[turbofan] Add operators for float32 support.

src/compiler/typer.cc

Index: src/compiler/typer.cc
diff --git a/src/compiler/typer.cc b/src/compiler/typer.cc
index c4af35e16dd1b04db09fcf76e59199266dd8eb2e..bfecdef61e9b5f80413d3a0c653cd0d9e5c9ba81 100644
--- a/src/compiler/typer.cc
+++ b/src/compiler/typer.cc
@@ -255,6 +255,12 @@ Bounds Typer::Visitor::TypeInt64Constant(Node* node) {
 }
 
 
+Bounds Typer::Visitor::TypeFloat32Constant(Node* node) {
+  // TODO(titzer): only call Type::Of() if the type is not already known.
+  return Bounds(Type::Of(OpParameter<float>(node), zone()));
+}
+
+
 Bounds Typer::Visitor::TypeFloat64Constant(Node* node) {
   // TODO(titzer): only call Type::Of() if the type is not already known.
   return Bounds(Type::Of(OpParameter<double>(node), zone()));