On 12/08/15 09:43, Richard Earnshaw wrote: > On 12/08/15 09:32, Richard Earnshaw wrote: >> On 12/08/15 02:11, Richard Henderson wrote: >>> I'm somewhat surprised that the operands to the logicals aren't >>> visible at rtl generation time, given all the work done in gimple. >>> And failing that, combine has enough REG_EQUAL notes that it ought >>> to be able to put things back together and see the simpler pattern. >>> >> >> We've tried it in the past. Exposing the individual steps prevents the >> higher-level rtl-based optimizations since they can no-longer deal with >> the complete sub-expression. > > Eg. https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63724 > > R. > And https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65768
R.
