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7aba80f80f
This change incorporates an effort by Connor Abbot to change how we deal with WWM operations potentially trashing valid values in inactive lanes. Previously, the SIFixWWMLiveness pass would work out which registers were being trashed within WWM regions, and ensure that the register allocator did not have any values it was depending on resident in those registers if the WWM section would trash them. This worked perfectly well, but would cause sometimes severe register pressure when the WWM section resided before divergent control flow (or at least that is where I mostly observed it). This fix instead runs through the WWM sections and pre allocates some registers for WWM. It then reserves these registers so that the register allocator cannot use them. This results in a significant register saving on some WWM shaders I'm working with (130 -> 104 VGPRs, with just this change!). Differential Revision: https://reviews.llvm.org/D59295 llvm-svn: 357400
296 lines
9.7 KiB
C++
296 lines
9.7 KiB
C++
//===-- AMDGPU.h - MachineFunction passes hw codegen --------------*- C++ -*-=//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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/// \file
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_AMDGPU_AMDGPU_H
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#define LLVM_LIB_TARGET_AMDGPU_AMDGPU_H
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#include "llvm/Target/TargetMachine.h"
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namespace llvm {
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class AMDGPUTargetMachine;
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class FunctionPass;
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class GCNTargetMachine;
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class ModulePass;
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class Pass;
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class Target;
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class TargetMachine;
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class TargetOptions;
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class PassRegistry;
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class Module;
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// R600 Passes
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FunctionPass *createR600VectorRegMerger();
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FunctionPass *createR600ExpandSpecialInstrsPass();
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FunctionPass *createR600EmitClauseMarkers();
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FunctionPass *createR600ClauseMergePass();
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FunctionPass *createR600Packetizer();
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FunctionPass *createR600ControlFlowFinalizer();
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FunctionPass *createAMDGPUCFGStructurizerPass();
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FunctionPass *createR600ISelDag(TargetMachine *TM, CodeGenOpt::Level OptLevel);
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// SI Passes
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FunctionPass *createGCNDPPCombinePass();
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FunctionPass *createSIAnnotateControlFlowPass();
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FunctionPass *createSIFoldOperandsPass();
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FunctionPass *createSIPeepholeSDWAPass();
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FunctionPass *createSILowerI1CopiesPass();
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FunctionPass *createSIFixupVectorISelPass();
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FunctionPass *createSIAddIMGInitPass();
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FunctionPass *createSIShrinkInstructionsPass();
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FunctionPass *createSILoadStoreOptimizerPass();
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FunctionPass *createSIWholeQuadModePass();
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FunctionPass *createSIFixControlFlowLiveIntervalsPass();
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FunctionPass *createSIOptimizeExecMaskingPreRAPass();
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FunctionPass *createSIFixSGPRCopiesPass();
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FunctionPass *createSIMemoryLegalizerPass();
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FunctionPass *createSIInsertWaitcntsPass();
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FunctionPass *createSIPreAllocateWWMRegsPass();
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FunctionPass *createSIFormMemoryClausesPass();
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FunctionPass *createAMDGPUSimplifyLibCallsPass(const TargetOptions &);
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FunctionPass *createAMDGPUUseNativeCallsPass();
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FunctionPass *createAMDGPUCodeGenPreparePass();
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FunctionPass *createAMDGPUMachineCFGStructurizerPass();
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FunctionPass *createAMDGPURewriteOutArgumentsPass();
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FunctionPass *createSIModeRegisterPass();
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void initializeAMDGPUDAGToDAGISelPass(PassRegistry&);
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void initializeAMDGPUMachineCFGStructurizerPass(PassRegistry&);
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extern char &AMDGPUMachineCFGStructurizerID;
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void initializeAMDGPUAlwaysInlinePass(PassRegistry&);
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Pass *createAMDGPUAnnotateKernelFeaturesPass();
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void initializeAMDGPUAnnotateKernelFeaturesPass(PassRegistry &);
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extern char &AMDGPUAnnotateKernelFeaturesID;
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FunctionPass *createAMDGPUAtomicOptimizerPass();
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void initializeAMDGPUAtomicOptimizerPass(PassRegistry &);
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extern char &AMDGPUAtomicOptimizerID;
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ModulePass *createAMDGPULowerIntrinsicsPass();
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void initializeAMDGPULowerIntrinsicsPass(PassRegistry &);
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extern char &AMDGPULowerIntrinsicsID;
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ModulePass *createAMDGPUFixFunctionBitcastsPass();
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void initializeAMDGPUFixFunctionBitcastsPass(PassRegistry &);
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extern char &AMDGPUFixFunctionBitcastsID;
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FunctionPass *createAMDGPULowerKernelArgumentsPass();
