From c095116710d06f632205c726fa15dbbe8f17e06c Mon Sep 17 00:00:00 2001
From: Eli Friedman <eli.friedman@gmail.com>
Date: Thu, 9 Jun 2011 18:55:00 +0000
Subject: [PATCH] Add a check to make sure we don't crash with strange
 configurations where we do fast-isel, then try to fold instructions. PR10092.

llvm-svn: 132789
---
 llvm/lib/Target/X86/X86InstrInfo.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/llvm/lib/Target/X86/X86InstrInfo.cpp b/llvm/lib/Target/X86/X86InstrInfo.cpp
index 18d71da47410..f98497f654b1 100644
--- a/llvm/lib/Target/X86/X86InstrInfo.cpp
+++ b/llvm/lib/Target/X86/X86InstrInfo.cpp
@@ -2392,6 +2392,10 @@ MachineInstr* X86InstrInfo::foldMemoryOperandImpl(MachineFunction &MF,
       return 0;
     }
 
+  // Conservatively fail out for loads without a memoperand.
+  if (LoadMI->memoperands_empty())
+    return 0;
+
   // Determine the alignment of the load.
   unsigned Alignment = 0;
   if (LoadMI->hasOneMemOperand())