search for: compare_and_maybe_decrement

Displaying 1 result from an estimated 1 matches for "compare_and_maybe_decrement".

2020 Aug 07
2
Branches which return values in SelectionDAG
...to know if this is possible. Trying to combine the two concepts (Value-returning branches and handling them in the selection DAG), I wrote my backend to generate: header: %InitialVal = N body: %IndVar = PHI(%InitialVal, %header, %DecVal, %body) ... %MultipleReturns = call {i32, i1} compare_and_maybe_decrement(%IndVar, 1) %DecVal = extract {i32, i1} %MultipleReturns 0 %Cond = extract {i32, i1} %MultipleReturns 1 br %Cond, body, exit exit: ... Then, I attempted to combine the intrinsic, extractions, and branch together in the SelectionDAG. What I found, however, is that this concept, whic...