From f5d9a1512c3152674d3503f3fc75a2b2cd581037 Mon Sep 17 00:00:00 2001
From: "Duncan P. N. Exon Smith" <dexonsmith@apple.com>
Date: Tue, 15 Apr 2014 17:48:15 +0000
Subject: [PATCH] LTO: Add more loop simplification passes to LTO

Similar to r202051, add missing loop simplification passes to the LTO
optimization pipeline.

Patch by Rafael Espindola.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206306 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Transforms/IPO/PassManagerBuilder.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/Transforms/IPO/PassManagerBuilder.cpp b/lib/Transforms/IPO/PassManagerBuilder.cpp
index 4a28b34468b..76f7c1098b0 100644
--- a/lib/Transforms/IPO/PassManagerBuilder.cpp
+++ b/lib/Transforms/IPO/PassManagerBuilder.cpp
@@ -334,7 +334,9 @@ void PassManagerBuilder::populateLTOPassManager(PassManagerBase &PM,
   // Nuke dead stores.
   PM.add(createDeadStoreEliminationPass());
 
-  // More loops are countable try to vectorize them.
+  // More loops are countable; try to optimize them.
+  PM.add(createIndVarSimplifyPass());
+  PM.add(createLoopDeletionPass());
   PM.add(createLoopVectorizePass(true, true));
 
   // Cleanup and simplify the code after the scalar optimizations.