From fa6db90164459924a31eb590de0279ba4bf43af8 Mon Sep 17 00:00:00 2001
From: Sean Silva <chisophugis@gmail.com>
Date: Sun, 3 Jul 2016 03:35:06 +0000
Subject: PR28400: Partly undo r274440 to bring test-suite back to life with
 the new PM

PR28400 seems to be not an isolated issue, but a general problem related
to caching analyses. We will need to discuss on llvm-dev.

A test case is in the PR.

llvm-svn: 274457
---
 llvm/lib/Transforms/Scalar/JumpThreading.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'llvm/lib/Transforms/Scalar/JumpThreading.cpp')

diff --git a/llvm/lib/Transforms/Scalar/JumpThreading.cpp b/llvm/lib/Transforms/Scalar/JumpThreading.cpp
index bb3352c91a4..8e6020bb22e 100644
--- a/llvm/lib/Transforms/Scalar/JumpThreading.cpp
+++ b/llvm/lib/Transforms/Scalar/JumpThreading.cpp
@@ -151,7 +151,8 @@ PreservedAnalyses JumpThreadingPass::run(Function &F,
   if (!Changed)
     return PreservedAnalyses::all();
   PreservedAnalyses PA;
-  PA.preserve<LazyValueAnalysis>();
+  // FIXME: Not preserving LVI! We need it to be invalidated so that we
+  // don't run into issues like PR28400. Is there a better solution?
   PA.preserve<GlobalsAA>();
   return PA;
 }
-- 
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