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

src/interpreter/bytecodes.h

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_INTERPRETER_BYTECODES_H_
 #define V8_INTERPRETER_BYTECODES_H_
 
 #include <cstdint>
 #include <iosfwd>
 #include <string>
@@ skipping 297 matching lines @@
                                                                                \
   /* Update the pending message */                                             \
   V(SetPendingMessage, AccumulatorUse::kReadWrite)                             \
                                                                                \
   /* Non-local flow control */                                                 \
   V(Throw, AccumulatorUse::kRead)                                              \
   V(ReThrow, AccumulatorUse::kRead)                                            \
   V(Return, AccumulatorUse::kRead)                                             \
                                                                                \
   /* Generators */                                                             \
+  V(RestoreGeneratorState, AccumulatorUse::kWrite, OperandType::kReg)          \
   V(SuspendGenerator, AccumulatorUse::kRead, OperandType::kReg,                \
-    OperandType::kFlag8)                                                       \
-  V(ResumeGenerator, AccumulatorUse::kWrite, OperandType::kReg)                \
+    OperandType::kRegList, OperandType::kRegCount, OperandType::kFlag8)        \
+  V(RestoreGeneratorRegisters, AccumulatorUse::kNone, OperandType::kReg,       \
+    OperandType::kRegOutList, OperandType::kRegCount)                          \
                                                                                \
   /* Debugger */                                                               \
   V(Debugger, AccumulatorUse::kNone)                                           \
                                                                                \
   /* Debug Breakpoints - one for each possible size of unscaled bytecodes */   \
   /* and one for each operand widening prefix bytecode                    */   \
   V(DebugBreak0, AccumulatorUse::kRead)                                        \
   V(DebugBreak1, AccumulatorUse::kRead, OperandType::kReg)                     \
   V(DebugBreak2, AccumulatorUse::kRead, OperandType::kReg, OperandType::kReg)  \
   V(DebugBreak3, AccumulatorUse::kRead, OperandType::kReg, OperandType::kReg,  \
@@ skipping 483 matching lines @@
     switch (operand_type) {
       case OperandType::kReg:
       case OperandType::kRegOut:
         return 1;
       case OperandType::kRegPair:
       case OperandType::kRegOutPair:
         return 2;
       case OperandType::kRegOutTriple:
         return 3;
       case OperandType::kRegList:
+      case OperandType::kRegOutList:
         UNREACHABLE();
       default:
         return 0;
     }
     UNREACHABLE();
   }
 
   // Returns the size of |operand| for |operand_scale|.
   static OperandSize SizeOfOperand(OperandType operand, OperandScale scale);
 
@@ skipping 54 matching lines @@
 };
 
 V8_EXPORT_PRIVATE std::ostream& operator<<(std::ostream& os,
                                            const Bytecode& bytecode);
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_INTERPRETER_BYTECODES_H_