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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
41 lines
1.3 KiB
C++
41 lines
1.3 KiB
C++
//==- AArch64PBQPRegAlloc.h - AArch64 specific PBQP constraints --*- C++ -*-==//
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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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#ifndef LLVM_LIB_TARGET_AARCH64_AARCH64PBQPREGALOC_H
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#define LLVM_LIB_TARGET_AARCH64_AARCH64PBQPREGALOC_H
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#include "llvm/ADT/SetVector.h"
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#include "llvm/CodeGen/PBQPRAConstraint.h"
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namespace llvm {
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class TargetRegisterInfo;
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/// Add the accumulator chaining constraint to a PBQP graph
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class A57ChainingConstraint : public PBQPRAConstraint {
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public:
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// Add A57 specific constraints to the PBQP graph.
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void apply(PBQPRAGraph &G) override;
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private:
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SmallSetVector<unsigned, 32> Chains;
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const TargetRegisterInfo *TRI;
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// Add the accumulator chaining constraint, inside the chain, i.e. so that
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// parity(Rd) == parity(Ra).
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// \return true if a constraint was added
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bool addIntraChainConstraint(PBQPRAGraph &G, unsigned Rd, unsigned Ra);
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// Add constraints between existing chains
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void addInterChainConstraint(PBQPRAGraph &G, unsigned Rd, unsigned Ra);
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};
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} // end namespace llvm
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#endif // LLVM_LIB_TARGET_AARCH64_AARCH64PBQPREGALOC_H
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