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Add parsing, sema analysis and serialization/deserialization for 'declare reduction' construct. User-defined reductions are defined as #pragma omp declare reduction( reduction-identifier : typename-list : combiner ) [initializer ( initializer-expr )] These custom reductions may be used in 'reduction' clauses of OpenMP constructs. The combiner specifies how partial results can be combined into a single value. The combiner can use the special variable identifiers omp_in and omp_out that are of the type of the variables being reduced with this reduction-identifier. Each of them will denote one of the values to be combined before executing the combiner. It is assumed that the special omp_out identifier will refer to the storage that holds the resulting combined value after executing the combiner. As the initializer-expr value of a user-defined reduction is not known a priori the initializer-clause can be used to specify one. Then the contents of the initializer-clause will be used as the initializer for private copies of reduction list items where the omp_priv identifier will refer to the storage to be initialized. The special identifier omp_orig can also appear in the initializer-clause and it will refer to the storage of the original variable to be reduced. Differential Revision: http://reviews.llvm.org/D11182 llvm-svn: 262582
103 lines
4.0 KiB
C++
103 lines
4.0 KiB
C++
//===--- DeclOpenMP.cpp - Declaration OpenMP AST Node Implementation ------===//
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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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/// \file
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/// \brief This file implements OMPThreadPrivateDecl, OMPCapturedExprDecl
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/// classes.
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///
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//===----------------------------------------------------------------------===//
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/Decl.h"
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#include "clang/AST/DeclBase.h"
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#include "clang/AST/DeclOpenMP.h"
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#include "clang/AST/Expr.h"
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using namespace clang;
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//===----------------------------------------------------------------------===//
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// OMPThreadPrivateDecl Implementation.
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//===----------------------------------------------------------------------===//
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void OMPThreadPrivateDecl::anchor() { }
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OMPThreadPrivateDecl *OMPThreadPrivateDecl::Create(ASTContext &C,
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DeclContext *DC,
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SourceLocation L,
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ArrayRef<Expr *> VL) {
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OMPThreadPrivateDecl *D =
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new (C, DC, additionalSizeToAlloc<Expr *>(VL.size()))
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OMPThreadPrivateDecl(OMPThreadPrivate, DC, L);
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D->NumVars = VL.size();
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D->setVars(VL);
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return D;
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}
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OMPThreadPrivateDecl *OMPThreadPrivateDecl::CreateDeserialized(ASTContext &C,
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unsigned ID,
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unsigned N) {
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OMPThreadPrivateDecl *D = new (C, ID, additionalSizeToAlloc<Expr *>(N))
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OMPThreadPrivateDecl(OMPThreadPrivate, nullptr, SourceLocation());
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D->NumVars = N;
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return D;
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}
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void OMPThreadPrivateDecl::setVars(ArrayRef<Expr *> VL) {
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assert(VL.size() == NumVars &&
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"Number of variables is not the same as the preallocated buffer");
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std::uninitialized_copy(VL.begin(), VL.end(), getTrailingObjects<Expr *>());
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}
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//===----------------------------------------------------------------------===//
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// OMPDeclareReductionDecl Implementation.
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//===----------------------------------------------------------------------===//
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void OMPDeclareReductionDecl::anchor() {}
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OMPDeclareReductionDecl *OMPDeclareReductionDecl::Create(
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ASTContext &C, DeclContext *DC, SourceLocation L, DeclarationName Name,
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QualType T, OMPDeclareReductionDecl *PrevDeclInScope) {
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return new (C, DC) OMPDeclareReductionDecl(OMPDeclareReduction, DC, L, Name,
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T, PrevDeclInScope);
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}
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OMPDeclareReductionDecl *
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OMPDeclareReductionDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
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return new (C, ID) OMPDeclareReductionDecl(
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OMPDeclareReduction, /*DC=*/nullptr, SourceLocation(), DeclarationName(),
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QualType(), /*PrevDeclInScope=*/nullptr);
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}
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OMPDeclareReductionDecl *OMPDeclareReductionDecl::getPrevDeclInScope() {
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return cast_or_null<OMPDeclareReductionDecl>(
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PrevDeclInScope.get(getASTContext().getExternalSource()));
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}
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const OMPDeclareReductionDecl *
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OMPDeclareReductionDecl::getPrevDeclInScope() const {
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return cast_or_null<OMPDeclareReductionDecl>(
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PrevDeclInScope.get(getASTContext().getExternalSource()));
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}
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//===----------------------------------------------------------------------===//
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// OMPCapturedExprDecl Implementation.
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//===----------------------------------------------------------------------===//
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void OMPCapturedExprDecl::anchor() {}
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OMPCapturedExprDecl *OMPCapturedExprDecl::Create(ASTContext &C, DeclContext *DC,
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IdentifierInfo *Id,
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QualType T) {
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return new (C, DC) OMPCapturedExprDecl(C, DC, Id, T);
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}
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OMPCapturedExprDecl *OMPCapturedExprDecl::CreateDeserialized(ASTContext &C,
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unsigned ID) {
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return new (C, ID) OMPCapturedExprDecl(C, nullptr, nullptr, QualType());
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}
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