[interpreter] Bytecode register optimizer.

test/cctest/interpreter/bytecode_expectations/Generators.golden

 #
 # Autogenerated by generate-bytecode-expectations.
 #
 
 ---
 pool type: mixed
 execute: yes
 wrap: no
 test function name: f
 ignition generators: yes
 
 ---
 snippet: "
   function* f() { }
   f();
 "
 frame size: 11
 parameter count: 1
-bytecode array length: 199
+bytecode array length: 200
 bytecodes: [
                 B(Ldar), R(new_target),
                 B(JumpIfUndefined), U8(20),
                 B(ResumeGenerator), R(new_target),
                 B(Star), R(1),
                 B(LdaZero),
                 B(TestEqualStrict), R(1),
-                B(JumpIfTrue), U8(55),
+                B(JumpIfTrue), U8(56),
                 B(LdaSmi), U8(76),
                 B(Star), R(2),
                 B(CallRuntime), U16(Runtime::kAbort), R(2), U8(1),
                 B(CallRuntime), U16(Runtime::kNewFunctionContext), R(closure), U8(1),
                 B(PushContext), R(0),
                 B(Ldar), R(this),
                 B(StaContextSlot), R(context), U8(4),
   /*   11 E> */ B(StackCheck),
                 B(Mov), R(context), R(4),
-                B(Ldar), R(closure),
-                B(Star), R(5),
                 B(LdrContextSlot), R(context), U8(4), R(6),
+                B(Ldar), R(6),
+                B(Mov), R(closure), R(5),
                 B(CallRuntime), U16(Runtime::kCreateJSGeneratorObject), R(5), U8(2),
                 B(StaContextSlot), R(context), U8(5),
                 B(Star), R(5),
                 B(LdrContextSlot), R(context), U8(5), R(6),
                 B(LdaZero),
                 B(SuspendGenerator), R(6),
                 B(Ldar), R(5),
                 B(Return),
                 B(LdaSmi), U8(-2),
                 B(Star), R(1),
                 B(CallRuntime), U16(Runtime::k_GeneratorGetInput), R(6), U8(1),
                 B(Star), R(7),
                 B(CallRuntime), U16(Runtime::k_GeneratorGetResumeMode), R(6), U8(1),
                 B(Star), R(8),
                 B(LdaZero),
                 B(TestEqualStrict), R(8),
                 B(JumpIfTrue), U8(31),
                 B(LdaSmi), U8(2),
                 B(TestEqualStrict), R(8),
                 B(JumpIfTrue), U8(22),
                 B(Jump), U8(2),
-                B(Mov), R(7), R(9),
                 B(LdaTrue),
                 B(Star), R(10),
+                B(Mov), R(7), R(9),
                 B(CallRuntime), U16(Runtime::k_CreateIterResultObject), R(9), U8(2),
                 B(Star), R(3),
                 B(LdaZero),
                 B(Star), R(2),
                 B(Jump), U8(35),
                 B(Ldar), R(7),
                 B(Throw),
                 B(LdrUndefined), R(5),
                 B(LdaTrue),
                 B(Star), R(6),
@@ skipping 28 matching lines @@
                 B(Ldar), R(3),
   /*   16 S> */ B(Return),
                 B(Ldar), R(3),
                 B(ReThrow),
                 B(LdaUndefined),
   /*   16 S> */ B(Return),
 ]
 constant pool: [
 ]
 handlers: [
-  [38, 136, 142],
+  [38, 137, 143],
 ]
 
 ---
 snippet: "
   function* f() { yield 42 }
   f();
 "
 frame size: 11
 parameter count: 1
-bytecode array length: 292
+bytecode array length: 293
 bytecodes: [
                 B(Ldar), R(new_target),
                 B(JumpIfUndefined), U8(26),
                 B(ResumeGenerator), R(new_target),
                 B(Star), R(1),
                 B(LdaZero),
                 B(TestEqualStrict), R(1),
-                B(JumpIfTrue), U8(61),
+                B(JumpIfTrue), U8(62),
                 B(LdaSmi), U8(1),
                 B(TestEqualStrict), R(1),
                 B(JumpIfTrueConstant), U8(0),
                 B(LdaSmi), U8(76),
                 B(Star), R(2),
