Merged r16772, r18000, r18298, r18319 into 3.21 branch.

src/ia32/lithium-codegen-ia32.h

Index: src/ia32/lithium-codegen-ia32.h
diff --git a/src/ia32/lithium-codegen-ia32.h b/src/ia32/lithium-codegen-ia32.h
index 769917f7e2473e817f11280d279c5f800d70885c..facc1caeff5ee52745565353596ca8fce11f4020 100644
--- a/src/ia32/lithium-codegen-ia32.h
+++ b/src/ia32/lithium-codegen-ia32.h
@@ -224,6 +224,9 @@ class LCodeGen V8_FINAL BASE_EMBEDDED {
 
   void AddDeferredCode(LDeferredCode* code) { deferred_.Add(code, zone()); }
 
+  void SaveCallerDoubles();
+  void RestoreCallerDoubles();
+
   // Code generation passes.  Returns true if code generation should
   // continue.
   bool GeneratePrologue();