Save/restore only live registers in the generator suspend/resume.

src/interpreter/bytecode-array-builder.h

Index: src/interpreter/bytecode-array-builder.h
diff --git a/src/interpreter/bytecode-array-builder.h b/src/interpreter/bytecode-array-builder.h
index 155fd24bab4953250cb6a6670523ae4be632c9bd..45c5f47772a52b379de47fc5d593a4e9b94d4929 100644
--- a/src/interpreter/bytecode-array-builder.h
+++ b/src/interpreter/bytecode-array-builder.h
@@ -401,8 +401,11 @@ class V8_EXPORT_PRIVATE BytecodeArrayBuilder final
 
   // Generators.
   BytecodeArrayBuilder& SuspendGenerator(Register generator,
+                                         RegisterList registers,
                                          SuspendFlags flags);
-  BytecodeArrayBuilder& ResumeGenerator(Register generator);
+  BytecodeArrayBuilder& RestoreGeneratorState(Register generator);
+  BytecodeArrayBuilder& RestoreGeneratorRegisters(Register generator,
+                                                  RegisterList registers);
 
   // Exception handling.
   BytecodeArrayBuilder& MarkHandler(int handler_id,