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

src/mips/macro-assembler-mips.cc

Index: src/mips/macro-assembler-mips.cc
diff --git a/src/mips/macro-assembler-mips.cc b/src/mips/macro-assembler-mips.cc
index cbb538f39d34d8977c978fd08681f5dbce3b31a8..788f2aacd84ecdc9ec803d40f5d1f55bb32392fa 100644
--- a/src/mips/macro-assembler-mips.cc
+++ b/src/mips/macro-assembler-mips.cc
@@ -4136,7 +4136,8 @@ void MacroAssembler::SubuAndCheckForOverflow(Register dst,
 
 
 void MacroAssembler::CallRuntime(const Runtime::Function* f,
-                                 int num_arguments) {
+                                 int num_arguments,
+                                 SaveFPRegsMode save_doubles) {
   // All parameters are on the stack. v0 has the return value after call.
 
   // If the expected number of arguments of the runtime function is
@@ -4153,25 +4154,11 @@ void MacroAssembler::CallRuntime(const Runtime::Function* f,
   // smarter.
   PrepareCEntryArgs(num_arguments);
   PrepareCEntryFunction(ExternalReference(f, isolate()));
-  CEntryStub stub(1);
-  CallStub(&stub);
-}
-
-
-void MacroAssembler::CallRuntimeSaveDoubles(Runtime::FunctionId id) {
-  const Runtime::Function* function = Runtime::FunctionForId(id);
-  PrepareCEntryArgs(function->nargs);
-  PrepareCEntryFunction(ExternalReference(function, isolate()));
-  CEntryStub stub(1, kSaveFPRegs);
+  CEntryStub stub(1, save_doubles);
   CallStub(&stub);
 }
 
 
-void MacroAssembler::CallRuntime(Runtime::FunctionId fid, int num_arguments) {
-  CallRuntime(Runtime::FunctionForId(fid), num_arguments);
-}
-
-
 void MacroAssembler::CallExternalReference(const ExternalReference& ext,
                                            int num_arguments,
                                            BranchDelaySlot bd) {