[PATCH] D45940: [LoopUnroll] Fix potentially incorrect SCEV invalidation in UnrollRuntime

[Max Kazantsev via Phabricator via llvm-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rL330577: [LoopUnroll] Fix potentially incorrect SCEV invalidation in UnrollRuntime (authored by mkazantsev, committed by ).

Changed prior to commit:
  https://reviews.llvm.org/D45940?vs=143510&id=143521#toc

Repository:
  rL LLVM

https://reviews.llvm.org/D45940

Files:
  llvm/trunk/lib/Transforms/Utils/LoopUnrollRuntime.cpp


Index: llvm/trunk/lib/Transforms/Utils/LoopUnrollRuntime.cpp
===================================================================
--- llvm/trunk/lib/Transforms/Utils/LoopUnrollRuntime.cpp
+++ llvm/trunk/lib/Transforms/Utils/LoopUnrollRuntime.cpp
@@ -878,10 +878,9 @@
                   NewPreHeader, VMap, DT, LI, PreserveLCSSA);
   }
 
-  // If this loop is nested, then the loop unroller changes the code in the
-  // parent loop, so the Scalar Evolution pass needs to be run again.
-  if (Loop *ParentLoop = L->getParentLoop())
-    SE->forgetLoop(ParentLoop);
+  // If this loop is nested, then the loop unroller changes the code in the any
+  // of its parent loops, so the Scalar Evolution pass needs to be run again.
+  SE->forgetTopmostLoop(L);
 
   // Canonicalize to LoopSimplifyForm both original and remainder loops. We
   // cannot rely on the LoopUnrollPass to do this because it only does


-------------- next part --------------
A non-text attachment was scrubbed...
Name: D45940.143521.patch
Type: text/x-patch
Size: 903 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20180423/5137dd7a/attachment.bin>