help needed on gcc instruction scheduling with unspec_volatile()

[raja . saleru]

Hi,

In gcc, while instruction scheduling can it be possible to suspend the
scheduling for some instructions ? or

Is there a way to make the instruction has to allocate to run without
using the scheduler for particular instruction ?

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 ?


Please help us to understand the above.

Thanks in advance
Raja Saleru