On Mon, Apr 22, 2013 at 3:10 PM, Steve Ellcey <sell...@imgtec.com> wrote: > I have a basic GCC PHI implementation question, if a basic block has > a phi node (or a set of phi nodes) those nodes consist of a pairs of > definitions and basic block pointers. Are the basic blocks associated > with each definition gauranteed to be direct predecessors of the block > containing the phi node? Or could the block with the definition be an > indirect predecessor of the block with the phi? Does it matter what > pass in the compiler I am at? I.e. maybe they start out as direct > predecessors and various optimizations could change that.
They should always be direct predecessors of the basic block of the PHI node. If it is not then there is a bug. Thanks, Andrew Pinski > > Steve Ellcey > sell...@imgtec.com >
