search for: op0vt

...ackend's architecture truncate is free, but zext is not (and i64 is not a desirable type for xor or any binary operation in general), so I would expect this optimization to be bypassed but because of the following statement : (N0.getOpcode() == ISD::TRUNCATE && (!TLI.isZExtFree(VT, Op0VT) || !TLI.isTruncateFree(Op0VT, VT)) it is not (as isZExtFree return false for my architecture while isTruncateFree returns true). The comment on binop simplification says that binop over truncs should be optimize only if trunc is not free, so I do not understand the point of adding !isZExtFree...