[wasm] Master CL for Binary 0xC changes.

src/asmjs/asm-typer.h

Index: src/asmjs/asm-typer.h
diff --git a/src/asmjs/asm-typer.h b/src/asmjs/asm-typer.h
index 0d7aa2542076dade88371f9761c913aca1f06a12..4fb402949d8aaa81605b43c34a6806c8bad42062 100644
--- a/src/asmjs/asm-typer.h
+++ b/src/asmjs/asm-typer.h
@@ -73,12 +73,26 @@ class AsmTyper final {
   const char* error_message() const { return error_message_; }
 
   AsmType* TypeOf(AstNode* node) const;
+  AsmType* TypeOf(Variable* v) const;
   StandardMember VariableAsStandardMember(Variable* var);
 
   typedef std::unordered_set<StandardMember, std::hash<int> > StdlibSet;
 
   StdlibSet StdlibUses() const { return stdlib_uses_; }
 
+  // Each FFI import has a usage-site signature associated with it.
+  struct FFIUseSignature {
+    Variable* var;
+    ZoneVector<AsmType*> arg_types_;
+    AsmType* return_type_;
+    FFIUseSignature(Variable* v, Zone* zone)
+        : var(v), arg_types_(zone), return_type_(nullptr) {}
+  };
+
+  const ZoneVector<FFIUseSignature>& FFIUseSignatures() {
+    return ffi_use_signatures_;
+  }
+
  private:
   friend class v8::internal::wasm::AsmTyperHarnessBuilder;
 
@@ -192,7 +206,7 @@ class AsmTyper final {
   //   Lookup(Delta, Gamma, x)
   //
   // Delta is the global_scope_ member, and Gamma, local_scope_.
-  VariableInfo* Lookup(Variable* variable);
+  VariableInfo* Lookup(Variable* variable) const;
 
   // All of the ValidateXXX methods below return AsmType::None() in case of
   // validation failure.
@@ -306,6 +320,7 @@ class AsmTyper final {
   AsmType* return_type_ = nullptr;
 
   ZoneVector<VariableInfo*> forward_definitions_;
+  ZoneVector<FFIUseSignature> ffi_use_signatures_;
   ObjectTypeMap stdlib_types_;
   ObjectTypeMap stdlib_math_types_;