AArch64PBQPRegAlloc.h revision 277718 
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
16namespace llvm {
17
18/// Add the accumulator chaining constraint to a PBQP graph
19class A57ChainingConstraint : public PBQPRAConstraint {
20public:
21  // Add A57 specific constraints to the PBQP graph.
22  void apply(PBQPRAGraph &G) override;
23
24private:
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