[arm64] Fixed unnecessary environment assignment to LSmiTag instruction.

src/arm64/lithium-arm64.cc

Index: src/arm64/lithium-arm64.cc
diff --git a/src/arm64/lithium-arm64.cc b/src/arm64/lithium-arm64.cc
index fef51c669b0d9d639f90bf7b99feca89037dcdb6..dc28f8d9a284d1f5ab3bd36c8f6fe93b1b1a465d 100644
--- a/src/arm64/lithium-arm64.cc
+++ b/src/arm64/lithium-arm64.cc
@@ -1203,7 +1203,7 @@ LInstruction* LChunkBuilder::DoChange(HChange* instr) {
     } else if (to.IsSmi()) {
       LOperand* value = UseRegisterAtStart(val);
       LInstruction* result = DefineAsRegister(new(zone()) LSmiTag(value));
-      if (val->CheckFlag(HInstruction::kUint32)) {
+      if (instr->CheckFlag(HValue::kCanOverflow)) {
         result = AssignEnvironment(result);
       }
       return result;