From e9fae09dcbe6761c0969119d67100fbf10d47c36 Mon Sep 17 00:00:00 2001
From: Dan Gohman <gohman@apple.com>
Date: Mon, 16 Aug 2010 14:41:14 +0000
Subject: Instead, teach SimplifyCFG to trim non-address-taken blocks from
 indirectbr destination lists.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111122 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Transforms/Utils/SimplifyCFG.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'lib/Transforms/Utils/SimplifyCFG.cpp')

diff --git a/lib/Transforms/Utils/SimplifyCFG.cpp b/lib/Transforms/Utils/SimplifyCFG.cpp
index db719a0..28d7afb 100644
--- a/lib/Transforms/Utils/SimplifyCFG.cpp
+++ b/lib/Transforms/Utils/SimplifyCFG.cpp
@@ -2057,12 +2057,13 @@ bool SimplifyCFGOpt::run(BasicBlock *BB) {
         return true;
       }
     }
-  } else if (IndirectBrInst *IBI = dyn_cast<IndirectBrInst>(BB->getTerminator())) {
+  } else if (IndirectBrInst *IBI =
+               dyn_cast<IndirectBrInst>(BB->getTerminator())) {
     // Eliminate redundant destinations.
     SmallPtrSet<Value *, 8> Succs;
     for (unsigned i = 0, e = IBI->getNumDestinations(); i != e; ++i) {
       BasicBlock *Dest = IBI->getDestination(i);
-      if (!Succs.insert(Dest)) {
+      if (!Dest->hasAddressTaken() || !Succs.insert(Dest)) {
         Dest->removePredecessor(BB);
         IBI->removeDestination(i);
         --i; --e;
-- 
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