[interpreter] Bytecode register optimizer.

test/cctest/interpreter/bytecode_expectations/ClassDeclarations.golden

 #
 # Autogenerated by generate-bytecode-expectations.
 #
 
 ---
 pool type: mixed
 execute: yes
 wrap: yes
 
 ---
 snippet: "
   class Person {
     constructor(name) { this.name = name; }
     speak() { console.log(this.name + ' is speaking.'); }
   }
 "
 frame size: 9
 parameter count: 1
-bytecode array length: 74
+bytecode array length: 73
 bytecodes: [
                 B(LdaTheHole),
                 B(Star), R(1),
   /*   30 E> */ B(StackCheck),
                 B(LdaTheHole),
                 B(Star), R(0),
                 B(LdaTheHole),
                 B(Star), R(2),
                 B(CreateClosure), U8(0), U8(0),
                 B(Star), R(3),
                 B(LdaSmi), U8(34),
                 B(Star), R(4),
                 B(Wide), B(LdaSmi), U16(148),
                 B(Star), R(5),
                 B(CallRuntime), U16(Runtime::kDefineClass), R(2), U8(4),
                 B(Star), R(2),
-                B(LdrNamedProperty), R(2), U8(1), U8(1), R(3),
-                B(Ldar), R(3),
-                B(Mov), R(3), R(4),
+                B(LdaNamedProperty), R(2), U8(1), U8(1),
+                B(Star), R(3),
                 B(LdaConstant), U8(2),
                 B(Star), R(5),
                 B(CreateClosure), U8(3), U8(0),
                 B(Star), R(6),
                 B(LdaSmi), U8(2),
                 B(Star), R(7),
                 B(LdaZero),
                 B(Star), R(8),
+                B(Mov), R(3), R(4),
                 B(CallRuntime), U16(Runtime::kDefineDataPropertyInLiteral), R(4), U8(5),
                 B(CallRuntime), U16(Runtime::kToFastProperties), R(2), U8(1),
                 B(Star), R(0),
   /*   34 E> */ B(Star), R(1),
                 B(LdaUndefined),
   /*  149 S> */ B(Return),
 ]
 constant pool: [
   InstanceType::SHARED_FUNCTION_INFO_TYPE,
   InstanceType::ONE_BYTE_INTERNALIZED_STRING_TYPE,
   InstanceType::ONE_BYTE_INTERNALIZED_STRING_TYPE,
   InstanceType::SHARED_FUNCTION_INFO_TYPE,
 ]
 handlers: [
 ]
 
 ---
 snippet: "
   class person {
     constructor(name) { this.name = name; }
     speak() { console.log(this.name + ' is speaking.'); }
   }
 "
 frame size: 9
 parameter count: 1
-bytecode array length: 74
+bytecode array length: 73
 bytecodes: [
                 B(LdaTheHole),
                 B(Star), R(1),
   /*   30 E> */ B(StackCheck),
                 B(LdaTheHole),
                 B(Star), R(0),
                 B(LdaTheHole),
                 B(Star), R(2),
                 B(CreateClosure), U8(0), U8(0),
                 B(Star), R(3),
                 B(LdaSmi), U8(34),
                 B(Star), R(4),
                 B(Wide), B(LdaSmi), U16(148),
                 B(Star), R(5),
                 B(CallRuntime), U16(Runtime::kDefineClass), R(2), U8(4),
                 B(Star), R(2),
-                B(LdrNamedProperty), R(2), U8(1), U8(1), R(3),
-                B(Ldar), R(3),
-                B(Mov), R(3), R(4),
+                B(LdaNamedProperty), R(2), U8(1), U8(1),
+                B(Star), R(3),
                 B(LdaConstant), U8(2),
                 B(Star), R(5),
                 B(CreateClosure), U8(3), U8(0),
                 B(Star), R(6),
                 B(LdaSmi), U8(2),
                 B(Star), R(7),
                 B(LdaZero),
                 B(Star), R(8),
+                B(Mov), R(3), R(4),
                 B(CallRuntime), U16(Runtime::kDefineDataPropertyInLiteral), R(4), U8(5),
                 B(CallRuntime), U16(Runtime::kToFastProperties), R(2), U8(1),
                 B(Star), R(0),
   /*   34 E> */ B(Star), R(1),
                 B(LdaUndefined),
   /*  149 S> */ B(Return),
 ]
 constant pool: [
   InstanceType::SHARED_FUNCTION_INFO_TYPE,
   InstanceType::ONE_BYTE_INTERNALIZED_STRING_TYPE,
   InstanceType::ONE_BYTE_INTERNALIZED_STRING_TYPE,
   InstanceType::SHARED_FUNCTION_INFO_TYPE,
 ]
 handlers: [
 ]
 
