[PATCH] D45970: [LoopInterchange] Do not change LI for BBs in child loops.

[Florian Hahn via Phabricator via llvm-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rL330653: [LoopInterchange] Do not change LI for BBs in child loops. (authored by fhahn, committed by ).

Changed prior to commit:
  https://reviews.llvm.org/D45970?vs=143579&id=143653#toc

Repository:
  rL LLVM

https://reviews.llvm.org/D45970

Files:
  llvm/trunk/lib/Transforms/Scalar/LoopInterchange.cpp


Index: llvm/trunk/lib/Transforms/Scalar/LoopInterchange.cpp
===================================================================
--- llvm/trunk/lib/Transforms/Scalar/LoopInterchange.cpp
+++ llvm/trunk/lib/Transforms/Scalar/LoopInterchange.cpp
@@ -1220,6 +1220,9 @@
   BasicBlock *OuterHeader = NewOuter->getHeader();
   BasicBlock *OuterLatch = NewOuter->getLoopLatch();
   for (BasicBlock *BB : OrigInnerBBs) {
+    // Nothing will change for BBs in child loops.
+    if (LI->getLoopFor(BB) != NewOuter)
+      continue;
     // Remove the new outer loop header and latch from the new inner loop.
     if (BB == OuterHeader || BB == OuterLatch)
       NewInner->removeBlockFromLoop(BB);


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