[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 01bfc9d916340d3c4cb76e1e80ec9290a5bed946..fe6c70dcc74911090510620b4158da49391287ef 100644
--- a/src/compiler/ppc/instruction-selector-ppc.cc
+++ b/src/compiler/ppc/instruction-selector-ppc.cc
@@ -947,6 +947,11 @@ 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);