1 //==- AArch64PBQPRegAlloc.h - AArch64 specific PBQP constraints --*- 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 #ifndef LLVM_LIB_TARGET_AARCH64_AARCH64PBQPREGALOC_H 10 #define LLVM_LIB_TARGET_AARCH64_AARCH64PBQPREGALOC_H 11 12 #include "llvm/ADT/SetVector.h" 13 #include "llvm/CodeGen/PBQPRAConstraint.h" 14 15 namespace llvm { 16 17 class TargetRegisterInfo; 18 19 /// Add the accumulator chaining constraint to a PBQP graph 20 class A57ChainingConstraint : public PBQPRAConstraint { 21 public: 22 // Add A57 specific constraints to the PBQP graph. 23 void apply(PBQPRAGraph &G) override; 24 25 private: 26 SmallSetVector<unsigned, 32> Chains; 27 const TargetRegisterInfo *TRI; 28 29 // Add the accumulator chaining constraint, inside the chain, i.e. so that 30 // parity(Rd) == parity(Ra). 31 // \return true if a constraint was added 32 bool addIntraChainConstraint(PBQPRAGraph &G, unsigned Rd, unsigned Ra); 33 34 // Add constraints between existing chains 35 void addInterChainConstraint(PBQPRAGraph &G, unsigned Rd, unsigned Ra); 36 }; 37 38 } // end namespace llvm 39 40 #endif // LLVM_LIB_TARGET_AARCH64_AARCH64PBQPREGALOC_H 41