MIPS: Adding assertions to fast elements conversion.

src/mips/codegen-mips.cc

 // Copyright 2011 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 168 matching lines @@
                                             t7,
                                             f0);
     __ sw(a0, MemOperand(t3));  // mantissa
     __ sw(a1, MemOperand(t3, kIntSize));  // exponent
     __ Addu(t3, t3, kDoubleSize);
   }
   __ Branch(&entry);
 
   // Hole found, store the-hole NaN.
   __ bind(&convert_hole);
+  if (FLAG_debug_code) {
+    __ LoadRoot(at, Heap::kTheHoleValueRootIndex);
+    __ Assert(eq, "object found in smi-only array", at, Operand(t5));
+  }
   __ sw(t0, MemOperand(t3));  // mantissa
   __ sw(t1, MemOperand(t3, kIntSize));  // exponent
   __ Addu(t3, t3, kDoubleSize);
 
   __ bind(&entry);
   __ Branch(&loop, lt, t3, Operand(t2));
 
   if (!fpu_supported) __ Pop(a1, a0);
   __ pop(ra);
 }
@@ skipping 105 matching lines @@
                       EMIT_REMEMBERED_SET,
                       OMIT_SMI_CHECK);
   __ pop(ra);
 }
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS