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-rw-r--r--lib/CodeGen/LatencyPriorityQueue.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/CodeGen/LatencyPriorityQueue.cpp b/lib/CodeGen/LatencyPriorityQueue.cpp
index 86ef898932a7..8ffd51a550fc 100644
--- a/lib/CodeGen/LatencyPriorityQueue.cpp
+++ b/lib/CodeGen/LatencyPriorityQueue.cpp
@@ -134,6 +134,7 @@ SUnit *LatencyPriorityQueue::pop() {
void LatencyPriorityQueue::remove(SUnit *SU) {
assert(!Queue.empty() && "Queue is empty!");
std::vector<SUnit *>::iterator I = find(Queue, SU);
+ assert(I != Queue.end() && "Queue doesn't contain the SU being removed!");
if (I != std::prev(Queue.end()))
std::swap(*I, Queue.back());
Queue.pop_back();