exec_byte_code: reduce use of semi-global 'op' (bug#79610)

* src/bytecode.c (exec_byte_code):
Re-type op from int to ptrdiff_t, which avoids some useless conversions.
Reduce its use by using local variables for intra-block use,
and another variable (arg) where it doesn't need to be alive across
instruction dispatch.  We also eliminate it where performance doesn't
matter by re-fetching it from the instruction stream.

All this should help the register allocator.

0 files changed, 0 insertions, 0 deletions