Thumb2 Backend: Make arithmetic instructions set condition codes by default

src/arm/assembler-arm-inl.h

Index: src/arm/assembler-arm-inl.h
diff --git a/src/arm/assembler-arm-inl.h b/src/arm/assembler-arm-inl.h
index 854b986bb1de44343e4954d7f5ac5196b1ab4775..c6168b9239d789935c6577e0dd45b91b4e455acf 100644
--- a/src/arm/assembler-arm-inl.h
+++ b/src/arm/assembler-arm-inl.h
@@ -575,10 +575,18 @@ void Assembler::set_target_address_at(Address pc, Address target) {
 }
 
 
-void Assembler::emit_it(Condition cond) {
+bool Assembler::emit_it(Condition cond) {
   if (cond != al) {
     it_thumb(cond, 1);
+    return true;
   }
+  return false;
+}
+
+
+bool Assembler::it_block_smode_check(bool is_in_it_block, SBitMode smode) {
+  return (is_in_it_block && smode != SetCC) ||
+         (!is_in_it_block && smode != LeaveCC);
 }