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...9;t :-). Do you have an example where being able to > do optimizations would be useful? > > Dan > I don't have a real example for the readcycles, but I could think that a profiler wants to profile something, and inserts it and it ends up with: loop ... read_cycle_counter call_to_function read_cycle_counter .... Now, the presence of read_cycle_counter would prevent GVN from working in that loop, since read_cycle_counter would be seen as a depedency of every load and store (including the one from the induction variable). So by inserting the read_cycle_counter it pessimized the c...

...re being able to >> do optimizations would be useful? >> > I don't have a real example for the readcycles, but I could think > that a > profiler wants to profile something, and inserts it and it ends up > with: > > loop > ... > read_cycle_counter > call_to_function > read_cycle_counter > .... > > Now, the presence of read_cycle_counter would prevent GVN from working > in that loop, since read_cycle_counter would be seen as a depedency of > every load and store (including the one from the induction > variable). So > by inserting the...

...>>> >>> >> I don't have a real example for the readcycles, but I could think >> that a >> profiler wants to profile something, and inserts it and it ends up >> with: >> >> loop >> ... >> read_cycle_counter >> call_to_function >> read_cycle_counter >> .... >> >> Now, the presence of read_cycle_counter would prevent GVN from working >> in that loop, since read_cycle_counter would be seen as a depedency of >> every load and store (including the one from the induction >> variable...