From ffbee86b8ee5c6d098c172fde955457a716ebd89 Mon Sep 17 00:00:00 2001
From: Devang Patel <dpatel@apple.com>
Date: Wed, 18 Apr 2007 01:19:55 +0000
Subject: [PATCH] Cache DT[*SI] lookup.

llvm-svn: 36239
---
 lib/Analysis/PostDominators.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/Analysis/PostDominators.cpp b/lib/Analysis/PostDominators.cpp
index b239596163f..add25fdf42f 100644
--- a/lib/Analysis/PostDominators.cpp
+++ b/lib/Analysis/PostDominators.cpp
@@ -282,10 +282,12 @@ PostDominanceFrontier::calculate(const PostDominatorTree &DT,
 
   if (BB)
     for (pred_iterator SI = pred_begin(BB), SE = pred_end(BB);
-         SI != SE; ++SI)
+         SI != SE; ++SI) {
       // Does Node immediately dominate this predecessor?
-      if (DT[*SI] && DT[*SI]->getIDom() != Node)
+      DominatorTree::Node *SINode = DT[*SI];
+      if (SINode && SINode->getIDom() != Node)
         S.insert(*SI);
+    }
 
   // At this point, S is DFlocal.  Now we union in DFup's of our children...
   // Loop through and visit the nodes that Node immediately dominates (Node's