[async-iteration] implement Async-from-Sync Iterator

src/compiler/code-assembler.cc

Index: src/compiler/code-assembler.cc
diff --git a/src/compiler/code-assembler.cc b/src/compiler/code-assembler.cc
index 6ecc45930ecdc8a9f90e0b1f3c912453d20d9a39..0aa69cdb4c7c895f4a4f604de3433e3512056e1d 100644
--- a/src/compiler/code-assembler.cc
+++ b/src/compiler/code-assembler.cc
@@ -187,6 +187,10 @@ Node* CodeAssembler::HeapConstant(Handle<HeapObject> object) {
   return raw_assembler()->HeapConstant(object);
 }
 
+Node* CodeAssembler::CStringConstant(const char* str) {

[jgruber, 2017/02/17 12:28:23]

Just an idea - maybe it'd make sense to add an option to create an internalized
string. That can be important e.g. if we use it for property loads.

[caitp, 2017/02/17 14:56:10]

I think most of the time in those situations we end up using string constants
from heap-symbols.h, but maybe it would be more readable to do it that way.

How would you imagine writing it? `CStringConstant("foo", true); to internalize
"foo"? Or maybe someting more like `InternalizedCStringConstant("foo");`

[jgruber, 2017/02/17 16:13:39]

Hmm, I guess both aren't really satisfying. This is probably a nonissue, I'm
fine with sticking to your current solution.

+  return HeapConstant(factory()->NewStringFromAsciiChecked(str, TENURED));
+}
+
 Node* CodeAssembler::BooleanConstant(bool value) {
   return raw_assembler()->BooleanConstant(value);
 }