Refactor lithium CheckSmi instruction into two separate instructions CheckSmi...

src/arm/lithium-codegen-arm.cc

Index: src/arm/lithium-codegen-arm.cc
===================================================================
--- src/arm/lithium-codegen-arm.cc	(revision 7203)
+++ src/arm/lithium-codegen-arm.cc	(working copy)
@@ -3525,12 +3525,18 @@
 
 void LCodeGen::DoCheckSmi(LCheckSmi* instr) {
   LOperand* input = instr->InputAt(0);
-  ASSERT(input->IsRegister());
   __ tst(ToRegister(input), Operand(kSmiTagMask));
-  DeoptimizeIf(instr->condition(), instr->environment());
+  DeoptimizeIf(ne, instr->environment());
 }
 
 
+void LCodeGen::DoCheckNonSmi(LCheckNonSmi* instr) {
+  LOperand* input = instr->InputAt(0);
+  __ tst(ToRegister(input), Operand(kSmiTagMask));
+  DeoptimizeIf(eq, instr->environment());
+}
+
+
 void LCodeGen::DoCheckInstanceType(LCheckInstanceType* instr) {
   Register input = ToRegister(instr->InputAt(0));
   Register scratch = scratch0();