[Interpreter] Replace BytecodeRegisterAllocator with a simple bump pointer.

test/cctest/interpreter/bytecode_expectations/Generators.golden

 #
 # Autogenerated by generate-bytecode-expectations.
 #
 
 ---
 execute: yes
 wrap: no
 test function name: f
 
 ---
@@ skipping 163 matching lines @@
                 B(LdaZero),
                 B(Star), R(2),
                 B(Jump), U8(116),
                 B(Ldar), R(7),
   /*   11 E> */ B(Throw),
   /*   16 S> */ B(LdaSmi), U8(42),
                 B(Star), R(5),
                 B(LdaFalse),
                 B(Star), R(6),
                 B(CallRuntime), U16(Runtime::k_CreateIterResultObject), R(5), U8(2),
-                B(Star), R(7),
-                B(LdrContextSlot), R(context), U8(5), U8(0), R(5),
+                B(Star), R(5),
+                B(LdrContextSlot), R(context), U8(5), U8(0), R(6),
                 B(LdaSmi), U8(1),
-                B(SuspendGenerator), R(5),
-                B(Ldar), R(7),
+                B(SuspendGenerator), R(6),
+                B(Ldar), R(5),
   /*   25 S> */ B(Return),
                 B(LdaSmi), U8(-2),
                 B(Star), R(1),
-                B(CallRuntime), U16(Runtime::k_GeneratorGetInputOrDebugPos), R(5), U8(1),
-                B(Star), R(6),
-                B(CallRuntime), U16(Runtime::k_GeneratorGetResumeMode), R(5), U8(1),
+                B(CallRuntime), U16(Runtime::k_GeneratorGetInputOrDebugPos), 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), U8(0),
                 B(JumpIfTrue), U8(33),
                 B(LdaSmi), U8(2),
                 B(TestEqualStrict), R(8), U8(0),
                 B(JumpIfTrue), U8(23),
                 B(Jump), U8(2),
                 B(LdaTrue),
                 B(Star), R(10),
-                B(Mov), R(6), R(9),
+                B(Mov), R(7), 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(Ldar), R(7),
   /*   16 E> */ B(Throw),
                 B(LdrUndefined), R(5),
                 B(LdaTrue),
                 B(Star), R(6),
                 B(CallRuntime), U16(Runtime::k_CreateIterResultObject), R(5), U8(2),
                 B(Star), R(3),
                 B(LdaSmi), U8(2),
                 B(Star), R(2),
                 B(Jump), U8(14),
                 B(LdaSmi), U8(-1),
@@ skipping 38 matching lines @@
   [48, 233, 239],
 ]
 