                 B(CallRuntime), U16(Runtime::kAbort), R(2), U8(1),
                 B(CallRuntime), U16(Runtime::kNewFunctionContext), R(closure), U8(1),
                 B(PushContext), R(0),
                 B(Ldar), R(this),
                 B(StaContextSlot), R(context), U8(4),
   /*   11 E> */ B(StackCheck),
                 B(Mov), R(context), R(4),
-                B(Ldar), R(closure),
-                B(Star), R(5),
                 B(LdrContextSlot), R(context), U8(4), R(6),
+                B(Ldar), R(6),
+                B(Mov), R(closure), R(5),
                 B(CallRuntime), U16(Runtime::kCreateJSGeneratorObject), R(5), U8(2),
                 B(StaContextSlot), R(context), U8(5),
                 B(Star), R(5),
                 B(LdrContextSlot), R(context), U8(5), R(6),
                 B(LdaZero),
                 B(SuspendGenerator), R(6),
                 B(Ldar), R(5),
                 B(Return),
                 B(LdaSmi), U8(-2),
                 B(Star), R(1),
                 B(CallRuntime), U16(Runtime::k_GeneratorGetInput), R(6), U8(1),
                 B(Star), R(7),
                 B(CallRuntime), U16(Runtime::k_GeneratorGetResumeMode), R(6), U8(1),
                 B(Star), R(8),
                 B(LdaZero),
                 B(TestEqualStrict), R(8),
                 B(JumpIfTrue), U8(31),
                 B(LdaSmi), U8(2),
                 B(TestEqualStrict), R(8),
                 B(JumpIfTrue), U8(22),
                 B(Jump), U8(2),
-                B(Mov), R(7), R(9),
                 B(LdaTrue),
                 B(Star), R(10),
+                B(Mov), R(7), R(9),
                 B(CallRuntime), U16(Runtime::k_CreateIterResultObject), R(9), U8(2),
                 B(Star), R(3),
                 B(LdaZero),
                 B(Star), R(2),
                 B(Jump), U8(113),
                 B(Ldar), R(7),
                 B(Throw),
   /*   16 S> */ B(LdaSmi), U8(42),
                 B(Star), R(5),
                 B(LdaFalse),
@@ skipping 11 matching lines @@
                 B(Star), R(6),
                 B(CallRuntime), U16(Runtime::k_GeneratorGetResumeMode), R(5), U8(1),
                 B(Star), R(8),
                 B(LdaZero),
                 B(TestEqualStrict), R(8),
                 B(JumpIfTrue), U8(32),
                 B(LdaSmi), U8(2),
                 B(TestEqualStrict), R(8),
                 B(JumpIfTrue), U8(23),
                 B(Jump), U8(2),
-                B(Mov), R(6), R(9),
                 B(LdaTrue),
                 B(Star), R(10),
+                B(Mov), R(6), R(9),
                 B(CallRuntime), U16(Runtime::k_CreateIterResultObject), R(9), U8(2),
                 B(Star), R(3),
                 B(LdaSmi), U8(1),
                 B(Star), R(2),
                 B(Jump), U8(35),
                 B(Ldar), R(6),
                 B(Throw),
                 B(LdrUndefined), R(5),
                 B(LdaTrue),
                 B(Star), R(6),
@@ skipping 34 matching lines @@
   /*   25 S> */ B(Return),
                 B(Ldar), R(3),
                 B(ReThrow),
                 B(LdaUndefined),
   /*   25 S> */ B(Return),
 ]
 constant pool: [
   kInstanceTypeDontCare,
 ]
 handlers: [
-  [44, 220, 226],
+  [44, 221, 227],
 ]
 
 ---
 snippet: "
   function* f() { for (let x of [42]) yield x }
   f();
 "
 frame size: 17
 parameter count: 1
-bytecode array length: 784
+bytecode array length: 779
 bytecodes: [
                 B(Ldar), R(new_target),
                 B(JumpIfUndefined), U8(26),
                 B(ResumeGenerator), R(new_target),
                 B(Star), R(3),
                 B(LdaZero),
                 B(TestEqualStrict), R(3),
-                B(JumpIfTrue), U8(61),
+                B(JumpIfTrue), U8(62),
                 B(LdaSmi), U8(1),
                 B(TestEqualStrict), R(3),
