JitArm64: Skip redundant imm to register writes

When a guest register is an immediate, it may be necessary to move this
value into a register. This is handled by gpr.R(), which lacks context
on how the register will be used. This leads to cases where the
immediate is written to a register, only for it to be overwritten. Take
for example this code generated by srwx:

0x5280031b   mov    w27, #0x18
0x53187edb   lsr    w27, w22, #24

gpr.BindToRegister() does have this context through the do_load
parameter, but didn't handle immediates. By adding this logic, we can
intelligently skip the write when do_load is false.

0 files changed, 0 insertions, 0 deletions