[llvm] 70503ae - [DSE] Don't eagerly optimize MemorySSA uses

[Arthur Eubanks via llvm-commits]

Author: Arthur Eubanks
Date: 2023-07-06T14:09:47-07:00
New Revision: 70503aeea73852402a9a858028544a942070fc88

URL: https://github.com/llvm/llvm-project/commit/70503aeea73852402a9a858028544a942070fc88
DIFF: https://github.com/llvm/llvm-project/commit/70503aeea73852402a9a858028544a942070fc88.diff

LOG: [DSE] Don't eagerly optimize MemorySSA uses

Compile time improvements:
https://llvm-compile-time-tracker.com/compare.php?from=a4a2b62495a63516a4f782acff1b19361906546b&to=a408521f71702a5c5fb65077adc23413d8631cfc&stat=instructions:u

Reviewed By: nikic

Differential Revision: https://reviews.llvm.org/D152744

Added: 
    

Modified: 
    llvm/lib/Transforms/Scalar/DeadStoreElimination.cpp

Removed: 
    


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diff  --git a/llvm/lib/Transforms/Scalar/DeadStoreElimination.cpp b/llvm/lib/Transforms/Scalar/DeadStoreElimination.cpp
index d0c249f7360063..d3fbe49439a80b 100644
--- a/llvm/lib/Transforms/Scalar/DeadStoreElimination.cpp
+++ b/llvm/lib/Transforms/Scalar/DeadStoreElimination.cpp
@@ -2069,7 +2069,6 @@ static bool eliminateDeadStores(Function &F, AliasAnalysis &AA, MemorySSA &MSSA,
                                 const LoopInfo &LI) {
   bool MadeChange = false;
 
-  MSSA.ensureOptimizedUses();
   DSEState State(F, AA, MSSA, DT, PDT, AC, TLI, LI);
   // For each store:
   for (unsigned I = 0; I < State.MemDefs.size(); I++) {