[compiler] [wasm] Introduce Word32/64ReverseBytes as TF Optional Opcode

src/compiler/ppc/instruction-selector-ppc.cc

Index: src/compiler/ppc/instruction-selector-ppc.cc
diff --git a/src/compiler/ppc/instruction-selector-ppc.cc b/src/compiler/ppc/instruction-selector-ppc.cc
index 8fbd69c0ee57a7d587db4d4c3de128d0a948bd74..026bb7dd10d7f5106a259a2fec1a1024926d5029 100644
--- a/src/compiler/ppc/instruction-selector-ppc.cc
+++ b/src/compiler/ppc/instruction-selector-ppc.cc
@@ -954,6 +954,11 @@ void InstructionSelector::VisitWord32ReverseBits(Node* node) { UNREACHABLE(); }
 void InstructionSelector::VisitWord64ReverseBits(Node* node) { UNREACHABLE(); }
 #endif
 
+void InstructionSelector::VisitWord64ReverseBytes(Node* node) { UNREACHABLE(); }
+
+void InstructionSelector::VisitWord32ReverseBytes(Node* node) { UNREACHABLE(); }
+
+void InstructionSelector::VisitWord16ReverseBytes(Node* node) { UNREACHABLE(); }
 
 void InstructionSelector::VisitInt32Add(Node* node) {
   VisitBinop<Int32BinopMatcher>(this, node, kPPC_Add, kInt16Imm);