[wasm] asm.js - Check stdlib.NaN is valid, prepare for the rest.

src/asmjs/asm-typer.cc

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/asmjs/asm-typer.h"
 
 #include <algorithm>
 #include <limits>
 #include <memory>
 #include <string>
@@ skipping 410 matching lines @@
   }
 
   return AsmType::None();
 }
 
 AsmTyper::StandardMember AsmTyper::VariableAsStandardMember(Variable* var) {
   auto* var_info = Lookup(var);
   if (var_info == nullptr) {
     return kNone;
   }
-  return var_info->standard_member();
+  StandardMember member = var_info->standard_member();
+  stdlib_uses_.insert(member);
+  return member;
 }
 
 bool AsmTyper::Validate() {
   if (!AsmType::None()->IsExactly(ValidateModule(root_))) {
     return true;
   }
   return false;
 }
 
 namespace {
@@ skipping 2302 matching lines @@
     return true;
   }
 
   *error_message = typer.error_message();
   return false;
 }
 
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8