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

src/x64/macro-assembler-x64.cc

Index: src/x64/macro-assembler-x64.cc
diff --git a/src/x64/macro-assembler-x64.cc b/src/x64/macro-assembler-x64.cc
index 96fa4fc49630424093eaa29874c118e95c34a115..99a056f4b088a28cd4b140c0260b653542d7f612 100644
--- a/src/x64/macro-assembler-x64.cc
+++ b/src/x64/macro-assembler-x64.cc
@@ -605,22 +605,9 @@ void MacroAssembler::IndexFromHash(Register hash, Register index) {
 }
 
 
-void MacroAssembler::CallRuntime(Runtime::FunctionId id, int num_arguments) {
-  CallRuntime(Runtime::FunctionForId(id), num_arguments);
-}
-
-
-void MacroAssembler::CallRuntimeSaveDoubles(Runtime::FunctionId id) {
-  const Runtime::Function* function = Runtime::FunctionForId(id);
-  Set(rax, function->nargs);
-  LoadAddress(rbx, ExternalReference(function, isolate()));
-  CEntryStub ces(1, kSaveFPRegs);
-  CallStub(&ces);
-}
-
-
 void MacroAssembler::CallRuntime(const Runtime::Function* f,
-                                 int num_arguments) {
+                                 int num_arguments,
+                                 SaveFPRegsMode save_doubles) {
   // If the expected number of arguments of the runtime function is
   // constant, we check that the actual number of arguments match the
   // expectation.
@@ -635,7 +622,7 @@ void MacroAssembler::CallRuntime(const Runtime::Function* f,
   // smarter.
   Set(rax, num_arguments);
   LoadAddress(rbx, ExternalReference(f, isolate()));
-  CEntryStub ces(f->result_size);
+  CEntryStub ces(f->result_size, save_doubles);
   CallStub(&ces);
 }