From: Chandler Carruth <chandlerc@gmail.com>
Date: Fri, 4 May 2012 11:17:06 +0000 (+0000)
Subject: Rather than trying to gracefully handle input sequences with repeated
X-Git-Tag: android-x86-6.0-r1~201^2~1656
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=50955031b81ef1abd54fecd587bee7959f7fa19d;p=android-x86%2Fexternal-llvm.git

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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156167 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Transforms/Utils/CodeExtractor.cpp b/lib/Transforms/Utils/CodeExtractor.cpp
index 0178c336d9e..4d82857c1b2 100644
--- a/lib/Transforms/Utils/CodeExtractor.cpp
+++ b/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();