Displaying 1 result from an estimated 1 matches for "4fe6e122".
2017 May 01
3
RFC: Stop using redundant PHI node entries for multi-edge predecessors
Today, the IR requires that if you have multiple edges from A to B
(typically with a switch) any phi nodes in B must have an equal number of
entries for A, but that all of them must have the same value.
This seems rather annoying....
1) It creates multiple uses of values in A for no apparently good reason
2) It makes updating PHI nodes using sets of predecessors incredibly hard
3) There is no