Improved specializer (Bob)

- All helpers now may be declatred and called without ZEND_VM_HELPER_EX() and ZEND_VM_DISPATCH_TO_HELPER_EX() macros
- ZEND_VM_HELPER() may declare few argumen

Improved specializer (Bob)

- All helpers now may be declatred and called without ZEND_VM_HELPER_EX() and ZEND_VM_DISPATCH_TO_HELPER_EX() macros
- ZEND_VM_HELPER() may declare few arguments
- ZEND_VM_DISPATCH_TO_HELPER() may pass few parameters
- ZEND_VM_INLINE_HELPER() may be used to declare inline helpers (it won't be inlined in SWITH/GOTO executors)

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Changed ZEND_FREE.op2.num and ZEND_FE_FREE.op2.num back to use live_range_offset (try_catch_offset does't work)

Changed meaning of "op2" for ZEND_FREE, ZEND_FE_FREE, ZEND_FAST_CALL, ZEND_FAST_RET.
Previously it was an instruction number.
Now it's an index in op_array->try_cacth_array[].

Changed ZEND_CLONE->extended_value meaning to relative offset (previously it was absolute opline number)

Argument type renaming (ADDR->JMP_ADDR, OPLINE->JMP_ABS, REL_OPLINE->JMP_REL)

Fixed few issues:

- Added ZEND_VM_LAST_OPCODE macro
- Use better names LINE->OPLINE, REL_LINE->REL_OPLINE, FCALL->FAST_CALL, FRET->FAST_RET
- Added ISSET flag to extended value of ZE

Fixed few issues:

- Added ZEND_VM_LAST_OPCODE macro
- Use better names LINE->OPLINE, REL_LINE->REL_OPLINE, FCALL->FAST_CALL, FRET->FAST_RET
- Added ISSET flag to extended value of ZEND_ISSET_ISEMPTY_VAR opcode

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Added zend_get_opcode_flags() function to get information about opcode operands and extended_value meaning

Allow an experimental VM with tail call dispatch technique (disabled by default).
This VM may work only if all tail calls are optimized, otherwaise it will crach because of stack overflow.
Un

Allow an experimental VM with tail call dispatch technique (disabled by default).
This VM may work only if all tail calls are optimized, otherwaise it will crach because of stack overflow.
Unfortunately, we can't guarantee tail call optimization in C.

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Suppressed warning -Wvolatile-register-var

Fix zend_vm_call_opcode_handler (e.g. Generators throwing exceptions) with IP/FP registers

Assign CPU registers for GOTO and SWITCH executor as well

Removed deprecated comments and added expectations (overloaded properties and array elements are less frequently used than regular ones)

Revert "Simplify ZEND_EXIT and count boolean values to it as exit status"

This reverts commit 7c003948c618adb2a6691f529057388f02202f09.

Simplify ZEND_EXIT and count boolean values to it as exit status

Fixed typo

Improve the conditions(save one comparison)

Preserve return value in zend_vm_call_opcode_handler with global opline/ex registers enabled

Hint label lookup table initialization branch on GOTO VM kind.

This initialization is performed only once so it shall be marked as unexpected.

Fixed situation, when CHECH_EXCEPTION() might change value of "opline" variable and the following "opline" useages would access elements of different opcode. That might lead to unpredictable behavior

Fixed situation, when CHECH_EXCEPTION() might change value of "opline" variable and the following "opline" useages would access elements of different opcode. That might lead to unpredictable behavior. (Only PHP-7 with GCC global register variables was affected).
CHECK_EXCEPTION() macro is removed. ZEND_VM_NEXT_OPCODE_CHECK_EXCEPTIO() should be used instead. It's equivalent to old CHECK_EXCEPTION() + ZEND_VM_NEXT_OPCODE().
As a side effect, this also slightly improved performnce of builds with GCC >= 4.8.

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Fixed ZEND_VM_DEFINE_OP build when --without-specializer

Unused ret

Removed useless #ifdef

Make CALL VM with FP and IP in global registers not to return anything from opcode handlers.
Set OPLINE to NULL to terminate VM loop instead.
This saves 1 CPU instruction for each opcode hand

Make CALL VM with FP and IP in global registers not to return anything from opcode handlers.
Set OPLINE to NULL to terminate VM loop instead.
This saves 1 CPU instruction for each opcode handler.

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Delay checks for undefined CV variables after checks for fast paths.

Properly define ZEND_OP_DATA in zend_vm_def.h
This allows zend_vm_gen.php to define them in zend_vm_opcodes.{c,h} without further hacks.