73 lines
2.7 KiB
C++
73 lines
2.7 KiB
C++
//===- Scalarizer.h --- Scalarize vector operations -----------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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/// \file
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/// This pass converts vector operations into scalar operations (or, optionally,
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/// operations on smaller vector widths), in order to expose optimization
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/// opportunities on the individual scalar operations.
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/// It is mainly intended for targets that do not have vector units, but it
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/// may also be useful for revectorizing code to different vector widths.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TRANSFORMS_SCALAR_SCALARIZER_H
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#define LLVM_TRANSFORMS_SCALAR_SCALARIZER_H
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#include "llvm/IR/PassManager.h"
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#include "llvm/Support/Compiler.h"
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namespace llvm {
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class Function;
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class FunctionPass;
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struct ScalarizerPassOptions {
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/// Instruct the scalarizer pass to attempt to keep values of a minimum number
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/// of bits.
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/// Split vectors larger than this size into fragments, where each fragment is
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/// either a vector no larger than this size or a scalar.
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///
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/// Instructions with operands or results of different sizes that would be
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/// split into a different number of fragments are currently left as-is.
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unsigned ScalarizeMinBits = 0;
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/// Allow the scalarizer pass to scalarize insertelement/extractelement with
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/// variable index.
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bool ScalarizeVariableInsertExtract = true;
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/// Allow the scalarizer pass to scalarize loads and store
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///
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/// This is disabled by default because having separate loads and stores makes
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/// it more likely that the -combiner-alias-analysis limits will be reached.
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bool ScalarizeLoadStore = false;
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};
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class ScalarizerPass : public OptionalPassInfoMixin<ScalarizerPass> {
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ScalarizerPassOptions Options;
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public:
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ScalarizerPass() = default;
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ScalarizerPass(const ScalarizerPassOptions &Options) : Options(Options) {}
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LLVM_ABI PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
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void setScalarizeVariableInsertExtract(bool Value) {
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Options.ScalarizeVariableInsertExtract = Value;
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}
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void setScalarizeLoadStore(bool Value) { Options.ScalarizeLoadStore = Value; }
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void setScalarizeMinBits(unsigned Value) { Options.ScalarizeMinBits = Value; }
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};
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/// Create a legacy pass manager instance of the Scalarizer pass
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LLVM_ABI FunctionPass *createScalarizerPass(
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const ScalarizerPassOptions &Options = ScalarizerPassOptions());
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}
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#endif /* LLVM_TRANSFORMS_SCALAR_SCALARIZER_H */
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