Move failing ASSERT on ARM to a more sane place.

Objects can actually be stored into themselves. This fails when no write
barrier is needed (eg, the object was just allocated).

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/148733005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19095 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/arm/lithium-codegen-arm.cc

@@ -4086,7 +4086,6 @@ void LCodeGen::DoStoreNamedField(LStoreNamedField* instr) {
 
   // Do the store.
   Register value = ToRegister(instr->value());
-  ASSERT(!object.is(value));
   SmiCheck check_needed =
       instr->hydrogen()->value()->IsHeapObject()
           ? OMIT_SMI_CHECK : INLINE_SMI_CHECK;

src/arm/macro-assembler-arm.cc

@@ -509,6 +509,7 @@ void MacroAssembler::RecordWrite(Register object,
                                  SaveFPRegsMode fp_mode,
                                  RememberedSetAction remembered_set_action,
                                  SmiCheck smi_check) {
+  ASSERT(!object.is(value));
   if (emit_debug_code()) {
     ldr(ip, MemOperand(address));
     cmp(ip, value);

test/mjsunit/recursive-store-opt.js

+// Copyright 2014 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
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --allow-natives-syntax
+
+function g() {
+  this.x = this;
+}
+
+function f() {
+  return new g();
+}
+
+f();
+f();
+%OptimizeFunctionOnNextCall(f);
+f();