MIPS: Lazily save double registers for HCallRuntime instructions within Hydrogen code stubs.

src/mips/macro-assembler-mips.h

Index: src/mips/macro-assembler-mips.h
diff --git a/src/mips/macro-assembler-mips.h b/src/mips/macro-assembler-mips.h
index 9cc774873d6d98af8308c5a46eea1c2a95e4c519..2814c943b49b3b2ec54a7a77e062cc086d402cc4 100644
--- a/src/mips/macro-assembler-mips.h
+++ b/src/mips/macro-assembler-mips.h
@@ -1201,11 +1201,18 @@ class MacroAssembler: public Assembler {
   void CallJSExitStub(CodeStub* stub);
 
   // Call a runtime routine.
-  void CallRuntime(const Runtime::Function* f, int num_arguments);
-  void CallRuntimeSaveDoubles(Runtime::FunctionId id);
+  void CallRuntime(const Runtime::Function* f,
+                   int num_arguments,
+                   SaveFPRegsMode save_doubles = kDontSaveFPRegs);
+  void CallRuntimeSaveDoubles(Runtime::FunctionId id) {
+    const Runtime::Function* function = Runtime::FunctionForId(id);
+    CallRuntime(function, function->nargs, kSaveFPRegs);
+  }
 
   // Convenience function: Same as above, but takes the fid instead.
-  void CallRuntime(Runtime::FunctionId fid, int num_arguments);
+  void CallRuntime(Runtime::FunctionId id, int num_arguments) {
+    CallRuntime(Runtime::FunctionForId(id), num_arguments);
+  }
 
   // Convenience function: call an external reference.
   void CallExternalReference(const ExternalReference& ext,