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authorvitalyisaev <vitalyisaev@yandex-team.com>2023-06-29 10:00:50 +0300
committervitalyisaev <vitalyisaev@yandex-team.com>2023-06-29 10:00:50 +0300
commit6ffe9e53658409f212834330e13564e4952558f6 (patch)
tree85b1e00183517648b228aafa7c8fb07f5276f419 /contrib/libs/clang14/lib/CodeGen/CGOpenMPRuntimeGPU.h
parent726057070f9c5a91fc10fde0d5024913d10f1ab9 (diff)
downloadydb-6ffe9e53658409f212834330e13564e4952558f6.tar.gz
YQ Connector: support managed ClickHouse
Со стороны dqrun можно обратиться к инстансу коннектора, который работает на streaming стенде, и извлечь данные из облачного CH.
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+//===------ CGOpenMPRuntimeGPU.h - Interface to OpenMP GPU Runtimes ------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This provides a generalized class for OpenMP runtime code generation
+// specialized by GPU targets NVPTX and AMDGCN.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_LIB_CODEGEN_CGOPENMPRUNTIMEGPU_H
+#define LLVM_CLANG_LIB_CODEGEN_CGOPENMPRUNTIMEGPU_H
+
+#include "CGOpenMPRuntime.h"
+#include "CodeGenFunction.h"
+#include "clang/AST/StmtOpenMP.h"
+
+namespace clang {
+namespace CodeGen {
+
+class CGOpenMPRuntimeGPU : public CGOpenMPRuntime {
+public:
+ /// Defines the execution mode.
+ enum ExecutionMode {
+ /// SPMD execution mode (all threads are worker threads).
+ EM_SPMD,
+ /// Non-SPMD execution mode (1 master thread, others are workers).
+ EM_NonSPMD,
+ /// Unknown execution mode (orphaned directive).
+ EM_Unknown,
+ };
+private:
+ /// Parallel outlined function work for workers to execute.
+ llvm::SmallVector<llvm::Function *, 16> Work;
+
+ struct EntryFunctionState {
+ SourceLocation Loc;
+ };
+
+ ExecutionMode getExecutionMode() const;
+
+ bool requiresFullRuntime() const { return RequiresFullRuntime; }
+
+ /// Get barrier to synchronize all threads in a block.
+ void syncCTAThreads(CodeGenFunction &CGF);
+
+ /// Helper for target directive initialization.
+ void emitKernelInit(CodeGenFunction &CGF, EntryFunctionState &EST,
+ bool IsSPMD);
+
+ /// Helper for target directive finalization.
+ void emitKernelDeinit(CodeGenFunction &CGF, EntryFunctionState &EST,
+ bool IsSPMD);
+
+ /// Helper for generic variables globalization prolog.
+ void emitGenericVarsProlog(CodeGenFunction &CGF, SourceLocation Loc,
+ bool WithSPMDCheck = false);
+
+ /// Helper for generic variables globalization epilog.
+ void emitGenericVarsEpilog(CodeGenFunction &CGF, bool WithSPMDCheck = false);
+
+ //
+ // Base class overrides.
+ //
+
+ /// Creates offloading entry for the provided entry ID \a ID,
+ /// address \a Addr, size \a Size, and flags \a Flags.
+ void createOffloadEntry(llvm::Constant *ID, llvm::Constant *Addr,
+ uint64_t Size, int32_t Flags,
+ llvm::GlobalValue::LinkageTypes Linkage) override;
+
+ /// Emit outlined function specialized for the Fork-Join
+ /// programming model for applicable target directives on the NVPTX device.
+ /// \param D Directive to emit.
+ /// \param ParentName Name of the function that encloses the target region.
+ /// \param OutlinedFn Outlined function value to be defined by this call.
+ /// \param OutlinedFnID Outlined function ID value to be defined by this call.
+ /// \param IsOffloadEntry True if the outlined function is an offload entry.
+ /// An outlined function may not be an entry if, e.g. the if clause always
+ /// evaluates to false.
+ void emitNonSPMDKernel(const OMPExecutableDirective &D, StringRef ParentName,
+ llvm::Function *&OutlinedFn,
+ llvm::Constant *&OutlinedFnID, bool IsOffloadEntry,
+ const RegionCodeGenTy &CodeGen);
+
+ /// Emit outlined function specialized for the Single Program
+ /// Multiple Data programming model for applicable target directives on the
+ /// NVPTX device.
+ /// \param D Directive to emit.
+ /// \param ParentName Name of the function that encloses the target region.
+ /// \param OutlinedFn Outlined function value to be defined by this call.