                 B(JumpIfTrueConstant), U8(3),
                 B(LdaSmi), U8(76),
                 B(Star), R(4),
                 B(CallRuntime), U16(Runtime::kAbort), R(4), U8(1),
                 B(CallRuntime), U16(Runtime::kNewFunctionContext), R(closure), U8(1),
                 B(PushContext), R(0),
                 B(Ldar), R(this),
                 B(StaContextSlot), R(context), U8(4),
   /*   11 E> */ B(StackCheck),
                 B(Mov), R(context), R(6),
-                B(Ldar), R(closure),
-                B(Star), R(7),
                 B(LdrContextSlot), R(context), U8(4), R(8),
+                B(Ldar), R(8),
+                B(Mov), R(closure), R(7),
                 B(CallRuntime), U16(Runtime::kCreateJSGeneratorObject), R(7), U8(2),
                 B(StaContextSlot), R(context), U8(5),
                 B(Star), R(7),
                 B(LdrContextSlot), R(context), U8(5), R(8),
                 B(LdaZero),
                 B(SuspendGenerator), R(8),
                 B(Ldar), R(7),
                 B(Return),
                 B(LdaSmi), U8(-2),
                 B(Star), R(3),
                 B(CallRuntime), U16(Runtime::k_GeneratorGetInput), R(8), U8(1),
                 B(Star), R(9),
                 B(CallRuntime), U16(Runtime::k_GeneratorGetResumeMode), R(8), U8(1),
                 B(Star), R(10),
                 B(LdaZero),
                 B(TestEqualStrict), R(10),
                 B(JumpIfTrue), U8(31),
                 B(LdaSmi), U8(2),
                 B(TestEqualStrict), R(10),
                 B(JumpIfTrue), U8(22),
                 B(Jump), U8(2),
-                B(Mov), R(9), R(11),
                 B(LdaTrue),
                 B(Star), R(12),
+                B(Mov), R(9), R(11),
                 B(CallRuntime), U16(Runtime::k_CreateIterResultObject), R(11), U8(2),
                 B(Star), R(5),
                 B(LdaZero),
                 B(Star), R(4),
-                B(JumpConstant), U8(17),
+                B(JumpConstant), U8(16),
                 B(Ldar), R(9),
                 B(Throw),
                 B(LdaConstant), U8(0),
                 B(Star), R(7),
-                B(Ldar), R(closure),
-                B(Star), R(8),
+                B(Mov), R(closure), R(8),
                 B(CallRuntime), U16(Runtime::kPushBlockContext), R(7), U8(2),
                 B(PushContext), R(1),
                 B(LdaTheHole),
                 B(StaContextSlot), R(context), U8(4),
                 B(LdaUndefined),
                 B(StaContextSlot), R(1), U8(10),
                 B(LdaZero),
                 B(StaContextSlot), R(1), U8(9),
                 B(Mov), R(context), R(9),
                 B(Mov), R(context), R(10),
@@ skipping 27 matching lines @@
                 B(JumpIfToBooleanTrueConstant), U8(10),
                 B(LdaSmi), U8(2),
                 B(StaContextSlot), R(1), U8(9),
                 B(LdrContextSlot), R(1), U8(8), R(11),
                 B(LdaNamedProperty), R(11), U8(6), U8(11),
                 B(StaContextSlot), R(1), U8(6),
                 B(LdaContextSlot), R(1), U8(10),
   /*   16 E> */ B(StackCheck),
                 B(LdaConstant), U8(7),
                 B(Star), R(11),
-                B(Ldar), R(closure),
-                B(Star), R(12),
+                B(Mov), R(closure), R(12),
                 B(CallRuntime), U16(Runtime::kPushBlockContext), R(11), U8(2),
                 B(PushContext), R(2),
                 B(LdaTheHole),
                 B(StaContextSlot), R(context), U8(4),
                 B(LdaContextSlot), R(1), U8(6),
                 B(StaContextSlot), R(context), U8(4),
   /*   36 S> */ B(LdaContextSlot), R(context), U8(4),
                 B(JumpIfNotHole), U8(11),
                 B(LdaConstant), U8(8),
                 B(Star), R(12),
@@ skipping 14 matching lines @@
