Delete trailing whitespace; NFC
[oota-llvm.git] / lib / Target / AArch64 / AArch64PBQPRegAlloc.h
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