search for: killflag

...later passes will only perform the maximum amount of optimization will kill flags present [1] - Matthias [1] Long term we want to get rid of kill flags completely which should clean up a lot of code. But that is unfortunately a very tedious process, last time I tried to switch the biggest user of killflags (RegisterScavenger) to a new algorithm a powerpc stage2 buildbot broke and I never figured out why... > On May 17, 2017, at 11:29 AM, Nemanja Ivanovic via llvm-dev <llvm-dev at lists.llvm.org> wrote: > > This kind of sounds like the peephole optimization should really be resetting...

Hello Devs, Machine Instruction verifier pass always validates Live variable info associated with MachineInstr along with other checks. Please consider following scenario (w.r.t bugZilla 32583) 1/ MachineCSE pass may prohibit optimising out a common sub-expression for instruction using physical registers by looking at the LiveIn info of successor basic blocks. 2/ Which means we need Live