                 B(Star), R(12),
                 B(CallRuntime), U16(Runtime::k_GeneratorGetResumeMode), R(11), U8(1),
                 B(Star), R(14),
                 B(LdaZero),
                 B(TestEqualStrict), R(14),
                 B(JumpIfTrue), U8(45),
                 B(LdaSmi), U8(2),
                 B(TestEqualStrict), R(14),
                 B(JumpIfTrue), U8(36),
                 B(Jump), U8(2),
-                B(Mov), R(12), R(15),
                 B(LdaTrue),
                 B(Star), R(16),
+                B(Mov), R(12), R(15),
                 B(CallRuntime), U16(Runtime::k_CreateIterResultObject), R(15), U8(2),
                 B(PopContext), R(2),
                 B(PopContext), R(2),
                 B(PopContext), R(2),
                 B(PopContext), R(2),
                 B(PopContext), R(2),
                 B(PopContext), R(2),
                 B(PopContext), R(2),
                 B(Star), R(8),
                 B(LdaZero),
                 B(Star), R(7),
-                B(Jump), U8(76),
+                B(Jump), U8(75),
                 B(Ldar), R(12),
                 B(Throw),
                 B(Ldar), R(12),
                 B(PopContext), R(2),
                 B(LdaZero),
                 B(StaContextSlot), R(1), U8(9),
-                B(Wide), B(Jump), U16(-224),
-                B(Jump), U8(47),
+                B(Wide), B(Jump), U16(-223),
+                B(Jump), U8(46),
                 B(Star), R(12),
                 B(LdaConstant), U8(11),
                 B(Star), R(11),
-                B(Ldar), R(closure),
-                B(Star), R(13),
+                B(Mov), R(closure), R(13),
                 B(CallRuntime), U16(Runtime::kPushCatchContext), R(11), U8(3),
                 B(Star), R(10),
                 B(PushContext), R(2),
                 B(LdrContextSlot), R(1), U8(9), R(11),
                 B(LdaSmi), U8(2),
                 B(TestEqualStrict), R(11),
                 B(JumpIfFalse), U8(7),
                 B(LdaSmi), U8(1),
                 B(StaContextSlot), R(1), U8(9),
                 B(LdrContextSlot), R(context), U8(4), R(11),
                 B(CallRuntime), U16(Runtime::kReThrow), R(11), U8(1),
                 B(PopContext), R(2),
                 B(LdaSmi), U8(-1),
                 B(Star), R(7),
                 B(Jump), U8(8),
                 B(Star), R(8),
                 B(LdaSmi), U8(1),
                 B(Star), R(7),
                 B(CallRuntime), U16(Runtime::kInterpreterClearPendingMessage), R(0), U8(0),
                 B(Star), R(9),
                 B(LdrContextSlot), R(1), U8(9), R(10),
                 B(LdaZero),
                 B(TestEqualStrict), R(10),
                 B(JumpIfTrue), U8(9),
                 B(LdrContextSlot), R(1), U8(7), R(10),
                 B(LdaUndefined),
                 B(TestEqualStrict), R(10),
                 B(ToBooleanLogicalNot),
-                B(JumpIfFalseConstant), U8(16),
+                B(JumpIfFalseConstant), U8(15),
                 B(LdrContextSlot), R(1), U8(7), R(10),
                 B(LdaNamedProperty), R(10), U8(12), U8(13),
                 B(StaContextSlot), R(1), U8(11),
                 B(LdrContextSlot), R(1), U8(11), R(10),
                 B(LdaNull),
                 B(TestEqual), R(10),
                 B(JumpIfFalse), U8(4),
-                B(JumpConstant), U8(15),
+                B(Jump), U8(127),
                 B(LdrContextSlot), R(1), U8(9), R(10),
                 B(LdaSmi), U8(1),
                 B(TestEqualStrict), R(10),
-                B(JumpIfFalse), U8(80),
+                B(JumpIfFalse), U8(79),
                 B(LdaContextSlot), R(1), U8(11),
                 B(TypeOf),
                 B(Star), R(10),
                 B(LdaConstant), U8(13),
                 B(TestEqualStrict), R(10),
