From fc243d54d2048bec081a6c0257288306960f3e49 Mon Sep 17 00:00:00 2001
From: Nick Lewycky <nicholas@mxc.ca>
Date: Mon, 1 Sep 2014 06:03:11 +0000
Subject: Ignore lifetime intrinsics in use list for MemCpyOptimizer. Patch by
 Luqman Aden, review by Hal Finkel.

llvm-svn: 216865
---
 llvm/lib/Transforms/Scalar/MemCpyOptimizer.cpp | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'llvm/lib/Transforms')

diff --git a/llvm/lib/Transforms/Scalar/MemCpyOptimizer.cpp b/llvm/lib/Transforms/Scalar/MemCpyOptimizer.cpp
index 7c184a4ad2c..b1a2ed39f24 100644
--- a/llvm/lib/Transforms/Scalar/MemCpyOptimizer.cpp
+++ b/llvm/lib/Transforms/Scalar/MemCpyOptimizer.cpp
@@ -679,6 +679,10 @@ bool MemCpyOpt::performCallSlotOptzn(Instruction *cpy,
           srcUseList.push_back(UU);
       else
         return false;
+    } else if (const IntrinsicInst *IT = dyn_cast<IntrinsicInst>(U)) {
+      if (IT->getIntrinsicID() != Intrinsic::lifetime_start &&
+          IT->getIntrinsicID() != Intrinsic::lifetime_end)
+        continue;
     } else if (U != C && U != cpy) {
       return false;
     }
-- 
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