Dummy impls for unsupported platforms

src/hotspot/cpu/arm/c1_CodeStubs_arm.cpp

@@ -217,6 +217,10 @@ void MonitorExitStub::emit_code(LIR_Assembler* ce) {
   __ b(_continuation);
 }
 
+void LoadKlassStub::emit_code(LIR_Assembler* ce) {
+  // Currently not needed.
+  Unimplemented();
+}
 
 // Call return is directly after patch word
 int PatchingStub::_patch_info_offset = 0;

src/hotspot/cpu/ppc/c1_CodeStubs_ppc.cpp

@@ -298,6 +298,10 @@ void MonitorExitStub::emit_code(LIR_Assembler* ce) {
   __ b(_continuation);
 }
 
+void LoadKlassStub::emit_code(LIR_Assembler* ce) {
+  // Currently not needed.
+  Unimplemented();
+}
 
 // Implementation of patching:
 // - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes).

src/hotspot/cpu/riscv/c1_CodeStubs_riscv.cpp

@@ -228,6 +228,11 @@ void MonitorExitStub::emit_code(LIR_Assembler* ce) {
   __ far_jump(RuntimeAddress(Runtime1::entry_for(exit_id)));
 }
 
+void LoadKlassStub::emit_code(LIR_Assembler* ce) {
+  // Currently not needed.
+  Unimplemented();
+}
+
 // Implementation of patching:
 // - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes)
 // - Replace original code with a call to the stub

src/hotspot/cpu/s390/c1_CodeStubs_s390.cpp

@@ -253,6 +253,11 @@ void MonitorExitStub::emit_code(LIR_Assembler* ce) {
   __ branch_optimized(Assembler::bcondAlways, _continuation);
 }
 
+void LoadKlassStub::emit_code(LIR_Assembler* ce) {
+  // Currently not needed.
+  Unimplemented();
+}
+
 // Implementation of patching:
 // - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes).
 // - Replace original code with a call to the stub.

src/hotspot/share/c1/c1_CodeStubs.hpp

@@ -581,6 +581,7 @@ class ArrayCopyStub: public CodeStub {
 #endif // PRODUCT
 };
 
+#if define(AARCH64) || defined(X86)
 class LoadKlassStub: public CodeStub {
 private:
   LIR_Opr          _result;
@@ -598,5 +599,6 @@ class LoadKlassStub: public CodeStub {
   virtual void print_name(outputStream* out) const { out->print("LoadKlassStub"); }
 #endif // PRODUCT
 };
+#endif
 
 #endif // SHARE_C1_C1_CODESTUBS_HPP