From 87e3341ff699682938cdcf941f39aee2e25fa898 Mon Sep 17 00:00:00 2001
From: Chad Rosier <mcrosier@codeaurora.org>
Date: Tue, 9 Feb 2016 20:18:07 +0000
Subject: [PATCH] [AArch64] Add an assert to ensure we don't scale an offset
 that can't be scaled.

llvm-svn: 260272
---
 llvm/lib/Target/AArch64/AArch64LoadStoreOptimizer.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/llvm/lib/Target/AArch64/AArch64LoadStoreOptimizer.cpp b/llvm/lib/Target/AArch64/AArch64LoadStoreOptimizer.cpp
index f85d6a8f2dc9..d07ef3cecccd 100644
--- a/llvm/lib/Target/AArch64/AArch64LoadStoreOptimizer.cpp
+++ b/llvm/lib/Target/AArch64/AArch64LoadStoreOptimizer.cpp
@@ -842,8 +842,10 @@ AArch64LoadStoreOpt::mergePairedInsns(MachineBasicBlock::iterator I,
   }
   int OffsetImm = getLdStOffsetOp(RtMI).getImm();
   // Handle Unscaled.
-  if (IsUnscaled)
+  if (IsUnscaled) {
+    assert (!(OffsetImm % OffsetStride) && "Unscaled offset cannot be scaled.");
     OffsetImm /= OffsetStride;
+  }
 
   // Construct the new instruction.
   MachineInstrBuilder MIB;