https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64317
--- Comment #23 from Jeffrey A. Law <law at redhat dot com> --- So with a functional prototype in place, I can get good code for this test. However, deeper testing of that prototype is proving difficult simply because the postreload-gcse.c code very rarely does anything useful, at least on x86 or x86-64. I put in some dumping in gcse_after_reload_main to always dump its statistics if its expression table has > 0 elements. Believe it or not, this *never* triggers during a bootstrap on x86_64. I was so amazed by this I fired up a VM and bootstraped i686 as well, nope, never fires there either. Concerned that maybe my other changes were somehow getting in the way, I put in just the dumping code, still doesn't fire. Yet it fires semi regularly in the testsuite. The original author of the code in postreload-gcse.c was doing their development on PPC boxes, so I'm going to grab one and see if I can get some useful testing from on it.
