Hi, On Mon, Jan 12, 2015 at 12:22:44AM +0300, Ilya Verbin wrote: > Hi! > > Currently if a target* pragma appears within a target region, GCC successfully > compiles such code (with a warning). But the binary fails at run-time, since > it > tries to call GOMP_target* functions on target. > > The spec says: "If a target, target update, or target data construct appears > within a target region then the behavior is unspecified." > > I see 2 options to make the behavior more user-friendly: > 1. To return an error at compile-time. > 2. To check at run-time in libgomp whether GOMP_target* is called on target, > and > perform target-fallback if so. >
What actually happens when an accelerator calls a libgomp function? Is a target libgomp port invoked? If so, it should easily know it runs on a target even without a run-time check, I suppose. Or do you somehow bring that call back to the host? Thanks, Martin
