target/sh4: only save flags state at the end of the TB
There is no need to save flags when entering and exiting the delay slot. They can be saved only when reaching the end of the TB. If the TB is interrupted before by an exception, they will be restored using restore_state_to_opc. Reviewed-by: NRichard Henderson <rth@twiddle.net> Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>
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