From 80e051dfdede65678ac66f1552278338bc1a1b33 Mon Sep 17 00:00:00 2001 From: Owen Anderson Date: Mon, 28 Jul 2008 20:52:42 +0000 Subject: [PATCH] Don't remove volatile loads. Thanks to Duncan for noticing this one. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54144 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Transforms/Scalar/DeadStoreElimination.cpp | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/Transforms/Scalar/DeadStoreElimination.cpp b/lib/Transforms/Scalar/DeadStoreElimination.cpp index 0011d9566e3..b75d5c4be7e 100644 --- a/lib/Transforms/Scalar/DeadStoreElimination.cpp +++ b/lib/Transforms/Scalar/DeadStoreElimination.cpp @@ -183,7 +183,7 @@ bool DSE::runOnBasicBlock(BasicBlock &BB) { Instruction* dep = MD.getDependency(S); DominatorTree& DT = getAnalysis(); - if (S->getParent() == L->getParent() && + if (!S->isVolatile() && S->getParent() == L->getParent() && S->getPointerOperand() == L->getPointerOperand() && ( dep == MemoryDependenceAnalysis::None || dep == MemoryDependenceAnalysis::NonLocal || -- 2.34.1