A64: Pregenerate the CEntryStub when saving FP registers.

src/a64/code-stubs-a64.cc

Index: src/a64/code-stubs-a64.cc
diff --git a/src/a64/code-stubs-a64.cc b/src/a64/code-stubs-a64.cc
index 3d6c690713755cd511c1857169a5e8d82b5128f0..0608d3d899ec801c40a95bf861ba1cad160a2636 100644
--- a/src/a64/code-stubs-a64.cc
+++ b/src/a64/code-stubs-a64.cc
@@ -2166,16 +2166,15 @@ bool CEntryStub::NeedsImmovableCode() {
 
 
 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);
 }