 ---
 snippet: "
   var n0 = 'a';
   var n1 = 'b';
   class N {
     [n0]() { return n0; }
     static [n1]() { return n1; }
   }
 "
 frame size: 10
 parameter count: 1
-bytecode array length: 128
+bytecode array length: 127
 bytecodes: [
                 B(CallRuntime), U16(Runtime::kNewFunctionContext), R(closure), U8(1),
                 B(PushContext), R(2),
                 B(LdaTheHole),
                 B(Star), R(1),
   /*   30 E> */ B(StackCheck),
   /*   43 S> */ B(LdaConstant), U8(0),
   /*   43 E> */ B(StaContextSlot), R(context), U8(4),
   /*   57 S> */ B(LdaConstant), U8(1),
   /*   57 E> */ B(StaContextSlot), R(context), U8(5),
                 B(LdaTheHole),
                 B(Star), R(0),
                 B(LdaTheHole),
                 B(Star), R(3),
                 B(CreateClosure), U8(2), U8(0),
                 B(Star), R(4),
                 B(LdaSmi), U8(62),
                 B(Star), R(5),
                 B(Wide), B(LdaSmi), U16(128),
                 B(Star), R(6),
                 B(CallRuntime), U16(Runtime::kDefineClass), R(3), U8(4),
                 B(Star), R(3),
-                B(LdrNamedProperty), R(3), U8(3), U8(1), R(4),
-                B(Ldar), R(4),
-                B(Mov), R(4), R(5),
+                B(LdaNamedProperty), R(3), U8(3), U8(1),
+                B(Star), R(4),
   /*   75 E> */ B(LdaContextSlot), R(context), U8(4),
                 B(ToName),
                 B(Star), R(6),
                 B(CreateClosure), U8(4), U8(0),
                 B(Star), R(7),
                 B(LdaSmi), U8(2),
                 B(Star), R(8),
                 B(LdaSmi), U8(1),
                 B(Star), R(9),
+                B(Mov), R(4), R(5),
                 B(CallRuntime), U16(Runtime::kDefineDataPropertyInLiteral), R(5), U8(5),
-                B(Mov), R(3), R(5),
   /*  106 E> */ B(LdaContextSlot), R(context), U8(5),
                 B(ToName),
                 B(Star), R(6),
                 B(LdaConstant), U8(3),
                 B(TestEqualStrict), R(6),
-                B(JumpIfFalse), U8(7),
+                B(Mov), R(3), R(5),
+                B(JumpIfToBooleanFalse), U8(7),
                 B(CallRuntime), U16(Runtime::kThrowStaticPrototypeError), R(0), U8(0),
                 B(CreateClosure), U8(5), U8(0),
                 B(Star), R(7),
                 B(LdaSmi), U8(1),
                 B(Star), R(9),
                 B(CallRuntime), U16(Runtime::kDefineDataPropertyInLiteral), R(5), U8(5),
                 B(CallRuntime), U16(Runtime::kToFastProperties), R(3), U8(1),
                 B(Star), R(0),
   /*   62 E> */ B(Star), R(1),
                 B(LdaUndefined),
@@ skipping 11 matching lines @@
 ]
 
 ---
 snippet: "
   var count = 0;
   class C { constructor() { count++; }}
   return new C();
 "
 frame size: 7
 parameter count: 1
-bytecode array length: 73
+bytecode array length: 74
 bytecodes: [
                 B(CallRuntime), U16(Runtime::kNewFunctionContext), R(closure), U8(1),
                 B(PushContext), R(2),
                 B(LdaTheHole),
                 B(Star), R(1),
   /*   30 E> */ B(StackCheck),
   /*   46 S> */ B(LdaZero),
   /*   46 E> */ B(StaContextSlot), R(context), U8(4),
                 B(LdaTheHole),
                 B(Star), R(0),
                 B(LdaTheHole),
                 B(Star), R(3),
                 B(CreateClosure), U8(0), U8(0),
                 B(Star), R(4),
                 B(LdaSmi), U8(49),
                 B(Star), R(5),
                 B(LdaSmi), U8(86),
                 B(Star), R(6),
                 B(CallRuntime), U16(Runtime::kDefineClass), R(3), U8(4),
                 B(Star), R(3),
-                B(LdrNamedProperty), R(3), U8(1), U8(1), R(4),
+                B(LdaNamedProperty), R(3), U8(1), U8(1),
+                B(Star), R(4),
                 B(CallRuntime), U16(Runtime::kToFastProperties), R(3), U8(1),
                 B(Star), R(0),
                 B(Star), R(1),
   /*   87 S> */ B(JumpIfNotHole), U8(11),
                 B(LdaConstant), U8(2),
                 B(Star), R(4),
                 B(CallRuntime), U16(Runtime::kThrowReferenceError), R(4), U8(1),
-                B(Star), R(3),
-  /*   94 E> */ B(New), R(3), R(0), U8(0),
+  /*   94 E> */ B(Star), R(3),
+                B(New), R(3), R(0), U8(0),
   /*  103 S> */ B(Return),
 ]
 constant pool: [
   InstanceType::SHARED_FUNCTION_INFO_TYPE,
   InstanceType::ONE_BYTE_INTERNALIZED_STRING_TYPE,
   InstanceType::ONE_BYTE_INTERNALIZED_STRING_TYPE,
 ]
 handlers: [
 ]