Allow empty Weights vector.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133265 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 2 insertions, 1 deletions

diff --git a/lib/CodeGen/MachineBasicBlock.cpp b/lib/CodeGen/MachineBasicBlock.cpp
index 613f0c4f7f..7d7bfb1fc3 100644
--- a/lib/CodeGen/MachineBasicBlock.cpp
+++ b/lib/CodeGen/MachineBasicBlock.cpp
@@ -776,7 +776,8 @@ uint32_t MachineBasicBlock::getSuccWeight(MachineBasicBlock *succ) {
 /// iterator
 MachineBasicBlock::weight_iterator MachineBasicBlock::
 getWeightIterator(MachineBasicBlock::succ_iterator I) {
-  assert(Weights.size() == Successors.size() && "Async weight list!");
+  assert((Weights.size() == Successors.size() || Weights.empty()) &&
+         "Async weight list!");
   size_t index = std::distance(Successors.begin(), I);
   assert(index < Weights.size() && "Not a current successor!");
   return Weights.begin() + index;