1 //===- Scalarizer.h --- Scalarize vector operations -----------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 /// \file
10 /// This pass converts vector operations into scalar operations (or, optionally,
11 /// operations on smaller vector widths), in order to expose optimization
12 /// opportunities on the individual scalar operations.
13 /// It is mainly intended for targets that do not have vector units, but it
14 /// may also be useful for revectorizing code to different vector widths.
15 //
16 //===----------------------------------------------------------------------===//
17 
18 #ifndef LLVM_TRANSFORMS_SCALAR_SCALARIZER_H
19 #define LLVM_TRANSFORMS_SCALAR_SCALARIZER_H
20 
21 #include "llvm/IR/PassManager.h"
22 #include <optional>
23 
24 namespace llvm {
25 
26 class Function;
27 class FunctionPass;
28 
29 struct ScalarizerPassOptions {
30   // These options correspond 1:1 to cl::opt options defined in
31   // Scalarizer.cpp. When the cl::opt are specified, they take precedence.
32   // When the cl::opt are not specified, the present optional values allow to
33   // override the cl::opt's default values.
34   std::optional<bool> ScalarizeVariableInsertExtract;
35   std::optional<bool> ScalarizeLoadStore;
36   std::optional<unsigned> ScalarizeMinBits;
37 };
38 
39 class ScalarizerPass : public PassInfoMixin<ScalarizerPass> {
40   ScalarizerPassOptions Options;
41 
42 public:
43   ScalarizerPass() = default;
44   ScalarizerPass(const ScalarizerPassOptions &Options) : Options(Options) {}
45 
46   PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
47 
48   void setScalarizeVariableInsertExtract(bool Value) {
49     Options.ScalarizeVariableInsertExtract = Value;
50   }
51   void setScalarizeLoadStore(bool Value) { Options.ScalarizeLoadStore = Value; }
52   void setScalarizeMinBits(unsigned Value) { Options.ScalarizeMinBits = Value; }
53 };
54 
55 /// Create a legacy pass manager instance of the Scalarizer pass
56 FunctionPass *createScalarizerPass();
57 
58 }
59 
60 #endif /* LLVM_TRANSFORMS_SCALAR_SCALARIZER_H */
61