Separated smi check from HBoundsCheck.

src/arm/lithium-codegen-arm.cc

Index: src/arm/lithium-codegen-arm.cc
diff --git a/src/arm/lithium-codegen-arm.cc b/src/arm/lithium-codegen-arm.cc
index 9fdb22b8d50114c43dba07cab931fa8403f0616f..8cb1210db187d768cb3ec75dea0ca1e64dd85e59 100644
--- a/src/arm/lithium-codegen-arm.cc
+++ b/src/arm/lithium-codegen-arm.cc
@@ -4327,28 +4327,9 @@ void LCodeGen::DoStoreNamedGeneric(LStoreNamedGeneric* instr) {
 }
 
 
-void LCodeGen::DeoptIfTaggedButNotSmi(LEnvironment* environment,
-                                      HValue* value,
-                                      LOperand* operand) {
-  if (value->representation().IsTagged() && !value->type().IsSmi()) {
-    if (operand->IsRegister()) {
-      __ tst(ToRegister(operand), Operand(kSmiTagMask));
-    } else {
-      __ mov(ip, ToOperand(operand));
-      __ tst(ip, Operand(kSmiTagMask));
-    }
-    DeoptimizeIf(ne, environment);
-  }
-}
-
-
 void LCodeGen::DoBoundsCheck(LBoundsCheck* instr) {
-  DeoptIfTaggedButNotSmi(instr->environment(),
-                         instr->hydrogen()->length(),
-                         instr->length());
-  DeoptIfTaggedButNotSmi(instr->environment(),
-                         instr->hydrogen()->index(),
-                         instr->index());
+  if (instr->hydrogen()->skip_check()) return;
+
   if (instr->index()->IsConstantOperand()) {
     int constant_index =
         ToInteger32(LConstantOperand::cast(instr->index()));
@@ -5318,6 +5299,22 @@ void LCodeGen::DoCheckSmi(LCheckSmi* instr) {
 }
 
 
+void LCodeGen::DoDeoptimizeIfTaggedIsNotSmi(
+    LDeoptimizeIfTaggedIsNotSmi* instr) {
+  if (instr->hydrogen_value()->representation().IsTagged() &&
+      !instr->hydrogen_value()->type().IsSmi()) {
+    LOperand* operand = instr->value();
+    if (operand->IsRegister()) {
+      __ tst(ToRegister(operand), Operand(kSmiTagMask));
+    } else {
+      __ mov(ip, ToOperand(operand));
+      __ tst(ip, Operand(kSmiTagMask));
+    }
+    DeoptimizeIf(ne, instr->environment());
+  }
+}
+
+
 void LCodeGen::DoCheckNonSmi(LCheckNonSmi* instr) {
   LOperand* input = instr->value();
   __ tst(ToRegister(input), Operand(kSmiTagMask));