raja.sal...@iap-online.com writes: > In gcc, while instruction scheduling can it be possible to suspend the > scheduling for some instructions ? or
No. You can turn off instruction scheduling for the entire compilation. You can use #pragma GCC optimize to turn scheduling off for a specific function. But there is no way to turn it off for some instructions within a function but not others. > Is there a way to make the instruction has to allocate to run without > using the scheduler for particular instruction ? I don't understand the question. > Currently there is RTL template in machine description unspec_volatile(). > If the instruction is scheduled using this, does this make the instruction > out of scope of scheduler ? Nothing is out of scope of the scheduler. Using unspec_volatile in the RTL template makes the instruction a scheduling barrier and a memory barrier. Ian
