ARM64: fix DoDeferredTaggedToI

src/arm64/lithium-codegen-arm64.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 5499 matching lines @@
   Register scratch1 = ToRegister(temp1);
   DoubleRegister dbl_scratch1 = double_scratch();
 
   Label done;
 
   // Load heap object map.
   __ Ldr(scratch1, FieldMemOperand(input, HeapObject::kMapOffset));
 
   if (instr->truncating()) {
     Register output = ToRegister(instr->result());
-    Register scratch2 = ToRegister(temp2);
     Label check_bools;
 
     // If it's not a heap number, jump to undefined check.
     __ JumpIfNotRoot(scratch1, Heap::kHeapNumberMapRootIndex, &check_bools);
 
     // A heap number: load value and convert to int32 using truncating function.
     __ TruncateHeapNumberToI(output, input);
     __ B(&done);
 
     __ Bind(&check_bools);
 
     Register true_root = output;
-    Register false_root = scratch2;
+    Register false_root = scratch1;
     __ LoadTrueFalseRoots(true_root, false_root);
-    __ Cmp(scratch1, true_root);
+    __ Cmp(input, true_root);
     __ Cset(output, eq);
-    __ Ccmp(scratch1, false_root, ZFlag, ne);
+    __ Ccmp(input, false_root, ZFlag, ne);
     __ B(eq, &done);
 
     // Output contains zero, undefined is converted to zero for truncating
     // conversions.
     DeoptimizeIfNotRoot(input, Heap::kUndefinedValueRootIndex,
                         instr->environment());
   } else {
     Register output = ToRegister32(instr->result());
 
     DoubleRegister dbl_scratch2 = ToDoubleRegister(temp2);
@@ skipping 340 matching lines @@
   __ Bind(&out_of_object);
   __ Ldr(result, FieldMemOperand(object, JSObject::kPropertiesOffset));
   // Index is equal to negated out of object property index plus 1.
   __ Sub(result, result, Operand::UntagSmiAndScale(index, kPointerSizeLog2));
   __ Ldr(result, FieldMemOperand(result,
                                  FixedArray::kHeaderSize - kPointerSize));
   __ Bind(&done);
 }
 
 } }  // namespace v8::internal