[Interpreter] Refactor bytecode generator test suite.

test/cctest/interpreter/CallRuntime.golden

+#
+# Autogenerated by generate-bytecode-expectations
+#
+
+---
+pool type: mixed
+execute: yes
+wrap: no
+test function name: f
+
+---
+snippet: "
+  function f() { %TheHole() }
+  f()
+"
+frame size: 0
+parameter count: 1
+bytecodes: [
+  B(StackCheck),
+  B(CallRuntime), U16(72), R(0), U8(0),

[oth, 2016/02/22 15:54:31]

It will generate less churn if runtime function id constants are identified by
their symbolic name rather than the raw ordinal. Runtime::FunctionForId will
yield this information. One option to help with this would be have a RuntimeId
operand type rather using kIdx16

[rmcilroy, 2016/02/22 21:49:49]

+1!

[Stefano Sanfilippo, 2016/02/23 15:57:18]

Definitely. As agreed, I will prepare a follow-up CL for this.

+  B(LdaUndefined),
+  B(Return),
+]
+constant pool: [
+]
+handlers: [
+]
+
+---
+snippet: "
+  function f(a) { return %IsArray(a) }
+  f(undefined)
+"
+frame size: 1  # in multiples of sizeof(void*)
+parameter count: 2
+bytecodes: [
+  B(StackCheck),
+  B(Ldar), R(arg0),
+  B(Star), R(0),
+  B(CallRuntime), U16(39), R(0), U8(1),
+  B(Return),
+]
+constant pool: [
+]
+handlers: [
+]
+
+---
+snippet: "
+  function f() { return %Add(1, 2) }
+  f()
+"
+frame size: 2  # in multiples of sizeof(void*)
+parameter count: 1
+bytecodes: [
+  B(StackCheck),
+  B(LdaSmi8), U8(1),
+  B(Star), R(0),
+  B(LdaSmi8), U8(2),
+  B(Star), R(1),
+  B(CallRuntime), U16(424), R(0), U8(2),
+  B(Return),
+]
+constant pool: [
+]
+handlers: [
+]
+
+---
+snippet: "
+  function f() { return %spread_iterable([1]) }
+  f()
+"
+frame size: 2  # in multiples of sizeof(void*)
+parameter count: 1
+bytecodes: [
+  B(StackCheck),
+  B(LdaUndefined),
+  B(Star), R(0),
+  B(CreateArrayLiteral), U8(0), U8(0), U8(3),
+  B(Star), R(1),
+  B(CallJSRuntime), U16(127), R(0), U8(2),
+  B(Return),
+]
+constant pool: [
+  InstanceType::FIXED_ARRAY_TYPE,
+]
+handlers: [
+]
+