http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48352
--- Comment #8 from Joost VandeVondele <Joost.VandeVondele at pci dot uzh.ch> 2011-04-01 06:17:51 UTC --- BTW, from this experience, it would be great to have the frontend optimizations being protected by a switch (-f(no-)frontend-optimizations or similar) which can default to true at -O1 and higher. First, this would provide an easy workaround for this kind of bugs. Second, this would make sense in combination with LTO, where in principle one could compile in the first pass with -O0, and only at link time with -Ox (this makes sense from a compile time point of view). However, for this to generate good code, the first pass should be -O0 -ffrontend-optimizations, otherwise the middle end would have no chance.