+ /// \param OutlinedFnID Outlined function ID value to be defined by this call.
+ /// \param IsOffloadEntry True if the outlined function is an offload entry.
+ /// \param CodeGen Object containing the target statements.
+ /// An outlined function may not be an entry if, e.g. the if clause always
+ /// evaluates to false.
+ void emitSPMDKernel(const OMPExecutableDirective &D, StringRef ParentName,
+ llvm::Function *&OutlinedFn,
+ llvm::Constant *&OutlinedFnID, bool IsOffloadEntry,
+ const RegionCodeGenTy &CodeGen);
+
+ /// Emit outlined function for 'target' directive on the NVPTX
+ /// device.
+ /// \param D Directive to emit.
+ /// \param ParentName Name of the function that encloses the target region.
+ /// \param OutlinedFn Outlined function value to be defined by this call.
+ /// \param OutlinedFnID Outlined function ID value to be defined by this call.
+ /// \param IsOffloadEntry True if the outlined function is an offload entry.
+ /// An outlined function may not be an entry if, e.g. the if clause always
+ /// evaluates to false.
+ void emitTargetOutlinedFunction(const OMPExecutableDirective &D,
+ StringRef ParentName,
+ llvm::Function *&OutlinedFn,
+ llvm::Constant *&OutlinedFnID,
+ bool IsOffloadEntry,
+ const RegionCodeGenTy &CodeGen) override;
+
+ /// Emits code for parallel or serial call of the \a OutlinedFn with
+ /// variables captured in a record which address is stored in \a
+ /// CapturedStruct.
+ /// This call is for the Non-SPMD Execution Mode.
+ /// \param OutlinedFn Outlined function to be run in parallel threads. Type of
+ /// this function is void(*)(kmp_int32 *, kmp_int32, struct context_vars*).
+ /// \param CapturedVars A pointer to the record with the references to
+ /// variables used in \a OutlinedFn function.
+ /// \param IfCond Condition in the associated 'if' clause, if it was
+ /// specified, nullptr otherwise.
+ void emitNonSPMDParallelCall(CodeGenFunction &CGF, SourceLocation Loc,
+ llvm::Value *OutlinedFn,
+ ArrayRef<llvm::Value *> CapturedVars,
+ const Expr *IfCond);
+
+ /// Emits code for parallel or serial call of the \a OutlinedFn with
+ /// variables captured in a record which address is stored in \a
+ /// CapturedStruct.
+ /// This call is for a parallel directive within an SPMD target directive.
+ /// \param OutlinedFn Outlined function to be run in parallel threads. Type of
+ /// this function is void(*)(kmp_int32 *, kmp_int32, struct context_vars*).
+ /// \param CapturedVars A pointer to the record with the references to
+ /// variables used in \a OutlinedFn function.
+ /// \param IfCond Condition in the associated 'if' clause, if it was
+ /// specified, nullptr otherwise.
+ ///
+ void emitSPMDParallelCall(CodeGenFunction &CGF, SourceLocation Loc,
+ llvm::Function *OutlinedFn,
+ ArrayRef<llvm::Value *> CapturedVars,
+ const Expr *IfCond);
+
+protected:
+ /// Get the function name of an outlined region.
+ // The name can be customized depending on the target.
+ //
+ StringRef getOutlinedHelperName() const override {
+ return "__omp_outlined__";
+ }
+
+ /// Check if the default location must be constant.
+ /// Constant for NVPTX for better optimization.
+ bool isDefaultLocationConstant() const override { return true; }
+
+ /// Returns additional flags that can be stored in reserved_2 field of the
+ /// default location.
+ /// For NVPTX target contains data about SPMD/Non-SPMD execution mode +
+ /// Full/Lightweight runtime mode. Used for better optimization.
+ unsigned getDefaultLocationReserved2Flags() const override;
+
+public:
+ explicit CGOpenMPRuntimeGPU(CodeGenModule &CGM);
+ void clear() override;
+
+ /// Declare generalized virtual functions which need to be defined
+ /// by all specializations of OpenMPGPURuntime Targets like AMDGCN
+ /// and NVPTX.
+
+ /// Get the GPU warp size.
+ llvm::Value *getGPUWarpSize(CodeGenFunction &CGF);
+
+ /// Get the id of the current thread on the GPU.
+ llvm::Value *getGPUThreadID(CodeGenFunction &CGF);
+
+ /// Get the maximum number of threads in a block of the GPU.
+ llvm::Value *getGPUNumThreads(CodeGenFunction &CGF);
+
+ /// Emit call to void __kmpc_push_proc_bind(ident_t *loc, kmp_int32
+ /// global_tid, int proc_bind) to generate code for 'proc_bind' clause.
