| 1 | //===- llvm/AttributeMask.h - Mask for Attributes ---------------*- C++ -*-===// |
|---|---|
| 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 file declares the AttributeMask class. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
| 14 | #ifndef LLVM_IR_ATTRIBUTEMASK_H |
| 15 | #define LLVM_IR_ATTRIBUTEMASK_H |
| 16 | |
| 17 | #include "llvm/ADT/SmallString.h" |
| 18 | #include "llvm/IR/Attributes.h" |
| 19 | #include <bitset> |
| 20 | #include <cassert> |
| 21 | #include <set> |
| 22 | |
| 23 | namespace llvm { |
| 24 | |
| 25 | //===----------------------------------------------------------------------===// |
| 26 | /// \class |
| 27 | /// This class stores enough information to efficiently remove some attributes |
| 28 | /// from an existing AttrBuilder, AttributeSet or AttributeList. |
| 29 | class AttributeMask { |
| 30 | std::bitset<Attribute::EndAttrKinds> Attrs; |
| 31 | std::set<SmallString<32>, std::less<>> TargetDepAttrs; |
| 32 | |
| 33 | public: |
| 34 | AttributeMask() = default; |
| 35 | AttributeMask(const AttributeMask &) = delete; |
| 36 | AttributeMask(AttributeMask &&) = default; |
| 37 | |
| 38 | AttributeMask(AttributeSet AS) { |
| 39 | for (Attribute A : AS) |
| 40 | addAttribute(A); |
| 41 | } |
| 42 | |
| 43 | /// Add an attribute to the mask. |
| 44 | AttributeMask &addAttribute(Attribute::AttrKind Val) { |
| 45 | assert((unsigned)Val < Attribute::EndAttrKinds && |
| 46 | "Attribute out of range!"); |
| 47 | Attrs[Val] = true; |
| 48 | return *this; |
| 49 | } |
| 50 | |
| 51 | /// Add the Attribute object to the builder. |
| 52 | AttributeMask &addAttribute(Attribute A) { |
| 53 | if (A.isStringAttribute()) |
| 54 | addAttribute(A: A.getKindAsString()); |
| 55 | else |
| 56 | addAttribute(Val: A.getKindAsEnum()); |
| 57 | return *this; |
| 58 | } |
| 59 | |
| 60 | /// Add the target-dependent attribute to the builder. |
| 61 | AttributeMask &addAttribute(StringRef A) { |
| 62 | TargetDepAttrs.insert(x: A); |
| 63 | return *this; |
| 64 | } |
| 65 | |
| 66 | /// Return true if the builder has the specified attribute. |
| 67 | bool contains(Attribute::AttrKind A) const { |
| 68 | assert((unsigned)A < Attribute::EndAttrKinds && "Attribute out of range!"); |
| 69 | return Attrs[A]; |
| 70 | } |
| 71 | |
| 72 | /// Return true if the builder has the specified target-dependent |
| 73 | /// attribute. |
| 74 | bool contains(StringRef A) const { return TargetDepAttrs.count(x: A); } |
| 75 | |
| 76 | /// Return true if the mask contains the specified attribute. |
| 77 | bool contains(Attribute A) const { |
| 78 | if (A.isStringAttribute()) |
| 79 | return contains(A: A.getKindAsString()); |
| 80 | return contains(A: A.getKindAsEnum()); |
| 81 | } |
| 82 | }; |
| 83 | |
| 84 | } // end namespace llvm |
| 85 | |
| 86 | #endif // LLVM_IR_ATTRIBUTEMASK_H |
| 87 |