[X86] LowerABD - remove freeze from abd*(lhs, rhs) -> trunc(abs(sub(*ext(lhs), *ext(rhs))))

Single use each of lhs/rhs so we shouldn't need them.

Author: RKSimon

llvm/lib/Target/X86/X86ISelLowering.cpp

@@ -28180,10 +28180,8 @@ static SDValue LowerABD(SDValue Op, const X86Subtarget &Subtarget,
       // abds(lhs, rhs) -> trunc(abs(sub(sext(lhs), sext(rhs))))
       // abdu(lhs, rhs) -> trunc(abs(sub(zext(lhs), zext(rhs))))
       unsigned ExtOpc = IsSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND;
-      SDValue LHS = DAG.getFreeze(Op.getOperand(0));
-      SDValue RHS = DAG.getFreeze(Op.getOperand(1));
-      LHS = DAG.getNode(ExtOpc, dl, WideVT, LHS);
-      RHS = DAG.getNode(ExtOpc, dl, WideVT, RHS);
+      SDValue LHS = DAG.getNode(ExtOpc, dl, WideVT, Op.getOperand(0));
+      SDValue RHS = DAG.getNode(ExtOpc, dl, WideVT, Op.getOperand(1));
       SDValue Diff = DAG.getNode(ISD::SUB, dl, WideVT, LHS, RHS);
       SDValue AbsDiff = DAG.getNode(ISD::ABS, dl, WideVT, Diff);
       return DAG.getNode(ISD::TRUNCATE, dl, VT, AbsDiff);