From eff0995922b10b69b14625b80582fee111a74965 Mon Sep 17 00:00:00 2001
From: "palfia@homejinni.com"
 <palfia@homejinni.com@ce2b1a6d-e550-0410-aec6-3dcde31c8c00>
Date: Fri, 24 May 2013 20:19:18 +0000
Subject: [PATCH] MIPS: DummyUse if Representation::Tagged()+Type::Smi() to
 Representation::Smi()

Port r14802 (d4a53e02)

BUG=

Review URL: https://codereview.chromium.org/16019009

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@14811 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
---
 src/mips/lithium-mips.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/mips/lithium-mips.cc b/src/mips/lithium-mips.cc
index 9ee5bfb..903d188 100644
--- a/src/mips/lithium-mips.cc
+++ b/src/mips/lithium-mips.cc
@@ -1781,6 +1781,9 @@ LInstruction* LChunkBuilder::DoChange(HChange* instr) {
     } else if (to.IsSmi()) {
       HValue* val = instr->value();
       LOperand* value = UseRegister(val);
+      if (val->type().IsSmi()) {
+        return DefineSameAsFirst(new(zone()) LDummyUse(value));
+      }
       return AssignEnvironment(
           DefineSameAsFirst(new(zone()) LCheckSmiAndReturn(value)));
     } else {
-- 
2.7.4