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instcombine can handle certain orders of "icmp"s that are "or"ed together: x != 5 OR x > 10 OR x == 8 becomes.. x != 5 OR x == 8 becomes.. x != 5 However, a different ordering prevents the simplification: x == 8 OR x > 10 OR x != 5 becomes.. %or.eq8.gt10 OR x != 5 and that can't be simplified because we now have an "or" OR "icmp". What would I need to implement to restore the commutative property? Perhaps a first stab would be to take (A|B)|C create two binaryOp A|C and B|C and recursively call visitOr on each of them...

...bine can handle certain orders of "icmp"s that are "or"ed together: > x != 5 OR x > 10 OR x == 8 becomes.. > x != 5 OR x == 8 becomes.. > x != 5 > > However, a different ordering prevents the simplification: > x == 8 OR x > 10 OR x != 5 becomes.. > %or.eq8.gt10 OR x != 5 > and that can't be simplified because we now have an "or" OR "icmp". > > What would I need to implement to restore the commutative property? > > Perhaps a first stab would be to take (A|B)|C create two binaryOp A|C > and B|C and recursively...

Hello list. I'm trying to rebuild the 2.6.9.67.0.20.EL kernel, but it fails even without modifications. How did I try it? Created a (non-root) build environment (not a mock ) Installed the kernel.scr.rpm and did a rpmbuild -ba --target=`uname -m` kernel-2.6.spec 2> prep-err.log | tee prep-out.log The build failed at the end: Processing files: kernel-xenU-devel-2.6.9-67.0.20.EL Checking