Cleanup of some comparisons on ARM.

runtime/vm/assembler_arm.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_ARM)
 
 #include "vm/assembler.h"
 #include "vm/longjump.h"
 #include "vm/runtime_entry.h"
@@ skipping 73 matching lines @@
       }
     }
   }
   fclose(f);
 
   // Did not find string in the proc file.
   return false;
 }
 #endif
 
+
 void CPUFeatures::InitOnce() {
 #if defined(USING_SIMULATOR)
   integer_division_supported_ = true;
   neon_supported_ = true;
 #else
   ASSERT(CPUInfoContainsString("ARMv7"));  // Implements ARMv7.
   ASSERT(CPUInfoContainsString("vfp"));  // Has floating point unit.
   // Has integer division.
   integer_division_supported_ = CPUInfoContainsString("idiva");
   neon_supported_ = CPUInfoContainsString("neon");
@@ skipping 1481 matching lines @@
 
 
 void Assembler::PushObject(const Object& object) {
   LoadObject(IP, object);
   Push(IP);
 }
 
 
 void Assembler::CompareObject(Register rn, const Object& object) {
   ASSERT(rn != IP);
-  LoadObject(IP, object);
-  cmp(rn, ShifterOperand(IP));
+  if (object.IsSmi()) {
+    CompareImmediate(rn, reinterpret_cast<int32_t>(object.raw()));
+  } else {
+    LoadObject(IP, object);
+    cmp(rn, ShifterOperand(IP));
+  }
 }
 
 
 // Preserves object and value registers.
 void Assembler::StoreIntoObjectFilterNoSmi(Register object,
                                            Register value,
                                            Label* no_update) {
   COMPILE_ASSERT((kNewObjectAlignmentOffset == kWordSize) &&
                  (kOldObjectAlignmentOffset == 0), young_alignment);
 
@@ skipping 1123 matching lines @@
 
 const char* Assembler::FpuRegisterName(FpuRegister reg) {
   ASSERT((0 <= reg) && (reg < kNumberOfFpuRegisters));
   return fpu_reg_names[reg];
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM