Fix DoDeferredNumberTagU to keep the value in xmm1 instead of xmm0 on x64.

src/arm/lithium-arm.cc

Index: src/arm/lithium-arm.cc
diff --git a/src/arm/lithium-arm.cc b/src/arm/lithium-arm.cc
index d461ee8d319a16ec4938e7df800e318efc3b14a8..e4616c9e2e033048f6169787724035c1404f349c 100644
--- a/src/arm/lithium-arm.cc
+++ b/src/arm/lithium-arm.cc
@@ -713,15 +713,13 @@ LInstruction* LChunkBuilder::DoShift(Token::Value op,
     right = UseRegisterAtStart(right_value);
   }
 
+  // Shift operations can only deoptimize if we do a logical shift
+  // by 0 and the result cannot be truncated to int32.
   bool does_deopt = false;
-
-  if (FLAG_opt_safe_uint32_operations) {
-    does_deopt = !instr->CheckFlag(HInstruction::kUint32);
-  } else {
-    // Shift operations can only deoptimize if we do a logical shift
-    // by 0 and the result cannot be truncated to int32.
-    bool may_deopt = (op == Token::SHR && constant_value == 0);
-    if (may_deopt) {
+  if (op == Token::SHR && constant_value == 0) {
+    if (FLAG_opt_safe_uint32_operations) {
+      does_deopt = !instr->CheckFlag(HInstruction::kUint32);
+    } else {
       for (HUseIterator it(instr->uses()); !it.Done(); it.Advance()) {
         if (!it.value()->CheckFlag(HValue::kTruncatingToInt32)) {
           does_deopt = true;