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void initializeAMDGPULowerKernelArgumentsPass(PassRegistry &);
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extern char &AMDGPULowerKernelArgumentsID;
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ModulePass *createAMDGPULowerKernelAttributesPass();
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void initializeAMDGPULowerKernelAttributesPass(PassRegistry &);
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extern char &AMDGPULowerKernelAttributesID;
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void initializeAMDGPURewriteOutArgumentsPass(PassRegistry &);
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extern char &AMDGPURewriteOutArgumentsID;
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void initializeGCNDPPCombinePass(PassRegistry &);
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extern char &GCNDPPCombineID;
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void initializeR600ClauseMergePassPass(PassRegistry &);
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extern char &R600ClauseMergePassID;
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void initializeR600ControlFlowFinalizerPass(PassRegistry &);
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extern char &R600ControlFlowFinalizerID;
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void initializeR600ExpandSpecialInstrsPassPass(PassRegistry &);
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extern char &R600ExpandSpecialInstrsPassID;
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void initializeR600VectorRegMergerPass(PassRegistry &);
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extern char &R600VectorRegMergerID;
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void initializeR600PacketizerPass(PassRegistry &);
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extern char &R600PacketizerID;
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void initializeSIFoldOperandsPass(PassRegistry &);
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extern char &SIFoldOperandsID;
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void initializeSIPeepholeSDWAPass(PassRegistry &);
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extern char &SIPeepholeSDWAID;
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void initializeSIShrinkInstructionsPass(PassRegistry&);
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extern char &SIShrinkInstructionsID;
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void initializeSIFixSGPRCopiesPass(PassRegistry &);
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extern char &SIFixSGPRCopiesID;
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void initializeSIFixVGPRCopiesPass(PassRegistry &);
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extern char &SIFixVGPRCopiesID;
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void initializeSIFixupVectorISelPass(PassRegistry &);
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extern char &SIFixupVectorISelID;
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void initializeSILowerI1CopiesPass(PassRegistry &);
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extern char &SILowerI1CopiesID;
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void initializeSILoadStoreOptimizerPass(PassRegistry &);
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extern char &SILoadStoreOptimizerID;
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void initializeSIWholeQuadModePass(PassRegistry &);
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extern char &SIWholeQuadModeID;
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void initializeSILowerControlFlowPass(PassRegistry &);
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extern char &SILowerControlFlowID;
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void initializeSIInsertSkipsPass(PassRegistry &);
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extern char &SIInsertSkipsPassID;
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void initializeSIOptimizeExecMaskingPass(PassRegistry &);
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extern char &SIOptimizeExecMaskingID;
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void initializeSIPreAllocateWWMRegsPass(PassRegistry &);
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extern char &SIPreAllocateWWMRegsID;
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void initializeAMDGPUSimplifyLibCallsPass(PassRegistry &);
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extern char &AMDGPUSimplifyLibCallsID;
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void initializeAMDGPUUseNativeCallsPass(PassRegistry &);
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extern char &AMDGPUUseNativeCallsID;
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void initializeSIAddIMGInitPass(PassRegistry &);
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extern char &SIAddIMGInitID;
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void initializeAMDGPUPerfHintAnalysisPass(PassRegistry &);
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extern char &AMDGPUPerfHintAnalysisID;
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// Passes common to R600 and SI
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FunctionPass *createAMDGPUPromoteAlloca();
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void initializeAMDGPUPromoteAllocaPass(PassRegistry&);
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extern char &AMDGPUPromoteAllocaID;
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Pass *createAMDGPUStructurizeCFGPass();
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FunctionPass *createAMDGPUISelDag(
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TargetMachine *TM = nullptr,
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CodeGenOpt::Level OptLevel = CodeGenOpt::Default);
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ModulePass *createAMDGPUAlwaysInlinePass(bool GlobalOpt = true);
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ModulePass *createR600OpenCLImageTypeLoweringPass();
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FunctionPass *createAMDGPUAnnotateUniformValues();
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ModulePass* createAMDGPUUnifyMetadataPass();
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void initializeAMDGPUUnifyMetadataPass(PassRegistry&);
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extern char &AMDGPUUnifyMetadataID;
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void initializeSIOptimizeExecMaskingPreRAPass(PassRegistry&);
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extern char &SIOptimizeExecMaskingPreRAID;
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void initializeAMDGPUAnnotateUniformValuesPass(PassRegistry&);
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extern char &AMDGPUAnnotateUniformValuesPassID;
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void initializeAMDGPUCodeGenPreparePass(PassRegistry&);
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extern char &AMDGPUCodeGenPrepareID;
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void initializeSIAnnotateControlFlowPass(PassRegistry&);
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extern char &SIAnnotateControlFlowPassID;
