From bc4fcbbc7b61e21f154ec3a4687178ec20a5f09b Mon Sep 17 00:00:00 2001
From: Bill Wendling <isanbard@gmail.com>
Date: Mon, 15 Aug 2011 18:22:00 +0000
Subject: [PATCH] Mark the SCC as "might unwind" if we run into a 'resume'
 instruction.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137627 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Transforms/IPO/PruneEH.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/Transforms/IPO/PruneEH.cpp b/lib/Transforms/IPO/PruneEH.cpp
index b7e63dc4484..cbb80f07508 100644
--- a/lib/Transforms/IPO/PruneEH.cpp
+++ b/lib/Transforms/IPO/PruneEH.cpp
@@ -101,8 +101,9 @@ bool PruneEH::runOnSCC(CallGraphSCC &SCC) {
       // Check to see if this function performs an unwind or calls an
       // unwinding function.
       for (Function::iterator BB = F->begin(), E = F->end(); BB != E; ++BB) {
-        if (CheckUnwind && isa<UnwindInst>(BB->getTerminator())) {
-          // Uses unwind!
+        if (CheckUnwind && (isa<UnwindInst>(BB->getTerminator()) ||
+                            isa<ResumeInst>(BB->getTerminator()))) {
+          // Uses unwind / resume!
           SCCMightUnwind = true;
         } else if (CheckReturn && isa<ReturnInst>(BB->getTerminator())) {
           SCCMightReturn = true;