search for: computedeadvalues

...the register allocator later tries to spill/reload %vreg39 it thinks that %vreg39 is live, so it inserts a reload after the bundle, but then the verifier pukes on it and says that there is a use of the register after it's dead. The dead-marking on the BUNDLE is introduced by LiveIntervals::computeDeadValues which does // This is a dead def. Make sure the instruction knows. MachineInstr *MI = getInstructionFromIndex(Def); assert(MI && "No instruction defining live value"); MI->addRegisterDead(LI.reg, TRI); and the reload after the BUNDLE is introduced...

...llocator later tries to spill/reload %vreg39 it thinks that %vreg39 is live, so it inserts a reload after the bundle, but then the verifier pukes on it and says that there is a use of the register after it's dead. >> >> The dead-marking on the BUNDLE is introduced by LiveIntervals::computeDeadValues which does >> >> // This is a dead def. Make sure the instruction knows. >> MachineInstr *MI = getInstructionFromIndex(Def); >> assert(MI && "No instruction defining live value"); >> MI->addRegisterDead(LI.reg, TRI); > > I t...

Hi Jonas, > On Apr 20, 2015, at 4:03 AM, Jonas Paulsson <jonas.paulsson at ericsson.com> wrote: > > Hi Quentin, > > After Simple Register Coalescing. Is the code you have pasted with the PHIs feed to the register coalescer? I am trying to understand the setting to help debugging the problem. Also, what does -debug-only=regalloc tell you? Thanks, -Quentin > >