From: Dan Gohman <gohman@apple.com>
Date: Mon, 14 Dec 2009 17:10:44 +0000 (+0000)
Subject: Don't bother cleaning up if there's nothing to clean up.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=a77d588c752bbf5d339f674af50733c10b113d0a;p=oota-llvm.git

Don't bother cleaning up if there's nothing to clean up.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91288 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/lib/Transforms/Scalar/LoopStrengthReduce.cpp
index 12bb87a77dc..51cb3d66932 100644
--- a/lib/Transforms/Scalar/LoopStrengthReduce.cpp
+++ b/lib/Transforms/Scalar/LoopStrengthReduce.cpp
@@ -2754,14 +2754,14 @@ bool LoopStrengthReduce::runOnLoop(Loop *L, LPPassManager &LPM) {
     // After all sharing is done, see if we can adjust the loop to test against
     // zero instead of counting up to a maximum.  This is usually faster.
     OptimizeLoopCountIV(L);
-  }
 
-  // We're done analyzing this loop; release all the state we built up for it.
-  IVsByStride.clear();
+    // We're done analyzing this loop; release all the state we built up for it.
+    IVsByStride.clear();
 
-  // Clean up after ourselves
-  if (!DeadInsts.empty())
-    DeleteTriviallyDeadInstructions();
+    // Clean up after ourselves
+    if (!DeadInsts.empty())
+      DeleteTriviallyDeadInstructions();
+  }
 
   // At this point, it is worth checking to see if any recurrence PHIs are also
   // dead, so that we can remove them as well.