From a15e7eb29b74020084714047392886a32892227d Mon Sep 17 00:00:00 2001
From: Evan Cheng <evan.cheng@apple.com>
Date: Wed, 4 Jun 2008 09:17:16 +0000
Subject: [PATCH] LowerSubregs should not clobber any analysis.

llvm-svn: 51933
---
 llvm/lib/CodeGen/LowerSubregs.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/llvm/lib/CodeGen/LowerSubregs.cpp b/llvm/lib/CodeGen/LowerSubregs.cpp
index 0710a3530068..aaadda1cb1cc 100644
--- a/llvm/lib/CodeGen/LowerSubregs.cpp
+++ b/llvm/lib/CodeGen/LowerSubregs.cpp
@@ -30,6 +30,10 @@ namespace {
       return "Subregister lowering instruction pass";
     }
 
+    void getAnalysisUsage(AnalysisUsage &AU) const {
+      AU.setPreservesAll();
+    }
+
     /// runOnMachineFunction - pass entry point
     bool runOnMachineFunction(MachineFunction&);