misched: Recompute priority queue when DFSResults are updated.
This was found by MSVC10's STL debug mode on a test from the test suite. Sadly
std::is_heap isn't standard so there is no way to assert this without writing
our own heap verify, which looks like overkill to me.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168885 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/MachineScheduler.cpp b/lib/CodeGen/MachineScheduler.cpp
index e27bb0d..b3e38f6 100644
--- a/lib/CodeGen/MachineScheduler.cpp
+++ b/lib/CodeGen/MachineScheduler.cpp
@@ -2117,6 +2117,8 @@
virtual void registerRoots() {
DFSResult.compute(ReadyQ);
ScheduledTrees.resize(DFSResult.getNumSubtrees());
+ // Restore the heap in ReadyQ with the updated DFS results.
+ std::make_heap(ReadyQ.begin(), ReadyQ.end(), Cmp);
}
/// Implement MachineSchedStrategy interface.