GCC12 use profiled created by create_gcov doesn't work

[andyzhaozhenyu]

I tried to use Autofdo on GCC12 to optimize bubble_sort, but I checked the cfg. The count for basic block is not correct.

[erozenfeld]

@andyzhaozhenyu andyzhaozhenyu Can you share the command lines and the output of your invocation of perf and create_gcov?

[andyzhaozhenyu]

gcc -g -O2 -o pmu test.c -fauto-profile=pmu.gcov -fdump-ipa-afdo-details
/home/zzy/used/autofdo/autofdo-0.19/build/create_gcov --binary=baseline --profile=pmu.data --gcov=pmu.gcov --gcov_version=2 --use_lbr=0

And here is the output for dump_gcov

[erozenfeld]

@andyzhaozhenyu I tried this with my version of bubble_sort and GCC12 and I see that the counts are propagated correctly. Can you share your test.c and full output of gcc -g -O2 -o pmu test.c -fauto-profile=pmu.gcov -fdump-ipa-afdo-details ?