[MemorySSA] Teach LoopSimplify to preserve MemorySSA.
Summary:
Preserve MemorySSA in LoopSimplify, in the old pass manager, if the analysis is available.
Do not preserve it in the new pass manager.
Update tests.
Subscribers: nemanjai, jlebar, javed.absar, Prazek, kbarton, zzheng, jsji, llvm-commits, george.burgess.iv, chandlerc
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D60833
llvm-svn: 360270
diff --git a/llvm/lib/Transforms/Utils/LoopUnroll.cpp b/llvm/lib/Transforms/Utils/LoopUnroll.cpp
index 9a3c917..d8ac42b 100644
--- a/llvm/lib/Transforms/Utils/LoopUnroll.cpp
+++ b/llvm/lib/Transforms/Utils/LoopUnroll.cpp
@@ -884,11 +884,11 @@
// TODO: That potentially might be compile-time expensive. We should try
// to fix the loop-simplified form incrementally.
- simplifyLoop(OuterL, DT, LI, SE, AC, PreserveLCSSA);
+ simplifyLoop(OuterL, DT, LI, SE, AC, nullptr, PreserveLCSSA);
} else {
// Simplify loops for which we might've broken loop-simplify form.
for (Loop *SubLoop : LoopsToSimplify)
- simplifyLoop(SubLoop, DT, LI, SE, AC, PreserveLCSSA);
+ simplifyLoop(SubLoop, DT, LI, SE, AC, nullptr, PreserveLCSSA);
}
}