https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78390
--- Comment #19 from Dominik Vogt <vogt at linux dot vnet.ibm.com> --- (In reply to Segher Boessenkool from comment #17) > Combine should probably not try to generate this extract, I wonder if it > can exist on any target. So where is it coming from? > > Of course the target should not "successfully" match it ;-) There is a discussion going on about this issue: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77822 I'm working on an s390[x] patch to reject such combinations, but the middleend should probably not generate this in the first place.
