Optimized access to temporary and compiled VM variables

. The VM stacks for passing function arguments and syntaticaly nested calls were merged into a single stack. The stack size needed for op_array execution is calculated at compile time and preallocate

. The VM stacks for passing function arguments and syntaticaly nested calls were merged into a single stack. The stack size needed for op_array execution is calculated at compile time and preallocated at once. As result all the stack push operatins don't require checks for stack overflow any more.
. Generators implementation was improved using the new VM stack. Now it's a bit more clear and faster.

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Use zend_execute_internal always to call internal functions

Remove asterix modifier (*) for generators

Generators are now automatically detected by the presence of a `yield`
expression in their body.

This removes the ZEND_SUSPEND_AND_RET

Remove asterix modifier (*) for generators

Generators are now automatically detected by the presence of a `yield`
expression in their body.

This removes the ZEND_SUSPEND_AND_RETURN_GENERATOR opcode. Instead
additional checks for ZEND_ACC_GENERATOR are added to the fcall_common
helper and zend_call_function.

This also adds a new function zend_generator_create_zval, which handles
the actual creation of the generator zval from an op array.

I feel like I should deglobalize the zend_create_execute_data_from_op_array
code a bit. It currently changes EG(current_execute_data) and
EG(opline_ptr) which is somewhat confusing (given the name).

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Fix thread safe build

Fix backtraces and func_get_args()

To make the generator function show up in backtraces one has to insert an
additional execute_data into the chain, as prev_execute_data->function_state

Fix backtraces and func_get_args()

To make the generator function show up in backtraces one has to insert an
additional execute_data into the chain, as prev_execute_data->function_state
is used to determine the called function.

Adding the additional stack frame is also required for func_get_args(), as
the arguments are fetched from there too. The arguments have to be copied
in order to keep them around. Due to the way they are saved doing so is
quite ugly, so I added another function zend_copy_arguments to zend_execute.c
which handles this.

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Properly free resources when generator return value not used

To keep things clean two new functions are introduced:

zend_clean_and_cache_symbol_table(HashTable *symbol_table)
ze

Properly free resources when generator return value not used

To keep things clean two new functions are introduced:

zend_clean_and_cache_symbol_table(HashTable *symbol_table)
zend_free_compiled_variables(zval ***CVs, int num)

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Add support for executing a zend_execute_data

This adds another function execute_ex(), which accepts a zend_execute_data
struct to run (contrary to execute(), which accepts a zend_op_arr

Add support for executing a zend_execute_data

This adds another function execute_ex(), which accepts a zend_execute_data
struct to run (contrary to execute(), which accepts a zend_op_array from
which it initialized the execute_data).

This needs a bit more cleanup.

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- Year++

Fixed ZE specific compile warnings (Bug #55629)

- Year++

reduced size of temp_variariable

- Strip out the typehint *checks* only. They are still parsed, and they are
still accessible through the reflection API.

Reduced initial VM stack size to fit into zend_mm segment and eliminate extra segment allocation

- Fixed bug #51905 (ReflectionParameter fails if default value is an array with an access to self::)

Added caches to eliminate repeatable run-time bindings of functions, classes, constants, methods and properties

Added a number of small performance tweaks and optimizations
. ZEND_RECV now always has IS_CV as its result
. ZEND_CATCH now has to be used only with constant class names
. ZEND_FET

Added a number of small performance tweaks and optimizations
. ZEND_RECV now always has IS_CV as its result
. ZEND_CATCH now has to be used only with constant class names
. ZEND_FETCH_DIM_? may fetch array and dimension operans in a different order

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Changed the structure of op_array.opcodes. The constant values are moved from opcode operands into a separate literal table

Fixed bug #50723 (Bug in garbage collector causes crash)

sed -i "s#1998-2009#1998-2010#g" **/*.c **/*.h **/*.php

- Fixed warnings (Kalle)

Fixed bug #46074 (Bus error during running PHP CLI under IRIX 6.5.30)

Fixed ability to call user functions from user opcodes without recursion

- fix build (void alarm)

MFH: Added zend_eval_stringl and made create_function(), etc. binary-safe