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void initializeSIMemoryLegalizerPass(PassRegistry&);
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extern char &SIMemoryLegalizerID;
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void initializeSIModeRegisterPass(PassRegistry&);
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extern char &SIModeRegisterID;
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void initializeSIInsertWaitcntsPass(PassRegistry&);
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extern char &SIInsertWaitcntsID;
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void initializeSIFormMemoryClausesPass(PassRegistry&);
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extern char &SIFormMemoryClausesID;
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void initializeAMDGPUUnifyDivergentExitNodesPass(PassRegistry&);
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extern char &AMDGPUUnifyDivergentExitNodesID;
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ImmutablePass *createAMDGPUAAWrapperPass();
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void initializeAMDGPUAAWrapperPassPass(PassRegistry&);
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ImmutablePass *createAMDGPUExternalAAWrapperPass();
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void initializeAMDGPUExternalAAWrapperPass(PassRegistry&);
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void initializeAMDGPUArgumentUsageInfoPass(PassRegistry &);
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Pass *createAMDGPUFunctionInliningPass();
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void initializeAMDGPUInlinerPass(PassRegistry&);
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ModulePass *createAMDGPUOpenCLEnqueuedBlockLoweringPass();
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void initializeAMDGPUOpenCLEnqueuedBlockLoweringPass(PassRegistry &);
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extern char &AMDGPUOpenCLEnqueuedBlockLoweringID;
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Target &getTheAMDGPUTarget();
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Target &getTheGCNTarget();
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namespace AMDGPU {
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enum TargetIndex {
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TI_CONSTDATA_START,
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TI_SCRATCH_RSRC_DWORD0,
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TI_SCRATCH_RSRC_DWORD1,
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TI_SCRATCH_RSRC_DWORD2,
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TI_SCRATCH_RSRC_DWORD3
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};
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}
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} // End namespace llvm
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/// OpenCL uses address spaces to differentiate between
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/// various memory regions on the hardware. On the CPU
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/// all of the address spaces point to the same memory,
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/// however on the GPU, each address space points to
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/// a separate piece of memory that is unique from other
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/// memory locations.
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namespace AMDGPUAS {
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enum : unsigned {
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// The maximum value for flat, generic, local, private, constant and region.
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MAX_AMDGPU_ADDRESS = 7,
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FLAT_ADDRESS = 0, ///< Address space for flat memory.
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GLOBAL_ADDRESS = 1, ///< Address space for global memory (RAT0, VTX0).
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REGION_ADDRESS = 2, ///< Address space for region memory. (GDS)
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CONSTANT_ADDRESS = 4, ///< Address space for constant memory (VTX2).
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LOCAL_ADDRESS = 3, ///< Address space for local memory.
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PRIVATE_ADDRESS = 5, ///< Address space for private memory.
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CONSTANT_ADDRESS_32BIT = 6, ///< Address space for 32-bit constant memory.
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BUFFER_FAT_POINTER = 7, ///< Address space for 160-bit buffer fat pointers.
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/// Address space for direct addressible parameter memory (CONST0).
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PARAM_D_ADDRESS = 6,
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/// Address space for indirect addressible parameter memory (VTX1).
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PARAM_I_ADDRESS = 7,
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// Do not re-order the CONSTANT_BUFFER_* enums. Several places depend on
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// this order to be able to dynamically index a constant buffer, for
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// example:
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//
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// ConstantBufferAS = CONSTANT_BUFFER_0 + CBIdx
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CONSTANT_BUFFER_0 = 8,
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CONSTANT_BUFFER_1 = 9,
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CONSTANT_BUFFER_2 = 10,
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CONSTANT_BUFFER_3 = 11,
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CONSTANT_BUFFER_4 = 12,
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CONSTANT_BUFFER_5 = 13,
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CONSTANT_BUFFER_6 = 14,
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CONSTANT_BUFFER_7 = 15,
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CONSTANT_BUFFER_8 = 16,
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CONSTANT_BUFFER_9 = 17,
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CONSTANT_BUFFER_10 = 18,
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CONSTANT_BUFFER_11 = 19,
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CONSTANT_BUFFER_12 = 20,
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CONSTANT_BUFFER_13 = 21,
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CONSTANT_BUFFER_14 = 22,
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CONSTANT_BUFFER_15 = 23,
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// Some places use this if the address space can't be determined.
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UNKNOWN_ADDRESS_SPACE = ~0u,
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};
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}
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#endif
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