Add support for Float32 representation changes.

src/compiler/js-graph.h

Index: src/compiler/js-graph.h
diff --git a/src/compiler/js-graph.h b/src/compiler/js-graph.h
index 2b2dfd114d21c3c59960fc853dacc7f696ff2466..fd3de124f05cadec570cba02cda5f9433963bdd3 100644
--- a/src/compiler/js-graph.h
+++ b/src/compiler/js-graph.h
@@ -69,6 +69,9 @@ class JSGraph : public ZoneObject {
     return Int32Constant(bit_cast<int32_t>(value));
   }
 
+  // Creates a Float32Constant node, usually canonicalized.
+  Node* Float32Constant(float value);
+
   // Creates a Float64Constant node, usually canonicalized.
   Node* Float64Constant(double value);