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20de1ea345
This patch moves the class for scheduling adjacent instructions, MacroFusion, to the target. In AArch64, it also expands the fusion to all instructions pairs in a scheduling block, beyond just among the predecessors of the branch at the end. Differential revision: https://reviews.llvm.org/D28489 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@293737 91177308-0d34-0410-b5e6-96231b3b80d8
31 lines
1.1 KiB
C++
31 lines
1.1 KiB
C++
//===- X86MacroFusion.h - X86 Macro Fusion --------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// \file 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 contains the X86 definition of the DAG scheduling mutation to pair
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// instructions back to back.
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//
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//===----------------------------------------------------------------------===//
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#include "X86InstrInfo.h"
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#include "llvm/CodeGen/MachineScheduler.h"
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//===----------------------------------------------------------------------===//
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// X86MacroFusion - DAG post-processing to encourage fusion of macro ops.
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//===----------------------------------------------------------------------===//
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namespace llvm {
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/// Note that you have to add:
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/// DAG.addMutation(createX86MacroFusionDAGMutation());
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/// to X86PassConfig::createMachineScheduler() to have an effect.
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std::unique_ptr<ScheduleDAGMutation>
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createX86MacroFusionDAGMutation();
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} // end namespace llvm
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