1 //==- AArch64PBQPRegAlloc.h - AArch64 specific PBQP constraints --*- C++ -*-==// 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 class TargetRegisterInfo; 19 20 /// Add the accumulator chaining constraint to a PBQP graph 21 class A57ChainingConstraint : public PBQPRAConstraint { 22 public: 23 // Add A57 specific constraints to the PBQP graph. 24 void apply(PBQPRAGraph &G) override; 25 26 private: 27 SmallSetVector<unsigned, 32> Chains; 28 const TargetRegisterInfo *TRI; 29 30 // Add the accumulator chaining constraint, inside the chain, i.e. so that 31 // parity(Rd) == parity(Ra). 32 // \return true if a constraint was added 33 bool addIntraChainConstraint(PBQPRAGraph &G, unsigned Rd, unsigned Ra); 34 35 // Add constraints between existing chains 36 void addInterChainConstraint(PBQPRAGraph &G, unsigned Rd, unsigned Ra); 37 }; 38 39 } // end namespace llvm 40 41 #endif // LLVM_LIB_TARGET_AARCH64_AARCH64PBQPREGALOC_H 42
