From 11240d0fdd4e26b9035ccb31fe1f962580cdb19b Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Mon, 1 Dec 2008 03:58:38 +0000
Subject: [PATCH] The PreVerifier pass preserves everything.  In practice, this
 prevents the passmgr from adding yet-another domtree invocation for Verifier
 if there is already one live.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60326 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/VMCore/Verifier.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/VMCore/Verifier.cpp b/lib/VMCore/Verifier.cpp
index 366294138b7..27c640e9175 100644
--- a/lib/VMCore/Verifier.cpp
+++ b/lib/VMCore/Verifier.cpp
@@ -72,6 +72,10 @@ namespace {  // Anonymous namespace for class
 
     PreVerifier() : FunctionPass(&ID) { }
 
+    virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+      AU.setPreservesAll();
+    }
+
     // Check that the prerequisites for successful DominatorTree construction
     // are satisfied.
     bool runOnFunction(Function &F) {