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

src/interpreter/bytecode-register-optimizer.h

Index: src/interpreter/bytecode-register-optimizer.h
diff --git a/src/interpreter/bytecode-register-optimizer.h b/src/interpreter/bytecode-register-optimizer.h
index 494abb6c96c9e8b7fec2fe5beb530d86cb675f8f..3ec2c657d0a036e42ce3c54df7220ab2763b0488 100644
--- a/src/interpreter/bytecode-register-optimizer.h
+++ b/src/interpreter/bytecode-register-optimizer.h
@@ -67,7 +67,7 @@ class V8_EXPORT_PRIVATE BytecodeRegisterOptimizer final
     if (Bytecodes::IsJump(bytecode) || Bytecodes::IsSwitch(bytecode) ||
         bytecode == Bytecode::kDebugger ||
         bytecode == Bytecode::kSuspendGenerator ||
-        bytecode == Bytecode::kResumeGenerator) {
+        bytecode == Bytecode::kRestoreGeneratorRegisters) {
       // All state must be flushed before emitting
       // - a jump bytecode (as the register equivalents at the jump target
       //   aren't known)
@@ -75,7 +75,7 @@ class V8_EXPORT_PRIVATE BytecodeRegisterOptimizer final
       //   aren't known)
       // - a call to the debugger (as it can manipulate locals and parameters),
       // - a generator suspend (as this involves saving all registers).
-      // - a generator resume (as this involves restoring all registers).
+      // - a generator register restore.
       Flush();
     }