[ast] Annotate CallRuntime ast node

src/ast/ast.cc

Index: src/ast/ast.cc
diff --git a/src/ast/ast.cc b/src/ast/ast.cc
index 80726ea364030aa01d6ab307136fb3e2cc75e5a0..0c0e535329b3b7d306b86e7a9e70cb63cf39b10c 100644
--- a/src/ast/ast.cc
+++ b/src/ast/ast.cc
@@ -29,6 +29,21 @@ namespace internal {
 
 #ifdef DEBUG
 
+static const char* NameForNativeContextIntrinsicIndex(uint32_t idx) {
+  switch (idx) {
+#define NATIVE_CONTEXT_FIELDS_IDX(NAME, Type, name) \
+  case Context::NAME:                               \
+    return #name;
+
+    NATIVE_CONTEXT_FIELDS(NATIVE_CONTEXT_FIELDS_IDX)
+
+    default:
+      break;
+  }
+
+  return "UnknownIntrinsicIndex";
+}
+
 void AstNode::Print() { Print(Isolate::Current()); }
 
 void AstNode::Print(Isolate* isolate) {
@@ -1064,5 +1079,13 @@ bool Literal::Match(void* literal1, void* literal2) {
          (x->IsNumber() && y->IsNumber() && x->AsNumber() == y->AsNumber());
 }
 
+const char* CallRuntime::debug_name() {
+#ifdef DEBUG
+  return NameForNativeContextIntrinsicIndex(context_index_);

[caitp, 2017/01/29 05:32:33]

Hey, sorry I didn't catch this sooner. This makes intrinsics not installed on
the native context print the useless "UnknownIntrinsicIndex".

This needs a `is_jsruntime()` predicate like in the release build case below

+#else
+  return is_jsruntime() ? "(context function)" : function_->name;
+#endif  // DEBUG
+}
+
 }  // namespace internal
 }  // namespace v8