| 1 | //===-- NumberedValues.h - --------------------------------------*- C++ -*-===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #ifndef LLVM_ASMPARSER_NUMBEREDVALUES_H |
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| 10 | #define LLVM_ASMPARSER_NUMBEREDVALUES_H |
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| 11 | |
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| 12 | #include "llvm/ADT/DenseMap.h" |
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| 13 | |
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| 14 | namespace llvm { |
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| 15 | |
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| 16 | /// Mapping from value ID to value, which also remembers what the next unused |
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| 17 | /// ID is. |
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| 18 | template <class T> class NumberedValues { |
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| 19 | DenseMap<unsigned, T> Vals; |
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| 20 | unsigned NextUnusedID = 0; |
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| 21 | |
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| 22 | public: |
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| 23 | unsigned getNext() const { return NextUnusedID; } |
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| 24 | T get(unsigned ID) const { return Vals.lookup(ID); } |
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| 25 | void add(unsigned ID, T V) { |
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| 26 | assert(ID >= NextUnusedID && "Invalid value ID" ); |
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| 27 | Vals.insert({ID, V}); |
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| 28 | NextUnusedID = ID + 1; |
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| 29 | } |
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| 30 | }; |
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| 31 | |
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| 32 | } // end namespace llvm |
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| 33 | |
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| 34 | #endif |
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| 35 | |
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