------- Comment #13 from steven at gcc dot gnu dot org 2006-01-09 22:23 ------- AMD64 timings for today's GCC 4.1 (20060109) branch:
flags used score for compilation (avg. of 3, higher is better) -O3 685.2 -O3 -fprofile-generate 636 -O3 -fprofile-use 785.6 -O3 -fno-tree-pre 958.4 -O3 -fno-tree-pre -fprofile-generate 673.8 -O3 -fno-tree-pre -fprofile-use 964.2 -O3 -fno-tree-pre -fmove-loop-invariants 967.2 The problem really is that we present the register allocator with a harder problem. Tough, there is really not much that can be done about this other than crippling PRE for SMALL_REGISTER_CLASSES machines, but I don't know if we should want to do that... -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21485
