commit b253a8b382824586066a299e1279838f41117e3b
author Chris Lattner <sabre@nondot.org> Sat Dec 29 07:15:45 2007 +0000
committer Chris Lattner <sabre@nondot.org> Sat Dec 29 07:15:45 2007 +0000
tree 4fe46ae87cf750f2ccc75358b566b9ff2bc59680
parent d60eedca018895df83968d052230129bc25731cb

make sure not to zap volatile stores, thanks a lot to Dale for noticing this!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45402 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/SelectionDAG/DAGCombiner.cpp

diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 0ee4557..cfa46e6 100644
--- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -4252,7 +4252,8 @@
   if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(Value)) {
     if (Chain.Val == Ld && Ld->getBasePtr() == Ptr &&
         ST->getAddressingMode() == ISD::UNINDEXED &&
-        ST->getStoredVT() == Ld->getLoadedVT()) {
+        ST->getStoredVT() == Ld->getLoadedVT() &&
+        !ST->isVolatile()) {
       // The store is dead, remove it.
       return Chain;
     }