Invoke SimplifyIndVar when we partially unroll a loop. Fixes PR10534.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137203 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Scalar/LoopUnrollPass.cpp b/lib/Transforms/Scalar/LoopUnrollPass.cpp
index 6d7901f..94afff6 100644
--- a/lib/Transforms/Scalar/LoopUnrollPass.cpp
+++ b/lib/Transforms/Scalar/LoopUnrollPass.cpp
@@ -79,6 +79,7 @@
AU.addPreservedID(LoopSimplifyID);
AU.addRequiredID(LCSSAID);
AU.addPreservedID(LCSSAID);
+ AU.addRequired<ScalarEvolution>();
AU.addPreserved<ScalarEvolution>();
// FIXME: Loop unroll requires LCSSA. And LCSSA requires dom info.
// If loop unroll does not preserve dom info then LCSSA pass on next
@@ -187,12 +188,8 @@
}
// Unroll the loop.
- Function *F = L->getHeader()->getParent();
if (!UnrollLoop(L, Count, TripCount, TripMultiple, LI, &LPM))
return false;
- // FIXME: Reconstruct dom info, because it is not preserved properly.
- if (DominatorTree *DT = getAnalysisIfAvailable<DominatorTree>())
- DT->runOnFunction(*F);
return true;
}