LLVM  4.0.0
AArch64PBQPRegAlloc.h
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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"
15 
16 namespace llvm {
17 
18 /// Add the accumulator chaining constraint to a PBQP graph
20 public:
21  // Add A57 specific constraints to the PBQP graph.
22  void apply(PBQPRAGraph &G) override;
23 
24 private:
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
Abstract base for classes implementing PBQP register allocation constraints (e.g. ...
void apply(PBQPRAGraph &G) override
TargetRegisterInfo base class - We assume that the target defines a static array of TargetRegisterDes...
const DataFlowGraph & G
Definition: RDFGraph.cpp:206
Add the accumulator chaining constraint to a PBQP graph.