Merged: [turbofan] Remove representation axis for float64 fields.

src/compiler/js-native-context-specialization.cc

Index: src/compiler/js-native-context-specialization.cc
diff --git a/src/compiler/js-native-context-specialization.cc b/src/compiler/js-native-context-specialization.cc
index 46529074e2ab5ad3a44d0a9ffadc3435829d7384..81d4cd04ca6935635c12e1af14dacab2d67371ad 100644
--- a/src/compiler/js-native-context-specialization.cc
+++ b/src/compiler/js-native-context-specialization.cc
@@ -260,6 +260,11 @@ Reduction JSNativeContextSpecialization::ReduceNamedAccess(
           field_type,  MachineType::AnyTagged(), kFullWriteBarrier};
       if (access_mode == AccessMode::kLoad) {
         if (field_type->Is(Type::UntaggedFloat64())) {
+          // TODO(turbofan): We remove the representation axis from the type to
+          // avoid uninhabited representation types. This is a workaround until
+          // the {PropertyAccessInfo} is using {MachineRepresentation} instead.
+          field_access.type = Type::Union(
+              field_type, Type::Representation(Type::Number(), zone()), zone());
           if (!field_index.is_inobject() || field_index.is_hidden_field() ||
               !FLAG_unbox_double_fields) {
             this_storage = this_effect =
@@ -276,6 +281,11 @@ Reduction JSNativeContextSpecialization::ReduceNamedAccess(
       } else {
         DCHECK_EQ(AccessMode::kStore, access_mode);
         if (field_type->Is(Type::UntaggedFloat64())) {
+          // TODO(turbofan): We remove the representation axis from the type to
+          // avoid uninhabited representation types. This is a workaround until
+          // the {PropertyAccessInfo} is using {MachineRepresentation} instead.
+          field_access.type = Type::Union(
+              field_type, Type::Representation(Type::Number(), zone()), zone());
           Node* check =
               graph()->NewNode(simplified()->ObjectIsNumber(), this_value);
           this_control = this_effect =