+ virtual void emitProcBindClause(CodeGenFunction &CGF,
+ llvm::omp::ProcBindKind ProcBind,
+ SourceLocation Loc) override;
+
+ /// Emits call to void __kmpc_push_num_threads(ident_t *loc, kmp_int32
+ /// global_tid, kmp_int32 num_threads) to generate code for 'num_threads'
+ /// clause.
+ /// \param NumThreads An integer value of threads.
+ virtual void emitNumThreadsClause(CodeGenFunction &CGF,
+ llvm::Value *NumThreads,
+ SourceLocation Loc) override;
+
+ /// This function ought to emit, in the general case, a call to
+ // the openmp runtime kmpc_push_num_teams. In NVPTX backend it is not needed
+ // as these numbers are obtained through the PTX grid and block configuration.
+ /// \param NumTeams An integer expression of teams.
+ /// \param ThreadLimit An integer expression of threads.
+ void emitNumTeamsClause(CodeGenFunction &CGF, const Expr *NumTeams,
+ const Expr *ThreadLimit, SourceLocation Loc) override;
+
+ /// Emits inlined function for the specified OpenMP parallel
+ // directive.
+ /// \a D. This outlined function has type void(*)(kmp_int32 *ThreadID,
+ /// kmp_int32 BoundID, struct context_vars*).
+ /// \param D OpenMP directive.
+ /// \param ThreadIDVar Variable for thread id in the current OpenMP region.
+ /// \param InnermostKind Kind of innermost directive (for simple directives it
+ /// is a directive itself, for combined - its innermost directive).
+ /// \param CodeGen Code generation sequence for the \a D directive.
+ llvm::Function *
+ emitParallelOutlinedFunction(const OMPExecutableDirective &D,
+ const VarDecl *ThreadIDVar,
+ OpenMPDirectiveKind InnermostKind,
+ const RegionCodeGenTy &CodeGen) override;
+
+ /// Emits inlined function for the specified OpenMP teams
+ // directive.
+ /// \a D. This outlined function has type void(*)(kmp_int32 *ThreadID,
+ /// kmp_int32 BoundID, struct context_vars*).
+ /// \param D OpenMP directive.
+ /// \param ThreadIDVar Variable for thread id in the current OpenMP region.
+ /// \param InnermostKind Kind of innermost directive (for simple directives it
+ /// is a directive itself, for combined - its innermost directive).
+ /// \param CodeGen Code generation sequence for the \a D directive.
+ llvm::Function *
+ emitTeamsOutlinedFunction(const OMPExecutableDirective &D,
+ const VarDecl *ThreadIDVar,
+ OpenMPDirectiveKind InnermostKind,
+ const RegionCodeGenTy &CodeGen) override;
+
+ /// Emits code for teams call of the \a OutlinedFn with
+ /// variables captured in a record which address is stored in \a
+ /// CapturedStruct.
+ /// \param OutlinedFn Outlined function to be run by team masters. Type of
+ /// this function is void(*)(kmp_int32 *, kmp_int32, struct context_vars*).
+ /// \param CapturedVars A pointer to the record with the references to
+ /// variables used in \a OutlinedFn function.
+ ///
+ void emitTeamsCall(CodeGenFunction &CGF, const OMPExecutableDirective &D,
+ SourceLocation Loc, llvm::Function *OutlinedFn,
+ ArrayRef<llvm::Value *> CapturedVars) override;
+
+ /// Emits code for parallel or serial call of the \a OutlinedFn with
+ /// variables captured in a record which address is stored in \a
+ /// CapturedStruct.
+ /// \param OutlinedFn Outlined function to be run in parallel threads. Type of
+ /// this function is void(*)(kmp_int32 *, kmp_int32, struct context_vars*).
+ /// \param CapturedVars A pointer to the record with the references to
+ /// variables used in \a OutlinedFn function.
+ /// \param IfCond Condition in the associated 'if' clause, if it was
+ /// specified, nullptr otherwise.
+ /// \param NumThreads The value corresponding to the num_threads clause, if
+ /// any,
+ /// or nullptr.
+ void emitParallelCall(CodeGenFunction &CGF, SourceLocation Loc,
+ llvm::Function *OutlinedFn,
+ ArrayRef<llvm::Value *> CapturedVars,
+ const Expr *IfCond, llvm::Value *NumThreads) override;
+
+ /// Emit an implicit/explicit barrier for OpenMP threads.
+ /// \param Kind Directive for which this implicit barrier call must be
+ /// generated. Must be OMPD_barrier for explicit barrier generation.
