[turbofan] Add CalleeSavedFPRegisters to CallDescriptor.

src/compiler/arm64/linkage-arm64.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/assembler.h"
 #include "src/code-stubs.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/linkage-impl.h"
 #include "src/zone.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 struct Arm64LinkageHelperTraits {
   static Register ReturnValueReg() { return x0; }
   static Register ReturnValue2Reg() { return x1; }
   static Register JSCallFunctionReg() { return x1; }
   static Register ContextReg() { return cp; }
   static Register RuntimeCallFunctionReg() { return x1; }
   static Register RuntimeCallArgCountReg() { return x0; }
   static RegList CCalleeSaveRegisters() {
-    // TODO(dcarney): correct callee saved registers.
-    return 0;
+    return (1 << x19.code()) | (1 << x20.code()) | (1 << x21.code()) |
+           (1 << x22.code()) | (1 << x23.code()) | (1 << x24.code()) |
+           (1 << x25.code()) | (1 << x26.code()) | (1 << x27.code()) |
+           (1 << x28.code()) | (1 << x29.code()) | (1 << x30.code());
+  }
+  static RegList CCalleeSaveFPRegisters() {
+    return (1 << d8.code()) | (1 << d9.code()) | (1 << d10.code()) |
+           (1 << d11.code()) | (1 << d12.code()) | (1 << d13.code()) |
+           (1 << d14.code()) | (1 << d15.code());
   }
   static Register CRegisterParameter(int i) {
     static Register register_parameters[] = {x0, x1, x2, x3, x4, x5, x6, x7};
     return register_parameters[i];
   }
   static int CRegisterParametersLength() { return 8; }
   static int CStackBackingStoreLength() { return 0; }
 };
 
 
@@ skipping 25 matching lines @@
 
 
 CallDescriptor* Linkage::GetSimplifiedCDescriptor(Zone* zone,
                                                   const MachineSignature* sig) {
   return LH::GetSimplifiedCDescriptor(zone, sig);
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8