                 B(JumpIfFalse), U8(4),
                 B(Jump), U8(18),
                 B(Wide), B(LdaSmi), U16(129),
                 B(Star), R(10),
                 B(LdaConstant), U8(14),
                 B(Star), R(11),
                 B(CallRuntime), U16(Runtime::kNewTypeError), R(10), U8(2),
                 B(Throw),
                 B(Mov), R(context), R(10),
                 B(LdrContextSlot), R(1), U8(11), R(11),
                 B(LdrContextSlot), R(1), U8(7), R(12),
                 B(CallRuntime), U16(Runtime::k_Call), R(11), U8(2),
-                B(Jump), U8(30),
+                B(Jump), U8(29),
                 B(Star), R(12),
                 B(LdaConstant), U8(11),
                 B(Star), R(11),
-                B(Ldar), R(closure),
-                B(Star), R(13),
+                B(Mov), R(closure), R(13),
                 B(CallRuntime), U16(Runtime::kPushCatchContext), R(11), U8(3),
                 B(Star), R(10),
                 B(CallRuntime), U16(Runtime::kInterpreterClearPendingMessage), R(0), U8(0),
                 B(Ldar), R(10),
                 B(PushContext), R(2),
                 B(PopContext), R(2),
                 B(Jump), U8(40),
                 B(LdrContextSlot), R(1), U8(11), R(10),
                 B(LdrContextSlot), R(1), U8(7), R(11),
                 B(CallRuntime), U16(Runtime::k_Call), R(10), U8(2),
                 B(StaContextSlot), R(1), U8(12),
                 B(LdrContextSlot), R(1), U8(12), R(10),
                 B(InvokeIntrinsic), U16(Runtime::k_IsJSReceiver), R(10), U8(1),
                 B(JumpIfToBooleanFalse), U8(4),
                 B(Jump), U8(11),
                 B(LdrContextSlot), R(1), U8(12), R(10),
                 B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(10), U8(1),
                 B(CallRuntime), U16(Runtime::kInterpreterSetPendingMessage), R(9), U8(1),
                 B(LdaZero),
                 B(TestEqualStrict), R(7),
                 B(JumpIfTrue), U8(10),
                 B(LdaSmi), U8(1),
                 B(TestEqualStrict), R(7),
-                B(JumpIfTrue), U8(18),
-                B(Jump), U8(30),
-                B(Ldar), R(8),
+                B(JumpIfTrue), U8(17),
+                B(Jump), U8(28),
                 B(PopContext), R(1),
                 B(PopContext), R(1),
-                B(Star), R(5),
                 B(LdaSmi), U8(1),
                 B(Star), R(4),
-                B(Jump), U8(48),
-                B(Ldar), R(8),
+                B(Mov), R(8), R(5),
+                B(Jump), U8(47),
                 B(PopContext), R(1),
                 B(PopContext), R(1),
-                B(Star), R(5),
                 B(LdaSmi), U8(2),
                 B(Star), R(4),
+                B(Mov), R(8), R(5),
                 B(Jump), U8(34),
                 B(PopContext), R(1),
                 B(LdrUndefined), R(7),
                 B(LdaTrue),
                 B(Star), R(8),
                 B(CallRuntime), U16(Runtime::k_CreateIterResultObject), R(7), U8(2),
                 B(Star), R(5),
                 B(LdaSmi), U8(3),
                 B(Star), R(4),
                 B(Jump), U8(14),
@@ skipping 48 matching lines @@
   InstanceType::FIXED_ARRAY_TYPE,
   InstanceType::ONE_BYTE_INTERNALIZED_STRING_TYPE,
   kInstanceTypeDontCare,
   kInstanceTypeDontCare,
   InstanceType::ONE_BYTE_INTERNALIZED_STRING_TYPE,
   InstanceType::ONE_BYTE_INTERNALIZED_STRING_TYPE,
   InstanceType::ONE_BYTE_INTERNALIZED_STRING_TYPE,
   InstanceType::ONE_BYTE_INTERNALIZED_STRING_TYPE,
   kInstanceTypeDontCare,
   kInstanceTypeDontCare,
-  kInstanceTypeDontCare,
 ]
 handlers: [
-  [44, 703, 709],
-  [154, 451, 457],
-  [157, 404, 406],
-  [554, 567, 569],
+  [44, 698, 704],
+  [154, 449, 455],
+  [157, 403, 405],
+  [552, 565, 567],
 ]