JIT does not emit trampolines for jumps to addresses encoded as operands

[markshannon]

Bug report

Bug description:

We need to declare variables volatile here and in #148745 otherwise the code generator emits normal jumps without the necessary patching to add trampolines.

For more details see #148745 (comment)

CPython versions tested on:

CPython main branch

Operating systems tested on:

No response

[NekoAsakura]

Same workarounds:

cpython/Python/bytecodes.c

Line 5129 in 7c9ad27

volatile PyCFunctionFastWithKeywords cfunc_v = _PyCFunctionFastWithKeywords_CAST(cfunc);

cpython/Python/bytecodes.c

Line 5199 in 7c9ad27

volatile PyCFunction cfunc_v = (PyCFunction)cfunc;

cpython/Python/bytecodes.c

Line 5272 in 7c9ad27

volatile PyCFunctionFast cfunc_v = _PyCFunctionFast_CAST(cfunc);