A64: Pregenerate the CEntryStub when saving FP registers.

src/a64/code-stubs-a64.cc

 // Copyright 2013 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
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 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
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@@ skipping 2148 matching lines @@
   // in AAPCS64. If the stub is moved (perhaps during a GC), we could end up
   // returning to dead code.
   // TODO(jbramley): Whilst this is the only analysis that makes sense, I can't
   // find any comment to confirm this, and I don't hit any crashes whatever
   // this function returns. The anaylsis should be properly confirmed.
   return true;
 }
 
 
 bool CEntryStub::IsPregenerated() {
-  // TODO(jbramley): We should pregenerate kSaveFPRegs too, once we support it.
-  return (save_doubles_ == kDontSaveFPRegs) && (result_size_ == 1);
+  return result_size_ == 1;
 }
 
 
 void CEntryStub::GenerateAheadOfTime(Isolate* isolate) {
   CEntryStub stub(1, kDontSaveFPRegs);
   stub.GetCode(isolate)->set_is_pregenerated(true);
-  // TODO(jbramley): We should generate kSaveFPRegs here too, but it is not yet
-  // implemented by CEntryStub because it is only used by Lithium.
+  CEntryStub stub_fp(1, kSaveFPRegs);
+  stub_fp.GetCode(isolate)->set_is_pregenerated(true);
 }
 
 
 void CEntryStub::GenerateCore(MacroAssembler* masm,
                               Label* throw_normal,
                               Label* throw_termination,
                               Label* throw_out_of_memory,
                               bool do_gc,
                               bool always_allocate) {
   // x0  : Result parameter for PerformGC, if do_gc is true.
@@ skipping 4716 matching lines @@
   __ Bind(&fast_elements_case);
   GenerateCase(masm, FAST_ELEMENTS);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_A64