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

src/mips/macro-assembler-mips.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 4118 matching lines @@
   } else {
     subu(dst, left, right);
     xor_(overflow_dst, dst, left);
     xor_(scratch, left, right);
     and_(overflow_dst, scratch, overflow_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
   // constant, we check that the actual number of arguments match the
   // expectation.
   if (f->nargs >= 0 && f->nargs != num_arguments) {
     IllegalOperation(num_arguments);
     return;
   }
 
   // TODO(1236192): Most runtime routines don't need the number of
   // arguments passed in because it is constant. At some point we
   // should remove this need and make the runtime routine entry code
   // smarter.
   PrepareCEntryArgs(num_arguments);
   PrepareCEntryFunction(ExternalReference(f, isolate()));
-  CEntryStub stub(1);
+  CEntryStub stub(1, save_doubles);
   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);
-  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) {
   PrepareCEntryArgs(num_arguments);
   PrepareCEntryFunction(ext);
 
   CEntryStub stub(1);
   CallStub(&stub, TypeFeedbackId::None(), al, zero_reg, Operand(zero_reg), bd);
 }
 
@@ skipping 1506 matching lines @@
        opcode == BGTZL);
   opcode = (cond == eq) ? BEQ : BNE;
   instr = (instr & ~kOpcodeMask) | opcode;
   masm_.emit(instr);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS