topic PGO with slightly different source code than was used to genera in Intel® Fortran Compiler

PGO with slightly different source code than was used to generate profiles

gregfi04 — Thu, 22 Sep 2011 18:03:04 GMT

I'm in the final stages of testing a code, and I found typos in a couple of the error messages. Can I just do a recompile with PGO using the old profiles, or do I need to regenerate the profile data?

Thanks,

Greg

PGO with slightly different source code than was used to genera

Steven_L_Intel1 — Thu, 22 Sep 2011 19:46:15 GMT

If you just changed the text of a character string, you won't need to redo the profiles. But if you change the logic of the program, you would.

PGO with slightly different source code than was used to genera

gregfi04 — Thu, 22 Sep 2011 20:01:35 GMT

Great, thanks. If logic were changed, would the compiler be smart enough to detect a mismatch? If not, could it potentially cause problems?

PGO with slightly different source code than was used to genera

Steven_L_Intel1 — Thu, 22 Sep 2011 20:34:30 GMT

It might, if the number of "basic blocks" of code paths changed. If it didn't, the results could mislead the compiler into making optimization choices it shouldn't.