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| author | Dhruv Chawla <44582521+dc03@users.noreply.github.com> | 2023-07-20 10:57:19 +0530 |
|---|---|---|
| committer | Dhruv Chawla <44582521+dc03@users.noreply.github.com> | 2023-09-20 12:03:36 +0530 |
| commit | 0f152a55d3e4e71f7c795bf555e40c8895b97077 (patch) | |
| tree | 617b5e19d2a44e806b0df17eb0ab5107c4b7082c /llvm/lib/Passes/PassBuilderPipelines.cpp | |
| parent | 3978f37c0f1e368849ff594d9d603ec600010f7e (diff) | |
| download | llvm-0f152a55d3e4e71f7c795bf555e40c8895b97077.zip llvm-0f152a55d3e4e71f7c795bf555e40c8895b97077.tar.gz llvm-0f152a55d3e4e71f7c795bf555e40c8895b97077.tar.bz2 | |
[InferAlignment] Implement InferAlignmentPass
This pass aims to infer alignment for instructions as a separate pass,
to reduce redundant work done by InstCombine running multiple times. It
runs late in the pipeline, just before the back-end passes where this
information is most useful.
Differential Revision: https://reviews.llvm.org/D158529
Diffstat (limited to 'llvm/lib/Passes/PassBuilderPipelines.cpp')
| -rw-r--r-- | llvm/lib/Passes/PassBuilderPipelines.cpp | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/llvm/lib/Passes/PassBuilderPipelines.cpp b/llvm/lib/Passes/PassBuilderPipelines.cpp index b12b4ee3..529743c 100644 --- a/llvm/lib/Passes/PassBuilderPipelines.cpp +++ b/llvm/lib/Passes/PassBuilderPipelines.cpp @@ -88,6 +88,7 @@ #include "llvm/Transforms/Scalar/Float2Int.h" #include "llvm/Transforms/Scalar/GVN.h" #include "llvm/Transforms/Scalar/IndVarSimplify.h" +#include "llvm/Transforms/Scalar/InferAlignment.h" #include "llvm/Transforms/Scalar/InstSimplifyPass.h" #include "llvm/Transforms/Scalar/JumpThreading.h" #include "llvm/Transforms/Scalar/LICM.h" @@ -274,6 +275,11 @@ cl::opt<bool> EnableMemProfContextDisambiguation( "enable-memprof-context-disambiguation", cl::init(false), cl::Hidden, cl::ZeroOrMore, cl::desc("Enable MemProf context disambiguation")); +cl::opt<bool> EnableInferAlignmentPass( + "enable-infer-alignment-pass", cl::init(false), cl::Hidden, cl::ZeroOrMore, + cl::desc("Enable the InferAlignment pass, disabling alignment inference in " + "InstCombine")); + PipelineTuningOptions::PipelineTuningOptions() { LoopInterleaving = true; LoopVectorization = true; @@ -1140,6 +1146,8 @@ void PassBuilder::addVectorPasses(OptimizationLevel Level, FPM.addPass(LoopVectorizePass( LoopVectorizeOptions(!PTO.LoopInterleaving, !PTO.LoopVectorization))); + if (EnableInferAlignmentPass) + FPM.addPass(InferAlignmentPass()); if (IsFullLTO) { // The vectorizer may have significantly shortened a loop body; unroll // again. Unroll small loops to hide loop backedge latency and saturate any @@ -1257,6 +1265,8 @@ void PassBuilder::addVectorPasses(OptimizationLevel Level, FPM.addPass(SROAPass(SROAOptions::PreserveCFG)); } + if (EnableInferAlignmentPass) + FPM.addPass(InferAlignmentPass()); FPM.addPass(InstCombinePass()); // This is needed for two reasons: |