180   Vec                 X, dX, lX, F, dXold;  in SNESSolve_NCG()  local
196   dX     = snes->work[1];        /* the preconditioned direction */  in SNESSolve_NCG()
210     PetscCall(SNESApplyNPC(snes, X, NULL, dX));  in SNESSolve_NCG()
216     PetscCall(VecCopy(dX, F));  in SNESSolve_NCG()
225     PetscCall(VecCopy(F, dX));  in SNESSolve_NCG()
229       PetscCall(SNESApplyNPC(snes, X, F, dX));  in SNESSolve_NCG()
237   PetscCall(VecCopy(dX, lX));  in SNESSolve_NCG()
238   PetscCall(VecDot(dX, dX, &dXdotdX));  in SNESSolve_NCG()
257     if (ncg->type != SNES_NCG_FR) PetscCall(VecCopy(dX, dXold));  in SNESSolve_NCG()
284         PetscCall(SNESApplyNPC(snes, X, NULL, dX));  in SNESSolve_NCG()
290         PetscCall(VecCopy(dX, F));  in SNESSolve_NCG()
292         PetscCall(SNESApplyNPC(snes, X, F, dX));  in SNESSolve_NCG()
300       PetscCall(VecCopy(F, dX));  in SNESSolve_NCG()
307       PetscCall(VecDot(dX, dX, &dXdotdX));  in SNESSolve_NCG()
312       PetscCall(VecDotBegin(dX, dX, &dXdotdX));  in SNESSolve_NCG()
313       PetscCall(VecDotBegin(dXold, dX, &dXdotdXold));  in SNESSolve_NCG()
314       PetscCall(VecDotEnd(dX, dX, &dXdotdX));  in SNESSolve_NCG()
315       PetscCall(VecDotEnd(dXold, dX, &dXdotdXold));  in SNESSolve_NCG()
320       PetscCall(VecDotBegin(dX, dX, &dXdotdX));  in SNESSolve_NCG()
321       PetscCall(VecDotBegin(dX, dXold, &dXdotdXold));  in SNESSolve_NCG()
322       PetscCall(VecDotBegin(lX, dX, &lXdotdX));  in SNESSolve_NCG()
324       PetscCall(VecDotEnd(dX, dX, &dXdotdX));  in SNESSolve_NCG()
325       PetscCall(VecDotEnd(dX, dXold, &dXdotdXold));  in SNESSolve_NCG()
326       PetscCall(VecDotEnd(lX, dX, &lXdotdX));  in SNESSolve_NCG()
331       PetscCall(VecDotBegin(dX, dX, &dXdotdX));  in SNESSolve_NCG()
332       PetscCall(VecDotBegin(lX, dX, &lXdotdX));  in SNESSolve_NCG()
334       PetscCall(VecDotEnd(dX, dX, &dXdotdX));  in SNESSolve_NCG()
335       PetscCall(VecDotEnd(lX, dX, &lXdotdX));  in SNESSolve_NCG()
340       PetscCall(VecDotBegin(dX, dX, &dXdotdX));  in SNESSolve_NCG()
342       PetscCall(VecDotEnd(dX, dX, &dXdotdX));  in SNESSolve_NCG()
348     PetscCall(VecAYPX(lX, beta, dX));  in SNESSolve_NCG()