Hello, ping # 3 for http://gcc.gnu.org/ml/gcc-patches/2012-04/msg00298.html
This is related to convert-move possibly emitting a sequence with multiple accesses to one input, triggering multiple memory accesses when that input happens to be a mem. > The original problem we had with this was the introduction of an > artificial race condition in addition to the potential performance > impact. > While our original testcases don't expose the problem with current > versions of the compiler, the issue appears to remain latent and the > change still looks sensible in any case. ... > * expr.c (convert_move): Latch mem integer inputs into a > register before expanding a multi-instructions sequence. Thanks in advance, Olivier
