From: Eli Friedman <eli.friedman@gmail.com>
Date: Tue, 16 Aug 2011 00:41:37 +0000 (+0000)
Subject: After talking with Bill, it seems like the LandingPad handling here is likely
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=6437f2c2e282a7b2a046f0ed282cc7c536ccc48a;p=oota-llvm.git

After talking with Bill, it seems like the LandingPad handling here is likely
to be wrong (or at least somewhat suspect).  Leave a FIXME for Bill.




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137694 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Transforms/Utils/SimplifyCFG.cpp b/lib/Transforms/Utils/SimplifyCFG.cpp
index 2d60c35afb1..9f2c311601e 100644
--- a/lib/Transforms/Utils/SimplifyCFG.cpp
+++ b/lib/Transforms/Utils/SimplifyCFG.cpp
@@ -2266,10 +2266,7 @@ bool SimplifyCFGOpt::SimplifyUnreachable(UnreachableInst *UI) {
                  !isa<LandingPadInst>(BBI)) {
         break;
       }
-      // Note that deleting LandingPad's here is in fact okay, although it
-      // involves a bit of subtle reasoning. If this inst is a LandingPad,
-      // all the predecessors of this block will be the unwind edges of Invokes,
-      // and we can therefore guarantee this block will be erased.
+      // FIXME: Handling of LandingPadInst (landingpad) is suspicious.
     }
 
     // Delete this instruction (any uses are guaranteed to be dead)