https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87763
--- Comment #41 from Segher Boessenkool <segher at gcc dot gnu.org> --- Seeing that the code in your examples can be expressed as a bitfield insert requires that combine sees that only the low 8 bits of reg 93 can be non-zero, by the way. It usually does not know this. It could in this case if it was combining insn 6 as well. Did it try that before? What happened?
