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...14, David Greene wrote: > I discovered this through an assert I put into some of my own code. I want > to know if that assert is bogus or if there's a bug here. A little more information: the assert checks that after coalescing two nodes, all subregister live intervals for the register coaelsced to now interfere with whatever the eliminated live interval interfered with, since the superregister live interval now contains information from the eliminated live interval and thus it interferes with whatever the eliminated live interval interfered with (and thuis so should the subregister...

I have a question about what is going on at line 754 of SimpleRegisterCoalescing.cpp. The comment says we are updating the live intervals for subregisters. This happens when we coalesce to a physical register. Now, I read that as, "merge in the range information from the eliminated live interval to the subregister live interval," but that appears to not be what happens. In my case,

...overed this through an assert I put into some of my own >> code. I want >> to know if that assert is bogus or if there's a bug here. > > A little more information: the assert checks that after coalescing > two nodes, > all subregister live intervals for the register coaelsced to now > interfere > with whatever the eliminated live interval interfered with, since the > superregister live interval now contains information from the > eliminated live > interval and thus it interferes with whatever the eliminated live > interval > interfered with...