REF

Removed deprecated fields

Reorder fields for better alignment on both 32-bit and 64-bit systems

Remove useless parts of EX(old_error_reporting)

Merged EX(frame_kind) and EX(flags) into single word

Fixed list() behavior inconsistency (string handling is disabled for all cases, ArrayAccess objects handling is enabled for all cases, ZEND_FETCH_DIM_TMP_VAR opcode is renamed into ZEND_FETCH_LIST, Z

Fixed list() behavior inconsistency (string handling is disabled for all cases, ArrayAccess objects handling is enabled for all cases, ZEND_FETCH_DIM_TMP_VAR opcode is renamed into ZEND_FETCH_LIST, ZEND_FETCH_ADD_LOCK flag is removed).

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Replaced EG(This) and EX(object) with EX(This).
Internal functions now recieves zend_execute_data as the first argument.

Removed zend_execute_data->prev_nested_call. Reuse prev_execute_data instead.

Allocate copies of internal functions inherited in user classes at CG(arena), instead of permanent heap (malloc).

Simplify foreach flags

* FE_RESET_VARIABLE and FE_RESET_REFERENCE were always set
together.
* In some places the code checked FE_FETCH_BYREF instead of
FE_RESET_REFERENCE

Simplify foreach flags

* FE_RESET_VARIABLE and FE_RESET_REFERENCE were always set
together.
* In some places the code checked FE_FETCH_BYREF instead of
FE_RESET_REFERENCE and relied on them having the same value.
* Now the FE_RESET_* flags are dropped and everything uses
FE_FETCH_BYREF

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Split inheritance into separate file

This moves handling of inheritance and interface implementation
from zend_compile.c into a separate zend_inheritance.c file, as
this is not reall

Split inheritance into separate file

This moves handling of inheritance and interface implementation
from zend_compile.c into a separate zend_inheritance.c file, as
this is not really related to compilation.

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Changed "inline" into "zend_always_inline"

Switch (un)mangle property name to size_t and zend_string

Also use the _ex variants where possible.

Replaced macro with better optimized inline function

Reintroduce fix from pull #770 in a PHP 7 way