From a530a4d92563fc15097b9fa66aa03aa9e41137fc Mon Sep 17 00:00:00 2001
From: Nick Lewycky <nicholas@mxc.ca>
Date: Tue, 2 Aug 2011 00:40:16 +0000
Subject: Bail from FastISel when we encounter a volatile memset intrinsic.
 Patch by Ivan Krasin!

llvm-svn: 136663
---
 llvm/lib/Target/X86/X86FastISel.cpp | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'llvm/lib/Target/X86/X86FastISel.cpp')

diff --git a/llvm/lib/Target/X86/X86FastISel.cpp b/llvm/lib/Target/X86/X86FastISel.cpp
index 24f4437ec7d..f5db6d28a24 100644
--- a/llvm/lib/Target/X86/X86FastISel.cpp
+++ b/llvm/lib/Target/X86/X86FastISel.cpp
@@ -1365,6 +1365,9 @@ bool X86FastISel::X86VisitIntrinsicCall(const IntrinsicInst &I) {
   case Intrinsic::memset: {
     const MemSetInst &MSI = cast<MemSetInst>(I);
 
+    if (MSI.isVolatile())
+      return false;
+
     unsigned SizeWidth = Subtarget->is64Bit() ? 64 : 32;
     if (!MSI.getLength()->getType()->isIntegerTy(SizeWidth))
       return false;
-- 
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