A64: Tidy up register use in TaggedToI

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
 //       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 547 matching lines @@
   __ Push(scratch1, scratch2);
   // Account for saved regs if input is jssp.
   if (input.is(jssp)) double_offset += 2 * kPointerSize;
 
   if (!skip_fastpath()) {
     __ Push(double_scratch);
     if (input.is(jssp)) double_offset += 1 * kDoubleSize;
     __ Ldr(double_scratch, MemOperand(input, double_offset));
     // Try to convert with a FPU convert instruction.  This handles all
     // non-saturating cases.
-    __ TryInlineTruncateDoubleToI(result, double_scratch, &done);
+    __ TryConvertDoubleToInt64(result, double_scratch, &done);
     __ Fmov(result, double_scratch);
   } else {
     __ Ldr(result, MemOperand(input, double_offset));
   }
 
   // If we reach here we need to manually convert the input to an int32.
 
   // Extract the exponent.
   Register exponent = scratch1;
   __ Ubfx(exponent, result, HeapNumber::kMantissaBits,
@@ skipping 5220 matching lines @@
                               MemOperand(fp, 6 * kPointerSize),
                               NULL);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_A64