 ---
 snippet: "
   function* f() { for (let x of [42]) yield x }
   f();
 "
 frame size: 18
 parameter count: 1
-bytecode array length: 807
+bytecode array length: 805
 bytecodes: [
                 B(Ldar), R(new_target),
                 B(JumpIfUndefined), U8(28),
                 B(ResumeGenerator), R(new_target),
                 B(Star), R(4),
                 B(LdaZero),
                 B(TestEqualStrict), R(4), U8(0),
                 B(JumpIfTrue), U8(68),
                 B(LdaSmi), U8(1),
                 B(TestEqualStrict), R(4), U8(0),
@@ skipping 91 matching lines @@
                 B(Ldar), R(closure),
                 B(CreateBlockContext), U8(7),
                 B(PushContext), R(2),
                 B(LdaTheHole),
                 B(StaContextSlot), R(context), U8(4), U8(0),
                 B(LdaContextSlot), R(1), U8(6), U8(0),
                 B(StaContextSlot), R(context), U8(4), U8(0),
   /*   36 S> */ B(LdaContextSlot), R(context), U8(4), U8(0),
                 B(JumpIfNotHole), U8(11),
                 B(LdaConstant), U8(8),
-                B(Star), R(13),
-                B(CallRuntime), U16(Runtime::kThrowReferenceError), R(13), U8(1),
+                B(Star), R(14),
+                B(CallRuntime), U16(Runtime::kThrowReferenceError), R(14), U8(1),
                 B(Star), R(12),
                 B(LdaFalse),
                 B(Star), R(13),
                 B(CallRuntime), U16(Runtime::k_CreateIterResultObject), R(12), U8(2),
-                B(Star), R(14),
-                B(LdrContextSlot), R(1), U8(5), U8(0), R(12),
+                B(Star), R(12),
+                B(LdrContextSlot), R(1), U8(5), U8(0), R(13),
                 B(LdaSmi), U8(1),
-                B(SuspendGenerator), R(12),
-                B(Ldar), R(14),
+                B(SuspendGenerator), R(13),
+                B(Ldar), R(12),
   /*   44 S> */ B(Return),
                 B(LdaSmi), U8(-2),
                 B(Star), R(4),
-                B(CallRuntime), U16(Runtime::k_GeneratorGetInputOrDebugPos), R(12), U8(1),
-                B(Star), R(13),
-                B(CallRuntime), U16(Runtime::k_GeneratorGetResumeMode), R(12), U8(1),
+                B(CallRuntime), U16(Runtime::k_GeneratorGetInputOrDebugPos), R(13), U8(1),
+                B(Star), R(14),
+                B(CallRuntime), U16(Runtime::k_GeneratorGetResumeMode), R(13), U8(1),
                 B(Star), R(15),
                 B(LdaZero),
                 B(TestEqualStrict), R(15), U8(0),
                 B(JumpIfTrue), U8(44),
                 B(LdaSmi), U8(2),
                 B(TestEqualStrict), R(15), U8(0),
                 B(JumpIfTrue), U8(34),
                 B(Jump), U8(2),
                 B(LdaTrue),
                 B(Star), R(17),
-                B(Mov), R(13), R(16),
+                B(Mov), R(14), R(16),
                 B(CallRuntime), U16(Runtime::k_CreateIterResultObject), R(16), 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(Star), R(9),
                 B(LdaZero),
                 B(Star), R(8),
-                B(Jump), U8(76),
-                B(Ldar), R(13),
+                B(Jump), U8(74),
+                B(Ldar), R(14),
   /*   36 E> */ B(Throw),
-                B(Ldar), R(13),
                 B(PopContext), R(2),
                 B(LdaZero),
                 B(StaContextSlot), R(1), U8(9), U8(0),
-                B(Wide), B(JumpLoop), U16(-234), U16(0),
+                B(Wide), B(JumpLoop), U16(-232), U16(0),
                 B(Jump), U8(44),
                 B(Star), R(12),
                 B(Ldar), R(closure),
                 B(CreateCatchContext), R(12), U8(11), U8(12),
                 B(Star), R(11),
                 B(PushContext), R(2),
                 B(LdrContextSlot), R(0), U8(9), U8(0), R(12),
                 B(LdaSmi), U8(2),
                 B(TestEqualStrict), R(12), U8(14),
                 B(JumpIfFalse), U8(8),
@@ skipping 140 matching lines @@
   FIXED_ARRAY_TYPE,
   FIXED_ARRAY_TYPE,
   SYMBOL_TYPE,
   Smi [158],
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["next"],
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["done"],
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["value"],
   FIXED_ARRAY_TYPE,
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["x"],
   Smi [146],
-  Smi [169],
+  Smi [167],
   ONE_BYTE_INTERNALIZED_STRING_TYPE [".catch"],
   FIXED_ARRAY_TYPE,
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["return"],
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["function"],
   ONE_BYTE_INTERNALIZED_STRING_TYPE [""],
   FIXED_ARRAY_TYPE,
   Smi [129],
   Smi [166],
   Smi [155],
-  Smi [603],
+  Smi [601],
 ]
 handlers: [
-  [48, 720, 726],
-  [153, 460, 466],
-  [156, 416, 418],
-  [574, 588, 590],
+  [48, 718, 724],
+  [153, 458, 464],
+  [156, 414, 416],
+  [572, 586, 588],
 ]