[turbofan] Added the RoundInt64ToFloat64 instruction to TurboFan.

src/compiler/typer.cc

Index: src/compiler/typer.cc
diff --git a/src/compiler/typer.cc b/src/compiler/typer.cc
index 6d54d20c5fd2da74ade307366bbe52d8cbef169d..d45459c9c5843b3a58828c58d7c4757dcbb5ef09 100644
--- a/src/compiler/typer.cc
+++ b/src/compiler/typer.cc
@@ -2017,6 +2017,11 @@ Type* Typer::Visitor::TypeTruncateInt64ToInt32(Node* node) {
 }
 
 
+Type* Typer::Visitor::TypeRoundInt64ToFloat64(Node* node) {
+  return Type::PlainNumber();

[rossberg, 2015/11/03 15:13:24]

Ah, no, you should keep the Intersect as before, just replace the Internal part
in your earlier version. Sorry for not being clearer.

[ahaas, 2015/11/03 15:26:37]

Done.

+}
+
+
 Type* Typer::Visitor::TypeBitcastFloat32ToInt32(Node* node) {
   return Type::Number();
 }