ARM: Fix the type recording binary operation stub subtract...

src/arm/code-stubs-arm.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 2677 matching lines @@
 
   Label call_runtime;
 
   GenerateSmiCode(masm, &call_runtime, ALLOW_HEAPNUMBER_RESULTS);
 
   // If all else fails, use the runtime system to get the correct
   // result.
   __ bind(&call_runtime);
 
   // Try to add strings before calling runtime.
-  GenerateAddStrings(masm);
+  if (op_ == Token::ADD) {
+    GenerateAddStrings(masm);
+  }
 
   GenericBinaryOpStub stub(op_, mode_, r1, r0);
   __ TailCallStub(&stub);
 }
 
 
 void TypeRecordingBinaryOpStub::GenerateAddStrings(MacroAssembler* masm) {
+  ASSERT(op_ == Token::ADD);
+
   Register left = r1;
   Register right = r0;
   Label call_runtime;
 
   // Check if first argument is a string.
   __ JumpIfSmi(left, &call_runtime);
   __ CompareObjectType(left, r2, r2, FIRST_NONSTRING_TYPE);
   __ b(ge, &call_runtime);
 
   // First argument is a a string, test second.
@@ skipping 2940 matching lines @@
   __ pop(r1);
   __ Jump(r2);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM