[X86] combineConcatVectorOps - use all_of to check for matching PSHUFD/PSHUFLW/PSHUFHW shuffle mask.

Prep work before adding 512-bit support.

Author: RKSimon

llvm/lib/Target/X86/X86ISelLowering.cpp

@@ -58044,7 +58044,9 @@ static SDValue combineConcatVectorOps(const SDLoc &DL, MVT VT,
     case X86ISD::PSHUFLW:
     case X86ISD::PSHUFD:
       if (!IsSplat && NumOps == 2 && VT.is256BitVector() &&
-          Subtarget.hasInt256() && Op0.getOperand(1) == Ops[1].getOperand(1)) {
+          Subtarget.hasInt256() && llvm::all_of(Ops, [Op0](SDValue Op) {
+            return Op.getOperand(1) == Op0.getOperand(1);
+          })) {
         return DAG.getNode(Op0.getOpcode(), DL, VT,
                            ConcatSubOperand(VT, Ops, 0), Op0.getOperand(1));
       }