A64: Handle Smi representation in MathAbs and fix MathPowStub

src/a64/lithium-codegen-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 3507 matching lines @@
     Label allocation;
   };
 
   // TODO(jbramley): The early-exit mechanism would skip the new frame handling
   // in GenerateDeferredCode. Tidy this up.
   ASSERT(!NeedsDeferredFrame());
 
   DeferredMathAbsTagged* deferred =
       new(zone()) DeferredMathAbsTagged(this, instr);
 
-  ASSERT(instr->hydrogen()->value()->representation().IsTagged());
+  ASSERT(instr->hydrogen()->value()->representation().IsTagged() ||
+         instr->hydrogen()->value()->representation().IsSmi());
   Register input = ToRegister(instr->value());
   Register result_bits = ToRegister(instr->temp3());
   Register result = ToRegister(instr->result());
   Label done;
 
   // Handle smis inline.
   // We can treat smis as 64-bit integers, since the (low-order) tag bits will
   // never get set by the negation. This is therefore the same as the Integer32
   // case in DoMathAbs, except that it operates on 64-bit values.
   STATIC_ASSERT((kSmiValueSize == 32) && (kSmiShift == 32) && (kSmiTag == 0));
@@ skipping 1919 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