Eliminates some branches from arm code.

runtime/vm/intrinsifier_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"  // Needed here to get TARGET_ARCH_ARM.
 #if defined(TARGET_ARCH_ARM)
 
 #include "vm/intrinsifier.h"
 
 #include "vm/assembler.h"
@@ skipping 931 matching lines @@
   __ LoadObject(R0, Bool::False());  // Smi == Mint -> false.
   __ Ret();
 
   __ Bind(&receiver_not_smi);
   // R1:: receiver.
 
   __ CompareClassId(R1, kMintCid, R2);
   __ b(&fall_through, NE);
   // Receiver is Mint, return false if right is Smi.
   __ tst(R0, Operand(kSmiTagMask));
-  __ b(&fall_through, NE);
-  __ LoadObject(R0, Bool::False());
-  __ Ret();
+  __ LoadObject(R0, Bool::False(), EQ);
+  __ bx(LR, EQ);
   // TODO(srdjan): Implement Mint == Mint comparison.
 
   __ Bind(&fall_through);
 }
 
 
 void Intrinsifier::Integer_equal(Assembler* assembler) {
   Integer_equalToInteger(assembler);
 }
 
@@ skipping 256 matching lines @@
     // convert NaN to an int.
     __ vcmpd(D0, D0);
     __ vmstat();
     __ b(&fall_through, VS);
 
     __ vcvtid(S0, D0);
     __ vmovrs(R0, S0);
     // Overflow is signaled with minint.
     // Check for overflow and that it fits into Smi.
     __ CompareImmediate(R0, 0xC0000000);
-    __ b(&fall_through, MI);
-    __ SmiTag(R0);
-    __ Ret();
+    __ SmiTag(R0, PL);
+    __ bx(LR, PL);
     __ Bind(&fall_through);
   }
 }
 
 
 void Intrinsifier::Math_sqrt(Assembler* assembler) {
   if (TargetCPUFeatures::vfp_supported()) {
     Label fall_through, is_smi, double_op;
     TestLastArgumentIsDouble(assembler, &is_smi, &fall_through);
     // Argument is double and is in R0.
@@ skipping 455 matching lines @@
   Isolate* isolate = Isolate::Current();
   __ LoadImmediate(R1, reinterpret_cast<uword>(isolate));
   // Set return value to Isolate::current_tag_.
   __ ldr(R0, Address(R1, Isolate::current_tag_offset()));
   __ Ret();
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM