From 10c14a4b14b80501350904fda2217766590fcb8b Mon Sep 17 00:00:00 2001
From: Iris Hsiao <ihsiao@mozilla.com>
Date: Mon, 7 Nov 2016 17:46:56 +0800
Subject: [PATCH] Backed out changeset 969ad213c983 (bug 1314438) for bustage
 CLOSED TREE

---
 js/src/jit/MIR.cpp            | 6 ++----
 js/src/jit/ValueNumbering.cpp | 6 ++----
 2 files changed, 4 insertions(+), 8 deletions(-)

diff --git a/js/src/jit/MIR.cpp b/js/src/jit/MIR.cpp
index f1a8970ce361..9421e7a28986 100644
--- a/js/src/jit/MIR.cpp
+++ b/js/src/jit/MIR.cpp
@@ -2390,8 +2390,7 @@ MPhi::foldsTernary(TempAllocator& alloc)
     // - fold testArg ? testArg : 0 to testArg
     // - fold testArg ? 0 : testArg to 0
     if (testArg->type() == MIRType::Int32 && c->numberToDouble() == 0) {
-        if (DeadIfUnused(testArg))
-            testArg->setGuardRangeBailoutsUnchecked();
+        testArg->setGuardRangeBailoutsUnchecked();
 
         // When folding to the constant we need to hoist it.
         if (trueDef == c && !c->block()->dominates(block()))
@@ -4394,8 +4393,7 @@ MCompare::tryFoldEqualOperands(bool* result)
             return false;
     }
 
-    if (DeadIfUnused(lhs()))
-        lhs()->setGuardRangeBailoutsUnchecked();
+    lhs()->setGuardRangeBailoutsUnchecked();
 
     *result = (jsop() == JSOP_STRICTEQ);
     return true;
diff --git a/js/src/jit/ValueNumbering.cpp b/js/src/jit/ValueNumbering.cpp
index 470ddf9aa007..a62be6eb9911 100644
--- a/js/src/jit/ValueNumbering.cpp
+++ b/js/src/jit/ValueNumbering.cpp
@@ -796,10 +796,8 @@ ValueNumberer::visitDefinition(MDefinition* def)
         // needed, so we can clear |def|'s guard flag and let it be discarded.
         def->setNotGuardUnchecked();
 
-        if (def->isGuardRangeBailouts()) {
-            if (DeadIfUnused(sim))
-                sim->setGuardRangeBailoutsUnchecked();
-        }
+        if (def->isGuardRangeBailouts())
+            sim->setGuardRangeBailoutsUnchecked();
 
         if (DeadIfUnused(def)) {
             if (!discardDefsRecursively(def))