vendor/llvm-project/llvmorg-10-init-17466-ge26a78e7085

1 files changed, 3 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/MachinePipeliner.cpp b/llvm/lib/CodeGen/MachinePipeliner.cpp
index 89c9f6093a97..ef22caa877c9 100644
--- a/llvm/lib/CodeGen/MachinePipeliner.cpp
+++ b/llvm/lib/CodeGen/MachinePipeliner.cpp
@@ -1314,8 +1314,9 @@ void SwingSchedulerDAG::CopyToPhiMutation::apply(ScheduleDAGInstrs *DAG) {
     // Find the USEs of PHI. If the use is a PHI or REG_SEQUENCE, push back this
     // SUnit to the container.
     SmallVector<SUnit *, 8> UseSUs;
-    for (auto I = PHISUs.begin(); I != PHISUs.end(); ++I) {
-      for (auto &Dep : (*I)->Succs) {
+    // Do not use iterator based loop here as we are updating the container.
+    for (size_t Index = 0; Index < PHISUs.size(); ++Index) {
+      for (auto &Dep : PHISUs[Index]->Succs) {
         if (Dep.getKind() != SDep::Data)
           continue;