ddmetro <puzzle...@gmail.com> writes: > 1. We are expecting that pass_sched and pass_sched2, each will enter > schedule_insns() function once per pass. However, we found that it is > entering schedule_insns() function per function(in the program) per pass. > (If there are two functions in the input program, pass_sched will enter > schedule_insns() twice and pass_sched2 will also enter schedule_insns() > twice.)We are not able to track this flow in the code. Kindly help us as to > what are we missing out?
I got six copies of your message. One is sufficient. The optimization passes are all run for each function. If you have two functions, pass_sched and pass_sched2 will each be run twice. > 2. We are trying to visualize the code into regions and then into basic > blocks i.e., what all insns form a basic block and what basic blocks form a > region. > Also we are trying to figure out - the before and after scenarios - when > an insn moves from one basic block to another. > However we are not able to map this information looking at any of the rtl > dump files. > Kindly help us as to what should be our approach? Look for the basic block notes or use -fdump-rtl-all-blocks. > 3. We are trying to figure out the difference and need of 2 passes, both > calling the same function(schedule_insns()). However, we are unable to find > any difference in the two calls to schedule_insns() in two schedule > passes(pass_sched and pass_sched2). Kindly help us as to what are we missing > out? The difference is that pass_sched is called before register allocation and pass_sched2 is called after. Ian
