commit 01a8391236b85c63c89f1c712f5e94e345008587
author Chris Lattner <sabre@nondot.org> Mon Sep 08 18:17:14 2003 +0000
committer Chris Lattner <sabre@nondot.org> Mon Sep 08 18:17:14 2003 +0000
tree fbe1343ab036e44cd7e49796bf2d0354fed96b79
parent c4e76944d7cb1db563b7fb56b6544c20e0bb255c

Do not hoist volatile loads

llvm-svn: 8399

llvm/lib/Transforms/Scalar/LICM.cpp

diff --git a/llvm/lib/Transforms/Scalar/LICM.cpp b/llvm/lib/Transforms/Scalar/LICM.cpp
index f2cf68b..4940566 100644
--- a/llvm/lib/Transforms/Scalar/LICM.cpp
+++ b/llvm/lib/Transforms/Scalar/LICM.cpp
@@ -316,7 +316,7 @@
 
 
 void LICM::visitLoadInst(LoadInst &LI) {
-  if (isLoopInvariant(LI.getOperand(0)) &&
+  if (isLoopInvariant(LI.getOperand(0)) && !LI.isVolatile() &&
       !pointerInvalidatedByLoop(LI.getOperand(0)) && SafeToHoist(LI)) {
     hoist(LI);
     ++NumHoistedLoads;