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-rw-r--r--llvm/lib/CodeGen/MachineCopyPropagation.cpp4
1 files changed, 3 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/MachineCopyPropagation.cpp b/llvm/lib/CodeGen/MachineCopyPropagation.cpp
index c316b167059bc..70d6dcc2e3e29 100644
--- a/llvm/lib/CodeGen/MachineCopyPropagation.cpp
+++ b/llvm/lib/CodeGen/MachineCopyPropagation.cpp
@@ -51,6 +51,7 @@
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SetVector.h"
+#include "llvm/ADT/SmallSet.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/ADT/iterator_range.h"
@@ -113,7 +114,8 @@ public:
// Since Reg might be a subreg of some registers, only invalidate Reg is not
// enough. We have to find the COPY defines Reg or registers defined by Reg
// and invalidate all of them.
- DenseSet<unsigned> RegsToInvalidate{Reg};
+ SmallSet<unsigned, 8> RegsToInvalidate;
+ RegsToInvalidate.insert(Reg);
for (MCRegUnitIterator RUI(Reg, &TRI); RUI.isValid(); ++RUI) {
auto I = Copies.find(*RUI);
if (I != Copies.end()) {