[arm] Don't call branch_offset within CheckConstPool.

test/cctest/test-assembler-arm.cc

 // Copyright 2012 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 2009 matching lines @@
 
   Assembler assm(isolate, NULL, 0);
   Label end;
   __ mov(r0, Operand(isolate->factory()->infinity_value()));
   for (int i = 0; i < 1020; ++i) {
     __ blx(&end);
   }
   __ bind(&end);
 }
 
+
+TEST(regress4292_CheckConstPool) {
+  CcTest::InitializeVM();
+  Isolate* isolate = CcTest::i_isolate();
+  HandleScope scope(isolate);
+
+  Assembler assm(isolate, NULL, 0);
+  __ mov(r0, Operand(isolate->factory()->infinity_value()));
+  __ BlockConstPoolFor(1019);
+  for (int i = 0; i < 1019; ++i) __ nop();
+  __ vldr(d0, MemOperand(r0, 0));
+}
+
 #undef __