[Interpreter] Replace BytecodeRegisterAllocator with a simple bump pointer.

test/cctest/interpreter/bytecode_expectations/AssignmentsInBinaryExpression.golden

Index: test/cctest/interpreter/bytecode_expectations/AssignmentsInBinaryExpression.golden
diff --git a/test/cctest/interpreter/bytecode_expectations/AssignmentsInBinaryExpression.golden b/test/cctest/interpreter/bytecode_expectations/AssignmentsInBinaryExpression.golden
index d13b5ddbad97daaaf57140e03d1721200a07aaad..f9a3196cdaf8594760dcc252386939ddcb78173c 100644
--- a/test/cctest/interpreter/bytecode_expectations/AssignmentsInBinaryExpression.golden
+++ b/test/cctest/interpreter/bytecode_expectations/AssignmentsInBinaryExpression.golden
@@ -65,7 +65,7 @@ snippet: "
   x = x + (x = 100) + (x = 101);
   return x;
 "
-frame size: 3
+frame size: 2
 parameter count: 1
 bytecode array length: 28
 bytecodes: [
@@ -76,10 +76,10 @@ bytecodes: [
                 B(Mov), R(0), R(1),
                 B(Star), R(0),
   /*   57 E> */ B(Add), R(1), U8(2),
-                B(Star), R(2),
+                B(Star), R(1),
                 B(LdaSmi), U8(101),
                 B(Star), R(0),
-  /*   69 E> */ B(Add), R(2), U8(3),
+  /*   69 E> */ B(Add), R(1), U8(3),
                 B(Star), R(0),
   /*   77 S> */ B(Nop),
   /*   87 S> */ B(Return),
@@ -96,7 +96,7 @@ snippet: "
   x++;
   return x;
 "
-frame size: 3
+frame size: 2
 parameter count: 1
 bytecode array length: 29
 bytecodes: [
@@ -106,10 +106,10 @@ bytecodes: [
   /*   46 S> */ B(LdaSmi), U8(56),
                 B(Star), R(0),
   /*   61 E> */ B(Sub), R(0), U8(2),
-                B(Star), R(2),
+                B(Star), R(1),
                 B(LdaSmi), U8(57),
                 B(Star), R(0),
-  /*   68 E> */ B(Add), R(2), U8(3),
+  /*   68 E> */ B(Add), R(1), U8(3),
                 B(Star), R(0),
   /*   75 S> */ B(Inc), U8(4),
                 B(Star), R(0),
@@ -127,7 +127,7 @@ snippet: "
   var y = x + (x = 1) + (x = 2) + (x = 3);
   return y;
 "
-frame size: 4
+frame size: 3
 parameter count: 1
 bytecode array length: 37
 bytecodes: [
@@ -138,10 +138,10 @@ bytecodes: [
                 B(Mov), R(0), R(2),
                 B(Star), R(0),
   /*   61 E> */ B(Add), R(2), U8(2),
-                B(Star), R(3),
+                B(Star), R(2),
                 B(LdaSmi), U8(2),
                 B(Star), R(0),
-  /*   71 E> */ B(Add), R(3), U8(3),
+  /*   71 E> */ B(Add), R(2), U8(3),
                 B(Star), R(2),
                 B(LdaSmi), U8(3),
                 B(Star), R(0),
@@ -161,7 +161,7 @@ snippet: "
   var x = x + (x = 1) + (x = 2) + (x = 3);
   return x;
 "
-frame size: 3
+frame size: 2
 parameter count: 1
 bytecode array length: 37
 bytecodes: [
@@ -172,10 +172,10 @@ bytecodes: [
                 B(Mov), R(0), R(1),
                 B(Star), R(0),
   /*   61 E> */ B(Add), R(1), U8(2),
-                B(Star), R(2),
+                B(Star), R(1),
                 B(LdaSmi), U8(2),
                 B(Star), R(0),
-  /*   71 E> */ B(Add), R(2), U8(3),
+  /*   71 E> */ B(Add), R(1), U8(3),
                 B(Star), R(1),
                 B(LdaSmi), U8(3),
                 B(Star), R(0),
@@ -194,7 +194,7 @@ snippet: "
   var x = 10, y = 20;
   return x + (x = 1) + (x + 1) * (y = 2) + (y = 3) + (x = 4) + (y = 5) + y;
 "
-frame size: 5
+frame size: 4
 parameter count: 1
 bytecode array length: 72
 bytecodes: [
@@ -207,28 +207,28 @@ bytecodes: [
                 B(Mov), R(0), R(2),
                 B(Star), R(0),
   /*   68 E> */ B(Add), R(2), U8(2),
-                B(Star), R(3),
+                B(Star), R(2),
   /*   76 E> */ B(AddSmi), U8(1), R(0), U8(3),
-                B(Star), R(4),
+                B(Star), R(3),
                 B(LdaSmi), U8(2),
                 B(Star), R(1),
-  /*   88 E> */ B(Mul), R(4), U8(4),
-                B(Add), R(3), U8(5),
+  /*   88 E> */ B(Mul), R(3), U8(4),
+                B(Add), R(2), U8(5),
                 B(Star), R(2),
                 B(LdaSmi), U8(3),
                 B(Star), R(1),
   /*   98 E> */ B(Add), R(2), U8(6),
-                B(Star), R(3),
+                B(Star), R(2),
                 B(LdaSmi), U8(4),
                 B(Star), R(0),
-  /*  108 E> */ B(Add), R(3), U8(7),
+  /*  108 E> */ B(Add), R(2), U8(7),
                 B(Star), R(2),
                 B(LdaSmi), U8(5),
                 B(Star), R(1),
   /*  118 E> */ B(Add), R(2), U8(8),
-                B(Star), R(3),
+                B(Star), R(2),
                 B(Ldar), R(1),
-  /*  125 E> */ B(Add), R(3), U8(9),
+  /*  125 E> */ B(Add), R(2), U8(9),
   /*  128 S> */ B(Return),
 ]
 constant pool: [
@@ -241,7 +241,7 @@ snippet: "
   var x = 17;
   return 1 + x + (x++) + (++x);
 "
-frame size: 4
+frame size: 3
 parameter count: 1
 bytecode array length: 41
 bytecodes: [
@@ -252,18 +252,18 @@ bytecodes: [
                 B(Star), R(1),
                 B(Ldar), R(0),
   /*   57 E> */ B(Add), R(1), U8(2),
-                B(Star), R(2),
+                B(Star), R(1),
                 B(Ldar), R(0),
-                B(ToNumber), R(1),
+                B(ToNumber), R(2),
                 B(Inc), U8(3),
                 B(Star), R(0),
-                B(Ldar), R(1),
-  /*   63 E> */ B(Add), R(2), U8(4),
-                B(Star), R(3),
+                B(Ldar), R(2),
+  /*   63 E> */ B(Add), R(1), U8(4),
+                B(Star), R(1),
                 B(Ldar), R(0),
                 B(Inc), U8(5),
                 B(Star), R(0),
-  /*   72 E> */ B(Add), R(3), U8(6),
+  /*   72 E> */ B(Add), R(1), U8(6),
   /*   76 S> */ B(Return),
 ]
 constant pool: [