[stubs] Reduce number of StoreTransitionStub instances.

src/ic/arm64/handler-compiler-arm64.cc

Index: src/ic/arm64/handler-compiler-arm64.cc
diff --git a/src/ic/arm64/handler-compiler-arm64.cc b/src/ic/arm64/handler-compiler-arm64.cc
index 851b32598a271b6a9518e6fda0a1605f3395fdfc..3f97fddcd5d22d0811ffd27d3a7abd0cb3d2ed4c 100644
--- a/src/ic/arm64/handler-compiler-arm64.cc
+++ b/src/ic/arm64/handler-compiler-arm64.cc
@@ -44,9 +44,13 @@ void PropertyHandlerCompiler::DiscardVectorAndSlot() {
   __ Drop(2);
 }
 
-void PropertyHandlerCompiler::PushReturnAddress(Register tmp) { UNREACHABLE(); }
+void PropertyHandlerCompiler::PushReturnAddress(Register tmp) {
+  // No-op. Return address is in lr register.
+}
 
-void PropertyHandlerCompiler::PopReturnAddress(Register tmp) { UNREACHABLE(); }
+void PropertyHandlerCompiler::PopReturnAddress(Register tmp) {
+  // No-op. Return address is in lr register.
+}
 
 void PropertyHandlerCompiler::GenerateDictionaryNegativeLookup(
     MacroAssembler* masm, Label* miss_label, Register receiver,