llvm-project

2f1e33df - [X86] Fold add(psadbw(X,0),psadbw(Y,0)) -> psadbw(add(X,Y),0)

[X86] Fold add(psadbw(X,0),psadbw(Y,0)) -> psadbw(add(X,Y),0) If the vXi8 add(X,Y) is guaranteed not to overflow then we can push the addition though the psadbw nodes (being used for reduction) and only need a single psadbw node. Noticed while working on CTPOP reduction codegen