add_join_conditional()'s job is to take the 2 alternatives of the conditional, make a phi-node from them and return the corresponding pseudo but if one of the alternatives is not available it's useless to create a phi-node and the other alternative can then directly be returned. The problem is that in this later case, the pseudo directly returned is the PSEUDO_PHI of the corresponding phi-source. This gives erroneous code like, for example: phisrc.32 %phi1 <- $0 ret.32 %phi1 instead of: ret.32 $0 since the %ph1 should only be used by a phi-node instruction. Fix this by returning phi-source's operand instead. Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>