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

src/ia32/lithium-ia32.cc

Index: src/ia32/lithium-ia32.cc
diff --git a/src/ia32/lithium-ia32.cc b/src/ia32/lithium-ia32.cc
index f41a18e7b1656c4d7d30c4720885e81539473e7b..e5b69c1b5ad15d66ba222d99c41065f5a02eeccf 100644
--- a/src/ia32/lithium-ia32.cc
+++ b/src/ia32/lithium-ia32.cc
@@ -738,15 +738,13 @@ LInstruction* LChunkBuilder::DoShift(Token::Value op,
     right = UseFixed(right_value, ecx);
   }
 
+  // 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 &&
-      !instr->CheckFlag(HInstruction::kUint32));
-    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;