+ /// \param EmitChecks true if need to emit checks for cancellation barriers.
+ /// \param ForceSimpleCall true simple barrier call must be emitted, false if
+ /// runtime class decides which one to emit (simple or with cancellation
+ /// checks).
+ ///
+ void emitBarrierCall(CodeGenFunction &CGF, SourceLocation Loc,
+ OpenMPDirectiveKind Kind, bool EmitChecks = true,
+ bool ForceSimpleCall = false) override;
+
+ /// Emits a critical region.
+ /// \param CriticalName Name of the critical region.
+ /// \param CriticalOpGen Generator for the statement associated with the given
+ /// critical region.
+ /// \param Hint Value of the 'hint' clause (optional).
+ void emitCriticalRegion(CodeGenFunction &CGF, StringRef CriticalName,
+ const RegionCodeGenTy &CriticalOpGen,
+ SourceLocation Loc,
+ const Expr *Hint = nullptr) override;
+
+ /// Emit a code for reduction clause.
+ ///
+ /// \param Privates List of private copies for original reduction arguments.
+ /// \param LHSExprs List of LHS in \a ReductionOps reduction operations.
+ /// \param RHSExprs List of RHS in \a ReductionOps reduction operations.
+ /// \param ReductionOps List of reduction operations in form 'LHS binop RHS'
+ /// or 'operator binop(LHS, RHS)'.
+ /// \param Options List of options for reduction codegen:
+ /// WithNowait true if parent directive has also nowait clause, false
+ /// otherwise.
+ /// SimpleReduction Emit reduction operation only. Used for omp simd
+ /// directive on the host.
+ /// ReductionKind The kind of reduction to perform.
+ virtual void emitReduction(CodeGenFunction &CGF, SourceLocation Loc,
+ ArrayRef<const Expr *> Privates,
+ ArrayRef<const Expr *> LHSExprs,
+ ArrayRef<const Expr *> RHSExprs,
+ ArrayRef<const Expr *> ReductionOps,
+ ReductionOptionsTy Options) override;
+
+ /// Returns specified OpenMP runtime function for the current OpenMP
+ /// implementation. Specialized for the NVPTX device.
+ /// \param Function OpenMP runtime function.
+ /// \return Specified function.
+ llvm::FunctionCallee createNVPTXRuntimeFunction(unsigned Function);
+
+ /// Translates the native parameter of outlined function if this is required
+ /// for target.
+ /// \param FD Field decl from captured record for the parameter.
+ /// \param NativeParam Parameter itself.
+ const VarDecl *translateParameter(const FieldDecl *FD,
+ const VarDecl *NativeParam) const override;
+
+ /// Gets the address of the native argument basing on the address of the
+ /// target-specific parameter.
+ /// \param NativeParam Parameter itself.
+ /// \param TargetParam Corresponding target-specific parameter.
+ Address getParameterAddress(CodeGenFunction &CGF, const VarDecl *NativeParam,
+ const VarDecl *TargetParam) const override;
+
+ /// Emits call of the outlined function with the provided arguments,
+ /// translating these arguments to correct target-specific arguments.
+ void emitOutlinedFunctionCall(
+ CodeGenFunction &CGF, SourceLocation Loc, llvm::FunctionCallee OutlinedFn,
+ ArrayRef<llvm::Value *> Args = llvm::None) const override;
+
+ /// Emits OpenMP-specific function prolog.
+ /// Required for device constructs.
+ void emitFunctionProlog(CodeGenFunction &CGF, const Decl *D) override;
+
+ /// Gets the OpenMP-specific address of the local variable.
+ Address getAddressOfLocalVariable(CodeGenFunction &CGF,
+ const VarDecl *VD) override;
+
+ /// Target codegen is specialized based on two data-sharing modes: CUDA, in
+ /// which the local variables are actually global threadlocal, and Generic, in
+ /// which the local variables are placed in global memory if they may escape
+ /// their declaration context.
+ enum DataSharingMode {
+ /// CUDA data sharing mode.
+ CUDA,
+ /// Generic data-sharing mode.
+ Generic,
+ };
+
+ /// Cleans up references to the objects in finished function.
+ ///
+ void functionFinished(CodeGenFunction &CGF) override;
+
+ /// Choose a default value for the dist_schedule clause.
+ void getDefaultDistScheduleAndChunk(CodeGenFunction &CGF,
+ const OMPLoopDirective &S, OpenMPDistScheduleClauseKind &ScheduleKind,
+ llvm::Value *&Chunk) const override;
+
+ /// Choose a default value for the schedule clause.
