1 //===-- AArch64PBQPRegAlloc.h - AArch64 specific PBQP constraints -------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #ifndef LLVM_LIB_TARGET_AARCH64_AARCH64PBQPREGALOC_H 11 #define LLVM_LIB_TARGET_AARCH64_AARCH64PBQPREGALOC_H 12 13 #include "llvm/ADT/SetVector.h" 14 #include "llvm/CodeGen/PBQPRAConstraint.h" 15 16 namespace llvm { 17 18 /// Add the accumulator chaining constraint to a PBQP graph 19 class A57ChainingConstraint : public PBQPRAConstraint { 20 public: 21 // Add A57 specific constraints to the PBQP graph. 22 void apply(PBQPRAGraph &G) override; 23 24 private: 25 SmallSetVector<unsigned, 32> Chains; 26 const TargetRegisterInfo *TRI; 27 28 // Add the accumulator chaining constraint, inside the chain, i.e. so that 29 // parity(Rd) == parity(Ra). 30 // \return true if a constraint was added 31 bool addIntraChainConstraint(PBQPRAGraph &G, unsigned Rd, unsigned Ra); 32 33 // Add constraints between existing chains 34 void addInterChainConstraint(PBQPRAGraph &G, unsigned Rd, unsigned Ra); 35 }; 36 } 37 38 #endif // LLVM_LIB_TARGET_AARCH64_AARCH64PBQPREGALOC_H 39
