From 0873e7d2186c97499aacda67eb2fea7ef4ccbcf3 Mon Sep 17 00:00:00 2001
From: Sean Silva <chisophugis@gmail.com>
Date: Mon, 8 Aug 2016 07:03:49 +0000
Subject: Add some comments linking back to PR28400.

Thanks to Mehdi for the suggestion!

llvm-svn: 277984
---
 llvm/lib/Transforms/IPO/FunctionAttrs.cpp | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'llvm/lib/Transforms/IPO/FunctionAttrs.cpp')

diff --git a/llvm/lib/Transforms/IPO/FunctionAttrs.cpp b/llvm/lib/Transforms/IPO/FunctionAttrs.cpp
index e4b86e9ca7d..6496f3abe5c 100644
--- a/llvm/lib/Transforms/IPO/FunctionAttrs.cpp
+++ b/llvm/lib/Transforms/IPO/FunctionAttrs.cpp
@@ -1274,6 +1274,8 @@ ReversePostOrderFunctionAttrsPass::run(Module &M, AnalysisManager<Module> &AM) {
 
   // CallGraphAnalysis holds AssertingVH and must be invalidated eagerly so
   // that other passes don't delete stuff from under it.
+  // FIXME: We need to invalidate this to avoid PR28400. Is there a better
+  // solution?
   AM.invalidate<CallGraphAnalysis>(M);
 
   if (!Changed)
-- 
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