From 55694940f464d792863ab52baefdd6f297bb0f89 Mon Sep 17 00:00:00 2001
From: Dan Gohman <sunfish@mozilla.com>
Date: Thu, 12 Jun 2014 15:47:36 -0700
Subject: [PATCH] Bug 1020482 - MLimitedTruncate instructions are movable.
 r=nbp

---
 js/src/jit/MIR.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/js/src/jit/MIR.h b/js/src/jit/MIR.h
index 892a2d90370f..88e89b6132e2 100644
--- a/js/src/jit/MIR.h
+++ b/js/src/jit/MIR.h
@@ -1027,8 +1027,8 @@ class MNop : public MNullaryInstruction
     }
 };
 
-// No-op instruction. This cannot be moved or eliminated, and is intended for
-// protecting the input against follow-up optimization.
+// Truncation barrier. This is intended for protecting its input against
+// follow-up truncation optimizations.
 class MLimitedTruncate : public MUnaryInstruction
 {
   public:
@@ -1043,6 +1043,7 @@ class MLimitedTruncate : public MUnaryInstruction
     {
         setResultType(input->type());
         setResultTypeSet(input->resultTypeSet());
+        setMovable();
     }
 
   public: