[Interpreter] Introduce IncStub and DecStub.

test/cctest/interpreter/bytecode_expectations/BasicLoops.golden

 #
 # Autogenerated by generate-bytecode-expectations.
 #
 
 ---
 pool type: mixed
 execute: yes
 wrap: yes
 
 ---
@@ skipping 666 matching lines @@
 ---
 snippet: "
   var y = 1;
   for (var x = 10; x; --x) {
     y = y * 12;
   }
   return y;
 "
 frame size: 3
 parameter count: 1
-bytecode array length: 35
+bytecode array length: 34
 bytecodes: [
   B(StackCheck),
   B(LdaSmi), U8(1),
   B(Star), R(0),
   B(LdaSmi), U8(10),
   B(Star), R(1),
   B(Ldar), R(1),
-  B(JumpIfToBooleanFalse), U8(21),
+  B(JumpIfToBooleanFalse), U8(20),
   B(StackCheck),
   B(Ldar), R(0),
   B(Star), R(2),
   B(LdaSmi), U8(12),
   B(Mul), R(2),
   B(Star), R(0),
   B(Ldar), R(1),
-  B(ToNumber),
   B(Dec),
   B(Star), R(1),
-  B(Jump), U8(-21),
+  B(Jump), U8(-20),
   B(Ldar), R(0),
   B(Return),
 ]
 constant pool: [
 ]
 handlers: [
 ]
 
 ---
 snippet: "
@@ skipping 24 matching lines @@
 snippet: "
   var x = 0;
   for (var i = 0; true; ++i) {
     x = x + 1;
     if (x == 20) break;
   };
   return x;
 "
 frame size: 3
 parameter count: 1
-bytecode array length: 39
+bytecode array length: 38
 bytecodes: [
   B(StackCheck),
   B(LdaZero),
   B(Star), R(0),
   B(LdaZero),
   B(Star), R(1),
   B(StackCheck),
   B(Ldar), R(0),
   B(Star), R(2),
   B(LdaSmi), U8(1),
   B(Add), R(2),
   B(Star), R(0),
   B(Star), R(2),
   B(LdaSmi), U8(20),
   B(TestEqual), R(2),
   B(JumpIfFalse), U8(4),
-  B(Jump), U8(10),
+  B(Jump), U8(9),
   B(Ldar), R(1),
-  B(ToNumber),
   B(Inc),
   B(Star), R(1),
-  B(Jump), U8(-27),
+  B(Jump), U8(-26),
   B(Ldar), R(0),
   B(Return),
 ]
 constant pool: [
 ]
 handlers: [
 ]
 
 ---
 snippet: "
@@ skipping 67 matching lines @@
 ]
 constant pool: [
   InstanceType::FIXED_ARRAY_TYPE,
   InstanceType::SHARED_FUNCTION_INFO_TYPE,
   InstanceType::ONE_BYTE_INTERNALIZED_STRING_TYPE,
   InstanceType::ONE_BYTE_INTERNALIZED_STRING_TYPE,
 ]
 handlers: [
 ]