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https://github.com/c64scene-ar/llvm-6502.git
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2669f9b34e
I initially used a `SmallVector<>` for `UseListOrder::Shuffle`, which was a silly choice. When I realized my error I quickly rolled a custom data structure. This commit simplifies it to a `std::vector<>`. Now that I've had a chance to measure performance, this data structure isn't part of a bottleneck, so the additional complexity is unnecessary. This is part of PR5680. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214979 91177308-0d34-0410-b5e6-96231b3b80d8
61 lines
1.6 KiB
C++
61 lines
1.6 KiB
C++
//===- llvm/IR/UseListOrder.h - LLVM Use List Order -------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file has structures and command-line options for preserving use-list
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// order.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_IR_USELISTORDER_H
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#define LLVM_IR_USELISTORDER_H
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/SmallVector.h"
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#include <vector>
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namespace llvm {
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class Module;
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class Function;
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class Value;
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/// \brief Structure to hold a use-list order.
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struct UseListOrder {
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const Value *V;
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const Function *F;
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std::vector<unsigned> Shuffle;
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UseListOrder(const Value *V, const Function *F, size_t ShuffleSize)
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: V(V), F(F), Shuffle(ShuffleSize) {}
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UseListOrder() : V(0), F(0) {}
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UseListOrder(UseListOrder &&X)
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: V(X.V), F(X.F), Shuffle(std::move(X.Shuffle)) {}
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UseListOrder &operator=(UseListOrder &&X) {
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V = X.V;
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F = X.F;
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Shuffle = std::move(X.Shuffle);
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return *this;
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}
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private:
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UseListOrder(const UseListOrder &X) LLVM_DELETED_FUNCTION;
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UseListOrder &operator=(const UseListOrder &X) LLVM_DELETED_FUNCTION;
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};
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typedef std::vector<UseListOrder> UseListOrderStack;
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/// \brief Whether to preserve use-list ordering.
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bool shouldPreserveBitcodeUseListOrder();
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bool shouldPreserveAssemblyUseListOrder();
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} // end namespace llvm
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#endif
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