+ void getDefaultScheduleAndChunk(CodeGenFunction &CGF,
+ const OMPLoopDirective &S, OpenMPScheduleClauseKind &ScheduleKind,
+ const Expr *&ChunkExpr) const override;
+
+ /// Adjust some parameters for the target-based directives, like addresses of
+ /// the variables captured by reference in lambdas.
+ void adjustTargetSpecificDataForLambdas(
+ CodeGenFunction &CGF, const OMPExecutableDirective &D) const override;
+
+ /// Perform check on requires decl to ensure that target architecture
+ /// supports unified addressing
+ void processRequiresDirective(const OMPRequiresDecl *D) override;
+
+ /// Checks if the variable has associated OMPAllocateDeclAttr attribute with
+ /// the predefined allocator and translates it into the corresponding address
+ /// space.
+ bool hasAllocateAttributeForGlobalVar(const VarDecl *VD, LangAS &AS) override;
+
+private:
+ /// Track the execution mode when codegening directives within a target
+ /// region. The appropriate mode (SPMD/NON-SPMD) is set on entry to the
+ /// target region and used by containing directives such as 'parallel'
+ /// to emit optimized code.
+ ExecutionMode CurrentExecutionMode = EM_Unknown;
+
+ /// Check if the full runtime is required (default - yes).
+ bool RequiresFullRuntime = true;
+
+ /// true if we're emitting the code for the target region and next parallel
+ /// region is L0 for sure.
+ bool IsInTargetMasterThreadRegion = false;
+ /// true if currently emitting code for target/teams/distribute region, false
+ /// - otherwise.
+ bool IsInTTDRegion = false;
+ /// true if we're definitely in the parallel region.
+ bool IsInParallelRegion = false;
+
+ /// Map between an outlined function and its wrapper.
+ llvm::DenseMap<llvm::Function *, llvm::Function *> WrapperFunctionsMap;
+
+ /// Emit function which wraps the outline parallel region
+ /// and controls the parameters which are passed to this function.
+ /// The wrapper ensures that the outlined function is called
+ /// with the correct arguments when data is shared.
+ llvm::Function *createParallelDataSharingWrapper(
+ llvm::Function *OutlinedParallelFn, const OMPExecutableDirective &D);
+
+ /// The data for the single globalized variable.
+ struct MappedVarData {
+ /// Corresponding field in the global record.
+ llvm::Value *GlobalizedVal = nullptr;
+ /// Corresponding address.
+ Address PrivateAddr = Address::invalid();
+ };
+ /// The map of local variables to their addresses in the global memory.
+ using DeclToAddrMapTy = llvm::MapVector<const Decl *, MappedVarData>;
+ /// Set of the parameters passed by value escaping OpenMP context.
+ using EscapedParamsTy = llvm::SmallPtrSet<const Decl *, 4>;
+ struct FunctionData {
+ DeclToAddrMapTy LocalVarData;
+ llvm::Optional<DeclToAddrMapTy> SecondaryLocalVarData = llvm::None;
+ EscapedParamsTy EscapedParameters;
+ llvm::SmallVector<const ValueDecl*, 4> EscapedVariableLengthDecls;
+ llvm::SmallVector<std::pair<llvm::Value *, llvm::Value *>, 4>
+ EscapedVariableLengthDeclsAddrs;
+ llvm::Value *IsInSPMDModeFlag = nullptr;
+ std::unique_ptr<CodeGenFunction::OMPMapVars> MappedParams;
+ };
+ /// Maps the function to the list of the globalized variables with their
+ /// addresses.
+ llvm::SmallDenseMap<llvm::Function *, FunctionData> FunctionGlobalizedDecls;
+ llvm::GlobalVariable *KernelTeamsReductionPtr = nullptr;
+ /// List of the records with the list of fields for the reductions across the
+ /// teams. Used to build the intermediate buffer for the fast teams
+ /// reductions.
+ /// All the records are gathered into a union `union.type` is created.
+ llvm::SmallVector<const RecordDecl *, 4> TeamsReductions;
+ /// Shared pointer for the global memory in the global memory buffer used for
+ /// the given kernel.
+ llvm::GlobalVariable *KernelStaticGlobalized = nullptr;
+ /// Pair of the Non-SPMD team and all reductions variables in this team
+ /// region.
+ std::pair<const Decl *, llvm::SmallVector<const ValueDecl *, 4>>
+ TeamAndReductions;
+};
+
+} // CodeGen namespace.
+} // clang namespace.
+
+#endif // LLVM_CLANG_LIB_CODEGEN_CGOPENMPRUNTIMEGPU_H