commit a5e04816bd3e055c1ac97cc22a2035883ec763c6
author Dan Gohman <gohman@apple.com> Mon Sep 14 23:39:10 2009 +0000
committer Dan Gohman <gohman@apple.com> Mon Sep 14 23:39:10 2009 +0000
tree dabb1141b0c57693d16f4653eb6c7232320cb3bb
parent 713985a2dff2024cc0544f497714e239a01a6251

When extending a memset range past the front, set the alignment of the
memset region to the alignment of the new start address.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81810 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/Scalar/MemCpyOptimizer.cpp

diff --git a/lib/Transforms/Scalar/MemCpyOptimizer.cpp b/lib/Transforms/Scalar/MemCpyOptimizer.cpp
index 389b3b7..b131384 100644
--- a/lib/Transforms/Scalar/MemCpyOptimizer.cpp
+++ b/lib/Transforms/Scalar/MemCpyOptimizer.cpp
@@ -273,6 +273,7 @@
   if (Start < I->Start) {
     I->Start = Start;
     I->StartPtr = SI->getPointerOperand();
+    I->Alignment = SI->getAlignment();
   }
     
   // Now we know that Start <= I->End and Start >= I->Start (so the startpoint