[PATCH] D141590: [PassManager] Add some passes to the sequence of extra vector passes

[Tiehu Zhang via Phabricator via llvm-commits]

TiehuZhang created this revision.
TiehuZhang added reviewers: fhahn, sdesmalen, dmgreen, mdchen.
Herald added subscribers: StephenFan, hiraditya.
Herald added a project: All.
TiehuZhang requested review of this revision.
Herald added a project: LLVM.
Herald added a subscriber: llvm-commits.

When 'extra-vectorizer-passes' is enabled, many additional vector passes will be run, resulting in better IR. This patch adding LoopIdiomRecognizePass and IndVarSimplifyPass to the sequence after SimpleLoopUnswitchPass, which are useful for generating better IR. LoopIdiomRecognizePass can transform simple loops into a non-loop form, and IndVarSimplifyPass can transform induction variables into simpler forms (If possiable).


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D141590

Files:
  llvm/lib/Passes/PassBuilderPipelines.cpp


Index: llvm/lib/Passes/PassBuilderPipelines.cpp
===================================================================
--- llvm/lib/Passes/PassBuilderPipelines.cpp
+++ llvm/lib/Passes/PassBuilderPipelines.cpp
@@ -1135,6 +1135,8 @@
                          /*AllowSpeculation=*/true));
     LPM.addPass(SimpleLoopUnswitchPass(/* NonTrivial */ Level ==
                                        OptimizationLevel::O3));
+    LPM.addPass(LoopIdiomRecognizePass());
+    LPM.addPass(IndVarSimplifyPass());
     ExtraPasses.addPass(
         RequireAnalysisPass<OptimizationRemarkEmitterAnalysis, Function>());
     ExtraPasses.addPass(


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