Sign extend the dehoisted key at the definition point for x64 port only; for x32 port, we need to si

src/x64/lithium-codegen-x64.cc

Index: src/x64/lithium-codegen-x64.cc
diff --git a/src/x64/lithium-codegen-x64.cc b/src/x64/lithium-codegen-x64.cc
index 75ba04e48170f0ed94975dc180d28f5cd9625ae3..9d59aab08d947a678430025d066229027533e3eb 100644
--- a/src/x64/lithium-codegen-x64.cc
+++ b/src/x64/lithium-codegen-x64.cc
@@ -275,6 +275,7 @@ void LCodeGen::GenerateBodyInstructionPost(LInstruction* instr) {
   }
 
   if (instr->HasResult() && instr->MustSignExtendResult(chunk())) {
+    ASSERT(kPointerSize == kInt64Size);

[Jakob Kummerow, 2014/06/10 12:01:17]

Please use STATIC_ASSERT when you can.

[haitao.feng, 2014/06/11 02:44:22]

Done.

     if (instr->result()->IsRegister()) {
       Register result_reg = ToRegister(instr->result());
       __ movsxlq(result_reg, result_reg);