Rather than trying to gracefully handle input sequences with repeated

blocks, assert that this doesn't happen. We don't want to bother trying
to support this call pattern as it isn't necessary.

llvm-svn: 156167

1 files changed, 1 insertions, 1 deletions

diff --git a/llvm/lib/Transforms/Utils/CodeExtractor.cpp b/llvm/lib/Transforms/Utils/CodeExtractor.cpp
index 0178c336d9e..4d82857c1b2 100644
--- a/llvm/lib/Transforms/Utils/CodeExtractor.cpp
+++ b/llvm/lib/Transforms/Utils/CodeExtractor.cpp
@@ -74,7 +74,7 @@ buildExtractionBlockSet(ArrayRef<BasicBlock *> BBs) {
   for (ArrayRef<BasicBlock *>::iterator I = BBs.begin(), E = BBs.end();
        I != E; ++I) {
     if (!Result.insert(*I))
-      continue;
+      llvm_unreachable("Repeated basic blocks in extraction input");
 
     if (!isBlockValidForExtraction(**I)) {
       Result.clear();