Balaji V. Iyer wrote: > This is what I am trying to achieve. I want to indicate to my processor > at certain points of execution to do certain control behavior. I am > trying to do this by inserting a specialized instruction that will do > so. > > I am not using the unspec model. I created a new RTL in rtl.def, then I > am inserting that RTL at fixed points of my code, and have a constraint > in my .md file to catch that RTL and convert it into an instruction.
That isn't going to work unless you tell gcc what your magic instruction does. I suggest you use an UNSPEC_VOLATILE. Andrew.
