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

src/interpreter/bytecode-array-builder.cc

Index: src/interpreter/bytecode-array-builder.cc
diff --git a/src/interpreter/bytecode-array-builder.cc b/src/interpreter/bytecode-array-builder.cc
index 11b1267172f8d6b780b52afaf19e959d3535d359..192421c1cbc3fd55b6e0d83d67054baa783d5924 100644
--- a/src/interpreter/bytecode-array-builder.cc
+++ b/src/interpreter/bytecode-array-builder.cc
@@ -262,6 +262,15 @@ class OperandHelper<OperandType::kRegOut> {
 };
 
 template <>
+class OperandHelper<OperandType::kRegOutList> {
+ public:
+  INLINE(static uint32_t Convert(BytecodeArrayBuilder* builder,
+                                 RegisterList reg_list)) {
+    return builder->GetOutputRegisterListOperand(reg_list);
+  }
+};
+
+template <>
 class OperandHelper<OperandType::kRegOutPair> {
  public:
   INLINE(static uint32_t Convert(BytecodeArrayBuilder* builder,
@@ -1235,8 +1244,8 @@ BytecodeArrayBuilder& BytecodeArrayBuilder::LoadModuleVariable(int cell_index,
 }
 
 BytecodeArrayBuilder& BytecodeArrayBuilder::SuspendGenerator(
-    Register generator, SuspendFlags flags) {
-  OutputSuspendGenerator(generator,
+    Register generator, RegisterList registers, SuspendFlags flags) {
+  OutputSuspendGenerator(generator, registers, registers.register_count(),
                          SuspendGeneratorBytecodeFlags::Encode(flags));
   return *this;
 }
@@ -1247,6 +1256,13 @@ BytecodeArrayBuilder& BytecodeArrayBuilder::ResumeGenerator(
   return *this;
 }
 
+BytecodeArrayBuilder& BytecodeArrayBuilder::RestoreGeneratorRegisters(
+    Register generator, RegisterList registers) {
+  OutputRestoreGeneratorRegisters(generator, registers,
+                                  registers.register_count());
+  return *this;
+}
+
 BytecodeArrayBuilder& BytecodeArrayBuilder::MarkHandler(
     int handler_id, HandlerTable::CatchPrediction catch_prediction) {
   BytecodeLabel handler;