conservatively say that volatile stores read memory.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50872 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/VMCore/Instruction.cpp b/lib/VMCore/Instruction.cpp
index a446cc2..2316b48 100644
--- a/lib/VMCore/Instruction.cpp
+++ b/lib/VMCore/Instruction.cpp
@@ -226,13 +226,14 @@
default: return false;
case Instruction::Free:
case Instruction::VAArg:
+ case Instruction::Load:
return true;
case Instruction::Call:
return !cast<CallInst>(this)->doesNotAccessMemory();
case Instruction::Invoke:
return !cast<InvokeInst>(this)->doesNotAccessMemory();
- case Instruction::Load:
- return true;
+ case Instruction::Store:
+ return cast<StoreInst>(this)->isVolatile();
}
}