OpChain has subclasses, so add a virtual destructor.

Summary:
OpChain has subclasses, so add a virtual destructor.

This fixes an issue when deleting subclasses of OpChain (see MatchSMLAD() specifically) in r337701.

Reviewers: javed.absar

Subscribers: llvm-commits, SjoerdMeijer, samparker

Differential Revision: https://reviews.llvm.org/D49681

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337713 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/ARM/ARMParallelDSP.cpp b/lib/Target/ARM/ARMParallelDSP.cpp
index 24eb0bb2f870abc324b8499479f366fd33389276..f3d8da63d5689c6b73f534eec87e55a863acad90 100644 (file)
--- a/lib/Target/ARM/ARMParallelDSP.cpp
+++ b/lib/Target/ARM/ARMParallelDSP.cpp
@@ -64,6 +64,7 @@ namespace {
     bool          ReadOnly = true;
 
     OpChain(Instruction *I, ValueList &vl) : Root(I), AllValues(vl) { }
+    virtual ~OpChain() = default;
 
     void SetMemoryLocations() {
       const auto Size = MemoryLocation::UnknownSize;