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54d63b4fd5
This patch removes the PBQPBuilder class and its subclasses and replaces them with a composable constraints class: PBQPRAConstraint. This allows constraints that are only required for optimisation (e.g. coalescing, soft pairing) to be mixed and matched. This patch also introduces support for target writers to supply custom constraints for their targets by overriding a TargetSubtargetInfo method: std::unique_ptr<PBQPRAConstraints> getCustomPBQPConstraints() const; This patch should have no effect on allocations. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219421 91177308-0d34-0410-b5e6-96231b3b80d8
31 lines
1002 B
C++
31 lines
1002 B
C++
//===-- RegAllocPBQP.h ------------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the PBQPBuilder interface, for classes which build PBQP
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// instances to represent register allocation problems, and the RegAllocPBQP
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// interface.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CODEGEN_REGALLOCPBQP_H
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#define LLVM_CODEGEN_REGALLOCPBQP_H
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#include "llvm/CodeGen/MachineFunctionPass.h"
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#include "llvm/CodeGen/PBQPRAConstraint.h"
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#include "llvm/CodeGen/PBQP/RegAllocSolver.h"
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namespace llvm {
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/// @brief Create a PBQP register allocator instance.
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FunctionPass *
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createPBQPRegisterAllocator(char *customPassID = nullptr);
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}
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#endif /* LLVM_CODEGEN_REGALLOCPBQP_H */
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