search for: upper_half

...nsider-register-defined-here ... = R0_R1 // Use the pair specifically with IMPLICIT_DEF, but that does not do what I thought it would. I have also thought of doing this before register allocation, using something like this: vreg100:lower_half<def,read-undef> = ... vreg100:upper_half<def,read-undef> = ... but the after the second instruction, the "lower_half" will revert to "undef" (at least according to my understanding). Having simply vreg100:lower_half<def,read-undef> = ... vreg100:upper_half<def> = ... will treat the...