[turbofan] Initial version of number type feedback.

src/compiler/typer.cc

Index: src/compiler/typer.cc
diff --git a/src/compiler/typer.cc b/src/compiler/typer.cc
index d2efb97a094c45b500888b5ae6fea5405dd0a775..396175cdaa6bec8ff2c340e48653ce6f8f0949c4 100644
--- a/src/compiler/typer.cc
+++ b/src/compiler/typer.cc
@@ -1701,7 +1701,6 @@ Type* Typer::Visitor::TypeJSGeneratorRestoreRegister(Node* node) {
 
 Type* Typer::Visitor::TypeJSStackCheck(Node* node) { return Type::Any(); }
 
-
 // Simplified operators.
 
 Type* Typer::Visitor::TypeBooleanNot(Node* node) { return Type::Boolean(); }
@@ -1722,6 +1721,14 @@ Type* Typer::Visitor::TypeNumberAdd(Node* node) { return Type::Number(); }
 
 Type* Typer::Visitor::TypeNumberSubtract(Node* node) { return Type::Number(); }
 
+Type* Typer::Visitor::TypeSpeculativeNumberAdd(Node* node) {
+  return Type::Number();
+}
+
+Type* Typer::Visitor::TypeSpeculativeNumberSubtract(Node* node) {
+  return Type::Number();
+}
+
 Type* Typer::Visitor::TypeNumberMultiply(Node* node) { return Type::Number(); }
 
 Type* Typer::Visitor::TypeNumberDivide(Node* node) { return Type::Number(); }
@@ -1895,6 +1902,22 @@ Type* Typer::Visitor::TypeChangeBitToTagged(Node* node) {
   return ChangeRepresentation(arg, Type::TaggedPointer(), zone());
 }
 
+Type* Typer::Visitor::TypeCheckedUint32ToInt32(Node* node) {
+  return Type::Signed32();
+}
+
+Type* Typer::Visitor::TypeCheckedFloat64ToInt32(Node* node) {
+  return Type::Signed32();
+}
+
+Type* Typer::Visitor::TypeCheckedTaggedToInt32(Node* node) {
+  return Type::Signed32();
+}
+
+Type* Typer::Visitor::TypeCheckedTaggedToFloat64(Node* node) {
+  return Type::Number();
+}
+
 Type* Typer::Visitor::TypeTruncateTaggedToWord32(Node* node) {
   Type* arg = Operand(node, 0);
   // TODO(neis): DCHECK(arg->Is(Type::Number()));