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-rw-r--r--llvm/utils/TableGen/CodeGenRegisters.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/llvm/utils/TableGen/CodeGenRegisters.cpp b/llvm/utils/TableGen/CodeGenRegisters.cpp
index 609bf540e2e..6784d53a8cf 100644
--- a/llvm/utils/TableGen/CodeGenRegisters.cpp
+++ b/llvm/utils/TableGen/CodeGenRegisters.cpp
@@ -95,7 +95,7 @@ static void mergeRegUnits(CodeGenRegister::RegUnitList &MergedRU,
CodeGenRegister::RegUnitList LRU = MergedRU;
MergedRU.clear();
std::set_union(LRU.begin(), LRU.end(), RRU.begin(), RRU.end(),
- std::inserter(MergedRU, MergedRU.begin()));
+ std::back_inserter(MergedRU));
}
const CodeGenRegister::SubRegMap &
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