From e1c77ca37a3c27064262bfdc22d0f3e62a4b789f Mon Sep 17 00:00:00 2001
From: Yaron Keren <yaron.keren@gmail.com>
Date: Sun, 14 Sep 2014 20:36:28 +0000
Subject: [PATCH] In DwarfEHPrepare, after all passes are run, RewindFunction
 may be a dangling pointer to a dead function. To make sure it's valid,
 doFinalization nullptrs RewindFunction just like the constructor and so it
 will be found on next run.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@217737 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/DwarfEHPrepare.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/CodeGen/DwarfEHPrepare.cpp b/lib/CodeGen/DwarfEHPrepare.cpp
index 705e5d657c3..75b74d9a6c3 100644
--- a/lib/CodeGen/DwarfEHPrepare.cpp
+++ b/lib/CodeGen/DwarfEHPrepare.cpp
@@ -51,6 +51,11 @@ namespace {
 
     bool runOnFunction(Function &Fn) override;
 
+    bool doFinalization(Module &M) override {
+      RewindFunction = nullptr;
+      return false;
+    }
+
     void getAnalysisUsage(AnalysisUsage &AU) const override { }
 
     const char *getPassName() const override {