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-rw-r--r--lib/CodeGen/PreAllocSplitting.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/CodeGen/PreAllocSplitting.cpp b/lib/CodeGen/PreAllocSplitting.cpp
index eb19be12ce..997e82f11d 100644
--- a/lib/CodeGen/PreAllocSplitting.cpp
+++ b/lib/CodeGen/PreAllocSplitting.cpp
@@ -1154,7 +1154,7 @@ PreAllocSplitting::SplitRegLiveIntervals(const TargetRegisterClass **RCs,
// codegen is not modelling. Ignore these barriers for now.
if (!TII->isSafeToMoveRegClassDefs(*RC))
continue;
- std::vector<unsigned> &VRs = MRI->getRegClassVirtRegs(*RC);
+ const std::vector<unsigned> &VRs = MRI->getRegClassVirtRegs(*RC);
for (unsigned i = 0, e = VRs.size(); i != e; ++i) {
unsigned Reg = VRs[i];
if (!LIs->hasInterval(Reg))