MIPS: Cleanup: use JumpIf[Not]Smi() whenever we can

src/mips/full-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 3367 matching lines @@
   Register tmp2 = a3;
 
   VisitForStackValue(args->at(0));
   VisitForAccumulatorValue(args->at(1));  // Result (right) in v0.
   __ pop(left);
 
   Label done, fail, ok;
   __ Branch(&ok, eq, left, Operand(right));
   // Fail if either is a non-HeapObject.
   __ And(tmp, left, Operand(right));
-  __ And(at, tmp, Operand(kSmiTagMask));
-  __ Branch(&fail, eq, at, Operand(zero_reg));
+  __ JumpIfSmi(tmp, &fail);
   __ lw(tmp, FieldMemOperand(left, HeapObject::kMapOffset));
   __ lbu(tmp2, FieldMemOperand(tmp, Map::kInstanceTypeOffset));
   __ Branch(&fail, ne, tmp2, Operand(JS_REGEXP_TYPE));
   __ lw(tmp2, FieldMemOperand(right, HeapObject::kMapOffset));
   __ Branch(&fail, ne, tmp, Operand(tmp2));
   __ lw(tmp, FieldMemOperand(left, JSRegExp::kDataOffset));
   __ lw(tmp2, FieldMemOperand(right, JSRegExp::kDataOffset));
   __ Branch(&ok, eq, tmp, Operand(tmp2));
   __ bind(&fail);
   __ LoadRoot(v0, Heap::kFalseValueRootIndex);
@@ skipping 864 matching lines @@
   __ LoadRoot(a1, nil_value);
   if (expr->op() == Token::EQ_STRICT) {
     Split(eq, a0, Operand(a1), if_true, if_false, fall_through);
   } else {
     Heap::RootListIndex other_nil_value = nil == kNullValue ?
         Heap::kUndefinedValueRootIndex :
         Heap::kNullValueRootIndex;
     __ Branch(if_true, eq, a0, Operand(a1));
     __ LoadRoot(a1, other_nil_value);
     __ Branch(if_true, eq, a0, Operand(a1));
-    __ And(at, a0, Operand(kSmiTagMask));
-    __ Branch(if_false, eq, at, Operand(zero_reg));
+    __ JumpIfSmi(a0, if_false);
     // It can be an undetectable object.
     __ lw(a1, FieldMemOperand(a0, HeapObject::kMapOffset));
     __ lbu(a1, FieldMemOperand(a1, Map::kBitFieldOffset));
     __ And(a1, a1, Operand(1 << Map::kIsUndetectable));
     Split(ne, a1, Operand(zero_reg), if_true, if_false, fall_through);
   }
   context()->Plug(if_true, if_false);
 }
 
 
@@ skipping 100 matching lines @@
   *context_length = 0;
   return previous_;
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS