[PATCH] D125670: [LSR] Early exit for RateFormula when it is already losing. NFC

[Yueh-Ting (eop) Chen via Phabricator via llvm-commits]

This revision was landed with ongoing or failed builds.
This revision was automatically updated to reflect the committed changes.
Closed by commit rG6eab5cade714: [LSR] Early exit for RateFormula when it is already losing. NFC (authored by eopXD).

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D125670/new/

https://reviews.llvm.org/D125670

Files:
  llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp


Index: llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp
===================================================================
--- llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp
+++ llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp
@@ -1355,6 +1355,8 @@
                        const DenseSet<const SCEV *> &VisitedRegs,
                        const LSRUse &LU,
                        SmallPtrSetImpl<const SCEV *> *LoserRegs) {
+  if (isLoser())
+    return;
   assert(F.isCanonical(*L) && "Cost is accurate only for canonical formula");
   // Tally up the registers.
   unsigned PrevAddRecCost = C.AddRecCost;


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