search for: rarest

...se is to identify the set of blocks dominated by a block which is in the loop body of a hot loop, and is cold relative to the other successors of its predecessor(s). These form cold "regions" as I think of them without requiring the complexity of the region analysis. > > Since the rarest latch is often deep in a loop - with other "if (X) continue;" (i.e. latches) before it - this tends to create loops with multiple exiting blocks. Some of the existing passes might not deal with this well, is that a major concern? Suggestions for how to analysis and validate? > I'm...

...of a loop block something that's worth extracting out on it's own and reusing? Are there other similar uses anyone can think of? * Currently, I'm only supporting a fairly small set of controlling conditions. Are there important cases I'm not considering? * Since the rarest latch is often deep in a loop - with other "if (X) continue;" (i.e. latches) before it - this tends to create loops with multiple exiting blocks. Some of the existing passes might not deal with this well, is that a major concern? Suggestions for how to analysis and validat...

Do you often find yourself doing this: active = double(''active'') active.should_receive(:first) users = double(''users'', active: active) account.should_receive(:users).and_return(users) for this: account.users.active.first ? Of course, we could use stub_chain, but that doesn''t let us know *where* the chain broke. Would you like to do this?

...; These form cold "regions" as I think of them without requiring the > complexity of the region analysis. > > Static prediction should handle it -- call heuristics or some combination with other heuristics (error handler recognition etc). David > >> - Since the rarest latch is often deep in a loop - with other "if (X) >> continue;" (i.e. latches) before it - this tends to create loops with >> multiple exiting blocks. Some of the existing passes might not deal with >> this well, is that a major concern? Suggestions for how to...

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...he dom tree from the latch looking for such a cwhp block... This might be a better way to think about the profitability of the transform, even starting from the latch. Is that what you were trying to get at to start with? Or were you looking for something more general? > * Since the rarest latch is often deep in a loop - with other > "if (X) continue;" (i.e. latches) before it - this tends to > create loops with multiple exiting blocks. Some of the > existing passes might not deal with this well, is that a major > concern? Suggest...

...n on every loop iteration. With a more typical n-way cache, you'd have more leeway of course. 3. Not cause any other architectural exceptions/traps that clear the reservation state. So, that typically excludes floating point, memory barriers, etc. 4. Not take any branches. (This seems the rarest of the constraints; it's possible it's only relevant to Alpha and RISC-V, although maybe others just forgot to mention it as being potentially problematic.) 5. Execute only a small number of instructions within the loop. That last restriction seems most odd as a hard constraint, as oppo...

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