Removed already implemented TODO comment

Eliminate useless exception checks

Tracing JIT support for include() and generators

Improve tracing JIT for FETCH_THIS + FETCH_OBJ_*

JIT for FETCH_OBJ_W

Use guards for ZEND_FETCH_OBJ_R/IS to eliminate repeatable checks

Tracing JIT support for PHP references in ASSIGN instruction

Use ZEND_UNREACHABLE() instead of ZEND_ASSERT(0)

Instead of marking unreachable code with `ZEND_ASSERT(0)`, we introduce
`ZEND_UNREACHABLE()`, so that MSVC which does not consider `asser

Use ZEND_UNREACHABLE() instead of ZEND_ASSERT(0)

Instead of marking unreachable code with `ZEND_ASSERT(0)`, we introduce
`ZEND_UNREACHABLE()`, so that MSVC which does not consider `assert(0)`
to mark unreachable code does no longer trigger C4715[1] warnings in
debug builds. This may be useful for other compilers as well.

[1] <https://docs.microsoft.com/de-de/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4715?view=vs-2019>

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Tracing JIT support for PHP references in array related instructions

Setup RETURN counters for nested frames

Tracing JIT support for megamorphic calls

[ci skip] Fixed some minor typos in code comments

Tracing JIT support for real dynamic calls

Fix MSVC level 1 (severe) warnings

We fix (hopefully) all instances of:

* <https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4005>

Fix MSVC level 1 (severe) warnings

We fix (hopefully) all instances of:

* <https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4005>
* <https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4024>
* <https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4028>
* <https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4047>
* <https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4087>
* <https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4090>
* <https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4273>
* <https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4312>

`zend_llist_add_element()` and `zend_llist_prepend_element()` now
explicitly expect a *const* pointer.

We use the macro `ZEND_VOIDP()` instead of a `(void*)` cast to suppress
C4090; this should prevent accidential removal of the cast by
clarifying the intention, and makes it easier to remove the casts if
the issue[1] will be resolved sometime.

[1] <https://developercommunity.visualstudio.com/content/problem/390711/c-compiler-incorrect-propagation-of-const-qualifie.html>

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Add guard for FETCH_DIM_FUNC_ARG

Tracing JIT for FETCH_DIM_FUNC_ARG and FETCH_OBJ_FUNC_ARG when they are used in READ mode (to pass by value).

Fixed abstract stack consistency for JMPZ_EX/JMPNZ_EX

Avoid reference counting when RETURN CV

Tracing JIT support for indirect CV modification (may be incomplete)

Fixed retutn type inference when return undefined variable

Fixed tracing JIT register allocator (failure on ext/opcache/tests/jit/assign_002.phpt)

Allow tracing JIT generate code when function exits from VM (e.g. for magic __get/__set)

Don't add guards that are not going to be checked

Fixed use-after-free in tracing JIT when recording closures and top-level op_arrays.

Fixed tracing JIT type inference for passing undefined CV by value