https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64928
--- Comment #31 from Richard Biener <rguenth at gcc dot gnu.org> --- (In reply to lucier from comment #30) > I'm coming back to this project. > > I naively thought "Well, I don't need arc profiling, I'll just set > -ftest-coverage without -fprofile-arcs" but it appears that I can't do that, > the gcda files are generated by -fprofile-arcs. > > It seems to me that test coverage could be implemented simply by > instrumenting each basic block in an algorithm that's linear in the number > of basic blocks. Is it possible to do this? > > Brad I don't think the instrumentation itself is the problem - it's already doing better than one counter per block. It's simply that the large source runs into multiple non-linearities in core pieces of the compiler that cannot be turned off ...
